1 ! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors kernel math math.order words combinators locals
4 ascii unicode.categories combinators.short-circuit sequences ;
7 SINGLETONS: any-char any-char-no-nl
8 letter-class LETTER-class Letter-class digit-class
9 alpha-class non-newline-blank-class
10 ascii-class punctuation-class java-printable-class blank-class
11 control-character-class hex-digit-class java-blank-class c-identifier-class
12 unmatchable-class terminator-class word-boundary-class ;
14 SINGLETONS: beginning-of-input ^ end-of-input $ ;
16 TUPLE: range from to ;
19 GENERIC: class-member? ( obj class -- ? )
21 M: t class-member? ( obj class -- ? ) 2drop t ;
23 M: integer class-member? ( obj class -- ? ) = ;
25 M: range class-member? ( obj class -- ? )
26 [ from>> ] [ to>> ] bi between? ;
28 M: any-char class-member? ( obj class -- ? )
31 M: any-char-no-nl class-member? ( obj class -- ? )
34 M: letter-class class-member? ( obj class -- ? )
37 M: LETTER-class class-member? ( obj class -- ? )
40 M: Letter-class class-member? ( obj class -- ? )
43 M: ascii-class class-member? ( obj class -- ? )
46 M: digit-class class-member? ( obj class -- ? )
49 : c-identifier-char? ( ch -- ? )
50 { [ alpha? ] [ CHAR: _ = ] } 1|| ;
52 M: c-identifier-class class-member? ( obj class -- ? )
53 drop c-identifier-char? ;
55 M: alpha-class class-member? ( obj class -- ? )
59 "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" member? ;
61 M: punctuation-class class-member? ( obj class -- ? )
64 : java-printable? ( ch -- ? )
65 { [ alpha? ] [ punct? ] } 1|| ;
67 M: java-printable-class class-member? ( obj class -- ? )
68 drop java-printable? ;
70 M: non-newline-blank-class class-member? ( obj class -- ? )
71 drop { [ blank? ] [ CHAR: \n = not ] } 1&& ;
73 M: control-character-class class-member? ( obj class -- ? )
76 : hex-digit? ( ch -- ? )
78 [ CHAR: A CHAR: F between? ]
79 [ CHAR: a CHAR: f between? ]
80 [ CHAR: 0 CHAR: 9 between? ]
83 M: hex-digit-class class-member? ( obj class -- ? )
86 : java-blank? ( ch -- ? )
88 CHAR: \s CHAR: \t CHAR: \n
89 HEX: b HEX: 7 CHAR: \r
92 M: java-blank-class class-member? ( obj class -- ? )
95 M: unmatchable-class class-member? ( obj class -- ? )
98 M: terminator-class class-member? ( obj class -- ? )
99 drop "\r\n\u000085\u002029\u002028" member? ;
101 M: ^ class-member? ( obj class -- ? )
104 M: $ class-member? ( obj class -- ? )
107 M: f class-member? 2drop f ;
109 TUPLE: primitive-class class ;
110 C: <primitive-class> primitive-class
112 TUPLE: or-class seq ;
114 TUPLE: not-class class ;
116 TUPLE: and-class seq ;
118 GENERIC: combine-and ( class1 class2 -- combined ? )
120 : replace-if-= ( object object -- object ? )
123 M: object combine-and replace-if-= ;
131 M: not-class combine-and
132 class>> = [ f t ] [ f f ] if ;
134 M: integer combine-and
135 swap 2dup class-member? [ drop t ] [ 2drop f t ] if ;
137 GENERIC: combine-or ( class1 class2 -- combined ? )
139 M: object combine-or replace-if-= ;
147 M: not-class combine-or
148 class>> = [ t t ] [ f f ] if ;
150 M: integer combine-or
151 2dup swap class-member? [ drop t ] [ 2drop f f ] if ;
153 : try-combine ( elt1 elt2 quot -- combined/f ? )
154 3dup call [ [ 3drop ] dip t ] [ drop swapd call ] if ; inline
156 :: prefix-combining ( seq elt quot: ( elt1 elt2 -- combined/f ? ) -- newseq )
158 seq [ elt quot try-combine swap combined! ] find drop
159 [ seq remove-nth combined prefix ]
160 [ seq elt prefix ] if* ; inline
162 :: combine ( seq quot: ( elt1 elt2 -- combined/f ? ) empty class -- newseq )
163 seq { } [ quot prefix-combining ] reduce
167 [ drop class new swap >>seq ]
170 : <and-class> ( seq -- class )
171 [ combine-and ] t and-class combine ;
173 M: and-class class-member?
174 seq>> [ class-member? ] with all? ;
176 : <or-class> ( seq -- class )
177 [ combine-or ] f or-class combine ;
179 M: or-class class-member?
180 seq>> [ class-member? ] with any? ;
182 : <not-class> ( class -- inverse )
186 [ dup not-class? [ class>> ] [ not-class boa ] if ]
189 M: not-class class-member?
190 class>> class-member? not ;
192 M: primitive-class class-member?
193 class>> class-member? ;
195 UNION: class primitive-class not-class or-class range ;