1999-05-11 00:52:58 +04:00
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;;; 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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(progn
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(defparameter *rw*
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(generate-world
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"R"
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'((lexer regexp-lexer
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:lr-1
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:regular-expression-pattern
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1999-05-17 09:11:19 +04:00
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((:unicode-character (% every (:text "Any Unicode character")) () t)
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(:unicode-alphanumeric
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(% alphanumeric (:text "Any Unicode alphabetic or decimal digit character (includes ASCII "
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(:character-literal #\0) :nbhy (:character-literal #\9) ", "
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(:character-literal #\A) :nbhy (:character-literal #\Z) ", and "
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(:character-literal #\a) :nbhy (:character-literal #\z) ")"))
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() t)
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(:line-terminator (#?000A #?000D #?2028 #?2029) () t)
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(:non-terminator (- :unicode-character :line-terminator) () t)
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1999-05-11 00:52:58 +04:00
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(:decimal-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9)
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1999-05-17 09:11:19 +04:00
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(($default-action $default-action)
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(digit-value digit-value)))
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1999-05-11 00:52:58 +04:00
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(:octal-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7)
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1999-05-17 09:11:19 +04:00
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(($default-action $default-action)
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(digit-value digit-value)))
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1999-05-11 00:52:58 +04:00
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(:zero-to-three (#\0 #\1 #\2 #\3)
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1999-05-17 09:11:19 +04:00
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((digit-value digit-value)))
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(:four-to-nine (#\4 #\5 #\6 #\7 #\8 #\9)
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((digit-value digit-value)))
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(:eight-or-nine (#\8 #\9)
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((digit-value digit-value)))
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1999-05-11 00:52:58 +04:00
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(:hex-digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 #\A #\B #\C #\D #\E #\F #\a #\b #\c #\d #\e #\f)
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((hex-value digit-value)))
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1999-05-17 09:11:19 +04:00
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(:control-letter (++ (#\A #\B #\C #\D #\E #\F #\G #\H #\I #\J #\K #\L #\M #\N #\O #\P #\Q #\R #\S #\T #\U #\V #\W #\X #\Y #\Z)
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(#\a #\b #\c #\d #\e #\f #\g #\h #\i #\j #\k #\l #\m #\n #\o #\p #\q #\r #\s #\t #\u #\v #\w #\x #\y #\z))
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(($default-action $default-action)))
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((:pattern-character normal) (- :non-terminator (#\^ #\$ #\\ #\. #\* #\+ #\? #\( #\) #\[ #\] #\{ #\} #\|))
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(($default-action $default-action)))
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((:pattern-character non-decimal-digit) (- (:pattern-character normal) :decimal-digit)
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(($default-action $default-action)))
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((:pattern-character non-octal-digit) (- (:pattern-character normal) :octal-digit)
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(($default-action $default-action)))
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((:range-character any normal) (- :non-terminator (#\\ #\]))
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(($default-action $default-action)))
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((:range-character any non-decimal-digit) (- (:range-character any normal) :decimal-digit)
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(($default-action $default-action)))
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((:range-character any non-octal-digit) (- (:range-character any normal) :octal-digit)
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(($default-action $default-action)))
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((:range-character no-caret normal) (- (:range-character any normal) (#\^))
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(($default-action $default-action)))
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((:range-character no-dash normal) (- (:range-character any normal) (#\-))
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(($default-action $default-action)))
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((:range-character no-dash non-decimal-digit) (- (:range-character no-dash normal) :decimal-digit)
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(($default-action $default-action)))
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((:range-character no-dash non-octal-digit) (- (:range-character no-dash normal) :octal-digit)
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(($default-action $default-action)))
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(:identity-escape (- :non-terminator :unicode-alphanumeric)
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(($default-action $default-action))))
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(($default-action character identity (*))
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1999-05-11 00:52:58 +04:00
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(digit-value integer digit-char-16 ((:global-variable "digitValue") "(" * ")"))))
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1999-05-17 09:11:19 +04:00
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(%section "Unicode Character Classes")
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(%charclass :unicode-character)
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(%charclass :unicode-alphanumeric)
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(%charclass :line-terminator)
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(%charclass :non-terminator)
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(define line-terminators (set character) (set-of character #?000A #?000D #?2028 #?2029))
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(define non-terminators (set character) (character-set-difference (set-of-ranges character #?0000 #?FFFF) line-terminators))
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(define re-whitespaces (set character) (set-of character #?000C #?000A #?000D #?0009 #?000B #\space))
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(define re-digits (set character) (set-of-ranges character #\0 #\9))
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(define re-word-characters (set character) (set-of-ranges character #\0 #\9 #\A #\Z #\a #\z #\_ nil))
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(%print-actions)
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(%section "Regular Expression Definitions")
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(deftype r-e-input (tuple (str string) (ignore-case boolean) (multiline boolean)))
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(%text :semantics
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"Field " (:field str r-e-input) " is the input string. "
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(:field ignore-case r-e-input) " and " (:field multiline r-e-input) " are the corresponding regular expression flags.")
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(deftype r-e-result (oneof (success r-e-match) failure))
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(deftype r-e-match (tuple (end-index integer)
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(captured (vector capture))))
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(%text :semantics
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"A " (:type r-e-match) " holds an intermediate state during the pattern-matching process. "
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(:field end-index r-e-match)
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" is the index of the next input character to be matched by the next component in a regular expression pattern. "
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"If we are at the end of the pattern, " (:field end-index r-e-match)
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" is one plus the index of the last matched input character. "
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(:field captured r-e-match)
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" is a zero-based array of the strings captured so far by capturing parentheses.")
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(deftype capture (oneof (present string)
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absent))
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(deftype continuation (-> (r-e-match) r-e-result))
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(%text :semantics
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"A " (:type continuation)
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" is a function that attempts to match the remaining portion of the pattern against the input string, "
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"starting at the intermediate state given by its " (:type r-e-match) " argument. "
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"If a match is possible, it returns a " (:field success r-e-result) " result that contains the final "
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(:type r-e-match) " state; if no match is possible, it returns a " (:field failure r-e-result) " result.")
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(deftype matcher (-> (r-e-input r-e-match integer continuation) r-e-result))
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(%text :semantics
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"A " (:type matcher)
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" is a function that attempts to match a middle portion of the pattern against the input string, "
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"starting at the intermediate state given by its " (:type r-e-match) " argument. "
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"Since the remainder of the pattern heavily influences whether (and how) a middle portion will match, we "
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"must pass in a " (:type continuation) " function that checks whether the rest of the pattern matched. "
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"If the continuation returns " (:field failure r-e-result) ", the matcher function may call it repeatedly, "
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"trying various alternatives at pattern choice points.")
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(%text :semantics
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"The " (:type r-e-input) " parameter contains the input string and is merely passed down to subroutines. "
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"The " (:type integer) " parameter contains the number of capturing left parentheses seen so far in the "
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"pattern and is used to assign static, consecutive numbers to capturing parentheses.")
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(define (sequence-matcher (matcher1 matcher) (paren-count1 integer) (matcher2 matcher)) matcher
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(function ((t r-e-input) (x r-e-match) (p integer) (c continuation))
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(let ((d continuation (function ((y r-e-match))
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(matcher2 t y (+ p paren-count1) c))))
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(matcher1 t x p d))))
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(%text :semantics
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(:global sequence-matcher) " returns a " (:type matcher)
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" that matches the concatenation of the patterns matched by "
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(:local matcher1) " and " (:local matcher2) ". "
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(:local paren-count1) " is the number of capturing left parentheses inside "
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(:local matcher2) "'s pattern.")
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(define (character-set-matcher (acceptance-set (set character))) matcher ;*********ignore case?
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(function ((t r-e-input) (x r-e-match) (p integer :unused) (c continuation))
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(let ((i integer (& end-index x))
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(s string (& str t)))
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(if (= i (length s))
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(oneof failure)
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(if (character-set-member (nth s i) acceptance-set)
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(c (tuple r-e-match (+ i 1) (& captured x)))
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(oneof failure))))))
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(%text :semantics
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(:global character-set-matcher) " returns a " (:type matcher)
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" that matches a single input string character. The match succeeds if the character is a member of the "
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(:local acceptance-set) " set of characters (possibly ignoring case).")
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(define (character-matcher (ch character)) matcher
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(character-set-matcher (set-of character ch)))
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(%text :semantics
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(:global character-matcher) " returns a " (:type matcher)
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" that matches a single input string character. The match succeeds if the character is the same as "
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(:local ch) " (possibly ignoring case).")
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(%print-actions)
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1999-05-11 00:52:58 +04:00
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(%section "Regular Expression Patterns")
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1999-05-17 09:11:19 +04:00
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(rule :regular-expression-pattern ((exec (-> (r-e-input integer) r-e-result)))
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(production :regular-expression-pattern (:disjunction) regular-expression-pattern-disjunction
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((exec (t r-e-input) (index integer))
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((match :disjunction)
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t
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(tuple r-e-match index (fill-capture (count-parens :disjunction)))
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0
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(function ((x r-e-match)) (oneof success x))))))
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(%print-actions)
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(define (fill-capture (i integer)) (vector capture)
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(if (= i 0)
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(vector-of capture)
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(append (fill-capture (- i 1)) (vector (oneof absent)))))
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(%subsection "Disjunctions")
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(rule :disjunction ((match matcher) (count-parens integer))
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(production :disjunction ((:alternative normal)) disjunction-one
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(match (match :alternative))
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(count-parens (count-parens :alternative)))
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(production :disjunction ((:alternative normal) #\| :disjunction) disjunction-more
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((match (t r-e-input) (x r-e-match) (p integer) (c continuation))
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(case ((match :alternative) t x p c)
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((success y r-e-match) (oneof success y))
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(failure ((match :disjunction) t x (+ p (count-parens :alternative)) c))))
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(count-parens (+ (count-parens :alternative) (count-parens :disjunction)))))
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(%print-actions)
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(%subsection "Quantifiers")
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(grammar-argument :lambda normal non-decimal-digit non-octal-digit)
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(rule (:alternative :lambda) ((match matcher) (count-parens integer))
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(production (:alternative :lambda) () alternative-none
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((match (t r-e-input :unused) (x r-e-match) (p integer :unused) (c continuation))
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(c x))
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(count-parens 0))
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(production (:alternative :lambda) (:assertion (:alternative normal)) alternative-assertion
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((match (t r-e-input) (x r-e-match) (p integer) (c continuation))
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(if ((test-assertion :assertion) t x)
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((match :alternative) t x p c)
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(oneof failure)))
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(count-parens (count-parens :alternative)))
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(production (:alternative :lambda) ((:ordinary-atom :lambda) (:alternative normal)) alternative-ordinary-atom
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(match (sequence-matcher (match :ordinary-atom) (count-parens :ordinary-atom) (match :alternative)))
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(count-parens (+ (count-parens :ordinary-atom) (count-parens :alternative))))
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(production (:alternative :lambda) (:one-digit-escape (:alternative non-decimal-digit)) alternative-one-digit-escape
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(match (sequence-matcher (match :one-digit-escape) 0 (match :alternative)))
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(count-parens (count-parens :alternative)))
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(production (:alternative :lambda) (:short-octal-escape (:alternative non-octal-digit)) alternative-short-octal-escape
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(match (sequence-matcher (match :short-octal-escape) 0 (match :alternative)))
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(count-parens (count-parens :alternative)))
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(production (:alternative :lambda) ((:atom :lambda) :quantifier (:alternative normal)) alternative-quantified-atom
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(match
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(let ((min integer (minimum :quantifier))
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(max limit (maximum :quantifier))
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(lazy boolean (lazy :quantifier)))
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(if (case max
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((finite m integer) (< m min))
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(infinite false))
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(bottom matcher)
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(let ((looper matcher (repeat-matcher (match :atom) min max lazy (count-parens :atom))))
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(sequence-matcher looper (count-parens :atom) (match :alternative))))))
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(count-parens (+ (count-parens :atom) (count-parens :alternative)))))
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(rule :quantifier ((minimum integer) (maximum limit) (lazy boolean))
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(production :quantifier (:quantifier-prefix) quantifier-eager
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(minimum (minimum :quantifier-prefix))
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(maximum (maximum :quantifier-prefix))
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(lazy false))
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(production :quantifier (:quantifier-prefix #\?) quantifier-lazy
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(minimum (minimum :quantifier-prefix))
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(maximum (maximum :quantifier-prefix))
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(lazy true)))
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(rule :quantifier-prefix ((minimum integer) (maximum limit))
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(production :quantifier-prefix (#\*) quantifier-prefix-zero-or-more
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(minimum 0)
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(maximum (oneof infinite)))
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(production :quantifier-prefix (#\+) quantifier-prefix-one-or-more
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|
|
|
|
(minimum 1)
|
|
|
|
|
(maximum (oneof infinite)))
|
|
|
|
|
(production :quantifier-prefix (#\?) quantifier-prefix-zero-or-one
|
|
|
|
|
(minimum 0)
|
|
|
|
|
(maximum (oneof finite 1)))
|
|
|
|
|
(production :quantifier-prefix (#\{ :decimal-digits #\}) quantifier-prefix-repeat
|
|
|
|
|
(minimum (integer-value :decimal-digits))
|
|
|
|
|
(maximum (oneof finite (integer-value :decimal-digits))))
|
|
|
|
|
(production :quantifier-prefix (#\{ :decimal-digits #\, #\}) quantifier-prefix-repeat-or-more
|
|
|
|
|
(minimum (integer-value :decimal-digits))
|
|
|
|
|
(maximum (oneof infinite)))
|
|
|
|
|
(production :quantifier-prefix (#\{ :decimal-digits #\, :decimal-digits #\}) quantifier-prefix-repeat-range
|
|
|
|
|
(minimum (integer-value :decimal-digits 1))
|
|
|
|
|
(maximum (oneof finite (integer-value :decimal-digits 2)))))
|
|
|
|
|
|
|
|
|
|
(rule :decimal-digits ((integer-value integer))
|
|
|
|
|
(production :decimal-digits (:decimal-digit) decimal-digits-first
|
|
|
|
|
(integer-value (digit-value :decimal-digit)))
|
|
|
|
|
(production :decimal-digits (:decimal-digits :decimal-digit) decimal-digits-rest
|
|
|
|
|
(integer-value (+ (* 10 (integer-value :decimal-digits)) (digit-value :decimal-digit)))))
|
1999-05-11 00:52:58 +04:00
|
|
|
(%charclass :decimal-digit)
|
|
|
|
|
|
|
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(deftype limit (oneof (finite integer) infinite))
|
|
|
|
|
|
|
|
|
|
(define (reset-parens (x r-e-match) (p integer) (n-parens integer)) r-e-match
|
|
|
|
|
(if (= n-parens 0)
|
|
|
|
|
x
|
|
|
|
|
(let ((y r-e-match (tuple r-e-match (& end-index x)
|
|
|
|
|
(set-nth (& captured x) p (oneof absent)))))
|
|
|
|
|
(reset-parens y (+ p 1) (- n-parens 1)))))
|
1999-05-11 00:52:58 +04:00
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(define (repeat-matcher (body matcher) (min integer) (max limit) (lazy boolean) (n-body-parens integer)) matcher
|
|
|
|
|
(function ((t r-e-input) (x r-e-match) (p integer) (c continuation))
|
|
|
|
|
(if (case max
|
|
|
|
|
((finite m integer) (= m 0))
|
|
|
|
|
(infinite false))
|
|
|
|
|
(c x)
|
|
|
|
|
(let ((d continuation (function ((y r-e-match))
|
|
|
|
|
(if (and (= min 0)
|
|
|
|
|
(and (is infinite max)
|
|
|
|
|
(= (& end-index y) (& end-index x))))
|
|
|
|
|
(oneof failure)
|
|
|
|
|
(let ((new-min integer (if (= min 0) 0 (- min 1)))
|
|
|
|
|
(new-max limit (case max
|
|
|
|
|
((finite m integer) (oneof finite (- m 1)))
|
|
|
|
|
(infinite (oneof infinite)))))
|
|
|
|
|
((repeat-matcher body new-min new-max lazy n-body-parens) t y p c)))))
|
|
|
|
|
(xr r-e-match (reset-parens x p n-body-parens)))
|
|
|
|
|
(if (/= min 0)
|
|
|
|
|
(body t xr p d)
|
|
|
|
|
(if lazy
|
|
|
|
|
(case (c x)
|
|
|
|
|
((success z r-e-match) (oneof success z))
|
|
|
|
|
(failure (body t xr p d)))
|
|
|
|
|
(case (body t xr p d)
|
|
|
|
|
((success z r-e-match) (oneof success z))
|
|
|
|
|
(failure (c x)))))))))
|
1999-05-11 00:52:58 +04:00
|
|
|
|
|
|
|
|
(%print-actions)
|
|
|
|
|
|
|
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(%subsection "Assertions")
|
1999-05-11 00:52:58 +04:00
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(rule :assertion ((test-assertion (-> (r-e-input r-e-match) boolean)))
|
|
|
|
|
(production :assertion (#\^) assertion-beginning
|
|
|
|
|
((test-assertion (t r-e-input :unused) (x r-e-match))
|
|
|
|
|
(= (& end-index x) 0))) ;*********multiline
|
|
|
|
|
(production :assertion (#\$) assertion-end
|
|
|
|
|
((test-assertion (t r-e-input) (x r-e-match))
|
|
|
|
|
(= (& end-index x) (length (& str t))))) ;*********multiline
|
|
|
|
|
(production :assertion (#\\ #\b) assertion-word-boundary
|
|
|
|
|
((test-assertion (t r-e-input) (x r-e-match))
|
|
|
|
|
(at-word-boundary (& end-index x) (& str t))))
|
|
|
|
|
(production :assertion (#\\ #\B) assertion-non-word-boundary
|
|
|
|
|
((test-assertion (t r-e-input) (x r-e-match))
|
|
|
|
|
(not (at-word-boundary (& end-index x) (& str t))))))
|
1999-05-11 00:52:58 +04:00
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(%print-actions)
|
1999-05-11 00:52:58 +04:00
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(define (at-word-boundary (i integer) (s string)) boolean
|
|
|
|
|
(or (= i 0)
|
|
|
|
|
(or (= i (length s))
|
|
|
|
|
(xor (character-set-member (nth s (- i 1)) re-word-characters)
|
|
|
|
|
(character-set-member (nth s i) re-word-characters)))))
|
1999-05-11 00:52:58 +04:00
|
|
|
|
|
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(%section "Atoms")
|
|
|
|
|
|
|
|
|
|
(rule (:atom :lambda) ((match matcher) (count-parens integer))
|
|
|
|
|
(production (:atom :lambda) ((:ordinary-atom :lambda)) atom-ordinary-atom
|
|
|
|
|
(match (match :ordinary-atom))
|
|
|
|
|
(count-parens (count-parens :ordinary-atom)))
|
|
|
|
|
(production (:atom :lambda) (:one-digit-escape) atom-one-digit-escape
|
|
|
|
|
(match (match :one-digit-escape))
|
|
|
|
|
(count-parens 0))
|
|
|
|
|
(production (:atom :lambda) (:short-octal-escape) atom-short-octal-escape
|
|
|
|
|
(match (match :short-octal-escape))
|
|
|
|
|
(count-parens 0)))
|
|
|
|
|
|
|
|
|
|
(rule (:ordinary-atom :lambda) ((match matcher) (count-parens integer))
|
|
|
|
|
(production (:ordinary-atom :lambda) (:compound-atom) atom-compound-atom
|
|
|
|
|
(match (match :compound-atom))
|
|
|
|
|
(count-parens (count-parens :compound-atom)))
|
|
|
|
|
(production (:ordinary-atom :lambda) ((:pattern-character :lambda)) atom-pattern-character
|
|
|
|
|
(match (character-matcher ($default-action :pattern-character)))
|
|
|
|
|
(count-parens 0)))
|
|
|
|
|
|
|
|
|
|
(%charclass (:pattern-character normal))
|
|
|
|
|
(%charclass (:pattern-character non-decimal-digit))
|
|
|
|
|
(%charclass (:pattern-character non-octal-digit))
|
|
|
|
|
|
|
|
|
|
(rule :compound-atom ((match matcher) (count-parens integer))
|
|
|
|
|
(production :compound-atom (#\( :disjunction #\)) compound-atom-parentheses
|
|
|
|
|
((match (t r-e-input) (x r-e-match) (p integer) (c continuation))
|
|
|
|
|
(let ((d continuation
|
|
|
|
|
(function ((y r-e-match))
|
|
|
|
|
(let ((updated-captured (vector capture)
|
|
|
|
|
(set-nth (& captured y) p (oneof present (subseq (& str t) (& end-index x) (- (& end-index y) 1))))))
|
|
|
|
|
(c (tuple r-e-match (& end-index y) updated-captured))))))
|
|
|
|
|
((match :disjunction) t x (+ p 1) d)))
|
|
|
|
|
(count-parens (+ (count-parens :disjunction) 1)))
|
|
|
|
|
(production :compound-atom (#\( #\? #\: :disjunction #\)) compound-atom-non-capturing-parentheses
|
|
|
|
|
(match (match :disjunction))
|
|
|
|
|
(count-parens (count-parens :disjunction)))
|
|
|
|
|
(production :compound-atom (#\.) compound-atom-dot
|
|
|
|
|
(match (character-set-matcher non-terminators)) ;******** Check it
|
|
|
|
|
(count-parens 0))
|
|
|
|
|
(production :compound-atom (:character-class) compound-atom-character-class
|
|
|
|
|
((match (t r-e-input) (x r-e-match) (p integer) (c continuation))
|
|
|
|
|
(let ((a (set character) ((acceptance-set :character-class) (length (& captured x)))))
|
|
|
|
|
((character-set-matcher a) t x p c)))
|
|
|
|
|
(count-parens 0))
|
|
|
|
|
(production :compound-atom (:character-escape) compound-atom-character-escape
|
|
|
|
|
(match (character-matcher (character-value :character-escape)))
|
|
|
|
|
(count-parens 0))
|
|
|
|
|
(production :compound-atom (:two-digit-escape) compound-atom-two-digit-escape
|
|
|
|
|
(match (match :two-digit-escape))
|
|
|
|
|
(count-parens 0))
|
|
|
|
|
(production :compound-atom (:character-class-escape) compound-atom-character-class-escape
|
|
|
|
|
(match (character-set-matcher (acceptance-set :character-class-escape)))
|
|
|
|
|
(count-parens 0)))
|
|
|
|
|
(%print-actions)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(%section "Escapes")
|
|
|
|
|
|
|
|
|
|
(rule :character-escape ((character-value character))
|
|
|
|
|
(production :character-escape (:control-escape) character-escape-control
|
|
|
|
|
(character-value (character-value :control-escape)))
|
|
|
|
|
(production :character-escape (#\\ #\c :control-letter) character-escape-control-letter
|
|
|
|
|
(character-value (code-to-character (bitwise-and (character-to-code ($default-action :control-letter)) 31))))
|
|
|
|
|
(production :character-escape (:three-digit-escape) character-escape-three-digit
|
|
|
|
|
(character-value (character-value :three-digit-escape)))
|
|
|
|
|
(production :character-escape (:hex-escape) character-escape-hex
|
|
|
|
|
(character-value (character-value :hex-escape)))
|
|
|
|
|
(production :character-escape (#\\ :identity-escape) character-escape-non-escape
|
|
|
|
|
(character-value ($default-action :identity-escape))))
|
|
|
|
|
|
|
|
|
|
(%charclass :control-letter)
|
|
|
|
|
(%charclass :identity-escape)
|
|
|
|
|
|
|
|
|
|
(rule :control-escape ((character-value character))
|
|
|
|
|
(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)
|
|
|
|
|
|
|
|
|
|
(%subsection "Numeric Escapes")
|
|
|
|
|
|
|
|
|
|
(rule :one-digit-escape ((match matcher))
|
|
|
|
|
(production :one-digit-escape (#\\ :decimal-digit) one-digit-escape-1
|
|
|
|
|
(match
|
|
|
|
|
(let ((n integer (digit-value :decimal-digit)))
|
|
|
|
|
(if (= n 0)
|
|
|
|
|
(character-matcher #?0000)
|
|
|
|
|
(backreference-matcher n))))))
|
|
|
|
|
|
|
|
|
|
(rule :short-octal-escape ((character-value (-> (integer) character)) (match matcher))
|
|
|
|
|
(production :short-octal-escape (#\\ :zero-to-three :octal-digit) short-octal-escape-2
|
|
|
|
|
((character-value (n-capturing-parens integer))
|
|
|
|
|
(let ((n integer (+ (* 10 (digit-value :zero-to-three)) (digit-value :octal-digit))))
|
|
|
|
|
(if (and (>= n 10) (<= n n-capturing-parens))
|
|
|
|
|
(bottom character)
|
|
|
|
|
(code-to-character (+ (* 8 (digit-value :zero-to-three)) (digit-value :octal-digit))))))
|
|
|
|
|
((match (t r-e-input) (x r-e-match) (p integer) (c continuation))
|
|
|
|
|
(let ((n integer (+ (* 10 (digit-value :zero-to-three)) (digit-value :octal-digit))))
|
|
|
|
|
(if (and (>= n 10) (<= n (length (& captured x))))
|
|
|
|
|
((backreference-matcher n) t x p c)
|
|
|
|
|
((character-matcher (code-to-character (+ (* 8 (digit-value :zero-to-three)) (digit-value :octal-digit))))
|
|
|
|
|
t x p c))))))
|
|
|
|
|
|
|
|
|
|
(rule :two-digit-escape ((match matcher))
|
|
|
|
|
(production :two-digit-escape (#\\ :zero-to-three :eight-or-nine) two-digit-escape-under-40
|
|
|
|
|
(match (backreference-matcher (+ (* 10 (digit-value :zero-to-three)) (digit-value :eight-or-nine)))))
|
|
|
|
|
(production :two-digit-escape (#\\ :four-to-nine :decimal-digit) two-digit-escape-over-40
|
|
|
|
|
(match (backreference-matcher (+ (* 10 (digit-value :four-to-nine)) (digit-value :decimal-digit))))))
|
|
|
|
|
|
|
|
|
|
(rule :three-digit-escape ((character-value character))
|
|
|
|
|
(production :three-digit-escape (#\\ :zero-to-three :octal-digit :octal-digit) three-digit-escape-3
|
|
|
|
|
(character-value (code-to-character (+ (+ (* 64 (digit-value :zero-to-three))
|
|
|
|
|
(* 8 (digit-value :octal-digit 1)))
|
|
|
|
|
(digit-value :octal-digit 2))))))
|
|
|
|
|
(%charclass :zero-to-three)
|
|
|
|
|
(%charclass :four-to-nine)
|
|
|
|
|
(%charclass :octal-digit)
|
|
|
|
|
(%charclass :eight-or-nine)
|
|
|
|
|
|
|
|
|
|
(define (backreference-matcher (n integer)) matcher
|
|
|
|
|
(function ((t r-e-input) (x r-e-match) (p integer :unused) (c continuation))
|
|
|
|
|
(case (nth-backreference x n)
|
|
|
|
|
((present ref string)
|
|
|
|
|
(let ((i integer (& end-index x))
|
|
|
|
|
(s string (& str t)))
|
|
|
|
|
(let ((j integer (+ i (length ref))))
|
|
|
|
|
(if (> j (length s))
|
|
|
|
|
(oneof failure)
|
|
|
|
|
(if (string-equal (subseq s i (- j 1)) ref) ;*********ignore case?
|
|
|
|
|
(c (tuple r-e-match j (& captured x)))
|
|
|
|
|
(oneof failure))))))
|
|
|
|
|
(absent (oneof failure)))))
|
|
|
|
|
|
|
|
|
|
(define (nth-backreference (x r-e-match) (n integer)) capture
|
|
|
|
|
(if (and (> n 0) (<= n (length (& captured x))))
|
|
|
|
|
(nth (& captured x) (- n 1))
|
|
|
|
|
(bottom capture)))
|
|
|
|
|
(%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))))))
|
|
|
|
|
(%charclass :hex-digit)
|
|
|
|
|
(%print-actions)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(%subsection "Character Class Escapes")
|
|
|
|
|
|
|
|
|
|
(rule :character-class-escape ((acceptance-set (set character)))
|
|
|
|
|
(production :character-class-escape (#\\ #\s) character-class-escape-whitespace
|
|
|
|
|
(acceptance-set re-whitespaces))
|
|
|
|
|
(production :character-class-escape (#\\ #\S) character-class-escape-non-whitespace
|
|
|
|
|
(acceptance-set (character-set-difference (set-of-ranges character #?0000 #?FFFF) re-whitespaces)))
|
|
|
|
|
(production :character-class-escape (#\\ #\d) character-class-escape-digit
|
|
|
|
|
(acceptance-set re-digits))
|
|
|
|
|
(production :character-class-escape (#\\ #\D) character-class-escape-non-digit
|
|
|
|
|
(acceptance-set (character-set-difference (set-of-ranges character #?0000 #?FFFF) re-digits)))
|
|
|
|
|
(production :character-class-escape (#\\ #\w) character-class-escape-word
|
|
|
|
|
(acceptance-set re-word-characters))
|
|
|
|
|
(production :character-class-escape (#\\ #\W) character-class-escape-non-word
|
|
|
|
|
(acceptance-set (character-set-difference (set-of-ranges character #?0000 #?FFFF) re-word-characters))))
|
|
|
|
|
(%print-actions)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(%section "User-Specified Character Classes")
|
|
|
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|
|
|
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|
(grammar-argument :sigma any no-caret no-dash)
|
|
|
|
|
|
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|
|
|
(rule :character-class ((acceptance-set (-> (integer) (set character))))
|
|
|
|
|
(production :character-class (#\[ (:class-ranges no-caret) #\]) character-class-positive
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
((acceptance-set :class-ranges) n-capturing-parens)))
|
|
|
|
|
(production :character-class (#\[ #\^ (:class-ranges any) #\]) character-class-negative
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
(character-set-difference (set-of-ranges character #?0000 #?FFFF) ((acceptance-set :class-ranges) n-capturing-parens)))))
|
|
|
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|
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|
|
(exclude (:class-ranges no-dash))
|
|
|
|
|
(rule (:class-ranges :sigma) ((acceptance-set (-> (integer) (set character))))
|
|
|
|
|
(production (:class-ranges :sigma) () class-ranges-none
|
|
|
|
|
((acceptance-set (n-capturing-parens integer :unused))
|
|
|
|
|
(set-of character)))
|
|
|
|
|
(production (:class-ranges :sigma) ((:range-list :sigma normal)) class-ranges-some
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
((acceptance-set :range-list) n-capturing-parens))))
|
|
|
|
|
|
|
|
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|
(exclude (:range-list no-caret non-decimal-digit))
|
|
|
|
|
(exclude (:range-list no-caret non-octal-digit))
|
|
|
|
|
(rule (:range-list :sigma :lambda) ((acceptance-set (-> (integer) (set character))))
|
|
|
|
|
(production (:range-list :sigma :lambda) ((:final-range-atom :sigma :lambda)) range-list-final-range-atom
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
((acceptance-set :final-range-atom) n-capturing-parens)))
|
|
|
|
|
(production (:range-list :sigma :lambda) ((:ordinary-range-atom :sigma :lambda) (:range-list-suffix normal)) range-list-ordinary-range-atom
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
(let ((a (set character) (acceptance-set :ordinary-range-atom)))
|
|
|
|
|
((acceptance-set :range-list-suffix) n-capturing-parens a))))
|
|
|
|
|
(production (:range-list :sigma :lambda) (:zero-escape (:range-list-suffix non-decimal-digit)) range-list-zero-escape
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
(let ((a (set character) (set-of character (character-value :zero-escape))))
|
|
|
|
|
((acceptance-set :range-list-suffix) n-capturing-parens a))))
|
|
|
|
|
(production (:range-list :sigma :lambda) (:short-octal-escape (:range-list-suffix non-octal-digit)) range-list-short-octal-escape
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
(let ((a (set character) (set-of character ((character-value :short-octal-escape) n-capturing-parens))))
|
|
|
|
|
((acceptance-set :range-list-suffix) n-capturing-parens a)))))
|
|
|
|
|
|
|
|
|
|
(rule (:range-list-suffix :lambda) ((acceptance-set (-> (integer (set character)) (set character))))
|
|
|
|
|
(production (:range-list-suffix :lambda) ((:range-list no-dash :lambda)) range-list-suffix-list
|
|
|
|
|
((acceptance-set (n-capturing-parens integer) (low (set character)))
|
|
|
|
|
(character-set-union low ((acceptance-set :range-list) n-capturing-parens))))
|
|
|
|
|
(production (:range-list-suffix :lambda) (#\- (:range-atom any normal)) range-list-final-range
|
|
|
|
|
((acceptance-set (n-capturing-parens integer) (low (set character)))
|
|
|
|
|
(character-range low ((acceptance-set :range-atom) n-capturing-parens))))
|
|
|
|
|
(production (:range-list-suffix :lambda) (#\- (:ordinary-range-atom any normal) (:range-list any normal)) range-list-suffix-ordinary-range-atom
|
|
|
|
|
((acceptance-set (n-capturing-parens integer) (low (set character)))
|
|
|
|
|
(let ((range (set character) (character-range low (acceptance-set :ordinary-range-atom))))
|
|
|
|
|
(character-set-union range ((acceptance-set :range-list) n-capturing-parens)))))
|
|
|
|
|
(production (:range-list-suffix :lambda) (#\- :zero-escape (:range-list any non-decimal-digit)) range-list-suffix-zero-escape
|
|
|
|
|
((acceptance-set (n-capturing-parens integer) (low (set character)))
|
|
|
|
|
(let ((range (set character) (character-range low (set-of character (character-value :zero-escape)))))
|
|
|
|
|
(character-set-union range ((acceptance-set :range-list) n-capturing-parens)))))
|
|
|
|
|
(production (:range-list-suffix :lambda) (#\- :short-octal-escape (:range-list any non-octal-digit)) range-list-suffix-short-octal-escape
|
|
|
|
|
((acceptance-set (n-capturing-parens integer) (low (set character)))
|
|
|
|
|
(let ((range (set character) (character-range low (set-of character ((character-value :short-octal-escape) n-capturing-parens)))))
|
|
|
|
|
(character-set-union range ((acceptance-set :range-list) n-capturing-parens))))))
|
|
|
|
|
(%print-actions)
|
|
|
|
|
|
|
|
|
|
(define (character-range (low (set character)) (high (set character))) (set character)
|
|
|
|
|
(if (or (/= (character-set-length low) 1) (/= (character-set-length high) 1))
|
|
|
|
|
(bottom (set character))
|
|
|
|
|
(let ((l character (character-set-min low))
|
|
|
|
|
(h character (character-set-min high)))
|
|
|
|
|
(if (char<= l h)
|
|
|
|
|
(set-of-ranges character l h)
|
|
|
|
|
(bottom (set character))))))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(%subsection "Character Class Range Atoms")
|
|
|
|
|
|
|
|
|
|
(exclude (:final-range-atom no-caret non-decimal-digit))
|
|
|
|
|
(exclude (:final-range-atom no-caret non-octal-digit))
|
|
|
|
|
(rule (:final-range-atom :sigma :lambda) ((acceptance-set (-> (integer) (set character))))
|
|
|
|
|
(production (:final-range-atom any :lambda) ((:range-atom any :lambda)) final-range-atom-any
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
((acceptance-set :range-atom) n-capturing-parens)))
|
|
|
|
|
(production (:final-range-atom no-caret :lambda) ((:range-atom no-caret :lambda)) final-range-atom-no-caret
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
((acceptance-set :range-atom) n-capturing-parens)))
|
|
|
|
|
(production (:final-range-atom no-dash :lambda) ((:range-atom any :lambda)) final-range-atom-no-dash
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
((acceptance-set :range-atom) n-capturing-parens))))
|
|
|
|
|
|
|
|
|
|
(exclude (:range-atom no-caret non-decimal-digit))
|
|
|
|
|
(exclude (:range-atom no-caret non-octal-digit))
|
|
|
|
|
(exclude (:range-atom no-dash normal))
|
|
|
|
|
(exclude (:range-atom no-dash non-decimal-digit))
|
|
|
|
|
(exclude (:range-atom no-dash non-octal-digit))
|
|
|
|
|
(rule (:range-atom :sigma :lambda) ((acceptance-set (-> (integer) (set character))))
|
|
|
|
|
(production (:range-atom :sigma :lambda) ((:ordinary-range-atom :sigma :lambda)) range-atom-ordinary
|
|
|
|
|
((acceptance-set (n-capturing-parens integer :unused))
|
|
|
|
|
(acceptance-set :ordinary-range-atom)))
|
|
|
|
|
(production (:range-atom :sigma :lambda) (:zero-escape) range-atom-zero-escape
|
|
|
|
|
((acceptance-set (n-capturing-parens integer :unused))
|
|
|
|
|
(set-of character (character-value :zero-escape))))
|
|
|
|
|
(production (:range-atom :sigma :lambda) (:short-octal-escape) range-atom-short-octal-escape
|
|
|
|
|
((acceptance-set (n-capturing-parens integer))
|
|
|
|
|
(set-of character ((character-value :short-octal-escape) n-capturing-parens)))))
|
|
|
|
|
|
|
|
|
|
(exclude (:ordinary-range-atom no-caret non-decimal-digit))
|
|
|
|
|
(exclude (:ordinary-range-atom no-caret non-octal-digit))
|
|
|
|
|
(rule (:ordinary-range-atom :sigma :lambda) ((acceptance-set (set character)))
|
|
|
|
|
(production (:ordinary-range-atom :sigma :lambda) ((:range-character :sigma :lambda)) ordinary-range-atom-character
|
|
|
|
|
(acceptance-set (set-of character ($default-action :range-character))))
|
|
|
|
|
(production (:ordinary-range-atom :sigma :lambda) (:range-escape) ordinary-range-atom-range-escape
|
|
|
|
|
(acceptance-set (acceptance-set :range-escape))))
|
|
|
|
|
|
|
|
|
|
(%charclass (:range-character any normal))
|
|
|
|
|
(%charclass (:range-character any non-decimal-digit))
|
|
|
|
|
(%charclass (:range-character any non-octal-digit))
|
|
|
|
|
(%charclass (:range-character no-caret normal))
|
|
|
|
|
(%charclass (:range-character no-dash normal))
|
|
|
|
|
(%charclass (:range-character no-dash non-decimal-digit))
|
|
|
|
|
(%charclass (:range-character no-dash non-octal-digit))
|
|
|
|
|
|
|
|
|
|
(rule :range-escape ((acceptance-set (set character)))
|
|
|
|
|
(production :range-escape (#\\ #\b) range-escape-backspace
|
|
|
|
|
(acceptance-set (set-of character #?0008)))
|
|
|
|
|
(production :range-escape (:character-escape) range-escape-character-escape
|
|
|
|
|
(acceptance-set (set-of character (character-value :character-escape))))
|
|
|
|
|
(production :range-escape (:character-class-escape) range-escape-character-class-escape
|
|
|
|
|
(acceptance-set (acceptance-set :character-class-escape))))
|
|
|
|
|
|
|
|
|
|
(rule :zero-escape ((character-value character))
|
|
|
|
|
(production :zero-escape (#\\ #\0) zero-escape-0
|
|
|
|
|
(character-value #?0000)))
|
|
|
|
|
(%print-actions)
|
1999-05-11 00:52:58 +04:00
|
|
|
)))
|
|
|
|
|
|
|
|
|
|
(defparameter *rl* (world-lexer *rw* 'regexp-lexer))
|
1999-05-17 09:11:19 +04:00
|
|
|
(defparameter *rg* (lexer-grammar *rl*)))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(defun run-regexp (regexp input &optional ignore-case multiline)
|
|
|
|
|
(let ((exec (first (lexer-parse *rl* regexp))))
|
|
|
|
|
(dotimes (i (length input) '(failure))
|
|
|
|
|
(let ((result (funcall exec (list input ignore-case multiline) i)))
|
|
|
|
|
(ecase (first result)
|
|
|
|
|
(success
|
|
|
|
|
(return (list* i (subseq input i (second result)) (cddr result))))
|
|
|
|
|
(failure))))))
|
1999-05-11 00:52:58 +04:00
|
|
|
|
|
|
|
|
#|
|
1999-05-17 09:11:19 +04:00
|
|
|
(progn
|
|
|
|
|
(depict-rtf-to-local-file
|
|
|
|
|
";JS20;RegExpGrammar.rtf"
|
|
|
|
|
"Regular Expression Grammar"
|
|
|
|
|
#'(lambda (rtf-stream)
|
|
|
|
|
(depict-world-commands rtf-stream *rw* :visible-semantics nil)))
|
|
|
|
|
(depict-rtf-to-local-file
|
|
|
|
|
";JS20;RegExpSemantics.rtf"
|
|
|
|
|
"Regular Expression Semantics"
|
|
|
|
|
#'(lambda (rtf-stream)
|
|
|
|
|
(depict-world-commands rtf-stream *rw*))))
|
1999-05-11 00:52:58 +04:00
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(progn
|
|
|
|
|
(depict-html-to-local-file
|
|
|
|
|
";JS20;RegExpGrammar.html"
|
|
|
|
|
"Regular Expression Grammar"
|
|
|
|
|
t
|
|
|
|
|
#'(lambda (html-stream)
|
|
|
|
|
(depict-world-commands html-stream *rw* :visible-semantics nil)))
|
|
|
|
|
(depict-html-to-local-file
|
|
|
|
|
";JS20;RegExpSemantics.html"
|
|
|
|
|
"Regular Expression Semantics"
|
|
|
|
|
t
|
|
|
|
|
#'(lambda (html-stream)
|
|
|
|
|
(depict-world-commands html-stream *rw*))))
|
1999-05-11 00:52:58 +04:00
|
|
|
|
|
|
|
|
(with-local-output (s ";JS20;RegExpGrammar.txt") (print-lexer *rl* s) (print-grammar *rg* s))
|
|
|
|
|
|
1999-05-17 09:11:19 +04:00
|
|
|
(lexer-pparse *rl* "a+" :trace t)
|
|
|
|
|
(lexer-pparse *rl* "[]+" :trace t)
|
|
|
|
|
(run-regexp "(0x|0)2" "0x20")
|
|
|
|
|
(run-regexp "(a*)b\\1+c" "aabaaaac")
|
|
|
|
|
(run-regexp "(a*)b\\1+" "baaaac")
|
|
|
|
|
(run-regexp "b(a+)(a+)?(a+)c" "baaaac")
|
|
|
|
|
(run-regexp "(((a+)?(b+)?c)*)" "aacbbbcac")
|
|
|
|
|
(run-regexp "(\\s\\S\\s)" "aac xa d fds fds sac")
|
|
|
|
|
(run-regexp "(\\s)" "aac xa deac")
|
|
|
|
|
(run-regexp "[01234]+aa+" "93-43aabbc")
|
|
|
|
|
(run-regexp "[\\101A-ae-]+" "93ABC-@ezy43abc")
|
|
|
|
|
(run-regexp "b[ace]+" "baaaacecfe")
|
|
|
|
|
(run-regexp "b[^a]+" "baaaabc")
|
|
|
|
|
|
1999-05-11 00:52:58 +04:00
|
|
|
|#
|
|
|
|
|
|
