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Spec eval-cond and process-bindings in render.sx (remove platform implementations)

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eval-cond and process-bindings were hand-written platform JS in
bootstrap_js.py rather than specced in .sx files. This violated the
SX host architecture principle. Now specced in render.sx as shared
render adapter helpers, bootstrapped to both JS and Python.

eval-cond handles both scheme-style ((test body) ...) and clojure-style
(test body test body ...) cond clauses. Returns unevaluated body
expression for the adapter to render in its own mode.

process-bindings evaluates let-binding pairs and returns extended env.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
giles
2026-03-06 16:58:53 +00:00
parent a2d0a8a0fa
commit 20ac0fe948
5 changed files with 117 additions and 66 deletions
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12
shared/sx/ref/sx_ref.py
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@@ -1140,6 +1140,18 @@ parse_element_args = lambda args, env: (lambda attrs: (lambda children: _sx_begi
# render-attrs
render_attrs = lambda attrs: join('', map(lambda key: (lambda val: (sx_str(' ', key) if sx_truthy((contains_p(BOOLEAN_ATTRS, key) if not sx_truthy(contains_p(BOOLEAN_ATTRS, key)) else val)) else ('' if sx_truthy((contains_p(BOOLEAN_ATTRS, key) if not sx_truthy(contains_p(BOOLEAN_ATTRS, key)) else (not sx_truthy(val)))) else ('' if sx_truthy(is_nil(val)) else (sx_str(' class="', style_value_class(val), '"') if sx_truthy(((key == 'style') if not sx_truthy((key == 'style')) else is_style_value(val))) else sx_str(' ', key, '="', escape_attr(sx_str(val)), '"'))))))(dict_get(attrs, key)), keys(attrs)))
# eval-cond
eval_cond = lambda clauses, env: (eval_cond_scheme(clauses, env) if sx_truthy(((not sx_truthy(empty_p(clauses))) if not sx_truthy((not sx_truthy(empty_p(clauses)))) else ((type_of(first(clauses)) == 'list') if not sx_truthy((type_of(first(clauses)) == 'list')) else (len(first(clauses)) == 2)))) else eval_cond_clojure(clauses, env))
# eval-cond-scheme
eval_cond_scheme = lambda clauses, env: (NIL if sx_truthy(empty_p(clauses)) else (lambda clause: (lambda test: (lambda body: (body if sx_truthy((((type_of(test) == 'symbol') if not sx_truthy((type_of(test) == 'symbol')) else ((symbol_name(test) == 'else') if sx_truthy((symbol_name(test) == 'else')) else (symbol_name(test) == ':else'))) if sx_truthy(((type_of(test) == 'symbol') if not sx_truthy((type_of(test) == 'symbol')) else ((symbol_name(test) == 'else') if sx_truthy((symbol_name(test) == 'else')) else (symbol_name(test) == ':else')))) else ((type_of(test) == 'keyword') if not sx_truthy((type_of(test) == 'keyword')) else (keyword_name(test) == 'else')))) else (body if sx_truthy(trampoline(eval_expr(test, env))) else eval_cond_scheme(rest(clauses), env))))(nth(clause, 1)))(first(clause)))(first(clauses)))
# eval-cond-clojure
eval_cond_clojure = lambda clauses, env: (NIL if sx_truthy((len(clauses) < 2)) else (lambda test: (lambda body: (body if sx_truthy((((type_of(test) == 'keyword') if not sx_truthy((type_of(test) == 'keyword')) else (keyword_name(test) == 'else')) if sx_truthy(((type_of(test) == 'keyword') if not sx_truthy((type_of(test) == 'keyword')) else (keyword_name(test) == 'else'))) else ((type_of(test) == 'symbol') if not sx_truthy((type_of(test) == 'symbol')) else ((symbol_name(test) == 'else') if sx_truthy((symbol_name(test) == 'else')) else (symbol_name(test) == ':else'))))) else (body if sx_truthy(trampoline(eval_expr(test, env))) else eval_cond_clojure(slice(clauses, 2), env))))(nth(clauses, 1)))(first(clauses)))
# process-bindings
process_bindings = lambda bindings, env: (lambda local: _sx_begin(for_each(lambda pair: ((lambda name: _sx_dict_set(local, name, trampoline(eval_expr(nth(pair, 1), local))))((symbol_name(first(pair)) if sx_truthy((type_of(first(pair)) == 'symbol')) else sx_str(first(pair)))) if sx_truthy(((type_of(pair) == 'list') if not sx_truthy((type_of(pair) == 'list')) else (len(pair) >= 2))) else NIL), bindings), local))(merge(env))
# === Transpiled from adapter-html ===