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19113f1c | 1 | ;;;; Copyright (C) 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. |
d26a26f6 | 2 | ;;;; |
811d10f5 AW |
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 | |
53befeb7 | 6 | ;;;; version 3 of the License, or (at your option) any later version. |
d26a26f6 | 7 | ;;;; |
811d10f5 AW |
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. | |
d26a26f6 | 12 | ;;;; |
811d10f5 AW |
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 | |
d26a26f6 | 16 | ;;;; |
811d10f5 AW |
17 | \f |
18 | ||
19 | (define-module (language tree-il) | |
f4aa0f10 | 20 | #:use-module (srfi srfi-1) |
4dcd8499 | 21 | #:use-module (srfi srfi-11) |
99b4da8f | 22 | #:use-module (ice-9 match) |
811d10f5 | 23 | #:use-module (system base syntax) |
9efc833d | 24 | #:export (tree-il-src |
811d10f5 | 25 | |
cf10678f | 26 | <void> void? make-void void-src |
81fd3152 | 27 | <const> const? make-const const-src const-exp |
cb28c085 AW |
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 | |
b6d93b11 | 36 | <conditional> conditional? make-conditional conditional-src conditional-test conditional-consequent conditional-alternate |
7081d4f9 | 37 | <call> call? make-call call-src call-proc call-args |
a881a4ae | 38 | <primcall> primcall? make-primcall primcall-src primcall-name primcall-args |
d019ef92 | 39 | <seq> seq? make-seq seq-src seq-head seq-tail |
8a4ca0ea AW |
40 | <lambda> lambda? make-lambda lambda-src lambda-meta lambda-body |
41 | <lambda-case> lambda-case? make-lambda-case lambda-case-src | |
b0c8c187 | 42 | lambda-case-req lambda-case-opt lambda-case-rest lambda-case-kw |
93f63467 | 43 | lambda-case-inits lambda-case-gensyms |
3a88cb3b | 44 | lambda-case-body lambda-case-alternate |
93f63467 | 45 | <let> let? make-let let-src let-names let-gensyms let-vals let-body |
fb6e61ca | 46 | <letrec> letrec? make-letrec letrec-src letrec-in-order? letrec-names letrec-gensyms letrec-vals letrec-body |
93f63467 | 47 | <fix> fix? make-fix fix-src fix-names fix-gensyms fix-vals fix-body |
8a4ca0ea | 48 | <let-values> let-values? make-let-values let-values-src let-values-exp let-values-body |
07a0c7d5 | 49 | <prompt> prompt? make-prompt prompt-src prompt-tag prompt-body prompt-handler |
2d026f04 | 50 | <abort> abort? make-abort abort-src abort-tag abort-args abort-tail |
f4aa0f10 | 51 | |
6fc3eae4 AW |
52 | list->seq |
53 | ||
9efc833d AW |
54 | parse-tree-il |
55 | unparse-tree-il | |
cb28c085 AW |
56 | tree-il->scheme |
57 | ||
f4aa0f10 | 58 | tree-il-fold |
4dcd8499 | 59 | make-tree-il-folder |
403d78f9 | 60 | post-order |
25450a0d | 61 | pre-order |
1fb39dc5 AW |
62 | |
63 | tree-il=? | |
64 | tree-il-hash)) | |
811d10f5 | 65 | |
4ffa8275 | 66 | (define (print-tree-il exp port) |
7cd6d77c | 67 | (format port "#<tree-il ~S>" (unparse-tree-il exp))) |
4ffa8275 | 68 | |
f7b61b39 AW |
69 | (define-syntax borrow-core-vtables |
70 | (lambda (x) | |
71 | (syntax-case x () | |
72 | ((_) | |
73 | (let lp ((n 0) (out '())) | |
74 | (if (< n (vector-length %expanded-vtables)) | |
75 | (lp (1+ n) | |
76 | (let* ((vtable (vector-ref %expanded-vtables n)) | |
77 | (stem (struct-ref vtable (+ vtable-offset-user 0))) | |
78 | (fields (struct-ref vtable (+ vtable-offset-user 2))) | |
79 | (sfields (map | |
80 | (lambda (f) (datum->syntax x f)) | |
81 | fields)) | |
82 | (type (datum->syntax x (symbol-append '< stem '>))) | |
83 | (ctor (datum->syntax x (symbol-append 'make- stem))) | |
84 | (pred (datum->syntax x (symbol-append stem '?)))) | |
85 | (let lp ((n 0) (fields fields) | |
86 | (out (cons* | |
87 | #`(define (#,ctor #,@sfields) | |
88 | (make-struct #,type 0 #,@sfields)) | |
89 | #`(define (#,pred x) | |
90 | (and (struct? x) | |
91 | (eq? (struct-vtable x) #,type))) | |
4ffa8275 AW |
92 | #`(struct-set! #,type vtable-index-printer |
93 | print-tree-il) | |
f7b61b39 AW |
94 | #`(define #,type |
95 | (vector-ref %expanded-vtables #,n)) | |
96 | out))) | |
97 | (if (null? fields) | |
98 | out | |
99 | (lp (1+ n) | |
100 | (cdr fields) | |
101 | (let ((acc (datum->syntax | |
102 | x (symbol-append stem '- (car fields))))) | |
103 | (cons #`(define #,acc | |
104 | (make-procedure-with-setter | |
105 | (lambda (x) (struct-ref x #,n)) | |
106 | (lambda (x v) (struct-set! x #,n v)))) | |
107 | out))))))) | |
108 | #`(begin #,@(reverse out)))))))) | |
109 | ||
110 | (borrow-core-vtables) | |
111 | ||
112 | ;; (<void>) | |
113 | ;; (<const> exp) | |
114 | ;; (<primitive-ref> name) | |
115 | ;; (<lexical-ref> name gensym) | |
116 | ;; (<lexical-set> name gensym exp) | |
117 | ;; (<module-ref> mod name public?) | |
118 | ;; (<module-set> mod name public? exp) | |
119 | ;; (<toplevel-ref> name) | |
120 | ;; (<toplevel-set> name exp) | |
121 | ;; (<toplevel-define> name exp) | |
122 | ;; (<conditional> test consequent alternate) | |
7081d4f9 | 123 | ;; (<call> proc args) |
a881a4ae | 124 | ;; (<primcall> name args) |
6fc3eae4 | 125 | ;; (<seq> head tail) |
f7b61b39 AW |
126 | ;; (<lambda> meta body) |
127 | ;; (<lambda-case> req opt rest kw inits gensyms body alternate) | |
128 | ;; (<let> names gensyms vals body) | |
fb6e61ca | 129 | ;; (<letrec> in-order? names gensyms vals body) |
f7b61b39 | 130 | |
4ffa8275 | 131 | (define-type (<tree-il> #:common-slots (src) #:printer print-tree-il) |
93f63467 | 132 | (<fix> names gensyms vals body) |
1c297a38 | 133 | (<let-values> exp body) |
07a0c7d5 | 134 | (<prompt> tag body handler) |
2d026f04 | 135 | (<abort> tag args tail)) |
d26a26f6 | 136 | |
811d10f5 AW |
137 | \f |
138 | ||
6fc3eae4 AW |
139 | ;; A helper. |
140 | (define (list->seq loc exps) | |
141 | (if (null? (cdr exps)) | |
142 | (car exps) | |
143 | (make-seq loc (car exps) (list->seq #f (cdr exps))))) | |
144 | ||
145 | \f | |
146 | ||
811d10f5 AW |
147 | (define (location x) |
148 | (and (pair? x) | |
149 | (let ((props (source-properties x))) | |
81fd3152 | 150 | (and (pair? props) props)))) |
811d10f5 | 151 | |
ce09ee19 | 152 | (define (parse-tree-il exp) |
811d10f5 | 153 | (let ((loc (location exp)) |
ce09ee19 | 154 | (retrans (lambda (x) (parse-tree-il x)))) |
f852e05e AW |
155 | (match exp |
156 | (('void) | |
cf10678f AW |
157 | (make-void loc)) |
158 | ||
f852e05e | 159 | (('call proc . args) |
7081d4f9 | 160 | (make-call loc (retrans proc) (map retrans args))) |
811d10f5 | 161 | |
f852e05e | 162 | (('primcall name . args) |
a881a4ae AW |
163 | (make-primcall loc name (map retrans args))) |
164 | ||
f852e05e | 165 | (('if test consequent alternate) |
b6d93b11 | 166 | (make-conditional loc (retrans test) (retrans consequent) (retrans alternate))) |
811d10f5 | 167 | |
f852e05e | 168 | (('primitive (and name (? symbol?))) |
811d10f5 AW |
169 | (make-primitive-ref loc name)) |
170 | ||
f852e05e | 171 | (('lexical (and name (? symbol?))) |
811d10f5 AW |
172 | (make-lexical-ref loc name name)) |
173 | ||
f852e05e | 174 | (('lexical (and name (? symbol?)) (and sym (? symbol?))) |
811d10f5 AW |
175 | (make-lexical-ref loc name sym)) |
176 | ||
f852e05e | 177 | (('set! ('lexical (and name (? symbol?))) exp) |
5c27902e AW |
178 | (make-lexical-set loc name name (retrans exp))) |
179 | ||
f852e05e | 180 | (('set! ('lexical (and name (? symbol?)) (and sym (? symbol?))) exp) |
811d10f5 AW |
181 | (make-lexical-set loc name sym (retrans exp))) |
182 | ||
f852e05e | 183 | (('@ ((and mod (? symbol?)) ...) (and name (? symbol?))) |
811d10f5 AW |
184 | (make-module-ref loc mod name #t)) |
185 | ||
f852e05e | 186 | (('set! ('@ ((and mod (? symbol?)) ...) (and name (? symbol?))) exp) |
811d10f5 AW |
187 | (make-module-set loc mod name #t (retrans exp))) |
188 | ||
f852e05e | 189 | (('@@ ((and mod (? symbol?)) ...) (and name (? symbol?))) |
811d10f5 AW |
190 | (make-module-ref loc mod name #f)) |
191 | ||
f852e05e | 192 | (('set! ('@@ ((and mod (? symbol?)) ...) (and name (? symbol?))) exp) |
811d10f5 AW |
193 | (make-module-set loc mod name #f (retrans exp))) |
194 | ||
f852e05e | 195 | (('toplevel (and name (? symbol?))) |
811d10f5 AW |
196 | (make-toplevel-ref loc name)) |
197 | ||
f852e05e | 198 | (('set! ('toplevel (and name (? symbol?))) exp) |
811d10f5 AW |
199 | (make-toplevel-set loc name (retrans exp))) |
200 | ||
f852e05e | 201 | (('define (and name (? symbol?)) exp) |
811d10f5 AW |
202 | (make-toplevel-define loc name (retrans exp))) |
203 | ||
f852e05e | 204 | (('lambda meta body) |
8a4ca0ea | 205 | (make-lambda loc meta (retrans body))) |
811d10f5 | 206 | |
f852e05e | 207 | (('lambda-case ((req opt rest kw inits gensyms) body) alternate) |
d26a26f6 | 208 | (make-lambda-case loc req opt rest kw |
93f63467 | 209 | (map retrans inits) gensyms |
8a4ca0ea | 210 | (retrans body) |
3a88cb3b | 211 | (and=> alternate retrans))) |
811d10f5 | 212 | |
f852e05e | 213 | (('lambda-case ((req opt rest kw inits gensyms) body)) |
b0c8c187 | 214 | (make-lambda-case loc req opt rest kw |
93f63467 | 215 | (map retrans inits) gensyms |
7e01997e AW |
216 | (retrans body) |
217 | #f)) | |
218 | ||
f852e05e | 219 | (('const exp) |
811d10f5 AW |
220 | (make-const loc exp)) |
221 | ||
f852e05e | 222 | (('seq head tail) |
6fc3eae4 AW |
223 | (make-seq loc (retrans head) (retrans tail))) |
224 | ||
225 | ;; Convenience. | |
f852e05e | 226 | (('begin . exps) |
6fc3eae4 | 227 | (list->seq loc (map retrans exps))) |
811d10f5 | 228 | |
f852e05e | 229 | (('let names gensyms vals body) |
93f63467 | 230 | (make-let loc names gensyms (map retrans vals) (retrans body))) |
f4aa8d53 | 231 | |
f852e05e | 232 | (('letrec names gensyms vals body) |
fb6e61ca AW |
233 | (make-letrec loc #f names gensyms (map retrans vals) (retrans body))) |
234 | ||
f852e05e | 235 | (('letrec* names gensyms vals body) |
fb6e61ca | 236 | (make-letrec loc #t names gensyms (map retrans vals) (retrans body))) |
811d10f5 | 237 | |
f852e05e | 238 | (('fix names gensyms vals body) |
93f63467 | 239 | (make-fix loc names gensyms (map retrans vals) (retrans body))) |
c21c89b1 | 240 | |
f852e05e | 241 | (('let-values exp body) |
8a4ca0ea | 242 | (make-let-values loc (retrans exp) (retrans body))) |
811d10f5 | 243 | |
f852e05e | 244 | (('prompt tag body handler) |
07a0c7d5 | 245 | (make-prompt loc (retrans tag) (retrans body) (retrans handler))) |
f852e05e AW |
246 | |
247 | (('abort tag args tail) | |
2d026f04 | 248 | (make-abort loc (retrans tag) (map retrans args) (retrans tail))) |
1c297a38 | 249 | |
811d10f5 AW |
250 | (else |
251 | (error "unrecognized tree-il" exp))))) | |
252 | ||
253 | (define (unparse-tree-il tree-il) | |
98f778ea AW |
254 | (match tree-il |
255 | (($ <void> src) | |
cf10678f AW |
256 | '(void)) |
257 | ||
98f778ea | 258 | (($ <call> src proc args) |
7081d4f9 | 259 | `(call ,(unparse-tree-il proc) ,@(map unparse-tree-il args))) |
811d10f5 | 260 | |
98f778ea | 261 | (($ <primcall> src name args) |
a881a4ae AW |
262 | `(primcall ,name ,@(map unparse-tree-il args))) |
263 | ||
98f778ea AW |
264 | (($ <conditional> src test consequent alternate) |
265 | `(if ,(unparse-tree-il test) | |
266 | ,(unparse-tree-il consequent) | |
267 | ,(unparse-tree-il alternate))) | |
811d10f5 | 268 | |
98f778ea | 269 | (($ <primitive-ref> src name) |
811d10f5 AW |
270 | `(primitive ,name)) |
271 | ||
98f778ea | 272 | (($ <lexical-ref> src name gensym) |
811d10f5 AW |
273 | `(lexical ,name ,gensym)) |
274 | ||
98f778ea | 275 | (($ <lexical-set> src name gensym exp) |
811d10f5 AW |
276 | `(set! (lexical ,name ,gensym) ,(unparse-tree-il exp))) |
277 | ||
98f778ea | 278 | (($ <module-ref> src mod name public?) |
811d10f5 AW |
279 | `(,(if public? '@ '@@) ,mod ,name)) |
280 | ||
98f778ea | 281 | (($ <module-set> src mod name public? exp) |
811d10f5 AW |
282 | `(set! (,(if public? '@ '@@) ,mod ,name) ,(unparse-tree-il exp))) |
283 | ||
98f778ea | 284 | (($ <toplevel-ref> src name) |
811d10f5 AW |
285 | `(toplevel ,name)) |
286 | ||
98f778ea | 287 | (($ <toplevel-set> src name exp) |
811d10f5 AW |
288 | `(set! (toplevel ,name) ,(unparse-tree-il exp))) |
289 | ||
98f778ea | 290 | (($ <toplevel-define> src name exp) |
811d10f5 AW |
291 | `(define ,name ,(unparse-tree-il exp))) |
292 | ||
98f778ea | 293 | (($ <lambda> src meta body) |
19113f1c AW |
294 | (if body |
295 | `(lambda ,meta ,(unparse-tree-il body)) | |
296 | `(lambda ,meta (lambda-case)))) | |
8a4ca0ea | 297 | |
98f778ea | 298 | (($ <lambda-case> src req opt rest kw inits gensyms body alternate) |
93f63467 | 299 | `(lambda-case ((,req ,opt ,rest ,kw ,(map unparse-tree-il inits) ,gensyms) |
8a4ca0ea | 300 | ,(unparse-tree-il body)) |
3a88cb3b | 301 | . ,(if alternate (list (unparse-tree-il alternate)) '()))) |
811d10f5 | 302 | |
98f778ea | 303 | (($ <const> src exp) |
811d10f5 AW |
304 | `(const ,exp)) |
305 | ||
98f778ea | 306 | (($ <seq> src head tail) |
6fc3eae4 AW |
307 | `(seq ,(unparse-tree-il head) ,(unparse-tree-il tail))) |
308 | ||
98f778ea | 309 | (($ <let> src names gensyms vals body) |
93f63467 | 310 | `(let ,names ,gensyms ,(map unparse-tree-il vals) ,(unparse-tree-il body))) |
811d10f5 | 311 | |
98f778ea | 312 | (($ <letrec> src in-order? names gensyms vals body) |
fb6e61ca AW |
313 | `(,(if in-order? 'letrec* 'letrec) ,names ,gensyms |
314 | ,(map unparse-tree-il vals) ,(unparse-tree-il body))) | |
f4aa8d53 | 315 | |
98f778ea | 316 | (($ <fix> src names gensyms vals body) |
93f63467 | 317 | `(fix ,names ,gensyms ,(map unparse-tree-il vals) ,(unparse-tree-il body))) |
c21c89b1 | 318 | |
98f778ea | 319 | (($ <let-values> src exp body) |
1c297a38 AW |
320 | `(let-values ,(unparse-tree-il exp) ,(unparse-tree-il body))) |
321 | ||
98f778ea AW |
322 | (($ <prompt> src tag body handler) |
323 | `(prompt ,(unparse-tree-il tag) | |
324 | ,(unparse-tree-il body) | |
325 | ,(unparse-tree-il handler))) | |
d26a26f6 | 326 | |
98f778ea | 327 | (($ <abort> src tag args tail) |
2d026f04 AW |
328 | `(abort ,(unparse-tree-il tag) ,(map unparse-tree-il args) |
329 | ,(unparse-tree-il tail))))) | |
811d10f5 | 330 | |
72ee0ef7 MW |
331 | (define* (tree-il->scheme e #:optional (env #f) (opts '())) |
332 | (values ((@ (language scheme decompile-tree-il) | |
333 | decompile-tree-il) | |
334 | e env opts))) | |
cb28c085 | 335 | |
f4aa0f10 | 336 | \f |
0c65f52c AW |
337 | (define-syntax-rule (make-tree-il-folder seed ...) |
338 | (lambda (tree down up seed ...) | |
339 | (define (fold-values proc exps seed ...) | |
340 | (if (null? exps) | |
341 | (values seed ...) | |
342 | (let-values (((seed ...) (proc (car exps) seed ...))) | |
343 | (fold-values proc (cdr exps) seed ...)))) | |
344 | (let foldts ((tree tree) (seed seed) ...) | |
345 | (let*-values | |
346 | (((seed ...) (down tree seed ...)) | |
347 | ((seed ...) | |
b34b66b3 AW |
348 | (match tree |
349 | (($ <lexical-set> src name gensym exp) | |
0c65f52c | 350 | (foldts exp seed ...)) |
b34b66b3 | 351 | (($ <module-set> src mod name public? exp) |
0c65f52c | 352 | (foldts exp seed ...)) |
b34b66b3 | 353 | (($ <toplevel-set> src name exp) |
0c65f52c | 354 | (foldts exp seed ...)) |
b34b66b3 | 355 | (($ <toplevel-define> src name exp) |
0c65f52c | 356 | (foldts exp seed ...)) |
b34b66b3 | 357 | (($ <conditional> src test consequent alternate) |
0c65f52c AW |
358 | (let*-values (((seed ...) (foldts test seed ...)) |
359 | ((seed ...) (foldts consequent seed ...))) | |
360 | (foldts alternate seed ...))) | |
b34b66b3 | 361 | (($ <call> src proc args) |
0c65f52c AW |
362 | (let-values (((seed ...) (foldts proc seed ...))) |
363 | (fold-values foldts args seed ...))) | |
b34b66b3 | 364 | (($ <primcall> src name args) |
ca128245 | 365 | (fold-values foldts args seed ...)) |
b34b66b3 | 366 | (($ <seq> src head tail) |
ca128245 AW |
367 | (let-values (((seed ...) (foldts head seed ...))) |
368 | (foldts tail seed ...))) | |
b34b66b3 | 369 | (($ <lambda> src meta body) |
19113f1c AW |
370 | (if body |
371 | (foldts body seed ...) | |
372 | (values seed ...))) | |
b34b66b3 AW |
373 | (($ <lambda-case> src req opt rest kw inits gensyms body |
374 | alternate) | |
0c65f52c AW |
375 | (let-values (((seed ...) (fold-values foldts inits seed ...))) |
376 | (if alternate | |
377 | (let-values (((seed ...) (foldts body seed ...))) | |
378 | (foldts alternate seed ...)) | |
379 | (foldts body seed ...)))) | |
b34b66b3 | 380 | (($ <let> src names gensyms vals body) |
0c65f52c AW |
381 | (let*-values (((seed ...) (fold-values foldts vals seed ...))) |
382 | (foldts body seed ...))) | |
b34b66b3 | 383 | (($ <letrec> src in-order? names gensyms vals body) |
0c65f52c AW |
384 | (let*-values (((seed ...) (fold-values foldts vals seed ...))) |
385 | (foldts body seed ...))) | |
b34b66b3 | 386 | (($ <fix> src names gensyms vals body) |
0c65f52c AW |
387 | (let*-values (((seed ...) (fold-values foldts vals seed ...))) |
388 | (foldts body seed ...))) | |
b34b66b3 | 389 | (($ <let-values> src exp body) |
0c65f52c AW |
390 | (let*-values (((seed ...) (foldts exp seed ...))) |
391 | (foldts body seed ...))) | |
b34b66b3 | 392 | (($ <prompt> src tag body handler) |
0c65f52c AW |
393 | (let*-values (((seed ...) (foldts tag seed ...)) |
394 | ((seed ...) (foldts body seed ...))) | |
395 | (foldts handler seed ...))) | |
b34b66b3 | 396 | (($ <abort> src tag args tail) |
0c65f52c AW |
397 | (let*-values (((seed ...) (foldts tag seed ...)) |
398 | ((seed ...) (fold-values foldts args seed ...))) | |
399 | (foldts tail seed ...))) | |
b34b66b3 | 400 | (_ |
0c65f52c AW |
401 | (values seed ...))))) |
402 | (up tree seed ...))))) | |
4dcd8499 | 403 | |
007f671a AW |
404 | (define (tree-il-fold down up seed tree) |
405 | "Traverse TREE, calling DOWN before visiting a sub-tree, and UP when | |
406 | after visiting it. Each of these procedures is invoked as `(PROC TREE | |
407 | SEED)', where TREE is the sub-tree considered and SEED is the current | |
408 | result, intially seeded with SEED. | |
409 | ||
410 | This is an implementation of `foldts' as described by Andy Wingo in | |
411 | ``Applications of fold to XML transformation''." | |
412 | ;; Multi-valued fold naturally puts the seeds at the end, whereas | |
413 | ;; normal fold puts the traversable at the end. Adapt to the expected | |
414 | ;; argument order. | |
415 | ((make-tree-il-folder tree) tree down up seed)) | |
416 | ||
403d78f9 | 417 | (define (pre-post-order pre post x) |
cb28c085 | 418 | (let lp ((x x)) |
403d78f9 | 419 | (post |
99b4da8f AW |
420 | (match (pre x) |
421 | (($ <void> src) | |
403d78f9 | 422 | (make-void src)) |
cb28c085 | 423 | |
99b4da8f | 424 | (($ <const> src exp) |
403d78f9 | 425 | (make-const src exp)) |
a881a4ae | 426 | |
99b4da8f | 427 | (($ <primitive-ref> src name) |
403d78f9 | 428 | (make-primitive-ref src name)) |
d26a26f6 | 429 | |
99b4da8f | 430 | (($ <lexical-ref> src name gensym) |
403d78f9 | 431 | (make-lexical-ref src name gensym)) |
d26a26f6 | 432 | |
99b4da8f | 433 | (($ <lexical-set> src name gensym exp) |
403d78f9 | 434 | (make-lexical-set src name gensym (lp exp))) |
d26a26f6 | 435 | |
99b4da8f | 436 | (($ <module-ref> src mod name public?) |
403d78f9 | 437 | (make-module-ref src mod name public?)) |
d26a26f6 | 438 | |
99b4da8f | 439 | (($ <module-set> src mod name public? exp) |
403d78f9 | 440 | (make-module-set src mod name public? (lp exp))) |
d26a26f6 | 441 | |
99b4da8f | 442 | (($ <toplevel-ref> src name) |
403d78f9 | 443 | (make-toplevel-ref src name)) |
d26a26f6 | 444 | |
99b4da8f | 445 | (($ <toplevel-set> src name exp) |
403d78f9 | 446 | (make-toplevel-set src name (lp exp))) |
d26a26f6 | 447 | |
99b4da8f | 448 | (($ <toplevel-define> src name exp) |
403d78f9 AW |
449 | (make-toplevel-define src name (lp exp))) |
450 | ||
99b4da8f | 451 | (($ <conditional> src test consequent alternate) |
403d78f9 AW |
452 | (make-conditional src (lp test) (lp consequent) (lp alternate))) |
453 | ||
99b4da8f | 454 | (($ <call> src proc args) |
403d78f9 AW |
455 | (make-call src (lp proc) (map lp args))) |
456 | ||
99b4da8f | 457 | (($ <primcall> src name args) |
403d78f9 AW |
458 | (make-primcall src name (map lp args))) |
459 | ||
99b4da8f | 460 | (($ <seq> src head tail) |
403d78f9 | 461 | (make-seq src (lp head) (lp tail))) |
6fc3eae4 | 462 | |
99b4da8f | 463 | (($ <lambda> src meta body) |
403d78f9 AW |
464 | (make-lambda src meta (and body (lp body)))) |
465 | ||
99b4da8f | 466 | (($ <lambda-case> src req opt rest kw inits gensyms body alternate) |
403d78f9 AW |
467 | (make-lambda-case src req opt rest kw (map lp inits) gensyms (lp body) |
468 | (and alternate (lp alternate)))) | |
469 | ||
99b4da8f | 470 | (($ <let> src names gensyms vals body) |
403d78f9 AW |
471 | (make-let src names gensyms (map lp vals) (lp body))) |
472 | ||
99b4da8f | 473 | (($ <letrec> src in-order? names gensyms vals body) |
403d78f9 AW |
474 | (make-letrec src in-order? names gensyms (map lp vals) (lp body))) |
475 | ||
99b4da8f | 476 | (($ <fix> src names gensyms vals body) |
403d78f9 AW |
477 | (make-fix src names gensyms (map lp vals) (lp body))) |
478 | ||
99b4da8f | 479 | (($ <let-values> src exp body) |
403d78f9 AW |
480 | (make-let-values src (lp exp) (lp body))) |
481 | ||
99b4da8f | 482 | (($ <prompt> src tag body handler) |
403d78f9 AW |
483 | (make-prompt src (lp tag) (lp body) (lp handler))) |
484 | ||
99b4da8f | 485 | (($ <abort> src tag args tail) |
403d78f9 AW |
486 | (make-abort src (lp tag) (map lp args) (lp tail))))))) |
487 | ||
488 | (define (post-order f x) | |
489 | (pre-post-order (lambda (x) x) f x)) | |
cb28c085 | 490 | |
25450a0d AW |
491 | (define (pre-order f x) |
492 | (pre-post-order f (lambda (x) x) x)) | |
1fb39dc5 AW |
493 | |
494 | ;; FIXME: We should have a better primitive than this. | |
495 | (define (struct-nfields x) | |
496 | (/ (string-length (symbol->string (struct-layout x))) 2)) | |
497 | ||
498 | (define (tree-il=? a b) | |
499 | (cond | |
500 | ((struct? a) | |
501 | (and (struct? b) | |
502 | (eq? (struct-vtable a) (struct-vtable b)) | |
503 | ;; Assume that all structs are tree-il, so we skip over the | |
504 | ;; src slot. | |
505 | (let lp ((n (1- (struct-nfields a)))) | |
506 | (or (zero? n) | |
507 | (and (tree-il=? (struct-ref a n) (struct-ref b n)) | |
508 | (lp (1- n))))))) | |
509 | ((pair? a) | |
510 | (and (pair? b) | |
511 | (tree-il=? (car a) (car b)) | |
512 | (tree-il=? (cdr a) (cdr b)))) | |
513 | (else | |
514 | (equal? a b)))) | |
515 | ||
516 | (define-syntax hash-bits | |
517 | (make-variable-transformer | |
518 | (lambda (x) | |
519 | (syntax-case x () | |
520 | (var | |
521 | (identifier? #'var) | |
522 | (logcount most-positive-fixnum)))))) | |
523 | ||
524 | (define (tree-il-hash exp) | |
525 | (let ((hash-depth 4) | |
526 | (hash-width 3)) | |
527 | (define (hash-exp exp depth) | |
528 | (define (rotate x bits) | |
529 | (logior (ash x (- bits)) | |
530 | (ash (logand x (1- (ash 1 bits))) (- hash-bits bits)))) | |
531 | (define (mix h1 h2) | |
532 | (logxor h1 (rotate h2 8))) | |
533 | (define (hash-struct s) | |
534 | (let ((len (struct-nfields s)) | |
535 | (h (hashq (struct-vtable s) most-positive-fixnum))) | |
536 | (if (zero? depth) | |
537 | h | |
538 | (let lp ((i (max (- len hash-width) 1)) (h h)) | |
539 | (if (< i len) | |
540 | (lp (1+ i) (mix (hash-exp (struct-ref s i) (1+ depth)) h)) | |
541 | h))))) | |
542 | (define (hash-list l) | |
543 | (let ((h (hashq 'list most-positive-fixnum))) | |
544 | (if (zero? depth) | |
545 | h | |
546 | (let lp ((l l) (width 0) (h h)) | |
547 | (if (< width hash-width) | |
548 | (lp (cdr l) (1+ width) | |
549 | (mix (hash-exp (car l) (1+ depth)) h)) | |
550 | h))))) | |
551 | (cond | |
552 | ((struct? exp) (hash-struct exp)) | |
553 | ((list? exp) (hash-list exp)) | |
554 | (else (hash exp most-positive-fixnum)))) | |
555 | ||
556 | (hash-exp exp 0))) |