giles
6d5c410d68
WASM browser bundles rebuilt with latest kernel. Playwright test specs updated (helpers, navigation, handler-responses, hypermedia-handlers, isomorphic, SPA navigation). Engine/boot/orchestration SX files updated. Handler examples and not-found page refreshed. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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2 lines
413 KiB
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{"version":3,"sections":[{"offset":{"line":0,"column":94174},"map":{"version":3,"sources":["/workspace_root/lib/sx_types.ml","/builtin/blackbox.ml"],"sourcesContent":["(** Core types for the SX language.\n\n The [value] sum type represents every possible SX runtime value.\n OCaml's algebraic types make the CEK machine's frame dispatch a\n pattern match — exactly what the spec describes. *)\n\n(** {1 Symbol interning} *)\n\n(** Map symbol names to small integers for O(1) env lookups.\n The intern table is populated once per unique symbol name;\n all subsequent env operations use the integer key. *)\n\nlet sym_to_id : (string, int) Hashtbl.t = Hashtbl.create 512\nlet id_to_sym : (int, string) Hashtbl.t = Hashtbl.create 512\nlet sym_next = ref 0\n\nlet intern s =\n match Hashtbl.find_opt sym_to_id s with\n | Some id -> id\n | None ->\n let id = !sym_next in\n incr sym_next;\n Hashtbl.replace sym_to_id s id;\n Hashtbl.replace id_to_sym id s;\n id\n\nlet unintern id =\n match Hashtbl.find_opt id_to_sym id with\n | Some s -> s\n | None -> \"<sym:\" ^ string_of_int id ^ \">\"\n\n\n(** {1 Environment} *)\n\n(** Lexical scope chain. Each frame holds a mutable binding table\n keyed by interned symbol IDs for fast lookup. *)\ntype env = {\n bindings : (int, value) Hashtbl.t;\n parent : env option;\n}\n\n(** {1 Values} *)\n\nand value =\n | Nil\n | Bool of bool\n | Number of float\n | String of string\n | Symbol of string\n | Keyword of string\n | List of value list\n | Dict of dict\n | Lambda of lambda\n | Component of component\n | Island of island\n | Macro of macro\n | Thunk of value * env\n | Continuation of (value -> value) * dict option\n | NativeFn of string * (value list -> value)\n | Signal of signal\n | RawHTML of string\n | Spread of (string * value) list\n | SxExpr of string (** Opaque SX wire-format string — aser output. *)\n | Env of env (** First-class environment — used by CEK machine state dicts. *)\n | ListRef of value list ref (** Mutable list — JS-style array for append! *)\n | CekState of cek_state (** Optimized CEK machine state — avoids Dict allocation. *)\n | CekFrame of cek_frame (** Optimized CEK continuation frame. *)\n | VmClosure of vm_closure (** VM-compiled closure — callable within the VM without allocating a new VM. *)\n\n(** CEK machine state — record instead of Dict for performance.\n 5 fields × 55K steps/sec = 275K Hashtbl allocations/sec eliminated. *)\nand cek_state = {\n cs_control : value;\n cs_env : value;\n cs_kont : value;\n cs_phase : string;\n cs_value : value;\n}\n\n(** CEK continuation frame — tagged record covering all 29 frame types.\n Fields are named generically; not all are used by every frame type.\n Eliminates ~100K Hashtbl allocations per page render. *)\nand cek_frame = {\n cf_type : string; (* frame type tag: \"if\", \"let\", \"call\", etc. *)\n cf_env : value; (* environment — every frame has this *)\n cf_name : value; (* let/define/set/scope: binding name *)\n cf_body : value; (* when/let: body expr *)\n cf_remaining : value; (* begin/cond/map/etc: remaining exprs *)\n cf_f : value; (* call/map/filter/etc: function *)\n cf_args : value; (* call: raw args; arg: evaled args *)\n cf_results : value; (* map/filter/dict: accumulated results *)\n cf_extra : value; (* extra field: scheme, indexed, value, phase, etc. *)\n cf_extra2 : value; (* second extra: emitted, etc. *)\n}\n\n(** Mutable string-keyed table (SX dicts support [dict-set!]). *)\nand dict = (string, value) Hashtbl.t\n\nand lambda = {\n l_params : string list;\n l_body : value;\n l_closure : env;\n mutable l_name : string option;\n mutable l_compiled : vm_closure option; (** Lazy JIT cache *)\n}\n\nand component = {\n c_name : string;\n c_params : string list;\n c_has_children : bool;\n c_body : value;\n c_closure : env;\n c_affinity : string; (** \"auto\" | \"client\" | \"server\" *)\n mutable c_file : string option; (** Source file path *)\n mutable c_compiled : vm_closure option; (** Lazy JIT cache *)\n}\n\nand island = {\n i_name : string;\n i_params : string list;\n i_has_children : bool;\n i_body : value;\n i_closure : env;\n mutable i_file : string option; (** Source file path *)\n}\n\nand macro = {\n m_params : string list;\n m_rest_param : string option;\n m_body : value;\n m_closure : env;\n m_name : string option;\n}\n\nand signal = {\n mutable s_value : value;\n mutable s_subscribers : (unit -> unit) list;\n mutable s_deps : signal list;\n}\n\n(** {1 Bytecode VM types}\n\n Defined here (not in sx_vm.ml) because [vm_code.constants] references\n [value] and [lambda.l_compiled] references [vm_closure] — mutual\n recursion requires all types in one [and] chain. *)\n\n(** Compiled function body — bytecode + constant pool. *)\nand vm_code = {\n vc_arity : int;\n vc_locals : int;\n vc_bytecode : int array;\n vc_constants : value array;\n}\n\n(** Upvalue cell — shared mutable reference to a captured variable. *)\nand vm_upvalue_cell = {\n mutable uv_value : value;\n}\n\n(** Closure — compiled code + captured upvalues + live env reference. *)\nand vm_closure = {\n vm_code : vm_code;\n vm_upvalues : vm_upvalue_cell array;\n vm_name : string option;\n vm_env_ref : (string, value) Hashtbl.t;\n vm_closure_env : env option; (** Original closure env for inner functions *)\n}\n\n\n(** {1 Forward ref for calling VM closures from outside the VM} *)\n\nlet _vm_call_closure_ref : (vm_closure -> value list -> value) ref =\n ref (fun _ _ -> raise (Failure \"VM call_closure not initialized\"))\n\n\n(** {1 Errors} *)\n\nexception Eval_error of string\nexception Parse_error of string\n\n\n(** {1 Environment operations} *)\n\nlet make_env () =\n { bindings = Hashtbl.create 16; parent = None }\n\nlet env_extend parent =\n { bindings = Hashtbl.create 16; parent = Some parent }\n\n(* Optional hook: called after every env_bind with (env, name, value).\n Used by browser kernel to sync VM globals table. *)\nlet _env_bind_hook : (env -> string -> value -> unit) option ref = ref None\n\n(* Optional hook: called after VM GLOBAL_SET writes to vm.globals.\n Used by browser kernel to sync mutations back to global_env. *)\nlet _vm_global_set_hook : (string -> value -> unit) option ref = ref None\n\nlet env_bind env name v =\n Hashtbl.replace env.bindings (intern name) v;\n (match !_env_bind_hook with Some f -> f env name v | None -> ());\n Nil\n\n(* Internal: scope-chain lookup with pre-interned ID *)\nlet rec env_has_id env id =\n Hashtbl.mem env.bindings id ||\n match env.parent with Some p -> env_has_id p id | None -> false\n\nlet env_has env name = env_has_id env (intern name)\n\nlet rec env_get_id env id name =\n match Hashtbl.find_opt env.bindings id with\n | Some v -> v\n | None ->\n match env.parent with\n | Some p -> env_get_id p id name\n | None ->\n raise (Eval_error (\"Undefined symbol: \" ^ name))\n\nlet env_get env name = env_get_id env (intern name) name\n\nlet rec env_set_id env id v =\n if Hashtbl.mem env.bindings id then begin\n Hashtbl.replace env.bindings id v;\n (match !_env_bind_hook with Some f -> f env (unintern id) v | None -> ());\n Nil\n end else\n match env.parent with\n | Some p -> env_set_id p id v\n | None -> Hashtbl.replace env.bindings id v; Nil\n\nlet env_set env name v = env_set_id env (intern name) v\n\nlet env_merge base overlay =\n if base == overlay then\n { bindings = Hashtbl.create 16; parent = Some base }\n else begin\n let rec is_descendant e depth =\n if depth > 100 then false\n else if e == base then true\n else match e.parent with Some p -> is_descendant p (depth + 1) | None -> false\n in\n if is_descendant overlay 0 then\n { bindings = Hashtbl.create 16; parent = Some base }\n else begin\n let e = { bindings = Hashtbl.create 16; parent = Some base } in\n Hashtbl.iter (fun id v ->\n if not (env_has_id base id) then Hashtbl.replace e.bindings id v\n ) overlay.bindings;\n e\n end\n end\n\n\n(** {1 Value extraction helpers} *)\n\nlet value_to_string = function\n | String s -> s | Symbol s -> s | Keyword k -> k\n | Number n -> if Float.is_integer n then string_of_int (int_of_float n) else Printf.sprintf \"%g\" n\n | Bool true -> \"true\" | Bool false -> \"false\"\n | Nil -> \"\" | _ -> \"<value>\"\n\nlet value_to_string_list = function\n | List items | ListRef { contents = items } -> List.map value_to_string items\n | _ -> []\n\nlet value_to_bool = function\n | Bool b -> b | Nil -> false | _ -> true\n\nlet value_to_string_opt = function\n | String s -> Some s | Symbol s -> Some s | Nil -> None | _ -> None\n\n\n(** {1 Constructors — accept [value] args from transpiled code} *)\n\nlet unwrap_env_val = function\n | Env e -> e\n | _ -> raise (Eval_error \"make_lambda: expected env for closure\")\n\nlet make_lambda params body closure =\n let ps = match params with\n | List items -> List.map value_to_string items\n | _ -> value_to_string_list params\n in\n Lambda { l_params = ps; l_body = body; l_closure = unwrap_env_val closure; l_name = None; l_compiled = None }\n\nlet make_component name params has_children body closure affinity =\n let n = value_to_string name in\n let ps = value_to_string_list params in\n let hc = value_to_bool has_children in\n let aff = match affinity with String s -> s | _ -> \"auto\" in\n Component {\n c_name = n; c_params = ps; c_has_children = hc;\n c_body = body; c_closure = unwrap_env_val closure; c_affinity = aff;\n c_file = None; c_compiled = None;\n }\n\nlet make_island name params has_children body closure =\n let n = value_to_string name in\n let ps = value_to_string_list params in\n let hc = value_to_bool has_children in\n Island {\n i_name = n; i_params = ps; i_has_children = hc;\n i_body = body; i_closure = unwrap_env_val closure;\n i_file = None;\n }\n\nlet make_macro params rest_param body closure name =\n let ps = value_to_string_list params in\n let rp = value_to_string_opt rest_param in\n let n = value_to_string_opt name in\n Macro {\n m_params = ps; m_rest_param = rp;\n m_body = body; m_closure = unwrap_env_val closure; m_name = n;\n }\n\nlet make_thunk expr env = Thunk (expr, unwrap_env_val env)\n\nlet make_symbol name = Symbol (value_to_string name)\nlet make_keyword name = Keyword (value_to_string name)\n\n\n(** {1 Type inspection} *)\n\nlet type_of = function\n | Nil -> \"nil\"\n | Bool _ -> \"boolean\"\n | Number _ -> \"number\"\n | String _ -> \"string\"\n | Symbol _ -> \"symbol\"\n | Keyword _ -> \"keyword\"\n | List _ | ListRef _ -> \"list\"\n | Dict _ -> \"dict\"\n | Lambda _ -> \"lambda\"\n | Component _ -> \"component\"\n | Island _ -> \"island\"\n | Macro _ -> \"macro\"\n | Thunk _ -> \"thunk\"\n | Continuation (_, _) -> \"continuation\"\n | NativeFn _ -> \"function\"\n | Signal _ -> \"signal\"\n | RawHTML _ -> \"raw-html\"\n | Spread _ -> \"spread\"\n | SxExpr _ -> \"sx-expr\"\n | Env _ -> \"env\"\n | CekState _ -> \"dict\" (* CEK state behaves as a dict for type checks *)\n | CekFrame _ -> \"dict\"\n | VmClosure _ -> \"function\"\n\nlet is_nil = function Nil -> true | _ -> false\nlet is_lambda = function Lambda _ -> true | _ -> false\nlet is_component = function Component _ -> true | _ -> false\nlet is_island = function Island _ -> true | _ -> false\nlet is_macro = function Macro _ -> true | _ -> false\nlet is_thunk = function Thunk _ -> true | _ -> false\nlet is_signal = function\n | Signal _ -> true\n | Dict d -> Hashtbl.mem d \"__signal\"\n | _ -> false\n\nlet is_callable = function\n | Lambda _ | NativeFn _ | Continuation (_, _) | VmClosure _ -> true\n | _ -> false\n\n\n(** {1 Truthiness} *)\n\n(** SX truthiness: everything is truthy except [Nil] and [Bool false]. *)\nlet sx_truthy = function\n | Nil | Bool false -> false\n | _ -> true\n\n\n(** {1 Accessors} *)\n\nlet symbol_name = function\n | Symbol s -> String s\n | v -> raise (Eval_error (\"Expected symbol, got \" ^ type_of v))\n\nlet keyword_name = function\n | Keyword k -> String k\n | v -> raise (Eval_error (\"Expected keyword, got \" ^ type_of v))\n\nlet lambda_params = function\n | Lambda l -> List (List.map (fun s -> String s) l.l_params)\n | v -> raise (Eval_error (\"Expected lambda, got \" ^ type_of v))\n\nlet lambda_body = function\n | Lambda l -> l.l_body\n | v -> raise (Eval_error (\"Expected lambda, got \" ^ type_of v))\n\nlet lambda_closure = function\n | Lambda l -> Env l.l_closure\n | v -> raise (Eval_error (\"Expected lambda, got \" ^ type_of v))\n\nlet lambda_name = function\n | Lambda l -> (match l.l_name with Some n -> String n | None -> Nil)\n | v -> raise (Eval_error (\"Expected lambda, got \" ^ type_of v))\n\nlet set_lambda_name l n = match l with\n | Lambda l -> l.l_name <- Some n; Nil\n | _ -> raise (Eval_error \"set-lambda-name!: not a lambda\")\n\nlet component_name = function\n | Component c -> String c.c_name\n | Island i -> String i.i_name\n | v -> raise (Eval_error (\"Expected component, got \" ^ type_of v))\n\nlet component_file = function\n | Component c -> (match c.c_file with Some f -> String f | None -> Nil)\n | Island i -> (match i.i_file with Some f -> String f | None -> Nil)\n | _ -> Nil\n\nlet component_set_file v f =\n (match v, f with\n | Component c, String s -> c.c_file <- Some s\n | Island i, String s -> i.i_file <- Some s\n | _ -> ()); Nil\n\nlet component_set_file_b = component_set_file\n\nlet component_params = function\n | Component c -> List (List.map (fun s -> String s) c.c_params)\n | Island i -> List (List.map (fun s -> String s) i.i_params)\n | v -> raise (Eval_error (\"Expected component, got \" ^ type_of v))\n\nlet component_body = function\n | Component c -> c.c_body\n | Island i -> i.i_body\n | v -> raise (Eval_error (\"Expected component, got \" ^ type_of v))\n\nlet component_closure = function\n | Component c -> Env c.c_closure\n | Island i -> Env i.i_closure\n | v -> raise (Eval_error (\"Expected component, got \" ^ type_of v))\n\nlet component_has_children = function\n | Component c -> Bool c.c_has_children\n | Island i -> Bool i.i_has_children\n | v -> raise (Eval_error (\"Expected component, got \" ^ type_of v))\n\nlet component_affinity = function\n | Component c -> String c.c_affinity\n | Island _ -> String \"client\"\n | _ -> String \"auto\"\n\nlet macro_params = function\n | Macro m -> List (List.map (fun s -> String s) m.m_params)\n | v -> raise (Eval_error (\"Expected macro, got \" ^ type_of v))\n\nlet macro_rest_param = function\n | Macro m -> (match m.m_rest_param with Some s -> String s | None -> Nil)\n | v -> raise (Eval_error (\"Expected macro, got \" ^ type_of v))\n\nlet macro_body = function\n | Macro m -> m.m_body\n | v -> raise (Eval_error (\"Expected macro, got \" ^ type_of v))\n\nlet macro_closure = function\n | Macro m -> Env m.m_closure\n | v -> raise (Eval_error (\"Expected macro, got \" ^ type_of v))\n\nlet thunk_expr = function\n | Thunk (e, _) -> e\n | v -> raise (Eval_error (\"Expected thunk, got \" ^ type_of v))\n\nlet thunk_env = function\n | Thunk (_, e) -> Env e\n | v -> raise (Eval_error (\"Expected thunk, got \" ^ type_of v))\n\n\n(** {1 Dict operations} *)\n\nlet make_dict () : dict = Hashtbl.create 8\n\nlet dict_get (d : dict) key =\n match Hashtbl.find_opt d key with Some v -> v | None -> Nil\n\nlet dict_has (d : dict) key = Hashtbl.mem d key\n\nlet dict_set (d : dict) key v = Hashtbl.replace d key v\n\nlet dict_delete (d : dict) key = Hashtbl.remove d key\n\nlet dict_keys (d : dict) =\n Hashtbl.fold (fun k _ acc -> String k :: acc) d []\n\nlet dict_vals (d : dict) =\n Hashtbl.fold (fun _ v acc -> v :: acc) d []\n\n\n(** {1 Value display} *)\n\nlet rec inspect = function\n | Nil -> \"nil\"\n | Bool true -> \"true\"\n | Bool false -> \"false\"\n | Number n ->\n if Float.is_integer n then Printf.sprintf \"%d\" (int_of_float n)\n else Printf.sprintf \"%g\" n\n | String s ->\n let buf = Buffer.create (String.length s + 2) in\n Buffer.add_char buf '\"';\n String.iter (function\n | '\"' -> Buffer.add_string buf \"\\\\\\\"\"\n | '\\\\' -> Buffer.add_string buf \"\\\\\\\\\"\n | '\\n' -> Buffer.add_string buf \"\\\\n\"\n | '\\r' -> Buffer.add_string buf \"\\\\r\"\n | '\\t' -> Buffer.add_string buf \"\\\\t\"\n | c -> Buffer.add_char buf c) s;\n Buffer.add_char buf '\"';\n Buffer.contents buf\n | Symbol s -> s\n | Keyword k -> \":\" ^ k\n | List items | ListRef { contents = items } ->\n \"(\" ^ String.concat \" \" (List.map inspect items) ^ \")\"\n | Dict d ->\n let pairs = Hashtbl.fold (fun k v acc ->\n (Printf.sprintf \":%s %s\" k (inspect v)) :: acc) d [] in\n \"{\" ^ String.concat \" \" pairs ^ \"}\"\n | Lambda l ->\n let tag = match l.l_name with Some n -> n | None -> \"lambda\" in\n Printf.sprintf \"<%s(%s)>\" tag (String.concat \", \" l.l_params)\n | Component c ->\n Printf.sprintf \"<Component ~%s(%s)>\" c.c_name (String.concat \", \" c.c_params)\n | Island i ->\n Printf.sprintf \"<Island ~%s(%s)>\" i.i_name (String.concat \", \" i.i_params)\n | Macro m ->\n let tag = match m.m_name with Some n -> n | None -> \"macro\" in\n Printf.sprintf \"<%s(%s)>\" tag (String.concat \", \" m.m_params)\n | Thunk _ -> \"<thunk>\"\n | Continuation (_, _) -> \"<continuation>\"\n | NativeFn (name, _) -> Printf.sprintf \"<native:%s>\" name\n | Signal _ -> \"<signal>\"\n | RawHTML s -> Printf.sprintf \"\\\"<raw-html:%d>\\\"\" (String.length s)\n | Spread _ -> \"<spread>\"\n | SxExpr s -> Printf.sprintf \"\\\"<sx-expr:%d>\\\"\" (String.length s)\n | Env _ -> \"<env>\"\n | CekState _ -> \"<cek-state>\"\n | CekFrame f -> Printf.sprintf \"<frame:%s>\" f.cf_type\n | VmClosure cl -> Printf.sprintf \"<vm:%s>\" (match cl.vm_name with Some n -> n | None -> \"anon\")\n","(* generated code 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S-expression parser.\n\n Recursive descent over a string, producing [Sx_types.value list].\n Supports: lists, dicts, symbols, keywords, strings (with escapes),\n numbers, booleans, nil, comments, quote/quasiquote/unquote sugar. *)\n\nopen Sx_types\n\ntype state = {\n src : string;\n len : int;\n mutable pos : int;\n}\n\nlet make_state src = { src; len = String.length src; pos = 0 }\n\nlet peek s = if s.pos < s.len then Some s.src.[s.pos] else None\nlet advance s = s.pos <- s.pos + 1\nlet at_end s = s.pos >= s.len\n\nlet skip_whitespace_and_comments s =\n let rec go () =\n if at_end s then ()\n else match s.src.[s.pos] with\n | ' ' | '\\t' | '\\n' | '\\r' -> advance s; go ()\n | ';' ->\n while s.pos < s.len && s.src.[s.pos] <> '\\n' do advance s done;\n if s.pos < s.len then advance s;\n go ()\n | _ -> ()\n in go ()\n\n(* Character classification — matches spec/parser.sx ident-start/ident-char.\n ident-start: a-z A-Z _ ~ * + - > < = / ! ? &\n ident-char: ident-start plus 0-9 . : / # , *)\nlet is_ident_start = function\n | 'a'..'z' | 'A'..'Z' | '_' | '~' | '*' | '+' | '-'\n | '>' | '<' | '=' | '/' | '!' | '?' | '&' -> true\n | _ -> false\n\nlet is_ident_char = function\n | c when is_ident_start c -> true\n | '0'..'9' | '.' | ':' | '#' | ',' -> true\n | _ -> false\n\n(* Symbol reading uses ident_char; first char must be ident_start or digit/colon *)\nlet is_symbol_char = is_ident_char\n\nlet read_string s =\n (* s.pos is on the opening quote *)\n advance s;\n let buf = Buffer.create 64 in\n let rec go () =\n if at_end s then raise (Parse_error \"Unterminated string\");\n let c = s.src.[s.pos] in\n advance s;\n if c = '\"' then Buffer.contents buf\n else if c = '\\\\' then begin\n if at_end s then raise (Parse_error \"Unterminated string escape\");\n let esc = s.src.[s.pos] in\n advance s;\n (match esc with\n | 'n' -> Buffer.add_char buf '\\n'\n | 't' -> Buffer.add_char buf '\\t'\n | 'r' -> Buffer.add_char buf '\\r'\n | '\"' -> Buffer.add_char buf '\"'\n | '\\\\' -> Buffer.add_char buf '\\\\'\n | 'u' ->\n (* \\uXXXX — read 4 hex digits, encode as UTF-8 *)\n if s.pos + 4 > s.len then raise (Parse_error \"Incomplete \\\\u escape\");\n let hex = String.sub s.src s.pos 4 in\n s.pos <- s.pos + 4;\n let code = int_of_string (\"0x\" ^ hex) in\n let ubuf = Buffer.create 4 in\n Buffer.add_utf_8_uchar ubuf (Uchar.of_int code);\n Buffer.add_string buf (Buffer.contents ubuf)\n | '`' -> Buffer.add_char buf '`'\n | _ -> Buffer.add_char buf '\\\\'; Buffer.add_char buf esc);\n go ()\n end else begin\n Buffer.add_char buf c;\n go ()\n end\n in go ()\n\nlet read_symbol s =\n let start = s.pos in\n while s.pos < s.len && is_symbol_char s.src.[s.pos] do advance s done;\n String.sub s.src start (s.pos - start)\n\nlet try_number str =\n match float_of_string_opt str with\n | Some n -> Some (Number n)\n | None -> None\n\nlet rec read_value s : value =\n skip_whitespace_and_comments s;\n if at_end s then begin\n let line = ref 1 in\n String.iter (fun c -> if c = '\\n' then incr line) s.src;\n raise (Parse_error (Printf.sprintf \"Unexpected end of input at line %d (pos %d)\" !line s.pos))\n end;\n match s.src.[s.pos] with\n | '(' -> read_list s ')'\n | '[' -> read_list s ']'\n | '{' -> read_dict s\n | '\"' -> String (read_string s)\n | '\\'' -> advance s; List [Symbol \"quote\"; read_value s]\n | '`' -> advance s; List [Symbol \"quasiquote\"; read_value s]\n | '#' when s.pos + 1 < s.len && s.src.[s.pos + 1] = ';' ->\n (* Datum comment: #; discards next expression *)\n advance s; advance s;\n ignore (read_value s);\n read_value s\n | '#' when s.pos + 1 < s.len && s.src.[s.pos + 1] = '\\'' ->\n (* Quote shorthand: #'expr -> (quote expr) *)\n advance s; advance s;\n List [Symbol \"quote\"; read_value s]\n | '#' when s.pos + 1 < s.len && s.src.[s.pos + 1] = '|' ->\n (* Raw string: #|...| — ends at next | *)\n advance s; advance s;\n let buf = Buffer.create 64 in\n let rec go () =\n if at_end s then raise (Parse_error \"Unterminated raw string\");\n let c = s.src.[s.pos] in\n advance s;\n if c = '|' then\n String (Buffer.contents buf)\n else begin\n Buffer.add_char buf c;\n go ()\n end\n in go ()\n | ',' ->\n (* Unquote / splice-unquote — matches spec: , always triggers unquote *)\n advance s;\n if s.pos < s.len && s.src.[s.pos] = '@' then begin\n advance s;\n List [Symbol \"splice-unquote\"; read_value s]\n end else\n List [Symbol \"unquote\"; read_value s]\n | _ ->\n begin\n (* Symbol, keyword, number, or boolean *)\n let token = read_symbol s in\n if token = \"\" then begin\n let line = ref 1 and col = ref 1 in\n for i = 0 to s.pos - 1 do\n if s.src.[i] = '\\n' then (incr line; col := 1) else incr col\n done;\n raise (Parse_error (Printf.sprintf \"Unexpected char: %c at line %d col %d (pos %d)\"\n s.src.[s.pos] !line !col s.pos))\n end;\n match token with\n | \"true\" -> Bool true\n | \"false\" -> Bool false\n | \"nil\" -> Nil\n | _ when token.[0] = ':' ->\n Keyword (String.sub token 1 (String.length token - 1))\n | _ ->\n match try_number token with\n | Some n -> n\n | None -> Symbol token\n end\n\nand read_list s close_char =\n advance s; (* skip opening paren/bracket *)\n let items = ref [] in\n let rec go () =\n skip_whitespace_and_comments s;\n if at_end s then raise (Parse_error \"Unterminated list\");\n if s.src.[s.pos] = close_char then begin\n advance s;\n List (List.rev !items)\n end else begin\n items := read_value s :: !items;\n go ()\n end\n in go ()\n\nand read_dict s =\n advance s; (* skip { *)\n let d = make_dict () in\n let rec go () =\n skip_whitespace_and_comments s;\n if at_end s then raise (Parse_error \"Unterminated dict\");\n if s.src.[s.pos] = '}' then begin\n advance s;\n Dict d\n end else begin\n let key = read_value s in\n let key_str = match key with\n | Keyword k -> k\n | String k -> k\n | Symbol k -> k\n | _ -> raise (Parse_error \"Dict key must be keyword, string, or symbol\")\n in\n let v = read_value s in\n dict_set d key_str v;\n go ()\n end\n in go ()\n\n\n(** Parse a string into a list of SX values. *)\nlet parse_all src =\n let s = make_state src in\n let results = ref [] in\n let rec go () =\n skip_whitespace_and_comments s;\n if at_end s then List.rev !results\n else begin\n results := read_value s :: !results;\n go ()\n end\n in go ()\n\n(** Parse a file into a list of SX values. *)\nlet parse_file path =\n let ic = open_in path in\n let n = in_channel_length ic in\n let src = really_input_string ic n in\n close_in ic;\n parse_all src\n","(* generated code *)"],"names":[],"mappings":"EA2NW,EAAT,QAAS,eACT,QAAQ,eACE,IAAV,QAAU,eACV,wBAAW,QACE,C,QAjNM,2BAmMjB,iBACG,QAAQ,OAEc,IAAZ,QAAY,MACvB,KAHe,uB,GAKX,C,OApHgB,kBAAiB,uCAAS,C,oBAHlD,uBACG,QAAQ,K,CASoB,EAJ/B,O,CAAA,KAAM,OAAN,E,CAAA,KAAM,qBAAa,kBAIY,E,EAJZ,iCACV,E,CAAA,WAIC,E,CAAA,OAA6C,eAAZ,E,CAAA,MAAY,kBAE5C,E,CAAA,wB,CAAA,WAIT,EAJS,E,CAAA,eAAqB,MAArB,E,CAAA,KAAqB,uBAAiB,GAI/C,EAFA,E,CAAA,OAAW,E,CAAA,OACJ,E,CAAA,OACP,GAP6B,IAAf,E,CAAA,MAAe,OA6B7B,E,CAAA,OAAS,E,CAAA,e,CAAA,e,CAAA,KACW,OADX,E,CAAA,KACW,mBAAa,MAC/B,E,CAAA,OAC2C,eAAZ,E,CAAA,MAAY,mBAEP,eAAZ,E,CAAA,MAAY,kBA1B7B,E,CAAA,wB,CAAA,e,CAAA,eAAqB,MAArB,E,CAAA,KAAqB,uBAAiB,KAE/C,E,CAAA,OAAW,E,CAAA,OACuB,eAAZ,E,CAAA,MAAY,mBACzB,E,CAAA,wB,CAAA,WAKU,EALV,E,CAAA,eAAqB,MAArB,E,CAAA,KAAqB,uBAAiB,IAK5B,EAHnB,E,CAAA,OAAW,E,CAAA,OACD,KADU,OACV,eAEL,I,CAAA,MAAQ,OACX,E,CAAA,QAAQ,OAAR,E,CAAA,KAAQ,qBACR,E,CAAA,OAAS,QAEqB,IAArB,EAAP,OAAO,aAAqB,MAE5B,MADG,OACH,cAAqB,G,EANN,sB,IAAA,MAnBZ,I,CAAA,oBAIA,E,CAAA,OAAkD,eAAZ,E,CAAA,MAAY,0BAHlD,E,CAAA,SAuCO,E,CAAA,QACT,KAAU,OAQb,cAEa,mBACF,oBAFC,KAGH,mBAAS,KACsC,IAA9C,MAAR,OAAQ,EAAR,OAAQ,aAA8C,MAEhD,UAAgB,OAEZ,sBADE,E,UAdZ,E,CAAA,6CACK,QAAH,E,CAAA,QAAG,uBAAS,KAAa,KAAY,KAAe,M,EAAA,yBAEtD,E,CAAA,QACE,OADF,E,CAAA,KACE,mBADiB,UAAnB,E,CAAA,KAAmB,GACJ,OADI,iBACc,qB,EApDrC,EAFe,c,CAEf,oCAAuD,E,CAAA,YACpC,GADoC,OACpC,iBAA0E,wBA+D1F,C,YAGL,SAGE,iBACG,QAAQ,OACX,YAAG,OAAH,OAAG,Q,EAAA,SAAa,OACd,SACsB,IAAjB,EADI,OACJ,aAAiB,MAED,IAAZ,QAAY,MACrB,K,GANe,0BAQX,C,eAGR,SACQ,IADC,SACD,eAEN,WACG,QAAQ,OACX,YAAG,OAAH,OAAG,Q,EAAA,SAAa,MACd,SAAS,YAGC,UACV,G,CAAA,8BAOA,EAPA,OAMQ,QACR,uBAAoB,IAHX,sB,GAVM,0BAgBX,C,EA9GF,EAAN,OAAM,eAAuB,QAEnB,KADE,QACF,UADE,SACE,C,YAPd,cACA,S,CAAA,Y,CAAA,e,CAAA,KAAsC,OAAtC,E,CAAA,KAAsC,mBAAf,QAA4B,K,CAAA,EAAI,E,CAAA,OAAS,KAChE,E,CAAA,iB,CAAA,yCAAsC,C,iBAtCtC,SACU,KADD,OACC,eAEL,UAAQ,OACX,YAAQ,OAAR,OAAQ,Q,EAAA,WACR,SAAS,OACO,uBACX,QACA,QAAQ,OACX,UAAU,OAAV,OAAU,Q,EAAA,WACV,SAAS,gB,EAAA,qDASN,uCAA0B,sBAC1B,iBAAU,IAAV,OAAU,eACV,wBACyB,KAAzB,OAAyB,aAAd,IACA,IAAX,OAAW,eACiB,EAA5B,OAA4B,aAAmB,OAA/C,cACA,EAAsB,EADyB,OACzB,aAAsB,OAA5C,cAA4C,G,EAZrC,2BAAwB,GACxB,2BAAwB,GAFxB,2BAAwB,GAcxB,4BAAuB,GAVtB,4BAAwB,YADzB,2BAAuB,IAYzB,4BAA0B,MAAF,OAAE,cAClC,IApBiB,uBAsBjB,MADO,OACP,cAAqB,MA3BN,0BA8BX,C,KA1CC,QAAgB,oD,EAAA,a,GAAA,eACa,MAC/B,KAFsB,KAAJ,C,QANN,mC,EAAA,2D,EAAA,8CAE0B,MACtC,IAAK,C,cAhBP,UAAQ,O,EACN,YAAM,OAAN,OAAM,UAAa,EAAb,WAAa,iBAKtB,EALsB,uCAGC,OAHD,OAGC,mBAAa,KAAY,SAAS,KACzD,4BACA,EADsB,SACtB,0BAJ4B,SAAS,GAKhC,OAPU,UAQX,C,KAZK,gCAAc,C,KADb,iCAAkB,C,WADrB,gCAAsB,OAAK,OAAL,OAAK,Q,EAAa,IAAb,SAAa,SAAM,SAAI,C,KAF1C,yBAAyC,C,ECd9D,gE,QAAA,4D,UAAA,G,EAAA,E,CAAA,kC,CAAA,e,EAAA,W,EAAA,W,EAAA,Y,EAAA,c,QAAA","ignoreList":[1]}},{"offset":{"line":0,"column":107645},"map":{"version":3,"sources":["/workspace_root/lib/sx_primitives.ml","/builtin/blackbox.ml"],"sourcesContent":["(** Built-in primitive functions (~80 pure functions).\n\n Registered in a global table; the evaluator checks this table\n when a symbol isn't found in the lexical environment. *)\n\nopen Sx_types\n\nlet primitives : (string, value list -> value) Hashtbl.t = Hashtbl.create 128\n\n(** Forward refs for calling SX functions from primitives (breaks cycle). *)\nlet _sx_call_fn : (value -> value list -> value) ref =\n ref (fun _ _ -> raise (Eval_error \"sx_call not initialized\"))\nlet _sx_trampoline_fn : (value -> value) ref =\n ref (fun v -> v)\nlet _is_client : bool ref = ref false\n\nlet register name fn = Hashtbl.replace primitives name fn\n\nlet is_primitive name = Hashtbl.mem primitives name\n\nlet get_primitive name =\n match Hashtbl.find_opt primitives name with\n | Some fn -> NativeFn (name, fn)\n | None -> raise (Eval_error (\"Unknown primitive: \" ^ name))\n\n(* --- Helpers --- *)\n\n(* Trampoline hook — set by sx_ref after initialization to break circular dep *)\nlet trampoline_hook : (value -> value) ref = ref (fun v -> v)\n\nlet rec as_number = function\n | Number n -> n\n | Bool true -> 1.0\n | Bool false -> 0.0\n | Nil -> 0.0\n | String s -> (match float_of_string_opt s with Some n -> n | None -> Float.nan)\n | Thunk _ as t ->\n (* Trampoline thunks — they shouldn't leak but sometimes do *)\n as_number (!trampoline_hook t)\n | v -> raise (Eval_error (\"Expected number, got \" ^ type_of v ^ \": \" ^ (match v with Dict d -> (match Hashtbl.find_opt d \"__signal\" with Some _ -> \"signal{value=\" ^ (match Hashtbl.find_opt d \"value\" with Some v' -> value_to_string v' | None -> \"?\") ^ \"}\" | None -> \"dict\") | _ -> \"\")))\n\nlet as_string = function\n | String s -> s\n | v -> raise (Eval_error (\"Expected string, got \" ^ type_of v))\n\nlet rec as_list = function\n | List l -> l\n | ListRef r -> !r\n | Nil -> []\n | Thunk _ as t -> as_list (!_sx_trampoline_fn t)\n | v -> raise (Eval_error (\"Expected list, got \" ^ type_of v))\n\nlet as_bool = function\n | Bool b -> b\n | v -> sx_truthy v\n\nlet rec to_string = function\n | String s -> s\n | Number n ->\n if Float.is_integer n then string_of_int (int_of_float n)\n else Printf.sprintf \"%g\" n\n | Bool true -> \"true\"\n | Bool false -> \"false\"\n | Nil -> \"\"\n | Symbol s -> s\n | Keyword k -> k\n | Thunk _ as t -> to_string (!trampoline_hook t)\n | SxExpr s -> s\n | RawHTML s -> s\n | v -> inspect v\n\nlet () =\n (* === Arithmetic === *)\n register \"+\" (fun args ->\n Number (List.fold_left (fun acc a -> acc +. as_number a) 0.0 args));\n register \"-\" (fun args ->\n match args with\n | [] -> Number 0.0\n | [a] -> Number (-. (as_number a))\n | a :: rest -> Number (List.fold_left (fun acc x -> acc -. as_number x) (as_number a) rest));\n register \"*\" (fun args ->\n Number (List.fold_left (fun acc a -> acc *. as_number a) 1.0 args));\n register \"/\" (fun args ->\n match args with\n | [a; b] -> Number (as_number a /. as_number b)\n | _ -> raise (Eval_error \"/: expected 2 args\"));\n register \"mod\" (fun args ->\n match args with\n | [a; b] -> Number (Float.rem (as_number a) (as_number b))\n | _ -> raise (Eval_error \"mod: expected 2 args\"));\n register \"inc\" (fun args ->\n match args with [a] -> Number (as_number a +. 1.0) | _ -> raise (Eval_error \"inc: 1 arg\"));\n register \"dec\" (fun args ->\n match args with [a] -> Number (as_number a -. 1.0) | _ -> raise (Eval_error \"dec: 1 arg\"));\n register \"abs\" (fun args ->\n match args with [a] -> Number (Float.abs (as_number a)) | _ -> raise (Eval_error \"abs: 1 arg\"));\n register \"floor\" (fun args ->\n match args with [a] -> Number (floor (as_number a))\n | _ -> raise (Eval_error \"floor: 1 arg\"));\n register \"ceil\" (fun args ->\n match args with [a] -> Number (ceil (as_number a))\n | _ -> raise (Eval_error \"ceil: 1 arg\"));\n register \"round\" (fun args ->\n match args with\n | [a] -> Number (Float.round (as_number a))\n | [a; b] ->\n let n = as_number a and places = int_of_float (as_number b) in\n let factor = 10.0 ** float_of_int places in\n Number (Float.round (n *. factor) /. factor)\n | _ -> raise (Eval_error \"round: 1-2 args\"));\n register \"min\" (fun args ->\n match args with\n | [] -> raise (Eval_error \"min: at least 1 arg\")\n | _ -> Number (List.fold_left (fun acc a -> Float.min acc (as_number a)) Float.infinity args));\n register \"max\" (fun args ->\n match args with\n | [] -> raise (Eval_error \"max: at least 1 arg\")\n | _ -> Number (List.fold_left (fun acc a -> Float.max acc (as_number a)) Float.neg_infinity args));\n register \"sqrt\" (fun args ->\n match args with [a] -> Number (Float.sqrt (as_number a)) | _ -> raise (Eval_error \"sqrt: 1 arg\"));\n register \"pow\" (fun args ->\n match args with [a; b] -> Number (as_number a ** as_number b)\n | _ -> raise (Eval_error \"pow: 2 args\"));\n register \"clamp\" (fun args ->\n match args with\n | [x; lo; hi] ->\n let x = as_number x and lo = as_number lo and hi = as_number hi in\n Number (Float.max lo (Float.min hi x))\n | _ -> raise (Eval_error \"clamp: 3 args\"));\n register \"parse-int\" (fun args ->\n let parse_leading_int s =\n let len = String.length s in\n let start = ref 0 in\n let neg = len > 0 && s.[0] = '-' in\n if neg then start := 1\n else if len > 0 && s.[0] = '+' then start := 1;\n let j = ref !start in\n while !j < len && s.[!j] >= '0' && s.[!j] <= '9' do incr j done;\n if !j > !start then\n let n = int_of_string (String.sub s !start (!j - !start)) in\n Some (if neg then -n else n)\n else None\n in\n match args with\n | [String s] -> (match parse_leading_int s with Some n -> Number (float_of_int n) | None -> Nil)\n | [String s; default_val] ->\n (match parse_leading_int s with Some n -> Number (float_of_int n) | None -> default_val)\n | [Number n] | [Number n; _] -> Number (float_of_int (int_of_float n))\n | [_; default_val] -> default_val\n | _ -> Nil);\n register \"parse-float\" (fun args ->\n match args with\n | [String s] -> (match float_of_string_opt s with Some n -> Number n | None -> Nil)\n | [Number n] -> Number n\n | _ -> Nil);\n\n (* === Comparison === *)\n (* Safe equality: physical equality for potentially-circular types\n (Dict, Lambda, Component, Island, Signal, NativeFn),\n structural equality for acyclic types (Number, String, Bool, etc.).\n Lists are compared element-wise recursively with the same safety. *)\n let rec safe_eq a b =\n if a == b then true (* physical equality fast path *)\n else match a, b with\n | Number x, Number y -> x = y\n | String x, String y -> x = y\n | Bool x, Bool y -> x = y\n | Nil, Nil -> true\n | Symbol x, Symbol y -> x = y\n | Keyword x, Keyword y -> x = y\n | (List la | ListRef { contents = la }),\n (List lb | ListRef { contents = lb }) ->\n List.length la = List.length lb &&\n List.for_all2 safe_eq la lb\n (* Dict: check __host_handle for DOM node identity *)\n | Dict a, Dict b ->\n (match Hashtbl.find_opt a \"__host_handle\", Hashtbl.find_opt b \"__host_handle\" with\n | Some (Number ha), Some (Number hb) -> ha = hb\n | _ -> false)\n (* Lambda/Component/Island/Signal/NativeFn: physical only *)\n | _ -> false\n in\n register \"=\" (fun args ->\n match args with\n | [a; b] -> Bool (safe_eq a b)\n | _ -> raise (Eval_error \"=: 2 args\"));\n register \"!=\" (fun args ->\n match args with\n | [a; b] -> Bool (not (safe_eq a b))\n | _ -> raise (Eval_error \"!=: 2 args\"));\n register \"<\" (fun args ->\n match args with\n | [String a; String b] -> Bool (a < b)\n | [a; b] -> Bool (as_number a < as_number b)\n | _ -> raise (Eval_error \"<: 2 args\"));\n register \">\" (fun args ->\n match args with\n | [String a; String b] -> Bool (a > b)\n | [a; b] -> Bool (as_number a > as_number b)\n | _ -> raise (Eval_error \">: 2 args\"));\n register \"<=\" (fun args ->\n match args with\n | [String a; String b] -> Bool (a <= b)\n | [a; b] -> Bool (as_number a <= as_number b)\n | _ -> raise (Eval_error \"<=: 2 args\"));\n register \">=\" (fun args ->\n match args with\n | [String a; String b] -> Bool (a >= b)\n | [a; b] -> Bool (as_number a >= as_number b)\n | _ -> raise (Eval_error \">=: 2 args\"));\n\n (* === Logic === *)\n register \"not\" (fun args ->\n match args with [a] -> Bool (not (sx_truthy a)) | _ -> raise (Eval_error \"not: 1 arg\"));\n\n (* === Predicates === *)\n register \"nil?\" (fun args ->\n match args with [a] -> Bool (is_nil a) | _ -> raise (Eval_error \"nil?: 1 arg\"));\n register \"number?\" (fun args ->\n match args with [Number _] -> Bool true | [_] -> Bool false | _ -> raise (Eval_error \"number?: 1 arg\"));\n register \"string?\" (fun args ->\n match args with [String _] -> Bool true | [_] -> Bool false | _ -> raise (Eval_error \"string?: 1 arg\"));\n register \"boolean?\" (fun args ->\n match args with [Bool _] -> Bool true | [_] -> Bool false | _ -> raise (Eval_error \"boolean?: 1 arg\"));\n register \"list?\" (fun args ->\n match args with [List _] | [ListRef _] -> Bool true | [_] -> Bool false | _ -> raise (Eval_error \"list?: 1 arg\"));\n register \"dict?\" (fun args ->\n match args with [Dict _] -> Bool true | [_] -> Bool false | _ -> raise (Eval_error \"dict?: 1 arg\"));\n register \"symbol?\" (fun args ->\n match args with [Symbol _] -> Bool true | [_] -> Bool false | _ -> raise (Eval_error \"symbol?: 1 arg\"));\n register \"keyword?\" (fun args ->\n match args with [Keyword _] -> Bool true | [_] -> Bool false | _ -> raise (Eval_error \"keyword?: 1 arg\"));\n register \"empty?\" (fun args ->\n match args with\n | [List []] | [ListRef { contents = [] }] -> Bool true\n | [List _] | [ListRef _] -> Bool false\n | [String \"\"] -> Bool true | [String _] -> Bool false\n | [Dict d] -> Bool (Hashtbl.length d = 0)\n | [Nil] -> Bool true\n | [_] -> Bool false\n | _ -> raise (Eval_error \"empty?: 1 arg\"));\n register \"odd?\" (fun args ->\n match args with [a] -> Bool (int_of_float (as_number a) mod 2 <> 0) | _ -> raise (Eval_error \"odd?: 1 arg\"));\n register \"even?\" (fun args ->\n match args with [a] -> Bool (int_of_float (as_number a) mod 2 = 0) | _ -> raise (Eval_error \"even?: 1 arg\"));\n register \"zero?\" (fun args ->\n match args with [a] -> Bool (as_number a = 0.0) | _ -> raise (Eval_error \"zero?: 1 arg\"));\n\n (* === Strings === *)\n register \"str\" (fun args -> String (String.concat \"\" (List.map to_string args)));\n register \"upper\" (fun args ->\n match args with [a] -> String (String.uppercase_ascii (as_string a)) | _ -> raise (Eval_error \"upper: 1 arg\"));\n register \"upcase\" (fun args ->\n match args with [a] -> String (String.uppercase_ascii (as_string a)) | _ -> raise (Eval_error \"upcase: 1 arg\"));\n register \"lower\" (fun args ->\n match args with [a] -> String (String.lowercase_ascii (as_string a)) | _ -> raise (Eval_error \"lower: 1 arg\"));\n register \"downcase\" (fun args ->\n match args with [a] -> String (String.lowercase_ascii (as_string a)) | _ -> raise (Eval_error \"downcase: 1 arg\"));\n register \"trim\" (fun args ->\n match args with [a] -> String (String.trim (as_string a)) | _ -> raise (Eval_error \"trim: 1 arg\"));\n register \"string-length\" (fun args ->\n match args with [a] -> Number (float_of_int (String.length (as_string a)))\n | _ -> raise (Eval_error \"string-length: 1 arg\"));\n register \"string-contains?\" (fun args ->\n match args with\n | [String haystack; String needle] ->\n let rec find i =\n if i + String.length needle > String.length haystack then false\n else if String.sub haystack i (String.length needle) = needle then true\n else find (i + 1)\n in Bool (find 0)\n | _ -> raise (Eval_error \"string-contains?: 2 string args\"));\n register \"starts-with?\" (fun args ->\n match args with\n | [String s; String prefix] ->\n Bool (String.length s >= String.length prefix &&\n String.sub s 0 (String.length prefix) = prefix)\n | _ -> raise (Eval_error \"starts-with?: 2 string args\"));\n register \"ends-with?\" (fun args ->\n match args with\n | [String s; String suffix] ->\n let sl = String.length s and xl = String.length suffix in\n Bool (sl >= xl && String.sub s (sl - xl) xl = suffix)\n | _ -> raise (Eval_error \"ends-with?: 2 string args\"));\n register \"index-of\" (fun args ->\n match args with\n | [String haystack; String needle] ->\n let nl = String.length needle and hl = String.length haystack in\n let rec find i =\n if i + nl > hl then Number (-1.0)\n else if String.sub haystack i nl = needle then Number (float_of_int i)\n else find (i + 1)\n in find 0\n | [List items; target] | [ListRef { contents = items }; target] ->\n let eq a b = match a, b with\n | String x, String y -> x = y | Number x, Number y -> x = y\n | Symbol x, Symbol y -> x = y | Keyword x, Keyword y -> x = y\n | Bool x, Bool y -> x = y | Nil, Nil -> true | _ -> a == b in\n let rec find i = function\n | [] -> Nil\n | h :: _ when eq h target -> Number (float_of_int i)\n | _ :: tl -> find (i + 1) tl\n in find 0 items\n | _ -> raise (Eval_error \"index-of: 2 string args or list+target\"));\n register \"substring\" (fun args ->\n match args with\n | [String s; Number start; Number end_] ->\n let i = int_of_float start and j = int_of_float end_ in\n let len = String.length s in\n let i = max 0 (min i len) and j = max 0 (min j len) in\n String (String.sub s i (max 0 (j - i)))\n | _ -> raise (Eval_error \"substring: 3 args\"));\n register \"substr\" (fun args ->\n match args with\n | [String s; Number start; Number len] ->\n let i = int_of_float start and n = int_of_float len in\n let sl = String.length s in\n let i = max 0 (min i sl) in\n let n = max 0 (min n (sl - i)) in\n String (String.sub s i n)\n | [String s; Number start] ->\n let i = int_of_float start in\n let sl = String.length s in\n let i = max 0 (min i sl) in\n String (String.sub s i (sl - i))\n | _ -> raise (Eval_error \"substr: 2-3 args\"));\n register \"split\" (fun args ->\n match args with\n | [String s; String sep] ->\n List (List.map (fun p -> String p) (String.split_on_char sep.[0] s))\n | _ -> raise (Eval_error \"split: 2 args\"));\n register \"join\" (fun args ->\n match args with\n | [String sep; (List items | ListRef { contents = items })] ->\n String (String.concat sep (List.map to_string items))\n | _ -> raise (Eval_error \"join: 2 args\"));\n register \"replace\" (fun args ->\n let to_str = function\n | String s -> s | SxExpr s -> s | RawHTML s -> s\n | Keyword k -> k | Symbol s -> s\n | Nil -> \"\" | Bool true -> \"true\" | Bool false -> \"false\"\n | Number n -> if Float.is_integer n then string_of_int (int_of_float n) else Printf.sprintf \"%g\" n\n | Thunk _ as t -> (match !_sx_trampoline_fn t with String s -> s | v -> to_string v)\n | v -> to_string v\n in\n match args with\n | [s; old_s; new_s] ->\n let s = to_str s and old_s = to_str old_s and new_s = to_str new_s in\n let ol = String.length old_s in\n if ol = 0 then String s\n else begin\n let buf = Buffer.create (String.length s) in\n let rec go i =\n if i >= String.length s then ()\n else if i + ol <= String.length s && String.sub s i ol = old_s then begin\n Buffer.add_string buf new_s;\n go (i + ol)\n end else begin\n Buffer.add_char buf s.[i];\n go (i + 1)\n end\n in go 0;\n String (Buffer.contents buf)\n end\n | _ -> raise (Eval_error \"replace: 3 string args\"));\n register \"char-from-code\" (fun args ->\n match args with\n | [Number n] ->\n let buf = Buffer.create 4 in\n Buffer.add_utf_8_uchar buf (Uchar.of_int (int_of_float n));\n String (Buffer.contents buf)\n | _ -> raise (Eval_error \"char-from-code: 1 arg\"));\n\n (* === Collections === *)\n register \"list\" (fun args -> ListRef (ref args));\n register \"len\" (fun args ->\n match args with\n | [List l] | [ListRef { contents = l }] -> Number (float_of_int (List.length l))\n | [String s] -> Number (float_of_int (String.length s))\n | [Dict d] -> Number (float_of_int (Hashtbl.length d))\n | [Nil] | [Bool false] -> Number 0.0\n | [Bool true] -> Number 1.0\n | [Number _] -> Number 1.0\n | [RawHTML s] -> Number (float_of_int (String.length s))\n | [SxExpr s] -> Number (float_of_int (String.length s))\n | [Spread pairs] -> Number (float_of_int (List.length pairs))\n | [Component _] | [Island _] | [Lambda _] | [NativeFn _]\n | [Macro _] | [Thunk _] | [Keyword _] | [Symbol _] -> Number 0.0\n | _ -> raise (Eval_error (Printf.sprintf \"len: %d args\"\n (List.length args))));\n register \"length\" (Hashtbl.find primitives \"len\");\n register \"first\" (fun args ->\n match args with\n | [List (x :: _)] | [ListRef { contents = x :: _ }] -> x\n | [List []] | [ListRef { contents = [] }] -> Nil | [Nil] -> Nil\n | [x] -> raise (Eval_error (\"first: expected list, got \" ^ inspect x))\n | _ -> raise (Eval_error \"first: 1 list arg\"));\n register \"rest\" (fun args ->\n match args with\n | [List (_ :: xs)] | [ListRef { contents = _ :: xs }] -> List xs\n | [List []] | [ListRef { contents = [] }] -> List [] | [Nil] -> List []\n | _ -> raise (Eval_error \"rest: 1 list arg\"));\n register \"last\" (fun args ->\n match args with\n | [List l] | [ListRef { contents = l }] ->\n (match List.rev l with x :: _ -> x | [] -> Nil)\n | _ -> raise (Eval_error \"last: 1 list arg\"));\n register \"init\" (fun args ->\n match args with\n | [List l] | [ListRef { contents = l }] ->\n (match List.rev l with _ :: rest -> List (List.rev rest) | [] -> List [])\n | _ -> raise (Eval_error \"init: 1 list arg\"));\n register \"nth\" (fun args ->\n match args with\n | [List l; Number n] | [ListRef { contents = l }; Number n] ->\n (try List.nth l (int_of_float n) with _ -> Nil)\n | [String s; Number n] ->\n let i = int_of_float n in\n if i >= 0 && i < String.length s then String (String.make 1 s.[i])\n else Nil\n | _ -> raise (Eval_error \"nth: list/string and number\"));\n register \"cons\" (fun args ->\n match args with\n | [x; List l] | [x; ListRef { contents = l }] -> List (x :: l)\n | [x; Nil] -> List [x]\n | _ -> raise (Eval_error \"cons: value and list\"));\n register \"append\" (fun args ->\n match args with\n | [List la | ListRef { contents = la }; List lb | ListRef { contents = lb }] ->\n List (la @ lb)\n | [List la | ListRef { contents = la }; Nil] -> List la\n | [Nil; List lb | ListRef { contents = lb }] -> List lb\n | [List la | ListRef { contents = la }; v] -> List (la @ [v])\n | [v; List lb | ListRef { contents = lb }] -> List ([v] @ lb)\n | _ ->\n let all = List.concat_map as_list args in\n List all);\n register \"append!\" (fun args ->\n match args with\n | [ListRef r; item] -> r := !r @ [item]; ListRef r\n | [List items; item] -> List (items @ [item])\n | _ -> raise (Eval_error \"append!: list and item\"));\n register \"reverse\" (fun args ->\n match args with\n | [List l] | [ListRef { contents = l }] -> List (List.rev l)\n | _ -> raise (Eval_error \"reverse: 1 list\"));\n register \"flatten\" (fun args ->\n let rec flat = function\n | List items | ListRef { contents = items } -> List.concat_map flat items\n | x -> [x]\n in\n match args with\n | [List l] | [ListRef { contents = l }] -> List (List.concat_map flat l)\n | _ -> raise (Eval_error \"flatten: 1 list\"));\n register \"concat\" (fun args -> List (List.concat_map as_list args));\n register \"contains?\" (fun args ->\n match args with\n | [List l; item] | [ListRef { contents = l }; item] ->\n (* Physical equality first (handles signals/dicts/closures safely),\n structural fallback only for acyclic types (string/number/bool/nil/symbol/keyword) *)\n let safe_eq a b =\n a == b ||\n (match a, b with\n | Number x, Number y -> x = y\n | String x, String y -> x = y\n | Bool x, Bool y -> x = y\n | Nil, Nil -> true\n | Symbol x, Symbol y -> x = y\n | Keyword x, Keyword y -> x = y\n | Dict a, Dict b ->\n (match Hashtbl.find_opt a \"__host_handle\", Hashtbl.find_opt b \"__host_handle\" with\n | Some (Number ha), Some (Number hb) -> ha = hb\n | _ -> false)\n | _ -> false)\n in\n Bool (List.exists (fun x -> safe_eq x item) l)\n | [String s; String sub] ->\n let rec find i =\n if i + String.length sub > String.length s then false\n else if String.sub s i (String.length sub) = sub then true\n else find (i + 1)\n in Bool (find 0)\n | _ -> raise (Eval_error \"contains?: 2 args\"));\n register \"range\" (fun args ->\n match args with\n | [Number stop] ->\n let n = int_of_float stop in\n List (List.init (max 0 n) (fun i -> Number (float_of_int i)))\n | [Number start; Number stop] ->\n let s = int_of_float start and e = int_of_float stop in\n let len = max 0 (e - s) in\n List (List.init len (fun i -> Number (float_of_int (s + i))))\n | [Number start; Number stop; Number step] ->\n let s = start and e = stop and st = step in\n if st = 0.0 then List []\n else\n let items = ref [] in\n let i = ref s in\n if st > 0.0 then\n (while !i < e do items := Number !i :: !items; i := !i +. st done)\n else\n (while !i > e do items := Number !i :: !items; i := !i +. st done);\n List (List.rev !items)\n | _ -> raise (Eval_error \"range: 1-3 args\"));\n register \"slice\" (fun args ->\n match args with\n | [(List l | ListRef { contents = l }); Number start] ->\n let i = max 0 (int_of_float start) in\n let rec drop n = function _ :: xs when n > 0 -> drop (n-1) xs | l -> l in\n List (drop i l)\n | [(List l | ListRef { contents = l }); Number start; Number end_] ->\n let i = max 0 (int_of_float start) and j = int_of_float end_ in\n let len = List.length l in\n let j = min j len in\n let rec take_range idx = function\n | [] -> []\n | x :: xs ->\n if idx >= j then []\n else if idx >= i then x :: take_range (idx+1) xs\n else take_range (idx+1) xs\n in List (take_range 0 l)\n | [String s; Number start] ->\n let i = max 0 (int_of_float start) in\n String (String.sub s i (max 0 (String.length s - i)))\n | [String s; Number start; Number end_] ->\n let i = max 0 (int_of_float start) and j = int_of_float end_ in\n let sl = String.length s in\n let j = min j sl in\n String (String.sub s i (max 0 (j - i)))\n | _ -> raise (Eval_error \"slice: 2-3 args\"));\n register \"sort\" (fun args ->\n match args with\n | [List l] | [ListRef { contents = l }] -> List (List.sort compare l)\n | _ -> raise (Eval_error \"sort: 1 list\"));\n register \"zip\" (fun args ->\n match args with\n | [a; b] ->\n let la = as_list a and lb = as_list b in\n let rec go l1 l2 acc = match l1, l2 with\n | x :: xs, y :: ys -> go xs ys (List [x; y] :: acc)\n | _ -> List.rev acc\n in List (go la lb [])\n | _ -> raise (Eval_error \"zip: 2 lists\"));\n register \"zip-pairs\" (fun args ->\n match args with\n | [v] ->\n let l = as_list v in\n let rec go = function\n | a :: b :: rest -> List [a; b] :: go rest\n | _ -> []\n in List (go l)\n | _ -> raise (Eval_error \"zip-pairs: 1 list\"));\n register \"take\" (fun args ->\n match args with\n | [(List l | ListRef { contents = l }); Number n] ->\n let rec take_n i = function\n | x :: xs when i > 0 -> x :: take_n (i-1) xs\n | _ -> []\n in List (take_n (int_of_float n) l)\n | _ -> raise (Eval_error \"take: list and number\"));\n register \"drop\" (fun args ->\n match args with\n | [(List l | ListRef { contents = l }); Number n] ->\n let rec drop_n i = function\n | _ :: xs when i > 0 -> drop_n (i-1) xs\n | l -> l\n in List (drop_n (int_of_float n) l)\n | _ -> raise (Eval_error \"drop: list and number\"));\n register \"chunk-every\" (fun args ->\n match args with\n | [(List l | ListRef { contents = l }); Number n] ->\n let size = int_of_float n in\n let rec go = function\n | [] -> []\n | l ->\n let rec take_n i = function\n | x :: xs when i > 0 -> x :: take_n (i-1) xs\n | _ -> []\n in\n let rec drop_n i = function\n | _ :: xs when i > 0 -> drop_n (i-1) xs\n | l -> l\n in\n List (take_n size l) :: go (drop_n size l)\n in List (go l)\n | _ -> raise (Eval_error \"chunk-every: list and number\"));\n register \"unique\" (fun args ->\n match args with\n | [(List l | ListRef { contents = l })] ->\n let seen = Hashtbl.create 16 in\n let result = List.filter (fun x ->\n let key = inspect x in\n if Hashtbl.mem seen key then false\n else (Hashtbl.replace seen key true; true)\n ) l in\n List result\n | _ -> raise (Eval_error \"unique: 1 list\"));\n\n (* === Dict === *)\n register \"dict\" (fun args ->\n let d = make_dict () in\n let rec go = function\n | [] -> Dict d\n | Keyword k :: v :: rest -> dict_set d k v; go rest\n | String k :: v :: rest -> dict_set d k v; go rest\n | _ -> raise (Eval_error \"dict: pairs of key value\")\n in go args);\n register \"get\" (fun args ->\n match args with\n | [Dict d; String k] -> dict_get d k\n | [Dict d; Keyword k] -> dict_get d k\n | [List l; Number n] | [ListRef { contents = l }; Number n] ->\n (try List.nth l (int_of_float n) with _ -> Nil)\n | [Nil; _] -> Nil (* nil.anything → nil *)\n | [_; _] -> Nil (* type mismatch → nil (matches JS/Python behavior) *)\n | _ -> Nil);\n register \"has-key?\" (fun args ->\n match args with\n | [Dict d; String k] -> Bool (dict_has d k)\n | [Dict d; Keyword k] -> Bool (dict_has d k)\n | _ -> raise (Eval_error \"has-key?: dict and key\"));\n register \"assoc\" (fun args ->\n match args with\n | Dict d :: rest ->\n let d2 = Hashtbl.copy d in\n let rec go = function\n | [] -> Dict d2\n | String k :: v :: rest -> Hashtbl.replace d2 k v; go rest\n | Keyword k :: v :: rest -> Hashtbl.replace d2 k v; go rest\n | _ -> raise (Eval_error \"assoc: pairs\")\n in go rest\n | _ -> raise (Eval_error \"assoc: dict + pairs\"));\n register \"dissoc\" (fun args ->\n match args with\n | Dict d :: keys ->\n let d2 = Hashtbl.copy d in\n List.iter (fun k -> Hashtbl.remove d2 (to_string k)) keys;\n Dict d2\n | _ -> raise (Eval_error \"dissoc: dict + keys\"));\n register \"merge\" (fun args ->\n let d = make_dict () in\n List.iter (function\n | Dict src -> Hashtbl.iter (fun k v -> Hashtbl.replace d k v) src\n | _ -> raise (Eval_error \"merge: all args must be dicts\")\n ) args;\n Dict d);\n register \"keys\" (fun args ->\n match args with [Dict d] -> List (dict_keys d) | _ -> raise (Eval_error \"keys: 1 dict\"));\n register \"vals\" (fun args ->\n match args with [Dict d] -> List (dict_vals d) | _ -> raise (Eval_error \"vals: 1 dict\"));\n register \"mutable-list\" (fun _args -> ListRef (ref []));\n register \"set-nth!\" (fun args ->\n match args with\n | [ListRef r; Number n; v] ->\n let i = int_of_float n in\n let l = !r in\n r := List.mapi (fun j x -> if j = i then v else x) l;\n Nil\n | [List _; _; _] ->\n raise (Eval_error \"set-nth!: list is immutable, use ListRef\")\n | _ -> raise (Eval_error \"set-nth!: expected (list idx val)\"));\n register \"dict-set!\" (fun args ->\n match args with\n | [Dict d; String k; v] -> dict_set d k v; v\n | [Dict d; Keyword k; v] -> dict_set d k v; v\n | _ -> raise (Eval_error \"dict-set!: dict key val\"));\n register \"dict-get\" (fun args ->\n match args with\n | [Dict d; String k] -> dict_get d k\n | [Dict d; Keyword k] -> dict_get d k\n | _ -> raise (Eval_error \"dict-get: dict and key\"));\n register \"dict-has?\" (fun args ->\n match args with\n | [Dict d; String k] -> Bool (dict_has d k)\n | _ -> raise (Eval_error \"dict-has?: dict and key\"));\n register \"dict-delete!\" (fun args ->\n match args with\n | [Dict d; String k] -> dict_delete d k; Nil\n | _ -> raise (Eval_error \"dict-delete!: dict and key\"));\n\n (* === Misc === *)\n register \"type-of\" (fun args ->\n match args with [a] -> String (type_of a) | _ -> raise (Eval_error \"type-of: 1 arg\"));\n register \"inspect\" (fun args ->\n match args with [a] -> String (inspect a) | _ -> raise (Eval_error \"inspect: 1 arg\"));\n register \"serialize\" (fun args ->\n match args with\n | [SxExpr s] -> String s\n | [RawHTML s] -> String s\n | [Spread pairs] ->\n (* Serialize spread values as (make-spread {:key \"val\" ...}) *)\n let dict_parts = List.map (fun (k, v) ->\n Printf.sprintf \":%s %s\" k (inspect v)) pairs in\n String (Printf.sprintf \"(make-spread {%s})\" (String.concat \" \" dict_parts))\n | [Component c] ->\n (* Serialize component values as their ~name reference *)\n String (Printf.sprintf \"~%s\" c.c_name)\n | [Island i] ->\n String (Printf.sprintf \"~%s\" i.i_name)\n | [Lambda _] -> String \"<lambda>\"\n | [a] -> String (inspect a) (* used for dedup keys in compiler *)\n | _ -> raise (Eval_error \"serialize: 1 arg\"));\n register \"make-symbol\" (fun args ->\n match args with\n | [String s] -> Symbol s\n | _ -> raise (Eval_error \"make-symbol: expected string\"));\n register \"error\" (fun args ->\n match args with [String msg] -> raise (Eval_error msg)\n | [a] -> raise (Eval_error (to_string a))\n | _ -> raise (Eval_error \"error: 1 arg\"));\n register \"try-catch\" (fun args ->\n match args with\n | [try_fn; catch_fn] ->\n (try !_sx_trampoline_fn (!_sx_call_fn try_fn [])\n with Eval_error msg ->\n !_sx_trampoline_fn (!_sx_call_fn catch_fn [String msg]))\n | _ -> raise (Eval_error \"try-catch: expected (try-fn catch-fn)\"));\n (* client? — false by default (server); sx_browser.ml sets _is_client := true *)\n register \"client?\" (fun _args -> Bool !_is_client);\n (* Named stores — global mutable registry, bypasses env scoping issues *)\n let store_registry : (string, value) Hashtbl.t = Hashtbl.create 16 in\n register \"def-store\" (fun args ->\n match args with\n | [String name; init_fn] ->\n if not (Hashtbl.mem store_registry name) then begin\n let store = !_sx_trampoline_fn (!_sx_call_fn init_fn []) in\n Hashtbl.replace store_registry name store\n end;\n (match Hashtbl.find_opt store_registry name with Some v -> v | None -> Nil)\n | _ -> raise (Eval_error \"def-store: expected (name init-fn)\"));\n register \"use-store\" (fun args ->\n match args with\n | [String name] ->\n (match Hashtbl.find_opt store_registry name with\n | Some v -> v\n | None -> raise (Eval_error (\"Store not found: \" ^ name)))\n | _ -> raise (Eval_error \"use-store: expected (name)\"));\n register \"clear-stores\" (fun _args -> Hashtbl.clear store_registry; Nil);\n (* SSR stubs — resource returns loading state on server.\n NOTE: effect and register-in-scope must NOT be registered as primitives\n here — the bytecode compiler uses primitive? to decide CALL_PRIM vs\n GLOBAL_GET+CALL. If effect is a primitive, bytecoded modules emit\n CALL_PRIM which returns Nil instead of calling the real effect function\n from core-signals.sx. The server overrides effect in sx_server.ml via\n env_bind AFTER compilation. *)\n (* register \"effect\" — REMOVED: see note above *)\n (* register \"register-in-scope\" — REMOVED: see note above *)\n (* resource — SSR stub: return signal with {loading: true}, client hydrates real fetch *)\n register \"resource\" (fun _args ->\n let state = Hashtbl.create 8 in\n Hashtbl.replace state \"loading\" (Bool true);\n Hashtbl.replace state \"data\" Nil;\n Hashtbl.replace state \"error\" Nil;\n let sig_d = Hashtbl.create 8 in\n Hashtbl.replace sig_d \"__signal\" (Bool true);\n Hashtbl.replace sig_d \"value\" (Dict state);\n Hashtbl.replace sig_d \"subscribers\" (List []);\n Hashtbl.replace sig_d \"deps\" (List []);\n Dict sig_d);\n register \"apply\" (fun args ->\n let call f a =\n match f with\n | NativeFn (_, fn) -> fn a\n | _ -> !_sx_trampoline_fn (!_sx_call_fn f a)\n in\n match args with\n | [f; (List a | ListRef { contents = a })] -> call f a\n | [f; Nil] -> call f []\n | _ -> raise (Eval_error \"apply: function and list\"));\n register \"identical?\" (fun args ->\n match args with [a; b] -> Bool (a == b) | _ -> raise (Eval_error \"identical?: 2 args\"));\n register \"make-spread\" (fun args ->\n match args with\n | [Dict d] ->\n let pairs = Hashtbl.fold (fun k v acc -> (k, v) :: acc) d [] in\n Spread pairs\n | _ -> raise (Eval_error \"make-spread: 1 dict\"));\n register \"spread?\" (fun args ->\n match args with [Spread _] -> Bool true | [_] -> Bool false\n | _ -> raise (Eval_error \"spread?: 1 arg\"));\n register \"spread-attrs\" (fun args ->\n match args with\n | [Spread pairs] ->\n let d = make_dict () in\n List.iter (fun (k, v) -> dict_set d k v) pairs;\n Dict d\n | _ -> raise (Eval_error \"spread-attrs: 1 spread\"));\n\n (* Higher-order forms as callable primitives — used by the VM.\n The CEK machine handles these as special forms with dedicated frames;\n the VM needs them as plain callable values. *)\n (* Call any SX callable — handles NativeFn, Lambda (via trampoline), VM closures *)\n let call_any f args =\n match f with\n | NativeFn (_, fn) -> fn args\n | _ -> !_sx_trampoline_fn (!_sx_call_fn f args)\n in\n register \"map\" (fun args ->\n match args with\n | [f; (List items | ListRef { contents = items })] ->\n List (List.map (fun x -> call_any f [x]) items)\n | [_; Nil] -> List []\n | _ -> raise (Eval_error \"map: expected (fn list)\"));\n register \"map-indexed\" (fun args ->\n match args with\n | [f; (List items | ListRef { contents = items })] ->\n List (List.mapi (fun i x -> call_any f [Number (float_of_int i); x]) items)\n | [_; Nil] -> List []\n | _ -> raise (Eval_error \"map-indexed: expected (fn list)\"));\n register \"filter\" (fun args ->\n match args with\n | [f; (List items | ListRef { contents = items })] ->\n List (List.filter (fun x -> sx_truthy (call_any f [x])) items)\n | [_; Nil] -> List []\n | _ -> raise (Eval_error \"filter: expected (fn list)\"));\n register \"for-each\" (fun args ->\n match args with\n | [f; (List items | ListRef { contents = items })] ->\n List.iter (fun x -> ignore (call_any f [x])) items; Nil\n | [_; Nil] -> Nil (* nil collection = no-op *)\n | _ ->\n let types = String.concat \", \" (List.map (fun v -> type_of v) args) in\n raise (Eval_error (Printf.sprintf \"for-each: expected (fn list), got (%s) %d args\" types (List.length args))));\n register \"reduce\" (fun args ->\n match args with\n | [f; init; (List items | ListRef { contents = items })] ->\n List.fold_left (fun acc x -> call_any f [acc; x]) init items\n | _ -> raise (Eval_error \"reduce: expected (fn init list)\"));\n register \"some\" (fun args ->\n match args with\n | [f; (List items | ListRef { contents = items })] ->\n let rec find = function\n | [] -> Bool false\n | x :: rest ->\n let result = call_any f [x] in\n if sx_truthy result then result else find rest\n in find items\n | [_; Nil] -> Bool false\n | _ -> raise (Eval_error \"some: expected (fn list)\"));\n register \"every?\" (fun args ->\n match args with\n | [f; (List items | ListRef { contents = items })] ->\n Bool (List.for_all (fun x -> sx_truthy (call_any f [x])) items)\n | [_; Nil] -> Bool true\n | _ -> raise (Eval_error \"every?: expected (fn list)\"));\n\n (* ---- VM stack primitives (vm.sx platform interface) ---- *)\n register \"make-vm-stack\" (fun args ->\n match args with\n | [Number n] -> ListRef (ref (List.init (int_of_float n) (fun _ -> Nil)))\n | _ -> raise (Eval_error \"make-vm-stack: expected (size)\"));\n register \"vm-stack-get\" (fun args ->\n match args with\n | [ListRef r; Number n] -> List.nth !r (int_of_float n)\n | _ -> raise (Eval_error \"vm-stack-get: expected (stack idx)\"));\n register \"vm-stack-set!\" (fun args ->\n match args with\n | [ListRef r; Number n; v] ->\n let i = int_of_float n in\n r := List.mapi (fun j x -> if j = i then v else x) !r; Nil\n | _ -> raise (Eval_error \"vm-stack-set!: expected (stack idx val)\"));\n register \"vm-stack-length\" (fun args ->\n match args with\n | [ListRef r] -> Number (float_of_int (List.length !r))\n | _ -> raise (Eval_error \"vm-stack-length: expected (stack)\"));\n register \"vm-stack-copy!\" (fun args ->\n match args with\n | [ListRef src; ListRef dst; Number n] ->\n let count = int_of_float n in\n let src_items = !src in\n dst := List.mapi (fun i x -> if i < count then List.nth src_items i else x) !dst; Nil\n | _ -> raise (Eval_error \"vm-stack-copy!: expected (src dst count)\"));\n register \"primitive?\" (fun args ->\n match args with\n | [String name] -> Bool (Hashtbl.mem primitives name)\n | _ -> Bool false);\n\n (* Scope stack primitives are registered by sx_server.ml / run_tests.ml\n because they use a shared scope stacks table with collect!/collected. *)\n\n (* ---- Predicates needed by adapter-html.sx ---- *)\n register \"lambda?\" (fun args ->\n match args with [Lambda _] -> Bool true | _ -> Bool false);\n register \"island?\" (fun args ->\n match args with [Island _] -> Bool true | _ -> Bool false);\n register \"is-else-clause?\" (fun args ->\n match args with\n | [Keyword \"else\"] -> Bool true\n | [Bool true] -> Bool true\n | _ -> Bool false);\n register \"cond-scheme?\" (fun args ->\n match args with\n | [List clauses] ->\n Bool (List.for_all (fun c ->\n match c with\n | List l -> List.length l = 2\n | _ -> false) clauses)\n | _ -> Bool false);\n register \"component?\" (fun args ->\n match args with [Component _] -> Bool true | [Island _] -> Bool true | _ -> Bool false);\n register \"lambda-closure\" (fun args ->\n match args with [Lambda l] -> Env l.l_closure | _ -> Nil);\n register \"component-closure\" (fun args ->\n match args with\n | [Component c] -> Env c.c_closure\n | [Island i] -> Env i.i_closure\n | _ -> Nil);\n register \"component-has-children?\" (fun args ->\n match args with\n | [Component c] -> Bool c.c_has_children\n | [Island i] -> Bool i.i_has_children\n | _ -> Bool false);\n register \"component-name\" (fun args ->\n match args with\n | [Component c] -> String c.c_name\n | [Island i] -> String i.i_name\n | _ -> Nil);\n register \"component-params\" (fun args ->\n match args with\n | [Component c] -> List (List.map (fun s -> String s) c.c_params)\n | [Island i] -> List (List.map (fun s -> String s) i.i_params)\n | _ -> List []);\n register \"component-body\" (fun args ->\n match args with\n | [Component c] -> c.c_body\n | [Island i] -> i.i_body\n | _ -> Nil);\n register \"component-file\" (fun args ->\n match args with [v] -> component_file v | _ -> Nil);\n register \"component-set-file!\" (fun args ->\n match args with [v; f] -> component_set_file v f | _ -> Nil);\n register \"macro?\" (fun args ->\n match args with [Macro _] -> Bool true | _ -> Bool false);\n register \"for-each-indexed\" (fun args ->\n match args with\n | [f; (List items | ListRef { contents = items })] ->\n List.iteri (fun i x -> ignore (call_any f [Number (float_of_int i); x])) items; Nil\n | _ -> raise (Eval_error \"for-each-indexed: expected (fn list)\"));\n register \"lambda-params\" (fun args ->\n match args with\n | [Lambda l] -> List (List.map (fun s -> String s) l.l_params)\n | _ -> List []);\n register \"lambda-body\" (fun args ->\n match args with [Lambda l] -> l.l_body | _ -> Nil);\n (* expand-macro is registered later by run_tests.ml / sx_server.ml\n because it needs eval_expr which creates a dependency cycle *);\n register \"empty-dict?\" (fun args ->\n match args with\n | [Dict d] -> Bool (Hashtbl.length d = 0)\n | _ -> Bool true);\n register \"make-raw-html\" (fun args ->\n match args with [String s] -> RawHTML s | _ -> Nil);\n register \"raw-html-content\" (fun args ->\n match args with [RawHTML s] -> String s | _ -> String \"\");\n register \"get-primitive\" (fun args ->\n match args with\n | [String name] ->\n (match Hashtbl.find_opt primitives name with\n | Some fn -> NativeFn (name, fn)\n | None -> raise (Eval_error (\"VM undefined: \" ^ name)))\n | _ -> raise (Eval_error \"get-primitive: expected (name)\"));\n register \"call-primitive\" (fun args ->\n match args with\n | [String name; (List a | ListRef { contents = a })] ->\n (match Hashtbl.find_opt primitives name with\n | Some fn -> fn a\n | None -> raise (Eval_error (\"VM undefined: \" ^ name)))\n | [String name; Nil] ->\n (match Hashtbl.find_opt primitives name with\n | Some fn -> fn []\n | None -> raise (Eval_error (\"VM undefined: \" ^ name)))\n | _ -> raise (Eval_error \"call-primitive: expected (name args-list)\"));\n ()\n","(* generated code 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Runtime helpers for transpiled code.\n\n These bridge the gap between the transpiler's output and the\n foundation types/primitives. The transpiled evaluator calls these\n functions directly. *)\n\nopen Sx_types\n\n(** Call a registered primitive by name. *)\nlet prim_call name args =\n match Hashtbl.find_opt Sx_primitives.primitives name with\n | Some f -> f args\n | None -> raise (Eval_error (\"Unknown primitive: \" ^ name))\n\n(** Convert any SX value to an OCaml string (internal). *)\nlet value_to_str = function\n | String s -> s\n | Number n ->\n if Float.is_integer n then string_of_int (int_of_float n)\n else Printf.sprintf \"%g\" n\n | Bool true -> \"true\"\n | Bool false -> \"false\"\n | Nil -> \"\"\n | Symbol s -> s\n | Keyword k -> k\n | v -> inspect v\n\n(** sx_to_string returns a value (String) for transpiled code. *)\nlet sx_to_string v = String (value_to_str v)\n\n(** String concatenation helper — [sx_str] takes a list of values. *)\nlet sx_str args =\n String.concat \"\" (List.map value_to_str args)\n\n(** Convert a value to a list. *)\nlet sx_to_list = function\n | List l -> l\n | ListRef r -> !r\n | Nil -> []\n | v -> raise (Eval_error (\"Expected list, got \" ^ type_of v))\n\n(** Call an SX callable (lambda, native fn, continuation). *)\nlet sx_call f args =\n match f with\n | NativeFn (_, fn) -> fn args\n | VmClosure cl -> !Sx_types._vm_call_closure_ref cl args\n | Lambda l ->\n let local = Sx_types.env_extend l.l_closure in\n List.iter2 (fun p a -> ignore (Sx_types.env_bind local p a)) l.l_params args;\n Thunk (l.l_body, local)\n | Continuation (k, _) ->\n k (match args with x :: _ -> x | [] -> Nil)\n | _ ->\n let nargs = List.length args in\n let args_preview = if nargs = 0 then \"\" else\n let s = String.concat \", \" (List.map (fun a -> let s = inspect a in if String.length s > 40 then String.sub s 0 40 ^ \"..\" else s) args) in\n \" with args=[\" ^ s ^ \"]\" in\n raise (Eval_error (\"Not callable: \" ^ inspect f ^ args_preview))\n\n(* Initialize forward ref so primitives can call SX functions *)\nlet () = Sx_primitives._sx_call_fn := sx_call\n(* Trampoline ref is set by sx_ref.ml after it's loaded *)\n\n(** Apply a function to a list of args. *)\nlet sx_apply f args_list =\n sx_call f (sx_to_list args_list)\n\n(** Mutable append — add item to a list ref or accumulator.\n In transpiled code, lists that get appended to are mutable refs. *)\nlet sx_append_b lst item =\n match lst with\n | List items -> List (items @ [item])\n | ListRef r -> r := !r @ [item]; lst (* mutate in place, return same ref *)\n | _ -> raise (Eval_error (\"append!: expected list, got \" ^ type_of lst))\n\n(** Mutable dict-set — set key in dict, return value. *)\nlet sx_dict_set_b d k v =\n match d, k with\n | Dict tbl, String key -> Hashtbl.replace tbl key v; v\n | Dict tbl, Keyword key -> Hashtbl.replace tbl key v; v\n | _ -> raise (Eval_error \"dict-set!: expected dict and string key\")\n\n(** Get from dict or list. *)\nlet get_val container key =\n match container, key with\n | CekState s, String k ->\n (match k with\n | \"control\" -> s.cs_control | \"env\" -> s.cs_env\n | \"kont\" -> s.cs_kont | \"phase\" -> String s.cs_phase\n | \"value\" -> s.cs_value | _ -> Nil)\n | CekFrame f, String k ->\n (match k with\n | \"type\" -> String f.cf_type | \"env\" -> f.cf_env\n | \"name\" -> f.cf_name | \"body\" -> f.cf_body\n | \"remaining\" -> f.cf_remaining | \"f\" -> f.cf_f\n | \"args\" -> f.cf_args | \"evaled\" -> f.cf_args\n | \"results\" -> f.cf_results | \"raw-args\" -> f.cf_results\n | \"then\" -> f.cf_body | \"else\" -> f.cf_name\n | \"ho-type\" -> f.cf_extra | \"scheme\" -> f.cf_extra\n | \"indexed\" -> f.cf_extra | \"value\" -> f.cf_extra\n | \"phase\" -> f.cf_extra | \"has-effects\" -> f.cf_extra\n | \"match-val\" -> f.cf_extra | \"current-item\" -> f.cf_extra\n | \"update-fn\" -> f.cf_extra | \"head-name\" -> f.cf_extra\n | \"emitted\" -> f.cf_extra2 | \"effect-list\" -> f.cf_extra2\n | \"first-render\" -> f.cf_extra2 | \"file\" -> f.cf_env\n | _ -> Nil)\n | Dict d, String k -> dict_get d k\n | Dict d, Keyword k -> dict_get d k\n | (List l | ListRef { contents = l }), Number n ->\n (try List.nth l (int_of_float n) with _ -> Nil)\n | Nil, _ -> Nil (* nil.anything → nil *)\n | _, _ -> Nil (* type mismatch → nil (matches JS/Python behavior) *)\n\n(** Register get as a primitive override — transpiled code calls (get d k). *)\nlet () =\n Sx_primitives.register \"get\" (fun args ->\n match args with\n | [c; k] -> get_val c k\n | [c; k; default] ->\n (try\n let v = get_val c k in\n if v = Nil then default else v\n with _ -> default)\n | _ -> raise (Eval_error \"get: 2-3 args\"))\n\n\n(* ====================================================================== *)\n(* Primitive aliases — top-level functions called by transpiled code *)\n(* ====================================================================== *)\n\n(** The transpiled evaluator calls primitives directly by their mangled\n OCaml name. These aliases delegate to the primitives table so the\n transpiled code compiles without needing [prim_call] everywhere. *)\n\nlet _prim name = match Hashtbl.find_opt Sx_primitives.primitives name with\n | Some f -> f | None -> (fun _ -> raise (Eval_error (\"Missing prim: \" ^ name)))\n\n(* Collection ops *)\nlet first args = _prim \"first\" [args]\nlet rest args = _prim \"rest\" [args]\nlet last args = _prim \"last\" [args]\nlet nth coll i = _prim \"nth\" [coll; i]\nlet cons x l = _prim \"cons\" [x; l]\nlet append a b = _prim \"append\" [a; b]\nlet reverse l = _prim \"reverse\" [l]\nlet flatten l = _prim \"flatten\" [l]\nlet concat a b = _prim \"concat\" [a; b]\nlet slice a b = _prim \"slice\" [a; b]\nlet len a = _prim \"len\" [a]\nlet get a b = get_val a b\nlet sort' a = _prim \"sort\" [a]\nlet range' a = _prim \"range\" [a]\nlet unique a = _prim \"unique\" [a]\nlet zip a b = _prim \"zip\" [a; b]\nlet zip_pairs a = _prim \"zip-pairs\" [a]\nlet take a b = _prim \"take\" [a; b]\nlet drop a b = _prim \"drop\" [a; b]\nlet chunk_every a b = _prim \"chunk-every\" [a; b]\n\n(* Predicates *)\nlet empty_p a = _prim \"empty?\" [a]\nlet nil_p a = _prim \"nil?\" [a]\nlet number_p a = _prim \"number?\" [a]\nlet string_p a = _prim \"string?\" [a]\nlet boolean_p a = _prim \"boolean?\" [a]\nlet list_p a = _prim \"list?\" [a]\nlet dict_p a = _prim \"dict?\" [a]\nlet symbol_p a = _prim \"symbol?\" [a]\nlet keyword_p a = _prim \"keyword?\" [a]\nlet contains_p a b = _prim \"contains?\" [a; b]\nlet has_key_p a b = _prim \"has-key?\" [a; b]\nlet starts_with_p a b = _prim \"starts-with?\" [a; b]\nlet ends_with_p a b = _prim \"ends-with?\" [a; b]\nlet string_contains_p a b = _prim \"string-contains?\" [a; b]\nlet odd_p a = _prim \"odd?\" [a]\nlet even_p a = _prim \"even?\" [a]\nlet zero_p a = _prim \"zero?\" [a]\n\n(* String ops *)\nlet str' args = String (sx_str args)\nlet upper a = _prim \"upper\" [a]\nlet upcase a = _prim \"upcase\" [a]\nlet lower a = _prim \"lower\" [a]\nlet downcase a = _prim \"downcase\" [a]\nlet trim a = _prim \"trim\" [a]\nlet split a b = _prim \"split\" [a; b]\nlet join a b = _prim \"join\" [a; b]\nlet replace a b c = _prim \"replace\" [a; b; c]\nlet index_of a b = _prim \"index-of\" [a; b]\nlet substring a b c = _prim \"substring\" [a; b; c]\nlet string_length a = _prim \"string-length\" [a]\nlet char_from_code a = _prim \"char-from-code\" [a]\n\n(* Dict ops *)\nlet assoc d k v = _prim \"assoc\" [d; k; v]\nlet dissoc d k = _prim \"dissoc\" [d; k]\nlet merge' a b = _prim \"merge\" [a; b]\nlet keys a = _prim \"keys\" [a]\nlet vals a = _prim \"vals\" [a]\nlet dict_set a b c = _prim \"dict-set!\" [a; b; c]\nlet dict_get a b = _prim \"dict-get\" [a; b]\nlet dict_has_p a b = _prim \"dict-has?\" [a; b]\nlet dict_delete a b = _prim \"dict-delete!\" [a; b]\n\n(* Math *)\nlet abs' a = _prim \"abs\" [a]\nlet sqrt' a = _prim \"sqrt\" [a]\nlet pow' a b = _prim \"pow\" [a; b]\nlet floor' a = _prim \"floor\" [a]\nlet ceil' a = _prim \"ceil\" [a]\nlet round' a = _prim \"round\" [a]\nlet min' a b = _prim \"min\" [a; b]\nlet max' a b = _prim \"max\" [a; b]\nlet clamp a b c = _prim \"clamp\" [a; b; c]\nlet parse_int a = _prim \"parse-int\" [a]\nlet parse_float a = _prim \"parse-float\" [a]\n\n(* Misc *)\nlet error msg = raise (Eval_error (value_to_str msg))\n\n(* inspect wrapper — returns String value instead of OCaml string *)\nlet inspect v = String (Sx_types.inspect v)\nlet apply' f args = sx_apply f args\nlet identical_p a b = _prim \"identical?\" [a; b]\nlet _is_spread_prim a = _prim \"spread?\" [a]\nlet spread_attrs a = _prim \"spread-attrs\" [a]\nlet make_spread a = _prim \"make-spread\" [a]\n\n(* Scope primitives — delegate to sx_ref.py's shared scope stacks *)\nlet sx_collect a b = prim_call \"collect!\" [a; b]\nlet sx_collected a = prim_call \"collected\" [a]\nlet sx_clear_collected a = prim_call \"clear-collected!\" [a]\nlet sx_emit a b = prim_call \"emit!\" [a; b]\nlet sx_emitted a = prim_call \"emitted\" [a]\nlet sx_context a b = prim_call \"context\" [a; b]\n\n(* Trampoline — forward-declared in sx_ref.ml, delegates to CEK eval_expr *)\n(* This is a stub; the real trampoline is wired up in sx_ref.ml after eval_expr is defined *)\nlet trampoline v = v\n\n(* Value-returning type predicates — the transpiled code passes these through\n sx_truthy, so they need to return Bool, not OCaml bool. *)\n(* type_of returns value, not string *)\nlet type_of v = String (Sx_types.type_of v)\n\n(* Env operations — accept Env-wrapped values and value keys.\n The transpiled CEK machine stores envs in dicts as Env values. *)\nlet unwrap_env = function\n | Env e -> e\n | Dict d ->\n (* Dict used as env — wrap it. Needed by adapter-html.sx which\n passes dicts as env args (e.g. empty {} as caller env). *)\n let e = Sx_types.make_env () in\n Hashtbl.iter (fun k v -> ignore (Sx_types.env_bind e k v)) d;\n e\n | Nil ->\n Sx_types.make_env ()\n | v -> raise (Eval_error (\"Expected env, got \" ^ Sx_types.type_of v))\n\nlet env_has e name = Bool (Sx_types.env_has (unwrap_env e) (value_to_str name))\nlet env_get e name = Sx_types.env_get (unwrap_env e) (value_to_str name)\nlet env_bind e name v = Sx_types.env_bind (unwrap_env e) (value_to_str name) v\nlet env_set e name v = Sx_types.env_set (unwrap_env e) (value_to_str name) v\n\nlet make_env () = Env (Sx_types.make_env ())\nlet env_extend e = Env (Sx_types.env_extend (unwrap_env e))\nlet env_merge a b = Env (Sx_types.env_merge (unwrap_env a) (unwrap_env b))\n\n(* set_lambda_name wrapper — accepts value, extracts string *)\nlet set_lambda_name l n = Sx_types.set_lambda_name l (value_to_str n)\n\nlet is_nil v = Bool (Sx_types.is_nil v)\nlet is_thunk v = Bool (Sx_types.is_thunk v)\nlet is_lambda v = Bool (Sx_types.is_lambda v)\nlet is_component v = Bool (Sx_types.is_component v)\nlet is_island v = Bool (Sx_types.is_island v)\nlet is_macro v = Bool (Sx_types.is_macro v)\nlet is_signal v = Bool (Sx_types.is_signal v)\nlet is_callable v = Bool (Sx_types.is_callable v)\nlet is_identical a b = Bool (a == b)\nlet is_primitive name = Bool (Sx_primitives.is_primitive (value_to_str name))\nlet get_primitive name = Sx_primitives.get_primitive (value_to_str name)\nlet is_spread v = match v with Spread _ -> Bool true | _ -> Bool false\n\n(* Stubs for functions defined in sx_ref.ml — resolved at link time *)\n(* These are forward-declared here; sx_ref.ml defines the actual implementations *)\n\n(* strip-prefix *)\n(* Stubs for evaluator functions — defined in sx_ref.ml but\n sometimes referenced before their definition via forward calls.\n These get overridden by the actual transpiled definitions. *)\n\nlet map_indexed fn coll =\n List (List.mapi (fun i x -> sx_call fn [Number (float_of_int i); x]) (sx_to_list coll))\n\nlet map_dict fn d =\n match d with\n | Dict tbl ->\n let result = Hashtbl.create (Hashtbl.length tbl) in\n Hashtbl.iter (fun k v -> Hashtbl.replace result k (sx_call fn [String k; v])) tbl;\n Dict result\n | _ -> raise (Eval_error \"map-dict: expected dict\")\n\nlet for_each fn coll =\n List.iter (fun x -> ignore (sx_call fn [x])) (sx_to_list coll);\n Nil\n\nlet for_each_indexed fn coll =\n List.iteri (fun i x -> ignore (sx_call fn [Number (float_of_int i); x])) (sx_to_list coll);\n Nil\n\n(* Continuation support *)\nlet continuation_p v = match v with Continuation (_, _) -> Bool true | _ -> Bool false\n\nlet make_cek_continuation captured rest_kont =\n let data = Hashtbl.create 2 in\n Hashtbl.replace data \"captured\" captured;\n Hashtbl.replace data \"rest-kont\" rest_kont;\n Continuation ((fun v -> v), Some data)\n\nlet continuation_data v = match v with\n | Continuation (_, Some d) -> Dict d\n | Continuation (_, None) -> Dict (Hashtbl.create 0)\n | _ -> raise (Eval_error \"not a continuation\")\n\n(* Dynamic wind — simplified for OCaml (no async) *)\nlet dynamic_wind_call before body after _env =\n ignore (sx_call before []);\n let result = sx_call body [] in\n ignore (sx_call after []);\n result\n\n(* Scope stack — all delegated to primitives registered in sx_server.ml *)\nlet scope_push name value = prim_call \"scope-push!\" [name; value]\nlet scope_pop name = prim_call \"scope-pop!\" [name]\nlet scope_peek name = prim_call \"scope-peek\" [name]\nlet scope_emit name value = prim_call \"scope-emit!\" [name; value]\nlet provide_push name value = prim_call \"scope-push!\" [name; value]\nlet provide_pop name = prim_call \"scope-pop!\" [name]\n\n(* Custom special forms registry — mutable dict *)\nlet custom_special_forms = Dict (Hashtbl.create 4)\n\n(* register-special-form! — add a handler to the custom registry *)\nlet register_special_form name handler =\n (match custom_special_forms with\n | Dict tbl -> Hashtbl.replace tbl (value_to_str name) handler; handler\n | _ -> raise (Eval_error \"custom_special_forms not a dict\"))\n\n(* Render check/fn hooks — nil by default, set by platform if needed *)\nlet render_check = Nil\nlet render_fn = Nil\n\n(* is-else-clause? — check if a cond/case test is an else marker *)\nlet is_else_clause v =\n match v with\n | Keyword k -> Bool (k = \"else\" || k = \"default\")\n | Symbol s -> Bool (s = \"else\" || s = \"default\")\n | Bool true -> Bool true\n | _ -> Bool false\n\n(* Signal accessors *)\nlet signal_value s = match s with\n | Signal sig' -> sig'.s_value\n | Dict d -> (match Hashtbl.find_opt d \"value\" with Some v -> v | None -> Nil)\n | _ -> raise (Eval_error \"not a signal\")\nlet signal_set_value s v = match s with Signal sig' -> sig'.s_value <- v; v | _ -> raise (Eval_error \"not a signal\")\nlet signal_subscribers s = match s with Signal sig' -> List (List.map (fun _ -> Nil) sig'.s_subscribers) | _ -> List []\nlet signal_add_sub_b s f =\n match s with\n | Dict d ->\n (match Hashtbl.find_opt d \"subscribers\" with\n | Some (ListRef r) -> r := !r @ [f]; Nil\n | Some (List items) -> Hashtbl.replace d \"subscribers\" (ListRef (ref (items @ [f]))); Nil\n | _ -> Hashtbl.replace d \"subscribers\" (ListRef (ref [f])); Nil)\n | _ -> Nil\n\nlet signal_remove_sub_b s f =\n match s with\n | Dict d ->\n (match Hashtbl.find_opt d \"subscribers\" with\n | Some (ListRef r) -> r := List.filter (fun x -> x != f) !r; Nil\n | Some (List items) -> Hashtbl.replace d \"subscribers\" (List (List.filter (fun x -> x != f) items)); Nil\n | _ -> Nil)\n | _ -> Nil\n\nlet signal_deps s =\n match s with\n | Dict d -> (match Hashtbl.find_opt d \"deps\" with Some v -> v | None -> List [])\n | _ -> List []\n\nlet signal_set_deps s d =\n match s with\n | Dict tbl -> Hashtbl.replace tbl \"deps\" d; Nil\n | _ -> Nil\n\nlet notify_subscribers s =\n let subs = match s with\n | Dict d -> (match Hashtbl.find_opt d \"subscribers\" with\n | Some (ListRef { contents = items }) | Some (List items) -> items\n | _ -> [])\n | _ -> []\n in\n List.iter (fun f -> ignore (sx_call f [])) subs;\n Nil\n\nlet flush_subscribers _s = Nil\nlet dispose_computed _s = Nil\n\n(* Island scope stubs — accept both bare OCaml fns and NativeFn values\n from transpiled code (NativeFn wrapping for value-storable lambdas). *)\nlet with_island_scope _register_fn body_fn =\n match body_fn with\n | NativeFn (_, f) -> f []\n | _ -> Nil\nlet register_in_scope _dispose_fn = Nil\n\n(* Component type annotation stub *)\nlet component_set_param_types_b _comp _types = Nil\n\n(* Parse keyword args from a call — this is defined in evaluator.sx,\n the transpiled version will override this stub. *)\n(* Forward-reference stubs for evaluator functions used before definition *)\nlet parse_comp_params _params = List [List []; Nil; Bool false]\nlet parse_macro_params _params = List [List []; Nil]\n\nlet parse_keyword_args _raw_args _env =\n (* Stub — the real implementation is transpiled from evaluator.sx *)\n List [Dict (Hashtbl.create 0); List []]\n\n(* Make handler/query/action/page def stubs *)\nlet make_handler_def name params body _env = Dict (let d = Hashtbl.create 4 in Hashtbl.replace d \"type\" (String \"handler\"); Hashtbl.replace d \"name\" name; Hashtbl.replace d \"params\" params; Hashtbl.replace d \"body\" body; d)\nlet make_query_def name params body _env = make_handler_def name params body _env\nlet make_action_def name params body _env = make_handler_def name params body _env\nlet make_page_def name _opts = Dict (let d = Hashtbl.create 4 in Hashtbl.replace d \"type\" (String \"page\"); Hashtbl.replace d \"name\" name; d)\n\n(* sf-def* stubs — platform-specific def-forms, not in the SX spec *)\nlet sf_defhandler args env =\n let name = first args in let rest_args = rest args in\n make_handler_def name (first rest_args) (nth rest_args (Number 1.0)) env\nlet sf_defquery args env = sf_defhandler args env\nlet sf_defaction args env = sf_defhandler args env\nlet sf_defpage args _env =\n let name = first args in make_page_def name (rest args)\n\nlet strip_prefix s prefix =\n match s, prefix with\n | String s, String p ->\n let pl = String.length p in\n if String.length s >= pl && String.sub s 0 pl = p\n then String (String.sub s pl (String.length s - pl))\n else String s\n | _ -> s\n\n(* debug_log — no-op in production, used by CEK evaluator for component warnings *)\nlet debug_log _ _ = Nil\n\n(* mutable_list — mutable list for bytecode compiler pool entries *)\nlet mutable_list () = ListRef (ref [])\n\n","(* generated code 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sx_ref.ml — Auto-generated from SX spec by hosts/ocaml/bootstrap.py *)\n(* Do not edit — regenerate with: python3 hosts/ocaml/bootstrap.py *)\n\n[@@@warning \"-26-27\"]\n\nopen Sx_types\nopen Sx_runtime\n\n(* Trampoline — forward ref, resolved after eval_expr is defined. *)\nlet trampoline_fn : (value -> value) ref = ref (fun v -> v)\nlet trampoline v = !trampoline_fn v\n\n\n\n(* === Mutable state for strict mode === *)\n(* These are defined as top-level refs because the transpiler cannot handle\n global set! mutation (it creates local refs that shadow the global). *)\nlet _strict_ref = ref (Bool false)\nlet _prim_param_types_ref = ref Nil\n\n(* JIT call hook — cek_call checks this before CEK dispatch for named\n lambdas. Registered by sx_server.ml after compiler loads. Tests\n run with hook = None (pure CEK, no compilation dependency). *)\nlet jit_call_hook : (value -> value list -> value option) option ref = ref None\n\n(* Component trace — captures kont from last CEK error for diagnostics *)\nlet _last_error_kont : value ref = ref Nil\n\n\n\n(* === Transpiled from evaluator (frames + eval + CEK) === *)\n\n(* make-cek-state *)\nlet rec make_cek_state control env kont =\n (CekState { cs_control = control; cs_env = env; cs_kont = kont; cs_phase = \"eval\"; cs_value = Nil })\n\n(* make-cek-value *)\nand make_cek_value value env kont =\n (CekState { cs_control = Nil; cs_env = env; cs_kont = kont; cs_phase = \"continue\"; cs_value = value })\n\n(* cek-terminal? *)\nand cek_terminal_p state =\n (let _and = (prim_call \"=\" [(get (state) ((String \"phase\"))); (String \"continue\")]) in if not (sx_truthy _and) then _and else (empty_p ((get (state) ((String \"kont\"))))))\n\n(* cek-control *)\nand cek_control s =\n (get (s) ((String \"control\")))\n\n(* cek-env *)\nand cek_env s =\n (get (s) ((String \"env\")))\n\n(* cek-kont *)\nand cek_kont s =\n (get (s) ((String \"kont\")))\n\n(* cek-phase *)\nand cek_phase s =\n (get (s) ((String \"phase\")))\n\n(* cek-value *)\nand cek_value s =\n (get (s) ((String \"value\")))\n\n(* make-if-frame *)\nand make_if_frame then_expr else_expr env =\n (CekFrame { cf_type = \"if\"; cf_env = env; cf_name = else_expr; cf_body = then_expr; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-when-frame *)\nand make_when_frame body_exprs env =\n (CekFrame { cf_type = \"when\"; cf_env = env; cf_name = Nil; cf_body = body_exprs; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-begin-frame *)\nand make_begin_frame remaining env =\n (CekFrame { cf_type = \"begin\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-let-frame *)\nand make_let_frame name remaining body local =\n (CekFrame { cf_type = \"let\"; cf_env = local; cf_name = name; cf_body = body; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-define-frame *)\nand make_define_frame name env has_effects effect_list =\n (CekFrame { cf_type = \"define\"; cf_env = env; cf_name = name; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = has_effects; cf_extra2 = effect_list })\n\n(* make-set-frame *)\nand make_set_frame name env =\n (CekFrame { cf_type = \"set\"; cf_env = env; cf_name = name; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-arg-frame *)\nand make_arg_frame f evaled remaining env raw_args head_name =\n (CekFrame { cf_type = \"arg\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = evaled; cf_results = raw_args; cf_extra = (let _or = head_name in if sx_truthy _or then _or else Nil); cf_extra2 = Nil })\n\n(* make-call-frame *)\nand make_call_frame f args env =\n (CekFrame { cf_type = \"call\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = f; cf_args = args; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-cond-frame *)\nand make_cond_frame remaining env scheme_p =\n (CekFrame { cf_type = \"cond\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = scheme_p; cf_extra2 = Nil })\n\n(* make-case-frame *)\nand make_case_frame match_val remaining env =\n (CekFrame { cf_type = \"case\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = match_val; cf_extra2 = Nil })\n\n(* make-thread-frame *)\nand make_thread_frame remaining env =\n (CekFrame { cf_type = \"thread\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-map-frame *)\nand make_map_frame f remaining results env =\n (CekFrame { cf_type = \"map\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = Nil; cf_results = results; cf_extra = (Bool false); cf_extra2 = Nil })\n\n(* make-map-indexed-frame *)\nand make_map_indexed_frame f remaining results env =\n (CekFrame { cf_type = \"map\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = Nil; cf_results = results; cf_extra = (Bool true); cf_extra2 = Nil })\n\n(* make-filter-frame *)\nand make_filter_frame f remaining results current_item env =\n (CekFrame { cf_type = \"filter\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = Nil; cf_results = results; cf_extra = current_item; cf_extra2 = Nil })\n\n(* make-reduce-frame *)\nand make_reduce_frame f remaining env =\n (CekFrame { cf_type = \"reduce\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-for-each-frame *)\nand make_for_each_frame f remaining env =\n (CekFrame { cf_type = \"for-each\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-some-frame *)\nand make_some_frame f remaining env =\n (CekFrame { cf_type = \"some\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-every-frame *)\nand make_every_frame f remaining env =\n (CekFrame { cf_type = \"every\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = f; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-scope-frame *)\nand make_scope_frame name remaining env =\n (CekFrame { cf_type = \"scope\"; cf_env = env; cf_name = name; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-provide-frame *)\nand make_provide_frame name value remaining env =\n (CekFrame { cf_type = \"provide\"; cf_env = env; cf_name = name; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = value; cf_extra2 = Nil })\n\n(* make-scope-acc-frame *)\nand make_scope_acc_frame name value remaining env =\n (CekFrame { cf_type = \"scope-acc\"; cf_env = env; cf_name = name; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = (let _or = value in if sx_truthy _or then _or else Nil); cf_extra2 = (List []) })\n\n(* make-reset-frame *)\nand make_reset_frame env =\n (CekFrame { cf_type = \"reset\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-dict-frame *)\nand make_dict_frame remaining results env =\n (CekFrame { cf_type = \"dict\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = results; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-and-frame *)\nand make_and_frame remaining env =\n (CekFrame { cf_type = \"and\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-or-frame *)\nand make_or_frame remaining env =\n (CekFrame { cf_type = \"or\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-dynamic-wind-frame *)\nand make_dynamic_wind_frame phase body_thunk after_thunk env =\n (CekFrame { cf_type = \"dynamic-wind\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = phase; cf_extra2 = Nil })\n\n(* make-reactive-reset-frame *)\nand make_reactive_reset_frame env update_fn first_render_p =\n (CekFrame { cf_type = \"reactive-reset\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = update_fn; cf_extra2 = first_render_p })\n\n(* make-deref-frame *)\nand make_deref_frame env =\n (CekFrame { cf_type = \"deref\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-ho-setup-frame *)\nand make_ho_setup_frame ho_type remaining_args evaled_args env =\n (CekFrame { cf_type = \"ho-setup\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining_args; cf_f = Nil; cf_args = evaled_args; cf_results = Nil; cf_extra = ho_type; cf_extra2 = Nil })\n\n(* make-comp-trace-frame *)\nand make_comp_trace_frame name file =\n (CekFrame { cf_type = \"comp-trace\"; cf_env = file; cf_name = name; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* kont-collect-comp-trace *)\nand kont_collect_comp_trace kont =\n (if sx_truthy ((empty_p (kont))) then (List []) else (let frame = (first (kont)) in (if sx_truthy ((prim_call \"=\" [(frame_type (frame)); (String \"comp-trace\")])) then (cons ((let _d = Hashtbl.create 2 in Hashtbl.replace _d \"file\" (get (frame) ((String \"file\"))); Hashtbl.replace _d \"name\" (get (frame) ((String \"name\"))); Dict _d)) ((kont_collect_comp_trace ((rest (kont)))))) else (kont_collect_comp_trace ((rest (kont)))))))\n\n(* make-handler-frame *)\nand make_handler_frame handlers remaining env =\n (CekFrame { cf_type = \"handler\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = handlers; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-restart-frame *)\nand make_restart_frame restarts remaining env =\n (CekFrame { cf_type = \"restart\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = remaining; cf_f = restarts; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* make-signal-return-frame *)\nand make_signal_return_frame env saved_kont =\n (CekFrame { cf_type = \"signal-return\"; cf_env = env; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = saved_kont; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })\n\n(* find-matching-handler *)\nand find_matching_handler handlers condition =\n (if sx_truthy ((empty_p (handlers))) then Nil else (let pair = (first (handlers)) in (let pred = (first (pair)) in let handler_fn = (nth (pair) ((Number 1.0))) in (if sx_truthy ((cek_call (pred) ((List [condition])))) then handler_fn else (find_matching_handler ((rest (handlers))) (condition))))))\n\n(* kont-find-handler *)\nand kont_find_handler kont condition =\n (if sx_truthy ((empty_p (kont))) then Nil else (let frame = (first (kont)) in (if sx_truthy ((prim_call \"=\" [(frame_type (frame)); (String \"handler\")])) then (let match' = (find_matching_handler ((get (frame) ((String \"f\")))) (condition)) in (if sx_truthy ((is_nil (match'))) then (kont_find_handler ((rest (kont))) (condition)) else match')) else (kont_find_handler ((rest (kont))) (condition)))))\n\n(* find-named-restart *)\nand find_named_restart restarts name =\n (if sx_truthy ((empty_p (restarts))) then Nil else (let entry = (first (restarts)) in (if sx_truthy ((prim_call \"=\" [(first (entry)); name])) then entry else (find_named_restart ((rest (restarts))) (name)))))\n\n(* kont-find-restart *)\nand kont_find_restart kont name =\n (if sx_truthy ((empty_p (kont))) then Nil else (let frame = (first (kont)) in (if sx_truthy ((prim_call \"=\" [(frame_type (frame)); (String \"restart\")])) then (let match' = (find_named_restart ((get (frame) ((String \"f\")))) (name)) in (if sx_truthy ((is_nil (match'))) then (kont_find_restart ((rest (kont))) (name)) else (List [match'; frame; (rest (kont))]))) else (kont_find_restart ((rest (kont))) (name)))))\n\n(* frame-type *)\nand frame_type f =\n (get (f) ((String \"type\")))\n\n(* kont-push *)\nand kont_push frame kont =\n (cons (frame) (kont))\n\n(* kont-top *)\nand kont_top kont =\n (first (kont))\n\n(* kont-pop *)\nand kont_pop kont =\n (rest (kont))\n\n(* kont-empty? *)\nand kont_empty_p kont =\n (empty_p (kont))\n\n(* kont-capture-to-reset *)\nand kont_capture_to_reset kont =\n (let rec scan = (fun k captured -> (if sx_truthy ((empty_p (k))) then (raise (Eval_error (value_to_str (String \"shift without enclosing reset\")))) else (let frame = (first (k)) in (if sx_truthy ((let _or = (prim_call \"=\" [(frame_type (frame)); (String \"reset\")]) in if sx_truthy _or then _or else (prim_call \"=\" [(frame_type (frame)); (String \"reactive-reset\")]))) then (List [captured; (rest (k))]) else (scan ((rest (k))) ((prim_call \"append\" [captured; (List [frame])]))))))) in (scan (kont) ((List []))))\n\n(* kont-find-provide *)\nand kont_find_provide kont name =\n (if sx_truthy ((empty_p (kont))) then Nil else (let frame = (first (kont)) in (if sx_truthy ((let _and = (prim_call \"=\" [(frame_type (frame)); (String \"provide\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(get (frame) ((String \"name\"))); name]))) then frame else (kont_find_provide ((rest (kont))) (name)))))\n\n(* kont-find-scope-acc *)\nand kont_find_scope_acc kont name =\n (if sx_truthy ((empty_p (kont))) then Nil else (let frame = (first (kont)) in (if sx_truthy ((let _and = (prim_call \"=\" [(frame_type (frame)); (String \"scope-acc\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(get (frame) ((String \"name\"))); name]))) then frame else (kont_find_scope_acc ((rest (kont))) (name)))))\n\n(* has-reactive-reset-frame? *)\nand has_reactive_reset_frame_p kont =\n (if sx_truthy ((empty_p (kont))) then (Bool false) else (if sx_truthy ((prim_call \"=\" [(frame_type ((first (kont)))); (String \"reactive-reset\")])) then (Bool true) else (has_reactive_reset_frame_p ((rest (kont))))))\n\n(* kont-capture-to-reactive-reset *)\nand kont_capture_to_reactive_reset kont =\n (let rec scan = (fun k captured -> (if sx_truthy ((empty_p (k))) then (raise (Eval_error (value_to_str (String \"reactive deref without enclosing reactive-reset\")))) else (let frame = (first (k)) in (if sx_truthy ((prim_call \"=\" [(frame_type (frame)); (String \"reactive-reset\")])) then (List [captured; frame; (rest (k))]) else (scan ((rest (k))) ((prim_call \"append\" [captured; (List [frame])]))))))) in (scan (kont) ((List []))))\n\n(* *custom-special-forms* *)\nand custom_special_forms =\n (Dict (Hashtbl.create 0))\n\n(* register-special-form! *)\nand register_special_form name handler =\n (sx_dict_set_b custom_special_forms name handler)\n\n(* *render-check* *)\nand render_check =\n Nil\n\n(* *render-fn* *)\nand render_fn =\n Nil\n\n(* *strict* *)\nand _strict_ = !_strict_ref\n\n(* set-strict! *)\nand set_strict_b val' =\n _strict_ref := val'; Nil\n\n(* *prim-param-types* *)\nand _prim_param_types_ = !_prim_param_types_ref\n\n(* set-prim-param-types! *)\nand set_prim_param_types_b types =\n _prim_param_types_ref := types; Nil\n\n(* value-matches-type? *)\nand value_matches_type_p val' expected_type =\n (if sx_truthy ((prim_call \"=\" [expected_type; (String \"any\")])) then (Bool true) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"number\")])) then (number_p (val')) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"string\")])) then (string_p (val')) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"boolean\")])) then (boolean_p (val')) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"nil\")])) then (is_nil (val')) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"list\")])) then (list_p (val')) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"dict\")])) then (dict_p (val')) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"lambda\")])) then (is_lambda (val')) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"symbol\")])) then (prim_call \"=\" [(type_of (val')); (String \"symbol\")]) else (if sx_truthy ((prim_call \"=\" [expected_type; (String \"keyword\")])) then (prim_call \"=\" [(type_of (val')); (String \"keyword\")]) else (if sx_truthy ((let _and = (string_p (expected_type)) in if not (sx_truthy _and) then _and else (prim_call \"ends-with?\" [expected_type; (String \"?\")]))) then (let _or = (is_nil (val')) in if sx_truthy _or then _or else (value_matches_type_p (val') ((prim_call \"slice\" [expected_type; (Number 0.0); (prim_call \"-\" [(prim_call \"string-length\" [expected_type]); (Number 1.0)])])))) else (Bool true))))))))))))\n\n(* strict-check-args *)\nand strict_check_args name args =\n (if sx_truthy ((let _and = !_strict_ref in if not (sx_truthy _and) then _and else !_prim_param_types_ref)) then (let spec = (get (!_prim_param_types_ref) (name)) in (if sx_truthy (spec) then (let positional = (get (spec) ((String \"positional\"))) in let rest_type = (get (spec) ((String \"rest-type\"))) in (let () = ignore ((if sx_truthy (positional) then (List.iter (fun pair -> ignore ((let idx = (first (pair)) in let param = (nth (pair) ((Number 1.0))) in let p_name = (first (param)) in let p_type = (nth (param) ((Number 1.0))) in (if sx_truthy ((prim_call \"<\" [idx; (len (args))])) then (let val' = (nth (args) (idx)) in (if sx_truthy ((Bool (not (sx_truthy ((value_matches_type_p (val') (p_type))))))) then (raise (Eval_error (value_to_str (String (sx_str [(String \"Type error: \"); name; (String \" expected \"); p_type; (String \" for param \"); p_name; (String \", got \"); (type_of (val')); (String \" (\"); (String (sx_str [val'])); (String \")\")]))))) else Nil)) else Nil)))) (sx_to_list (List (List.mapi (fun i p -> let i = Number (float_of_int i) in (List [i; p])) (sx_to_list positional)))); Nil) else Nil)) in (if sx_truthy ((let _and = rest_type in if not (sx_truthy _and) then _and else (prim_call \">\" [(len (args)); (len ((let _or = positional in if sx_truthy _or then _or else (List []))))]))) then (List.iter (fun pair -> ignore ((let idx = (first (pair)) in let val' = (nth (pair) ((Number 1.0))) in (if sx_truthy ((Bool (not (sx_truthy ((value_matches_type_p (val') (rest_type))))))) then (raise (Eval_error (value_to_str (String (sx_str [(String \"Type error: \"); name; (String \" expected \"); rest_type; (String \" for rest arg \"); idx; (String \", got \"); (type_of (val')); (String \" (\"); (String (sx_str [val'])); (String \")\")]))))) else Nil)))) (sx_to_list (List (List.mapi (fun i v -> let i = Number (float_of_int i) in (List [i; v])) (sx_to_list (prim_call \"slice\" [args; (len ((let _or = positional in if sx_truthy _or then _or else (List []))))]))))); Nil) else Nil))) else Nil)) else Nil)\n\n(* call-lambda *)\nand bind_lambda_params params args local =\n (* Check for &rest in param list *)\n let param_strs = sx_to_list params in\n let is_rest_marker = function String \"&rest\" | Symbol \"&rest\" -> true | _ -> false in\n let rec find_rest idx = function\n | [] -> None\n | x :: rest_name :: _ when is_rest_marker x -> Some (idx, rest_name)\n | _ :: tl -> find_rest (idx + 1) tl\n in\n match find_rest 0 param_strs with\n | Some (idx, rest_name) ->\n let positional = prim_call \"slice\" [params; Number 0.0; Number (float_of_int idx)] in\n let () = ignore (List.iter (fun pair -> ignore (env_bind local (sx_to_string (first pair)) (nth pair (Number 1.0)))) (sx_to_list (prim_call \"zip\" [positional; args])); Nil) in\n env_bind local (sx_to_string rest_name) (prim_call \"slice\" [args; Number (float_of_int idx)])\n | None ->\n let () = ignore (List.iter (fun pair -> ignore (env_bind local (sx_to_string (first pair)) (nth pair (Number 1.0)))) (sx_to_list (prim_call \"zip\" [params; args])); Nil) in\n let () = ignore (List.iter (fun p -> ignore (env_bind local (sx_to_string p) Nil)) (sx_to_list (prim_call \"slice\" [params; len args])); Nil) in\n Nil\n\nand has_rest_param params =\n let param_strs = sx_to_list params in\n List.exists (function String \"&rest\" | Symbol \"&rest\" -> true | _ -> false) param_strs\n\nand call_lambda f args caller_env =\n (let params = (lambda_params (f)) in let local = (env_merge ((lambda_closure (f))) (caller_env)) in\n if has_rest_param params then\n let () = ignore (bind_lambda_params params args local) in\n make_thunk (lambda_body f) local\n else\n (if sx_truthy ((prim_call \">\" [(len (args)); (len (params))])) then (raise (Eval_error (value_to_str (String (sx_str [(let _or = (lambda_name (f)) in if sx_truthy _or then _or else (String \"lambda\")); (String \" expects \"); (len (params)); (String \" args, got \"); (len (args))]))))) else (let () = ignore ((List.iter (fun pair -> ignore ((env_bind local (sx_to_string (first (pair))) (nth (pair) ((Number 1.0)))))) (sx_to_list (prim_call \"zip\" [params; args])); Nil)) in (let () = ignore ((List.iter (fun p -> ignore ((env_bind local (sx_to_string p) Nil))) (sx_to_list (prim_call \"slice\" [params; (len (args))])); Nil)) in (make_thunk ((lambda_body (f))) (local))))))\n\n(* call-component *)\nand call_component comp raw_args env =\n (let parsed = (parse_keyword_args (raw_args) (env)) in let kwargs = (first (parsed)) in let children = (nth (parsed) ((Number 1.0))) in let local = (env_merge ((component_closure (comp))) (env)) in (let () = ignore ((List.iter (fun p -> ignore ((env_bind local (sx_to_string p) (let _or = (dict_get (kwargs) (p)) in if sx_truthy _or then _or else Nil)))) (sx_to_list (component_params (comp))); Nil)) in (let () = ignore ((if sx_truthy ((component_has_children (comp))) then (env_bind local (sx_to_string (String \"children\")) children) else Nil)) in (make_thunk ((component_body (comp))) (local)))))\n\n(* parse-keyword-args *)\nand parse_keyword_args raw_args env =\n (let kwargs = (Dict (Hashtbl.create 0)) in let children = ref ((List [])) in let i = (Number 0.0) in (let () = ignore ((List.fold_left (fun state arg -> (let idx = (get (state) ((String \"i\"))) in let skip = (get (state) ((String \"skip\"))) in (if sx_truthy (skip) then (prim_call \"assoc\" [state; (String \"skip\"); (Bool false); (String \"i\"); (prim_call \"inc\" [idx])]) else (if sx_truthy ((let _and = (prim_call \"=\" [(type_of (arg)); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"<\" [(prim_call \"inc\" [idx]); (len (raw_args))]))) then (let () = ignore ((sx_dict_set_b kwargs (keyword_name (arg)) (trampoline ((eval_expr ((nth (raw_args) ((prim_call \"inc\" [idx])))) (env)))))) in (prim_call \"assoc\" [state; (String \"skip\"); (Bool true); (String \"i\"); (prim_call \"inc\" [idx])])) else (let () = ignore ((children := sx_append_b !children (trampoline ((eval_expr (arg) (env)))); Nil)) in (prim_call \"assoc\" [state; (String \"i\"); (prim_call \"inc\" [idx])])))))) (let _d = Hashtbl.create 2 in Hashtbl.replace _d (value_to_str (String \"i\")) (Number 0.0); Hashtbl.replace _d (value_to_str (String \"skip\")) (Bool false); Dict _d) (sx_to_list raw_args))) in (List [kwargs; !children])))\n\n(* cond-scheme? *)\nand cond_scheme_p clauses =\n (Bool (List.for_all (fun c -> sx_truthy ((let _and = (prim_call \"=\" [(type_of (c)); (String \"list\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(len (c)); (Number 2.0)])))) (sx_to_list clauses)))\n\n(* is-else-clause? *)\nand is_else_clause test =\n (let _or = (let _and = (prim_call \"=\" [(type_of (test)); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name (test)); (String \"else\")])) in if sx_truthy _or then _or else (let _and = (prim_call \"=\" [(type_of (test)); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (let _or = (prim_call \"=\" [(symbol_name (test)); (String \"else\")]) in if sx_truthy _or then _or else (prim_call \"=\" [(symbol_name (test)); (String \":else\")]))))\n\n(* sf-named-let *)\nand sf_named_let args env =\n (let loop_name = (symbol_name ((first (args)))) in let bindings = (nth (args) ((Number 1.0))) in let body = (prim_call \"slice\" [args; (Number 2.0)]) in let params = ref ((List [])) in let inits = ref ((List [])) in (let () = ignore ((if sx_truthy ((let _and = (prim_call \"=\" [(type_of ((first (bindings)))); (String \"list\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(len ((first (bindings)))); (Number 2.0)]))) then (List.iter (fun binding -> ignore ((let () = ignore ((params := sx_append_b !params (if sx_truthy ((prim_call \"=\" [(type_of ((first (binding)))); (String \"symbol\")])) then (symbol_name ((first (binding)))) else (first (binding))); Nil)) in (inits := sx_append_b !inits (nth (binding) ((Number 1.0))); Nil)))) (sx_to_list bindings); Nil) else (List.fold_left (fun _acc pair_idx -> (let () = ignore ((params := sx_append_b !params (if sx_truthy ((prim_call \"=\" [(type_of ((nth (bindings) ((prim_call \"*\" [pair_idx; (Number 2.0)]))))); (String \"symbol\")])) then (symbol_name ((nth (bindings) ((prim_call \"*\" [pair_idx; (Number 2.0)]))))) else (nth (bindings) ((prim_call \"*\" [pair_idx; (Number 2.0)])))); Nil)) in (inits := sx_append_b !inits (nth (bindings) ((prim_call \"inc\" [(prim_call \"*\" [pair_idx; (Number 2.0)])]))); Nil))) Nil (sx_to_list (prim_call \"range\" [(Number 0.0); (prim_call \"/\" [(len (bindings)); (Number 2.0)])]))))) in (let loop_body = (if sx_truthy ((prim_call \"=\" [(len (body)); (Number 1.0)])) then (first (body)) else (cons ((make_symbol ((String \"begin\")))) (body))) in let loop_fn = (make_lambda (!params) (loop_body) (env)) in (let () = ignore ((set_lambda_name loop_fn (sx_to_string loop_name))) in (let () = ignore ((env_bind (lambda_closure (loop_fn)) (sx_to_string loop_name) loop_fn)) in (let init_vals = (List (List.map (fun e -> (trampoline ((eval_expr (e) (env))))) (sx_to_list !inits))) in (trampoline (call_lambda (loop_fn) (init_vals) (env)))))))))\n\n(* sf-lambda *)\nand sf_lambda args env =\n (let params_expr = (first (args)) in let body_exprs = (rest (args)) in let body = (if sx_truthy ((prim_call \"=\" [(len (body_exprs)); (Number 1.0)])) then (first (body_exprs)) else (cons ((make_symbol ((String \"begin\")))) (body_exprs))) in let param_names = (List (List.map (fun p -> (if sx_truthy ((prim_call \"=\" [(type_of (p)); (String \"symbol\")])) then (symbol_name (p)) else (if sx_truthy ((let _and = (prim_call \"=\" [(type_of (p)); (String \"list\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(len (p)); (Number 3.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((nth (p) ((Number 1.0))))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name ((nth (p) ((Number 1.0))))); (String \"as\")]))))) then (symbol_name ((first (p)))) else p))) (sx_to_list params_expr))) in (make_lambda (param_names) (body) (env)))\n\n(* sf-defcomp *)\nand sf_defcomp args env =\n (let name_sym = (first (args)) in let params_raw = (nth (args) ((Number 1.0))) in let body = (last (args)) in let comp_name = (strip_prefix ((symbol_name (name_sym))) ((String \"~\"))) in let parsed = (parse_comp_params (params_raw)) in let params = (first (parsed)) in let has_children = (nth (parsed) ((Number 1.0))) in let param_types = (nth (parsed) ((Number 2.0))) in let affinity = (defcomp_kwarg (args) ((String \"affinity\")) ((String \"auto\"))) in (let comp = (make_component (comp_name) (params) (has_children) (body) (env) (affinity)) in let effects = (defcomp_kwarg (args) ((String \"effects\")) (Nil)) in (let () = ignore ((if sx_truthy ((let _and = (Bool (not (sx_truthy ((is_nil (param_types)))))) in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((empty_p ((prim_call \"keys\" [param_types]))))))))) then (component_set_param_types_b (comp) (param_types)) else Nil)) in (let () = ignore ((if sx_truthy ((Bool (not (sx_truthy ((is_nil (effects))))))) then (let effect_list = (if sx_truthy ((prim_call \"=\" [(type_of (effects)); (String \"list\")])) then (List (List.map (fun e -> (if sx_truthy ((prim_call \"=\" [(type_of (e)); (String \"symbol\")])) then (symbol_name (e)) else (String (sx_str [e])))) (sx_to_list effects))) else (List [(String (sx_str [effects]))])) in let effect_anns = (if sx_truthy ((env_has (env) ((String \"*effect-annotations*\")))) then (env_get (env) ((String \"*effect-annotations*\"))) else (Dict (Hashtbl.create 0))) in (let () = ignore ((sx_dict_set_b effect_anns (symbol_name (name_sym)) effect_list)) in (env_bind env (sx_to_string (String \"*effect-annotations*\")) effect_anns))) else Nil)) in (let () = ignore ((if sx_truthy ((env_has (env) ((String \"*current-file*\")))) then (component_set_file_b (comp) ((env_get (env) ((String \"*current-file*\"))))) else Nil)) in (let () = ignore ((env_bind env (sx_to_string (symbol_name (name_sym))) comp)) in comp))))))\n\n(* defcomp-kwarg *)\nand defcomp_kwarg args key default =\n (let end' = (prim_call \"-\" [(len (args)); (Number 1.0)]) in let result' = ref (default) in (let () = ignore ((List.iter (fun i -> ignore ((if sx_truthy ((let _and = (prim_call \"=\" [(type_of ((nth (args) (i)))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(keyword_name ((nth (args) (i)))); key]) in if not (sx_truthy _and) then _and else (prim_call \"<\" [(prim_call \"+\" [i; (Number 1.0)]); end'])))) then (let val' = (nth (args) ((prim_call \"+\" [i; (Number 1.0)]))) in (result' := (if sx_truthy ((prim_call \"=\" [(type_of (val')); (String \"keyword\")])) then (keyword_name (val')) else val'); Nil)) else Nil))) (sx_to_list (prim_call \"range\" [(Number 2.0); end'; (Number 1.0)])); Nil)) in !result'))\n\n(* parse-comp-params *)\nand parse_comp_params params_expr =\n (let params = ref ((List [])) in let param_types = (Dict (Hashtbl.create 0)) in let has_children = ref ((Bool false)) in let in_key = ref ((Bool false)) in (let () = ignore ((List.iter (fun p -> ignore ((if sx_truthy ((let _and = (prim_call \"=\" [(type_of (p)); (String \"list\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(len (p)); (Number 3.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (p)))); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((nth (p) ((Number 1.0))))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name ((nth (p) ((Number 1.0))))); (String \"as\")])))))) then (let name = (symbol_name ((first (p)))) in let ptype = (nth (p) ((Number 2.0))) in (let type_val = (if sx_truthy ((prim_call \"=\" [(type_of (ptype)); (String \"symbol\")])) then (symbol_name (ptype)) else ptype) in (if sx_truthy ((Bool (not (sx_truthy (!has_children))))) then (let () = ignore ((params := sx_append_b !params name; Nil)) in (sx_dict_set_b param_types name type_val)) else Nil))) else (if sx_truthy ((prim_call \"=\" [(type_of (p)); (String \"symbol\")])) then (let name = (symbol_name (p)) in (if sx_truthy ((prim_call \"=\" [name; (String \"&key\")])) then (in_key := (Bool true); Nil) else (if sx_truthy ((prim_call \"=\" [name; (String \"&rest\")])) then (has_children := (Bool true); Nil) else (if sx_truthy ((prim_call \"=\" [name; (String \"&children\")])) then (has_children := (Bool true); Nil) else (if sx_truthy (!has_children) then Nil else (if sx_truthy (!in_key) then (params := sx_append_b !params name; Nil) else (params := sx_append_b !params name; Nil))))))) else Nil)))) (sx_to_list params_expr); Nil)) in (List [!params; !has_children; param_types])))\n\n(* sf-defisland *)\nand sf_defisland args env =\n (let name_sym = (first (args)) in let params_raw = (nth (args) ((Number 1.0))) in let body_exprs = (prim_call \"slice\" [args; (Number 2.0)]) in let body = (if sx_truthy ((prim_call \"=\" [(len (body_exprs)); (Number 1.0)])) then (first (body_exprs)) else (cons ((make_symbol ((String \"begin\")))) (body_exprs))) in let comp_name = (strip_prefix ((symbol_name (name_sym))) ((String \"~\"))) in let parsed = (parse_comp_params (params_raw)) in let params = (first (parsed)) in let has_children = (nth (parsed) ((Number 1.0))) in (let island = (make_island (comp_name) (params) (has_children) (body) (env)) in (let () = ignore ((if sx_truthy ((env_has (env) ((String \"*current-file*\")))) then (component_set_file_b (island) ((env_get (env) ((String \"*current-file*\"))))) else Nil)) in (let () = ignore ((env_bind env (sx_to_string (symbol_name (name_sym))) island)) in island))))\n\n(* sf-defmacro *)\nand sf_defmacro args env =\n (let name_sym = (first (args)) in let params_raw = (nth (args) ((Number 1.0))) in let body = (nth (args) ((Number 2.0))) in let parsed = (parse_macro_params (params_raw)) in let params = (first (parsed)) in let rest_param = (nth (parsed) ((Number 1.0))) in (let mac = (make_macro (params) (rest_param) (body) (env) ((symbol_name (name_sym)))) in (let () = ignore ((env_bind env (sx_to_string (symbol_name (name_sym))) mac)) in mac)))\n\n(* parse-macro-params *)\nand parse_macro_params params_expr =\n (let params = ref ((List [])) in let rest_param = ref (Nil) in (let () = ignore ((List.fold_left (fun state p -> (if sx_truthy ((let _and = (prim_call \"=\" [(type_of (p)); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(symbol_name (p)); (String \"&rest\")]))) then (prim_call \"assoc\" [state; (String \"in-rest\"); (Bool true)]) else (if sx_truthy ((get (state) ((String \"in-rest\")))) then (let () = ignore ((rest_param := (if sx_truthy ((prim_call \"=\" [(type_of (p)); (String \"symbol\")])) then (symbol_name (p)) else p); Nil)) in state) else (let () = ignore ((params := sx_append_b !params (if sx_truthy ((prim_call \"=\" [(type_of (p)); (String \"symbol\")])) then (symbol_name (p)) else p); Nil)) in state)))) (let _d = Hashtbl.create 1 in Hashtbl.replace _d (value_to_str (String \"in-rest\")) (Bool false); Dict _d) (sx_to_list params_expr))) in (List [!params; !rest_param])))\n\n(* qq-expand *)\nand qq_expand template env =\n (if sx_truthy ((Bool (not (sx_truthy ((prim_call \"=\" [(type_of (template)); (String \"list\")])))))) then template else (if sx_truthy ((empty_p (template))) then (List []) else (let head = (first (template)) in (if sx_truthy ((let _and = (prim_call \"=\" [(type_of (head)); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(symbol_name (head)); (String \"unquote\")]))) then (trampoline ((eval_expr ((nth (template) ((Number 1.0)))) (env)))) else (List.fold_left (fun result' item -> (if sx_truthy ((let _and = (prim_call \"=\" [(type_of (item)); (String \"list\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(len (item)); (Number 2.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (item)))); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(symbol_name ((first (item)))); (String \"splice-unquote\")]))))) then (let spliced = (trampoline ((eval_expr ((nth (item) ((Number 1.0)))) (env)))) in (if sx_truthy ((prim_call \"=\" [(type_of (spliced)); (String \"list\")])) then (prim_call \"concat\" [result'; spliced]) else (if sx_truthy ((is_nil (spliced))) then result' else (prim_call \"concat\" [result'; (List [spliced])])))) else (prim_call \"concat\" [result'; (List [(qq_expand (item) (env))])]))) (List []) (sx_to_list template))))))\n\n(* sf-letrec *)\nand sf_letrec args env =\n (let bindings = (first (args)) in let body = (rest (args)) in let local = (env_extend (env)) in let names = ref ((List [])) in let val_exprs = ref ((List [])) in (let () = ignore ((if sx_truthy ((let _and = (prim_call \"=\" [(type_of ((first (bindings)))); (String \"list\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(len ((first (bindings)))); (Number 2.0)]))) then (List.iter (fun binding -> ignore ((let vname = (if sx_truthy ((prim_call \"=\" [(type_of ((first (binding)))); (String \"symbol\")])) then (symbol_name ((first (binding)))) else (first (binding))) in (let () = ignore ((names := sx_append_b !names vname; Nil)) in (let () = ignore ((val_exprs := sx_append_b !val_exprs (nth (binding) ((Number 1.0))); Nil)) in (env_bind local (sx_to_string vname) Nil)))))) (sx_to_list bindings); Nil) else (List.fold_left (fun _acc pair_idx -> (let vname = (if sx_truthy ((prim_call \"=\" [(type_of ((nth (bindings) ((prim_call \"*\" [pair_idx; (Number 2.0)]))))); (String \"symbol\")])) then (symbol_name ((nth (bindings) ((prim_call \"*\" [pair_idx; (Number 2.0)]))))) else (nth (bindings) ((prim_call \"*\" [pair_idx; (Number 2.0)])))) in let val_expr = (nth (bindings) ((prim_call \"inc\" [(prim_call \"*\" [pair_idx; (Number 2.0)])]))) in (let () = ignore ((names := sx_append_b !names vname; Nil)) in (let () = ignore ((val_exprs := sx_append_b !val_exprs val_expr; Nil)) in (env_bind local (sx_to_string vname) Nil))))) Nil (sx_to_list (prim_call \"range\" [(Number 0.0); (prim_call \"/\" [(len (bindings)); (Number 2.0)])]))))) in (let () = ignore ((let values = (List (List.map (fun e -> (trampoline ((eval_expr (e) (local))))) (sx_to_list !val_exprs))) in (let () = ignore ((List.iter (fun pair -> ignore ((env_bind local (sx_to_string (first (pair))) (nth (pair) ((Number 1.0)))))) (sx_to_list (prim_call \"zip\" [!names; values])); Nil)) in (List.iter (fun val' -> ignore ((if sx_truthy ((is_lambda (val'))) then (List.iter (fun n -> ignore ((env_bind (lambda_closure (val')) (sx_to_string n) (env_get (local) (n))))) (sx_to_list !names); Nil) else Nil))) (sx_to_list values); Nil)))) in (let () = ignore ((List.iter (fun e -> ignore ((trampoline ((eval_expr (e) (local)))))) (sx_to_list (prim_call \"slice\" [body; (Number 0.0); (prim_call \"dec\" [(len (body))])])); Nil)) in (make_thunk ((last (body))) (local))))))\n\n(* step-sf-letrec *)\nand step_sf_letrec args env kont =\n (let thk = (sf_letrec (args) (env)) in (make_cek_state ((thunk_expr (thk))) ((thunk_env (thk))) (kont)))\n\n(* sf-dynamic-wind *)\nand sf_dynamic_wind args env =\n (let before = (trampoline ((eval_expr ((first (args))) (env)))) in let body = (trampoline ((eval_expr ((nth (args) ((Number 1.0)))) (env)))) in let after = (trampoline ((eval_expr ((nth (args) ((Number 2.0)))) (env)))) in (dynamic_wind_call (before) (body) (after) (env)))\n\n(* sf-scope *)\nand sf_scope args env =\n (let name = (trampoline ((eval_expr ((first (args))) (env)))) in let rest = (prim_call \"slice\" [args; (Number 1.0)]) in let val' = ref (Nil) in let body_exprs = ref (Nil) in (let () = ignore ((if sx_truthy ((let _and = (prim_call \">=\" [(len (rest)); (Number 2.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (rest)))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name ((first (rest)))); (String \"value\")])))) then (let () = ignore ((val' := (trampoline ((eval_expr ((nth (rest) ((Number 1.0)))) (env)))); Nil)) in (body_exprs := (prim_call \"slice\" [rest; (Number 2.0)]); Nil)) else (body_exprs := rest; Nil))) in (let () = ignore ((scope_push (name) (!val'))) in (let result' = ref (Nil) in (let () = ignore ((List.iter (fun e -> ignore ((result' := (trampoline ((eval_expr (e) (env)))); Nil))) (sx_to_list !body_exprs); Nil)) in (let () = ignore ((scope_pop (name))) in !result'))))))\n\n(* sf-provide *)\nand sf_provide args env =\n (let name = (trampoline ((eval_expr ((first (args))) (env)))) in let val' = (trampoline ((eval_expr ((nth (args) ((Number 1.0)))) (env)))) in let body_exprs = (prim_call \"slice\" [args; (Number 2.0)]) in let result' = ref (Nil) in (let () = ignore ((scope_push (name) (val'))) in (let () = ignore ((List.iter (fun e -> ignore ((result' := (trampoline ((eval_expr (e) (env)))); Nil))) (sx_to_list body_exprs); Nil)) in (let () = ignore ((scope_pop (name))) in !result'))))\n\n(* expand-macro *)\nand expand_macro mac raw_args env =\n (let local = (env_merge ((macro_closure (mac))) (env)) in (let () = ignore ((List.iter (fun pair -> ignore ((env_bind local (sx_to_string (first (pair))) (if sx_truthy ((prim_call \"<\" [(nth (pair) ((Number 1.0))); (len (raw_args))])) then (nth (raw_args) ((nth (pair) ((Number 1.0))))) else Nil)))) (sx_to_list (List (List.mapi (fun i p -> let i = Number (float_of_int i) in (List [p; i])) (sx_to_list (macro_params (mac)))))); Nil)) in (let () = ignore ((if sx_truthy ((macro_rest_param (mac))) then (env_bind local (sx_to_string (macro_rest_param (mac))) (prim_call \"slice\" [raw_args; (len ((macro_params (mac))))])) else Nil)) in (trampoline ((eval_expr ((macro_body (mac))) (local)))))))\n\n(* cek-run — iterative to avoid OCaml/WASM stack overflow *)\nand cek_run state =\n let s = ref state in\n (try\n while not (sx_truthy (cek_terminal_p !s)) do\n s := cek_step !s\n done;\n cek_value !s\n with Eval_error msg ->\n (if !_last_error_kont = Nil then _last_error_kont := cek_kont !s);\n raise (Eval_error msg))\n\n(* cek-step *)\nand cek_step state =\n (if sx_truthy ((prim_call \"=\" [(cek_phase (state)); (String \"eval\")])) then (step_eval (state)) else (step_continue (state)))\n\n(* step-eval *)\nand step_eval state =\n (let expr = (cek_control (state)) in let env = (cek_env (state)) in let kont = (cek_kont (state)) in (let _match_val = (type_of (expr)) in (if _match_val = (String \"number\") then (make_cek_value (expr) (env) (kont)) else (if _match_val = (String \"string\") then (make_cek_value (expr) (env) (kont)) else (if _match_val = (String \"boolean\") then (make_cek_value (expr) (env) (kont)) else (if _match_val = (String \"nil\") then (make_cek_value (Nil) (env) (kont)) else (if _match_val = (String \"symbol\") then (let name = (symbol_name (expr)) in (let val' = (if sx_truthy ((env_has (env) (name))) then (env_get (env) (name)) else (if sx_truthy ((is_primitive (name))) then (get_primitive (name)) else (if sx_truthy ((prim_call \"=\" [name; (String \"true\")])) then (Bool true) else (if sx_truthy ((prim_call \"=\" [name; (String \"false\")])) then (Bool false) else (if sx_truthy ((prim_call \"=\" [name; (String \"nil\")])) then Nil else (raise (Eval_error (value_to_str (String (sx_str [(String \"Undefined symbol: \"); name])))))))))) in (let () = ignore ((if sx_truthy ((let _and = (is_nil (val')) in if not (sx_truthy _and) then _and else (prim_call \"starts-with?\" [name; (String \"~\")]))) then (debug_log ((String \"Component not found:\")) (name)) else Nil)) in (make_cek_value (val') (env) (kont))))) else (if _match_val = (String \"keyword\") then (make_cek_value ((keyword_name (expr))) (env) (kont)) else (if _match_val = (String \"dict\") then (let ks = (prim_call \"keys\" [expr]) in (if sx_truthy ((empty_p (ks))) then (make_cek_value ((Dict (Hashtbl.create 0))) (env) (kont)) else (let first_key = (first (ks)) in let remaining_entries = ref ((List [])) in (let () = ignore ((List.iter (fun k -> ignore ((remaining_entries := sx_append_b !remaining_entries (List [k; (get (expr) (k))]); Nil))) (sx_to_list (rest (ks))); Nil)) in (make_cek_state ((get (expr) (first_key))) (env) ((kont_push ((make_dict_frame (!remaining_entries) ((List [(List [first_key])])) (env))) (kont)))))))) else (if _match_val = (String \"list\") then (if sx_truthy ((empty_p (expr))) then (make_cek_value ((List [])) (env) (kont)) else (step_eval_list (expr) (env) (kont))) else (make_cek_value (expr) (env) (kont))))))))))))\n\n(* step-eval-list *)\nand step_eval_list expr env kont =\n (let head = (first (expr)) in let args = (rest (expr)) in (if sx_truthy ((Bool (not (sx_truthy ((let _or = (prim_call \"=\" [(type_of (head)); (String \"symbol\")]) in if sx_truthy _or then _or else (let _or = (prim_call \"=\" [(type_of (head)); (String \"lambda\")]) in if sx_truthy _or then _or else (prim_call \"=\" [(type_of (head)); (String \"list\")])))))))) then (if sx_truthy ((empty_p (expr))) then (make_cek_value ((List [])) (env) (kont)) else (make_cek_state ((first (expr))) (env) ((kont_push ((make_map_frame (Nil) ((rest (expr))) ((List [])) (env))) (kont))))) else (if sx_truthy ((prim_call \"=\" [(type_of (head)); (String \"symbol\")])) then (let name = (symbol_name (head)) in (if sx_truthy ((prim_call \"=\" [name; (String \"if\")])) then (step_sf_if (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"when\")])) then (step_sf_when (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"cond\")])) then (step_sf_cond (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"case\")])) then (step_sf_case (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"and\")])) then (step_sf_and (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"or\")])) then (step_sf_or (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"let\")])) then (step_sf_let (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"let*\")])) then (step_sf_let (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"lambda\")])) then (step_sf_lambda (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"fn\")])) then (step_sf_lambda (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"define\")])) then (step_sf_define (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"defcomp\")])) then (make_cek_value ((sf_defcomp (args) (env))) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"defisland\")])) then (make_cek_value ((sf_defisland (args) (env))) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"defmacro\")])) then (make_cek_value ((sf_defmacro (args) (env))) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"begin\")])) then (step_sf_begin (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"do\")])) then (step_sf_begin (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"quote\")])) then (make_cek_value ((if sx_truthy ((empty_p (args))) then Nil else (first (args)))) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"quasiquote\")])) then (make_cek_value ((qq_expand ((first (args))) (env))) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"->\")])) then (step_sf_thread_first (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"set!\")])) then (step_sf_set_b (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"letrec\")])) then (step_sf_letrec (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"reset\")])) then (step_sf_reset (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"shift\")])) then (step_sf_shift (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"deref\")])) then (step_sf_deref (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"scope\")])) then (step_sf_scope (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"provide\")])) then (step_sf_provide (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"context\")])) then (step_sf_context (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"emit!\")])) then (step_sf_emit (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"emitted\")])) then (step_sf_emitted (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"handler-bind\")])) then (step_sf_handler_bind (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"restart-case\")])) then (step_sf_restart_case (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"signal-condition\")])) then (step_sf_signal (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"invoke-restart\")])) then (step_sf_invoke_restart (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"match\")])) then (step_sf_match (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"dynamic-wind\")])) then (make_cek_value ((sf_dynamic_wind (args) (env))) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"map\")])) then (step_ho_map (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"map-indexed\")])) then (step_ho_map_indexed (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"filter\")])) then (step_ho_filter (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"reduce\")])) then (step_ho_reduce (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"some\")])) then (step_ho_some (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"every?\")])) then (step_ho_every (args) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [name; (String \"for-each\")])) then (step_ho_for_each (args) (env) (kont)) else (if sx_truthy ((prim_call \"has-key?\" [custom_special_forms; name])) then (make_cek_value ((cek_call ((get (custom_special_forms) (name))) (List [args; env]))) (env) (kont)) else (if sx_truthy ((let _and = (env_has (env) (name)) in if not (sx_truthy _and) then _and else (is_macro ((env_get (env) (name)))))) then (let mac = (env_get (env) (name)) in (make_cek_state ((expand_macro (mac) (args) (env))) (env) (kont))) else (if sx_truthy ((let _and = render_check in if not (sx_truthy _and) then _and else (cek_call (render_check) (List [expr; env])))) then (make_cek_value ((cek_call (render_fn) (List [expr; env]))) (env) (kont)) else (step_eval_call (head) (args) (env) (kont)))))))))))))))))))))))))))))))))))))))))))))))) else (step_eval_call (head) (args) (env) (kont)))))\n\n(* match-find-clause *)\nand match_find_clause val' clauses env =\n (if sx_truthy ((empty_p (clauses))) then Nil else (let clause = (first (clauses)) in let pattern = (first (clause)) in let body = (nth (clause) ((Number 1.0))) in let local = (env_extend (env)) in (if sx_truthy ((match_pattern (pattern) (val') (local))) then (List [local; body]) else (match_find_clause (val') ((rest (clauses))) (env)))))\n\n(* match-pattern *)\nand match_pattern pattern value env =\n (if sx_truthy ((prim_call \"=\" [pattern; (Symbol \"_\")])) then (Bool true) else (if sx_truthy ((let _and = (list_p (pattern)) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(len (pattern)); (Number 2.0)]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(first (pattern)); (Symbol \"?\")])))) then (let pred = (trampoline ((eval_expr ((nth (pattern) ((Number 1.0)))) (env)))) in (cek_call (pred) ((List [value])))) else (if sx_truthy ((let _and = (list_p (pattern)) in if not (sx_truthy _and) then _and else (let _and = (Bool (not (sx_truthy ((empty_p (pattern)))))) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(first (pattern)); (Symbol \"quote\")])))) then (prim_call \"=\" [value; (nth (pattern) ((Number 1.0)))]) else (if sx_truthy ((symbol_p (pattern))) then (let () = ignore ((env_bind env (sx_to_string (symbol_name (pattern))) value)) in (Bool true)) else (if sx_truthy ((let _and = (list_p (pattern)) in if not (sx_truthy _and) then _and else (list_p (value)))) then (if sx_truthy ((Bool (not (sx_truthy ((prim_call \"=\" [(len (pattern)); (len (value))])))))) then (Bool false) else (let pairs = (prim_call \"zip\" [pattern; value]) in (Bool (List.for_all (fun pair -> sx_truthy ((match_pattern ((first (pair))) ((nth (pair) ((Number 1.0)))) (env)))) (sx_to_list pairs))))) else (prim_call \"=\" [pattern; value]))))))\n\n(* step-sf-match *)\nand step_sf_match args env kont =\n (let val' = (trampoline ((eval_expr ((first (args))) (env)))) in let clauses = (rest (args)) in (let result' = (match_find_clause (val') (clauses) (env)) in (if sx_truthy ((is_nil (result'))) then (raise (Eval_error (value_to_str (String (sx_str [(String \"match: no clause matched \"); (inspect (val'))]))))) else (make_cek_state ((nth (result') ((Number 1.0)))) ((first (result'))) (kont)))))\n\n(* step-sf-handler-bind *)\nand step_sf_handler_bind args env kont =\n (let handler_specs = (first (args)) in let body = (rest (args)) in let handlers = (List (List.map (fun spec -> (List [(trampoline ((eval_expr ((first (spec))) (env)))); (trampoline ((eval_expr ((nth (spec) ((Number 1.0)))) (env))))])) (sx_to_list handler_specs))) in (if sx_truthy ((empty_p (body))) then (make_cek_value (Nil) (env) (kont)) else (make_cek_state ((first (body))) (env) ((kont_push ((make_handler_frame (handlers) ((rest (body))) (env))) (kont))))))\n\n(* step-sf-restart-case *)\nand step_sf_restart_case args env kont =\n (let body = (first (args)) in let restart_specs = (rest (args)) in let restarts = (List (List.map (fun spec -> (List [(if sx_truthy ((symbol_p ((first (spec))))) then (symbol_name ((first (spec)))) else (first (spec))); (nth (spec) ((Number 1.0))); (nth (spec) ((Number 2.0)))])) (sx_to_list restart_specs))) in (make_cek_state (body) (env) ((kont_push ((make_restart_frame (restarts) ((List [])) (env))) (kont)))))\n\n(* step-sf-signal *)\nand step_sf_signal args env kont =\n (let condition = (trampoline ((eval_expr ((first (args))) (env)))) in let handler_fn = (kont_find_handler (kont) (condition)) in (if sx_truthy ((is_nil (handler_fn))) then (raise (Eval_error (value_to_str (String (sx_str [(String \"Unhandled condition: \"); (inspect (condition))]))))) else (continue_with_call (handler_fn) ((List [condition])) (env) ((List [condition])) ((kont_push ((make_signal_return_frame (env) (kont))) (kont))))))\n\n(* step-sf-invoke-restart *)\nand step_sf_invoke_restart args env kont =\n (let restart_name = (let rn = (if sx_truthy ((symbol_p ((first (args))))) then (symbol_name ((first (args)))) else (trampoline ((eval_expr ((first (args))) (env))))) in (if sx_truthy ((symbol_p (rn))) then (symbol_name (rn)) else rn)) in let restart_arg = (if sx_truthy ((prim_call \">=\" [(len (args)); (Number 2.0)])) then (trampoline ((eval_expr ((nth (args) ((Number 1.0)))) (env)))) else Nil) in let found = (kont_find_restart (kont) (restart_name)) in (if sx_truthy ((is_nil (found))) then (raise (Eval_error (value_to_str (String (sx_str [(String \"No restart named: \"); (inspect (restart_name))]))))) else (let entry = (first (found)) in let restart_frame = (nth (found) ((Number 1.0))) in let rest_kont = (nth (found) ((Number 2.0))) in (let params = (nth (entry) ((Number 1.0))) in let body = (nth (entry) ((Number 2.0))) in let restart_env = (env_extend ((get (restart_frame) ((String \"env\"))))) in (let () = ignore ((if sx_truthy ((Bool (not (sx_truthy ((empty_p (params))))))) then (env_bind restart_env (sx_to_string (first (params))) restart_arg) else Nil)) in (make_cek_state (body) (restart_env) (rest_kont)))))))\n\n(* step-sf-if *)\nand step_sf_if args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_if_frame ((nth (args) ((Number 1.0)))) ((if sx_truthy ((prim_call \">\" [(len (args)); (Number 2.0)])) then (nth (args) ((Number 2.0))) else Nil)) (env))) (kont))))\n\n(* step-sf-when *)\nand step_sf_when args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_when_frame ((rest (args))) (env))) (kont))))\n\n(* step-sf-begin *)\nand step_sf_begin args env kont =\n (if sx_truthy ((empty_p (args))) then (make_cek_value (Nil) (env) (kont)) else (if sx_truthy ((prim_call \"=\" [(len (args)); (Number 1.0)])) then (make_cek_state ((first (args))) (env) (kont)) else (make_cek_state ((first (args))) (env) ((kont_push ((make_begin_frame ((rest (args))) (env))) (kont))))))\n\n(* step-sf-let *)\nand step_sf_let args env kont =\n let pairs = ref Nil in (if sx_truthy ((prim_call \"=\" [(type_of ((first (args)))); (String \"symbol\")])) then (make_cek_value ((sf_named_let (args) (env))) (env) (kont)) else (let bindings = (first (args)) in let body = (rest (args)) in let local = (env_extend (env)) in (if sx_truthy ((empty_p (bindings))) then (step_sf_begin (body) (local) (kont)) else (let first_binding = (if sx_truthy ((let _and = (prim_call \"=\" [(type_of ((first (bindings)))); (String \"list\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(len ((first (bindings)))); (Number 2.0)]))) then (first (bindings)) else (List [(first (bindings)); (nth (bindings) ((Number 1.0)))])) in let rest_bindings = (if sx_truthy ((let _and = (prim_call \"=\" [(type_of ((first (bindings)))); (String \"list\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(len ((first (bindings)))); (Number 2.0)]))) then (rest (bindings)) else (let pairs = ref ((List [])) in (let () = ignore ((List.fold_left (fun _acc i -> (pairs := sx_append_b !pairs (List [(nth (bindings) ((prim_call \"*\" [i; (Number 2.0)]))); (nth (bindings) ((prim_call \"inc\" [(prim_call \"*\" [i; (Number 2.0)])])))]); Nil)) Nil (sx_to_list (prim_call \"range\" [(Number 1.0); (prim_call \"/\" [(len (bindings)); (Number 2.0)])])))) in !pairs))) in (let vname = (if sx_truthy ((prim_call \"=\" [(type_of ((first (first_binding)))); (String \"symbol\")])) then (symbol_name ((first (first_binding)))) else (first (first_binding))) in (make_cek_state ((nth (first_binding) ((Number 1.0)))) (local) ((kont_push ((make_let_frame (vname) (rest_bindings) (body) (local))) (kont)))))))))\n\n(* step-sf-define *)\nand step_sf_define args env kont =\n (let name_sym = (first (args)) in let has_effects = (let _and = (prim_call \">=\" [(len (args)); (Number 4.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((nth (args) ((Number 1.0))))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name ((nth (args) ((Number 1.0))))); (String \"effects\")]))) in let val_idx = (if sx_truthy ((let _and = (prim_call \">=\" [(len (args)); (Number 4.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((nth (args) ((Number 1.0))))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name ((nth (args) ((Number 1.0))))); (String \"effects\")])))) then (Number 3.0) else (Number 1.0)) in let effect_list = (if sx_truthy ((let _and = (prim_call \">=\" [(len (args)); (Number 4.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((nth (args) ((Number 1.0))))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name ((nth (args) ((Number 1.0))))); (String \"effects\")])))) then (nth (args) ((Number 2.0))) else Nil) in (make_cek_state ((nth (args) (val_idx))) (env) ((kont_push ((make_define_frame ((symbol_name (name_sym))) (env) (has_effects) (effect_list))) (kont)))))\n\n(* step-sf-set! *)\nand step_sf_set_b args env kont =\n (make_cek_state ((nth (args) ((Number 1.0)))) (env) ((kont_push ((make_set_frame ((symbol_name ((first (args))))) (env))) (kont))))\n\n(* step-sf-and *)\nand step_sf_and args env kont =\n (if sx_truthy ((empty_p (args))) then (make_cek_value ((Bool true)) (env) (kont)) else (make_cek_state ((first (args))) (env) ((kont_push ((make_and_frame ((rest (args))) (env))) (kont)))))\n\n(* step-sf-or *)\nand step_sf_or args env kont =\n (if sx_truthy ((empty_p (args))) then (make_cek_value ((Bool false)) (env) (kont)) else (make_cek_state ((first (args))) (env) ((kont_push ((make_or_frame ((rest (args))) (env))) (kont)))))\n\n(* step-sf-cond *)\nand step_sf_cond args env kont =\n (let scheme_p = (cond_scheme_p (args)) in (if sx_truthy (scheme_p) then (if sx_truthy ((empty_p (args))) then (make_cek_value (Nil) (env) (kont)) else (let clause = (first (args)) in let test = (first (clause)) in (if sx_truthy ((is_else_clause (test))) then (make_cek_state ((nth (clause) ((Number 1.0)))) (env) (kont)) else (make_cek_state (test) (env) ((kont_push ((make_cond_frame (args) (env) ((Bool true)))) (kont))))))) else (if sx_truthy ((prim_call \"<\" [(len (args)); (Number 2.0)])) then (make_cek_value (Nil) (env) (kont)) else (let test = (first (args)) in (if sx_truthy ((is_else_clause (test))) then (make_cek_state ((nth (args) ((Number 1.0)))) (env) (kont)) else (make_cek_state (test) (env) ((kont_push ((make_cond_frame (args) (env) ((Bool false)))) (kont)))))))))\n\n(* step-sf-case *)\nand step_sf_case args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_case_frame (Nil) ((rest (args))) (env))) (kont))))\n\n(* step-sf-thread-first *)\nand step_sf_thread_first args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_thread_frame ((rest (args))) (env))) (kont))))\n\n(* step-sf-lambda *)\nand step_sf_lambda args env kont =\n (make_cek_value ((sf_lambda (args) (env))) (env) (kont))\n\n(* step-sf-scope *)\nand step_sf_scope args env kont =\n (let name = (trampoline ((eval_expr ((first (args))) (env)))) in let rest_args = (prim_call \"slice\" [args; (Number 1.0)]) in let val' = ref (Nil) in let body = ref (Nil) in (let () = ignore ((if sx_truthy ((let _and = (prim_call \">=\" [(len (rest_args)); (Number 2.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (rest_args)))); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name ((first (rest_args)))); (String \"value\")])))) then (let () = ignore ((val' := (trampoline ((eval_expr ((nth (rest_args) ((Number 1.0)))) (env)))); Nil)) in (body := (prim_call \"slice\" [rest_args; (Number 2.0)]); Nil)) else (body := rest_args; Nil))) in (if sx_truthy ((empty_p (!body))) then (make_cek_value (Nil) (env) (kont)) else (make_cek_state ((first (!body))) (env) ((kont_push ((make_scope_acc_frame (name) (!val') ((rest (!body))) (env))) (kont)))))))\n\n(* step-sf-provide *)\nand step_sf_provide args env kont =\n (let name = (trampoline ((eval_expr ((first (args))) (env)))) in let val' = (trampoline ((eval_expr ((nth (args) ((Number 1.0)))) (env)))) in let body = (prim_call \"slice\" [args; (Number 2.0)]) in (if sx_truthy ((empty_p (body))) then (make_cek_value (Nil) (env) (kont)) else (make_cek_state ((first (body))) (env) ((kont_push ((make_provide_frame (name) (val') ((rest (body))) (env))) (kont))))))\n\n(* step-sf-context — check kont provide frames first, then fall back to scope_stacks *)\nand step_sf_context args env kont =\n (let name = (trampoline ((eval_expr ((first (args))) (env)))) in let default_val = (if sx_truthy ((prim_call \">=\" [(len (args)); (Number 2.0)])) then (trampoline ((eval_expr ((nth (args) ((Number 1.0)))) (env)))) else Nil) in let frame = (kont_find_provide (kont) (name)) in (if sx_truthy ((Bool (not (sx_truthy ((is_nil (frame))))))) then (make_cek_value ((get (frame) ((String \"value\")))) (env) (kont)) else (let scope_val = (sx_context (name) (Nil)) in (make_cek_value ((if sx_truthy ((is_nil (scope_val))) then default_val else scope_val)) (env) (kont)))))\n\n(* step-sf-emit *)\nand step_sf_emit args env kont =\n (let name = (trampoline ((eval_expr ((first (args))) (env)))) in let val' = (trampoline ((eval_expr ((nth (args) ((Number 1.0)))) (env)))) in let frame = (kont_find_scope_acc (kont) (name)) in (let () = ignore ((if sx_truthy (frame) then (sx_dict_set_b frame (String \"emitted\") (prim_call \"append\" [(get (frame) ((String \"emitted\"))); (List [val'])])) else (* Fall back to env-bound scope-emit! when no CEK scope-acc frame *)\n (try match env_get env (String \"scope-emit!\") with\n | NativeFn (_, fn) -> ignore (fn [name; val']); Nil\n | _ -> Nil\n with _ -> Nil))) in (make_cek_value (Nil) (env) (kont))))\n\n(* step-sf-emitted *)\nand step_sf_emitted args env kont =\n (let name = (trampoline ((eval_expr ((first (args))) (env)))) in let frame = (kont_find_scope_acc (kont) (name)) in (if sx_truthy ((Bool (not (sx_truthy ((is_nil (frame))))))) then (make_cek_value ((get (frame) ((String \"emitted\")))) (env) (kont)) else (* Fall back to env-bound emitted when no CEK scope-acc frame *)\n (let result = try match env_get env (String \"emitted\") with\n | NativeFn (_, fn) -> fn [name]\n | _ -> List []\n with _ -> List [] in\n (make_cek_value (result) (env) (kont)))))\n\n(* step-sf-reset *)\nand step_sf_reset args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_reset_frame (env))) (kont))))\n\n(* step-sf-shift *)\nand step_sf_shift args env kont =\n (let k_name = (symbol_name ((first (args)))) in let body = (nth (args) ((Number 1.0))) in let captured_result = (kont_capture_to_reset (kont)) in let captured = (first (captured_result)) in let rest_kont = (nth (captured_result) ((Number 1.0))) in (let k = (make_cek_continuation (captured) (rest_kont)) in (let shift_env = (env_extend (env)) in (let () = ignore ((env_bind shift_env (sx_to_string k_name) k)) in (make_cek_state (body) (shift_env) (rest_kont))))))\n\n(* step-sf-deref *)\nand step_sf_deref args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_deref_frame (env))) (kont))))\n\n(* cek-call *)\nand cek_call f args =\n (let a = (if sx_truthy ((is_nil (args))) then (List []) else args) in (if sx_truthy ((is_nil (f))) then Nil else (if sx_truthy ((let _or = (is_lambda (f)) in if sx_truthy _or then _or else (is_callable (f)))) then (cek_run ((continue_with_call (f) (a) ((make_env ())) (a) ((List []))))) else Nil)))\n\n(* reactive-shift-deref *)\nand reactive_shift_deref sig' env kont =\n (let scan_result = (kont_capture_to_reactive_reset (kont)) in let captured_frames = (first (scan_result)) in let reset_frame = (nth (scan_result) ((Number 1.0))) in let remaining_kont = (nth (scan_result) ((Number 2.0))) in let update_fn = (get (reset_frame) ((String \"update-fn\"))) in (let sub_disposers = ref ((List [])) in (let subscriber = (NativeFn (\"\\206\\187\", fun _args -> (fun () -> let sub_disposers = ref Nil in (let () = ignore ((List.iter (fun d -> ignore ((cek_call (d) (Nil)))) (sx_to_list !sub_disposers); Nil)) in (let () = ignore ((sub_disposers := (List []); Nil)) in (let new_reset = (make_reactive_reset_frame (env) (update_fn) ((Bool false))) in let new_kont = (prim_call \"concat\" [captured_frames; (List [new_reset]); remaining_kont]) in (with_island_scope ((NativeFn (\"\\206\\187\", fun _args -> match _args with [d] -> (fun d -> let sub_disposers = ref Nil in (sub_disposers := sx_append_b !sub_disposers d; Nil)) d | _ -> Nil))) ((NativeFn (\"\\206\\187\", fun _args -> (fun () -> (cek_run ((make_cek_value ((signal_value (sig'))) (env) (new_kont))))) ())))))))) ())) in (let () = ignore ((signal_add_sub_b (sig') (subscriber))) in (let () = ignore ((register_in_scope ((NativeFn (\"\\206\\187\", fun _args -> (fun () -> (let () = ignore ((signal_remove_sub_b (sig') (subscriber))) in (List.iter (fun d -> ignore ((cek_call (d) (Nil)))) (sx_to_list !sub_disposers); Nil))) ()))))) in (let initial_kont = (prim_call \"concat\" [captured_frames; (List [reset_frame]); remaining_kont]) in (make_cek_value ((signal_value (sig'))) (env) (initial_kont))))))))\n\n(* step-eval-call *)\nand step_eval_call head args env kont =\n (let hname = (if sx_truthy ((prim_call \"=\" [(type_of (head)); (String \"symbol\")])) then (symbol_name (head)) else Nil) in (make_cek_state (head) (env) ((kont_push ((make_arg_frame (Nil) ((List [])) (args) (env) (args) (hname))) (kont)))))\n\n(* ho-form-name? *)\nand ho_form_name_p name =\n (let _or = (prim_call \"=\" [name; (String \"map\")]) in if sx_truthy _or then _or else (let _or = (prim_call \"=\" [name; (String \"map-indexed\")]) in if sx_truthy _or then _or else (let _or = (prim_call \"=\" [name; (String \"filter\")]) in if sx_truthy _or then _or else (let _or = (prim_call \"=\" [name; (String \"reduce\")]) in if sx_truthy _or then _or else (let _or = (prim_call \"=\" [name; (String \"some\")]) in if sx_truthy _or then _or else (let _or = (prim_call \"=\" [name; (String \"every?\")]) in if sx_truthy _or then _or else (prim_call \"=\" [name; (String \"for-each\")])))))))\n\n(* ho-fn? *)\nand ho_fn_p v =\n (let _or = (is_callable (v)) in if sx_truthy _or then _or else (is_lambda (v)))\n\n(* ho-swap-args *)\nand ho_swap_args ho_type evaled =\n (if sx_truthy ((prim_call \"=\" [ho_type; (String \"reduce\")])) then (let a = (first (evaled)) in let b = (nth (evaled) ((Number 1.0))) in (if sx_truthy ((let _and = (Bool (not (sx_truthy ((ho_fn_p (a)))))) in if not (sx_truthy _and) then _and else (ho_fn_p (b)))) then (List [b; (nth (evaled) ((Number 2.0))); a]) else evaled)) else (let a = (first (evaled)) in let b = (nth (evaled) ((Number 1.0))) in (if sx_truthy ((let _and = (Bool (not (sx_truthy ((ho_fn_p (a)))))) in if not (sx_truthy _and) then _and else (ho_fn_p (b)))) then (List [b; a]) else evaled)))\n\n(* ho-setup-dispatch *)\nand ho_setup_dispatch ho_type evaled env kont =\n (let ordered = (ho_swap_args (ho_type) (evaled)) in (let f = (first (ordered)) in (if sx_truthy ((prim_call \"=\" [ho_type; (String \"map\")])) then (let coll = (nth (ordered) ((Number 1.0))) in (if sx_truthy ((empty_p (coll))) then (make_cek_value ((List [])) (env) (kont)) else (continue_with_call (f) ((List [(first (coll))])) (env) ((List [])) ((kont_push ((make_map_frame (f) ((rest (coll))) ((List [])) (env))) (kont)))))) else (if sx_truthy ((prim_call \"=\" [ho_type; (String \"map-indexed\")])) then (let coll = (nth (ordered) ((Number 1.0))) in (if sx_truthy ((empty_p (coll))) then (make_cek_value ((List [])) (env) (kont)) else (continue_with_call (f) ((List [(Number 0.0); (first (coll))])) (env) ((List [])) ((kont_push ((make_map_indexed_frame (f) ((rest (coll))) ((List [])) (env))) (kont)))))) else (if sx_truthy ((prim_call \"=\" [ho_type; (String \"filter\")])) then (let coll = (nth (ordered) ((Number 1.0))) in (if sx_truthy ((empty_p (coll))) then (make_cek_value ((List [])) (env) (kont)) else (continue_with_call (f) ((List [(first (coll))])) (env) ((List [])) ((kont_push ((make_filter_frame (f) ((rest (coll))) ((List [])) ((first (coll))) (env))) (kont)))))) else (if sx_truthy ((prim_call \"=\" [ho_type; (String \"reduce\")])) then (let init = (nth (ordered) ((Number 1.0))) in let coll = (nth (ordered) ((Number 2.0))) in (if sx_truthy ((empty_p (coll))) then (make_cek_value (init) (env) (kont)) else (continue_with_call (f) ((List [init; (first (coll))])) (env) ((List [])) ((kont_push ((make_reduce_frame (f) ((rest (coll))) (env))) (kont)))))) else (if sx_truthy ((prim_call \"=\" [ho_type; (String \"some\")])) then (let coll = (nth (ordered) ((Number 1.0))) in (if sx_truthy ((empty_p (coll))) then (make_cek_value ((Bool false)) (env) (kont)) else (continue_with_call (f) ((List [(first (coll))])) (env) ((List [])) ((kont_push ((make_some_frame (f) ((rest (coll))) (env))) (kont)))))) else (if sx_truthy ((prim_call \"=\" [ho_type; (String \"every\")])) then (let coll = (nth (ordered) ((Number 1.0))) in (if sx_truthy ((empty_p (coll))) then (make_cek_value ((Bool true)) (env) (kont)) else (continue_with_call (f) ((List [(first (coll))])) (env) ((List [])) ((kont_push ((make_every_frame (f) ((rest (coll))) (env))) (kont)))))) else (if sx_truthy ((prim_call \"=\" [ho_type; (String \"for-each\")])) then (let coll = (nth (ordered) ((Number 1.0))) in (if sx_truthy ((empty_p (coll))) then (make_cek_value (Nil) (env) (kont)) else (continue_with_call (f) ((List [(first (coll))])) (env) ((List [])) ((kont_push ((make_for_each_frame (f) ((rest (coll))) (env))) (kont)))))) else (raise (Eval_error (value_to_str (String (sx_str [(String \"Unknown HO type: \"); ho_type]))))))))))))))\n\n(* step-ho-map *)\nand step_ho_map args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_ho_setup_frame ((String \"map\")) ((rest (args))) ((List [])) (env))) (kont))))\n\n(* step-ho-map-indexed *)\nand step_ho_map_indexed args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_ho_setup_frame ((String \"map-indexed\")) ((rest (args))) ((List [])) (env))) (kont))))\n\n(* step-ho-filter *)\nand step_ho_filter args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_ho_setup_frame ((String \"filter\")) ((rest (args))) ((List [])) (env))) (kont))))\n\n(* step-ho-reduce *)\nand step_ho_reduce args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_ho_setup_frame ((String \"reduce\")) ((rest (args))) ((List [])) (env))) (kont))))\n\n(* step-ho-some *)\nand step_ho_some args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_ho_setup_frame ((String \"some\")) ((rest (args))) ((List [])) (env))) (kont))))\n\n(* step-ho-every *)\nand step_ho_every args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_ho_setup_frame ((String \"every\")) ((rest (args))) ((List [])) (env))) (kont))))\n\n(* step-ho-for-each *)\nand step_ho_for_each args env kont =\n (make_cek_state ((first (args))) (env) ((kont_push ((make_ho_setup_frame ((String \"for-each\")) ((rest (args))) ((List [])) (env))) (kont))))\n\n(* step-continue *)\nand step_continue state =\n (let value = (cek_value (state)) in let env = (cek_env (state)) in let kont = (cek_kont (state)) in (if sx_truthy ((kont_empty_p (kont))) then state else (let frame = (kont_top (kont)) in let rest_k = (kont_pop (kont)) in let ft = (frame_type (frame)) in (if sx_truthy ((prim_call \"=\" [ft; (String \"if\")])) then (if sx_truthy ((let _and = value in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((is_nil (value)))))))) then (make_cek_state ((get (frame) ((String \"then\")))) ((get (frame) ((String \"env\")))) (rest_k)) else (if sx_truthy ((is_nil ((get (frame) ((String \"else\")))))) then (make_cek_value (Nil) (env) (rest_k)) else (make_cek_state ((get (frame) ((String \"else\")))) ((get (frame) ((String \"env\")))) (rest_k)))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"when\")])) then (if sx_truthy ((let _and = value in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((is_nil (value)))))))) then (let body = (get (frame) ((String \"body\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (body))) then (make_cek_value (Nil) (fenv) (rest_k)) else (if sx_truthy ((prim_call \"=\" [(len (body)); (Number 1.0)])) then (make_cek_state ((first (body))) (fenv) (rest_k)) else (make_cek_state ((first (body))) (fenv) ((kont_push ((make_begin_frame ((rest (body))) (fenv))) (rest_k))))))) else (make_cek_value (Nil) (env) (rest_k))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"begin\")])) then (let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (value) (fenv) (rest_k)) else (if sx_truthy ((prim_call \"=\" [(len (remaining)); (Number 1.0)])) then (make_cek_state ((first (remaining))) (fenv) (rest_k)) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((make_begin_frame ((rest (remaining))) (fenv))) (rest_k))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"let\")])) then (let name = (get (frame) ((String \"name\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let body = (get (frame) ((String \"body\"))) in let local = (get (frame) ((String \"env\"))) in (let () = ignore ((env_bind local (sx_to_string name) value)) in (if sx_truthy ((empty_p (remaining))) then (step_sf_begin (body) (local) (rest_k)) else (let next_binding = (first (remaining)) in let vname = (if sx_truthy ((prim_call \"=\" [(type_of ((first (next_binding)))); (String \"symbol\")])) then (symbol_name ((first (next_binding)))) else (first (next_binding))) in (make_cek_state ((nth (next_binding) ((Number 1.0)))) (local) ((kont_push ((make_let_frame (vname) ((rest (remaining))) (body) (local))) (rest_k)))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"define\")])) then (let name = (get (frame) ((String \"name\"))) in let fenv = (get (frame) ((String \"env\"))) in let has_effects = (get (frame) ((String \"has-effects\"))) in let effect_list = (get (frame) ((String \"effect-list\"))) in (let () = ignore ((if sx_truthy ((let _and = (is_lambda (value)) in if not (sx_truthy _and) then _and else (is_nil ((lambda_name (value)))))) then (set_lambda_name value (sx_to_string name)) else Nil)) in (let () = ignore ((env_bind fenv (sx_to_string name) value)) in (let () = ignore ((if sx_truthy (has_effects) then (let effect_names = (if sx_truthy ((prim_call \"=\" [(type_of (effect_list)); (String \"list\")])) then (List (List.map (fun e -> (if sx_truthy ((prim_call \"=\" [(type_of (e)); (String \"symbol\")])) then (symbol_name (e)) else (String (sx_str [e])))) (sx_to_list effect_list))) else (List [(String (sx_str [effect_list]))])) in let effect_anns = (if sx_truthy ((env_has (fenv) ((String \"*effect-annotations*\")))) then (env_get (fenv) ((String \"*effect-annotations*\"))) else (Dict (Hashtbl.create 0))) in (let () = ignore ((sx_dict_set_b effect_anns name effect_names)) in (env_bind fenv (sx_to_string (String \"*effect-annotations*\")) effect_anns))) else Nil)) in (make_cek_value (value) (fenv) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"set\")])) then (let name = (get (frame) ((String \"name\"))) in let fenv = (get (frame) ((String \"env\"))) in (let () = ignore ((env_set fenv (sx_to_string name) value)) in (make_cek_value (value) (env) (rest_k)))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"and\")])) then (if sx_truthy ((Bool (not (sx_truthy (value))))) then (make_cek_value (value) (env) (rest_k)) else (let remaining = (get (frame) ((String \"remaining\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (value) (env) (rest_k)) else (make_cek_state ((first (remaining))) ((get (frame) ((String \"env\")))) ((if sx_truthy ((prim_call \"=\" [(len (remaining)); (Number 1.0)])) then rest_k else (kont_push ((make_and_frame ((rest (remaining))) ((get (frame) ((String \"env\")))))) (rest_k)))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"or\")])) then (if sx_truthy (value) then (make_cek_value (value) (env) (rest_k)) else (let remaining = (get (frame) ((String \"remaining\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value ((Bool false)) (env) (rest_k)) else (make_cek_state ((first (remaining))) ((get (frame) ((String \"env\")))) ((if sx_truthy ((prim_call \"=\" [(len (remaining)); (Number 1.0)])) then rest_k else (kont_push ((make_or_frame ((rest (remaining))) ((get (frame) ((String \"env\")))))) (rest_k)))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"cond\")])) then (let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in let scheme_p = (get (frame) ((String \"scheme\"))) in (if sx_truthy (scheme_p) then (if sx_truthy (value) then (make_cek_state ((nth ((first (remaining))) ((Number 1.0)))) (fenv) (rest_k)) else (let next_clauses = (rest (remaining)) in (if sx_truthy ((empty_p (next_clauses))) then (make_cek_value (Nil) (fenv) (rest_k)) else (let next_clause = (first (next_clauses)) in let next_test = (first (next_clause)) in (if sx_truthy ((is_else_clause (next_test))) then (make_cek_state ((nth (next_clause) ((Number 1.0)))) (fenv) (rest_k)) else (make_cek_state (next_test) (fenv) ((kont_push ((make_cond_frame (next_clauses) (fenv) ((Bool true)))) (rest_k))))))))) else (if sx_truthy (value) then (make_cek_state ((nth (remaining) ((Number 1.0)))) (fenv) (rest_k)) else (let next = (prim_call \"slice\" [remaining; (Number 2.0)]) in (if sx_truthy ((prim_call \"<\" [(len (next)); (Number 2.0)])) then (make_cek_value (Nil) (fenv) (rest_k)) else (let next_test = (first (next)) in (if sx_truthy ((is_else_clause (next_test))) then (make_cek_state ((nth (next) ((Number 1.0)))) (fenv) (rest_k)) else (make_cek_state (next_test) (fenv) ((kont_push ((make_cond_frame (next) (fenv) ((Bool false)))) (rest_k))))))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"case\")])) then (let match_val = (get (frame) ((String \"match-val\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((is_nil (match_val))) then (sf_case_step_loop (value) (remaining) (fenv) (rest_k)) else (sf_case_step_loop (match_val) (remaining) (fenv) (rest_k)))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"thread\")])) then (let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (value) (fenv) (rest_k)) else (let form = (first (remaining)) in let rest_forms = (rest (remaining)) in let new_kont = (if sx_truthy ((empty_p ((rest (remaining))))) then rest_k else (kont_push ((make_thread_frame ((rest (remaining))) (fenv))) (rest_k))) in (if sx_truthy ((let _and = (prim_call \"=\" [(type_of (form)); (String \"list\")]) in if not (sx_truthy _and) then _and else (let _and = (Bool (not (sx_truthy ((empty_p (form)))))) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (form)))); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (ho_form_name_p ((symbol_name ((first (form)))))))))) then (make_cek_state ((cons ((first (form))) ((cons ((List [(Symbol \"quote\"); value])) ((rest (form))))))) (fenv) (new_kont)) else (let result' = (if sx_truthy ((prim_call \"=\" [(type_of (form)); (String \"list\")])) then (let f = (trampoline ((eval_expr ((first (form))) (fenv)))) in let rargs = (List (List.map (fun a -> (trampoline ((eval_expr (a) (fenv))))) (sx_to_list (rest (form))))) in let all_args = (cons (value) (rargs)) in (if sx_truthy ((let _and = (is_callable (f)) in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((is_lambda (f)))))))) then (sx_apply f all_args) else (if sx_truthy ((is_lambda (f))) then (trampoline ((call_lambda (f) (all_args) (fenv)))) else (raise (Eval_error (value_to_str (String (sx_str [(String \"-> form not callable: \"); (inspect (f))])))))))) else (let f = (trampoline ((eval_expr (form) (fenv)))) in (if sx_truthy ((let _and = (is_callable (f)) in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((is_lambda (f)))))))) then (cek_call (f) (List [value])) else (if sx_truthy ((is_lambda (f))) then (trampoline ((call_lambda (f) ((List [value])) (fenv)))) else (raise (Eval_error (value_to_str (String (sx_str [(String \"-> form not callable: \"); (inspect (f))]))))))))) in (if sx_truthy ((empty_p (rest_forms))) then (make_cek_value (result') (fenv) (rest_k)) else (make_cek_value (result') (fenv) ((kont_push ((make_thread_frame (rest_forms) (fenv))) (rest_k)))))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"arg\")])) then (let f = (get (frame) ((String \"f\"))) in let evaled = (get (frame) ((String \"evaled\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in let raw_args = (get (frame) ((String \"raw-args\"))) in let hname = (get (frame) ((String \"head-name\"))) in (if sx_truthy ((is_nil (f))) then (let () = ignore ((if sx_truthy ((let _and = !_strict_ref in if not (sx_truthy _and) then _and else hname)) then (strict_check_args (hname) ((List []))) else Nil)) in (if sx_truthy ((empty_p (remaining))) then (continue_with_call (value) ((List [])) (fenv) (raw_args) (rest_k)) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((make_arg_frame (value) ((List [])) ((rest (remaining))) (fenv) (raw_args) (hname))) (rest_k)))))) else (let new_evaled = (prim_call \"append\" [evaled; (List [value])]) in (if sx_truthy ((empty_p (remaining))) then (let () = ignore ((if sx_truthy ((let _and = !_strict_ref in if not (sx_truthy _and) then _and else hname)) then (strict_check_args (hname) (new_evaled)) else Nil)) in (continue_with_call (f) (new_evaled) (fenv) (raw_args) (rest_k))) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((make_arg_frame (f) (new_evaled) ((rest (remaining))) (fenv) (raw_args) (hname))) (rest_k)))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"dict\")])) then (let remaining = (get (frame) ((String \"remaining\"))) in let results = (get (frame) ((String \"results\"))) in let fenv = (get (frame) ((String \"env\"))) in (let last_result = (last (results)) in let completed = (prim_call \"append\" [(prim_call \"slice\" [results; (Number 0.0); (prim_call \"dec\" [(len (results))])]); (List [(List [(first (last_result)); value])])]) in (if sx_truthy ((empty_p (remaining))) then (let d = (Dict (Hashtbl.create 0)) in (let () = ignore ((List.iter (fun pair -> ignore ((sx_dict_set_b d (first (pair)) (nth (pair) ((Number 1.0)))))) (sx_to_list completed); Nil)) in (make_cek_value (d) (fenv) (rest_k)))) else (let next_entry = (first (remaining)) in (make_cek_state ((nth (next_entry) ((Number 1.0)))) (fenv) ((kont_push ((make_dict_frame ((rest (remaining))) ((prim_call \"append\" [completed; (List [(List [(first (next_entry))])])])) (fenv))) (rest_k)))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"ho-setup\")])) then (let ho_type = (get (frame) ((String \"ho-type\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let evaled = (prim_call \"append\" [(get (frame) ((String \"evaled\"))); (List [value])]) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (ho_setup_dispatch (ho_type) (evaled) (fenv) (rest_k)) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((make_ho_setup_frame (ho_type) ((rest (remaining))) (evaled) (fenv))) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"reset\")])) then (make_cek_value (value) (env) (rest_k)) else (if sx_truthy ((prim_call \"=\" [ft; (String \"deref\")])) then (let val' = value in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((Bool (not (sx_truthy ((is_signal (val'))))))) then (make_cek_value (val') (fenv) (rest_k)) else (if sx_truthy ((has_reactive_reset_frame_p (rest_k))) then (reactive_shift_deref (val') (fenv) (rest_k)) else (let () = ignore ((let ctx = (sx_context ((String \"sx-reactive\")) (Nil)) in (if sx_truthy (ctx) then (let dep_list = ref ((get (ctx) ((String \"deps\")))) in let notify_fn = (get (ctx) ((String \"notify\"))) in (if sx_truthy ((Bool (not (sx_truthy ((prim_call \"contains?\" [!dep_list; val'])))))) then (let () = ignore ((dep_list := sx_append_b !dep_list val'; Nil)) in (signal_add_sub_b (val') (notify_fn))) else Nil)) else Nil))) in (make_cek_value ((signal_value (val'))) (fenv) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"reactive-reset\")])) then (let update_fn = (get (frame) ((String \"update-fn\"))) in let first_p = (get (frame) ((String \"first-render\"))) in (let () = ignore ((if sx_truthy ((let _and = update_fn in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy (first_p)))))) then (cek_call (update_fn) ((List [value]))) else Nil)) in (make_cek_value (value) (env) (rest_k)))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"scope\")])) then (let name = (get (frame) ((String \"name\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (let () = ignore ((scope_pop (name))) in (make_cek_value (value) (fenv) (rest_k))) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((make_scope_frame (name) ((rest (remaining))) (fenv))) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"provide\")])) then (let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (value) (fenv) (rest_k)) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((make_provide_frame ((get (frame) ((String \"name\")))) ((get (frame) ((String \"value\")))) ((rest (remaining))) (fenv))) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"scope-acc\")])) then (let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (value) (fenv) (rest_k)) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((let new_frame = (make_scope_acc_frame ((get (frame) ((String \"name\")))) ((get (frame) ((String \"value\")))) ((rest (remaining))) (fenv)) in (let () = ignore ((sx_dict_set_b new_frame (String \"emitted\") (get (frame) ((String \"emitted\"))))) in new_frame))) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"map\")])) then (let f = (get (frame) ((String \"f\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let results = (get (frame) ((String \"results\"))) in let indexed = (get (frame) ((String \"indexed\"))) in let fenv = (get (frame) ((String \"env\"))) in (let new_results = (prim_call \"append\" [results; (List [value])]) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (new_results) (fenv) (rest_k)) else (let call_args = (if sx_truthy (indexed) then (List [(len (new_results)); (first (remaining))]) else (List [(first (remaining))])) in let next_frame = (if sx_truthy (indexed) then (make_map_indexed_frame (f) ((rest (remaining))) (new_results) (fenv)) else (make_map_frame (f) ((rest (remaining))) (new_results) (fenv))) in (continue_with_call (f) (call_args) (fenv) ((List [])) ((kont_push (next_frame) (rest_k)))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"filter\")])) then (let f = (get (frame) ((String \"f\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let results = (get (frame) ((String \"results\"))) in let current_item = (get (frame) ((String \"current-item\"))) in let fenv = (get (frame) ((String \"env\"))) in (let new_results = (if sx_truthy (value) then (prim_call \"append\" [results; (List [current_item])]) else results) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (new_results) (fenv) (rest_k)) else (continue_with_call (f) ((List [(first (remaining))])) (fenv) ((List [])) ((kont_push ((make_filter_frame (f) ((rest (remaining))) (new_results) ((first (remaining))) (fenv))) (rest_k))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"reduce\")])) then (let f = (get (frame) ((String \"f\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (value) (fenv) (rest_k)) else (continue_with_call (f) ((List [value; (first (remaining))])) (fenv) ((List [])) ((kont_push ((make_reduce_frame (f) ((rest (remaining))) (fenv))) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"for-each\")])) then (let f = (get (frame) ((String \"f\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (Nil) (fenv) (rest_k)) else (continue_with_call (f) ((List [(first (remaining))])) (fenv) ((List [])) ((kont_push ((make_for_each_frame (f) ((rest (remaining))) (fenv))) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"some\")])) then (let f = (get (frame) ((String \"f\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy (value) then (make_cek_value (value) (fenv) (rest_k)) else (if sx_truthy ((empty_p (remaining))) then (make_cek_value ((Bool false)) (fenv) (rest_k)) else (continue_with_call (f) ((List [(first (remaining))])) (fenv) ((List [])) ((kont_push ((make_some_frame (f) ((rest (remaining))) (fenv))) (rest_k))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"every\")])) then (let f = (get (frame) ((String \"f\"))) in let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((Bool (not (sx_truthy (value))))) then (make_cek_value ((Bool false)) (fenv) (rest_k)) else (if sx_truthy ((empty_p (remaining))) then (make_cek_value ((Bool true)) (fenv) (rest_k)) else (continue_with_call (f) ((List [(first (remaining))])) (fenv) ((List [])) ((kont_push ((make_every_frame (f) ((rest (remaining))) (fenv))) (rest_k))))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"handler\")])) then (let remaining = (get (frame) ((String \"remaining\"))) in let fenv = (get (frame) ((String \"env\"))) in (if sx_truthy ((empty_p (remaining))) then (make_cek_value (value) (fenv) (rest_k)) else (make_cek_state ((first (remaining))) (fenv) ((kont_push ((make_handler_frame ((get (frame) ((String \"f\")))) ((rest (remaining))) (fenv))) (rest_k)))))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"restart\")])) then (make_cek_value (value) (env) (rest_k)) else (if sx_truthy ((prim_call \"=\" [ft; (String \"signal-return\")])) then (let saved_kont = (get (frame) ((String \"f\"))) in (make_cek_value (value) ((get (frame) ((String \"env\")))) (saved_kont))) else (if sx_truthy ((prim_call \"=\" [ft; (String \"comp-trace\")])) then (make_cek_value (value) (env) (rest_k)) else (raise (Eval_error (value_to_str (String (sx_str [(String \"Unknown frame type: \"); ft]))))))))))))))))))))))))))))))))))))))\n\n(* continue-with-call *)\nand continue_with_call f args env raw_args kont =\n (if sx_truthy ((continuation_p (f))) then (let arg = (if sx_truthy ((empty_p (args))) then Nil else (first (args))) in let cont_data = (continuation_data (f)) in (let captured = (get (cont_data) ((String \"captured\"))) in (let result' = (cek_run ((make_cek_value (arg) (env) (captured)))) in (make_cek_value (result') (env) (kont))))) else (if sx_truthy ((let _and = (is_callable (f)) in if not (sx_truthy _and) then _and else (let _and = (Bool (not (sx_truthy ((is_lambda (f)))))) in if not (sx_truthy _and) then _and else (let _and = (Bool (not (sx_truthy ((is_component (f)))))) in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((is_island (f)))))))))) then (make_cek_value ((sx_apply f args)) (env) (kont)) else (if sx_truthy ((is_lambda (f))) then (let params = (lambda_params (f)) in let local = (env_merge ((lambda_closure (f))) (env)) in\n if has_rest_param params then\n let () = ignore (bind_lambda_params params args local) in\n (match !jit_call_hook, f with | Some hook, Lambda l when l.l_name <> None -> let args_list = match args with List a | ListRef { contents = a } -> a | _ -> [] in (match hook f args_list with Some result -> make_cek_value result local kont | None -> make_cek_state (lambda_body f) local kont) | _ -> make_cek_state (lambda_body f) local kont)\n else\n (if sx_truthy ((prim_call \">\" [(len (args)); (len (params))])) then (raise (Eval_error (value_to_str (String (sx_str [(let _or = (lambda_name (f)) in if sx_truthy _or then _or else (String \"lambda\")); (String \" expects \"); (len (params)); (String \" args, got \"); (len (args))]))))) else (let () = ignore ((List.iter (fun pair -> ignore ((env_bind local (sx_to_string (first (pair))) (nth (pair) ((Number 1.0)))))) (sx_to_list (prim_call \"zip\" [params; args])); Nil)) in (let () = ignore ((List.iter (fun p -> ignore ((env_bind local (sx_to_string p) Nil))) (sx_to_list (prim_call \"slice\" [params; (len (args))])); Nil)) in (match !jit_call_hook, f with | Some hook, Lambda l when l.l_name <> None -> let args_list = match args with List a | ListRef { contents = a } -> a | _ -> [] in (match hook f args_list with Some result -> make_cek_value result local kont | None -> make_cek_state (lambda_body f) local kont) | _ -> make_cek_state ((lambda_body (f))) (local) (kont)))))) else (if sx_truthy ((let _or = (is_component (f)) in if sx_truthy _or then _or else (is_island (f)))) then (let parsed = (parse_keyword_args (raw_args) (env)) in let kwargs = (first (parsed)) in let children = (nth (parsed) ((Number 1.0))) in let local = (env_merge ((component_closure (f))) (env)) in (let () = ignore ((List.iter (fun p -> ignore ((env_bind local (sx_to_string p) (let _or = (dict_get (kwargs) (p)) in if sx_truthy _or then _or else Nil)))) (sx_to_list (component_params (f))); Nil)) in (let () = ignore ((if sx_truthy ((component_has_children (f))) then (env_bind local (sx_to_string (String \"children\")) children) else Nil)) in (make_cek_state ((component_body (f))) (local) ((kont_push ((make_comp_trace_frame ((component_name (f))) ((component_file (f))))) (kont))))))) else (raise (Eval_error (value_to_str (String (sx_str [(String \"Not callable: \"); (inspect (f))])))))))))\n\n(* sf-case-step-loop *)\nand sf_case_step_loop match_val clauses env kont =\n (if sx_truthy ((prim_call \"<\" [(len (clauses)); (Number 2.0)])) then (make_cek_value (Nil) (env) (kont)) else (let test = (first (clauses)) in let body = (nth (clauses) ((Number 1.0))) in (if sx_truthy ((is_else_clause (test))) then (make_cek_state (body) (env) (kont)) else (let test_val = (trampoline ((eval_expr (test) (env)))) in (if sx_truthy ((prim_call \"=\" [match_val; test_val])) then (make_cek_state (body) (env) (kont)) else (sf_case_step_loop (match_val) ((prim_call \"slice\" [clauses; (Number 2.0)])) (env) (kont)))))))\n\n(* eval-expr-cek *)\nand eval_expr_cek expr env =\n (cek_run ((make_cek_state (expr) (env) ((List [])))))\n\n(* trampoline-cek *)\nand trampoline_cek val' =\n (if sx_truthy ((is_thunk (val'))) then (eval_expr_cek ((thunk_expr (val'))) ((thunk_env (val')))) else val')\n\n(* eval-expr *)\nand eval_expr expr env =\n (cek_run ((make_cek_state (expr) (env) ((List [])))))\n\n\n(* Wire up trampoline to resolve thunks via the CEK machine *)\nlet () = trampoline_fn := (fun v ->\n match v with\n | Thunk (expr, env) -> eval_expr expr (Env env)\n | _ -> v)\n\n(* Wire up the primitives trampoline so call_any in HO forms resolves Thunks *)\nlet () = Sx_primitives._sx_trampoline_fn := !trampoline_fn\n\n(* Collect component trace from a kont value *)\nlet collect_comp_trace kont =\n let trace = ref [] in\n let k = ref kont in\n while (match !k with List (_::_) -> true | _ -> false) do\n (match !k with\n | List (frame :: rest) ->\n (match frame with\n | CekFrame f when f.cf_type = \"comp-trace\" ->\n let name = match f.cf_name with String s -> s | _ -> \"?\" in\n let file = match f.cf_env with String s -> s | Nil -> \"\" | _ -> \"\" in\n trace := (name, file) :: !trace\n | Dict d when (match Hashtbl.find_opt d \"type\" with Some (String \"comp-trace\") -> true | _ -> false) ->\n let name = match Hashtbl.find_opt d \"name\" with Some (String s) -> s | _ -> \"?\" in\n let file = match Hashtbl.find_opt d \"file\" with Some (String s) -> s | _ -> \"\" in\n trace := (name, file) :: !trace\n | _ -> ());\n k := List rest\n | _ -> k := List [])\n done;\n List.rev !trace\n\n(* Format a comp-trace into a human-readable string *)\nlet format_comp_trace trace =\n match trace with\n | [] -> \"\"\n | entries ->\n let lines = List.mapi (fun i (name, file) ->\n let prefix = if i = 0 then \" in \" else \" called from \" in\n if file = \"\" then prefix ^ \"~\" ^ name\n else prefix ^ \"~\" ^ name ^ \" (\" ^ file ^ \")\"\n ) entries in\n \"\n\" ^ String.concat \"\n\" lines\n\n(* Enhance an error message with component trace *)\nlet enhance_error_with_trace msg =\n let trace = collect_comp_trace !_last_error_kont in\n _last_error_kont := Nil;\n msg ^ (format_comp_trace trace)\n\n\n\n","(* generated code 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SX bytecode VM — stack-based interpreter.\n\n Executes bytecode produced by compiler.sx.\n Designed for speed: array-based stack, direct dispatch,\n no allocation per step (unlike the CEK machine).\n\n This is the platform-native execution engine. The same bytecode\n runs on all platforms (OCaml, JS, WASM).\n\n VM types (vm_code, vm_upvalue_cell, vm_closure) are defined in\n sx_types.ml to share the mutual recursion block with [value]. *)\n\nopen Sx_types\n\n(** Call frame — one per function invocation. *)\ntype frame = {\n closure : vm_closure;\n mutable ip : int;\n base : int; (* base index in value stack for locals *)\n local_cells : (int, vm_upvalue_cell) Hashtbl.t; (* slot → shared cell for captured locals *)\n}\n\n(** VM state. *)\ntype vm = {\n mutable stack : value array;\n mutable sp : int;\n mutable frames : frame list;\n globals : (string, value) Hashtbl.t; (* live reference to kernel env *)\n}\n\n(** Forward reference for JIT compilation — set after definition. *)\nlet jit_compile_ref : (lambda -> (string, value) Hashtbl.t -> vm_closure option) ref =\n ref (fun _ _ -> None)\n\n(** Sentinel closure indicating JIT compilation was attempted and failed.\n Prevents retrying compilation on every call. *)\nlet jit_failed_sentinel = {\n vm_code = { vc_arity = -1; vc_locals = 0; vc_bytecode = [||]; vc_constants = [||] };\n vm_upvalues = [||]; vm_name = Some \"__jit_failed__\"; vm_env_ref = Hashtbl.create 0; vm_closure_env = None\n}\n\nlet is_jit_failed cl = cl.vm_code.vc_arity = -1\n\n(** Current active VM — allows HO primitives (map, filter, for-each, some)\n to call VmClosure callbacks on the same VM instead of creating a new one.\n This is critical: creating a new VM per callback loses the calling VM's\n stack/frame context, causing upvalue-captured host objects to become\n inaccessible. *)\nlet _active_vm : vm option ref = ref None\n\nlet create globals =\n { stack = Array.make 4096 Nil; sp = 0; frames = []; globals }\n\n(** Stack ops — inlined for speed. *)\nlet push vm v =\n if vm.sp >= Array.length vm.stack then begin\n let ns = Array.make (vm.sp * 2) Nil in\n Array.blit vm.stack 0 ns 0 vm.sp;\n vm.stack <- ns\n end;\n vm.stack.(vm.sp) <- v;\n vm.sp <- vm.sp + 1\n\nlet[@inline] pop vm =\n vm.sp <- vm.sp - 1;\n vm.stack.(vm.sp)\n\nlet[@inline] peek vm = vm.stack.(vm.sp - 1)\n\n(** Read operands. *)\nlet[@inline] read_u8 f =\n let v = f.closure.vm_code.vc_bytecode.(f.ip) in\n f.ip <- f.ip + 1; v\n\nlet[@inline] read_u16 f =\n let lo = f.closure.vm_code.vc_bytecode.(f.ip) in\n let hi = f.closure.vm_code.vc_bytecode.(f.ip + 1) in\n f.ip <- f.ip + 2;\n lo lor (hi lsl 8)\n\nlet[@inline] read_i16 f =\n let v = read_u16 f in\n if v >= 32768 then v - 65536 else v\n\n(** Wrap a VM closure as an SX value (NativeFn). *)\nlet closure_to_value cl =\n NativeFn (\"vm:\" ^ (match cl.vm_name with Some n -> n | None -> \"anon\"),\n fun args -> raise (Eval_error (\"VM_CLOSURE_CALL:\" ^ String.concat \",\" (List.map Sx_runtime.value_to_str args))))\n (* Placeholder — actual calls go through vm_call below *)\n\nlet _vm_insn_count = ref 0\nlet _vm_call_count = ref 0\nlet _vm_cek_count = ref 0\nlet vm_reset_counters () = _vm_insn_count := 0; _vm_call_count := 0; _vm_cek_count := 0\nlet vm_report_counters () =\n Printf.eprintf \"[vm-perf] insns=%d calls=%d cek_fallbacks=%d\\n%!\"\n !_vm_insn_count !_vm_call_count !_vm_cek_count\n\n(** Push a VM closure frame onto the current VM — no new VM allocation.\n This is the fast path for intra-VM closure calls. *)\nlet push_closure_frame vm cl args =\n let frame = { closure = cl; ip = 0; base = vm.sp; local_cells = Hashtbl.create 4 } in\n List.iter (fun a -> push vm a) args;\n for _ = List.length args to cl.vm_code.vc_locals - 1 do push vm Nil done;\n vm.frames <- frame :: vm.frames\n\n(** Convert compiler output (SX dict) to a vm_code object. *)\nlet code_from_value v =\n match v with\n | Dict d ->\n let bc_list = match Hashtbl.find_opt d \"bytecode\" with\n | Some (List l | ListRef { contents = l }) ->\n Array.of_list (List.map (fun x -> match x with Number n -> int_of_float n | _ -> 0) l)\n | _ -> [||]\n in\n let entries = match Hashtbl.find_opt d \"constants\" with\n | Some (List l | ListRef { contents = l }) -> Array.of_list l\n | _ -> [||]\n in\n let constants = Array.map (fun entry ->\n match entry with\n | Dict ed when Hashtbl.mem ed \"bytecode\" -> entry (* nested code — convert lazily *)\n | _ -> entry\n ) entries in\n let arity = match Hashtbl.find_opt d \"arity\" with\n | Some (Number n) -> int_of_float n | _ -> 0\n in\n { vc_arity = arity; vc_locals = arity + 16; vc_bytecode = bc_list; vc_constants = constants }\n | _ -> { vc_arity = 0; vc_locals = 16; vc_bytecode = [||]; vc_constants = [||] }\n\n(** Execute a closure with arguments — creates a fresh VM.\n Used for entry points: JIT Lambda calls, module execution, cross-boundary. *)\nlet rec call_closure cl args globals =\n incr _vm_call_count;\n let prev_vm = !_active_vm in\n let vm = create globals in\n _active_vm := Some vm;\n push_closure_frame vm cl args;\n (try run vm with e -> _active_vm := prev_vm; raise e);\n _active_vm := prev_vm;\n pop vm\n\n(** Call a VmClosure on the active VM if one exists, otherwise create a new one.\n This is the path used by HO primitives (map, filter, for-each, some) so\n callbacks can access upvalues that reference the calling VM's state. *)\nand call_closure_reuse cl args =\n call_closure cl args cl.vm_env_ref\n\n(** Call a value as a function — dispatch by type.\n VmClosure: pushes frame on current VM (fast intra-VM path).\n Lambda: tries JIT then falls back to CEK.\n NativeFn: calls directly. *)\nand vm_call vm f args =\n match f with\n | VmClosure cl ->\n (* Fast path: push frame on current VM — no allocation, enables TCO *)\n push_closure_frame vm cl args\n | NativeFn (_name, fn) ->\n let result = fn args in\n push vm result\n | Lambda l ->\n (match l.l_compiled with\n | Some cl when not (is_jit_failed cl) ->\n (* Cached bytecode — run on VM using the closure's captured env,\n not the caller's globals. Closure vars were merged at compile time. *)\n (try push vm (call_closure cl args cl.vm_env_ref)\n with _e ->\n (* Fallback to CEK — data-dependent error, not a JIT bug.\n Dedup logging happens in register_jit_hook. *)\n push vm (Sx_ref.cek_call f (List args)))\n | Some _ ->\n (* Compile failed — CEK *)\n push vm (Sx_ref.cek_call f (List args))\n | None ->\n if l.l_name <> None\n then begin\n (* Pre-mark before compile attempt to prevent re-entrancy *)\n l.l_compiled <- Some jit_failed_sentinel;\n match !jit_compile_ref l vm.globals with\n | Some cl ->\n l.l_compiled <- Some cl;\n (try push vm (call_closure cl args cl.vm_env_ref)\n with _e -> push vm (Sx_ref.cek_call f (List args)))\n | None ->\n push vm (Sx_ref.cek_call f (List args))\n end\n else\n push vm (Sx_ref.cek_call f (List args)))\n | Component _ | Island _ ->\n (* Components use keyword-arg parsing — CEK handles this *)\n incr _vm_cek_count;\n let result = Sx_ref.cek_call f (List args) in\n push vm result\n | _ ->\n raise (Eval_error (\"VM: not callable: \" ^ Sx_runtime.value_to_str f))\n\n(** Main execution loop — iterative (no OCaml stack growth).\n VmClosure calls push frames; the loop picks them up.\n OP_TAIL_CALL + VmClosure = true TCO: drop frame, push new, loop. *)\nand run vm =\n while vm.frames <> [] do\n match vm.frames with\n | [] -> () (* guard handled by while condition *)\n | frame :: rest_frames ->\n let bc = frame.closure.vm_code.vc_bytecode in\n let consts = frame.closure.vm_code.vc_constants in\n if frame.ip >= Array.length bc then begin\n (* Bytecode exhausted without explicit RETURN — pop frame like RETURN *)\n let fn_name = match frame.closure.vm_name with Some n -> n | None -> \"?\" in\n Printf.eprintf \"[vm] WARN: bytecode exhausted without RETURN in %s (base=%d sp=%d frames=%d)\\n%!\"\n fn_name frame.base vm.sp (List.length rest_frames);\n let result = if vm.sp > frame.base then pop vm else Nil in\n vm.frames <- rest_frames;\n vm.sp <- frame.base;\n if rest_frames <> [] then push vm result\n (* If no more frames, result stays on stack for call_closure to pop *)\n end\n else begin\n let saved_ip = frame.ip in\n let op = bc.(frame.ip) in\n frame.ip <- frame.ip + 1;\n (try match op with\n (* ---- Constants ---- *)\n | 1 (* OP_CONST *) ->\n let idx = read_u16 frame in\n if idx >= Array.length consts then\n raise (Eval_error (Printf.sprintf \"VM: CONST index %d out of bounds (pool size %d)\"\n idx (Array.length consts)));\n push vm consts.(idx)\n | 2 (* OP_NIL *) -> push vm Nil\n | 3 (* OP_TRUE *) -> push vm (Bool true)\n | 4 (* OP_FALSE *) -> push vm (Bool false)\n | 5 (* OP_POP *) -> ignore (pop vm)\n | 6 (* OP_DUP *) -> push vm (peek vm)\n\n (* ---- Variable access ---- *)\n | 16 (* OP_LOCAL_GET *) ->\n let slot = read_u8 frame in\n let v = match Hashtbl.find_opt frame.local_cells slot with\n | Some cell -> cell.uv_value\n | None ->\n let idx = frame.base + slot in\n if idx >= vm.sp then\n raise (Eval_error (Printf.sprintf\n \"VM: LOCAL_GET slot=%d base=%d sp=%d out of bounds\" slot frame.base vm.sp));\n vm.stack.(idx)\n in\n push vm v\n | 17 (* OP_LOCAL_SET *) ->\n let slot = read_u8 frame in\n let v = peek vm in\n (* Write to shared cell if captured, else to stack *)\n (match Hashtbl.find_opt frame.local_cells slot with\n | Some cell -> cell.uv_value <- v\n | None -> vm.stack.(frame.base + slot) <- v)\n | 18 (* OP_UPVALUE_GET *) ->\n let idx = read_u8 frame in\n if idx >= Array.length frame.closure.vm_upvalues then\n raise (Eval_error (Printf.sprintf\n \"VM: UPVALUE_GET idx=%d out of bounds (have %d)\" idx\n (Array.length frame.closure.vm_upvalues)));\n push vm frame.closure.vm_upvalues.(idx).uv_value\n | 19 (* OP_UPVALUE_SET *) ->\n let idx = read_u8 frame in\n frame.closure.vm_upvalues.(idx).uv_value <- peek vm\n | 20 (* OP_GLOBAL_GET *) ->\n let idx = read_u16 frame in\n let name = match consts.(idx) with String s -> s | _ -> \"\" in\n let v = try Hashtbl.find vm.globals name with Not_found ->\n (* Walk the closure env chain for inner functions *)\n let id = Sx_types.intern name in\n let rec env_lookup e =\n try Hashtbl.find e.bindings id\n with Not_found ->\n match e.parent with Some p -> env_lookup p | None ->\n try Sx_primitives.get_primitive name\n with _ -> raise (Eval_error (\"VM undefined: \" ^ name))\n in\n match frame.closure.vm_closure_env with\n | Some env -> env_lookup env\n | None ->\n try Sx_primitives.get_primitive name\n with _ -> raise (Eval_error (\"VM undefined: \" ^ name))\n in\n push vm v\n | 21 (* OP_GLOBAL_SET *) ->\n let idx = read_u16 frame in\n let name = match consts.(idx) with String s -> s | _ -> \"\" in\n (* Write to closure env if the name exists there (mutable closure vars) *)\n let written = match frame.closure.vm_closure_env with\n | Some env ->\n let id = Sx_types.intern name in\n let rec find_env e =\n if Hashtbl.mem e.bindings id then\n (Hashtbl.replace e.bindings id (peek vm); true)\n else match e.parent with Some p -> find_env p | None -> false\n in find_env env\n | None -> false\n in\n if not written then begin\n let v = peek vm in\n Hashtbl.replace vm.globals name v;\n (match !Sx_types._vm_global_set_hook with Some f -> f name v | None -> ())\n end\n\n (* ---- Control flow ---- *)\n | 32 (* OP_JUMP *) ->\n let offset = read_i16 frame in\n frame.ip <- frame.ip + offset\n | 33 (* OP_JUMP_IF_FALSE *) ->\n let offset = read_i16 frame in\n let v = pop vm in\n if not (sx_truthy v) then frame.ip <- frame.ip + offset\n | 34 (* OP_JUMP_IF_TRUE *) ->\n let offset = read_i16 frame in\n let v = pop vm in\n if sx_truthy v then frame.ip <- frame.ip + offset\n\n (* ---- Function calls ---- *)\n | 48 (* OP_CALL *) ->\n let argc = read_u8 frame in\n let args = Array.init argc (fun _ -> pop vm) in\n let f = pop vm in\n let args_list = List.rev (Array.to_list args) in\n vm_call vm f args_list\n (* Loop continues — if VmClosure, new frame runs next iteration *)\n | 49 (* OP_TAIL_CALL *) ->\n let argc = read_u8 frame in\n let args = Array.init argc (fun _ -> pop vm) in\n let f = pop vm in\n let args_list = List.rev (Array.to_list args) in\n (* Drop current frame, reuse stack space — true TCO for VmClosure *)\n vm.frames <- rest_frames;\n vm.sp <- frame.base;\n vm_call vm f args_list\n | 50 (* OP_RETURN *) ->\n let result = pop vm in\n vm.frames <- rest_frames;\n vm.sp <- frame.base;\n push vm result\n (* Loop continues with caller frame *)\n | 51 (* OP_CLOSURE *) ->\n let idx = read_u16 frame in\n if idx >= Array.length consts then\n raise (Eval_error (Printf.sprintf \"VM: CLOSURE idx %d >= consts %d\" idx (Array.length consts)));\n let code_val = consts.(idx) in\n let code = code_from_value code_val in\n (* Read upvalue descriptors from bytecode *)\n let uv_count = match code_val with\n | Dict d -> (match Hashtbl.find_opt d \"upvalue-count\" with\n | Some (Number n) -> int_of_float n | _ -> 0)\n | _ -> 0\n in\n let upvalues = Array.init uv_count (fun _ ->\n let is_local = read_u8 frame in\n let index = read_u8 frame in\n if is_local = 1 then begin\n (* Capture from enclosing frame's local slot.\n Create a shared cell — both parent and closure\n read/write through this cell. *)\n let cell = match Hashtbl.find_opt frame.local_cells index with\n | Some existing -> existing (* reuse existing cell *)\n | None ->\n let c = { uv_value = vm.stack.(frame.base + index) } in\n Hashtbl.replace frame.local_cells index c;\n c\n in\n cell\n end else\n (* Capture from enclosing frame's upvalue — already a shared cell *)\n frame.closure.vm_upvalues.(index)\n ) in\n let cl = { vm_code = code; vm_upvalues = upvalues; vm_name = None;\n vm_env_ref = vm.globals; vm_closure_env = frame.closure.vm_closure_env } in\n push vm (VmClosure cl)\n | 52 (* OP_CALL_PRIM *) ->\n let idx = read_u16 frame in\n let argc = read_u8 frame in\n let name = match consts.(idx) with String s -> s | _ -> \"\" in\n let args = List.init argc (fun _ -> pop vm) |> List.rev in\n (* Resolve thunks — the CEK evaluator does this automatically\n via trampoline, but the VM must do it explicitly before\n passing args to primitives. *)\n let args = List.map (fun v ->\n match v with\n | Thunk _ -> !Sx_primitives._sx_trampoline_fn v\n | _ -> v) args in\n let result =\n try\n (* Single lookup: vm.globals is the sole source of truth.\n Primitives are seeded into vm.globals at init as NativeFn values.\n OP_DEFINE and registerNative naturally override them. *)\n let fn_val = try Hashtbl.find vm.globals name with Not_found ->\n raise (Eval_error (\"VM: unknown primitive \" ^ name))\n in\n (match fn_val with\n | NativeFn (_, fn) -> fn args\n | VmClosure _ | Lambda _ | Component _ | Island _ ->\n Sx_ref.cek_call fn_val (List args)\n | _ -> Nil)\n with Eval_error msg ->\n raise (Eval_error (Printf.sprintf \"%s (in CALL_PRIM \\\"%s\\\" with %d args)\"\n msg name argc))\n in\n push vm result\n\n (* ---- Collections ---- *)\n | 64 (* OP_LIST *) ->\n let count = read_u16 frame in\n let items = List.init count (fun _ -> pop vm) |> List.rev in\n push vm (List items)\n | 65 (* OP_DICT *) ->\n let count = read_u16 frame in\n let d = Hashtbl.create count in\n for _ = 1 to count do\n let v = pop vm in\n let k = pop vm in\n let key = match k with String s -> s | Keyword s -> s | _ -> Sx_runtime.value_to_str k in\n Hashtbl.replace d key v\n done;\n push vm (Dict d)\n\n (* ---- String ops ---- *)\n | 144 (* OP_STR_CONCAT *) ->\n let count = read_u8 frame in\n let parts = List.init count (fun _ -> pop vm) |> List.rev in\n let s = String.concat \"\" (List.map Sx_runtime.value_to_str parts) in\n push vm (String s)\n\n (* ---- Define ---- *)\n | 128 (* OP_DEFINE *) ->\n let idx = read_u16 frame in\n let name = match consts.(idx) with String s -> s | _ -> \"\" in\n let v = peek vm in\n Hashtbl.replace vm.globals name v;\n (match !Sx_types._vm_global_set_hook with\n | Some f -> f name v | None -> ())\n\n (* ---- Inline primitives ----\n Fast path for common types; fallback to actual primitive\n for edge cases (type coercion, thunks, RawHTML, etc.)\n to guarantee behavioral parity with CALL_PRIM. *)\n | 160 (* OP_ADD *) ->\n let b = pop vm and a = pop vm in\n push vm (match a, b with\n | Number x, Number y -> Number (x +. y)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"+\") [a; b])\n | 161 (* OP_SUB *) ->\n let b = pop vm and a = pop vm in\n push vm (match a, b with\n | Number x, Number y -> Number (x -. y)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"-\") [a; b])\n | 162 (* OP_MUL *) ->\n let b = pop vm and a = pop vm in\n push vm (match a, b with\n | Number x, Number y -> Number (x *. y)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"*\") [a; b])\n | 163 (* OP_DIV *) ->\n let b = pop vm and a = pop vm in\n push vm (match a, b with\n | Number x, Number y -> Number (x /. y)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"/\") [a; b])\n | 164 (* OP_EQ *) ->\n let b = pop vm and a = pop vm in\n let rec norm = function\n | ListRef { contents = l } -> List (List.map norm l)\n | List l -> List (List.map norm l) | v -> v in\n push vm (Bool (norm a = norm b))\n | 165 (* OP_LT *) ->\n let b = pop vm and a = pop vm in\n push vm (match a, b with\n | Number x, Number y -> Bool (x < y)\n | String x, String y -> Bool (x < y)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"<\") [a; b])\n | 166 (* OP_GT *) ->\n let b = pop vm and a = pop vm in\n push vm (match a, b with\n | Number x, Number y -> Bool (x > y)\n | String x, String y -> Bool (x > y)\n | _ -> (Hashtbl.find Sx_primitives.primitives \">\") [a; b])\n | 167 (* OP_NOT *) ->\n let v = pop vm in\n push vm (Bool (not (sx_truthy v)))\n | 168 (* OP_LEN *) ->\n let v = pop vm in\n push vm (match v with\n | List l | ListRef { contents = l } -> Number (float_of_int (List.length l))\n | String s -> Number (float_of_int (String.length s))\n | Dict d -> Number (float_of_int (Hashtbl.length d))\n | Nil -> Number 0.0\n | _ -> (Hashtbl.find Sx_primitives.primitives \"len\") [v])\n | 169 (* OP_FIRST *) ->\n let v = pop vm in\n push vm (match v with\n | List (x :: _) | ListRef { contents = x :: _ } -> x\n | List [] | ListRef { contents = [] } | Nil -> Nil\n | _ -> (Hashtbl.find Sx_primitives.primitives \"first\") [v])\n | 170 (* OP_REST *) ->\n let v = pop vm in\n push vm (match v with\n | List (_ :: xs) | ListRef { contents = _ :: xs } -> List xs\n | List [] | ListRef { contents = [] } | Nil -> List []\n | _ -> (Hashtbl.find Sx_primitives.primitives \"rest\") [v])\n | 171 (* OP_NTH *) ->\n let n = pop vm and coll = pop vm in\n push vm (match coll, n with\n | (List l | ListRef { contents = l }), Number f ->\n (try List.nth l (int_of_float f) with _ -> Nil)\n | String s, Number f ->\n let i = int_of_float f in\n if i >= 0 && i < String.length s then String (String.make 1 s.[i])\n else Nil\n | _ -> (Hashtbl.find Sx_primitives.primitives \"nth\") [coll; n])\n | 172 (* OP_CONS *) ->\n let coll = pop vm and x = pop vm in\n push vm (match coll with\n | List l -> List (x :: l)\n | ListRef { contents = l } -> List (x :: l)\n | Nil -> List [x]\n | _ -> (Hashtbl.find Sx_primitives.primitives \"cons\") [x; coll])\n | 173 (* OP_NEG *) ->\n let v = pop vm in\n push vm (match v with\n | Number x -> Number (-.x)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"-\") [v])\n | 174 (* OP_INC *) ->\n let v = pop vm in\n push vm (match v with\n | Number x -> Number (x +. 1.0)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"inc\") [v])\n | 175 (* OP_DEC *) ->\n let v = pop vm in\n push vm (match v with\n | Number x -> Number (x -. 1.0)\n | _ -> (Hashtbl.find Sx_primitives.primitives \"dec\") [v])\n\n | opcode ->\n raise (Eval_error (Printf.sprintf \"VM: unknown opcode %d at ip=%d\"\n opcode (frame.ip - 1)))\n with Invalid_argument msg ->\n let fn_name = match frame.closure.vm_name with Some n -> n | None -> \"?\" in\n raise (Eval_error (Printf.sprintf\n \"VM: %s at ip=%d op=%d in %s (base=%d sp=%d bc_len=%d consts=%d)\"\n msg saved_ip op fn_name frame.base vm.sp\n (Array.length bc) (Array.length consts))))\n end\n done\n\n(** Execute a compiled module (top-level bytecode). *)\nlet execute_module code globals =\n let cl = { vm_code = code; vm_upvalues = [||]; vm_name = Some \"module\"; vm_env_ref = globals; vm_closure_env = None } in\n let vm = create globals in\n let frame = { closure = cl; ip = 0; base = 0; local_cells = Hashtbl.create 4 } in\n for _ = 0 to code.vc_locals - 1 do push vm Nil done;\n vm.frames <- [frame];\n run vm;\n pop vm\n\n\n(** {1 Lazy JIT compilation} *)\n\n(** Compile a lambda or component body to bytecode using the SX compiler.\n Invokes [compile] from spec/compiler.sx via the CEK machine.\n Returns a [vm_closure] ready for execution, or [None] on failure\n (safe fallback to CEK interpretation).\n\n The compilation cost is a single CEK evaluation of the compiler —\n microseconds per function. The result is cached in the lambda/component\n record so subsequent calls go straight to the VM. *)\nlet jit_compile_lambda (l : lambda) globals =\n let fn_name = match l.l_name with Some n -> n | None -> \"<anon>\" in\n try\n let compile_fn = try Hashtbl.find globals \"compile\"\n with Not_found -> raise (Eval_error \"JIT: compiler not loaded\") in\n (* Reconstruct the (fn (params) body) form so the compiler produces\n a proper closure. l.l_body is the inner body; we need the full\n function form with params so the compiled code binds them. *)\n let param_syms = List (List.map (fun s -> Symbol s) l.l_params) in\n let fn_expr = List [Symbol \"fn\"; param_syms; l.l_body] in\n let quoted = List [Symbol \"quote\"; fn_expr] in\n (* Use Symbol \"compile\" so the CEK resolves it from the env, not\n an embedded VmClosure value — the CEK dispatches VmClosure calls\n differently when the value is resolved from env vs embedded in AST. *)\n ignore compile_fn;\n let compile_env = Sx_types.env_extend (Sx_types.make_env ()) in\n Hashtbl.iter (fun k v -> Hashtbl.replace compile_env.bindings (Sx_types.intern k) v) globals;\n let result = Sx_ref.eval_expr (List [Symbol \"compile\"; quoted]) (Env compile_env) in\n (* Closure vars are accessible via vm_closure_env (set on the VmClosure\n at line ~617). OP_GLOBAL_GET falls back to vm_closure_env when vars\n aren't in globals. No injection into the shared globals table —\n that would break closure isolation for factory functions like\n make-page-fn where multiple closures capture different values\n for the same variable names. *)\n let effective_globals = globals in\n (match result with\n | Dict d when Hashtbl.mem d \"bytecode\" ->\n let outer_code = code_from_value result in\n let bc = outer_code.vc_bytecode in\n if Array.length bc >= 4 && bc.(0) = 51 (* OP_CLOSURE *) then begin\n let idx = bc.(1) lor (bc.(2) lsl 8) in\n if idx < Array.length outer_code.vc_constants then\n let inner_val = outer_code.vc_constants.(idx) in\n let code = code_from_value inner_val in\n Some { vm_code = code; vm_upvalues = [||];\n vm_name = l.l_name; vm_env_ref = effective_globals; vm_closure_env = Some l.l_closure }\n else begin\n Printf.eprintf \"[jit] FAIL %s: closure index %d out of bounds (pool=%d)\\n%!\"\n fn_name idx (Array.length outer_code.vc_constants);\n\n None\n end\n end else begin\n (* Not a closure — constant expression, alias, or simple computation.\n Execute the bytecode as a module to get the value, then wrap\n as a NativeFn if it's callable (so the CEK can dispatch to it). *)\n (try\n let value = execute_module outer_code globals in\n Printf.eprintf \"[jit] RESOLVED %s: %s (bc[0]=%d)\\n%!\"\n fn_name (type_of value) (if Array.length bc > 0 then bc.(0) else -1);\n (* If the resolved value is a NativeFn, we can't wrap it as a\n vm_closure — just let the CEK handle it directly. Return None\n so the lambda falls through to CEK, which will find the\n resolved value in the env on next lookup. *)\n None\n with _ ->\n Printf.eprintf \"[jit] SKIP %s: non-closure execution failed (bc[0]=%d, len=%d)\\n%!\"\n fn_name (if Array.length bc > 0 then bc.(0) else -1) (Array.length bc);\n None)\n end\n | _ ->\n Printf.eprintf \"[jit] FAIL %s: compiler returned %s\\n%!\" fn_name (type_of result);\n None)\n with e ->\n Printf.eprintf \"[jit] FAIL %s: %s\\n%!\" fn_name (Printexc.to_string e);\n None\n\n(* Wire up forward references *)\nlet () = jit_compile_ref := jit_compile_lambda\nlet () = _vm_call_closure_ref := (fun cl args -> call_closure cl args cl.vm_env_ref)\n\n\n(** {1 Debugging / introspection} *)\n\n(** Map opcode integer to human-readable name. *)\nlet opcode_name = function\n | 1 -> \"CONST\" | 2 -> \"NIL\" | 3 -> \"TRUE\" | 4 -> \"FALSE\"\n | 5 -> \"POP\" | 6 -> \"DUP\"\n | 16 -> \"LOCAL_GET\" | 17 -> \"LOCAL_SET\"\n | 18 -> \"UPVALUE_GET\" | 19 -> \"UPVALUE_SET\"\n | 20 -> \"GLOBAL_GET\" | 21 -> \"GLOBAL_SET\"\n | 32 -> \"JUMP\" | 33 -> \"JUMP_IF_FALSE\" | 34 -> \"JUMP_IF_TRUE\"\n | 48 -> \"CALL\" | 49 -> \"TAIL_CALL\" | 50 -> \"RETURN\"\n | 51 -> \"CLOSURE\" | 52 -> \"CALL_PRIM\"\n | 64 -> \"LIST\" | 65 -> \"DICT\"\n | 128 -> \"DEFINE\"\n | 144 -> \"STR_CONCAT\"\n | 160 -> \"ADD\" | 161 -> \"SUB\" | 162 -> \"MUL\" | 163 -> \"DIV\"\n | 164 -> \"EQ\" | 165 -> \"LT\" | 166 -> \"GT\" | 167 -> \"NOT\"\n | 168 -> \"LEN\" | 169 -> \"FIRST\" | 170 -> \"REST\" | 171 -> \"NTH\"\n | 172 -> \"CONS\" | 173 -> \"NEG\" | 174 -> \"INC\" | 175 -> \"DEC\"\n | n -> Printf.sprintf \"UNKNOWN_%d\" n\n\n(** Number of extra operand bytes consumed by each opcode.\n Returns (format, total_bytes) where format describes the operand types. *)\nlet opcode_operand_size = function\n | 1 (* CONST *) | 20 (* GLOBAL_GET *) | 21 (* GLOBAL_SET *)\n | 64 (* LIST *) | 65 (* DICT *) | 128 (* DEFINE *) -> 2 (* u16 *)\n | 16 (* LOCAL_GET *) | 17 (* LOCAL_SET *)\n | 18 (* UPVALUE_GET *) | 19 (* UPVALUE_SET *)\n | 48 (* CALL *) | 49 (* TAIL_CALL *)\n | 144 (* STR_CONCAT *) -> 1 (* u8 *)\n | 32 (* JUMP *) | 33 (* JUMP_IF_FALSE *) | 34 (* JUMP_IF_TRUE *) -> 2 (* i16 *)\n | 51 (* CLOSURE *) -> 2 (* u16 for constant index; upvalue descriptors follow dynamically *)\n | 52 (* CALL_PRIM *) -> 3 (* u16 + u8 *)\n | _ -> 0 (* no operand *)\n\n(** Trace a single execution — compile + run, collecting trace entries.\n Each entry is a dict with :opcode, :stack, :depth. *)\nlet trace_run src globals =\n (* Compile *)\n let compile_fn = try Hashtbl.find globals \"compile\"\n with Not_found -> raise (Eval_error \"trace: compiler not loaded\") in\n let exprs = Sx_parser.parse_all src in\n let expr = match exprs with [e] -> e | _ -> List (Symbol \"do\" :: exprs) in\n let quoted = List [Symbol \"quote\"; expr] in\n let code_val = Sx_ref.eval_expr (List [compile_fn; quoted]) (Env (make_env ())) in\n let code = code_from_value code_val in\n let cl = { vm_code = code; vm_upvalues = [||]; vm_name = Some \"trace\";\n vm_env_ref = globals; vm_closure_env = None } in\n let vm = create globals in\n let frame0 = { closure = cl; ip = 0; base = 0; local_cells = Hashtbl.create 4 } in\n for _ = 0 to code.vc_locals - 1 do push vm Nil done;\n vm.frames <- [frame0];\n (* Run with tracing *)\n let trace = ref [] in\n let max_steps = 10000 in\n let steps = ref 0 in\n (try\n while vm.frames <> [] && !steps < max_steps do\n match vm.frames with\n | [] -> ()\n | frame :: _ ->\n let bc = frame.closure.vm_code.vc_bytecode in\n if frame.ip >= Array.length bc then\n vm.frames <- []\n else begin\n let op = bc.(frame.ip) in\n (* Snapshot stack top 5 *)\n let stack_snap = List.init (min 5 vm.sp) (fun i ->\n let v = vm.stack.(vm.sp - 1 - i) in\n String (Sx_types.inspect v)) in\n let entry = Hashtbl.create 4 in\n Hashtbl.replace entry \"opcode\" (String (opcode_name op));\n Hashtbl.replace entry \"stack\" (List stack_snap);\n Hashtbl.replace entry \"depth\" (Number (float_of_int (List.length vm.frames)));\n trace := Dict entry :: !trace;\n incr steps;\n (* Execute one step — use the main run loop for 1 step.\n We do this by saving the state and running the original dispatch. *)\n let saved_ip = frame.ip in\n frame.ip <- frame.ip + 1;\n let rest_frames = List.tl vm.frames in\n (try match op with\n | 1 -> let idx = read_u16 frame in push vm frame.closure.vm_code.vc_constants.(idx)\n | 2 -> push vm Nil\n | 3 -> push vm (Bool true)\n | 4 -> push vm (Bool false)\n | 5 -> ignore (pop vm)\n | 6 -> push vm (peek vm)\n | 16 -> let slot = read_u8 frame in\n let v = match Hashtbl.find_opt frame.local_cells slot with\n | Some cell -> cell.uv_value\n | None -> vm.stack.(frame.base + slot) in\n push vm v\n | 17 -> let slot = read_u8 frame in let v = peek vm in\n (match Hashtbl.find_opt frame.local_cells slot with\n | Some cell -> cell.uv_value <- v\n | None -> vm.stack.(frame.base + slot) <- v)\n | 18 -> let idx = read_u8 frame in\n push vm frame.closure.vm_upvalues.(idx).uv_value\n | 19 -> let idx = read_u8 frame in\n frame.closure.vm_upvalues.(idx).uv_value <- peek vm\n | 20 -> let idx = read_u16 frame in\n let name = match frame.closure.vm_code.vc_constants.(idx) with String s -> s | _ -> \"\" in\n let v = try Hashtbl.find vm.globals name with Not_found ->\n try Sx_primitives.get_primitive name with _ ->\n raise (Eval_error (\"VM undefined: \" ^ name)) in\n push vm v\n | 21 -> let idx = read_u16 frame in\n let name = match frame.closure.vm_code.vc_constants.(idx) with String s -> s | _ -> \"\" in\n Hashtbl.replace vm.globals name (peek vm)\n | 32 -> let offset = read_i16 frame in frame.ip <- frame.ip + offset\n | 33 -> let offset = read_i16 frame in let v = pop vm in\n if not (sx_truthy v) then frame.ip <- frame.ip + offset\n | 34 -> let offset = read_i16 frame in let v = pop vm in\n if sx_truthy v then frame.ip <- frame.ip + offset\n | 48 -> let argc = read_u8 frame in\n let args = Array.init argc (fun _ -> pop vm) in\n let f = pop vm in\n vm_call vm f (List.rev (Array.to_list args))\n | 49 -> let argc = read_u8 frame in\n let args = Array.init argc (fun _ -> pop vm) in\n let f = pop vm in\n vm.frames <- rest_frames; vm.sp <- frame.base;\n vm_call vm f (List.rev (Array.to_list args))\n | 50 -> let result = pop vm in\n vm.frames <- rest_frames; vm.sp <- frame.base; push vm result\n | 51 -> (* CLOSURE — skip for trace, just advance past upvalue descriptors *)\n let idx = read_u16 frame in\n let code_val2 = frame.closure.vm_code.vc_constants.(idx) in\n let uv_count = match code_val2 with\n | Dict d -> (match Hashtbl.find_opt d \"upvalue-count\" with\n | Some (Number n) -> int_of_float n | _ -> 0)\n | _ -> 0 in\n let upvalues = Array.init uv_count (fun _ ->\n let is_local = read_u8 frame in\n let index = read_u8 frame in\n if is_local = 1 then begin\n let cell = match Hashtbl.find_opt frame.local_cells index with\n | Some existing -> existing\n | None ->\n let c = { uv_value = vm.stack.(frame.base + index) } in\n Hashtbl.replace frame.local_cells index c; c in\n cell\n end else frame.closure.vm_upvalues.(index)\n ) in\n let inner_code = code_from_value code_val2 in\n let c = { vm_code = inner_code; vm_upvalues = upvalues; vm_name = None;\n vm_env_ref = vm.globals; vm_closure_env = frame.closure.vm_closure_env } in\n push vm (VmClosure c)\n | 52 -> let idx = read_u16 frame in let argc = read_u8 frame in\n let name = match frame.closure.vm_code.vc_constants.(idx) with String s -> s | _ -> \"\" in\n let args = List.init argc (fun _ -> pop vm) |> List.rev in\n let fn_val = try Sx_primitives.get_primitive name with _ ->\n try Hashtbl.find vm.globals name with Not_found ->\n raise (Eval_error (\"VM: unknown primitive \" ^ name)) in\n (match fn_val with NativeFn (_, fn) -> push vm (fn args) | _ -> push vm Nil)\n | 64 -> let count = read_u16 frame in\n let items = List.init count (fun _ -> pop vm) |> List.rev in\n push vm (List items)\n | 65 -> let count = read_u16 frame in\n let d = Hashtbl.create count in\n for _ = 1 to count do let v = pop vm in let k = pop vm in\n let key = match k with String s -> s | Keyword s -> s | _ -> Sx_runtime.value_to_str k in\n Hashtbl.replace d key v done;\n push vm (Dict d)\n | 128 -> let idx = read_u16 frame in\n let name = match frame.closure.vm_code.vc_constants.(idx) with String s -> s | _ -> \"\" in\n Hashtbl.replace vm.globals name (peek vm)\n | 144 -> let count = read_u8 frame in\n let parts = List.init count (fun _ -> pop vm) |> List.rev in\n push vm (String (String.concat \"\" (List.map Sx_runtime.value_to_str parts)))\n | 160 -> let b = pop vm and a = pop vm in\n push vm (match a, b with Number x, Number y -> Number (x +. y) | _ -> Nil)\n | 161 -> let b = pop vm and a = pop vm in\n push vm (match a, b with Number x, Number y -> Number (x -. y) | _ -> Nil)\n | 162 -> let b = pop vm and a = pop vm in\n push vm (match a, b with Number x, Number y -> Number (x *. y) | _ -> Nil)\n | 163 -> let b = pop vm and a = pop vm in\n push vm (match a, b with Number x, Number y -> Number (x /. y) | _ -> Nil)\n | 164 -> let b = pop vm and a = pop vm in push vm (Bool (a = b))\n | 165 -> let b = pop vm and a = pop vm in\n push vm (match a, b with Number x, Number y -> Bool (x < y) | _ -> Bool false)\n | 166 -> let b = pop vm and a = pop vm in\n push vm (match a, b with Number x, Number y -> Bool (x > y) | _ -> Bool false)\n | 167 -> let v = pop vm in push vm (Bool (not (sx_truthy v)))\n | 168 -> let v = pop vm in\n push vm (match v with\n | List l | ListRef { contents = l } -> Number (float_of_int (List.length l))\n | String s -> Number (float_of_int (String.length s))\n | _ -> Number 0.0)\n | 169 -> let v = pop vm in\n push vm (match v with List (x :: _) | ListRef { contents = x :: _ } -> x | _ -> Nil)\n | 170 -> let v = pop vm in\n push vm (match v with\n | List (_ :: xs) | ListRef { contents = _ :: xs } -> List xs | _ -> List [])\n | 171 -> let n = pop vm and coll = pop vm in\n push vm (match coll, n with\n | (List l | ListRef { contents = l }), Number f ->\n (try List.nth l (int_of_float f) with _ -> Nil) | _ -> Nil)\n | 172 -> let coll = pop vm and x = pop vm in\n push vm (match coll with List l -> List (x :: l) | _ -> List [x])\n | 173 -> let v = pop vm in\n push vm (match v with Number x -> Number (-.x) | _ -> Nil)\n | 174 -> let v = pop vm in\n push vm (match v with Number x -> Number (x +. 1.0) | _ -> Nil)\n | 175 -> let v = pop vm in\n push vm (match v with Number x -> Number (x -. 1.0) | _ -> Nil)\n | _ -> ()\n with e ->\n let _ = e in\n ignore saved_ip;\n (* On error during trace, just stop *)\n vm.frames <- [])\n end\n done\n with _ -> ());\n List (List.rev !trace)\n\n(** Disassemble a vm_code into a list of instruction dicts. *)\nlet disassemble (code : vm_code) =\n let bc = code.vc_bytecode in\n let len = Array.length bc in\n let consts = code.vc_constants in\n let instrs = ref [] in\n let ip = ref 0 in\n while !ip < len do\n let offset = !ip in\n let op = bc.(!ip) in\n ip := !ip + 1;\n let name = opcode_name op in\n let operands = ref [] in\n (match op with\n | 1 (* CONST *) | 20 (* GLOBAL_GET *) | 21 (* GLOBAL_SET *)\n | 128 (* DEFINE *) ->\n if !ip + 1 < len then begin\n let lo = bc.(!ip) in let hi = bc.(!ip + 1) in\n let idx = lo lor (hi lsl 8) in\n ip := !ip + 2;\n let const_str = if idx < Array.length consts\n then Sx_types.inspect consts.(idx) else \"?\" in\n operands := [Number (float_of_int idx); String const_str]\n end\n | 64 (* LIST *) | 65 (* DICT *) | 51 (* CLOSURE *) ->\n if !ip + 1 < len then begin\n let lo = bc.(!ip) in let hi = bc.(!ip + 1) in\n let idx = lo lor (hi lsl 8) in\n ip := !ip + 2;\n operands := [Number (float_of_int idx)];\n (* For CLOSURE, skip upvalue descriptors *)\n if op = 51 && idx < Array.length consts then begin\n let uv_count = match consts.(idx) with\n | Dict d -> (match Hashtbl.find_opt d \"upvalue-count\" with\n | Some (Number n) -> int_of_float n | _ -> 0)\n | _ -> 0 in\n ip := !ip + uv_count * 2\n end\n end\n | 16 (* LOCAL_GET *) | 17 (* LOCAL_SET *)\n | 18 (* UPVALUE_GET *) | 19 (* UPVALUE_SET *)\n | 48 (* CALL *) | 49 (* TAIL_CALL *)\n | 144 (* STR_CONCAT *) ->\n if !ip < len then begin\n let v = bc.(!ip) in ip := !ip + 1;\n operands := [Number (float_of_int v)]\n end\n | 32 (* JUMP *) | 33 (* JUMP_IF_FALSE *) | 34 (* JUMP_IF_TRUE *) ->\n if !ip + 1 < len then begin\n let lo = bc.(!ip) in let hi = bc.(!ip + 1) in\n let raw = lo lor (hi lsl 8) in\n let signed = if raw >= 32768 then raw - 65536 else raw in\n ip := !ip + 2;\n operands := [Number (float_of_int signed)]\n end\n | 52 (* CALL_PRIM *) ->\n if !ip + 2 < len then begin\n let lo = bc.(!ip) in let hi = bc.(!ip + 1) in\n let idx = lo lor (hi lsl 8) in\n let argc = bc.(!ip + 2) in\n ip := !ip + 3;\n let prim_name = if idx < Array.length consts\n then (match consts.(idx) with String s -> s | _ -> \"?\") else \"?\" in\n operands := [Number (float_of_int idx); String prim_name; Number (float_of_int argc)]\n end\n | _ -> ());\n let entry = Hashtbl.create 4 in\n Hashtbl.replace entry \"offset\" (Number (float_of_int offset));\n Hashtbl.replace entry \"opcode\" (String name);\n Hashtbl.replace entry \"operands\" (List !operands);\n instrs := Dict entry :: !instrs\n done;\n let result = Hashtbl.create 4 in\n Hashtbl.replace result \"arity\" (Number (float_of_int code.vc_arity));\n Hashtbl.replace result \"num_locals\" (Number (float_of_int code.vc_locals));\n Hashtbl.replace result \"constants\" (List (Array.to_list (Array.map (fun v -> String (Sx_types.inspect v)) consts)));\n Hashtbl.replace result \"bytecode\" (List (List.rev !instrs));\n Dict result\n","(* generated code 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Scope stacks — dynamic scope for render-time effects.\n\n Provides scope-push!/pop!/peek, collect!/collected/clear-collected!,\n scope-emit!/emitted/scope-emitted, context, and cookie access.\n\n All functions are registered as primitives so both the CEK evaluator\n and the JIT VM can find them in the same place. *)\n\nopen Sx_types\n\n(** The shared scope stacks hashtable. Each key maps to a stack of values.\n Used by aser for spread/provide/emit patterns, CSSX collect/flush, etc. *)\nlet scope_stacks : (string, value list) Hashtbl.t = Hashtbl.create 8\n\n(** Debug trace for scope operations — enabled from JS *)\nlet _scope_trace = ref false\nlet _scope_log : string list ref = ref []\nlet scope_trace_enable () = _scope_trace := true; _scope_log := []\nlet scope_trace_disable () = _scope_trace := false\nlet scope_trace_drain () =\n let log = List.rev !_scope_log in\n _scope_log := [];\n log\n\n(** Request cookies — set by the Python bridge before each render.\n get-cookie reads from here; set-cookie is a no-op on the server. *)\nlet request_cookies : (string, string) Hashtbl.t = Hashtbl.create 8\n\n(** Clear all scope stacks. Called between requests if needed. *)\nlet clear_all () = Hashtbl.clear scope_stacks\n\nlet () =\n let register = Sx_primitives.register in\n\n (* --- Cookies --- *)\n\n register \"get-cookie\" (fun args ->\n match args with\n | [String name] ->\n (match Hashtbl.find_opt request_cookies name with\n | Some v -> String v\n | None -> Nil)\n | _ -> Nil);\n\n register \"set-cookie\" (fun _args -> Nil);\n\n (* --- Core scope stack operations --- *)\n\n register \"scope-push!\" (fun args ->\n match args with\n | [String name; value] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n if !_scope_trace then\n _scope_log := Printf.sprintf \"PUSH %s depth=%d->%d\" name (List.length stack) (List.length stack + 1) :: !_scope_log;\n Hashtbl.replace scope_stacks name (value :: stack); Nil\n | _ -> Nil);\n\n register \"scope-pop!\" (fun args ->\n match args with\n | [String name] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n if !_scope_trace then\n _scope_log := Printf.sprintf \"POP %s depth=%d->%d\" name (List.length stack) (max 0 (List.length stack - 1)) :: !_scope_log;\n (match stack with _ :: rest -> Hashtbl.replace scope_stacks name rest | [] -> ()); Nil\n | _ -> Nil);\n\n register \"scope-peek\" (fun args ->\n match args with\n | [String name] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n if !_scope_trace then\n _scope_log := Printf.sprintf \"PEEK %s depth=%d found=%b\" name (List.length stack) (stack <> []) :: !_scope_log;\n (match stack with v :: _ -> v | [] -> Nil)\n | _ -> Nil);\n\n (* --- Context (scope lookup with optional default) --- *)\n\n register \"context\" (fun args ->\n match args with\n | (String name) :: rest ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n if !_scope_trace then\n _scope_log := Printf.sprintf \"CTX %s depth=%d found=%b\" name (List.length stack) (stack <> []) :: !_scope_log;\n (match stack with\n | v :: _ -> v\n | [] -> (match rest with default_val :: _ -> default_val | [] -> Nil))\n | _ -> Nil);\n\n register \"context-debug\" (fun args ->\n match args with\n | [String name] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n let all_keys = Hashtbl.fold (fun k _ acc -> k :: acc) scope_stacks [] in\n String (Printf.sprintf \"name=%s stack_len=%d all_keys=[%s]\"\n name (List.length stack) (String.concat \",\" all_keys))\n | _ -> String \"bad args\");\n\n (* --- Collect / collected / clear-collected! --- *)\n\n register \"collect!\" (fun args ->\n match args with\n | [String name; value] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n (match stack with\n | List items :: rest ->\n if not (List.mem value items) then\n Hashtbl.replace scope_stacks name (List (items @ [value]) :: rest)\n | [] ->\n Hashtbl.replace scope_stacks name [List [value]]\n | _ :: _ -> ());\n Nil\n | _ -> Nil);\n\n register \"collected\" (fun args ->\n match args with\n | [String name] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n (match stack with List items :: _ -> List items | _ -> List [])\n | _ -> List []);\n\n register \"clear-collected!\" (fun args ->\n match args with\n | [String name] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n (match stack with\n | _ :: rest -> Hashtbl.replace scope_stacks name (List [] :: rest)\n | [] -> Hashtbl.replace scope_stacks name [List []]);\n Nil\n | _ -> Nil);\n\n (* --- Emit / emitted (for spread attrs in adapter-html.sx) --- *)\n\n register \"scope-emit!\" (fun args ->\n match args with\n | [String name; value] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n (match stack with\n | List items :: rest ->\n Hashtbl.replace scope_stacks name (List (items @ [value]) :: rest)\n | Nil :: rest ->\n Hashtbl.replace scope_stacks name (List [value] :: rest)\n | [] ->\n Hashtbl.replace scope_stacks name [List [value]]\n | _ :: _ -> ());\n Nil\n | _ -> Nil);\n\n register \"emit!\" (fun args ->\n (* Alias for scope-emit! *)\n match Sx_primitives.get_primitive \"scope-emit!\" with\n | NativeFn (_, fn) -> fn args | _ -> Nil);\n\n register \"emitted\" (fun args ->\n match args with\n | [String name] ->\n let stack = try Hashtbl.find scope_stacks name with Not_found -> [] in\n (match stack with List items :: _ -> List items | _ -> List [])\n | _ -> List []);\n\n register \"scope-emitted\" (fun args ->\n match Sx_primitives.get_primitive \"emitted\" with\n | NativeFn (_, fn) -> fn args | _ -> List []);\n\n register \"scope-collected\" (fun args ->\n match Sx_primitives.get_primitive \"collected\" with\n | NativeFn (_, fn) -> fn args | _ -> List []);\n\n register \"scope-clear-collected!\" (fun args ->\n match Sx_primitives.get_primitive \"clear-collected!\" with\n | NativeFn (_, fn) -> fn args | _ -> Nil);\n\n (* --- Provide aliases --- *)\n\n register \"provide-push!\" (fun args ->\n match Sx_primitives.get_primitive \"scope-push!\" with\n | NativeFn (_, fn) -> fn args | _ -> Nil);\n\n register \"provide-pop!\" (fun args ->\n match Sx_primitives.get_primitive \"scope-pop!\" with\n | NativeFn (_, fn) -> fn args | _ -> Nil)\n","(* generated code 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HTML renderer for SX values.\n\n Extracted from run_tests.ml — renders an SX expression tree to an\n HTML string, expanding components and macros along the way.\n\n Depends on [Sx_ref.eval_expr] for evaluating sub-expressions\n during rendering (keyword arg values, conditionals, etc.). *)\n\nopen Sx_types\n\n(* ====================================================================== *)\n(* Tag / attribute registries *)\n(* ====================================================================== *)\n\nlet html_tags = [\n \"html\"; \"head\"; \"body\"; \"title\"; \"meta\"; \"link\"; \"script\"; \"style\"; \"noscript\";\n \"header\"; \"nav\"; \"main\"; \"section\"; \"article\"; \"aside\"; \"footer\";\n \"h1\"; \"h2\"; \"h3\"; \"h4\"; \"h5\"; \"h6\"; \"hgroup\";\n \"div\"; \"p\"; \"blockquote\"; \"pre\"; \"figure\"; \"figcaption\"; \"address\"; \"hr\";\n \"ul\"; \"ol\"; \"li\"; \"dl\"; \"dt\"; \"dd\"; \"menu\";\n \"a\"; \"span\"; \"em\"; \"strong\"; \"small\"; \"b\"; \"i\"; \"u\"; \"s\"; \"sub\"; \"sup\";\n \"mark\"; \"del\"; \"ins\"; \"q\"; \"cite\"; \"dfn\"; \"abbr\"; \"code\"; \"var\"; \"samp\";\n \"kbd\"; \"data\"; \"time\"; \"ruby\"; \"rt\"; \"rp\"; \"bdi\"; \"bdo\"; \"wbr\"; \"br\";\n \"table\"; \"thead\"; \"tbody\"; \"tfoot\"; \"tr\"; \"th\"; \"td\"; \"caption\"; \"colgroup\"; \"col\";\n \"form\"; \"input\"; \"textarea\"; \"select\"; \"option\"; \"optgroup\"; \"button\"; \"label\";\n \"fieldset\"; \"legend\"; \"datalist\"; \"output\"; \"progress\"; \"meter\";\n \"details\"; \"summary\"; \"dialog\";\n \"img\"; \"video\"; \"audio\"; \"source\"; \"picture\"; \"canvas\"; \"iframe\"; \"embed\"; \"object\"; \"param\";\n \"svg\"; \"path\"; \"circle\"; \"rect\"; \"line\"; \"polyline\"; \"polygon\"; \"ellipse\";\n \"g\"; \"defs\"; \"use\"; \"text\"; \"tspan\"; \"clipPath\"; \"mask\"; \"pattern\";\n \"linearGradient\"; \"radialGradient\"; \"stop\"; \"filter\"; \"feBlend\"; \"feFlood\";\n \"feGaussianBlur\"; \"feOffset\"; \"feMerge\"; \"feMergeNode\"; \"feComposite\";\n \"template\"; \"slot\";\n]\n\nlet void_elements = [\n \"area\"; \"base\"; \"br\"; \"col\"; \"embed\"; \"hr\"; \"img\"; \"input\";\n \"link\"; \"meta\"; \"param\"; \"source\"; \"track\"; \"wbr\"\n]\n\nlet boolean_attrs = [\n \"async\"; \"autofocus\"; \"autoplay\"; \"checked\"; \"controls\"; \"default\";\n \"defer\"; \"disabled\"; \"formnovalidate\"; \"hidden\"; \"inert\"; \"ismap\";\n \"loop\"; \"multiple\"; \"muted\"; \"nomodule\"; \"novalidate\"; \"open\";\n \"playsinline\"; \"readonly\"; \"required\"; \"reversed\"; \"selected\"\n]\n\nlet is_html_tag name = List.mem name html_tags\nlet is_void name = List.mem name void_elements\nlet is_boolean_attr name = List.mem name boolean_attrs\n\n\n(* ====================================================================== *)\n(* HTML escaping *)\n(* ====================================================================== *)\n\nlet escape_html s =\n let buf = Buffer.create (String.length s) in\n String.iter (function\n | '&' -> Buffer.add_string buf \"&\"\n | '<' -> Buffer.add_string buf \"<\"\n | '>' -> Buffer.add_string buf \">\"\n | '\"' -> Buffer.add_string buf \""\"\n | c -> Buffer.add_char buf c) s;\n Buffer.contents buf\n\n\n(* ====================================================================== *)\n(* Attribute rendering *)\n(* ====================================================================== *)\n\nlet render_attrs attrs =\n let buf = Buffer.create 64 in\n Hashtbl.iter (fun k v ->\n if is_boolean_attr k then begin\n if sx_truthy v then begin\n Buffer.add_char buf ' ';\n Buffer.add_string buf k\n end\n end else if not (is_nil v) then begin\n Buffer.add_char buf ' ';\n Buffer.add_string buf k;\n Buffer.add_string buf \"=\\\"\";\n Buffer.add_string buf (escape_html (value_to_string v));\n Buffer.add_char buf '\"'\n end) attrs;\n Buffer.contents buf\n\n\n(* ====================================================================== *)\n(* HTML renderer *)\n(* ====================================================================== *)\n\n(* Forward ref — resolved at setup time *)\nlet render_to_html_ref : (value -> env -> string) ref =\n ref (fun _expr _env -> \"\")\n\nlet render_to_html expr env = !render_to_html_ref expr env\n\n(** Render via the SX adapter (render-to-html from adapter-html.sx).\n Falls back to the native ref if the SX adapter isn't loaded. *)\nlet sx_render_to_html render_env expr eval_env =\n if env_has render_env \"render-to-html\" then\n let fn = env_get render_env \"render-to-html\" in\n let result = Sx_ref.cek_call fn (List [expr; Env eval_env]) in\n match result with String s -> s | RawHTML s -> s | _ -> Sx_runtime.value_to_str result\n else\n render_to_html expr eval_env\n\nlet render_children children env =\n String.concat \"\" (List.map (fun c -> render_to_html c env) children)\n\n(** Parse keyword attrs and positional children from an element call's args.\n Attrs are evaluated; children are returned UNEVALUATED for render dispatch. *)\nlet parse_element_args args env =\n let attrs = Hashtbl.create 8 in\n let children = ref [] in\n let skip = ref false in\n let len = List.length args in\n List.iteri (fun idx arg ->\n if !skip then skip := false\n else match arg with\n | Keyword k when idx + 1 < len ->\n let v = Sx_ref.eval_expr (List.nth args (idx + 1)) (Env env) in\n Hashtbl.replace attrs k v;\n skip := true\n | Spread pairs ->\n List.iter (fun (k, v) -> Hashtbl.replace attrs k v) pairs\n | _ ->\n children := arg :: !children\n ) args;\n (attrs, List.rev !children)\n\nlet render_html_element tag args env =\n let (attrs, children) = parse_element_args args env in\n let attr_str = render_attrs attrs in\n if is_void tag then\n \"<\" ^ tag ^ attr_str ^ \" />\"\n else\n let content = String.concat \"\"\n (List.map (fun c -> render_to_html c env) children) in\n \"<\" ^ tag ^ attr_str ^ \">\" ^ content ^ \"</\" ^ tag ^ \">\"\n\nlet render_component comp args env =\n match comp with\n | Component c ->\n let kwargs = Hashtbl.create 8 in\n let children_exprs = ref [] in\n let skip = ref false in\n let len = List.length args in\n List.iteri (fun idx arg ->\n if !skip then skip := false\n else match arg with\n | Keyword k when idx + 1 < len ->\n let v = Sx_ref.eval_expr (List.nth args (idx + 1)) (Env env) in\n Hashtbl.replace kwargs k v;\n skip := true\n | _ ->\n children_exprs := arg :: !children_exprs\n ) args;\n let children = List.rev !children_exprs in\n let local = env_merge c.c_closure env in\n List.iter (fun p ->\n let v = match Hashtbl.find_opt kwargs p with Some v -> v | None -> Nil in\n ignore (env_bind local p v)\n ) c.c_params;\n if c.c_has_children then begin\n let rendered_children = String.concat \"\"\n (List.map (fun c -> render_to_html c env) children) in\n ignore (env_bind local \"children\" (RawHTML rendered_children))\n end;\n render_to_html c.c_body local\n | _ -> \"\"\n\nlet expand_macro (m : macro) args _env =\n let local = env_extend m.m_closure in\n let params = m.m_params in\n let rec bind_params ps as' =\n match ps, as' with\n | [], rest ->\n (match m.m_rest_param with\n | Some rp -> ignore (env_bind local rp (List rest))\n | None -> ())\n | p :: ps_rest, a :: as_rest ->\n ignore (env_bind local p a);\n bind_params ps_rest as_rest\n | _ :: _, [] ->\n List.iter (fun p -> ignore (env_bind local p Nil)) (List.rev ps)\n in\n bind_params params args;\n Sx_ref.eval_expr m.m_body (Env local)\n\nlet rec do_render_to_html (expr : value) (env : env) : string =\n match expr with\n | Nil -> \"\"\n | Bool true -> \"true\"\n | Bool false -> \"false\"\n | Number n ->\n if Float.is_integer n then string_of_int (int_of_float n)\n else Printf.sprintf \"%g\" n\n | String s -> escape_html s\n | Keyword k -> escape_html k\n | RawHTML s -> s\n | SxExpr s -> s\n | Symbol s ->\n let v = Sx_ref.eval_expr (Symbol s) (Env env) in\n do_render_to_html v env\n | List [] | ListRef { contents = [] } -> \"\"\n | List (head :: args) | ListRef { contents = head :: args } ->\n render_list_to_html head args env\n | _ ->\n let v = Sx_ref.eval_expr expr (Env env) in\n do_render_to_html v env\n\nand render_list_to_html head args env =\n match head with\n | Symbol \"<>\" ->\n render_children args env\n | Symbol \"raw!\" ->\n (* Inject pre-rendered HTML without escaping *)\n let v = Sx_ref.eval_expr (List.hd args) (Env env) in\n (match v with\n | String s | RawHTML s -> s\n | _ -> value_to_string v)\n | Symbol tag when is_html_tag tag ->\n render_html_element tag args env\n | Symbol \"if\" ->\n let cond_val = Sx_ref.eval_expr (List.hd args) (Env env) in\n if sx_truthy cond_val then\n (if List.length args > 1 then do_render_to_html (List.nth args 1) env else \"\")\n else\n (if List.length args > 2 then do_render_to_html (List.nth args 2) env else \"\")\n | Symbol \"when\" ->\n let cond_val = Sx_ref.eval_expr (List.hd args) (Env env) in\n if sx_truthy cond_val then\n String.concat \"\" (List.map (fun e -> do_render_to_html e env) (List.tl args))\n else \"\"\n | Symbol \"cond\" ->\n render_cond args env\n | Symbol \"case\" ->\n let v = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n do_render_to_html v env\n | Symbol (\"let\" | \"let*\") ->\n render_let args env\n | Symbol (\"begin\" | \"do\") ->\n let rec go = function\n | [] -> \"\"\n | [last] -> do_render_to_html last env\n | e :: rest ->\n ignore (Sx_ref.eval_expr e (Env env));\n go rest\n in go args\n | Symbol (\"define\" | \"defcomp\" | \"defmacro\" | \"defisland\") ->\n ignore (Sx_ref.eval_expr (List (head :: args)) (Env env));\n \"\"\n | Symbol \"map\" ->\n render_map args env false\n | Symbol \"map-indexed\" ->\n render_map args env true\n | Symbol \"filter\" ->\n let v = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n do_render_to_html v env\n | Symbol \"for-each\" ->\n render_for_each args env\n | Symbol name ->\n (try\n let v = env_get env name in\n (match v with\n | Component c when c.c_affinity = \"client\" -> \"\" (* skip client-only *)\n | Component _ -> render_component v args env\n | Island _i ->\n let call_sx = \"(\" ^ String.concat \" \" (List.map (fun v ->\n match v with\n | Symbol s -> s | Keyword k -> \":\" ^ k | String s -> \"\\\"\" ^ s ^ \"\\\"\"\n | _ -> Sx_runtime.value_to_str v\n ) (Symbol name :: args)) ^ \")\" in\n Printf.sprintf \"<span data-sx-island=\\\"%s\\\">%s</span>\" _i.i_name call_sx\n | Macro m ->\n let expanded = expand_macro m args env in\n do_render_to_html expanded env\n | _ ->\n let result = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n do_render_to_html result env)\n with Eval_error _ ->\n (* Primitive or special form — not in env, delegate to CEK *)\n (try\n let result = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n do_render_to_html result env\n with Eval_error _ -> \"\"))\n | _ ->\n let result = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n do_render_to_html result env\n\nand render_cond args env =\n let as_list = function List l | ListRef { contents = l } -> Some l | _ -> None in\n let is_scheme = List.for_all (fun a -> match as_list a with\n | Some items when List.length items = 2 -> true\n | _ -> false) args\n in\n if is_scheme then begin\n let rec go = function\n | [] -> \"\"\n | clause :: rest ->\n (match as_list clause with\n | Some [test; body] ->\n let is_else = match test with\n | Keyword \"else\" -> true\n | Symbol \"else\" | Symbol \":else\" -> true\n | _ -> false\n in\n if is_else then do_render_to_html body env\n else\n let v = Sx_ref.eval_expr test (Env env) in\n if sx_truthy v then do_render_to_html body env\n else go rest\n | _ -> \"\")\n in go args\n end else begin\n let rec go = function\n | [] -> \"\"\n | [_] -> \"\"\n | test :: body :: rest ->\n let is_else = match test with\n | Keyword \"else\" -> true\n | Symbol \"else\" | Symbol \":else\" -> true\n | _ -> false\n in\n if is_else then do_render_to_html body env\n else\n let v = Sx_ref.eval_expr test (Env env) in\n if sx_truthy v then do_render_to_html body env\n else go rest\n in go args\n end\n\nand render_let args env =\n let as_list = function List l | ListRef { contents = l } -> Some l | _ -> None in\n let bindings_expr = List.hd args in\n let body = List.tl args in\n let local = env_extend env in\n let bindings = match as_list bindings_expr with Some l -> l | None -> [] in\n let is_scheme = match bindings with\n | (List _ :: _) | (ListRef _ :: _) -> true\n | _ -> false\n in\n if is_scheme then\n List.iter (fun b ->\n match as_list b with\n | Some [Symbol name; expr] | Some [String name; expr] ->\n let v = Sx_ref.eval_expr expr (Env local) in\n ignore (env_bind local name v)\n | _ -> ()\n ) bindings\n else begin\n let rec go = function\n | [] -> ()\n | (Symbol name) :: expr :: rest | (String name) :: expr :: rest ->\n let v = Sx_ref.eval_expr expr (Env local) in\n ignore (env_bind local name v);\n go rest\n | _ -> ()\n in go bindings\n end;\n let rec render_body = function\n | [] -> \"\"\n | [last] -> do_render_to_html last local\n | e :: rest ->\n ignore (Sx_ref.eval_expr e (Env local));\n render_body rest\n in render_body body\n\nand render_map args env indexed =\n let (fn_val, coll_val) = match args with\n | [a; b] ->\n let va = Sx_ref.eval_expr a (Env env) in\n let vb = Sx_ref.eval_expr b (Env env) in\n (match va, vb with\n | (Lambda _ | NativeFn _), _ -> (va, vb)\n | _, (Lambda _ | NativeFn _) -> (vb, va)\n | _ -> (va, vb))\n | _ -> (Nil, Nil)\n in\n let items = match coll_val with List l | ListRef { contents = l } -> l | _ -> [] in\n String.concat \"\" (List.mapi (fun i item ->\n let call_args = if indexed then [Number (float_of_int i); item] else [item] in\n match fn_val with\n | Lambda l ->\n let local = env_extend l.l_closure in\n List.iter2 (fun p a -> ignore (env_bind local p a))\n l.l_params call_args;\n do_render_to_html l.l_body local\n | _ ->\n let result = Sx_runtime.sx_call fn_val call_args in\n do_render_to_html result env\n ) items)\n\nand render_for_each args env =\n let (fn_val, coll_val) = match args with\n | [a; b] ->\n let va = Sx_ref.eval_expr a (Env env) in\n let vb = Sx_ref.eval_expr b (Env env) in\n (match va, vb with\n | (Lambda _ | NativeFn _), _ -> (va, vb)\n | _, (Lambda _ | NativeFn _) -> (vb, va)\n | _ -> (va, vb))\n | _ -> (Nil, Nil)\n in\n let items = match coll_val with List l | ListRef { contents = l } -> l | _ -> [] in\n String.concat \"\" (List.map (fun item ->\n match fn_val with\n | Lambda l ->\n let local = env_extend l.l_closure in\n List.iter2 (fun p a -> ignore (env_bind local p a))\n l.l_params [item];\n do_render_to_html l.l_body local\n | _ ->\n let result = Sx_runtime.sx_call fn_val [item] in\n do_render_to_html result env\n ) items)\n\n\n(* ====================================================================== *)\n(* Buffer-based streaming renderer — zero intermediate string allocation *)\n(* ====================================================================== *)\n\n(** Escape HTML directly into a buffer. *)\nlet escape_html_buf buf s =\n for i = 0 to String.length s - 1 do\n match String.unsafe_get s i with\n | '&' -> Buffer.add_string buf \"&\"\n | '<' -> Buffer.add_string buf \"<\"\n | '>' -> Buffer.add_string buf \">\"\n | '\"' -> Buffer.add_string buf \""\"\n | c -> Buffer.add_char buf c\n done\n\n(** Render attributes directly into a buffer. *)\nlet render_attrs_buf buf attrs =\n Hashtbl.iter (fun k v ->\n if is_boolean_attr k then begin\n if sx_truthy v then begin\n Buffer.add_char buf ' ';\n Buffer.add_string buf k\n end\n end else if not (is_nil v) then begin\n Buffer.add_char buf ' ';\n Buffer.add_string buf k;\n Buffer.add_string buf \"=\\\"\";\n escape_html_buf buf (value_to_string v);\n Buffer.add_char buf '\"'\n end) attrs\n\n(** Buffer-based render_to_html — writes directly, no intermediate strings. *)\nlet rec render_to_buf buf (expr : value) (env : env) : unit =\n match expr with\n | Nil -> ()\n | Bool true -> Buffer.add_string buf \"true\"\n | Bool false -> Buffer.add_string buf \"false\"\n | Number n ->\n if Float.is_integer n then Buffer.add_string buf (string_of_int (int_of_float n))\n else Buffer.add_string buf (Printf.sprintf \"%g\" n)\n | String s -> escape_html_buf buf s\n | Keyword k -> escape_html_buf buf k\n | RawHTML s -> Buffer.add_string buf s\n | SxExpr s -> Buffer.add_string buf s\n | Symbol s ->\n let v = Sx_ref.eval_expr (Symbol s) (Env env) in\n render_to_buf buf v env\n | List [] | ListRef { contents = [] } -> ()\n | List (head :: args) | ListRef { contents = head :: args } ->\n render_list_buf buf head args env\n | _ ->\n let v = Sx_ref.eval_expr expr (Env env) in\n render_to_buf buf v env\n\nand render_list_buf buf head args env =\n match head with\n | Symbol \"<>\" ->\n List.iter (fun c -> render_to_buf buf c env) args\n | Symbol \"raw!\" ->\n let v = Sx_ref.eval_expr (List.hd args) (Env env) in\n (match v with\n | String s | RawHTML s -> Buffer.add_string buf s\n | _ -> Buffer.add_string buf (value_to_string v))\n | Symbol tag when is_html_tag tag ->\n render_element_buf buf tag args env\n | Symbol \"if\" ->\n let cond_val = Sx_ref.eval_expr (List.hd args) (Env env) in\n if sx_truthy cond_val then\n (if List.length args > 1 then render_to_buf buf (List.nth args 1) env)\n else\n (if List.length args > 2 then render_to_buf buf (List.nth args 2) env)\n | Symbol \"when\" ->\n let cond_val = Sx_ref.eval_expr (List.hd args) (Env env) in\n if sx_truthy cond_val then\n List.iter (fun e -> render_to_buf buf e env) (List.tl args)\n | Symbol \"cond\" ->\n render_cond_buf buf args env\n | Symbol \"case\" ->\n let v = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n render_to_buf buf v env\n | Symbol (\"let\" | \"let*\") ->\n render_let_buf buf args env\n | Symbol (\"begin\" | \"do\") ->\n let rec go = function\n | [] -> ()\n | [last] -> render_to_buf buf last env\n | e :: rest -> ignore (Sx_ref.eval_expr e (Env env)); go rest\n in go args\n | Symbol (\"define\" | \"defcomp\" | \"defmacro\" | \"defisland\") ->\n ignore (Sx_ref.eval_expr (List (head :: args)) (Env env))\n | Symbol \"map\" -> render_map_buf buf args env false\n | Symbol \"map-indexed\" -> render_map_buf buf args env true\n | Symbol \"filter\" ->\n let v = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n render_to_buf buf v env\n | Symbol \"for-each\" -> render_for_each_buf buf args env\n | Symbol name ->\n (try\n let v = env_get env name in\n (match v with\n | Component c when c.c_affinity = \"client\" -> ()\n | Component _ -> render_component_buf buf v args env\n | Island _i ->\n (* Islands are client-rendered — emit placeholder with SX call\n expression so the client can hydrate from source. *)\n let call_sx = \"(\" ^ String.concat \" \" (List.map (fun v ->\n match v with\n | Symbol s -> s | Keyword k -> \":\" ^ k | String s -> \"\\\"\" ^ s ^ \"\\\"\"\n | _ -> Sx_runtime.value_to_str v\n ) (Symbol name :: args)) ^ \")\" in\n Buffer.add_string buf (Printf.sprintf \"<span data-sx-island=\\\"%s\\\">%s</span>\"\n _i.i_name call_sx)\n | Macro m ->\n let expanded = expand_macro m args env in\n render_to_buf buf expanded env\n | _ ->\n let result = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n render_to_buf buf result env)\n with Eval_error msg ->\n (* Unknown symbol/component — skip silently during SSR.\n The client will render from page-sx. *)\n Printf.eprintf \"[ssr-skip] %s\\n%!\" msg)\n | _ ->\n (try\n let result = Sx_ref.eval_expr (List (head :: args)) (Env env) in\n render_to_buf buf result env\n with Eval_error msg ->\n Printf.eprintf \"[ssr-skip] %s\\n%!\" msg)\n\nand render_element_buf buf tag args env =\n let (attrs, children) = parse_element_args args env in\n Buffer.add_char buf '<';\n Buffer.add_string buf tag;\n render_attrs_buf buf attrs;\n if is_void tag then\n Buffer.add_string buf \" />\"\n else begin\n Buffer.add_char buf '>';\n List.iter (fun c -> render_to_buf buf c env) children;\n Buffer.add_string buf \"</\";\n Buffer.add_string buf tag;\n Buffer.add_char buf '>'\n end\n\nand render_component_buf buf comp args env =\n match comp with\n | Component c ->\n let kwargs = Hashtbl.create 8 in\n let children_exprs = ref [] in\n let skip = ref false in\n let len = List.length args in\n List.iteri (fun idx arg ->\n if !skip then skip := false\n else match arg with\n | Keyword k when idx + 1 < len ->\n let v = Sx_ref.eval_expr (List.nth args (idx + 1)) (Env env) in\n Hashtbl.replace kwargs k v;\n skip := true\n | _ -> children_exprs := arg :: !children_exprs\n ) args;\n let children = List.rev !children_exprs in\n let local = env_merge c.c_closure env in\n List.iter (fun p ->\n let v = match Hashtbl.find_opt kwargs p with Some v -> v | None -> Nil in\n ignore (env_bind local p v)\n ) c.c_params;\n if c.c_has_children then begin\n let child_buf = Buffer.create 256 in\n List.iter (fun c -> render_to_buf child_buf c env) children;\n ignore (env_bind local \"children\" (RawHTML (Buffer.contents child_buf)))\n end;\n render_to_buf buf c.c_body local\n | _ -> ()\n\nand render_cond_buf buf args env =\n let as_list = function List l | ListRef { contents = l } -> Some l | _ -> None in\n let is_scheme = List.for_all (fun a -> match as_list a with\n | Some items when List.length items = 2 -> true | _ -> false) args in\n if is_scheme then begin\n let rec go = function\n | [] -> ()\n | clause :: rest ->\n (match as_list clause with\n | Some [test; body] ->\n let is_else = match test with\n | Keyword \"else\" | Symbol \"else\" | Symbol \":else\" -> true | _ -> false in\n if is_else then render_to_buf buf body env\n else let v = Sx_ref.eval_expr test (Env env) in\n if sx_truthy v then render_to_buf buf body env else go rest\n | _ -> ())\n in go args\n end else begin\n let rec go = function\n | [] -> () | [_] -> ()\n | test :: body :: rest ->\n let is_else = match test with\n | Keyword \"else\" | Symbol \"else\" | Symbol \":else\" -> true | _ -> false in\n if is_else then render_to_buf buf body env\n else let v = Sx_ref.eval_expr test (Env env) in\n if sx_truthy v then render_to_buf buf body env else go rest\n in go args\n end\n\nand render_let_buf buf args env =\n let as_list = function List l | ListRef { contents = l } -> Some l | _ -> None in\n let bindings_expr = List.hd args in\n let body = List.tl args in\n let local = env_extend env in\n let bindings = match as_list bindings_expr with Some l -> l | None -> [] in\n let is_scheme = match bindings with (List _ :: _) | (ListRef _ :: _) -> true | _ -> false in\n if is_scheme then\n List.iter (fun b ->\n match as_list b with\n | Some [Symbol name; expr] | Some [String name; expr] ->\n let v = Sx_ref.eval_expr expr (Env local) in\n ignore (env_bind local name v)\n | _ -> ()\n ) bindings\n else begin\n let rec go = function\n | [] -> ()\n | (Symbol name) :: expr :: rest | (String name) :: expr :: rest ->\n let v = Sx_ref.eval_expr expr (Env local) in\n ignore (env_bind local name v); go rest\n | _ -> ()\n in go bindings\n end;\n let rec render_body = function\n | [] -> ()\n | [last] -> render_to_buf buf last local\n | e :: rest -> ignore (Sx_ref.eval_expr e (Env local)); render_body rest\n in render_body body\n\nand render_map_buf buf args env indexed =\n let (fn_val, coll_val) = match args with\n | [a; b] ->\n let va = Sx_ref.eval_expr a (Env env) in\n let vb = Sx_ref.eval_expr b (Env env) in\n (match va, vb with\n | (Lambda _ | NativeFn _), _ -> (va, vb)\n | _, (Lambda _ | NativeFn _) -> (vb, va)\n | _ -> (va, vb))\n | _ -> (Nil, Nil)\n in\n let items = match coll_val with List l | ListRef { contents = l } -> l | _ -> [] in\n List.iteri (fun i item ->\n let call_args = if indexed then [Number (float_of_int i); item] else [item] in\n match fn_val with\n | Lambda l ->\n let local = env_extend l.l_closure in\n List.iter2 (fun p a -> ignore (env_bind local p a)) l.l_params call_args;\n render_to_buf buf l.l_body local\n | _ ->\n let result = Sx_runtime.sx_call fn_val call_args in\n render_to_buf buf result env\n ) items\n\nand render_for_each_buf buf args env =\n let (fn_val, coll_val) = match args with\n | [a; b] ->\n let va = Sx_ref.eval_expr a (Env env) in\n let vb = Sx_ref.eval_expr b (Env env) in\n (match va, vb with\n | (Lambda _ | NativeFn _), _ -> (va, vb)\n | _, (Lambda _ | NativeFn _) -> (vb, va)\n | _ -> (va, vb))\n | _ -> (Nil, Nil)\n in\n let items = match coll_val with List l | ListRef { contents = l } -> l | _ -> [] in\n List.iter (fun item ->\n match fn_val with\n | Lambda l ->\n let local = env_extend l.l_closure in\n List.iter2 (fun p a -> ignore (env_bind local p a)) l.l_params [item];\n render_to_buf buf l.l_body local\n | _ ->\n let result = Sx_runtime.sx_call fn_val [item] in\n render_to_buf buf result env\n ) items\n\n(** Public API: render to a pre-allocated buffer. *)\nlet render_to_buffer buf expr env = render_to_buf buf expr env\n\n(** Convenience: render to string using the buffer renderer. *)\nlet render_to_html_streaming expr env =\n let buf = Buffer.create 65536 in\n render_to_buf buf expr env;\n Buffer.contents buf\n\n\n(* ====================================================================== *)\n(* Setup — bind render primitives in an env and wire up the ref *)\n(* ====================================================================== *)\n\nlet setup_render_env env =\n render_to_html_ref := do_render_to_html;\n\n let bind name fn =\n ignore (env_bind env name (NativeFn (name, fn)))\n in\n\n bind \"render-html\" (fun args ->\n match args with\n | [String src] ->\n let exprs = Sx_parser.parse_all src in\n let expr = match exprs with\n | [e] -> e\n | [] -> Nil\n | _ -> List (Symbol \"do\" :: exprs)\n in\n String (render_to_html expr env)\n | [expr] ->\n String (render_to_html expr env)\n | [expr; Env e] ->\n String (render_to_html expr e)\n | _ -> String \"\");\n\n bind \"render-to-html\" (fun args ->\n match args with\n | [String src] ->\n let exprs = Sx_parser.parse_all src in\n let expr = match exprs with\n | [e] -> e\n | [] -> Nil\n | _ -> List (Symbol \"do\" :: exprs)\n in\n String (render_to_html expr env)\n | [expr] ->\n String (render_to_html expr env)\n | [expr; Env e] ->\n String (render_to_html expr e)\n | _ -> String \"\")\n","(* generated code 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sx_compiler.ml — Auto-generated from lib/compiler.sx *)\n(* Do not edit — regenerate with: python3 hosts/ocaml/bootstrap_compiler.py *)\n\n[@@@warning \"-26-27\"]\n\nopen Sx_types\nopen Sx_runtime\n\n(* The compiler uses cek_call from the evaluator for runtime dispatch *)\nlet cek_call = Sx_ref.cek_call\nlet eval_expr = Sx_ref.eval_expr\nlet trampoline v = match v with\n | Thunk (expr, env) -> Sx_ref.eval_expr expr (Env env)\n | other -> other\n\n(* Bindings for external functions the compiler calls.\n Some shadow OCaml stdlib names — the SX versions operate on values. *)\nlet serialize v = String (Sx_types.inspect v)\nlet sx_parse v = match v with\n | String s -> (match Sx_parser.parse_all s with [e] -> e | es -> List es)\n | v -> v\nlet floor v = prim_call \"floor\" [v]\nlet abs v = prim_call \"abs\" [v]\nlet min a b = prim_call \"min\" [a; b]\nlet max a b = prim_call \"max\" [a; b]\nlet set_nth_b lst idx v = prim_call \"set-nth!\" [lst; idx; v]\nlet init lst = prim_call \"init\" [lst]\nlet last lst = prim_call \"last\" [lst]\n\n(* skip_annotations: strips :keyword value pairs from a list (type annotations) *)\nlet rec skip_annotations items =\n match items with\n | List [] | Nil -> Nil\n | List (Keyword _ :: _ :: rest) -> skip_annotations (List rest)\n | ListRef { contents = [] } -> Nil\n | ListRef { contents = Keyword _ :: _ :: rest } -> skip_annotations (List rest)\n | List (first :: _) -> first\n | ListRef { contents = first :: _ } -> first\n | _ -> Nil\n\n(* compile_match: uses local recursion (letrec) that the transpiler can't handle.\n Falls back to CEK evaluation at runtime. *)\nlet compile_match em args scope tail_p =\n let fn = Sx_ref.eval_expr (Symbol \"compile-match\") (Env (Sx_types.make_env ())) in\n Sx_ref.cek_call fn (List [em; args; scope; tail_p])\n\n\n(* === Transpiled from bytecode compiler === *)\n(* make-pool *)\nlet rec make_pool () =\n (let _d = Hashtbl.create 2 in Hashtbl.replace _d \"entries\" (if sx_truthy ((is_primitive ((String \"mutable-list\")))) then (mutable_list ()) else (List [])); Hashtbl.replace _d \"index\" (let _d = Hashtbl.create 1 in Hashtbl.replace _d \"_count\" (Number 0.0); Dict _d); Dict _d)\n\n(* pool-add *)\nand pool_add pool value =\n (let () = ignore ((String \"Add a value to the constant pool, return its index. Deduplicates.\")) in (let key = (serialize (value)) in let idx_map = (get (pool) ((String \"index\"))) in (if sx_truthy ((prim_call \"has-key?\" [idx_map; key])) then (get (idx_map) (key)) else (let idx = (get (idx_map) ((String \"_count\"))) in (let () = ignore ((sx_dict_set_b idx_map key idx)) in (let () = ignore ((sx_dict_set_b idx_map (String \"_count\") (prim_call \"+\" [idx; (Number 1.0)]))) in (let () = ignore ((sx_append_b (get (pool) ((String \"entries\"))) value)) in idx)))))))\n\n(* make-scope *)\nand make_scope parent =\n (let _d = Hashtbl.create 5 in Hashtbl.replace _d \"next-slot\" (Number 0.0); Hashtbl.replace _d \"upvalues\" (List []); Hashtbl.replace _d \"locals\" (List []); Hashtbl.replace _d \"parent\" parent; Hashtbl.replace _d \"is-function\" (Bool false); Dict _d)\n\n(* scope-define-local *)\nand scope_define_local scope name =\n (let () = ignore ((String \"Add a local variable, return its slot index.\\n Idempotent: if name already has a slot, return it.\")) in (let existing = (first ((List (List.filter (fun l -> sx_truthy ((prim_call \"=\" [(get (l) ((String \"name\"))); name]))) (sx_to_list (get (scope) ((String \"locals\")))))))) in (if sx_truthy (existing) then (get (existing) ((String \"slot\"))) else (let slot = (get (scope) ((String \"next-slot\"))) in (let () = ignore ((sx_append_b (get (scope) ((String \"locals\"))) (let _d = Hashtbl.create 3 in Hashtbl.replace _d \"mutable\" (Bool false); Hashtbl.replace _d \"slot\" slot; Hashtbl.replace _d \"name\" name; Dict _d))) in (let () = ignore ((sx_dict_set_b scope (String \"next-slot\") (prim_call \"+\" [slot; (Number 1.0)]))) in slot))))))\n\n(* scope-resolve *)\nand scope_resolve scope name =\n (let () = ignore ((String \"Resolve a variable name. Returns {:type \\\"local\\\"|\\\"upvalue\\\"|\\\"global\\\", :index N}.\\n Upvalue captures only happen at function boundaries (is-function=true).\\n Let scopes share the enclosing function's frame — their locals are\\n accessed directly without upvalue indirection.\")) in (if sx_truthy ((is_nil (scope))) then (CekFrame { cf_type = \"global\"; cf_env = Nil; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil }) else (let locals = (get (scope) ((String \"locals\"))) in let found = (Bool (List.exists (fun l -> sx_truthy ((prim_call \"=\" [(get (l) ((String \"name\"))); name]))) (sx_to_list locals))) in (if sx_truthy (found) then (let local = (first ((List (List.filter (fun l -> sx_truthy ((prim_call \"=\" [(get (l) ((String \"name\"))); name]))) (sx_to_list locals))))) in (CekFrame { cf_type = \"local\"; cf_env = Nil; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })) else (let upvals = (get (scope) ((String \"upvalues\"))) in let uv_found = (Bool (List.exists (fun u -> sx_truthy ((prim_call \"=\" [(get (u) ((String \"name\"))); name]))) (sx_to_list upvals))) in (if sx_truthy (uv_found) then (let uv = (first ((List (List.filter (fun u -> sx_truthy ((prim_call \"=\" [(get (u) ((String \"name\"))); name]))) (sx_to_list upvals))))) in (CekFrame { cf_type = \"upvalue\"; cf_env = Nil; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil })) else (let parent = (get (scope) ((String \"parent\"))) in (if sx_truthy ((is_nil (parent))) then (CekFrame { cf_type = \"global\"; cf_env = Nil; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil }) else (let parent_result = (scope_resolve (parent) (name)) in (if sx_truthy ((prim_call \"=\" [(get (parent_result) ((String \"type\"))); (String \"global\")])) then parent_result else (if sx_truthy ((get (scope) ((String \"is-function\")))) then (let uv_idx = (len ((get (scope) ((String \"upvalues\"))))) in (let () = ignore ((sx_append_b (get (scope) ((String \"upvalues\"))) (let _d = Hashtbl.create 4 in Hashtbl.replace _d \"index\" (get (parent_result) ((String \"index\"))); Hashtbl.replace _d \"is-local\" (prim_call \"=\" [(get (parent_result) ((String \"type\"))); (String \"local\")]); Hashtbl.replace _d \"uv-index\" uv_idx; Hashtbl.replace _d \"name\" name; Dict _d))) in (CekFrame { cf_type = \"upvalue\"; cf_env = Nil; cf_name = Nil; cf_body = Nil; cf_remaining = Nil; cf_f = Nil; cf_args = Nil; cf_results = Nil; cf_extra = Nil; cf_extra2 = Nil }))) else parent_result)))))))))))\n\n(* make-emitter *)\nand make_emitter () =\n (let _d = Hashtbl.create 2 in Hashtbl.replace _d \"pool\" (make_pool ()); Hashtbl.replace _d \"bytecode\" (if sx_truthy ((is_primitive ((String \"mutable-list\")))) then (mutable_list ()) else (List [])); Dict _d)\n\n(* emit-byte *)\nand emit_byte em byte =\n (sx_append_b (get (em) ((String \"bytecode\"))) byte)\n\n(* emit-u16 *)\nand emit_u16 em value =\n (let () = ignore ((emit_byte (em) ((prim_call \"mod\" [value; (Number 256.0)])))) in (emit_byte (em) ((prim_call \"mod\" [(floor ((prim_call \"/\" [value; (Number 256.0)]))); (Number 256.0)]))))\n\n(* emit-i16 *)\nand emit_i16 em value =\n (let v = (if sx_truthy ((prim_call \"<\" [value; (Number 0.0)])) then (prim_call \"+\" [value; (Number 65536.0)]) else value) in (emit_u16 (em) (v)))\n\n(* emit-op *)\nand emit_op em opcode =\n (emit_byte (em) (opcode))\n\n(* emit-const *)\nand emit_const em value =\n (let idx = (pool_add ((get (em) ((String \"pool\")))) (value)) in (let () = ignore ((emit_op (em) ((Number 1.0)))) in (emit_u16 (em) (idx))))\n\n(* current-offset *)\nand current_offset em =\n (len ((get (em) ((String \"bytecode\")))))\n\n(* patch-i16 *)\nand patch_i16 em offset value =\n (let () = ignore ((String \"Patch a previously emitted i16 at the given bytecode offset.\")) in (let v = (if sx_truthy ((prim_call \"<\" [value; (Number 0.0)])) then (prim_call \"+\" [value; (Number 65536.0)]) else value) in let bc = (get (em) ((String \"bytecode\"))) in (let () = ignore ((set_nth_b (bc) (offset) ((prim_call \"mod\" [v; (Number 256.0)])))) in (set_nth_b (bc) ((prim_call \"+\" [offset; (Number 1.0)])) ((prim_call \"mod\" [(floor ((prim_call \"/\" [v; (Number 256.0)]))); (Number 256.0)]))))))\n\n(* compile-expr *)\nand compile_expr em expr scope tail_p =\n (let () = ignore ((String \"Compile an expression. tail? indicates tail position for TCO.\")) in (if sx_truthy ((is_nil (expr))) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"number\")])) then (emit_const (em) (expr)) else (if sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"string\")])) then (emit_const (em) (expr)) else (if sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"boolean\")])) then (emit_op (em) ((if sx_truthy (expr) then (Number 3.0) else (Number 4.0)))) else (if sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"keyword\")])) then (emit_const (em) ((keyword_name (expr)))) else (if sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"symbol\")])) then (compile_symbol (em) ((symbol_name (expr))) (scope)) else (if sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"list\")])) then (if sx_truthy ((empty_p (expr))) then (let () = ignore ((emit_op (em) ((Number 64.0)))) in (emit_u16 (em) ((Number 0.0)))) else (compile_list (em) (expr) (scope) (tail_p))) else (if sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"dict\")])) then (compile_dict (em) (expr) (scope)) else (emit_const (em) (expr)))))))))))\n\n(* compile-symbol *)\nand compile_symbol em name scope =\n (let resolved = (scope_resolve (scope) (name)) in (if sx_truthy ((prim_call \"=\" [(get (resolved) ((String \"type\"))); (String \"local\")])) then (let () = ignore ((emit_op (em) ((Number 16.0)))) in (emit_byte (em) ((get (resolved) ((String \"index\")))))) else (if sx_truthy ((prim_call \"=\" [(get (resolved) ((String \"type\"))); (String \"upvalue\")])) then (let () = ignore ((emit_op (em) ((Number 18.0)))) in (emit_byte (em) ((get (resolved) ((String \"index\")))))) else (let idx = (pool_add ((get (em) ((String \"pool\")))) (name)) in (let () = ignore ((emit_op (em) ((Number 20.0)))) in (emit_u16 (em) (idx)))))))\n\n(* compile-dict *)\nand compile_dict em expr scope =\n (let ks = (prim_call \"keys\" [expr]) in let count = (len (ks)) in (let () = ignore ((List.iter (fun k -> ignore ((let () = ignore ((emit_const (em) (k))) in (compile_expr (em) ((get (expr) (k))) (scope) ((Bool false)))))) (sx_to_list ks); Nil)) in (let () = ignore ((emit_op (em) ((Number 65.0)))) in (emit_u16 (em) (count)))))\n\n(* compile-list *)\nand compile_list em expr scope tail_p =\n (let head = (first (expr)) in let args = (rest (expr)) in (if sx_truthy ((Bool (not (sx_truthy ((prim_call \"=\" [(type_of (head)); (String \"symbol\")])))))) then (compile_call (em) (head) (args) (scope) (tail_p)) else (let name = (symbol_name (head)) in (if sx_truthy ((prim_call \"=\" [name; (String \"if\")])) then (compile_if (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"when\")])) then (compile_when (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"and\")])) then (compile_and (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"or\")])) then (compile_or (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"let\")])) then (compile_let (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"let*\")])) then (compile_let (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"begin\")])) then (compile_begin (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"do\")])) then (compile_begin (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"lambda\")])) then (compile_lambda (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"fn\")])) then (compile_lambda (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"define\")])) then (compile_define (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"set!\")])) then (compile_set (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"quote\")])) then (compile_quote (em) (args)) else (if sx_truthy ((prim_call \"=\" [name; (String \"cond\")])) then (compile_cond (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"case\")])) then (compile_case (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"->\")])) then (compile_thread (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"defcomp\")])) then (compile_defcomp (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"defisland\")])) then (compile_defcomp (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"defmacro\")])) then (compile_defmacro (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"defstyle\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"defhandler\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"defpage\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"defquery\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"defaction\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"defrelation\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"deftype\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"defeffect\")])) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [name; (String \"defisland\")])) then (compile_defcomp (em) (args) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"quasiquote\")])) then (compile_quasiquote (em) ((first (args))) (scope)) else (if sx_truthy ((prim_call \"=\" [name; (String \"letrec\")])) then (compile_letrec (em) (args) (scope) (tail_p)) else (if sx_truthy ((prim_call \"=\" [name; (String \"match\")])) then (compile_match (em) (args) (scope) (tail_p)) else (compile_call (em) (head) (args) (scope) (tail_p))))))))))))))))))))))))))))))))))))\n\n(* compile-if *)\nand compile_if em args scope tail_p =\n (let test = (first (args)) in let then_expr = (nth (args) ((Number 1.0))) in let else_expr = (if sx_truthy ((prim_call \">\" [(len (args)); (Number 2.0)])) then (nth (args) ((Number 2.0))) else Nil) in (let () = ignore ((compile_expr (em) (test) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 33.0)))) in (let else_jump = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((compile_expr (em) (then_expr) (scope) (tail_p))) in (let () = ignore ((emit_op (em) ((Number 32.0)))) in (let end_jump = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((patch_i16 (em) (else_jump) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [else_jump; (Number 2.0)])])))) in (let () = ignore ((if sx_truthy ((is_nil (else_expr))) then (emit_op (em) ((Number 2.0))) else (compile_expr (em) (else_expr) (scope) (tail_p)))) in (patch_i16 (em) (end_jump) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [end_jump; (Number 2.0)])]))))))))))))))\n\n(* compile-when *)\nand compile_when em args scope tail_p =\n (let test = (first (args)) in let body = (rest (args)) in (let () = ignore ((compile_expr (em) (test) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 33.0)))) in (let skip_jump = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((compile_begin (em) (body) (scope) (tail_p))) in (let () = ignore ((emit_op (em) ((Number 32.0)))) in (let end_jump = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((patch_i16 (em) (skip_jump) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [skip_jump; (Number 2.0)])])))) in (let () = ignore ((emit_op (em) ((Number 2.0)))) in (patch_i16 (em) (end_jump) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [end_jump; (Number 2.0)])]))))))))))))))\n\n(* compile-and *)\nand compile_and em args scope tail_p =\n (if sx_truthy ((empty_p (args))) then (emit_op (em) ((Number 3.0))) else (if sx_truthy ((prim_call \"=\" [(len (args)); (Number 1.0)])) then (compile_expr (em) ((first (args))) (scope) (tail_p)) else (let () = ignore ((compile_expr (em) ((first (args))) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 6.0)))) in (let () = ignore ((emit_op (em) ((Number 33.0)))) in (let skip = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((emit_op (em) ((Number 5.0)))) in (let () = ignore ((compile_and (em) ((rest (args))) (scope) (tail_p))) in (patch_i16 (em) (skip) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [skip; (Number 2.0)])]))))))))))))\n\n(* compile-or *)\nand compile_or em args scope tail_p =\n (if sx_truthy ((empty_p (args))) then (emit_op (em) ((Number 4.0))) else (if sx_truthy ((prim_call \"=\" [(len (args)); (Number 1.0)])) then (compile_expr (em) ((first (args))) (scope) (tail_p)) else (let () = ignore ((compile_expr (em) ((first (args))) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 6.0)))) in (let () = ignore ((emit_op (em) ((Number 34.0)))) in (let skip = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((emit_op (em) ((Number 5.0)))) in (let () = ignore ((compile_or (em) ((rest (args))) (scope) (tail_p))) in (patch_i16 (em) (skip) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [skip; (Number 2.0)])]))))))))))))\n\n(* compile-begin *)\nand compile_begin em exprs scope tail_p =\n (let () = ignore ((if sx_truthy ((let _and = (Bool (not (sx_truthy ((empty_p (exprs)))))) in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((is_nil ((get (scope) ((String \"parent\"))))))))))) then (List.iter (fun expr -> ignore ((if sx_truthy ((let _and = (prim_call \"=\" [(type_of (expr)); (String \"list\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \">=\" [(len (expr)); (Number 2.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (expr)))); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(symbol_name ((first (expr)))); (String \"define\")]))))) then (let name_expr = (nth (expr) ((Number 1.0))) in let name = (if sx_truthy ((prim_call \"=\" [(type_of (name_expr)); (String \"symbol\")])) then (symbol_name (name_expr)) else name_expr) in (scope_define_local (scope) (name))) else Nil))) (sx_to_list exprs); Nil) else Nil)) in (if sx_truthy ((empty_p (exprs))) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [(len (exprs)); (Number 1.0)])) then (compile_expr (em) ((first (exprs))) (scope) (tail_p)) else (let () = ignore ((compile_expr (em) ((first (exprs))) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 5.0)))) in (compile_begin (em) ((rest (exprs))) (scope) (tail_p)))))))\n\n(* compile-let *)\nand compile_let em args scope tail_p =\n (if sx_truthy ((prim_call \"=\" [(type_of ((first (args)))); (String \"symbol\")])) then (let loop_name = (symbol_name ((first (args)))) in let bindings = (nth (args) ((Number 1.0))) in let body = (prim_call \"slice\" [args; (Number 2.0)]) in let params = ref ((List [])) in let inits = ref ((List [])) in (let () = ignore ((List.iter (fun binding -> ignore ((let () = ignore ((params := sx_append_b !params (if sx_truthy ((prim_call \"=\" [(type_of ((first (binding)))); (String \"symbol\")])) then (first (binding)) else (make_symbol ((first (binding))))); Nil)) in (inits := sx_append_b !inits (nth (binding) ((Number 1.0))); Nil)))) (sx_to_list bindings); Nil)) in (let lambda_expr = (prim_call \"concat\" [(List [(make_symbol ((String \"fn\"))); !params]); body]) in let letrec_bindings = (List [(List [(make_symbol (loop_name)); lambda_expr])]) in let call_expr = (cons ((make_symbol (loop_name))) (!inits)) in (compile_letrec (em) ((List [letrec_bindings; call_expr])) (scope) (tail_p))))) else (let bindings = (first (args)) in let body = (rest (args)) in let let_scope = (make_scope (scope)) in (let () = ignore ((sx_dict_set_b let_scope (String \"next-slot\") (get (scope) ((String \"next-slot\"))))) in (let () = ignore ((List.iter (fun binding -> ignore ((let name = (if sx_truthy ((prim_call \"=\" [(type_of ((first (binding)))); (String \"symbol\")])) then (symbol_name ((first (binding)))) else (first (binding))) in let value = (nth (binding) ((Number 1.0))) in let slot = (scope_define_local (let_scope) (name)) in (let () = ignore ((compile_expr (em) (value) (let_scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 17.0)))) in (emit_byte (em) (slot))))))) (sx_to_list bindings); Nil)) in (compile_begin (em) (body) (let_scope) (tail_p))))))\n\n(* compile-letrec *)\nand compile_letrec em args scope tail_p =\n (let () = ignore ((String \"Compile letrec: all names visible during value compilation.\\n 1. Define all local slots (initialized to nil).\\n 2. Compile each value and assign — names are already in scope\\n so mutually recursive functions can reference each other.\")) in (let bindings = (first (args)) in let body = (rest (args)) in let let_scope = (make_scope (scope)) in (let () = ignore ((sx_dict_set_b let_scope (String \"next-slot\") (get (scope) ((String \"next-slot\"))))) in (let () = ignore ((let slots = (List (List.map (fun binding -> (let name = (if sx_truthy ((prim_call \"=\" [(type_of ((first (binding)))); (String \"symbol\")])) then (symbol_name ((first (binding)))) else (first (binding))) in (let slot = (scope_define_local (let_scope) (name)) in (let () = ignore ((emit_op (em) ((Number 2.0)))) in (let () = ignore ((emit_op (em) ((Number 17.0)))) in (let () = ignore ((emit_byte (em) (slot))) in slot)))))) (sx_to_list bindings))) in (List.iter (fun pair -> ignore ((let binding = (first (pair)) in let slot = (nth (pair) ((Number 1.0))) in (let () = ignore ((compile_expr (em) ((nth (binding) ((Number 1.0)))) (let_scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 17.0)))) in (emit_byte (em) (slot))))))) (sx_to_list (List (List.map (fun i -> (List [(nth (bindings) (i)); (nth (slots) (i))])) (sx_to_list (prim_call \"range\" [(Number 0.0); (len (bindings))]))))); Nil))) in (compile_begin (em) (body) (let_scope) (tail_p))))))\n\n(* compile-lambda *)\nand compile_lambda em args scope =\n (let params = (first (args)) in let body = (rest (args)) in let fn_scope = (make_scope (scope)) in let fn_em = (make_emitter ()) in (let () = ignore ((sx_dict_set_b fn_scope (String \"is-function\") (Bool true))) in (let () = ignore ((List.iter (fun p -> ignore ((let name = (if sx_truthy ((prim_call \"=\" [(type_of (p)); (String \"symbol\")])) then (symbol_name (p)) else (if sx_truthy ((let _and = (list_p (p)) in if not (sx_truthy _and) then _and else (let _and = (Bool (not (sx_truthy ((empty_p (p)))))) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(type_of ((first (p)))); (String \"symbol\")])))) then (symbol_name ((first (p)))) else p)) in (if sx_truthy ((let _and = (Bool (not (sx_truthy ((prim_call \"=\" [name; (String \"&key\")]))))) in if not (sx_truthy _and) then _and else (Bool (not (sx_truthy ((prim_call \"=\" [name; (String \"&rest\")]))))))) then (scope_define_local (fn_scope) (name)) else Nil)))) (sx_to_list params); Nil)) in (let () = ignore ((compile_begin (fn_em) (body) (fn_scope) ((Bool true)))) in (let () = ignore ((emit_op (fn_em) ((Number 50.0)))) in (let upvals = (get (fn_scope) ((String \"upvalues\"))) in let code = (let _d = Hashtbl.create 4 in Hashtbl.replace _d \"upvalue-count\" (len (upvals)); Hashtbl.replace _d \"arity\" (len ((get (fn_scope) ((String \"locals\"))))); Hashtbl.replace _d \"constants\" (get ((get (fn_em) ((String \"pool\")))) ((String \"entries\"))); Hashtbl.replace _d \"bytecode\" (get (fn_em) ((String \"bytecode\"))); Dict _d) in let code_idx = (pool_add ((get (em) ((String \"pool\")))) (code)) in (let () = ignore ((emit_op (em) ((Number 51.0)))) in (let () = ignore ((emit_u16 (em) (code_idx))) in (List.iter (fun uv -> ignore ((let () = ignore ((emit_byte (em) ((if sx_truthy ((get (uv) ((String \"is-local\")))) then (Number 1.0) else (Number 0.0))))) in (emit_byte (em) ((get (uv) ((String \"index\")))))))) (sx_to_list upvals); Nil)))))))))\n\n(* compile-define *)\nand compile_define em args scope =\n (let name_expr = (first (args)) in let name = (if sx_truthy ((prim_call \"=\" [(type_of (name_expr)); (String \"symbol\")])) then (symbol_name (name_expr)) else name_expr) in let value = (let rest_args = (rest (args)) in (if sx_truthy ((let _and = (Bool (not (sx_truthy ((empty_p (rest_args)))))) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(type_of ((first (rest_args)))); (String \"keyword\")]))) then (skip_annotations (rest_args)) else (first (rest_args)))) in (if sx_truthy ((Bool (not (sx_truthy ((is_nil ((get (scope) ((String \"parent\")))))))))) then (let slot = (scope_define_local (scope) (name)) in (let () = ignore ((compile_expr (em) (value) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 17.0)))) in (emit_byte (em) (slot))))) else (let name_idx = (pool_add ((get (em) ((String \"pool\")))) (name)) in (let () = ignore ((compile_expr (em) (value) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 128.0)))) in (emit_u16 (em) (name_idx)))))))\n\n(* compile-set *)\nand compile_set em args scope =\n (let name = (if sx_truthy ((prim_call \"=\" [(type_of ((first (args)))); (String \"symbol\")])) then (symbol_name ((first (args)))) else (first (args))) in let value = (nth (args) ((Number 1.0))) in let resolved = (scope_resolve (scope) (name)) in (let () = ignore ((compile_expr (em) (value) (scope) ((Bool false)))) in (if sx_truthy ((prim_call \"=\" [(get (resolved) ((String \"type\"))); (String \"local\")])) then (let () = ignore ((emit_op (em) ((Number 17.0)))) in (emit_byte (em) ((get (resolved) ((String \"index\")))))) else (if sx_truthy ((prim_call \"=\" [(get (resolved) ((String \"type\"))); (String \"upvalue\")])) then (let () = ignore ((emit_op (em) ((Number 19.0)))) in (emit_byte (em) ((get (resolved) ((String \"index\")))))) else (let idx = (pool_add ((get (em) ((String \"pool\")))) (name)) in (let () = ignore ((emit_op (em) ((Number 21.0)))) in (emit_u16 (em) (idx))))))))\n\n(* compile-quote *)\nand compile_quote em args =\n (if sx_truthy ((empty_p (args))) then (emit_op (em) ((Number 2.0))) else (emit_const (em) ((first (args)))))\n\n(* compile-cond *)\nand compile_cond em args scope tail_p =\n (let () = ignore ((String \"Compile (cond test1 body1 test2 body2 ... :else fallback).\")) in (if sx_truthy ((prim_call \"<\" [(len (args)); (Number 2.0)])) then (emit_op (em) ((Number 2.0))) else (let test = (first (args)) in let body = (nth (args) ((Number 1.0))) in let rest_clauses = (if sx_truthy ((prim_call \">\" [(len (args)); (Number 2.0)])) then (prim_call \"slice\" [args; (Number 2.0)]) else (List [])) in (if sx_truthy ((let _or = (let _and = (prim_call \"=\" [(type_of (test)); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name (test)); (String \"else\")])) in if sx_truthy _or then _or else (prim_call \"=\" [test; (Bool true)]))) then (compile_expr (em) (body) (scope) (tail_p)) else (let () = ignore ((compile_expr (em) (test) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 33.0)))) in (let skip = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((compile_expr (em) (body) (scope) (tail_p))) in (let () = ignore ((emit_op (em) ((Number 32.0)))) in (let end_jump = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((patch_i16 (em) (skip) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [skip; (Number 2.0)])])))) in (let () = ignore ((compile_cond (em) (rest_clauses) (scope) (tail_p))) in (patch_i16 (em) (end_jump) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [end_jump; (Number 2.0)])])))))))))))))))))\n\n(* compile-case *)\nand compile_case em args scope tail_p =\n (let () = ignore ((String \"Compile (case expr val1 body1 val2 body2 ... :else fallback).\")) in (let () = ignore ((compile_expr (em) ((first (args))) (scope) ((Bool false)))) in (let clauses = (rest (args)) in (compile_case_clauses (em) (clauses) (scope) (tail_p)))))\n\n(* compile-case-clauses *)\nand compile_case_clauses em clauses scope tail_p =\n (if sx_truthy ((prim_call \"<\" [(len (clauses)); (Number 2.0)])) then (let () = ignore ((emit_op (em) ((Number 5.0)))) in (emit_op (em) ((Number 2.0)))) else (let test = (first (clauses)) in let body = (nth (clauses) ((Number 1.0))) in let rest_clauses = (if sx_truthy ((prim_call \">\" [(len (clauses)); (Number 2.0)])) then (prim_call \"slice\" [clauses; (Number 2.0)]) else (List [])) in (if sx_truthy ((let _or = (let _and = (prim_call \"=\" [(type_of (test)); (String \"keyword\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(keyword_name (test)); (String \"else\")])) in if sx_truthy _or then _or else (prim_call \"=\" [test; (Bool true)]))) then (let () = ignore ((emit_op (em) ((Number 5.0)))) in (compile_expr (em) (body) (scope) (tail_p))) else (let () = ignore ((emit_op (em) ((Number 6.0)))) in (let () = ignore ((compile_expr (em) (test) (scope) ((Bool false)))) in (let () = ignore ((let name_idx = (pool_add ((get (em) ((String \"pool\")))) ((String \"=\"))) in (let () = ignore ((emit_op (em) ((Number 52.0)))) in (let () = ignore ((emit_u16 (em) (name_idx))) in (emit_byte (em) ((Number 2.0))))))) in (let () = ignore ((emit_op (em) ((Number 33.0)))) in (let skip = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((emit_op (em) ((Number 5.0)))) in (let () = ignore ((compile_expr (em) (body) (scope) (tail_p))) in (let () = ignore ((emit_op (em) ((Number 32.0)))) in (let end_jump = (current_offset (em)) in (let () = ignore ((emit_i16 (em) ((Number 0.0)))) in (let () = ignore ((patch_i16 (em) (skip) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [skip; (Number 2.0)])])))) in (let () = ignore ((compile_case_clauses (em) (rest_clauses) (scope) (tail_p))) in (patch_i16 (em) (end_jump) ((prim_call \"-\" [(current_offset (em)); (prim_call \"+\" [end_jump; (Number 2.0)])])))))))))))))))))))\n\n(* compile-thread *)\nand compile_thread em args scope tail_p =\n (let () = ignore ((String \"Compile (-> val (f1 a) (f2 b)) by desugaring to nested calls.\")) in (if sx_truthy ((empty_p (args))) then (emit_op (em) ((Number 2.0))) else (if sx_truthy ((prim_call \"=\" [(len (args)); (Number 1.0)])) then (compile_expr (em) ((first (args))) (scope) (tail_p)) else (let val_expr = (first (args)) in let forms = (rest (args)) in (compile_thread_step (em) (val_expr) (forms) (scope) (tail_p))))))\n\n(* compile-thread-step *)\nand compile_thread_step em val_expr forms scope tail_p =\n (if sx_truthy ((empty_p (forms))) then (compile_expr (em) (val_expr) (scope) (tail_p)) else (let form = (first (forms)) in let rest_forms = (rest (forms)) in let is_tail = (let _and = tail_p in if not (sx_truthy _and) then _and else (empty_p (rest_forms))) in (let call_expr = (if sx_truthy ((list_p (form))) then (prim_call \"concat\" [(List [(first (form)); val_expr]); (rest (form))]) else (List [form; val_expr])) in (if sx_truthy ((empty_p (rest_forms))) then (compile_expr (em) (call_expr) (scope) (is_tail)) else (let () = ignore ((compile_expr (em) (call_expr) (scope) ((Bool false)))) in (compile_thread_step (em) (call_expr) (rest_forms) (scope) (tail_p)))))))\n\n(* compile-defcomp *)\nand compile_defcomp em args scope =\n (let () = ignore ((String \"Compile defcomp/defisland — delegates to runtime via GLOBAL_GET + CALL.\")) in (let () = ignore ((let name_idx = (pool_add ((get (em) ((String \"pool\")))) ((String \"eval-defcomp\"))) in (let () = ignore ((emit_op (em) ((Number 20.0)))) in (emit_u16 (em) (name_idx))))) in (let () = ignore ((emit_const (em) ((prim_call \"concat\" [(List [(make_symbol ((String \"defcomp\")))]); args])))) in (let () = ignore ((emit_op (em) ((Number 48.0)))) in (emit_byte (em) ((Number 1.0)))))))\n\n(* compile-defmacro *)\nand compile_defmacro em args scope =\n (let () = ignore ((String \"Compile defmacro — delegates to runtime via GLOBAL_GET + CALL.\")) in (let () = ignore ((let name_idx = (pool_add ((get (em) ((String \"pool\")))) ((String \"eval-defmacro\"))) in (let () = ignore ((emit_op (em) ((Number 20.0)))) in (emit_u16 (em) (name_idx))))) in (let () = ignore ((emit_const (em) ((prim_call \"concat\" [(List [(make_symbol ((String \"defmacro\")))]); args])))) in (let () = ignore ((emit_op (em) ((Number 48.0)))) in (emit_byte (em) ((Number 1.0)))))))\n\n(* compile-quasiquote *)\nand compile_quasiquote em expr scope =\n (let () = ignore ((String \"Compile quasiquote inline — walks the template at compile time,\\n emitting code that builds the structure at runtime. Unquoted\\n expressions are compiled normally (resolving locals/upvalues),\\n avoiding the qq-expand-runtime env-lookup limitation.\")) in (compile_qq_expr (em) (expr) (scope)))\n\n(* compile-qq-expr *)\nand compile_qq_expr em expr scope =\n (let () = ignore ((String \"Compile a quasiquote sub-expression.\")) in (if sx_truthy ((Bool (not (sx_truthy ((prim_call \"=\" [(type_of (expr)); (String \"list\")])))))) then (emit_const (em) (expr)) else (if sx_truthy ((empty_p (expr))) then (let () = ignore ((emit_op (em) ((Number 64.0)))) in (emit_u16 (em) ((Number 0.0)))) else (let head = (first (expr)) in (if sx_truthy ((let _and = (prim_call \"=\" [(type_of (head)); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(symbol_name (head)); (String \"unquote\")]))) then (compile_expr (em) ((nth (expr) ((Number 1.0)))) (scope) ((Bool false))) else (compile_qq_list (em) (expr) (scope)))))))\n\n(* compile-qq-list *)\nand compile_qq_list em items scope =\n (let () = ignore ((String \"Compile a quasiquote list. Handles splice-unquote by building\\n segments and concatenating them.\")) in (let has_splice = (Bool (List.exists (fun item -> sx_truthy ((let _and = (prim_call \"=\" [(type_of (item)); (String \"list\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \">=\" [(len (item)); (Number 2.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (item)))); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(symbol_name ((first (item)))); (String \"splice-unquote\")])))))) (sx_to_list items))) in (if sx_truthy ((Bool (not (sx_truthy (has_splice))))) then (let () = ignore ((List.iter (fun item -> ignore ((compile_qq_expr (em) (item) (scope)))) (sx_to_list items); Nil)) in (let () = ignore ((emit_op (em) ((Number 64.0)))) in (emit_u16 (em) ((len (items)))))) else (let segment_count = ref ((Number 0.0)) in let pending = ref ((Number 0.0)) in (let () = ignore ((List.iter (fun item -> ignore ((if sx_truthy ((let _and = (prim_call \"=\" [(type_of (item)); (String \"list\")]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \">=\" [(len (item)); (Number 2.0)]) in if not (sx_truthy _and) then _and else (let _and = (prim_call \"=\" [(type_of ((first (item)))); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (prim_call \"=\" [(symbol_name ((first (item)))); (String \"splice-unquote\")]))))) then (let () = ignore ((if sx_truthy ((prim_call \">\" [!pending; (Number 0.0)])) then (let () = ignore ((emit_op (em) ((Number 64.0)))) in (let () = ignore ((emit_u16 (em) (!pending))) in (let () = ignore ((segment_count := (prim_call \"+\" [!segment_count; (Number 1.0)]); Nil)) in (pending := (Number 0.0); Nil)))) else Nil)) in (let () = ignore ((compile_expr (em) ((nth (item) ((Number 1.0)))) (scope) ((Bool false)))) in (segment_count := (prim_call \"+\" [!segment_count; (Number 1.0)]); Nil))) else (let () = ignore ((compile_qq_expr (em) (item) (scope))) in (pending := (prim_call \"+\" [!pending; (Number 1.0)]); Nil))))) (sx_to_list items); Nil)) in (let () = ignore ((if sx_truthy ((prim_call \">\" [!pending; (Number 0.0)])) then (let () = ignore ((emit_op (em) ((Number 64.0)))) in (let () = ignore ((emit_u16 (em) (!pending))) in (segment_count := (prim_call \"+\" [!segment_count; (Number 1.0)]); Nil))) else Nil)) in (if sx_truthy ((prim_call \">\" [!segment_count; (Number 1.0)])) then (let concat_idx = (pool_add ((get (em) ((String \"pool\")))) ((String \"concat\"))) in (let () = ignore ((emit_op (em) ((Number 52.0)))) in (let () = ignore ((emit_u16 (em) (concat_idx))) in (emit_byte (em) (!segment_count))))) else Nil)))))))\n\n(* compile-call *)\nand compile_call em head args scope tail_p =\n (let is_prim = (let _and = (prim_call \"=\" [(type_of (head)); (String \"symbol\")]) in if not (sx_truthy _and) then _and else (let name = (symbol_name (head)) in (let _and = (Bool (not (sx_truthy ((prim_call \"=\" [(get ((scope_resolve (scope) (name))) ((String \"type\"))); (String \"local\")]))))) in if not (sx_truthy _and) then _and else (let _and = (Bool (not (sx_truthy ((prim_call \"=\" [(get ((scope_resolve (scope) (name))) ((String \"type\"))); (String \"upvalue\")]))))) in if not (sx_truthy _and) then _and else (is_primitive (name)))))) in (if sx_truthy (is_prim) then (let name = (symbol_name (head)) in let argc = (len (args)) in let name_idx = (pool_add ((get (em) ((String \"pool\")))) (name)) in (let () = ignore ((List.iter (fun a -> ignore ((compile_expr (em) (a) (scope) ((Bool false))))) (sx_to_list args); Nil)) in (let () = ignore ((emit_op (em) ((Number 52.0)))) in (let () = ignore ((emit_u16 (em) (name_idx))) in (emit_byte (em) (argc)))))) else (let () = ignore ((compile_expr (em) (head) (scope) ((Bool false)))) in (let () = ignore ((List.iter (fun a -> ignore ((compile_expr (em) (a) (scope) ((Bool false))))) (sx_to_list args); Nil)) in (if sx_truthy (tail_p) then (let () = ignore ((emit_op (em) ((Number 49.0)))) in (emit_byte (em) ((len (args))))) else (let () = ignore ((emit_op (em) ((Number 48.0)))) in (emit_byte (em) ((len (args))))))))))\n\n(* compile *)\nand compile expr =\n (let () = ignore ((String \"Compile a single SX expression to a bytecode module.\")) in (let em = (make_emitter ()) in let scope = (make_scope (Nil)) in (let () = ignore ((compile_expr (em) (expr) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 50.0)))) in (let _d = Hashtbl.create 3 in let () = ignore (Hashtbl.replace _d \"arity\" (get (scope) (String \"next-slot\"))) in Hashtbl.replace _d \"constants\" (get ((get (em) ((String \"pool\")))) ((String \"entries\"))); Hashtbl.replace _d \"bytecode\" (get (em) ((String \"bytecode\"))); Dict _d)))))\n\n(* compile-module *)\nand compile_module exprs =\n (let () = ignore ((String \"Compile a list of top-level expressions to a bytecode module.\")) in (let em = (make_emitter ()) in let scope = (make_scope (Nil)) in (let () = ignore ((List.iter (fun expr -> ignore ((let () = ignore ((compile_expr (em) (expr) (scope) ((Bool false)))) in (emit_op (em) ((Number 5.0)))))) (sx_to_list (init (exprs))); Nil)) in (let () = ignore ((compile_expr (em) ((last (exprs))) (scope) ((Bool false)))) in (let () = ignore ((emit_op (em) ((Number 50.0)))) in (let _d = Hashtbl.create 3 in let () = ignore (Hashtbl.replace _d \"arity\" (get (scope) (String \"next-slot\"))) in Hashtbl.replace _d \"constants\" (get ((get (em) ((String \"pool\")))) ((String \"entries\"))); Hashtbl.replace _d \"bytecode\" (get (em) ((String \"bytecode\"))); Dict _d))))))\n\n","(* generated code 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