1 ! Copyright (C) 2007, 2008 Slava Pestov, Eduardo Cavazos.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel namespaces make sequences sequences.private assocs
4 math vectors strings classes.tuple generalizations parser words
5 quotations macros arrays macros splitting combinators
6 prettyprint.backend prettyprint.custom definitions prettyprint
7 hashtables prettyprint.sections sets sequences.private effects
8 effects.parser generic generic.parser compiler.units accessors
9 locals.backend memoize macros.expander lexer classes summary fry
13 ERROR: >r/r>-in-lambda-error ;
15 M: >r/r>-in-lambda-error summary
17 "Explicit retain stack manipulation is not permitted in lambda bodies" ;
19 ERROR: binding-form-in-literal-error ;
21 M: binding-form-in-literal-error summary
22 drop "[let, [let* and [wlet not permitted inside literals" ;
24 ERROR: local-writer-in-literal-error ;
26 M: local-writer-in-literal-error summary
27 drop "Local writer words not permitted inside literals" ;
29 ERROR: local-word-in-literal-error ;
31 M: local-word-in-literal-error summary
32 drop "Local words not permitted inside literals" ;
34 ERROR: bad-lambda-rewrite output ;
36 M: bad-lambda-rewrite summary
37 drop "You have found a bug in locals. Please report." ;
41 TUPLE: lambda vars body ;
45 TUPLE: binding-form bindings body ;
47 TUPLE: let < binding-form ;
51 TUPLE: let* < binding-form ;
55 TUPLE: wlet < binding-form ;
59 M: lambda expand-macros clone [ expand-macros ] change-body ;
61 M: lambda expand-macros* expand-macros literal ;
63 M: binding-form expand-macros
65 [ [ expand-macros ] assoc-map ] change-bindings
66 [ expand-macros ] change-body ;
68 M: binding-form expand-macros* expand-macros literal ;
70 PREDICATE: local < word "local?" word-prop ;
72 : <local> ( name -- word )
73 #! Create a local variable identifier
75 dup t "local?" set-word-prop ;
77 PREDICATE: local-word < word "local-word?" word-prop ;
79 : <local-word> ( name -- word )
80 f <word> dup t "local-word?" set-word-prop ;
82 PREDICATE: local-reader < word "local-reader?" word-prop ;
84 : <local-reader> ( name -- word )
86 dup t "local-reader?" set-word-prop ;
88 PREDICATE: local-writer < word "local-writer?" word-prop ;
90 : <local-writer> ( reader -- word )
91 dup name>> "!" append f <word> {
92 [ nip t "local-writer?" set-word-prop ]
93 [ swap "local-reader" set-word-prop ]
94 [ "local-writer" set-word-prop ]
102 : local-index ( obj args -- n )
103 [ dup quote? [ local>> ] when eq? ] with find drop ;
105 : read-local-quot ( obj args -- quot )
106 local-index neg [ get-local ] curry ;
108 GENERIC# localize 1 ( obj args -- quot )
110 M: local localize read-local-quot ;
112 M: quote localize [ local>> ] dip read-local-quot ;
114 M: local-word localize read-local-quot [ call ] append ;
116 M: local-reader localize read-local-quot [ local-value ] append ;
118 M: local-writer localize
119 [ "local-reader" word-prop ] dip
120 read-local-quot [ set-local-value ] append ;
122 M: object localize drop 1quotation ;
124 UNION: special local quote local-word local-reader local-writer ;
126 : load-locals-quot ( args -- quot )
128 dup [ local-reader? ] contains? [
129 dup [ local-reader? [ 1array ] [ ] ? ] map spread>quot
130 ] [ [ ] ] if swap length [ load-locals ] curry append
133 : drop-locals-quot ( args -- quot )
134 [ [ ] ] [ length [ drop-locals ] curry ] if-empty ;
136 : point-free-body ( quot args -- newquot )
137 [ but-last-slice ] dip '[ _ localize ] map concat ;
139 : point-free-end ( quot args -- newquot )
141 [ dup drop-locals-quot [ [ peek ] dip localize ] dip append ]
142 [ drop-locals-quot swap peek suffix ]
145 : (point-free) ( quot args -- newquot )
146 [ nip load-locals-quot ]
147 [ reverse point-free-body ]
148 [ reverse point-free-end ]
149 2tri [ ] 3append-as ;
151 : point-free ( quot args -- newquot )
152 over empty? [ nip length '[ _ ndrop ] ] [ (point-free) ] if ;
154 UNION: lexical local local-reader local-writer local-word ;
156 GENERIC: free-vars* ( form -- )
158 : free-vars ( form -- vars )
159 [ free-vars* ] { } make prune ;
161 M: local-writer free-vars* "local-reader" word-prop , ;
163 M: lexical free-vars* , ;
165 M: quote free-vars* , ;
167 M: object free-vars* drop ;
169 M: quotation free-vars* [ free-vars* ] each ;
171 M: lambda free-vars* [ vars>> ] [ body>> ] bi free-vars swap diff % ;
173 GENERIC: lambda-rewrite* ( obj -- )
175 GENERIC: local-rewrite* ( obj -- )
177 : lambda-rewrite ( form -- form' )
179 [ local-rewrite* ] [ ] make
180 [ [ lambda-rewrite* ] each ] [ ] make ;
182 UNION: block callable lambda ;
184 GENERIC: block-vars ( block -- seq )
186 GENERIC: block-body ( block -- quot )
188 M: callable block-vars drop { } ;
190 M: callable block-body ;
192 M: callable local-rewrite*
193 [ [ local-rewrite* ] each ] [ ] make , ;
195 M: lambda block-vars vars>> ;
197 M: lambda block-body body>> ;
199 M: lambda local-rewrite*
200 [ vars>> ] [ body>> ] bi
201 [ [ local-rewrite* ] each ] [ ] make <lambda> , ;
203 M: block lambda-rewrite*
204 #! Turn free variables into bound variables, curry them
206 dup free-vars [ <quote> ] map dup % [
207 over block-vars prepend
208 swap block-body [ [ lambda-rewrite* ] each ] [ ] make
210 ] keep length \ curry <repetition> % ;
212 GENERIC: rewrite-literal? ( obj -- ? )
214 M: special rewrite-literal? drop t ;
216 M: array rewrite-literal? [ rewrite-literal? ] contains? ;
218 M: quotation rewrite-literal? [ rewrite-literal? ] contains? ;
220 M: wrapper rewrite-literal? drop t ;
222 M: hashtable rewrite-literal? drop t ;
224 M: vector rewrite-literal? drop t ;
226 M: tuple rewrite-literal? drop t ;
228 M: object rewrite-literal? drop f ;
230 GENERIC: rewrite-element ( obj -- )
232 : rewrite-elements ( seq -- )
233 [ rewrite-element ] each ;
235 : rewrite-sequence ( seq -- )
236 [ rewrite-elements ] [ length , ] [ 0 head , ] tri \ nsequence , ;
238 M: array rewrite-element
239 dup rewrite-literal? [ rewrite-sequence ] [ , ] if ;
241 M: vector rewrite-element rewrite-sequence ;
243 M: hashtable rewrite-element >alist rewrite-sequence \ >hashtable , ;
245 M: tuple rewrite-element
246 [ tuple-slots rewrite-elements ] [ class literalize , ] bi \ boa , ;
248 M: quotation rewrite-element local-rewrite* ;
250 M: lambda rewrite-element local-rewrite* ;
252 M: binding-form rewrite-element binding-form-in-literal-error ;
254 M: local rewrite-element , ;
256 M: local-reader rewrite-element , ;
258 M: local-writer rewrite-element
259 local-writer-in-literal-error ;
261 M: local-word rewrite-element
262 local-word-in-literal-error ;
264 M: word rewrite-element literalize , ;
266 M: wrapper rewrite-element
267 dup rewrite-literal? [ wrapped>> rewrite-element ] [ , ] if ;
269 M: object rewrite-element , ;
271 M: array local-rewrite* rewrite-element ;
273 M: vector local-rewrite* rewrite-element ;
275 M: tuple local-rewrite* rewrite-element ;
277 M: hashtable local-rewrite* rewrite-element ;
279 M: wrapper local-rewrite* rewrite-element ;
281 M: word local-rewrite*
282 dup { >r r> load-locals get-local drop-locals } memq?
283 [ >r/r>-in-lambda-error ] [ call-next-method ] if ;
285 M: object lambda-rewrite* , ;
287 M: object local-rewrite* , ;
289 : make-local ( name -- word )
292 dup <local-writer> dup name>> set
296 : make-locals ( seq -- words assoc )
297 [ [ make-local ] map ] H{ } make-assoc ;
299 : make-local-word ( name def -- word )
300 [ <local-word> [ dup name>> set ] [ ] [ ] tri ] dip
301 "local-word-def" set-word-prop ;
303 : push-locals ( assoc -- )
306 : pop-locals ( assoc -- )
311 : (parse-lambda) ( assoc end -- quot )
312 t in-lambda? [ parse-until ] with-variable
313 >quotation swap pop-locals ;
315 : parse-lambda ( -- lambda )
316 "|" parse-tokens make-locals dup push-locals
317 \ ] (parse-lambda) <lambda> ;
319 : parse-binding ( end -- pair/f )
321 { [ dup not ] [ unexpected-eof ] }
322 { [ 2dup = ] [ 2drop f ] }
323 [ nip scan-object 2array ]
326 : (parse-bindings) ( end -- )
327 dup parse-binding dup [
328 first2 [ make-local ] dip 2array ,
332 : parse-bindings ( end -- bindings vars )
334 [ (parse-bindings) ] H{ } make-assoc
338 : parse-bindings* ( end -- words assoc )
341 namespace push-locals
347 : (parse-wbindings) ( end -- )
348 dup parse-binding dup [
349 first2 [ make-local-word ] keep 2array ,
353 : parse-wbindings ( end -- bindings vars )
355 [ (parse-wbindings) ] H{ } make-assoc
359 : let-rewrite ( body bindings -- )
361 [ 1array ] dip spin <lambda> '[ @ @ ]
362 ] assoc-each local-rewrite* \ call , ;
364 M: let local-rewrite*
365 [ body>> ] [ bindings>> ] bi let-rewrite ;
367 M: let* local-rewrite*
368 [ body>> ] [ bindings>> ] bi let-rewrite ;
370 M: wlet local-rewrite*
371 [ body>> ] [ bindings>> ] bi
375 : parse-locals ( -- vars assoc )
376 "(" expect ")" parse-effect
377 word [ over "declared-effect" set-word-prop ] when*
378 in>> [ dup pair? [ first ] when ] map make-locals dup push-locals ;
380 : parse-locals-definition ( word -- word quot )
381 parse-locals \ ; (parse-lambda) <lambda>
382 2dup "lambda" set-word-prop
383 lambda-rewrite dup length 1 = [ first ] [ bad-lambda-rewrite ] if ;
385 : (::) ( -- word def ) CREATE-WORD parse-locals-definition ;
387 : (M::) ( -- word def )
389 [ parse-locals-definition ] with-method-definition ;
391 : parsed-lambda ( accum form -- accum )
392 in-lambda? get [ parsed ] [ lambda-rewrite over push-all ] if ;
396 : [| parse-lambda parsed-lambda ; parsing
399 "|" expect "|" parse-bindings
400 \ ] (parse-lambda) <let> parsed-lambda ; parsing
403 "|" expect "|" parse-bindings*
404 \ ] (parse-lambda) <let*> parsed-lambda ; parsing
407 "|" expect "|" parse-wbindings
408 \ ] (parse-lambda) <wlet> parsed-lambda ; parsing
410 : :: (::) define ; parsing
412 : M:: (M::) define ; parsing
414 : MACRO:: (::) define-macro ; parsing
416 : MEMO:: (::) define-memoized ; parsing
420 ! Pretty-printing locals
423 : pprint-var ( var -- )
424 #! Prettyprint a read/write local as its writer, just like
425 #! in the input syntax: [| x! | ... x 3 + x! ]
427 "local-writer" word-prop
430 : pprint-vars ( vars -- ) [ pprint-var ] each ;
435 dup vars>> pprint-vars
437 f <inset body>> pprint-elements block>
441 : pprint-let ( let word -- )
443 [ body>> ] [ bindings>> ] bi
447 [ <block [ pprint-var ] dip pprint* block> ] assoc-each
450 <block pprint-elements block>
454 M: let pprint* \ [let pprint-let ;
456 M: wlet pprint* \ [wlet pprint-let ;
458 M: let* pprint* \ [let* pprint-let ;
460 PREDICATE: lambda-word < word "lambda" word-prop >boolean ;
462 M: lambda-word definer drop \ :: \ ; ;
464 M: lambda-word definition
465 "lambda" word-prop body>> ;
467 M: lambda-word reset-word
468 [ call-next-method ] [ f "lambda" set-word-prop ] bi ;
470 INTERSECTION: lambda-macro macro lambda-word ;
472 M: lambda-macro definer drop \ MACRO:: \ ; ;
474 M: lambda-macro definition
475 "lambda" word-prop body>> ;
477 M: lambda-macro reset-word
478 [ call-next-method ] [ f "lambda" set-word-prop ] bi ;
480 INTERSECTION: lambda-method method-body lambda-word ;
482 M: lambda-method definer drop \ M:: \ ; ;
484 M: lambda-method definition
485 "lambda" word-prop body>> ;
487 M: lambda-method reset-word
488 [ call-next-method ] [ f "lambda" set-word-prop ] bi ;
490 INTERSECTION: lambda-memoized memoized lambda-word ;
492 M: lambda-memoized definer drop \ MEMO:: \ ; ;
494 M: lambda-memoized definition
495 "lambda" word-prop body>> ;
497 M: lambda-memoized reset-word
498 [ call-next-method ] [ f "lambda" set-word-prop ] bi ;
500 : method-stack-effect ( method -- effect )
501 dup "lambda" word-prop vars>>
502 swap "method-generic" word-prop stack-effect
506 M: lambda-method synopsis*
508 "method-class" word-prop pprint-word
509 "method-generic" word-prop pprint-word
510 method-stack-effect effect>string comment. ;
515 M: binding-form count-inputs body>> count-inputs ;
517 M: lambda count-inputs body>> count-inputs ;
520 clone [ shallow-fry swap ] change-body
521 [ [ vars>> length ] keep '[ _ _ mnswap @ ] , ] [ drop [ncurry] % ] 2bi ;
523 M: binding-form deep-fry
524 clone [ fry '[ @ call ] ] change-body , ;