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 debugger macros arrays macros splitting combinators
6 prettyprint.backend definitions prettyprint hashtables
7 prettyprint.sections sets sequences.private effects
8 effects.parser generic generic.parser compiler.units accessors
9 locals.backend memoize macros.expander lexer
10 stack-checker.known-words ;
14 ! http://cat-language.googlecode.com/svn/trunk/CatPointFreeForm.cs
18 TUPLE: lambda vars body ;
22 TUPLE: binding-form bindings body ;
24 TUPLE: let < binding-form ;
28 TUPLE: let* < binding-form ;
32 TUPLE: wlet < binding-form ;
36 M: lambda expand-macros clone [ expand-macros ] change-body ;
38 M: binding-form expand-macros
40 [ [ expand-macros ] assoc-map ] change-bindings
41 [ expand-macros ] change-body ;
43 PREDICATE: local < word "local?" word-prop ;
45 : <local> ( name -- word )
46 #! Create a local variable identifier
48 dup t "local?" set-word-prop
49 dup { } { object } define-primitive ;
51 PREDICATE: local-word < word "local-word?" word-prop ;
53 : <local-word> ( name -- word )
54 f <word> dup t "local-word?" set-word-prop ;
56 PREDICATE: local-reader < word "local-reader?" word-prop ;
58 : <local-reader> ( name -- word )
60 dup t "local-reader?" set-word-prop
61 dup { } { object } define-primitive ;
63 PREDICATE: local-writer < word "local-writer?" word-prop ;
65 : <local-writer> ( reader -- word )
66 dup name>> "!" append f <word> {
67 [ nip { object } { } define-primitive ]
68 [ nip t "local-writer?" set-word-prop ]
69 [ swap "local-reader" set-word-prop ]
70 [ "local-writer" set-word-prop ]
78 : local-index ( obj args -- n )
79 [ dup quote? [ local>> ] when eq? ] with find drop ;
81 : read-local-quot ( obj args -- quot )
82 local-index 1+ [ get-local ] curry ;
84 : localize-writer ( obj args -- quot )
85 >r "local-reader" word-prop r>
86 read-local-quot [ set-local-value ] append ;
88 : localize ( obj args -- quot )
90 { [ over local? ] [ read-local-quot ] }
91 { [ over quote? ] [ >r local>> r> read-local-quot ] }
92 { [ over local-word? ] [ read-local-quot [ call ] append ] }
93 { [ over local-reader? ] [ read-local-quot [ local-value ] append ] }
94 { [ over local-writer? ] [ localize-writer ] }
95 { [ over \ lambda eq? ] [ 2drop [ ] ] }
96 { [ t ] [ drop 1quotation ] }
99 UNION: special local quote local-word local-reader local-writer ;
101 : load-locals-quot ( args -- quot )
105 dup [ local-reader? ] contains? [
107 local-reader? [ 1array >r ] [ >r ] ?
110 length [ load-locals ] curry >quotation
114 : drop-locals-quot ( args -- quot )
115 [ [ ] ] [ length [ drop-locals ] curry ] if-empty ;
117 : point-free-body ( quot args -- newquot )
118 >r but-last-slice r> [ localize ] curry map concat ;
120 : point-free-end ( quot args -- newquot )
122 [ dup drop-locals-quot >r >r peek r> localize r> append ]
123 [ dup drop-locals-quot nip swap peek suffix ]
126 : (point-free) ( quot args -- newquot )
127 [ nip load-locals-quot ]
130 2tri 3append >quotation ;
132 : point-free ( quot args -- newquot )
134 [ nip length \ drop <repetition> >quotation ]
135 [ (point-free) ] if ;
137 UNION: lexical local local-reader local-writer local-word ;
139 GENERIC: free-vars* ( form -- )
141 : free-vars ( form -- vars )
142 [ free-vars* ] { } make prune ;
144 : add-if-free ( object -- )
146 { [ dup local-writer? ] [ "local-reader" word-prop , ] }
147 { [ dup lexical? ] [ , ] }
148 { [ dup quote? ] [ local>> , ] }
149 { [ t ] [ free-vars* ] }
152 M: object free-vars* drop ;
154 M: quotation free-vars* [ add-if-free ] each ;
157 [ vars>> ] [ body>> ] bi free-vars swap diff % ;
159 GENERIC: lambda-rewrite* ( obj -- )
161 GENERIC: local-rewrite* ( obj -- )
163 : lambda-rewrite ( form -- form' )
165 [ local-rewrite* ] [ ] make
166 [ [ lambda-rewrite* ] each ] [ ] make ;
168 UNION: block callable lambda ;
170 GENERIC: block-vars ( block -- seq )
172 GENERIC: block-body ( block -- quot )
174 M: callable block-vars drop { } ;
176 M: callable block-body ;
178 M: callable local-rewrite*
179 [ [ local-rewrite* ] each ] [ ] make , ;
181 M: lambda block-vars vars>> ;
183 M: lambda block-body body>> ;
185 M: lambda local-rewrite*
186 [ vars>> ] [ body>> ] bi
187 [ [ local-rewrite* ] each ] [ ] make <lambda> , ;
189 M: block lambda-rewrite*
190 #! Turn free variables into bound variables, curry them
192 dup free-vars [ <quote> ] map dup % [
193 over block-vars prepend
194 swap block-body [ [ lambda-rewrite* ] each ] [ ] make
196 ] keep length \ curry <repetition> % ;
198 M: object lambda-rewrite* , ;
200 M: object local-rewrite* , ;
202 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
204 ! Broil is used to support locals in literals
207 DEFER: [broil-hashtable]
210 : broil-element ( obj -- quot )
212 { [ dup number? ] [ 1quotation ] }
213 { [ dup string? ] [ 1quotation ] }
214 { [ dup sequence? ] [ [broil] ] }
215 { [ dup hashtable? ] [ [broil-hashtable] ] }
216 { [ dup tuple? ] [ [broil-tuple] ] }
217 { [ dup local? ] [ 1quotation ] }
218 { [ dup word? ] [ literalize 1quotation ] }
219 { [ t ] [ 1quotation ] }
223 : [broil] ( seq -- quot )
224 [ [ broil-element ] map concat >quotation ]
228 [ nsequence ] curry curry compose ;
230 MACRO: broil ( seq -- quot ) [broil] ;
232 : [broil-hashtable] ( hashtable -- quot )
234 [ [ broil-element ] map concat >quotation ]
238 [ nsequence >hashtable ] curry curry compose ;
240 MACRO: broil-hashtable ( hashtable -- quot ) [broil-hashtable] ;
242 : [broil-tuple] ( tuple -- quot )
244 [ [ broil-element ] map concat >quotation ]
248 [ nsequence >tuple ] curry curry compose ;
250 MACRO: broil-tuple ( tuple -- quot ) [broil-tuple] ;
252 ! Engage broil on arrays and vectors. Can't do it on 'sequence'
253 ! because that will pick up strings and integers. What do do...
255 M: array local-rewrite* ( array -- ) [broil] % ;
256 M: vector local-rewrite* ( vector -- ) [broil] % ;
257 M: tuple local-rewrite* ( tuple -- ) [broil-tuple] % ;
258 M: hashtable local-rewrite* ( hashtable -- ) [broil-hashtable] % ;
260 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
262 : make-local ( name -- word )
265 dup <local-writer> dup name>> set
269 : make-locals ( seq -- words assoc )
270 [ [ make-local ] map ] H{ } make-assoc ;
272 : make-local-word ( name -- word )
273 <local-word> dup dup name>> set ;
275 : push-locals ( assoc -- )
278 : pop-locals ( assoc -- )
283 : (parse-lambda) ( assoc end -- quot )
284 t in-lambda? [ parse-until ] with-variable
285 >quotation swap pop-locals ;
287 : parse-lambda ( -- lambda )
288 "|" parse-tokens make-locals dup push-locals
289 \ ] (parse-lambda) <lambda> ;
291 : parse-binding ( -- pair/f )
296 { "[" [ \ ] parse-until >quotation ] }
297 { "[|" [ parse-lambda ] }
301 : (parse-bindings) ( -- )
303 first2 >r make-local r> 2array ,
307 : parse-bindings ( -- bindings vars )
309 [ (parse-bindings) ] H{ } make-assoc
313 : parse-bindings* ( -- words assoc )
316 namespace push-locals
322 : (parse-wbindings) ( -- )
324 first2 >r make-local-word r> 2array ,
328 : parse-wbindings ( -- bindings vars )
330 [ (parse-wbindings) ] H{ } make-assoc
334 : let-rewrite ( body bindings -- )
336 >r 1array r> spin <lambda> [ call ] curry compose
337 ] assoc-each local-rewrite* \ call , ;
339 M: let local-rewrite*
340 [ body>> ] [ bindings>> ] bi let-rewrite ;
342 M: let* local-rewrite*
343 [ body>> ] [ bindings>> ] bi let-rewrite ;
345 M: wlet local-rewrite*
346 [ body>> ] [ bindings>> ] bi
347 [ [ ] curry ] assoc-map
350 : parse-locals ( -- vars assoc )
352 word [ over "declared-effect" set-word-prop ] when*
353 in>> [ dup pair? [ first ] when ] map make-locals dup push-locals ;
355 : parse-locals-definition ( word -- word quot )
356 scan "(" assert= parse-locals \ ; (parse-lambda) <lambda>
357 2dup "lambda" set-word-prop
358 lambda-rewrite first ;
360 : (::) ( -- word def ) CREATE-WORD parse-locals-definition ;
362 : (M::) ( -- word def )
364 [ parse-locals-definition ] with-method-definition ;
366 : parsed-lambda ( accum form -- accum )
367 in-lambda? get [ parsed ] [ lambda-rewrite over push-all ] if ;
371 : [| parse-lambda parsed-lambda ; parsing
374 scan "|" assert= parse-bindings
375 \ ] (parse-lambda) <let> parsed-lambda ; parsing
378 scan "|" assert= parse-bindings*
379 \ ] (parse-lambda) <let*> parsed-lambda ; parsing
382 scan "|" assert= parse-wbindings
383 \ ] (parse-lambda) <wlet> parsed-lambda ; parsing
385 : :: (::) define ; parsing
387 : M:: (M::) define ; parsing
389 : MACRO:: (::) define-macro ; parsing
391 : MEMO:: (::) define-memoized ; parsing
395 ! Pretty-printing locals
398 : pprint-var ( var -- )
399 #! Prettyprint a read/write local as its writer, just like
400 #! in the input syntax: [| x! | ... x 3 + x! ]
402 "local-writer" word-prop
405 : pprint-vars ( vars -- ) [ pprint-var ] each ;
410 dup vars>> pprint-vars
412 f <inset body>> pprint-elements block>
416 : pprint-let ( let word -- )
418 [ body>> ] [ bindings>> ] bi
422 [ <block >r pprint-var r> pprint* block> ] assoc-each
425 <block pprint-elements block>
429 M: let pprint* \ [let pprint-let ;
431 M: wlet pprint* \ [wlet pprint-let ;
433 M: let* pprint* \ [let* pprint-let ;
435 PREDICATE: lambda-word < word "lambda" word-prop >boolean ;
437 M: lambda-word definer drop \ :: \ ; ;
439 M: lambda-word definition
440 "lambda" word-prop body>> ;
442 M: lambda-word reset-word
443 [ call-next-method ] [ f "lambda" set-word-prop ] bi ;
445 INTERSECTION: lambda-macro macro lambda-word ;
447 M: lambda-macro definer drop \ MACRO:: \ ; ;
449 M: lambda-macro definition
450 "lambda" word-prop body>> ;
452 M: lambda-macro reset-word
453 [ f "lambda" set-word-prop ] [ call-next-method ] bi ;
455 INTERSECTION: lambda-method method-body lambda-word ;
457 M: lambda-method definer drop \ M:: \ ; ;
459 M: lambda-method definition
460 "lambda" word-prop body>> ;
462 M: lambda-method reset-word
463 [ f "lambda" set-word-prop ] [ call-next-method ] bi ;
465 INTERSECTION: lambda-memoized memoized lambda-word ;
467 M: lambda-memoized definer drop \ MEMO:: \ ; ;
469 M: lambda-memoized definition
470 "lambda" word-prop body>> ;
472 M: lambda-memoized reset-word
473 [ f "lambda" set-word-prop ] [ call-next-method ] bi ;
475 : method-stack-effect ( method -- effect )
476 dup "lambda" word-prop vars>>
477 swap "method-generic" word-prop stack-effect
481 M: lambda-method synopsis*
483 "method-class" word-prop pprint-word
484 "method-generic" word-prop pprint-word
485 method-stack-effect effect>string comment. ;