зеркало из https://github.com/mozilla/gecko-dev.git
488 строки
27 KiB
Common Lisp
488 строки
27 KiB
Common Lisp
;;; The contents of this file are subject to the Netscape Public License
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;;; Version 1.0 (the "NPL"); you may not use this file except in
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;;; compliance with the NPL. You may obtain a copy of the NPL at
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;;; http://www.mozilla.org/NPL/
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;;;
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;;; Software distributed under the NPL is distributed on an "AS IS" basis,
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;;; WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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;;; for the specific language governing rights and limitations under the
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;;; NPL.
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;;;
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;;; The Initial Developer of this code under the NPL is Netscape
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;;; Communications Corporation. Portions created by Netscape are
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;;; Copyright (C) 1998 Netscape Communications Corporation. All Rights
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;;; Reserved.
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;;;
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;;; ECMAScript sample lexer
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;;;
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;;; Waldemar Horwat (waldemar@netscape.com)
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;;;
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(defun digit-char-16 (char)
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(assert-non-null (digit-char-p char 16)))
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(progn
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(defparameter *lw*
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(generate-world
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"L"
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'((lexer code-lexer
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:lalr-1
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:next-token
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((:white-space-character (#?0009 #?000B #?000C #\space) ())
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(:line-terminator (#?000A #?000D) ())
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(:non-terminator (- every :line-terminator) ())
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(:non-terminator-or-slash (- :non-terminator (#\/)) ())
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(:non-terminator-or-asterisk-or-slash (- :non-terminator (#\* #\/)) ())
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(:identifier-letter (++ (#\A #\B #\C #\D #\E #\F #\G #\H #\I #\J #\K #\L #\M #\N #\O #\P #\Q #\R #\S #\T #\U #\V #\W #\X #\Y #\Z)
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(#\a #\b #\c #\d #\e #\f #\g #\h #\i #\j #\k #\l #\m #\n #\o #\p #\q #\r #\s #\t #\u #\v #\w #\x #\y #\z)
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(#\$ #\_))
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((character-value character-value)))
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(:decimal-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9)
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((character-value character-value)
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(decimal-value digit-value)))
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(:non-zero-digit (#\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9)
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((decimal-value digit-value)))
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(:octal-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7)
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((character-value character-value)
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(octal-value digit-value)))
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(:zero-to-three (#\0 #\1 #\2 #\3)
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((octal-value digit-value)))
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(:four-to-seven (#\4 #\5 #\6 #\7)
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((octal-value digit-value)))
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(:hex-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 #\A #\B #\C #\D #\E #\F #\a #\b #\c #\d #\e #\f)
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((hex-value digit-value)))
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(:exponent-indicator (#\E #\e) ())
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(:hex-indicator (#\X #\x) ())
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(:plain-string-char (- every (+ (#\' #\" #\\) :octal-digit :line-terminator))
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((character-value character-value)))
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(:string-non-escape (- :non-terminator (+ :octal-digit (#\x #\u #\' #\" #\\ #\b #\f #\n #\r #\t #\v)))
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((character-value character-value))))
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((character-value character identity (*))
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(digit-value integer digit-char-16 ((:global-variable "digitValue") "(" * ")"))))
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(%section "Comments")
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(production :line-comment (#\/ #\/ :line-comment-characters) line-comment)
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(production :line-comment-characters () line-comment-characters-empty)
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(production :line-comment-characters (:line-comment-characters :non-terminator) line-comment-characters-chars)
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(%charclass :non-terminator)
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(production :single-line-block-comment (#\/ #\* :block-comment-characters #\* #\/) single-line-block-comment)
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(production :block-comment-characters () block-comment-characters-empty)
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(production :block-comment-characters (:block-comment-characters :non-terminator-or-slash) block-comment-characters-chars)
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(production :block-comment-characters (:pre-slash-characters #\/) block-comment-characters-slash)
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(production :pre-slash-characters () pre-slash-characters-empty)
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(production :pre-slash-characters (:block-comment-characters :non-terminator-or-asterisk-or-slash) pre-slash-characters-chars)
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(production :pre-slash-characters (:pre-slash-characters #\/) pre-slash-characters-slash)
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(%charclass :non-terminator-or-slash)
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(%charclass :non-terminator-or-asterisk-or-slash)
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(production :multi-line-block-comment (#\/ #\* :multi-line-block-comment-characters :block-comment-characters #\* #\/) multi-line-block-comment)
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(production :multi-line-block-comment-characters (:block-comment-characters :line-terminator) multi-line-block-comment-characters-first)
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(production :multi-line-block-comment-characters (:multi-line-block-comment-characters :block-comment-characters :line-terminator)
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multi-line-block-comment-characters-rest)
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(%section "White space")
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(production :white-space () white-space-empty)
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(production :white-space (:white-space :white-space-character) white-space-character)
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(production :white-space (:white-space :single-line-block-comment) white-space-single-line-block-comment)
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(%charclass :white-space-character)
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(%section "Line breaks")
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(production :line-break (:line-terminator) line-break-line-terminator)
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(production :line-break (:line-comment :line-terminator) line-break-line-comment)
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(production :line-break (:multi-line-block-comment) line-break-multi-line-block-comment)
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(%charclass :line-terminator)
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(production :line-breaks (:line-break) line-breaks-first)
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(production :line-breaks (:line-breaks :white-space :line-break) line-breaks-rest)
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(%section "Tokens")
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(declare-action token :next-token token)
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(production :next-token (:white-space :token) next-token
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(token (token :token)))
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(declare-action token :token token)
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(production :token (:line-breaks) token-line-breaks
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(token (oneof line-breaks)))
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(production :token (:identifier-or-reserved-word) token-identifier-or-reserved-word
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(token (token :identifier-or-reserved-word)))
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(production :token (:punctuator) token-punctuator
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(token (oneof punctuator (punctuator :punctuator))))
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(production :token (:numeric-literal) token-numeric-literal
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(token (oneof number (double-value :numeric-literal))))
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(production :token (:string-literal) token-string-literal
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(token (oneof string (string-value :string-literal))))
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(production :token (:end-of-input) token-end
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(token (oneof end)))
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(production :end-of-input ($end) end-of-input-end)
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(production :end-of-input (:line-comment $end) end-of-input-line-comment)
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(deftype token (oneof (identifier string) (reserved-word string) (punctuator string) (number double) (string string) line-breaks end))
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(%print-actions)
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(%section "Keywords")
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(declare-action name :identifier-name string)
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(production :identifier-name (:identifier-letter) identifier-name-letter
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(name (vector (character-value :identifier-letter))))
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(production :identifier-name (:identifier-name :identifier-letter) identifier-name-next-letter
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(name (append (name :identifier-name) (vector (character-value :identifier-letter)))))
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(production :identifier-name (:identifier-name :decimal-digit) identifier-name-next-digit
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(name (append (name :identifier-name) (vector (character-value :decimal-digit)))))
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(%charclass :identifier-letter)
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(%charclass :decimal-digit)
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(%print-actions)
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(define keywords (vector string)
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(vector "break" "case" "catch" "continue" "default" "delete" "do" "else" "finally" "for" "function" "if" "in"
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"new" "return" "switch" "this" "throw" "try" "typeof" "var" "void" "while" "with"))
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(define future-reserved-words (vector string)
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(vector "class" "const" "debugger" "enum" "export" "extends" "import" "super"))
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(define literals (vector string)
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(vector "null" "true" "false"))
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(define reserved-words (vector string)
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(append keywords (append future-reserved-words literals)))
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(define (member (id string) (list (vector string))) boolean
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(if (empty list)
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false
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(let ((s string (first list)))
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(if (string-equal id s)
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true
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(member id (rest list))))))
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(declare-action token :identifier-or-reserved-word token)
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(production :identifier-or-reserved-word (:identifier-name) identifier-or-reserved-word-identifier-name
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(token (let ((id string (name :identifier-name)))
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(if (member id reserved-words)
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(oneof reserved-word id)
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(oneof identifier id)))))
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(%print-actions)
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(%section "Punctuators")
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(declare-action punctuator :punctuator string)
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(production :punctuator (#\=) punctuator-assignment (punctuator "="))
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(production :punctuator (#\>) punctuator-greater-than (punctuator ">"))
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(production :punctuator (#\<) punctuator-less-than (punctuator "<"))
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(production :punctuator (#\= #\=) punctuator-equal (punctuator "=="))
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(production :punctuator (#\= #\= #\=) punctuator-identical (punctuator "==="))
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(production :punctuator (#\< #\=) punctuator-less-than-or-equal (punctuator "<="))
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(production :punctuator (#\> #\=) punctuator-greater-than-or-equal (punctuator ">="))
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(production :punctuator (#\! #\=) punctuator-not-equal (punctuator "!="))
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(production :punctuator (#\! #\= #\=) punctuator-not-identical (punctuator "!=="))
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(production :punctuator (#\,) punctuator-comma (punctuator ","))
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(production :punctuator (#\!) punctuator-not (punctuator "!"))
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(production :punctuator (#\~) punctuator-complement (punctuator "~"))
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(production :punctuator (#\?) punctuator-question (punctuator "?"))
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(production :punctuator (#\:) punctuator-colon (punctuator ":"))
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(production :punctuator (#\.) punctuator-period (punctuator "."))
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(production :punctuator (#\& #\&) punctuator-logical-and (punctuator "&&"))
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(production :punctuator (#\| #\|) punctuator-logical-or (punctuator "||"))
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(production :punctuator (#\+ #\+) punctuator-increment (punctuator "++"))
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(production :punctuator (#\- #\-) punctuator-decrement (punctuator "--"))
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(production :punctuator (#\+) punctuator-plus (punctuator "+"))
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(production :punctuator (#\-) punctuator-minus (punctuator "-"))
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(production :punctuator (#\*) punctuator-times (punctuator "*"))
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(production :punctuator (#\/) punctuator-divide (punctuator "/"))
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(production :punctuator (#\&) punctuator-and (punctuator "&"))
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(production :punctuator (#\|) punctuator-or (punctuator "|"))
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(production :punctuator (#\^) punctuator-xor (punctuator "^"))
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(production :punctuator (#\%) punctuator-modulo (punctuator "%"))
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(production :punctuator (#\< #\<) punctuator-left-shift (punctuator "<<"))
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(production :punctuator (#\> #\>) punctuator-right-shift (punctuator ">>"))
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(production :punctuator (#\> #\> #\>) punctuator-logical-right-shift (punctuator ">>>"))
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(production :punctuator (#\+ #\=) punctuator-plus-equals (punctuator "+="))
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(production :punctuator (#\- #\=) punctuator-minus-equals (punctuator "-="))
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(production :punctuator (#\* #\=) punctuator-times-equals (punctuator "*="))
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(production :punctuator (#\/ #\=) punctuator-divide-equals (punctuator "/="))
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(production :punctuator (#\& #\=) punctuator-and-equals (punctuator "&="))
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(production :punctuator (#\| #\=) punctuator-or-equals (punctuator "|="))
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(production :punctuator (#\^ #\=) punctuator-xor-equals (punctuator "^="))
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(production :punctuator (#\% #\=) punctuator-modulo-equals (punctuator "%="))
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(production :punctuator (#\< #\< #\=) punctuator-left-shift-equals (punctuator "<<="))
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(production :punctuator (#\> #\> #\=) punctuator-right-shift-equals (punctuator ">>="))
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(production :punctuator (#\> #\> #\> #\=) punctuator-logical-right-shift-equals (punctuator ">>>="))
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(production :punctuator (#\() punctuator-open-parenthesis (punctuator "("))
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(production :punctuator (#\)) punctuator-close-parenthesis (punctuator ")"))
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(production :punctuator (#\{) punctuator-open-brace (punctuator "{"))
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(production :punctuator (#\}) punctuator-close-brace (punctuator "}"))
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(production :punctuator (#\[) punctuator-open-bracket (punctuator "["))
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(production :punctuator (#\]) punctuator-close-bracket (punctuator "]"))
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(production :punctuator (#\;) punctuator-semicolon (punctuator ";"))
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(%print-actions)
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(%section "Numeric literals")
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(declare-action double-value :numeric-literal double)
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(production :numeric-literal (:decimal-literal) numeric-literal-decimal
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(double-value (rational-to-double (rational-value :decimal-literal))))
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(production :numeric-literal (:hex-integer-literal) numeric-literal-hex
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(double-value (rational-to-double (integer-to-rational (integer-value :hex-integer-literal)))))
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(production :numeric-literal (:octal-integer-literal) numeric-literal-octal
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(double-value (rational-to-double (integer-to-rational (integer-value :octal-integer-literal)))))
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(%print-actions)
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(define (expt (base rational) (exponent integer)) rational
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(if (= exponent 0)
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(integer-to-rational 1)
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(if (< exponent 0)
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(rational/ (integer-to-rational 1) (expt base (neg exponent)))
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(rational* base (expt base (- exponent 1))))))
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(declare-action rational-value :decimal-literal rational)
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(production :decimal-literal (:mantissa :exponent) decimal-literal
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(rational-value (rational* (rational-value :mantissa) (expt (integer-to-rational 10) (integer-value :exponent)))))
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(declare-action rational-value :mantissa rational)
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(production :mantissa (:decimal-integer-literal) mantissa-integer
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(rational-value (integer-to-rational (integer-value :decimal-integer-literal))))
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(production :mantissa (:decimal-integer-literal #\.) mantissa-integer-dot
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(rational-value (integer-to-rational (integer-value :decimal-integer-literal))))
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(production :mantissa (:decimal-integer-literal #\. :fraction) mantissa-integer-dot-fraction
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(rational-value (rational+ (integer-to-rational (integer-value :decimal-integer-literal))
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(rational-value :fraction))))
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(production :mantissa (#\. :fraction) mantissa-dot-fraction
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(rational-value (rational-value :fraction)))
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(declare-action integer-value :decimal-integer-literal integer)
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(production :decimal-integer-literal (#\0) decimal-integer-literal-0
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(integer-value 0))
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(production :decimal-integer-literal (:non-zero-decimal-digits) decimal-integer-literal-nonzero
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(integer-value (integer-value :non-zero-decimal-digits)))
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(declare-action integer-value :non-zero-decimal-digits integer)
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(production :non-zero-decimal-digits (:non-zero-digit) non-zero-decimal-digits-first
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(integer-value (decimal-value :non-zero-digit)))
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(production :non-zero-decimal-digits (:non-zero-decimal-digits :decimal-digit) non-zero-decimal-digits-rest
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(integer-value (+ (* 10 (integer-value :non-zero-decimal-digits)) (decimal-value :decimal-digit))))
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(%charclass :non-zero-digit)
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(declare-action rational-value :fraction rational)
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(production :fraction (:decimal-digits) fraction-decimal-digits
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(rational-value (rational/ (integer-to-rational (integer-value :decimal-digits))
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(expt (integer-to-rational 10) (n-digits :decimal-digits)))))
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(%print-actions)
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(declare-action integer-value :exponent integer)
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(production :exponent () exponent-none
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(integer-value 0))
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(production :exponent (:exponent-indicator :signed-integer) exponent-integer
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(integer-value (integer-value :signed-integer)))
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(%charclass :exponent-indicator)
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(declare-action integer-value :signed-integer integer)
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(production :signed-integer (:decimal-digits) signed-integer-no-sign
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(integer-value (integer-value :decimal-digits)))
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(production :signed-integer (#\+ :decimal-digits) signed-integer-plus
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(integer-value (integer-value :decimal-digits)))
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(production :signed-integer (#\- :decimal-digits) signed-integer-minus
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(integer-value (neg (integer-value :decimal-digits))))
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(%print-actions)
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(declare-action integer-value :decimal-digits integer)
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(declare-action n-digits :decimal-digits integer)
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(production :decimal-digits (:decimal-digit) decimal-digits-first
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(integer-value (decimal-value :decimal-digit))
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(n-digits 1))
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(production :decimal-digits (:decimal-digits :decimal-digit) decimal-digits-rest
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(integer-value (+ (* 10 (integer-value :decimal-digits)) (decimal-value :decimal-digit)))
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(n-digits (+ (n-digits :decimal-digits) 1)))
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(%print-actions)
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(declare-action integer-value :hex-integer-literal integer)
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(production :hex-integer-literal (#\0 :hex-indicator :hex-digit) hex-integer-literal-first
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(integer-value (hex-value :hex-digit)))
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(production :hex-integer-literal (:hex-integer-literal :hex-digit) hex-integer-literal-rest
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(integer-value (+ (* 16 (integer-value :hex-integer-literal)) (hex-value :hex-digit))))
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(%charclass :hex-indicator)
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(%charclass :hex-digit)
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(declare-action integer-value :octal-integer-literal integer)
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(production :octal-integer-literal (#\0 :octal-digit) octal-integer-literal-first
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(integer-value (octal-value :octal-digit)))
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(production :octal-integer-literal (:octal-integer-literal :octal-digit) octal-integer-literal-rest
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(integer-value (+ (* 8 (integer-value :octal-integer-literal)) (octal-value :octal-digit))))
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(%charclass :octal-digit)
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(%print-actions)
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(%section "String literals")
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(grammar-argument :quote single double)
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(declare-action string-value :string-literal string)
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(production :string-literal (#\' (:string-chars single) #\') string-literal-single
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(string-value (string-value :string-chars)))
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(production :string-literal (#\" (:string-chars double) #\") string-literal-double
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(string-value (string-value :string-chars)))
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(%print-actions)
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(declare-action string-value (:string-chars :quote) string)
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(production (:string-chars :quote) ((:ordinary-string-chars :quote)) string-chars-ordinary
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(string-value (string-value :ordinary-string-chars)))
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(production (:string-chars :quote) ((:string-chars :quote) #\\ :short-octal-escape) string-chars-short-escape
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(string-value (append (string-value :string-chars)
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(vector (character-value :short-octal-escape)))))
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(declare-action string-value (:ordinary-string-chars :quote) string)
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(production (:ordinary-string-chars :quote) () ordinary-string-chars-empty
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(string-value ""))
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(production (:ordinary-string-chars :quote) ((:string-chars :quote) :plain-string-char) ordinary-string-chars-char
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(string-value (append (string-value :string-chars)
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(vector (character-value :plain-string-char)))))
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(production (:ordinary-string-chars :quote) ((:string-chars :quote) (:plain-string-quote :quote)) ordinary-string-chars-quote
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(string-value (append (string-value :string-chars)
|
|
(vector (character-value :plain-string-quote)))))
|
|
(production (:ordinary-string-chars :quote) ((:ordinary-string-chars :quote) :octal-digit) ordinary-string-chars-octal
|
|
(string-value (append (string-value :ordinary-string-chars)
|
|
(vector (character-value :octal-digit)))))
|
|
(production (:ordinary-string-chars :quote) ((:string-chars :quote) #\\ :ordinary-escape) ordinary-string-chars-escape
|
|
(string-value (append (string-value :string-chars)
|
|
(vector (character-value :ordinary-escape)))))
|
|
|
|
(%charclass :plain-string-char)
|
|
|
|
(declare-action character-value (:plain-string-quote :quote) character)
|
|
(production (:plain-string-quote single) (#\") plain-string-quote-single
|
|
(character-value #\"))
|
|
(production (:plain-string-quote double) (#\') plain-string-quote-double
|
|
(character-value #\'))
|
|
(%print-actions)
|
|
|
|
(declare-action character-value :ordinary-escape character)
|
|
(production :ordinary-escape (:string-char-escape) ordinary-escape-character
|
|
(character-value (character-value :string-char-escape)))
|
|
(production :ordinary-escape (:full-octal-escape) ordinary-escape-full-octal
|
|
(character-value (character-value :full-octal-escape)))
|
|
(production :ordinary-escape (:hex-escape) ordinary-escape-hex
|
|
(character-value (character-value :hex-escape)))
|
|
(production :ordinary-escape (:unicode-escape) ordinary-escape-unicode
|
|
(character-value (character-value :unicode-escape)))
|
|
(production :ordinary-escape (:string-non-escape) ordinary-escape-non-escape
|
|
(character-value (character-value :string-non-escape)))
|
|
(%charclass :string-non-escape)
|
|
(%print-actions)
|
|
|
|
(declare-action character-value :string-char-escape character)
|
|
(production :string-char-escape (#\') string-char-escape-single-quote (character-value #\'))
|
|
(production :string-char-escape (#\") string-char-escape-double-quote (character-value #\"))
|
|
(production :string-char-escape (#\\) string-char-escape-backslash (character-value #\\))
|
|
(production :string-char-escape (#\b) string-char-escape-backspace (character-value #?0008))
|
|
(production :string-char-escape (#\f) string-char-escape-form-feed (character-value #?000C))
|
|
(production :string-char-escape (#\n) string-char-escape-new-line (character-value #?000A))
|
|
(production :string-char-escape (#\r) string-char-escape-return (character-value #?000D))
|
|
(production :string-char-escape (#\t) string-char-escape-tab (character-value #?0009))
|
|
(production :string-char-escape (#\v) string-char-escape-vertical-tab (character-value #?000B))
|
|
(%print-actions)
|
|
|
|
(declare-action character-value :short-octal-escape character)
|
|
(production :short-octal-escape (:octal-digit) short-octal-escape-1
|
|
(character-value (code-to-character (octal-value :octal-digit))))
|
|
(production :short-octal-escape (:zero-to-three :octal-digit) short-octal-escape-2
|
|
(character-value (code-to-character (+ (* 8 (octal-value :zero-to-three))
|
|
(octal-value :octal-digit)))))
|
|
|
|
(declare-action character-value :full-octal-escape character)
|
|
(production :full-octal-escape (:four-to-seven :octal-digit) full-octal-escape-2
|
|
(character-value (code-to-character (+ (* 8 (octal-value :four-to-seven))
|
|
(octal-value :octal-digit)))))
|
|
(production :full-octal-escape (:zero-to-three :octal-digit :octal-digit) full-octal-escape-3
|
|
(character-value (code-to-character (+ (+ (* 64 (octal-value :zero-to-three))
|
|
(* 8 (octal-value :octal-digit 1)))
|
|
(octal-value :octal-digit 2)))))
|
|
(%charclass :zero-to-three)
|
|
(%charclass :four-to-seven)
|
|
|
|
(declare-action character-value :hex-escape character)
|
|
(production :hex-escape (#\x :hex-digit :hex-digit) hex-escape-2
|
|
(character-value (code-to-character (+ (* 16 (hex-value :hex-digit 1))
|
|
(hex-value :hex-digit 2)))))
|
|
|
|
(declare-action character-value :unicode-escape character)
|
|
(production :unicode-escape (#\u :hex-digit :hex-digit :hex-digit :hex-digit) unicode-escape-4
|
|
(character-value (code-to-character (+ (+ (+ (* 4096 (hex-value :hex-digit 1))
|
|
(* 256 (hex-value :hex-digit 2)))
|
|
(* 16 (hex-value :hex-digit 3)))
|
|
(hex-value :hex-digit 4)))))
|
|
(%print-actions)
|
|
|
|
)))
|
|
|
|
(defparameter *ll* (world-lexer *lw* 'code-lexer))
|
|
(defparameter *lg* (lexer-grammar *ll*))
|
|
(set-up-lexer-metagrammar *ll*)
|
|
(defparameter *lm* (lexer-metagrammar *ll*)))
|
|
|
|
#|
|
|
(depict-rtf-to-local-file
|
|
"ECMA Lexer Charclasses.rtf"
|
|
#'(lambda (rtf-stream)
|
|
(depict-paragraph (rtf-stream ':grammar-header)
|
|
(depict rtf-stream "Character Classes"))
|
|
(dolist (charclass (lexer-charclasses *ll*))
|
|
(depict-charclass rtf-stream charclass))
|
|
(depict-paragraph (rtf-stream ':grammar-header)
|
|
(depict rtf-stream "Grammar"))
|
|
(depict-grammar rtf-stream *lg*)))
|
|
|
|
(depict-rtf-to-local-file
|
|
"ECMA Lexer.rtf"
|
|
#'(lambda (rtf-stream)
|
|
(depict-world-commands rtf-stream *lw*)))
|
|
|
|
(depict-html-to-local-file
|
|
"ECMA Lexer.html"
|
|
#'(lambda (rtf-stream)
|
|
(depict-world-commands rtf-stream *lw*))
|
|
"ECMA Lexer")
|
|
|
|
(with-local-output (s "ECMA Lexer.txt") (print-lexer *ll* s) (print-grammar *lg* s))
|
|
|
|
(print-illegal-strings m)
|
|
|
|
(lexer-pparse *ll* "0x20")
|
|
(lexer-pparse *ll* "2b")
|
|
(lexer-pparse *ll* " 3.75" :trace t)
|
|
(lexer-pparse *ll* "25" :trace :code)
|
|
(lexer-pmetaparse *ll* "32+abc//23e-a4*7e-2 3 id4 4ef;")
|
|
(lexer-pmetaparse *ll* "32+abc//23e-a4*7e-2 3 id4 4ef;
|
|
")
|
|
(lexer-pmetaparse *ll* "32+abc/ /23e-a4*7e-2 3 /*id4 4*-/ef;
|
|
|
|
fjds*/y//z")
|
|
(lexer-pmetaparse *ll* "3a+in'a+b\\147\"de'\"'\"")
|
|
|#
|
|
|
|
|
|
; Return the ECMAScript input string as a list of tokens like:
|
|
; (($number . 3.0) + - ++ else ($string . "a+bgde") ($end))
|
|
; Line breaks are removed.
|
|
(defun tokenize (string)
|
|
(delete
|
|
'($line-breaks)
|
|
(mapcar
|
|
#'(lambda (token-value)
|
|
(let ((token-value (car token-value)))
|
|
(ecase (car token-value)
|
|
(identifier (cons '$identifier (cdr token-value)))
|
|
((reserved-word punctuator) (intern (string-upcase (cdr token-value))))
|
|
(number (cons '$number (cdr token-value)))
|
|
(string (cons '$string (cdr token-value)))
|
|
(line-breaks '($line-breaks))
|
|
(end '($end)))))
|
|
(lexer-metaparse *ll* string))
|
|
:test #'equal))
|
|
|
|
|