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
8 SINGLETONS: any-char any-char-no-nl
9 letter-class LETTER-class Letter-class digit-class
10 alpha-class non-newline-blank-class
11 ascii-class punctuation-class java-printable-class blank-class
12 control-character-class hex-digit-class java-blank-class c-identifier-class
13 unmatchable-class terminator-class word-boundary-class ;
15 SINGLETONS: beginning-of-input ^ end-of-input $ ;
17 TUPLE: range from to ;
20 GENERIC: class-member? ( obj class -- ? )
22 M: t class-member? ( obj class -- ? ) 2drop t ;
24 M: integer class-member? ( obj class -- ? ) = ;
26 M: range class-member? ( obj class -- ? )
27 [ from>> ] [ to>> ] bi between? ;
29 M: any-char class-member? ( obj class -- ? )
32 M: any-char-no-nl class-member? ( obj class -- ? )
35 M: letter-class class-member? ( obj class -- ? )
38 M: LETTER-class class-member? ( obj class -- ? )
41 M: Letter-class class-member? ( obj class -- ? )
44 M: ascii-class class-member? ( obj class -- ? )
47 M: digit-class class-member? ( obj class -- ? )
50 : c-identifier-char? ( ch -- ? )
51 { [ alpha? ] [ CHAR: _ = ] } 1|| ;
53 M: c-identifier-class class-member? ( obj class -- ? )
54 drop c-identifier-char? ;
56 M: alpha-class class-member? ( obj class -- ? )
60 "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" member? ;
62 M: punctuation-class class-member? ( obj class -- ? )
65 : java-printable? ( ch -- ? )
66 { [ alpha? ] [ punct? ] } 1|| ;
68 M: java-printable-class class-member? ( obj class -- ? )
69 drop java-printable? ;
71 M: non-newline-blank-class class-member? ( obj class -- ? )
72 drop { [ blank? ] [ CHAR: \n = not ] } 1&& ;
74 M: control-character-class class-member? ( obj class -- ? )
77 : hex-digit? ( ch -- ? )
79 [ CHAR: A CHAR: F between? ]
80 [ CHAR: a CHAR: f between? ]
81 [ CHAR: 0 CHAR: 9 between? ]
84 M: hex-digit-class class-member? ( obj class -- ? )
87 : java-blank? ( ch -- ? )
89 CHAR: \s CHAR: \t CHAR: \n
90 HEX: b HEX: 7 CHAR: \r
93 M: java-blank-class class-member? ( obj class -- ? )
96 M: unmatchable-class class-member? ( obj class -- ? )
99 M: terminator-class class-member? ( obj class -- ? )
100 drop "\r\n\u000085\u002029\u002028" member? ;
102 M: ^ class-member? ( obj class -- ? )
105 M: $ class-member? ( obj class -- ? )
108 M: f class-member? 2drop f ;
110 TUPLE: primitive-class class ;
111 C: <primitive-class> primitive-class
113 TUPLE: or-class seq ;
115 TUPLE: not-class class ;
117 TUPLE: and-class seq ;
119 GENERIC: combine-and ( class1 class2 -- combined ? )
121 : replace-if-= ( object object -- object ? )
124 M: object combine-and replace-if-= ;
132 M: not-class combine-and
133 class>> = [ f t ] [ f f ] if ;
135 M: integer combine-and
136 swap 2dup class-member? [ drop t ] [ 2drop f t ] if ;
138 GENERIC: combine-or ( class1 class2 -- combined ? )
140 M: object combine-or replace-if-= ;
148 M: not-class combine-or
149 class>> = [ t t ] [ f f ] if ;
151 M: integer combine-or
152 2dup swap class-member? [ drop t ] [ 2drop f f ] if ;
154 MACRO: instance? ( class -- ? )
155 "predicate" word-prop ;
157 : flatten ( seq class -- newseq )
158 '[ dup _ instance? [ seq>> ] [ 1array ] if ] map concat ; inline
160 : try-combine ( elt1 elt2 quot -- combined/f ? )
161 3dup call [ [ 3drop ] dip t ] [ drop swapd call ] if ; inline
163 :: prefix-combining ( seq elt quot: ( elt1 elt2 -- combined/f ? ) -- newseq )
165 seq [ elt quot try-combine swap combined! ] find drop
166 [ seq remove-nth combined prefix ]
167 [ seq elt prefix ] if* ; inline
169 :: combine ( seq quot: ( elt1 elt2 -- combined/f ? ) empty class -- newseq )
171 { } [ quot prefix-combining ] reduce
175 [ drop class new swap >>seq ]
178 : <and-class> ( seq -- class )
179 [ combine-and ] t and-class combine ;
181 M: and-class class-member?
182 seq>> [ class-member? ] with all? ;
184 : <or-class> ( seq -- class )
185 [ combine-or ] f or-class combine ;
187 M: or-class class-member?
188 seq>> [ class-member? ] with any? ;
190 GENERIC: <not-class> ( class -- inverse )
192 M: object <not-class>
195 M: not-class <not-class>
198 M: and-class <not-class>
199 seq>> [ <not-class> ] map <or-class> ;
201 M: or-class <not-class>
202 seq>> [ <not-class> ] map <and-class> ;
204 M: not-class class-member?
205 class>> class-member? not ;
207 M: primitive-class class-member?
208 class>> class-member? ;
210 UNION: class primitive-class not-class or-class and-class range ;