aboutsummaryrefslogtreecommitdiffstats
path: root/scripts/pnodes.py
blob: ec00a54ace454e91e5c9e3651cc5c55ca18b0c7c (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
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
#!/usr/bin/env python3

import re
import sys
from argparse import ArgumentParser

field_file = "nodes.ads"
kind_file = "iirs.ads"
node_file = "iirs.ads"
template_file = "iirs.adb.in"
meta_base_file = "nodes_meta"
prefix_name = "Iir_Kind_"
prefix_range_name = "Iir_Kinds_"
type_name = "Iir_Kind"
node_type = "Iir"
conversions = ["uc", "pos", "grp"]


class FuncDesc:
    def __init__(self, name, fields, conv, acc, pname, ptype, rname, rtype):
        self.name = name
        self.fields = fields  # List of physical fields used
        self.conv = conv
        self.acc = acc  # access: Chain, Chain_Next, Ref, Of_Ref, Maybe_Ref,
        #                 Forward_Ref, Maybe_Forward_Ref
        self.pname = pname  # Parameter mame
        self.ptype = ptype  # Parameter type
        self.rname = rname  # value name (for procedure)
        self.rtype = rtype  # value type


class NodeDesc:
    def __init__(self, name, format, fields, attrs):
        self.name = name
        self.format = format
        self.fields = fields  # {field: FuncDesc} dict, defined for all fields
        self.attrs = attrs  # A {attr: FuncDesc} dict
        self.order = []  # List of fields name, in order of appearance.


class line:
    def __init__(self, string, no):
        self.l = string
        self.n = no


class EndOfFile(Exception):
    def __init__(self, filename):
        self.filename = filename

    def __str__(self):
        return "end of file " + self.filename


class linereader:
    def __init__(self, filename):
        self.filename = filename
        self.f = open(filename)
        self.lineno = 0
        self.l = ""

    def get(self):
        self.l = self.f.readline()
        if not self.l:
            raise EndOfFile(self.filename)
        self.lineno = self.lineno + 1
        return self.l


class ParseError(Exception):
    def __init__(self, lr, msg):
        self.lr = lr
        self.msg = msg

    def __str__(self):
        return ("Parse error at {lr.filename}:{lr.lineno}: {msg}".format(lr=self.lr, msg=self.msg))


# Return fields description.
# This is a dictionary.  The keys represent the possible format of a node.
# The values are dictionaries representing fields.  Keys are fields name, and
# values are fields type.
def read_fields(file):
    fields = {}
    formats = []
    lr = linereader(file)

    #  Search for 'type Format_Type is'
    while lr.get() != "   type Format_Type is\n":
        pass

    # Skip '('
    if lr.get() != "     (\n":
        raise Exception("no open parenthesis after Format_Type")

    # Read formats
    l = lr.get()
    pat_field_name = re.compile("      Format_(\w+),?\n")
    while l != "     );\n":
        m = pat_field_name.match(l)
        if m is None:
            print(l)
            raise Exception("bad literal within Format_Type")
        name = m.group(1)
        formats.append(name)
        fields[name] = {}
        l = lr.get()

    # Read fields
    l = lr.get()
    pat_fields = re.compile("   -- Fields of Format_(\w+):\n")
    pat_field_desc = re.compile("   --   (\w+) : (\w+).*\n")
    common_desc = {}

    # Read until common fields.
    while l != "   -- Common fields are:\n":
        l = lr.get()
    format_name = "Common"
    nbr_formats = 0

    while True:
        # 1) Read field description
        l = lr.get()
        desc = common_desc.copy()
        while True:
            m = pat_field_desc.match(l)
            if m is None:
                break
            desc[m.group(1)] = m.group(2)
            l = lr.get()
            # print 'For: ' + format_name + ': ' + m.group(1)

        # 2) Disp
        if format_name == "Common":
            common_desc = desc
        else:
            fields[format_name] = desc

        # 3) Read next format
        if l == "\n":
            if nbr_formats == len(fields):
                break
            else:
                l = lr.get()

        # One for a format
        m = pat_fields.match(l)
        if m is not None:
            format_name = m.group(1)
            if format_name not in fields:
                raise ParseError(lr, "Format " + format_name + " is unknown")
            nbr_formats = nbr_formats + 1
        else:
            raise ParseError(lr, "unhandled format line")

    return (formats, fields)


# Read kinds and kinds ranges.
def read_kinds(filename):
    lr = linereader(filename)
    kinds = []
    #  Search for 'type Iir_Kind is'
    while lr.get() != "   type " + type_name + " is\n":
        pass
    # Skip '('
    if lr.get() != "     (\n":
        raise ParseError(lr, 'no open parenthesis after "type ' + type_name + '"')

    # Read literals
    pat_node = re.compile("      " + prefix_name + "(\w+),?( +-- .*)?\n")
    pat_comment = re.compile("( +-- .*)?\n")
    while True:
        l = lr.get()
        if l == "     );\n":
            break
        m = pat_node.match(l)
        if m:
            kinds.append(m.group(1))
            continue
        m = pat_comment.match(l)
        if not m:
            raise ParseError(lr, "Unknown line within kind declaration")

    # Check subtypes
    pat_subtype = re.compile("   subtype " + r"(\w+) is " + type_name + " range\n")
    pat_first = re.compile("     " + prefix_name + r"(\w+) ..\n")
    pat_last = re.compile("     " + prefix_name + r"(\w+);\n")
    pat_middle = re.compile("   --" + prefix_name + r"(\w+)\n")
    kinds_ranges = {}
    while True:
        l = lr.get()
        # Start of methods is also end of subtypes.
        if l == "   -- General methods.\n":
            break
        # Found a subtype.
        m = pat_subtype.match(l)
        if m:
            # Check first bound
            name = m.group(1)
            if not name.startswith(prefix_range_name):
                raise ParseError(lr, "incorrect prefix for subtype")
            name = name[len(prefix_range_name):]
            l = lr.get()
            mf = pat_first.match(l)
            if not mf:
                raise ParseError(lr, "badly formatted first bound of subtype")
            first = kinds.index(mf.group(1))
            idx = first
            has_middle = None
            # Read until last bound
            while True:
                l = lr.get()
                ml = pat_middle.match(l)
                if ml:
                    # Check element in the middle
                    n = ml.group(1)
                    if n not in kinds:
                        raise ParseError(lr, "unknown kind " + n + " in subtype")
                    if kinds.index(n) != idx + 1:
                        raise ParseError(
                            lr, "missing " + kinds[idx + 1] + " in subtype"
                        )
                    has_middle = True
                    idx = idx + 1
                else:
                    # Check last bound
                    ml = pat_last.match(l)
                    if ml:
                        last = kinds.index(ml.group(1))
                        if last != idx + 1 and has_middle:
                            raise ParseError(
                                lr, "missing " + kinds[idx] + " in subtype"
                            )
                        break
                    raise ParseError(lr, "unhandled line in subtype")
            kinds_ranges[name] = kinds[first: last + 1]
    return (kinds, kinds_ranges)


# Read functions
def read_methods(filename):
    lr = linereader(filename)
    # Note: this is a list so that the output is deterministic.
    # Duplicates are not detected, but they will be by the Ada compiler.
    # TODO: use an ordered dict ?
    funcs = []
    pat_field = re.compile(r"   --  Field: ([\w,]+)( \w+)?( \(\w+\))?\n")
    pat_conv = re.compile(r"^ \((\w+)\)$")
    pat_func = re.compile(r"   function Get_(\w+) \((\w+) : (\w+)\) return (\w+);\n")
    pat_proc = re.compile(r"   procedure Set_(\w+) \((\w+) : (\w+); (\w+) : (\w+)\);\n")
    pat_end = re.compile("end [A-Za-z.]+;\n")
    while True:
        l = lr.get()
        # Start of methods
        if l == "   -- General methods.\n":
            break
    while True:
        l = lr.get()
        if pat_end.match(l):
            break
        m = pat_field.match(l)
        if m:
            fields = m.group(1).split(",")
            # Extract access modifier
            acc = m.group(2)
            if acc:
                acc = acc.strip()
            # Extract conversion
            conv = m.group(3)
            if conv:
                mc = pat_conv.match(conv)
                if not mc:
                    raise ParseError(lr, "conversion ill formed")
                conv = mc.group(1)
                if conv not in conversions:
                    raise ParseError(lr, "unknown conversion " + conv)
            else:
                conv = None
            if len(fields) > 1 and conv != "grp":
                raise ParseError(lr, "bad conversion for multiple fields")
            # Read function
            l = lr.get()
            mf = pat_func.match(l)
            if not mf:
                raise ParseError(lr, "function declaration expected after Field")
            # Read procedure
            l = lr.get()
            mp = pat_proc.match(l)
            if not mp:
                raise ParseError(lr, "procedure declaration expected after function")
            # Consistency check between function and procedure
            if mf.group(1) != mp.group(1):
                raise ParseError(lr, "function and procedure name mismatch")
            if mf.group(2) != mp.group(2):
                raise ParseError(lr, "parameter name mismatch with function")
            if mf.group(3) != mp.group(3):
                raise ParseError(lr, "parameter type mismatch with function")
            if mf.group(4) != mp.group(5):
                raise ParseError(lr, "result type mismatch with function")
            funcs.append(
                FuncDesc(
                    mf.group(1),
                    fields,
                    conv,
                    acc,
                    mp.group(2),
                    mp.group(3),
                    mp.group(4),
                    mp.group(5),
                )
            )

    return funcs


# Read description for one node
# LR is the line reader.  NAMES is the list of (node name, format)
#  (one description may describe several nodes).
# A comment start at column 2 or 4 or later.
def read_nodes_fields(lr, names, fields, nodes, funcs_dict):
    pat_only = re.compile("   -- Only for " + prefix_name + "(\w+):\n")
    pat_only_bad = re.compile("   -- *Only for.*\n")
    pat_field = re.compile("   --   Get/Set_(\w+) \((Alias )?([\w,]+)\)\n")
    pat_comment = re.compile("   --(|  [^ ].*|    .*)\n")

    # Create nodes
    cur_nodes = []
    for (nm, fmt) in names:
        if fmt not in fields:
            raise ParseError(lr, 'unknown format "{}"'.format(fmt))
        n = NodeDesc(nm, fmt, {x: None for x in fields[fmt]}, {})
        nodes[nm] = n
        cur_nodes.append(n)

    # Skip comments
    l = lr.l
    while pat_comment.match(l):
        l = lr.get()

    # Look for fields
    while l != "\n":
        # Skip comments
        while pat_comment.match(l):
            l = lr.get()

        # Handle 'Only ...'
        m = pat_only.match(l)
        if m:
            only_nodes = []
            while True:
                name = m.group(1)
                n = nodes.get(name, None)
                if n is None:
                    raise ParseError(lr, "node is unknown")
                if n not in cur_nodes:
                    raise ParseError(lr, "node not currently described")
                only_nodes.append(n)
                l = lr.get()
                m = pat_only.match(l)
                if not m:
                    break
        else:
            # By default a field applies to all nodes.
            only_nodes = cur_nodes

        # Skip comments
        while pat_comment.match(l):
            l = lr.get()

        # Handle field: '--  Get/Set_FUNC (Alias? FIELD)'
        m = pat_field.match(l)
        if not m:
            if pat_only_bad.match(l):
                raise ParseError(lr, "misleading 'Only for' comment")
            else:
                raise ParseError(lr, "bad line in node description")

        func = m.group(1)
        alias = m.group(2)
        fields = m.group(3).split(",")

        # Check the function exists and if the field is correct.
        if func not in funcs_dict:
            raise ParseError(lr, "unknown function")
        func = funcs_dict[func]
        if func.fields != fields:
            raise ParseError(lr, "fields mismatch")

        for c in only_nodes:
            for f in fields:
                if f not in c.fields:
                    raise ParseError(lr, "field " + f + " does not exist in node")
            if not alias:
                for f in fields:
                    if c.fields[f]:
                        raise ParseError(lr, "field " + f + " already used")
                    c.fields[f] = func
                    c.order.append(f)
            c.attrs[func.name] = func

        l = lr.get()


def read_nodes(filename, kinds, kinds_ranges, fields, funcs):
    """Read description for all nodes."""
    lr = linereader(filename)
    funcs_dict = {x.name: x for x in funcs}
    nodes = {}

    # Skip until start
    while lr.get() != "   -- Start of " + type_name + ".\n":
        pass

    pat_decl = re.compile("   -- " + prefix_name + "(\w+) \((\w+)\)\n")
    pat_decls = re.compile("   -- " + prefix_range_name + "(\w+) \((\w+)\)\n")
    pat_comment_line = re.compile("   --+\n")
    pat_comment_box = re.compile("   --(  .*)?\n")
    while True:
        l = lr.get()
        if l == "   -- End of " + type_name + ".\n":
            break
        if l == "\n":
            continue
        m = pat_decl.match(l)
        if m:
            # List of nodes being described by the current description.
            names = []

            # Declaration of the first node
            while True:
                name = m.group(1)
                if name not in kinds:
                    raise ParseError(lr, "unknown node")
                fmt = m.group(2)
                names.append((name, fmt))
                if name in nodes:
                    raise ParseError(lr, "node {} already described".format(name))
                # There might be several nodes described at once.
                l = lr.get()
                m = pat_decl.match(l)
                if not m:
                    break
            read_nodes_fields(lr, names, fields, nodes, funcs_dict)
            continue
        m = pat_decls.match(l)
        if m:
            # List of nodes being described by the current description.
            name = m.group(1)
            fmt = m.group(2)
            names = [(k, fmt) for k in kinds_ranges[name]]
            lr.get()
            read_nodes_fields(lr, names, fields, nodes, funcs_dict)
            continue
        if pat_comment_line.match(l) or pat_comment_box.match(l):
            continue
        raise ParseError(lr, "bad line in node description")

    for k in kinds:
        if k not in nodes:
            raise ParseError(lr, 'no description for "{}"'.format(k))
    return nodes


def gen_choices(choices):
    """Generate a choice 'when A | B ... Z =>' using elements of CHOICES."""
    is_first = True
    for c in choices:
        ch = prefix_name + c
        if is_first:
            is_first = False
            print("         when " + ch, end='')
        else:
            print()
            print("           | " + ch, end='')
    print(" =>")


def gen_get_format(formats, nodes, kinds=None):
    """Generate the Get_Format function."""
    print("   function Get_Format (Kind : " + type_name + ") " + "return Format_Type is")
    print("   begin")
    print("      case Kind is")
    for f in formats:
        choices = [k for k in kinds if nodes[k].format == f]
        gen_choices(choices)
        print("            return Format_" + f + ";")
    print("      end case;")
    print("   end Get_Format;")


def gen_subprg_header(decl):
    if len(decl) < 76:
        print(decl + " is")
    else:
        print(decl)
        print("   is")
    print("   begin")


def gen_assert(func):
    print("      pragma Assert (" + func.pname + " /= Null_" + node_type + ");")
    cond = "(Has_" + func.name + " (Get_Kind (" + func.pname + ")),"
    msg = '"no field ' + func.name + '");'
    if len(cond) < 60:
        print("      pragma Assert " + cond)
        print("                     " + msg)
    else:
        print("      pragma Assert")
        print("         " + cond)
        print("          " + msg)


def get_field_type(fields, f):
    for fld in list(fields.values()):
        if f in fld:
            return fld[f]
    return None


def gen_get_set(func, nodes, fields):
    """Generate Get_XXX/Set_XXX subprograms for FUNC."""
    rtype = func.rtype
    # If the function needs several fields, it must be user defined
    if func.conv == "grp":
        print("   type %s_Conv is record" % rtype)
        for f in func.fields:
            print("      %s: %s;" % (f, get_field_type(fields, f)))
        print("   end record;")
        print("   pragma Pack (%s_Conv);" % rtype)
        print("   pragma Assert (%s_Conv'Size = %s'Size);" % (rtype, rtype))
        print()
    else:
        f = func.fields[0]
        g = "Get_" + f + " (" + func.pname + ")"

    s = func.rname
    if func.conv:
        if func.conv == "uc":
            field_type = get_field_type(fields, f)
            g = field_type + "_To_" + rtype + " (" + g + ")"
            s = rtype + "_To_" + field_type + " (" + s + ")"
        elif func.conv == "pos":
            g = rtype + "'Val (" + g + ")"
            s = rtype + "'Pos (" + s + ")"

    subprg = (
        "   function Get_"
        + func.name
        + " ("
        + func.pname
        + " : "
        + func.ptype
        + ") return "
        + rtype
    )
    if func.conv == "grp":
        print(subprg)
        print("   is")
        print("      function To_%s is new Ada.Unchecked_Conversion" % func.rtype)
        print("         (%s_Conv, %s);" % (rtype, rtype))
        print("      Conv : %s_Conv;" % rtype)
        print("   begin")
    else:
        gen_subprg_header(subprg)
    gen_assert(func)
    if func.conv == "grp":
        for f in func.fields:
            print("      Conv.%s := Get_%s (%s);" % (f, f, func.pname))
        g = "To_%s (Conv)" % rtype
    print("      return " + g + ";")
    print("   end Get_" + func.name + ";")
    print()

    subprg = (
        "   procedure Set_"
        + func.name
        + " ("
        + func.pname
        + " : "
        + func.ptype
        + "; "
        + func.rname
        + " : "
        + func.rtype
        + ")"
    )
    if func.conv == "grp":
        print(subprg)
        print("   is")
        print("      function To_%s_Conv is new Ada.Unchecked_Conversion" % func.rtype)
        print("         (%s, %s_Conv);" % (rtype, rtype))
        print("      Conv : %s_Conv;" % rtype)
        print("   begin")
    else:
        gen_subprg_header(subprg)
    gen_assert(func)
    if func.conv == "grp":
        print("      Conv := To_%s_Conv (%s);" % (rtype, func.rname))
        for f in func.fields:
            print("      Set_%s (%s, Conv.%s);" % (f, func.pname, f))
    else:
        print("      Set_" + f + " (" + func.pname + ", " + s + ");")
    print("   end Set_" + func.name + ";")
    print()


def funcs_of_node(n):
    return sorted([fv.name for fv in list(n.fields.values()) if fv])


def gen_has_func_spec(name, suff):
    spec = "   function Has_" + name + " (K : " + type_name + ")"
    ret = " return Boolean" + suff
    if len(spec) < 60:
        print(spec + ret)
    else:
        print(spec)
        print("     " + ret)


def do_disp_formats():
    for fmt in fields:
        print("Fields of Format_" + fmt)
        fld = fields[fmt]
        for k in fld:
            print("  " + k + " (" + fld[k] + ")")


def do_disp_kinds():
    print("Kinds are:")
    for k in kinds:
        print("  " + prefix_name + k)


def do_disp_funcs():
    print("Functions are:")
    for f in funcs:
        s = "{0} ({1}: {2}".format(f.name, f.fields, f.rtype)
        if f.acc:
            s += " acc:" + f.acc
        if f.conv:
            s += " conv:" + f.conv
        s += ")"
        print(s)


def do_disp_types():
    print("Types are:")
    s = set([])
    for f in funcs:
        s |= {f.rtype}
    for t in sorted(s):
        print("  " + t)


def do_disp_nodes():
    for k in kinds:
        v = nodes[k]
        print(prefix_name + k + " (" + v.format + ")")
        flds = [fk for fk, fv in list(v.fields.items()) if fv]
        for fk in sorted(flds):
            print("  " + fk + ": " + v.fields[fk].name)


def do_get_format():
    gen_get_format(formats, nodes)


def do_body():
    lr = linereader(template_file)
    while True:
        l = lr.get().rstrip()
        print(l)
        if l == "   --  Subprograms":
            gen_get_format(formats, nodes, kinds)
            print()
            for f in funcs:
                gen_get_set(f, nodes, fields)
        if l[0:3] == "end":
            break


def get_types():
    s = set([])
    for f in funcs:
        s |= {f.rtype}
    return [t for t in sorted(s)]


def get_attributes():
    s = set([])
    for f in funcs:
        if f.acc:
            s |= {f.acc}
    res = [t for t in sorted(s)]
    res.insert(0, "None")
    return res


def gen_enum(prefix, vals):
    last = None
    for v in vals:
        if last:
            print(last + ",")
        last = prefix + v
    print(last)


def do_meta_specs():
    lr = linereader(meta_base_file + ".ads.in")
    types = get_types()
    while True:
        l = lr.get().rstrip()
        if l == "      --  TYPES":
            gen_enum("      Type_", types)
        elif l == "      --  FIELDS":
            gen_enum("      Field_", [f.name for f in funcs])
        elif l == "      --  ATTRS":
            gen_enum("      Attr_", get_attributes())
        elif l == "   --  FUNCS":
            for t in types:
                print("   function Get_" + t)
                print("      (N : " + node_type + "; F : Fields_Enum) return " + t + ";")
                print("   procedure Set_" + t)
                print("      (N : " + node_type + "; F : Fields_Enum; V: " + t + ");")
                print()
            for f in funcs:
                gen_has_func_spec(f.name, ";")
        elif l[0:3] == "end":
            print(l)
            break
        else:
            print(l)


def do_meta_body():
    lr = linereader(meta_base_file + ".adb.in")
    while True:
        l = lr.get().rstrip()
        if l == "      --  FIELDS_TYPE":
            last = None
            for f in funcs:
                if last:
                    print(last + ",")
                last = "      Field_" + f.name + " => Type_" + f.rtype
            print(last)
        elif l == "         --  FIELD_IMAGE":
            for f in funcs:
                print("         when Field_" + f.name + " =>")
                print('            return "' + f.name.lower() + '";')
        elif l == "         --  IIR_IMAGE":
            for k in kinds:
                print("         when " + prefix_name + k + " =>")
                print('            return "' + k.lower() + '";')
        elif l == "         --  FIELD_ATTRIBUTE":
            for f in funcs:
                print("         when Field_" + f.name + " =>")
                if f.acc:
                    attr = f.acc
                else:
                    attr = "None"
                print("            return Attr_" + attr + ";")
        elif l == "      --  FIELDS_ARRAY":
            last = None
            nodes_types = [node_type, node_type + "_List", node_type + "_Flist"]
            for k in kinds:
                v = nodes[k]
                if last:
                    print(last + ",")
                last = None
                print("      --  " + prefix_name + k)
                # Get list of physical fields for V, in some order.
                if flag_keep_order:
                    flds = v.order
                else:
                    # First non Iir and no Iir_List.
                    flds = sorted(
                        [
                            fk
                            for fk, fv in list(v.fields.items())
                            if fv and fv.rtype not in nodes_types
                        ]
                    )
                    # Then Iir and Iir_List in order of appearance
                    flds += (fv for fv in v.order if v.fields[fv].rtype in nodes_types)
                # Print the corresponding node field, but remove duplicate due
                # to 'grp'.
                fldsn = []
                for fk in flds:
                    if last:
                        print(last + ",")
                    # Remove duplicate
                    fn = v.fields[fk].name
                    if fn not in fldsn:
                        last = "      Field_" + fn
                        fldsn.append(fn)
                    else:
                        last = None
            if last:
                print(last)
        elif l == "      --  FIELDS_ARRAY_POS":
            pos = -1
            last = None
            for k in kinds:
                v = nodes[k]
                # Create a set to remove duplicate for 'grp'.
                flds = set([fv.name for fk, fv in list(v.fields.items()) if fv])
                pos += len(flds)
                if last:
                    print(last + ",")
                last = "      " + prefix_name + k + " => {}".format(pos)
            print(last)
        elif l == "   --  FUNCS_BODY":
            # Build list of types
            s = set([])
            for f in funcs:
                s |= {f.rtype}
            types = [t for t in sorted(s)]
            for t in types:
                print("   function Get_" + t)
                print("      (N : " + node_type + "; F : Fields_Enum) return " + t + " is")
                print("   begin")
                print("      pragma Assert (Fields_Type (F) = Type_" + t + ");")
                print("      case F is")
                for f in funcs:
                    if f.rtype == t:
                        print("         when Field_" + f.name + " =>")
                        print("            return Get_" + f.name + " (N);")
                print("         when others =>")
                print("            raise Internal_Error;")
                print("      end case;")
                print("   end Get_" + t + ";")
                print()
                print("   procedure Set_" + t)
                print("      (N : " + node_type + "; F : Fields_Enum; V: " + t + ") is")
                print("   begin")
                print("      pragma Assert (Fields_Type (F) = Type_" + t + ");")
                print("      case F is")
                for f in funcs:
                    if f.rtype == t:
                        print("         when Field_" + f.name + " =>")
                        print("            Set_" + f.name + " (N, V);")
                print("         when others =>")
                print("            raise Internal_Error;")
                print("      end case;")
                print("   end Set_" + t + ";")
                print()
            for f in funcs:
                gen_has_func_spec(f.name, " is")
                choices = [k for k in kinds if f.name in nodes[k].attrs]
                if len(choices) == 0:
                    print("      pragma Unreferenced (K);")
                print("   begin")
                if len(choices) == 0:
                    print("      return False;")
                elif len(choices) == 1:
                    print("      return K = " + prefix_name + choices[0] + ";")
                else:
                    print("      case K is")
                    gen_choices(choices)
                    print("            return True;")
                    print("         when others =>")
                    print("            return False;")
                    print("      end case;")
                print("   end Has_" + f.name + ";")
                print()
        elif l[0:3] == "end":
            print(l)
            break
        else:
            print(l)


actions = {
    "disp-nodes": do_disp_nodes,
    "disp-kinds": do_disp_kinds,
    "disp-formats": do_disp_formats,
    "disp-funcs": do_disp_funcs,
    "disp-types": do_disp_types,
    "get_format": do_get_format,
    "body": do_body,
    "meta_specs": do_meta_specs,
    "meta_body": do_meta_body,
}


def _generateCLIParser() -> ArgumentParser:
    """"""
    parser = ArgumentParser(description="Meta-grammar processor")
    parser.add_argument("action", choices=list(actions.keys()), default="disp-nodes")
    parser.add_argument(
        "--field-file",
        dest="field_file",
        default="nodes.ads",
        help="specify file which defines fields",
    )
    parser.add_argument(
        "--kind-file",
        dest="kind_file",
        default="iirs.ads",
        help="specify file which defines nodes kind",
    )
    parser.add_argument(
        "--node-file",
        dest="node_file",
        default="iirs.ads",
        help="specify file which defines nodes and methods",
    )
    parser.add_argument(
        "--template-file",
        dest="template_file",
        default="iirs.adb.in",
        help="specify template body file",
    )
    parser.add_argument(
        "--meta-basename",
        dest="meta_basename",
        default="nodes_meta",
        help="specify base name of meta files",
    )
    parser.add_argument(
        "--kind-type", dest="kind_type", default="Iir_Kind", help="name of kind type"
    )
    parser.add_argument(
        "--kind-prefix",
        dest="kind_prefix",
        default="Iir_Kind_",
        help="prefix for kind literals",
    )
    parser.add_argument(
        "--kind-range-prefix",
        dest="kind_range_prefix",
        default="Iir_Kinds_",
        help="prefix for kind subtype (range)",
    )
    parser.add_argument(
        "--node-type", dest="node_type", default="Iir", help="name of the node type"
    )
    parser.add_argument(
        "--keep-order",
        dest="flag_keep_order",
        action="store_true",
        help="keep field order of nodes",
    )
    parser.set_defaults(flag_keep_order=False)

    return parser


def main():
    parser = _generateCLIParser()
    args = parser.parse_args()

    # At some point, it would be simpler to create a class...
    global formats, fields, nodes, kinds, kinds_ranges, funcs

    global type_name, prefix_name, template_file, node_type, meta_base_file
    global prefix_range_name, flag_keep_order, kind_file

    type_name = args.kind_type
    prefix_name = args.kind_prefix
    prefix_range_name = args.kind_range_prefix
    template_file = args.template_file
    node_type = args.node_type
    meta_base_file = args.meta_basename
    flag_keep_order = args.flag_keep_order

    field_file = args.field_file
    kind_file = args.kind_file
    node_file = args.node_file

    try:
        (formats, fields) = read_fields(field_file)
        (kinds, kinds_ranges) = read_kinds(kind_file)
        funcs = read_methods(node_file)
        nodes = read_nodes(node_file, kinds, kinds_ranges, fields, funcs)

    except ParseError as e:
        print(e, file=sys.stderr)
        print("in {0}:{1}:{2}".format(e.lr.filename, e.lr.lineno, e.lr.l), file=sys.stderr)
        sys.exit(1)

    f = actions.get(args.action, None)
    if not f:
        print("Action {0} is unknown".format(args.action), file=sys.stderr)
        sys.exit(1)
    f()


if __name__ == "__main__":
    main()