summaryrefslogtreecommitdiff
path: root/src/elab_print.sml
blob: bb1c2a85f9f8cd5315625a8d2ab7195934256732 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
(* Copyright (c) 2008, Adam Chlipala
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - The names of contributors may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *)

(* Pretty-printing elaborated Ur/Web *)

structure ElabPrint :> ELAB_PRINT = struct

open Print.PD
open Print

open Elab

structure E = ElabEnv

val debug = ref false

fun p_kind' par (k, _) =
    case k of
        KType => string "Type"
      | KArrow (k1, k2) => parenIf par (box [p_kind' true k1,
                                             space,
                                             string "->",
                                             space,
                                             p_kind k2])
      | KName => string "Name"
      | KRecord k => box [string "{", p_kind k, string "}"]
      | KUnit => string "Unit"
      | KTuple ks => box [string "(",
                          p_list_sep (box [space, string "*", space]) p_kind ks,
                          string ")"]

      | KError => string "<ERROR>"
      | KUnif (_, _, ref (SOME k)) => p_kind' par k
      | KUnif (_, s, _) => string ("<UNIF:" ^ s ^ ">")

and p_kind k = p_kind' false k

fun p_explicitness e =
    case e of
        Explicit => string "::"
      | Implicit => string ":::"

fun p_con' par env (c, _) =
    case c of
        TFun (t1, t2) => parenIf par (box [p_con' true env t1,
                                           space,
                                           string "->",
                                           space,
                                           p_con env t2])
      | TCFun (e, x, k, c) => parenIf par (box [string x,
                                                space,
                                                p_explicitness e,
                                                space,
                                                p_kind k,
                                                space,
                                                string "->",
                                                space,
                                                p_con (E.pushCRel env x k) c])
      | TDisjoint (_, c1, c2, c3) => parenIf par (box [p_con env c1,
                                                       space,
                                                       string "~",
                                                       space,
                                                       p_con env c2,
                                                       space,
                                                       string "->",
                                                       space,
                                                       p_con env c3])
      | TRecord (CRecord (_, xcs), _) => box [string "{",
                                              p_list (fn (x, c) =>
                                                         box [p_name env x,
                                                              space,
                                                              string ":",
                                                              space,
                                                              p_con env c]) xcs,
                                              string "}"]
      | TRecord c => box [string "$",
                          p_con' true env c]

      | CRel n =>
        ((if !debug then
              string (#1 (E.lookupCRel env n) ^ "_" ^ Int.toString n)
          else
              string (#1 (E.lookupCRel env n)))
         handle E.UnboundRel _ => string ("UNBOUND_REL" ^ Int.toString n))
      | CNamed n =>
        ((if !debug then
              string (#1 (E.lookupCNamed env n) ^ "__" ^ Int.toString n)
          else
              string (#1 (E.lookupCNamed env n)))
         handle E.UnboundNamed _ => string ("UNBOUND_NAMED" ^ Int.toString n))
      | CModProj (m1, ms, x) =>
        let
            val m1x = #1 (E.lookupStrNamed env m1)
                handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1
               
            val m1s = if !debug then
                          m1x ^ "__" ^ Int.toString m1
                      else
                          m1x
        in
            p_list_sep (string ".") string (m1x :: ms @ [x])
        end 

      | CApp (c1, c2) => parenIf par (box [p_con env c1,
                                           space,
                                           p_con' true env c2])
      | CAbs (x, k, c) => parenIf true (box [string "fn",
                                             space,
                                             string x,
                                             space,
                                             string "::",
                                             space,
                                             p_kind k,
                                             space,
                                             string "=>",
                                             space,
                                             p_con (E.pushCRel env x k) c])
      | CDisjoint (c1, c2, c3) => parenIf par (box [p_con env c1,
                                                    space,
                                                    string "~",
                                                    space,
                                                    p_con env c2,
                                                    space,
                                                    string "=>",
                                                    space,
                                                    p_con env c3])

      | CName s => box [string "#", string s]

      | CRecord (k, xcs) =>
        if !debug then
            parenIf par (box [string "[",
                              p_list (fn (x, c) =>
                                         box [p_con env x,
                                              space,
                                              string "=",
                                              space,
                                              p_con env c]) xcs,
                              string "]::",
                              p_kind k])
        else
            parenIf par (box [string "[",
                              p_list (fn (x, c) =>
                                         box [p_con env x,
                                              space,
                                              string "=",
                                              space,
                                              p_con env c]) xcs,
                              string "]"])
      | CConcat (c1, c2) => parenIf par (box [p_con' true env c1,
                                              space,
                                              string "++",
                                              space,
                                              p_con env c2])
      | CFold _ => string "fold"

      | CUnit => string "()"

      | CTuple cs => box [string "(",
                          p_list (p_con env) cs,
                          string ")"]
      | CProj (c, n) => box [p_con env c,
                             string ".",
                             string (Int.toString n)]

      | CError => string "<ERROR>"
      | CUnif (_, _, _, ref (SOME c)) => p_con' par env c
      | CUnif (_, k, s, _) => box [string ("<UNIF:" ^ s ^ "::"),
                                   p_kind k,
                                   string ">"]
        
and p_con env = p_con' false env

and p_name env (all as (c, _)) =
    case c of
        CName s => string s
      | _ => p_con env all

fun p_patCon env pc =
    case pc of
        PConVar n =>
        ((if !debug then
              string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n)
          else
              string (#1 (E.lookupENamed env n)))
         handle E.UnboundRel _ => string ("UNBOUND_NAMED" ^ Int.toString n))
      | PConProj (m1, ms, x) =>
        let
            val m1x = #1 (E.lookupStrNamed env m1)
                handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1
                  
            val m1s = if !debug then
                          m1x ^ "__" ^ Int.toString m1
                      else
                          m1x
        in
            p_list_sep (string ".") string (m1x :: ms @ [x])
        end

fun p_pat' par env (p, _) =
    case p of
        PWild => string "_"
      | PVar (s, _) => string s
      | PPrim p => Prim.p_t p
      | PCon (_, pc, _, NONE) => p_patCon env pc
      | PCon (_, pc, _, SOME p) => parenIf par (box [p_patCon env pc,
                                                  space,
                                                  p_pat' true env p])
      | PRecord xps =>
        box [string "{",
             p_list_sep (box [string ",", space]) (fn (x, p, _) =>
                                                      box [string x,
                                                           space,
                                                           string "=",
                                                           space,
                                                           p_pat env p]) xps,
             string "}"]

and p_pat x = p_pat' false x

fun p_exp' par env (e, _) =
    case e of
        EPrim p => Prim.p_t p
      | ERel n =>
        ((if !debug then
              string (#1 (E.lookupERel env n) ^ "_" ^ Int.toString n)
          else
              string (#1 (E.lookupERel env n)))
         handle E.UnboundRel _ => string ("UNBOUND_REL" ^ Int.toString n))
      | ENamed n =>
        ((if !debug then
              string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n)
          else
              string (#1 (E.lookupENamed env n)))
         handle E.UnboundRel _ => string ("UNBOUND_NAMED" ^ Int.toString n))
      | EModProj (m1, ms, x) =>
        let
            val m1x = #1 (E.lookupStrNamed env m1)
                handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1
                  
            val m1s = if !debug then
                          m1x ^ "__" ^ Int.toString m1
                      else
                          m1x
        in
            p_list_sep (string ".") string (m1x :: ms @ [x])
        end
                                         
      | EApp (e1, e2) => parenIf par (box [p_exp env e1,
                                           space,
                                           p_exp' true env e2])
      | EAbs (x, t, _, e) => parenIf par (box [string "fn",
                                               space,
                                               string x,
                                               space,
                                               string ":",
                                               space,
                                               p_con env t,
                                               space,
                                               string "=>",
                                               space,
                                               p_exp (E.pushERel env x t) e])
      | ECApp (e, c) => parenIf par (box [p_exp env e,
                                          space,
                                          string "[",
                                          p_con env c,
                                          string "]"])
      | ECAbs (exp, x, k, e) => parenIf par (box [string "fn",
                                                  space,
                                                  string x,
                                                  space,
                                                  p_explicitness exp,
                                                  space,
                                                  p_kind k,
                                                  space,
                                                  string "=>",
                                                  space,
                                                  p_exp (E.pushCRel env x k) e])

      | ERecord xes => box [string "{",
                            p_list (fn (x, e, _) =>
                                       box [p_name env x,
                                            space,
                                            string "=",
                                            space,
                                            p_exp env e]) xes,
                            string "}"]
      | EField (e, c, {field, rest}) =>
        if !debug then
            box [p_exp' true env e,
                 string ".",
                 p_con' true env c,
                 space,
                 string "[",
                 p_con env field,
                 space,
                 string " in ",
                 space,
                 p_con env rest,
                 string "]"]
        else
            box [p_exp' true env e,
                 string ".",
                 p_con' true env c]
      | ECut (e, c, {field, rest}) =>
        parenIf par (if !debug then
                         box [p_exp' true env e,
                              space,
                              string "--",
                              space,
                              p_con' true env c,
                              space,
                              string "[",
                              p_con env field,
                              space,
                              string " in ",
                              space,
                              p_con env rest,
                              string "]"]
                     else
                         box [p_exp' true env e,
                              space,
                              string "--",
                              space,
                              p_con' true env c])
      | EFold _ => string "fold"

      | ECase (e, pes, _) => parenIf par (box [string "case",
                                               space,
                                               p_exp env e,
                                               space,
                                               string "of",
                                               space,
                                               p_list_sep (box [space, string "|", space])
                                                          (fn (p, e) => box [p_pat env p,
                                                                             space,
                                                                             string "=>",
                                                                             space,
                                                                             p_exp (E.patBinds env p) e]) pes])

      | EError => string "<ERROR>"
      | EUnif (ref (SOME e)) => p_exp env e
      | EUnif _ => string "_"

and p_exp env = p_exp' false env

fun p_named x n =
    if !debug then
        box [string x,
             string "__",
             string (Int.toString n)]
    else
        string x

fun p_datatype env (x, n, xs, cons) =
    let
        val k = (KType, ErrorMsg.dummySpan)
        val env = E.pushCNamedAs env x n k NONE
        val env = foldl (fn (x, env) => E.pushCRel env x k) env xs
    in
        box [string "datatype",
             space,
             string x,
             p_list_sep (box []) (fn x => box [space, string x]) xs,
             space,
             string "=",
             space,
             p_list_sep (box [space, string "|", space])
                        (fn (x, _, NONE) => string x
                          | (x, _, SOME t) => box [string x, space, string "of", space, p_con env t])
                        cons]
    end

fun p_sgn_item env (sgi, _) =
    case sgi of
        SgiConAbs (x, n, k) => box [string "con",
                                    space,
                                    p_named x n,
                                    space,
                                    string "::",
                                    space,
                                    p_kind k]
      | SgiCon (x, n, k, c) => box [string "con",
                                    space,
                                    p_named x n,
                                    space,
                                    string "::",
                                    space,
                                    p_kind k,
                                    space,
                                    string "=",
                                    space,
                                    p_con env c]
      | SgiDatatype x => p_datatype env x
      | SgiDatatypeImp (x, _, m1, ms, x', _, _) =>
        let
            val m1x = #1 (E.lookupStrNamed env m1)
                handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1
        in
            box [string "datatype",
                 space,
                 string x,
                 space,
                 string "=",
                 space,
                 string "datatype",
                 space,
                 p_list_sep (string ".") string (m1x :: ms @ [x'])]
        end
      | SgiVal (x, n, c) => box [string "val",
                                 space,
                                 p_named x n,
                                 space,
                                 string ":",
                                 space,
                                 p_con env c]
      | SgiStr (x, n, sgn) => box [string "structure",
                                   space,
                                   p_named x n,
                                   space,
                                   string ":",
                                   space,
                                   p_sgn env sgn]
      | SgiSgn (x, n, sgn) => box [string "signature",
                                   space,
                                   p_named x n,
                                   space,
                                   string "=",
                                   space,
                                   p_sgn env sgn]
      | SgiConstraint (c1, c2) => box [string "constraint",
                                       space,
                                       p_con env c1,
                                       space,
                                       string "~",
                                       space,
                                       p_con env c2]
      | SgiTable (_, x, n, c) => box [string "table",
                                      space,
                                      p_named x n,
                                      space,
                                      string ":",
                                      space,
                                      p_con env c]
      | SgiClassAbs (x, n) => box [string "class",
                                   space,
                                   p_named x n]
      | SgiClass (x, n, c) => box [string "class",
                                   space,
                                   p_named x n,
                                   space,
                                   string "=",
                                   space,
                                   p_con env c]

and p_sgn env (sgn, _) =
    case sgn of
        SgnConst sgis => box [string "sig",
                              newline,
                              let
                                  val (psgis, _) = ListUtil.foldlMap (fn (sgi, env) =>
                                                                         (p_sgn_item env sgi,
                                                                          E.sgiBinds env sgi))
                                                                     env sgis
                              in
                                  p_list_sep newline (fn x => x) psgis
                              end,
                              newline,
                              string "end"]
      | SgnVar n => ((string (#1 (E.lookupSgnNamed env n)))
                     handle E.UnboundNamed _ => string ("UNBOUND_SGN_" ^ Int.toString n))
      | SgnFun (x, n, sgn, sgn') => box [string "functor",
                                         space,
                                         string "(",
                                         string x,
                                         space,
                                         string ":",
                                         space,
                                         p_sgn env sgn,
                                         string ")",
                                         space,
                                         string ":",
                                         space,
                                         p_sgn (E.pushStrNamedAs env x n sgn) sgn']
      | SgnWhere (sgn, x, c) => box [p_sgn env sgn,
                                     space,
                                     string "where",
                                     space,
                                     string "con",
                                     space,
                                     string x,
                                     space,
                                     string "=",
                                     space,
                                     p_con env c]
      | SgnProj (m1, ms, x) =>
        let
            val m1x = #1 (E.lookupStrNamed env m1)
                handle E.UnboundNamed _ => "UNBOUND_SGN_" ^ Int.toString m1
                   
            val m1s = if !debug then
                          m1x ^ "__" ^ Int.toString m1
                      else
                          m1x
         in
            p_list_sep (string ".") string (m1x :: ms @ [x])
        end
      | SgnError => string "<ERROR>"

fun p_vali env (x, n, t, e) = box [p_named x n,
                                   space,
                                   string ":",
                                   space,
                                   p_con env t,
                                   space,
                                   string "=",
                                   space,
                                   p_exp env e]

fun p_decl env (dAll as (d, _) : decl) =
    case d of
        DCon (x, n, k, c) => box [string "con",
                                  space,
                                  p_named x n,
                                  space,
                                  string "::",
                                  space,
                                  p_kind k,
                                  space,
                                  string "=",
                                  space,
                                  p_con env c]
      | DDatatype x => p_datatype env x
      | DDatatypeImp (x, _, m1, ms, x', _, _) =>
        let
            val m1x = #1 (E.lookupStrNamed env m1)
                handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1
        in
            box [string "datatype",
                 space,
                 string x,
                 space,
                 string "=",
                 space,
                 string "datatype",
                 space,
                 p_list_sep (string ".") string (m1x :: ms @ [x'])]
        end
      | DVal vi => box [string "val",
                        space,
                        p_vali env vi]
      | DValRec vis =>
        let
            val env = E.declBinds env dAll
        in
            box [string "val",
                 space,
                 string "rec",
                 space,
                 p_list_sep (box [newline, string "and", space]) (p_vali env) vis]
        end
                             
      | DSgn (x, n, sgn) => box [string "signature",
                                 space,
                                 p_named x n,
                                 space,
                                 string "=",
                                 space,
                                 p_sgn env sgn]
      | DStr (x, n, sgn, str) => box [string "structure",
                                      space,
                                      p_named x n,
                                      space,
                                      string ":",
                                      space,
                                      p_sgn env sgn,
                                      space,
                                      string "=",
                                      space,
                                      p_str env str]
      | DFfiStr (x, n, sgn) => box [string "extern",
                                    space,
                                    string "structure",
                                    space,
                                    p_named x n,
                                    space,
                                    string ":",
                                    space,
                                    p_sgn env sgn]
      | DConstraint (c1, c2) => box [string "constraint",
                                     space,
                                     p_con env c1,
                                     space,
                                     string "~",
                                     space,
                                     p_con env c2]
      | DExport (_, sgn, str) => box [string "export",
                                      space,
                                      p_str env str,
                                      space,
                                      string ":",
                                      space,
                                      p_sgn env sgn]
      | DTable (_, x, n, c) => box [string "table",
                                    space,
                                    p_named x n,
                                    space,
                                    string ":",
                                    space,
                                    p_con env c]
      | DClass (x, n, c) => box [string "class",
                                 space,
                                 p_named x n,
                                 space,
                                 string "=",
                                 space,
                                 p_con env c]
      | DDatabase s => box [string "database",
                            space,
                            string s]

and p_str env (str, _) =
    case str of
        StrConst ds => box [string "struct",
                            newline,
                            p_file env ds,
                            newline,
                            string "end"]
      | StrVar n => ((string (#1 (E.lookupStrNamed env n)))
                     handle E.UnboundNamed _ => string ("UNBOUND_STR_" ^ Int.toString n))
      | StrProj (str, s) => box [p_str env str,
                                 string ".",
                                 string s]
      | StrFun (x, n, sgn, sgn', str) =>
        let
            val env' = E.pushStrNamedAs env x n sgn
        in
            box [string "functor",
                 space,
                 string "(",
                 string x,
                 space,
                 string ":",
                 space,
                 p_sgn env sgn,
                 string ")",
                 space,
                 string ":",
                 space,
                 p_sgn env' sgn',
                 space,
                 string "=>",
                 space,
                 p_str env' str]
        end
      | StrApp (str1, str2) => box [p_str env str1,
                                    string "(",
                                    p_str env str2,
                                    string ")"]
      | StrError => string "<ERROR>"

and p_file env file =
    let
        val (pds, _) = ListUtil.foldlMap (fn (d, env) =>
                                             (p_decl env d,
                                              E.declBinds env d))
                                         env file
    in
        p_list_sep newline (fn x => x) pds
    end

end