gecko-dev/js2/semantics/JS20/Lexer.lisp

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36 KiB
Common Lisp

;;; The contents of this file are subject to the Netscape Public License
;;; Version 1.0 (the "NPL"); you may not use this file except in
;;; compliance with the NPL. You may obtain a copy of the NPL at
;;; http://www.mozilla.org/NPL/
;;;
;;; Software distributed under the NPL is distributed on an "AS IS" basis,
;;; WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
;;; for the specific language governing rights and limitations under the
;;; NPL.
;;;
;;; The Initial Developer of this code under the NPL is Netscape
;;; Communications Corporation. Portions created by Netscape are
;;; Copyright (C) 1998 Netscape Communications Corporation. All Rights
;;; Reserved.
;;;
;;; JavaScript 2.0 lexer
;;;
;;; Waldemar Horwat (waldemar@netscape.com)
;;;
(progn
(defparameter *lw*
(generate-world
"L"
'((lexer code-lexer
:lalr-1
:$next-token
((:unicode-character (% every (:text "Any Unicode character")) () t)
(:unicode-initial-alphabetic
(% initial-alpha (:text "Any Unicode initial alphabetic character (includes ASCII "
(:character-literal #\A) :nbhy (:character-literal #\Z) " and "
(:character-literal #\a) :nbhy (:character-literal #\z) ")"))
() t)
(:unicode-alphanumeric
(% alphanumeric (:text "Any Unicode alphabetic or decimal digit character (includes ASCII "
(:character-literal #\0) :nbhy (:character-literal #\9) ", "
(:character-literal #\A) :nbhy (:character-literal #\Z) ", and "
(:character-literal #\a) :nbhy (:character-literal #\z) ")"))
() t)
(:white-space-character (++ (#?0009 #?000B #?000C #\space #?00A0)
(#?2000 #?2001 #?2002 #?2003 #?2004 #?2005 #?2006 #?2007)
(#?2008 #?2009 #?200A #?200B)
(#?3000)) ())
(:line-terminator (#?000A #?000D #?2028 #?2029) ())
(:non-terminator (- :unicode-character :line-terminator)
(($default-action $default-action)))
(:non-slash (- :unicode-character (#\/)) ())
(:non-asterisk-or-slash (- :unicode-character (#\* #\/)) ())
(:ordinary-initial-identifier-character (+ :unicode-initial-alphabetic (#\$ #\_))
(($default-action $default-action)))
(:ordinary-continuing-identifier-character (+ :unicode-alphanumeric (#\$ #\_))
(($default-action $default-action)))
(:a-s-c-i-i-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9)
(($default-action $default-action)
(decimal-value $digit-value)))
(:non-zero-digit (#\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9)
((decimal-value $digit-value)))
(:octal-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7)
(($default-action $default-action)
(octal-value $digit-value)))
(:zero-to-three (#\0 #\1 #\2 #\3)
((octal-value $digit-value)))
(:four-to-seven (#\4 #\5 #\6 #\7)
((octal-value $digit-value)))
(:hex-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 #\A #\B #\C #\D #\E #\F #\a #\b #\c #\d #\e #\f)
((hex-value $digit-value)))
(:letter-e (#\E #\e) (($default-action $default-action)))
(:letter-x (#\X #\x) (($default-action $default-action)))
((:literal-string-char single) (- :unicode-character (+ (#\' #\\) :line-terminator))
(($default-action $default-action)))
((:literal-string-char double) (- :unicode-character (+ (#\" #\\) :line-terminator))
(($default-action $default-action)))
(:identity-escape (- :non-terminator :unicode-alphanumeric)
(($default-action $default-action)))
(:ordinary-reg-exp-first-char (- :non-terminator (#\\ #\/ #\*))
(($default-action $default-action)))
((:ordinary-reg-exp-char slash) (- :non-terminator (#\\ #\/))
(($default-action $default-action)))
((:ordinary-reg-exp-char guillemet) (- :non-terminator (#\\ #?00BB))
(($default-action $default-action))))
(($default-action character nil identity)
($digit-value integer digit-value digit-char-36)))
(rule :$next-token
((token token) (reg-exp-may-follow boolean))
(production :$next-token ($re (:next-token re)) $next-token-re
(token (token :next-token))
(reg-exp-may-follow (reg-exp-may-follow :next-token)))
(production :$next-token ($non-re (:next-token div)) $next-token-non-re
(token (token :next-token))
(reg-exp-may-follow (reg-exp-may-follow :next-token))))
(%text nil "The start symbols are " (:grammar-symbol (:next-token re)) " and " (:grammar-symbol (:next-token div))
" depending on whether a " (:character-literal #\/) " should be interpreted as a regular expression or division.")
(%section "Unicode Character Classes")
(%charclass :unicode-character)
(%charclass :unicode-initial-alphabetic)
(%charclass :unicode-alphanumeric)
(%charclass :white-space-character)
(%charclass :line-terminator)
(%charclass :a-s-c-i-i-digit)
(%print-actions)
(%section "Comments")
(production :line-comment (#\/ #\/ :line-comment-characters) line-comment)
(production :line-comment-characters () line-comment-characters-empty)
(production :line-comment-characters (:line-comment-characters :non-terminator) line-comment-characters-chars)
(%charclass :non-terminator)
(production :block-comment (#\/ #\* :block-comment-characters #\* #\/) block-comment)
(production :block-comment-characters () block-comment-characters-empty)
(production :block-comment-characters (:block-comment-characters :non-slash) block-comment-characters-chars)
(production :block-comment-characters (:pre-slash-characters #\/) block-comment-characters-slash)
(production :pre-slash-characters () pre-slash-characters-empty)
(production :pre-slash-characters (:block-comment-characters :non-asterisk-or-slash) pre-slash-characters-chars)
(production :pre-slash-characters (:pre-slash-characters #\/) pre-slash-characters-slash)
(%charclass :non-slash)
(%charclass :non-asterisk-or-slash)
(%print-actions)
(%section "White space")
(production :white-space () white-space-empty)
(production :white-space (:white-space :white-space-character) white-space-character)
(production :white-space (:white-space :line-terminator) white-space-line-terminator)
(production :white-space (:white-space :line-comment :line-terminator) white-space-line-comment)
(production :white-space (:white-space :block-comment) white-space-block-comment)
(%section "Tokens")
(grammar-argument :tau re div)
(rule (:next-token :tau)
((token token) (reg-exp-may-follow boolean))
(production (:next-token :tau) (:white-space (:token :tau)) next-token
(token (token :token))
(reg-exp-may-follow (reg-exp-may-follow :token))))
(rule (:token :tau)
((token token) (reg-exp-may-follow boolean))
(production (:token :tau) (:identifier-or-reserved-word) token-identifier-or-reserved-word
(token (token :identifier-or-reserved-word))
(reg-exp-may-follow (reg-exp-may-follow :identifier-or-reserved-word)))
(production (:token :tau) (:punctuator) token-punctuator
(token (token :punctuator))
(reg-exp-may-follow (reg-exp-may-follow :punctuator)))
(production (:token div) (:division-punctuator) token-division-punctuator
(token (oneof punctuator (punctuator :division-punctuator)))
(reg-exp-may-follow true))
(production (:token :tau) (:numeric-literal) token-numeric-literal
(token (oneof number (double-value :numeric-literal)))
(reg-exp-may-follow false))
(production (:token :tau) (:quantity-literal) token-quantity-literal
(token (oneof quantity (quantity-value :quantity-literal)))
(reg-exp-may-follow false))
(production (:token :tau) (:string-literal) token-string-literal
(token (oneof string (string-value :string-literal)))
(reg-exp-may-follow false))
(production (:token re) ((:reg-exp-literal slash)) token-reg-exp-literal-slash
(token (oneof regular-expression (r-e-value :reg-exp-literal)))
(reg-exp-may-follow false))
(production (:token :tau) ((:reg-exp-literal guillemet)) token-reg-exp-literal-guillemet
(token (oneof regular-expression (r-e-value :reg-exp-literal)))
(reg-exp-may-follow false))
(production (:token :tau) (:end-of-input) token-end
(token (oneof end))
(reg-exp-may-follow true)))
(production :end-of-input ($end) end-of-input-end)
(production :end-of-input (:line-comment $end) end-of-input-line-comment)
(deftype reg-exp (tuple (re-body string)
(re-flags string)))
(deftype quantity (tuple (amount double)
(unit string)))
(deftype token (oneof (identifier string)
(keyword string)
(punctuator string)
(number double)
(quantity quantity)
(string string)
(regular-expression reg-exp)
end))
(%print-actions)
(%section "Keywords and identifiers")
(rule :identifier-name
((name string) (contains-escapes boolean))
(production :identifier-name (:initial-identifier-character) identifier-name-initial
(name (vector (character-value :initial-identifier-character)))
(contains-escapes (contains-escapes :initial-identifier-character)))
(production :identifier-name (:identifier-name :continuing-identifier-character) identifier-name-continuing
(name (append (name :identifier-name) (vector (character-value :continuing-identifier-character))))
(contains-escapes (or (contains-escapes :identifier-name)
(contains-escapes :continuing-identifier-character)))))
(rule :initial-identifier-character
((character-value character) (contains-escapes boolean))
(production :initial-identifier-character (:ordinary-initial-identifier-character) initial-identifier-character-ordinary
(character-value ($default-action :ordinary-initial-identifier-character))
(contains-escapes false))
(production :initial-identifier-character (#\\ :hex-escape) initial-identifier-character-escape
(character-value (if (is-ordinary-initial-identifier-character (character-value :hex-escape))
(character-value :hex-escape)
(bottom character)))
(contains-escapes true)))
(%charclass :ordinary-initial-identifier-character)
(rule :continuing-identifier-character
((character-value character) (contains-escapes boolean))
(production :continuing-identifier-character (:ordinary-continuing-identifier-character) continuing-identifier-character-ordinary
(character-value ($default-action :ordinary-continuing-identifier-character))
(contains-escapes false))
(production :continuing-identifier-character (#\\ :hex-escape) continuing-identifier-character-escape
(character-value (if (is-ordinary-continuing-identifier-character (character-value :hex-escape))
(character-value :hex-escape)
(bottom character)))
(contains-escapes true)))
(%charclass :ordinary-continuing-identifier-character)
(%print-actions)
(define reserved-words-r-e (vector string)
(vector "abstract" "break" "case" "catch" "class" "const" "continue" "debugger" "default" "delete" "do" "else" "enum"
"eval" "export" "extends" "field" "final" "finally" "for" "function" "goto" "if" "implements" "import" "in"
"instanceof" "native" "new" "package" "private" "protected" "public" "return" "static" "switch" "synchronized"
"throw" "throws" "transient" "try" "typeof" "var" "volatile" "while" "with"))
(define reserved-words-div (vector string)
(vector "false" "null" "super" "this" "true"))
(define non-reserved-words (vector string)
(vector "constructor" "getter" "method" "override" "setter" "traditional" "version"))
(define keywords (vector string)
(append reserved-words-r-e (append reserved-words-div non-reserved-words)))
(define (member (id string) (list (vector string))) boolean
(if (empty list)
false
(if (string-equal id (nth list 0))
true
(member id (subseq list 1)))))
(rule :identifier-or-reserved-word
((token token) (reg-exp-may-follow boolean))
(production :identifier-or-reserved-word (:identifier-name) identifier-or-reserved-word-identifier-name
(token (let ((id string (name :identifier-name)))
(if (and (member id keywords) (not (contains-escapes :identifier-name)))
(oneof keyword id)
(oneof identifier id))))
(reg-exp-may-follow (let ((id string (name :identifier-name)))
(and (member id reserved-words-r-e) (not (contains-escapes :identifier-name)))))))
(%print-actions)
(%section "Punctuators")
(rule :punctuator
((token token) (reg-exp-may-follow boolean))
(production :punctuator (:punctuator-r-e) punctuator-r-e
(token (oneof punctuator (punctuator :punctuator-r-e)))
(reg-exp-may-follow true))
(production :punctuator (:punctuator-div) punctuator-div
(token (oneof punctuator (punctuator :punctuator-div)))
(reg-exp-may-follow false)))
(rule :punctuator-r-e ((punctuator string))
(production :punctuator-r-e (#\!) punctuator-not (punctuator "!"))
(production :punctuator-r-e (#\! #\=) punctuator-not-equal (punctuator "!="))
(production :punctuator-r-e (#\! #\= #\=) punctuator-not-identical (punctuator "!=="))
(production :punctuator-r-e (#\#) punctuator-hash (punctuator "#"))
(production :punctuator-r-e (#\%) punctuator-modulo (punctuator "%"))
(production :punctuator-r-e (#\% #\=) punctuator-modulo-equals (punctuator "%="))
(production :punctuator-r-e (#\&) punctuator-and (punctuator "&"))
(production :punctuator-r-e (#\& #\&) punctuator-logical-and (punctuator "&&"))
(production :punctuator-r-e (#\& #\& #\=) punctuator-logical-and-equals (punctuator "&&="))
(production :punctuator-r-e (#\& #\=) punctuator-and-equals (punctuator "&="))
(production :punctuator-r-e (#\() punctuator-open-parenthesis (punctuator "("))
(production :punctuator-r-e (#\*) punctuator-times (punctuator "*"))
(production :punctuator-r-e (#\* #\=) punctuator-times-equals (punctuator "*="))
(production :punctuator-r-e (#\+) punctuator-plus (punctuator "+"))
(production :punctuator-r-e (#\+ #\=) punctuator-plus-equals (punctuator "+="))
(production :punctuator-r-e (#\,) punctuator-comma (punctuator ","))
(production :punctuator-r-e (#\-) punctuator-minus (punctuator "-"))
(production :punctuator-r-e (#\- #\=) punctuator-minus-equals (punctuator "-="))
(production :punctuator-r-e (#\- #\>) punctuator-arrow (punctuator "->"))
(production :punctuator-r-e (#\.) punctuator-period (punctuator "."))
(production :punctuator-r-e (#\. #\.) punctuator-double-dot (punctuator ".."))
(production :punctuator-r-e (#\. #\. #\.) punctuator-triple-dot (punctuator "..."))
(production :punctuator-r-e (#\:) punctuator-colon (punctuator ":"))
(production :punctuator-r-e (#\: #\:) punctuator-namespace (punctuator "::"))
(production :punctuator-r-e (#\;) punctuator-semicolon (punctuator ";"))
(production :punctuator-r-e (#\<) punctuator-less-than (punctuator "<"))
(production :punctuator-r-e (#\< #\<) punctuator-left-shift (punctuator "<<"))
(production :punctuator-r-e (#\< #\< #\=) punctuator-left-shift-equals (punctuator "<<="))
(production :punctuator-r-e (#\< #\=) punctuator-less-than-or-equal (punctuator "<="))
(production :punctuator-r-e (#\=) punctuator-assignment (punctuator "="))
(production :punctuator-r-e (#\= #\=) punctuator-equal (punctuator "=="))
(production :punctuator-r-e (#\= #\= #\=) punctuator-identical (punctuator "==="))
(production :punctuator-r-e (#\>) punctuator-greater-than (punctuator ">"))
(production :punctuator-r-e (#\> #\=) punctuator-greater-than-or-equal (punctuator ">="))
(production :punctuator-r-e (#\> #\>) punctuator-right-shift (punctuator ">>"))
(production :punctuator-r-e (#\> #\> #\=) punctuator-right-shift-equals (punctuator ">>="))
(production :punctuator-r-e (#\> #\> #\>) punctuator-logical-right-shift (punctuator ">>>"))
(production :punctuator-r-e (#\> #\> #\> #\=) punctuator-logical-right-shift-equals (punctuator ">>>="))
(production :punctuator-r-e (#\?) punctuator-question (punctuator "?"))
(production :punctuator-r-e (#\@) punctuator-at (punctuator "@"))
(production :punctuator-r-e (#\[) punctuator-open-bracket (punctuator "["))
(production :punctuator-r-e (#\^) punctuator-xor (punctuator "^"))
(production :punctuator-r-e (#\^ #\=) punctuator-xor-equals (punctuator "^="))
(production :punctuator-r-e (#\^ #\^) punctuator-logical-xor (punctuator "^^"))
(production :punctuator-r-e (#\^ #\^ #\=) punctuator-logical-xor-equals (punctuator "^^="))
(production :punctuator-r-e (#\{) punctuator-open-brace (punctuator "{"))
(production :punctuator-r-e (#\|) punctuator-or (punctuator "|"))
(production :punctuator-r-e (#\| #\=) punctuator-or-equals (punctuator "|="))
(production :punctuator-r-e (#\| #\|) punctuator-logical-or (punctuator "||"))
(production :punctuator-r-e (#\| #\| #\=) punctuator-logical-or-equals (punctuator "||="))
(production :punctuator-r-e (#\~) punctuator-complement (punctuator "~")))
(rule :punctuator-div ((punctuator string))
(production :punctuator-div (#\)) punctuator-close-parenthesis (punctuator ")"))
(production :punctuator-div (#\+ #\+) punctuator-increment (punctuator "++"))
(production :punctuator-div (#\- #\-) punctuator-decrement (punctuator "--"))
(production :punctuator-div (#\]) punctuator-close-bracket (punctuator "]"))
(production :punctuator-div (#\}) punctuator-close-brace (punctuator "}")))
(rule :division-punctuator ((punctuator string))
(production :division-punctuator (#\/) punctuator-divide (punctuator "/"))
(production :division-punctuator (#\/ #\=) punctuator-divide-equals (punctuator "/=")))
(%print-actions)
(%section "Numeric literals")
(rule :numeric-literal ((double-value double))
(production :numeric-literal (:decimal-literal) numeric-literal-decimal
(double-value (rational-to-double (rational-value :decimal-literal))))
(production :numeric-literal (:hex-integer-literal (:- :hex-digit)) numeric-literal-hex
(double-value (rational-to-double (integer-to-rational (integer-value :hex-integer-literal)))))
(production :numeric-literal (:octal-integer-literal) numeric-literal-octal
(double-value (rational-to-double (integer-to-rational (integer-value :octal-integer-literal))))))
(%print-actions)
(define (expt (base rational) (exponent integer)) rational
(if (= exponent 0)
(integer-to-rational 1)
(if (< exponent 0)
(rational/ (integer-to-rational 1) (expt base (neg exponent)))
(rational* base (expt base (- exponent 1))))))
(rule :decimal-literal ((rational-value rational))
(production :decimal-literal (:mantissa) decimal-literal
(rational-value (rational-value :mantissa)))
(production :decimal-literal (:mantissa :letter-e :signed-integer) decimal-literal-exponent
(rational-value (rational* (rational-value :mantissa) (expt (integer-to-rational 10) (integer-value :signed-integer))))))
(%charclass :letter-e)
(rule :mantissa ((rational-value rational))
(production :mantissa (:decimal-integer-literal) mantissa-integer
(rational-value (integer-to-rational (integer-value :decimal-integer-literal))))
(production :mantissa (:decimal-integer-literal #\.) mantissa-integer-dot
(rational-value (integer-to-rational (integer-value :decimal-integer-literal))))
(production :mantissa (:decimal-integer-literal #\. :fraction) mantissa-integer-dot-fraction
(rational-value (rational+ (integer-to-rational (integer-value :decimal-integer-literal))
(rational-value :fraction))))
(production :mantissa (#\. :fraction) mantissa-dot-fraction
(rational-value (rational-value :fraction))))
(rule :decimal-integer-literal ((integer-value integer))
(production :decimal-integer-literal (#\0) decimal-integer-literal-0
(integer-value 0))
(production :decimal-integer-literal (:non-zero-decimal-digits) decimal-integer-literal-nonzero
(integer-value (integer-value :non-zero-decimal-digits))))
(rule :non-zero-decimal-digits ((integer-value integer))
(production :non-zero-decimal-digits (:non-zero-digit) non-zero-decimal-digits-first
(integer-value (decimal-value :non-zero-digit)))
(production :non-zero-decimal-digits (:non-zero-decimal-digits :a-s-c-i-i-digit) non-zero-decimal-digits-rest
(integer-value (+ (* 10 (integer-value :non-zero-decimal-digits)) (decimal-value :a-s-c-i-i-digit)))))
(%charclass :non-zero-digit)
(rule :fraction ((rational-value rational))
(production :fraction (:decimal-digits) fraction-decimal-digits
(rational-value (rational/ (integer-to-rational (integer-value :decimal-digits))
(expt (integer-to-rational 10) (n-digits :decimal-digits))))))
(%print-actions)
(rule :signed-integer ((integer-value integer))
(production :signed-integer (:decimal-digits) signed-integer-no-sign
(integer-value (integer-value :decimal-digits)))
(production :signed-integer (#\+ :decimal-digits) signed-integer-plus
(integer-value (integer-value :decimal-digits)))
(production :signed-integer (#\- :decimal-digits) signed-integer-minus
(integer-value (neg (integer-value :decimal-digits)))))
(%print-actions)
(rule :decimal-digits
((integer-value integer) (n-digits integer))
(production :decimal-digits (:a-s-c-i-i-digit) decimal-digits-first
(integer-value (decimal-value :a-s-c-i-i-digit))
(n-digits 1))
(production :decimal-digits (:decimal-digits :a-s-c-i-i-digit) decimal-digits-rest
(integer-value (+ (* 10 (integer-value :decimal-digits)) (decimal-value :a-s-c-i-i-digit)))
(n-digits (+ (n-digits :decimal-digits) 1))))
(%print-actions)
(rule :hex-integer-literal ((integer-value integer))
(production :hex-integer-literal (#\0 :letter-x :hex-digit) hex-integer-literal-first
(integer-value (hex-value :hex-digit)))
(production :hex-integer-literal (:hex-integer-literal :hex-digit) hex-integer-literal-rest
(integer-value (+ (* 16 (integer-value :hex-integer-literal)) (hex-value :hex-digit)))))
(%charclass :letter-x)
(%charclass :hex-digit)
(rule :octal-integer-literal ((integer-value integer))
(production :octal-integer-literal (#\0 :octal-digit) octal-integer-literal-first
(integer-value (octal-value :octal-digit)))
(production :octal-integer-literal (:octal-integer-literal :octal-digit) octal-integer-literal-rest
(integer-value (+ (* 8 (integer-value :octal-integer-literal)) (octal-value :octal-digit)))))
(%charclass :octal-digit)
(%print-actions)
(%section "Quantity literals")
(rule :quantity-literal ((quantity-value quantity))
(production :quantity-literal (:numeric-literal :quantity-name) quantity-literal-quantity-name
(quantity-value (tuple quantity (double-value :numeric-literal) (name :quantity-name)))))
(rule :quantity-name ((name string))
(production :quantity-name ((:- :letter-e :letter-x) :identifier-name) quantity-name-identifier
(name (name :identifier-name)))
;(production :quantity-name (:letter-x :identifier-name) quantity-name-x-identifier
; (name (append (vector ($default-action :letter-x)) (name :identifier-name))))
)
(%print-actions)
(%section "String literals")
(grammar-argument :theta single double)
(rule :string-literal ((string-value string))
(production :string-literal (#\' (:string-chars single) #\') string-literal-single
(string-value (string-value :string-chars)))
(production :string-literal (#\" (:string-chars double) #\") string-literal-double
(string-value (string-value :string-chars))))
(%print-actions)
(rule (:string-chars :theta) ((string-value string))
(production (:string-chars :theta) () string-chars-none
(string-value ""))
(production (:string-chars :theta) ((:string-chars :theta) (:string-char :theta)) string-chars-some
(string-value (append (string-value :string-chars)
(vector (character-value :string-char))))))
(rule (:string-char :theta) ((character-value character))
(production (:string-char :theta) ((:literal-string-char :theta)) string-char-literal
(character-value ($default-action :literal-string-char)))
(production (:string-char :theta) (#\\ :string-escape) string-char-escape
(character-value (character-value :string-escape))))
(%charclass (:literal-string-char single))
(%charclass (:literal-string-char double))
(%print-actions)
(rule :string-escape ((character-value character))
(production :string-escape (:control-escape) string-escape-control
(character-value (character-value :control-escape)))
(production :string-escape (:octal-escape) string-escape-octal
(character-value (character-value :octal-escape)))
(production :string-escape (:hex-escape) string-escape-hex
(character-value (character-value :hex-escape)))
(production :string-escape (:identity-escape) string-escape-non-escape
(character-value ($default-action :identity-escape))))
(%charclass :identity-escape)
(%print-actions)
(rule :control-escape ((character-value character))
(production :control-escape (#\b) control-escape-backspace (character-value #?0008))
(production :control-escape (#\f) control-escape-form-feed (character-value #?000C))
(production :control-escape (#\n) control-escape-new-line (character-value #?000A))
(production :control-escape (#\r) control-escape-return (character-value #?000D))
(production :control-escape (#\t) control-escape-tab (character-value #?0009))
(production :control-escape (#\v) control-escape-vertical-tab (character-value #?000B)))
(%print-actions)
(rule :octal-escape ((character-value character))
(production :octal-escape (:octal-digit (:- :octal-digit)) octal-escape-1
(character-value (code-to-character (octal-value :octal-digit))))
(production :octal-escape (:zero-to-three :octal-digit (:- :octal-digit)) octal-escape-2-low
(character-value (code-to-character (+ (* 8 (octal-value :zero-to-three))
(octal-value :octal-digit)))))
(production :octal-escape (:four-to-seven :octal-digit) octal-escape-2-high
(character-value (code-to-character (+ (* 8 (octal-value :four-to-seven))
(octal-value :octal-digit)))))
(production :octal-escape (:zero-to-three :octal-digit :octal-digit) 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)
(%print-actions)
(rule :hex-escape ((character-value 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)))))
(production :hex-escape (#\u :hex-digit :hex-digit :hex-digit :hex-digit) hex-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)
(%section "Regular expression literals")
(grammar-argument :rho slash guillemet)
(rule (:reg-exp-literal :rho) ((r-e-value reg-exp))
(production (:reg-exp-literal :rho) ((:reg-exp-body :rho) :reg-exp-flags) reg-exp-literal
(r-e-value (tuple reg-exp (r-e-body :reg-exp-body) (r-e-flags :reg-exp-flags)))))
(rule :reg-exp-flags ((r-e-flags string))
(production :reg-exp-flags () reg-exp-flags-none
(r-e-flags ""))
(production :reg-exp-flags (:reg-exp-flags :continuing-identifier-character) reg-exp-flags-more
(r-e-flags (append (r-e-flags :reg-exp-flags) (vector (character-value :continuing-identifier-character))))))
(rule (:reg-exp-body :rho) ((r-e-body string))
(production (:reg-exp-body slash) (#\/ :reg-exp-first-char (:reg-exp-chars slash) #\/) reg-exp-body-slash
(r-e-body (append (r-e-body :reg-exp-first-char)
(r-e-body :reg-exp-chars))))
(production (:reg-exp-body guillemet) (#?00AB (:reg-exp-chars guillemet) #?00BB) reg-exp-body-guillemet
(r-e-body (r-e-body :reg-exp-chars))))
(rule :reg-exp-first-char ((r-e-body string))
(production :reg-exp-first-char (:ordinary-reg-exp-first-char) reg-exp-first-char-ordinary
(r-e-body (vector ($default-action :ordinary-reg-exp-first-char))))
(production :reg-exp-first-char (#\\ :non-terminator) reg-exp-first-char-escape
(r-e-body (vector #\\ ($default-action :non-terminator)))))
(%charclass :ordinary-reg-exp-first-char)
(rule (:reg-exp-chars :rho) ((r-e-body string))
(production (:reg-exp-chars :rho) () reg-exp-chars-none
(r-e-body ""))
(production (:reg-exp-chars :rho) ((:reg-exp-chars :rho) (:reg-exp-char :rho)) reg-exp-chars-more
(r-e-body (append (r-e-body :reg-exp-chars)
(r-e-body :reg-exp-char)))))
(rule (:reg-exp-char :rho) ((r-e-body string))
(production (:reg-exp-char :rho) ((:ordinary-reg-exp-char :rho)) reg-exp-char-ordinary
(r-e-body (vector ($default-action :ordinary-reg-exp-char))))
(production (:reg-exp-char :rho) (#\\ :non-terminator) reg-exp-char-escape
(r-e-body (vector #\\ ($default-action :non-terminator)))))
(%charclass (:ordinary-reg-exp-char slash))
(%charclass (:ordinary-reg-exp-char guillemet))
)))
(defparameter *ll* (world-lexer *lw* 'code-lexer))
(defparameter *lg* (lexer-grammar *ll*))
(set-up-lexer-metagrammar *ll*)
(defparameter *lm* (lexer-metagrammar *ll*)))
#|
(depict-rtf-to-local-file
";JS20;LexerCharClasses.rtf"
"JavaScript 2 Lexer Character Classes"
#'(lambda (rtf-stream)
(depict-paragraph (rtf-stream ':grammar-header)
(depict rtf-stream "Character Classes"))
(dolist (charclass (lexer-charclasses *ll*))
(depict-charclass rtf-stream charclass))
(depict-paragraph (rtf-stream ':grammar-header)
(depict rtf-stream "Grammar"))
(depict-grammar rtf-stream *lg*)))
(progn
(depict-rtf-to-local-file
";JS20;LexerGrammar.rtf"
"JavaScript 2 Lexer Grammar"
#'(lambda (rtf-stream)
(depict-world-commands rtf-stream *lw* :visible-semantics nil)))
(depict-rtf-to-local-file
";JS20;LexerSemantics.rtf"
"JavaScript 2 Lexer Semantics"
#'(lambda (rtf-stream)
(depict-world-commands rtf-stream *lw*))))
(progn
(depict-html-to-local-file
";JS20;LexerGrammar.html"
"JavaScript 2 Lexer Grammar"
t
#'(lambda (rtf-stream)
(depict-world-commands rtf-stream *lw* :visible-semantics nil))
:external-link-base "notation-semantic.html")
(depict-html-to-local-file
";JS20;LexerSemantics.html"
"JavaScript 2 Lexer Semantics"
t
#'(lambda (rtf-stream)
(depict-world-commands rtf-stream *lw*))
:external-link-base "notation-semantic.html"))
(with-local-output (s ";JS20;LexerGrammar.txt") (print-lexer *ll* s) (print-grammar *lg* s))
(print-illegal-strings m)
|#
(defun js-state-transition (action-results)
(assert-type action-results (tuple t bool))
(values action-results (if (second action-results) '($re) '($non-re))))
(defun js-metaparse (string &key trace)
(lexer-metaparse *ll* string :initial-state '($re) :state-transition #'js-state-transition :trace trace))
(defun js-pmetaparse (string &key (stream t) trace)
(lexer-pmetaparse *ll* string :initial-state '($re) :state-transition #'js-state-transition :stream stream :trace trace))
; Return the JavaScript input string as a list of tokens like:
; (($number . 3.0) + - ++ else ($string . "a+bgde") ($end))
(defun tokenize (string)
(mapcar
#'(lambda (token-value)
(let ((token-value (car token-value)))
(ecase (car token-value)
(identifier (cons '$identifier (cdr token-value)))
((keyword punctuator) (intern (string-upcase (cdr token-value))))
(number (cons '$number (cdr token-value)))
(string (cons '$string (cdr token-value)))
(regular-expression (cons '$regular-expression (cdr token-value)))
(end '($end)))))
(js-metaparse string)))
#|
(lexer-pparse *ll* "0x20")
(lexer-pparse *ll* "2b")
(lexer-pparse *ll* " 3.75" :trace t)
(lexer-pparse *ll* "25" :trace :code)
(js-pmetaparse "32+abc//23e-a4*7e-2 3 id4 4ef;")
(js-pmetaparse "32+abc//23e-a4*7e-2 3 id4 4ef;
")
(js-pmetaparse "32+abc/ /23e-a4*7e-2 3 /*id4 4*-/ef;
fjds*/y//z")
(js-pmetaparse "3a+in'a+b\\147\"de'\"'\"")
(js-pmetaparse "3*/regexp*///x")
(js-pmetaparse "/regexp*///x")
(js-pmetaparse "if \\x69f \\u0069f")
(js-pmetaparse "if \\x69f z\\x20z")
(js-pmetaparse "3lbs 3in 3 in 3_in 3_lbs")
(js-pmetaparse "3a+in'a+b\\040\\077\\700\\150\\15A\\69\"de'\"'\"")
|#
(length (grammar-states *lg*))