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
5 fry macros arrays assocs sets classes ;
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 $ end-of-file ;
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>> 2dup = [ 2drop f t ] [
135 2dup swap class-member?
141 M: integer combine-and
142 swap 2dup class-member? [ drop t ] [ 2drop f t ] if ;
144 GENERIC: combine-or ( class1 class2 -- combined ? )
146 M: object combine-or replace-if-= ;
154 M: not-class combine-or
155 class>> = [ t t ] [ f f ] if ;
157 M: integer combine-or
158 2dup swap class-member? [ drop t ] [ 2drop f f ] if ;
160 : flatten ( seq class -- newseq )
161 '[ dup _ instance? [ seq>> ] [ 1array ] if ] map concat ; inline
163 : try-combine ( elt1 elt2 quot -- combined/f ? )
164 3dup call [ [ 3drop ] dip t ] [ drop swapd call ] if ; inline
166 :: prefix-combining ( seq elt quot: ( elt1 elt2 -- combined/f ? ) -- newseq )
168 seq [ elt quot try-combine swap combined! ] find drop
169 [ seq remove-nth combined prefix ]
170 [ seq elt prefix ] if* ; inline
172 :: combine ( seq quot: ( elt1 elt2 -- combined/f ? ) empty class -- newseq )
174 { } [ quot prefix-combining ] reduce
178 [ drop class new swap >>seq ]
181 : <and-class> ( seq -- class )
182 [ combine-and ] t and-class combine ;
184 M: and-class class-member?
185 seq>> [ class-member? ] with all? ;
187 : <or-class> ( seq -- class )
188 [ combine-or ] f or-class combine ;
190 M: or-class class-member?
191 seq>> [ class-member? ] with any? ;
193 GENERIC: <not-class> ( class -- inverse )
195 M: object <not-class>
198 M: not-class <not-class>
201 M: and-class <not-class>
202 seq>> [ <not-class> ] map <or-class> ;
204 M: or-class <not-class>
205 seq>> [ <not-class> ] map <and-class> ;
207 M: t <not-class> drop f ;
208 M: f <not-class> drop t ;
210 M: not-class class-member?
211 class>> class-member? not ;
213 M: primitive-class class-member?
214 class>> class-member? ;
216 UNION: class primitive-class not-class or-class and-class range ;
218 TUPLE: condition question yes no ;
219 C: <condition> condition
221 GENERIC# replace-question 2 ( class from to -- new-class )
223 M:: object replace-question ( class from to -- new-class )
224 class from = to class ? ;
226 : replace-compound ( class from to -- seq )
227 [ seq>> ] 2dip '[ _ _ replace-question ] map ;
229 M: and-class replace-question
230 replace-compound <and-class> ;
232 M: or-class replace-question
233 replace-compound <or-class> ;
235 M: not-class replace-question
236 [ class>> ] 2dip replace-question <not-class> ;
238 : answer ( table question answer -- new-table )
239 '[ _ _ replace-question ] assoc-map
240 [ nip ] assoc-filter ;
242 : answers ( table questions answer -- new-table )
245 DEFER: make-condition
247 : (make-condition) ( table questions question -- condition )
249 [ swap [ t answer ] dip make-condition ]
250 [ swap [ f answer ] dip make-condition ] 3tri
251 2dup = [ 2nip ] [ <condition> ] if ;
253 : make-condition ( table questions -- condition )
254 [ keys ] [ unclip (make-condition) ] if-empty ;
256 GENERIC: class>questions ( class -- questions )
257 : compound-questions ( class -- questions ) seq>> [ class>questions ] gather ;
258 M: or-class class>questions compound-questions ;
259 M: and-class class>questions compound-questions ;
260 M: not-class class>questions class>> class>questions ;
261 M: object class>questions 1array ;
263 : table>questions ( table -- questions )
264 values [ class>questions ] gather >array t swap remove ;
266 : table>condition ( table -- condition )
267 ! input table is state => class
268 >alist dup table>questions make-condition ;
270 : condition-map ( condition quot: ( obj -- obj' ) -- new-condition )
272 [ [ question>> ] [ yes>> ] [ no>> ] tri ] dip
273 '[ _ condition-map ] bi@ <condition>
274 ] [ call ] if ; inline recursive
276 : condition-states ( condition -- states )
278 [ yes>> ] [ no>> ] bi
279 [ condition-states ] bi@ append prune
282 : condition-at ( condition assoc -- new-condition )
283 '[ _ at ] condition-map ;