1 ;;;; Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
3 ;;;; This library is free software; you can redistribute it and/or
4 ;;;; modify it under the terms of the GNU Lesser General Public
5 ;;;; License as published by the Free Software Foundation; either
6 ;;;; version 3 of the License, or (at your option) any later version.
8 ;;;; This library is distributed in the hope that it will be useful,
9 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 ;;;; Lesser General Public License for more details.
13 ;;;; You should have received a copy of the GNU Lesser General Public
14 ;;;; License along with this library; if not, write to the Free Software
15 ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 (define-module (language tree-il)
20 #:use-module (srfi srfi-1)
21 #:use-module (srfi srfi-11)
22 #:use-module (system base pmatch)
23 #:use-module (system base syntax)
26 <void> void? make-void void-src
27 <const> const? make-const const-src const-exp
28 <primitive-ref> primitive-ref? make-primitive-ref primitive-ref-src primitive-ref-name
29 <lexical-ref> lexical-ref? make-lexical-ref lexical-ref-src lexical-ref-name lexical-ref-gensym
30 <lexical-set> lexical-set? make-lexical-set lexical-set-src lexical-set-name lexical-set-gensym lexical-set-exp
31 <module-ref> module-ref? make-module-ref module-ref-src module-ref-mod module-ref-name module-ref-public?
32 <module-set> module-set? make-module-set module-set-src module-set-mod module-set-name module-set-public? module-set-exp
33 <toplevel-ref> toplevel-ref? make-toplevel-ref toplevel-ref-src toplevel-ref-name
34 <toplevel-set> toplevel-set? make-toplevel-set toplevel-set-src toplevel-set-name toplevel-set-exp
35 <toplevel-define> toplevel-define? make-toplevel-define toplevel-define-src toplevel-define-name toplevel-define-exp
36 <conditional> conditional? make-conditional conditional-src conditional-test conditional-consequent conditional-alternate
37 <application> application? make-application application-src application-proc application-args
38 <sequence> sequence? make-sequence sequence-src sequence-exps
39 <lambda> lambda? make-lambda lambda-src lambda-meta lambda-body
40 <lambda-case> lambda-case? make-lambda-case lambda-case-src
41 lambda-case-req lambda-case-opt lambda-case-rest lambda-case-kw
42 lambda-case-inits lambda-case-gensyms
43 lambda-case-body lambda-case-alternate
44 <let> let? make-let let-src let-names let-gensyms let-vals let-body
45 <letrec> letrec? make-letrec letrec-src letrec-in-order? letrec-names letrec-gensyms letrec-vals letrec-body
46 <fix> fix? make-fix fix-src fix-names fix-gensyms fix-vals fix-body
47 <let-values> let-values? make-let-values let-values-src let-values-exp let-values-body
48 <dynwind> dynwind? make-dynwind dynwind-src dynwind-winder dynwind-body dynwind-unwinder
49 <dynlet> dynlet? make-dynlet dynlet-src dynlet-fluids dynlet-vals dynlet-body
50 <dynref> dynref? make-dynref dynref-src dynref-fluid
51 <dynset> dynset? make-dynset dynset-src dynset-fluid dynset-exp
52 <prompt> prompt? make-prompt prompt-src prompt-tag prompt-body prompt-handler
53 <abort> abort? make-abort abort-src abort-tag abort-args abort-tail
64 (define (print-tree-il exp port)
65 (format port "#<tree-il ~S>" (unparse-tree-il exp)))
67 (define-syntax borrow-core-vtables
71 (let lp ((n 0) (out '()))
72 (if (< n (vector-length %expanded-vtables))
74 (let* ((vtable (vector-ref %expanded-vtables n))
75 (stem (struct-ref vtable (+ vtable-offset-user 0)))
76 (fields (struct-ref vtable (+ vtable-offset-user 2)))
78 (lambda (f) (datum->syntax x f))
80 (type (datum->syntax x (symbol-append '< stem '>)))
81 (ctor (datum->syntax x (symbol-append 'make- stem)))
82 (pred (datum->syntax x (symbol-append stem '?))))
83 (let lp ((n 0) (fields fields)
85 #`(define (#,ctor #,@sfields)
86 (make-struct #,type 0 #,@sfields))
89 (eq? (struct-vtable x) #,type)))
90 #`(struct-set! #,type vtable-index-printer
93 (vector-ref %expanded-vtables #,n))
99 (let ((acc (datum->syntax
100 x (symbol-append stem '- (car fields)))))
101 (cons #`(define #,acc
102 (make-procedure-with-setter
103 (lambda (x) (struct-ref x #,n))
104 (lambda (x v) (struct-set! x #,n v))))
106 #`(begin #,@(reverse out))))))))
108 (borrow-core-vtables)
112 ;; (<primitive-ref> name)
113 ;; (<lexical-ref> name gensym)
114 ;; (<lexical-set> name gensym exp)
115 ;; (<module-ref> mod name public?)
116 ;; (<module-set> mod name public? exp)
117 ;; (<toplevel-ref> name)
118 ;; (<toplevel-set> name exp)
119 ;; (<toplevel-define> name exp)
120 ;; (<conditional> test consequent alternate)
121 ;; (<application> proc args)
123 ;; (<lambda> meta body)
124 ;; (<lambda-case> req opt rest kw inits gensyms body alternate)
125 ;; (<let> names gensyms vals body)
126 ;; (<letrec> in-order? names gensyms vals body)
127 ;; (<dynlet> fluids vals body)
129 (define-type (<tree-il> #:common-slots (src) #:printer print-tree-il)
130 (<fix> names gensyms vals body)
131 (<let-values> exp body)
132 (<dynwind> winder body unwinder)
135 (<prompt> tag body handler)
136 (<abort> tag args tail))
142 (let ((props (source-properties x)))
143 (and (pair? props) props))))
145 (define (parse-tree-il exp)
146 (let ((loc (location exp))
147 (retrans (lambda (x) (parse-tree-il x))))
152 ((apply ,proc . ,args)
153 (make-application loc (retrans proc) (map retrans args)))
155 ((if ,test ,consequent ,alternate)
156 (make-conditional loc (retrans test) (retrans consequent) (retrans alternate)))
158 ((primitive ,name) (guard (symbol? name))
159 (make-primitive-ref loc name))
161 ((lexical ,name) (guard (symbol? name))
162 (make-lexical-ref loc name name))
164 ((lexical ,name ,sym) (guard (symbol? name) (symbol? sym))
165 (make-lexical-ref loc name sym))
167 ((set! (lexical ,name) ,exp) (guard (symbol? name))
168 (make-lexical-set loc name name (retrans exp)))
170 ((set! (lexical ,name ,sym) ,exp) (guard (symbol? name) (symbol? sym))
171 (make-lexical-set loc name sym (retrans exp)))
173 ((@ ,mod ,name) (guard (and-map symbol? mod) (symbol? name))
174 (make-module-ref loc mod name #t))
176 ((set! (@ ,mod ,name) ,exp) (guard (and-map symbol? mod) (symbol? name))
177 (make-module-set loc mod name #t (retrans exp)))
179 ((@@ ,mod ,name) (guard (and-map symbol? mod) (symbol? name))
180 (make-module-ref loc mod name #f))
182 ((set! (@@ ,mod ,name) ,exp) (guard (and-map symbol? mod) (symbol? name))
183 (make-module-set loc mod name #f (retrans exp)))
185 ((toplevel ,name) (guard (symbol? name))
186 (make-toplevel-ref loc name))
188 ((set! (toplevel ,name) ,exp) (guard (symbol? name))
189 (make-toplevel-set loc name (retrans exp)))
191 ((define ,name ,exp) (guard (symbol? name))
192 (make-toplevel-define loc name (retrans exp)))
194 ((lambda ,meta ,body)
195 (make-lambda loc meta (retrans body)))
197 ((lambda-case ((,req ,opt ,rest ,kw ,inits ,gensyms) ,body) ,alternate)
198 (make-lambda-case loc req opt rest kw
199 (map retrans inits) gensyms
201 (and=> alternate retrans)))
203 ((lambda-case ((,req ,opt ,rest ,kw ,inits ,gensyms) ,body))
204 (make-lambda-case loc req opt rest kw
205 (map retrans inits) gensyms
210 (make-const loc exp))
213 (make-sequence loc (map retrans exps)))
215 ((let ,names ,gensyms ,vals ,body)
216 (make-let loc names gensyms (map retrans vals) (retrans body)))
218 ((letrec ,names ,gensyms ,vals ,body)
219 (make-letrec loc #f names gensyms (map retrans vals) (retrans body)))
221 ((letrec* ,names ,gensyms ,vals ,body)
222 (make-letrec loc #t names gensyms (map retrans vals) (retrans body)))
224 ((fix ,names ,gensyms ,vals ,body)
225 (make-fix loc names gensyms (map retrans vals) (retrans body)))
227 ((let-values ,exp ,body)
228 (make-let-values loc (retrans exp) (retrans body)))
230 ((dynwind ,winder ,body ,unwinder)
231 (make-dynwind loc (retrans winder) (retrans body) (retrans unwinder)))
233 ((dynlet ,fluids ,vals ,body)
234 (make-dynlet loc (map retrans fluids) (map retrans vals) (retrans body)))
237 (make-dynref loc (retrans fluid)))
239 ((dynset ,fluid ,exp)
240 (make-dynset loc (retrans fluid) (retrans exp)))
242 ((prompt ,tag ,body ,handler)
243 (make-prompt loc (retrans tag) (retrans body) (retrans handler)))
245 ((abort ,tag ,args ,tail)
246 (make-abort loc (retrans tag) (map retrans args) (retrans tail)))
249 (error "unrecognized tree-il" exp)))))
251 (define (unparse-tree-il tree-il)
256 ((<application> proc args)
257 `(apply ,(unparse-tree-il proc) ,@(map unparse-tree-il args)))
259 ((<conditional> test consequent alternate)
260 `(if ,(unparse-tree-il test) ,(unparse-tree-il consequent) ,(unparse-tree-il alternate)))
262 ((<primitive-ref> name)
265 ((<lexical-ref> name gensym)
266 `(lexical ,name ,gensym))
268 ((<lexical-set> name gensym exp)
269 `(set! (lexical ,name ,gensym) ,(unparse-tree-il exp)))
271 ((<module-ref> mod name public?)
272 `(,(if public? '@ '@@) ,mod ,name))
274 ((<module-set> mod name public? exp)
275 `(set! (,(if public? '@ '@@) ,mod ,name) ,(unparse-tree-il exp)))
277 ((<toplevel-ref> name)
280 ((<toplevel-set> name exp)
281 `(set! (toplevel ,name) ,(unparse-tree-il exp)))
283 ((<toplevel-define> name exp)
284 `(define ,name ,(unparse-tree-il exp)))
286 ((<lambda> meta body)
287 `(lambda ,meta ,(unparse-tree-il body)))
289 ((<lambda-case> req opt rest kw inits gensyms body alternate)
290 `(lambda-case ((,req ,opt ,rest ,kw ,(map unparse-tree-il inits) ,gensyms)
291 ,(unparse-tree-il body))
292 . ,(if alternate (list (unparse-tree-il alternate)) '())))
298 `(begin ,@(map unparse-tree-il exps)))
300 ((<let> names gensyms vals body)
301 `(let ,names ,gensyms ,(map unparse-tree-il vals) ,(unparse-tree-il body)))
303 ((<letrec> in-order? names gensyms vals body)
304 `(,(if in-order? 'letrec* 'letrec) ,names ,gensyms
305 ,(map unparse-tree-il vals) ,(unparse-tree-il body)))
307 ((<fix> names gensyms vals body)
308 `(fix ,names ,gensyms ,(map unparse-tree-il vals) ,(unparse-tree-il body)))
310 ((<let-values> exp body)
311 `(let-values ,(unparse-tree-il exp) ,(unparse-tree-il body)))
313 ((<dynwind> body winder unwinder)
314 `(dynwind ,(unparse-tree-il body)
315 ,(unparse-tree-il winder) ,(unparse-tree-il unwinder)))
317 ((<dynlet> fluids vals body)
318 `(dynlet ,(map unparse-tree-il fluids) ,(map unparse-tree-il vals)
319 ,(unparse-tree-il body)))
322 `(dynref ,(unparse-tree-il fluid)))
324 ((<dynset> fluid exp)
325 `(dynref ,(unparse-tree-il fluid) ,(unparse-tree-il exp)))
327 ((<prompt> tag body handler)
328 `(prompt ,(unparse-tree-il tag) ,(unparse-tree-il body) ,(unparse-tree-il handler)))
330 ((<abort> tag args tail)
331 `(abort ,(unparse-tree-il tag) ,(map unparse-tree-il args)
332 ,(unparse-tree-il tail)))))
334 (define (tree-il->scheme e)
339 ((<application> proc args)
340 `(,(tree-il->scheme proc) ,@(map tree-il->scheme args)))
342 ((<conditional> test consequent alternate)
343 (if (void? alternate)
344 `(if ,(tree-il->scheme test) ,(tree-il->scheme consequent))
345 `(if ,(tree-il->scheme test) ,(tree-il->scheme consequent) ,(tree-il->scheme alternate))))
347 ((<primitive-ref> name)
350 ((<lexical-ref> gensym)
353 ((<lexical-set> gensym exp)
354 `(set! ,gensym ,(tree-il->scheme exp)))
356 ((<module-ref> mod name public?)
357 `(,(if public? '@ '@@) ,mod ,name))
359 ((<module-set> mod name public? exp)
360 `(set! (,(if public? '@ '@@) ,mod ,name) ,(tree-il->scheme exp)))
362 ((<toplevel-ref> name)
365 ((<toplevel-set> name exp)
366 `(set! ,name ,(tree-il->scheme exp)))
368 ((<toplevel-define> name exp)
369 `(define ,name ,(tree-il->scheme exp)))
371 ((<lambda> meta body)
372 ;; fixme: put in docstring
373 (tree-il->scheme body))
375 ((<lambda-case> req opt rest kw inits gensyms body alternate)
377 ((and (not opt) (not kw) (not alternate))
378 `(lambda ,(if rest (apply cons* gensyms) gensyms)
379 ,(tree-il->scheme body)))
380 ((and (not opt) (not kw))
381 (let ((alt-expansion (tree-il->scheme alternate))
382 (formals (if rest (apply cons* gensyms) gensyms)))
383 (case (car alt-expansion)
385 `(case-lambda (,formals ,(tree-il->scheme body))
386 ,(cdr alt-expansion)))
388 `(case-lambda* (,formals ,(tree-il->scheme body))
389 ,(cdr alt-expansion)))
391 `(case-lambda (,formals ,(tree-il->scheme body))
392 ,@(cdr alt-expansion)))
394 `(case-lambda* (,formals ,(tree-il->scheme body))
395 ,@(cdr alt-expansion))))))
397 (let* ((alt-expansion (and alternate (tree-il->scheme alternate)))
399 (nopt (if opt (length opt) 0))
400 (restargs (if rest (list-ref gensyms (+ nreq nopt)) '()))
401 (reqargs (list-head gensyms nreq))
405 (list-head (list-tail gensyms nreq) nopt)
407 (list-head inits nopt))))
414 (list-tail inits nopt))
417 '(#:allow-other-keys)
420 (formals `(,@reqargs ,@optargs ,@kwargs . ,restargs)))
421 (if (not alt-expansion)
422 `(lambda* ,formals ,(tree-il->scheme body))
423 (case (car alt-expansion)
425 `(case-lambda* (,formals ,(tree-il->scheme body))
426 ,(cdr alt-expansion)))
427 ((case-lambda case-lambda*)
428 `(case-lambda* (,formals ,(tree-il->scheme body))
429 ,@(cdr alt-expansion)))))))))
432 (if (and (self-evaluating? exp) (not (vector? exp)))
437 `(begin ,@(map tree-il->scheme exps)))
439 ((<let> gensyms vals body)
440 `(let ,(map list gensyms (map tree-il->scheme vals)) ,(tree-il->scheme body)))
442 ((<letrec> in-order? gensyms vals body)
443 `(,(if in-order? 'letrec* 'letrec)
444 ,(map list gensyms (map tree-il->scheme vals)) ,(tree-il->scheme body)))
446 ((<fix> gensyms vals body)
447 ;; not a typo, we really do translate back to letrec. use letrec* since it
448 ;; doesn't matter, and the naive letrec* transformation does not require an
450 `(letrec* ,(map list gensyms (map tree-il->scheme vals)) ,(tree-il->scheme body)))
452 ((<let-values> exp body)
453 `(call-with-values (lambda () ,(tree-il->scheme exp))
454 ,(tree-il->scheme (make-lambda #f '() body))))
456 ((<dynwind> body winder unwinder)
457 `(dynamic-wind ,(tree-il->scheme winder)
458 (lambda () ,(tree-il->scheme body))
459 ,(tree-il->scheme unwinder)))
461 ((<dynlet> fluids vals body)
462 `(with-fluids ,(map list
463 (map tree-il->scheme fluids)
464 (map tree-il->scheme vals))
465 ,(tree-il->scheme body)))
468 `(fluid-ref ,(tree-il->scheme fluid)))
470 ((<dynset> fluid exp)
471 `(fluid-set! ,(tree-il->scheme fluid) ,(tree-il->scheme exp)))
473 ((<prompt> tag body handler)
475 ,(tree-il->scheme tag)
476 (lambda () ,(tree-il->scheme body))
477 ,(tree-il->scheme handler)))
480 ((<abort> tag args tail)
481 `(apply abort ,(tree-il->scheme tag) ,@(map tree-il->scheme args)
482 ,(tree-il->scheme tail)))))
485 (define (tree-il-fold leaf down up seed tree)
486 "Traverse TREE, calling LEAF on each leaf encountered, DOWN upon descent
487 into a sub-tree, and UP when leaving a sub-tree. Each of these procedures is
488 invoked as `(PROC TREE SEED)', where TREE is the sub-tree or leaf considered
489 and SEED is the current result, intially seeded with SEED.
491 This is an implementation of `foldts' as described by Andy Wingo in
492 ``Applications of fold to XML transformation''."
493 (let loop ((tree tree)
495 (if (or (null? tree) (pair? tree))
496 (fold loop result tree)
499 (up tree (loop exp (down tree result))))
501 (up tree (loop exp (down tree result))))
502 ((<toplevel-set> exp)
503 (up tree (loop exp (down tree result))))
504 ((<toplevel-define> exp)
505 (up tree (loop exp (down tree result))))
506 ((<conditional> test consequent alternate)
507 (up tree (loop alternate
509 (loop test (down tree result))))))
510 ((<application> proc args)
511 (up tree (loop (cons proc args) (down tree result))))
513 (up tree (loop exps (down tree result))))
515 (up tree (loop body (down tree result))))
516 ((<lambda-case> inits body alternate)
517 (up tree (if alternate
519 (loop body (loop inits (down tree result))))
520 (loop body (loop inits (down tree result))))))
524 (down tree result)))))
525 ((<letrec> vals body)
528 (down tree result)))))
532 (down tree result)))))
533 ((<let-values> exp body)
534 (up tree (loop body (loop exp (down tree result)))))
535 ((<dynwind> body winder unwinder)
536 (up tree (loop unwinder
538 (loop body (down tree result))))))
539 ((<dynlet> fluids vals body)
542 (loop fluids (down tree result))))))
544 (up tree (loop fluid (down tree result))))
545 ((<dynset> fluid exp)
546 (up tree (loop exp (loop fluid (down tree result)))))
547 ((<prompt> tag body handler)
549 (loop tag (loop body (loop handler
550 (down tree result))))))
551 ((<abort> tag args tail)
552 (up tree (loop tail (loop args (loop tag (down tree result))))))
554 (leaf tree result))))))
557 (define-syntax-rule (make-tree-il-folder seed ...)
558 (lambda (tree down up seed ...)
559 (define (fold-values proc exps seed ...)
562 (let-values (((seed ...) (proc (car exps) seed ...)))
563 (fold-values proc (cdr exps) seed ...))))
564 (let foldts ((tree tree) (seed seed) ...)
566 (((seed ...) (down tree seed ...))
570 (foldts exp seed ...))
572 (foldts exp seed ...))
573 ((<toplevel-set> exp)
574 (foldts exp seed ...))
575 ((<toplevel-define> exp)
576 (foldts exp seed ...))
577 ((<conditional> test consequent alternate)
578 (let*-values (((seed ...) (foldts test seed ...))
579 ((seed ...) (foldts consequent seed ...)))
580 (foldts alternate seed ...)))
581 ((<application> proc args)
582 (let-values (((seed ...) (foldts proc seed ...)))
583 (fold-values foldts args seed ...)))
585 (fold-values foldts exps seed ...))
587 (foldts body seed ...))
588 ((<lambda-case> inits body alternate)
589 (let-values (((seed ...) (fold-values foldts inits seed ...)))
591 (let-values (((seed ...) (foldts body seed ...)))
592 (foldts alternate seed ...))
593 (foldts body seed ...))))
595 (let*-values (((seed ...) (fold-values foldts vals seed ...)))
596 (foldts body seed ...)))
597 ((<letrec> vals body)
598 (let*-values (((seed ...) (fold-values foldts vals seed ...)))
599 (foldts body seed ...)))
601 (let*-values (((seed ...) (fold-values foldts vals seed ...)))
602 (foldts body seed ...)))
603 ((<let-values> exp body)
604 (let*-values (((seed ...) (foldts exp seed ...)))
605 (foldts body seed ...)))
606 ((<dynwind> body winder unwinder)
607 (let*-values (((seed ...) (foldts body seed ...))
608 ((seed ...) (foldts winder seed ...)))
609 (foldts unwinder seed ...)))
610 ((<dynlet> fluids vals body)
611 (let*-values (((seed ...) (fold-values foldts fluids seed ...))
612 ((seed ...) (fold-values foldts vals seed ...)))
613 (foldts body seed ...)))
615 (foldts fluid seed ...))
616 ((<dynset> fluid exp)
617 (let*-values (((seed ...) (foldts fluid seed ...)))
618 (foldts exp seed ...)))
619 ((<prompt> tag body handler)
620 (let*-values (((seed ...) (foldts tag seed ...))
621 ((seed ...) (foldts body seed ...)))
622 (foldts handler seed ...)))
623 ((<abort> tag args tail)
624 (let*-values (((seed ...) (foldts tag seed ...))
625 ((seed ...) (fold-values foldts args seed ...)))
626 (foldts tail seed ...)))
628 (values seed ...)))))
629 (up tree seed ...)))))
631 (define (post-order! f x)
634 ((<application> proc args)
635 (set! (application-proc x) (lp proc))
636 (set! (application-args x) (map lp args)))
638 ((<conditional> test consequent alternate)
639 (set! (conditional-test x) (lp test))
640 (set! (conditional-consequent x) (lp consequent))
641 (set! (conditional-alternate x) (lp alternate)))
643 ((<lexical-set> name gensym exp)
644 (set! (lexical-set-exp x) (lp exp)))
646 ((<module-set> mod name public? exp)
647 (set! (module-set-exp x) (lp exp)))
649 ((<toplevel-set> name exp)
650 (set! (toplevel-set-exp x) (lp exp)))
652 ((<toplevel-define> name exp)
653 (set! (toplevel-define-exp x) (lp exp)))
656 (set! (lambda-body x) (lp body)))
658 ((<lambda-case> inits body alternate)
659 (set! inits (map lp inits))
660 (set! (lambda-case-body x) (lp body))
662 (set! (lambda-case-alternate x) (lp alternate))))
665 (set! (sequence-exps x) (map lp exps)))
667 ((<let> gensyms vals body)
668 (set! (let-vals x) (map lp vals))
669 (set! (let-body x) (lp body)))
671 ((<letrec> gensyms vals body)
672 (set! (letrec-vals x) (map lp vals))
673 (set! (letrec-body x) (lp body)))
675 ((<fix> gensyms vals body)
676 (set! (fix-vals x) (map lp vals))
677 (set! (fix-body x) (lp body)))
679 ((<let-values> exp body)
680 (set! (let-values-exp x) (lp exp))
681 (set! (let-values-body x) (lp body)))
683 ((<dynwind> body winder unwinder)
684 (set! (dynwind-body x) (lp body))
685 (set! (dynwind-winder x) (lp winder))
686 (set! (dynwind-unwinder x) (lp unwinder)))
688 ((<dynlet> fluids vals body)
689 (set! (dynlet-fluids x) (map lp fluids))
690 (set! (dynlet-vals x) (map lp vals))
691 (set! (dynlet-body x) (lp body)))
694 (set! (dynref-fluid x) (lp fluid)))
696 ((<dynset> fluid exp)
697 (set! (dynset-fluid x) (lp fluid))
698 (set! (dynset-exp x) (lp exp)))
700 ((<prompt> tag body handler)
701 (set! (prompt-tag x) (lp tag))
702 (set! (prompt-body x) (lp body))
703 (set! (prompt-handler x) (lp handler)))
705 ((<abort> tag args tail)
706 (set! (abort-tag x) (lp tag))
707 (set! (abort-args x) (map lp args))
708 (set! (abort-tail x) (lp tail)))
714 (define (pre-order! f x)
716 (let ((x (or (f x) x)))
718 ((<application> proc args)
719 (set! (application-proc x) (lp proc))
720 (set! (application-args x) (map lp args)))
722 ((<conditional> test consequent alternate)
723 (set! (conditional-test x) (lp test))
724 (set! (conditional-consequent x) (lp consequent))
725 (set! (conditional-alternate x) (lp alternate)))
728 (set! (lexical-set-exp x) (lp exp)))
731 (set! (module-set-exp x) (lp exp)))
733 ((<toplevel-set> exp)
734 (set! (toplevel-set-exp x) (lp exp)))
736 ((<toplevel-define> exp)
737 (set! (toplevel-define-exp x) (lp exp)))
740 (set! (lambda-body x) (lp body)))
742 ((<lambda-case> inits body alternate)
743 (set! inits (map lp inits))
744 (set! (lambda-case-body x) (lp body))
745 (if alternate (set! (lambda-case-alternate x) (lp alternate))))
748 (set! (sequence-exps x) (map lp exps)))
751 (set! (let-vals x) (map lp vals))
752 (set! (let-body x) (lp body)))
754 ((<letrec> vals body)
755 (set! (letrec-vals x) (map lp vals))
756 (set! (letrec-body x) (lp body)))
759 (set! (fix-vals x) (map lp vals))
760 (set! (fix-body x) (lp body)))
762 ((<let-values> exp body)
763 (set! (let-values-exp x) (lp exp))
764 (set! (let-values-body x) (lp body)))
766 ((<dynwind> body winder unwinder)
767 (set! (dynwind-body x) (lp body))
768 (set! (dynwind-winder x) (lp winder))
769 (set! (dynwind-unwinder x) (lp unwinder)))
771 ((<dynlet> fluids vals body)
772 (set! (dynlet-fluids x) (map lp fluids))
773 (set! (dynlet-vals x) (map lp vals))
774 (set! (dynlet-body x) (lp body)))
777 (set! (dynref-fluid x) (lp fluid)))
779 ((<dynset> fluid exp)
780 (set! (dynset-fluid x) (lp fluid))
781 (set! (dynset-exp x) (lp exp)))
783 ((<prompt> tag body handler)
784 (set! (prompt-tag x) (lp tag))
785 (set! (prompt-body x) (lp body))
786 (set! (prompt-handler x) (lp handler)))
788 ((<abort> tag args tail)
789 (set! (abort-tag x) (lp tag))
790 (set! (abort-args x) (map lp args))
791 (set! (abort-tail x) (lp tail)))