1 ! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors combinators kernel math sequences strings sets
4 assocs prettyprint.backend prettyprint.custom make lexer
5 namespaces parser arrays fry locals regexp.minimize
6 regexp.parser regexp.nfa regexp.dfa regexp.traversal
7 regexp.transition-tables splitting sorting regexp.ast
8 regexp.negation regexp.matchers regexp.compiler ;
13 { parse-tree read-only }
15 dfa reverse-dfa dfa-quot ;
17 : make-regexp ( string ast -- regexp )
18 f f <options> f f f regexp boa ; foldable
19 ! Foldable because, when the dfa slot is set,
20 ! it'll be set to the same thing regardless of who sets it
22 : <optioned-regexp> ( string options -- regexp )
23 [ dup parse-regexp ] [ string>options ] bi*
26 : <regexp> ( string -- regexp ) "" <optioned-regexp> ;
28 TUPLE: reverse-matcher regexp ;
29 C: <reverse-matcher> reverse-matcher
33 : get-ast ( regexp -- ast )
34 [ parse-tree>> ] [ options>> ] bi <with-options> ;
36 : compile-regexp ( regexp -- regexp )
37 dup '[ [ _ get-ast ast>dfa ] unless* ] change-dfa ;
39 : compile-dfa-quot ( regexp -- regexp )
40 dup '[ [ _ compile-regexp dfa>> dfa>quotation ] unless* ] change-dfa-quot ;
42 : <reversed-option> ( ast -- reversed )
43 "r" string>options <with-options> ;
45 : compile-reverse ( regexp -- regexp )
46 dup '[ [ _ get-ast <reversed-option> ast>dfa ] unless* ] change-reverse-dfa ;
48 M: regexp match-index ( string regexp -- index/f )
51 [ compile-regexp dfa>> <dfa-matcher> ] ?if
54 M: reverse-matcher match-index ( string regexp -- index/f )
55 [ <reversed> ] [ regexp>> compile-reverse reverse-dfa>> ] bi*
56 <dfa-traverser> do-match match-index>> ;
58 : find-regexp-syntax ( string -- prefix suffix )
71 } swap [ subseq? not nip ] curry assoc-find drop ;
73 : take-until ( end lexer -- string )
78 ] change-lexer-column ;
80 : parse-noblank-token ( lexer -- str/f )
81 dup still-parsing-line? [ (parse-token) ] [ drop f ] if ;
83 : parsing-regexp ( accum end -- accum )
84 lexer get [ take-until ] [ parse-noblank-token ] bi
85 <optioned-regexp> compile-dfa-quot parsed ;
89 : R! CHAR: ! parsing-regexp ; parsing
90 : R" CHAR: " parsing-regexp ; parsing
91 : R# CHAR: # parsing-regexp ; parsing
92 : R' CHAR: ' parsing-regexp ; parsing
93 : R( CHAR: ) parsing-regexp ; parsing
94 : R/ CHAR: / parsing-regexp ; parsing
95 : R@ CHAR: @ parsing-regexp ; parsing
96 : R[ CHAR: ] parsing-regexp ; parsing
97 : R` CHAR: ` parsing-regexp ; parsing
98 : R{ CHAR: } parsing-regexp ; parsing
99 : R| CHAR: | parsing-regexp ; parsing
104 [ raw>> dup find-regexp-syntax swap % swap % % ]
105 [ options>> options>string % ] bi
107 ] keep present-text ;