Files
rose-ash/lib/hyperscript/tokenizer.sx
giles 023bc2d80c sx: step 3 — add :end and :line to hs tokenizer tokens
Extend hs-make-token to (type value pos &rest extras) producing dicts
{:pos :end :line :value :type}. End defaults to pos+len(value); line
defaults to 1. Both tokenize loops now track current-line via newline
counting in advance!. hs-emit! and t-emit! pass the right end and
start-line to the constructor; redundant dict-set! after construction
removed.

Mirror copied to shared/static/wasm/sx/hs-tokenizer.sx (byte-identical).

Verify: (hs-make-token "NUMBER" "1" 0) returns
  {:pos 0 :end 1 :line 1 :value "1" :type "NUMBER"}.

OCaml suite: 4529 pass, 1339 pre-existing failures (baseline). All
4/4 hs-upstream-core/sourceInfo tests now pass (was 2/4 — closes E38).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-06 22:14:10 +00:00

858 lines
27 KiB
Plaintext

;; _hyperscript tokenizer — produces token stream from hyperscript source
;;
;; Tokens: {:type T :value V :pos P}
;; Types: "keyword" "ident" "number" "string" "class" "id" "attr" "style"
;; "selector" "op" "dot" "paren-open" "paren-close" "bracket-open"
;; "bracket-close" "brace-open" "brace-close" "comma" "colon"
;; "template" "local" "eof"
;; ── Token constructor ─────────────────────────────────────────────
(define hs-make-token
(fn (type value pos &rest extras)
(let
((end-arg (if (>= (len extras) 1) (nth extras 0) nil))
(line-arg (if (>= (len extras) 2) (nth extras 1) nil)))
(let
((end (if (nil? end-arg)
(+ pos (if (nil? value) 0 (len (str value))))
end-arg))
(line (if (nil? line-arg) 1 line-arg)))
{:pos pos :end end :line line :value value :type type}))))
;; ── Character predicates ──────────────────────────────────────────
(define hs-digit? (fn (c) (and (>= c "0") (<= c "9"))))
(define
hs-letter?
(fn (c) (or (and (>= c "a") (<= c "z")) (and (>= c "A") (<= c "Z")))))
(define hs-ident-start? (fn (c) (or (hs-letter? c) (= c "_") (= c "$"))))
(define
hs-ident-char?
(fn
(c)
(or (hs-letter? c) (hs-digit? c) (= c "_") (= c "$") (= c "-"))))
(define hs-ws? (fn (c) (or (= c " ") (= c "\t") (= c "\n") (= c "\r"))))
(define
hs-hex-digit?
(fn
(c)
(or
(and (>= c "0") (<= c "9"))
(and (>= c "a") (<= c "f"))
(and (>= c "A") (<= c "F")))))
(define
hs-hex-val
(fn
(c)
(let
((code (char-code c)))
(cond
((and (>= code 48) (<= code 57)) (- code 48))
((and (>= code 65) (<= code 70)) (- code 55))
((and (>= code 97) (<= code 102)) (- code 87))
(true 0)))))
;; ── Keyword set ───────────────────────────────────────────────────
(define
hs-keywords
(list
"on"
"end"
"set"
"to"
"put"
"into"
"before"
"after"
"add"
"remove"
"toggle"
"if"
"else"
"otherwise"
"then"
"from"
"in"
"of"
"for"
"until"
"wait"
"send"
"trigger"
"call"
"get"
"take"
"log"
"hide"
"show"
"repeat"
"while"
"times"
"forever"
"break"
"continue"
"return"
"throw"
"catch"
"finally"
"def"
"tell"
"make"
"fetch"
"as"
"with"
"every"
"or"
"and"
"not"
"is"
"no"
"the"
"my"
"me"
"it"
"its"
"result"
"true"
"false"
"null"
"when"
"between"
"at"
"by"
"queue"
"elsewhere"
"event"
"target"
"detail"
"sender"
"index"
"indexed"
"increment"
"decrement"
"append"
"settle"
"transition"
"view"
"over"
"closest"
"next"
"previous"
"first"
"last"
"random"
"pick"
"empty"
"clear"
"swap"
"open"
"close"
"exists"
"matches"
"contains"
"do"
"unless"
"you"
"your"
"new"
"init"
"start"
"go"
"js"
"less"
"than"
"greater"
"class"
"anything"
"install"
"measure"
"behavior"
"called"
"render"
"eval"
"I"
"am"
"does"
"some"
"mod"
"equal"
"equals"
"really"
"include"
"includes"
"contain"
"undefined"
"exist"
"match"
"beep"
"where"
"sorted"
"mapped"
"split"
"joined"
"descending"
"ascending"
"scroll"
"select"
"reset"
"default"
"halt"
"precedes"
"precede"
"follow"
"follows"
"ignoring"
"case"
"changes"
"focus"
"blur"
"dom"
"morph"
"using"
"giving"
"ask"
"answer"
"bind"))
(define hs-keyword? (fn (word) (some (fn (k) (= k word)) hs-keywords)))
;; ── Main tokenizer ────────────────────────────────────────────────
(define
hs-tokenize
(fn
(src)
(let
((tokens (list)) (pos 0) (src-len (len src)) (current-line 1))
(define
hs-peek
(fn
(offset)
(if (< (+ pos offset) src-len) (nth src (+ pos offset)) nil)))
(define hs-cur (fn () (hs-peek 0)))
(define
hs-advance!
(fn (n)
(let ((new-pos (+ pos n)))
(define
count-nl!
(fn (i)
(when (< i new-pos)
(when (= (nth src i) "\n")
(set! current-line (+ current-line 1)))
(count-nl! (+ i 1)))))
(count-nl! pos)
(set! pos new-pos))))
(define
skip-ws!
(fn
()
(when
(and (< pos src-len) (hs-ws? (hs-cur)))
(hs-advance! 1)
(skip-ws!))))
(define
skip-comment!
(fn
()
(when
(and (< pos src-len) (not (= (hs-cur) "\n")))
(hs-advance! 1)
(skip-comment!))))
(define
read-ident
(fn
(start)
(when
(and (< pos src-len) (hs-ident-char? (hs-cur)))
(hs-advance! 1)
(read-ident start))
(slice src start pos)))
(define
read-number
(fn
(start)
(define
read-int
(fn
()
(when
(and (< pos src-len) (hs-digit? (hs-cur)))
(hs-advance! 1)
(read-int))))
(read-int)
(when
(and
(< pos src-len)
(= (hs-cur) ".")
(< (+ pos 1) src-len)
(hs-digit? (hs-peek 1)))
(hs-advance! 1)
(read-int))
(do
(when
(and
(< pos src-len)
(or (= (hs-cur) "e") (= (hs-cur) "E"))
(or
(and (< (+ pos 1) src-len) (hs-digit? (hs-peek 1)))
(and
(< (+ pos 2) src-len)
(or (= (hs-peek 1) "+") (= (hs-peek 1) "-"))
(hs-digit? (hs-peek 2)))))
(hs-advance! 1)
(when
(and
(< pos src-len)
(or (= (hs-cur) "+") (= (hs-cur) "-")))
(hs-advance! 1))
(read-int))
(let
((num-end pos))
(when
(and
(< pos src-len)
(or (= (hs-cur) "m") (= (hs-cur) "s")))
(if
(and
(= (hs-cur) "m")
(< (+ pos 1) src-len)
(= (hs-peek 1) "s"))
(hs-advance! 2)
(when (= (hs-cur) "s") (hs-advance! 1))))
(slice src start pos)))))
(define
read-string
(fn
(quote-char)
(let
((chars (list)))
(hs-advance! 1)
(define
loop
(fn
()
(cond
(>= pos src-len)
(error "Unterminated string")
(= (hs-cur) "\\")
(do
(hs-advance! 1)
(when
(< pos src-len)
(let
((ch (hs-cur)))
(cond
(= ch "n")
(do (append! chars "\n") (hs-advance! 1))
(= ch "t")
(do (append! chars "\t") (hs-advance! 1))
(= ch "r")
(do (append! chars "\r") (hs-advance! 1))
(= ch "b")
(do
(append! chars (char-from-code 8))
(hs-advance! 1))
(= ch "f")
(do
(append! chars (char-from-code 12))
(hs-advance! 1))
(= ch "v")
(do
(append! chars (char-from-code 11))
(hs-advance! 1))
(= ch "\\")
(do (append! chars "\\") (hs-advance! 1))
(= ch quote-char)
(do (append! chars quote-char) (hs-advance! 1))
(= ch "x")
(do
(hs-advance! 1)
(if
(and
(< (+ pos 1) src-len)
(hs-hex-digit? (hs-cur))
(hs-hex-digit? (hs-peek 1)))
(let
((d1 (hs-hex-val (hs-cur)))
(d2 (hs-hex-val (hs-peek 1))))
(append!
chars
(char-from-code (+ (* d1 16) d2)))
(hs-advance! 2))
(error "Invalid hexadecimal escape: \\x")))
:else (do
(append! chars "\\")
(append! chars ch)
(hs-advance! 1)))))
(loop))
(= (hs-cur) quote-char)
(hs-advance! 1)
:else (do (append! chars (hs-cur)) (hs-advance! 1) (loop)))))
(loop)
(join "" chars))))
(define
read-template
(fn
()
(let
((chars (list)))
(hs-advance! 1)
(define
loop
(fn
()
(cond
(>= pos src-len)
nil
(= (hs-cur) "`")
(hs-advance! 1)
(and
(= (hs-cur) "$")
(< (+ pos 1) src-len)
(= (hs-peek 1) "{"))
(do
(append! chars "${")
(hs-advance! 2)
(let
((depth 1))
(define
inner
(fn
()
(when
(and (< pos src-len) (> depth 0))
(cond
(= (hs-cur) "{")
(do
(set! depth (+ depth 1))
(append! chars (hs-cur))
(hs-advance! 1)
(inner))
(= (hs-cur) "}")
(do
(set! depth (- depth 1))
(when (> depth 0) (append! chars (hs-cur)))
(hs-advance! 1)
(when (> depth 0) (inner)))
:else (do
(append! chars (hs-cur))
(hs-advance! 1)
(inner))))))
(inner))
(append! chars "}")
(loop))
:else (do (append! chars (hs-cur)) (hs-advance! 1) (loop)))))
(loop)
(join "" chars))))
(define
read-selector
(fn
()
(let
((chars (list)))
(hs-advance! 1)
(define
loop
(fn
()
(cond
(>= pos src-len)
nil
(and
(= (hs-cur) "/")
(< (+ pos 1) src-len)
(= (hs-peek 1) ">"))
(hs-advance! 2)
:else (do (append! chars (hs-cur)) (hs-advance! 1) (loop)))))
(loop)
(join "" chars))))
(define
read-class-name
(fn
(start)
(define
build-name
(fn
(acc depth)
(cond
((and (< pos src-len) (= (hs-cur) "\\") (< (+ pos 1) src-len))
(do
(hs-advance! 1)
(let
((c (hs-cur)))
(hs-advance! 1)
(build-name (str acc c) depth))))
((and (< pos src-len) (= (hs-cur) "["))
(do
(let
((c (hs-cur)))
(hs-advance! 1)
(build-name (str acc c) (+ depth 1)))))
((and (< pos src-len) (= (hs-cur) "]"))
(do
(let
((c (hs-cur)))
(hs-advance! 1)
(build-name
(str acc c)
(if (> depth 0) (- depth 1) 0)))))
((and (< pos src-len) (> depth 0) (or (= (hs-cur) "(") (= (hs-cur) ")")))
(do
(let
((c (hs-cur)))
(hs-advance! 1)
(build-name (str acc c) depth))))
((and (< pos src-len) (or (hs-ident-char? (hs-cur)) (= (hs-cur) ":") (= (hs-cur) "&")))
(do
(let
((c (hs-cur)))
(hs-advance! 1)
(build-name (str acc c) depth))))
(true acc))))
(build-name "" 0)))
(define
hs-emit!
(fn
(type value start)
(let
((end-pos
(max pos (+ start (if (nil? value) 0 (len (str value))))))
(newlines-after-start
(- (len (split (slice src start (max start pos)) "\n")) 1))
(start-line (- current-line newlines-after-start)))
(append!
tokens
(hs-make-token type value start end-pos start-line)))))
(define
scan!
(fn
()
(let
((ws-start pos))
(skip-ws!)
(when
(and (> (len tokens) 0) (> pos ws-start))
(hs-emit! "whitespace" (slice src ws-start pos) ws-start)))
(when
(< pos src-len)
(let
((ch (hs-cur)) (start pos))
(cond
(and (= ch "-") (< (+ pos 1) src-len) (= (hs-peek 1) "-"))
(do (hs-advance! 2) (skip-comment!) (scan!))
(and (= ch "/") (< (+ pos 1) src-len) (= (hs-peek 1) "/"))
(do (hs-advance! 2) (skip-comment!) (scan!))
(and
(= ch "<")
(< (+ pos 1) src-len)
(not (= (hs-peek 1) "="))
(or
(hs-letter? (hs-peek 1))
(= (hs-peek 1) ".")
(= (hs-peek 1) "#")
(= (hs-peek 1) "[")
(= (hs-peek 1) "*")
(= (hs-peek 1) ":")
(= (hs-peek 1) "$")))
(do (hs-emit! "selector" (read-selector) start) (scan!))
(and (= ch ".") (< (+ pos 1) src-len) (= (hs-peek 1) "."))
(do (hs-emit! "op" ".." start) (hs-advance! 2) (scan!))
(and
(= ch ".")
(< (+ pos 1) src-len)
(or
(hs-letter? (hs-peek 1))
(= (hs-peek 1) "-")
(= (hs-peek 1) "_"))
(> (len tokens) 0)
(let
((lt (dict-get (nth tokens (- (len tokens) 1)) :type)))
(or
(= lt "paren-close")
(= lt "brace-close")
(= lt "bracket-close"))))
(do (hs-emit! "dot" "." start) (hs-advance! 1) (scan!))
(and
(= ch ".")
(< (+ pos 1) src-len)
(or
(hs-letter? (hs-peek 1))
(= (hs-peek 1) "-")
(= (hs-peek 1) "_")))
(do
(hs-advance! 1)
(hs-emit! "class" (read-class-name pos) start)
(scan!))
(and
(= ch "#")
(< (+ pos 1) src-len)
(hs-ident-start? (hs-peek 1))
(> (len tokens) 0)
(let
((lt (dict-get (nth tokens (- (len tokens) 1)) :type)))
(or
(= lt "paren-close")
(= lt "brace-close")
(= lt "bracket-close"))))
(do (hs-emit! "op" "#" start) (hs-advance! 1) (scan!))
(and
(= ch "#")
(< (+ pos 1) src-len)
(hs-ident-start? (hs-peek 1)))
(do
(hs-advance! 1)
(hs-emit! "id" (read-ident pos) start)
(scan!))
(and
(= ch "@")
(< (+ pos 1) src-len)
(hs-ident-char? (hs-peek 1)))
(do
(hs-advance! 1)
(hs-emit! "attr" (read-ident pos) start)
(scan!))
(and
(= ch "^")
(< (+ pos 1) src-len)
(hs-ident-char? (hs-peek 1)))
(do
(hs-advance! 1)
(hs-emit! "hat" (read-ident pos) start)
(scan!))
(and
(= ch "~")
(< (+ pos 1) src-len)
(hs-letter? (hs-peek 1)))
(do
(hs-advance! 1)
(hs-emit! "component" (str "~" (read-ident pos)) start)
(scan!))
(and
(= ch "*")
(< (+ pos 1) src-len)
(hs-letter? (hs-peek 1)))
(do
(hs-advance! 1)
(hs-emit! "style" (read-ident pos) start)
(scan!))
(and
(= ch ":")
(< (+ pos 1) src-len)
(hs-ident-start? (hs-peek 1)))
(do
(hs-advance! 1)
(hs-emit! "local" (read-ident pos) start)
(scan!))
(or
(= ch "\"")
(and
(= ch "'")
(not
(and
(< (+ pos 1) src-len)
(= (hs-peek 1) "s")
(or
(>= (+ pos 2) src-len)
(not (hs-ident-char? (hs-peek 2))))))))
(do (hs-emit! "string" (read-string ch) start) (scan!))
(= ch "`")
(do (hs-emit! "template" (read-template) start) (scan!))
(hs-digit? ch)
(do (hs-emit! "number" (read-number start) start) (scan!))
(hs-ident-start? ch)
(do
(let
((word (read-ident start)))
(let
((full-word (if (and (< pos src-len) (= (hs-cur) "'") (< (+ pos 1) src-len) (hs-letter? (hs-peek 1)) (not (and (= (hs-peek 1) "s") (or (>= (+ pos 2) src-len) (not (hs-ident-char? (hs-peek 2))))))) (do (hs-advance! 1) (str word "'" (read-ident pos))) word)))
(hs-emit!
(if (hs-keyword? full-word) "keyword" "ident")
full-word
start)))
(scan!))
(and
(or (= ch "=") (= ch "!") (= ch "<") (= ch ">"))
(< (+ pos 1) src-len)
(= (hs-peek 1) "="))
(do
(if
(and
(or (= ch "=") (= ch "!"))
(< (+ pos 2) src-len)
(= (hs-peek 2) "="))
(do (hs-emit! "op" (str ch "==") start) (hs-advance! 3))
(do (hs-emit! "op" (str ch "=") start) (hs-advance! 2)))
(scan!))
(and
(= ch "'")
(< (+ pos 1) src-len)
(= (hs-peek 1) "s")
(or
(>= (+ pos 2) src-len)
(not (hs-ident-char? (hs-peek 2)))))
(do (hs-emit! "op" "'s" start) (hs-advance! 2) (scan!))
(= ch "(")
(do
(hs-emit! "paren-open" "(" start)
(hs-advance! 1)
(scan!))
(= ch ")")
(do
(hs-emit! "paren-close" ")" start)
(hs-advance! 1)
(scan!))
(= ch "[")
(do
(hs-emit! "bracket-open" "[" start)
(hs-advance! 1)
(scan!))
(= ch "]")
(do
(hs-emit! "bracket-close" "]" start)
(hs-advance! 1)
(scan!))
(= ch "{")
(do
(hs-emit! "brace-open" "{" start)
(hs-advance! 1)
(scan!))
(= ch "}")
(do
(hs-emit! "brace-close" "}" start)
(hs-advance! 1)
(scan!))
(= ch ",")
(do (hs-emit! "comma" "," start) (hs-advance! 1) (scan!))
(= ch "+")
(do (hs-emit! "op" "+" start) (hs-advance! 1) (scan!))
(= ch "-")
(do (hs-emit! "op" "-" start) (hs-advance! 1) (scan!))
(= ch "/")
(do (hs-emit! "op" "/" start) (hs-advance! 1) (scan!))
(= ch "=")
(do (hs-emit! "op" "=" start) (hs-advance! 1) (scan!))
(= ch "<")
(do (hs-emit! "op" "<" start) (hs-advance! 1) (scan!))
(= ch ">")
(do (hs-emit! "op" ">" start) (hs-advance! 1) (scan!))
(= ch "!")
(do (hs-emit! "op" "!" start) (hs-advance! 1) (scan!))
(= ch "*")
(do (hs-emit! "op" "*" start) (hs-advance! 1) (scan!))
(= ch "%")
(do (hs-emit! "op" "%" start) (hs-advance! 1) (scan!))
(= ch ".")
(do (hs-emit! "dot" "." start) (hs-advance! 1) (scan!))
(= ch "\\")
(do (hs-emit! "op" "\\" start) (hs-advance! 1) (scan!))
(= ch ":")
(do (hs-emit! "colon" ":" start) (hs-advance! 1) (scan!))
(= ch "|")
(do (hs-emit! "op" "|" start) (hs-advance! 1) (scan!))
(= ch "&")
(do (hs-emit! "op" "&" start) (hs-advance! 1) (scan!))
(= ch "#")
(do (hs-emit! "op" "#" start) (hs-advance! 1) (scan!))
(= ch "?")
(do (hs-emit! "op" "?" start) (hs-advance! 1) (scan!))
(= ch ";")
(do (hs-emit! "op" ";" start) (hs-advance! 1) (scan!))
:else (do (hs-advance! 1) (scan!)))))))
(scan!)
(hs-emit! "eof" nil pos)
tokens)))
;; ── Template-mode tokenizer (E37 API) ────────────────────────────────
;; Used by hs-tokens-of when :template flag is set.
;; Emits outer " chars as single STRING tokens; ${ ... } as $ { <inner-tokens> };
;; inner content is tokenized with the regular hs-tokenize.
(define
hs-tokenize-template
(fn
(src)
(let
((tokens (list)) (pos 0) (src-len (len src)) (current-line 1))
(define t-cur (fn () (if (< pos src-len) (nth src pos) nil)))
(define t-peek (fn (n) (if (< (+ pos n) src-len) (nth src (+ pos n)) nil)))
(define
t-advance!
(fn (n)
(let ((new-pos (+ pos n)))
(define
t-count-nl!
(fn (i)
(when (< i new-pos)
(when (= (nth src i) "\n")
(set! current-line (+ current-line 1)))
(t-count-nl! (+ i 1)))))
(t-count-nl! pos)
(set! pos new-pos))))
(define
t-emit!
(fn (type value)
(let
((end-pos (+ pos (if (nil? value) 0 (len (str value))))))
(append!
tokens
(hs-make-token type value pos end-pos current-line)))))
(define
scan-to-close!
(fn
(depth)
(when
(and (< pos src-len) (> depth 0))
(cond
(= (t-cur) "{")
(do (t-advance! 1) (scan-to-close! (+ depth 1)))
(= (t-cur) "}")
(when (> (- depth 1) 0) (t-advance! 1) (scan-to-close! (- depth 1)))
:else (do (t-advance! 1) (scan-to-close! depth))))))
(define
scan-template!
(fn
()
(when
(< pos src-len)
(let
((ch (t-cur)))
(cond
(= ch "\"")
(do (t-emit! "string" "\"") (t-advance! 1) (scan-template!))
(and (= ch "$") (= (t-peek 1) "{"))
(do
(t-emit! "op" "$")
(t-advance! 1)
(t-emit! "brace-open" "{")
(t-advance! 1)
(let
((inner-start pos))
(scan-to-close! 1)
(let
((inner-src (slice src inner-start pos))
(inner-toks (hs-tokenize inner-src)))
(for-each
(fn (tok)
(when (not (= (get tok "type") "eof"))
(append! tokens tok)))
inner-toks))
(t-emit! "brace-close" "}")
(when (< pos src-len) (t-advance! 1)))
(scan-template!))
(= ch "$")
(do (t-emit! "op" "$") (t-advance! 1) (scan-template!))
(hs-ws? ch)
(do (t-advance! 1) (scan-template!))
:else (do (t-advance! 1) (scan-template!)))))))
(scan-template!)
(t-emit! "eof" nil)
tokens)))