forked from llvm/llvm-project
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathFortran-parsers.cpp
1424 lines (1241 loc) · 67.8 KB
/
Fortran-parsers.cpp
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
993
994
995
996
997
998
999
1000
//===-- lib/Parser/Fortran-parsers.cpp ------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Top-level grammar specification for Fortran. These parsers drive
// the tokenization parsers in cooked-tokens.h to consume characters,
// recognize the productions of Fortran, and to construct a parse tree.
// See ParserCombinators.md for documentation on the parser combinator
// library used here to implement an LL recursive descent recognizer.
// The productions that follow are derived from the draft Fortran 2018
// standard, with some necessary modifications to remove left recursion
// and some generalization in order to defer cases where parses depend
// on the definitions of symbols. The "Rxxx" numbers that appear in
// comments refer to these numbered requirements in the Fortran standard.
// The whole Fortran grammar originally constituted one header file,
// but that turned out to require more memory to compile with current
// C++ compilers than some people were willing to accept, so now the
// various per-type parsers are partitioned into several C++ source
// files. This file contains parsers for constants, types, declarations,
// and misfits (mostly clauses 7, 8, & 9 of Fortran 2018). The others:
// executable-parsers.cpp Executable statements
// expr-parsers.cpp Expressions
// io-parsers.cpp I/O statements and FORMAT
// openmp-parsers.cpp OpenMP directives
// program-parsers.cpp Program units
#include "basic-parsers.h"
#include "expr-parsers.h"
#include "misc-parsers.h"
#include "stmt-parser.h"
#include "token-parsers.h"
#include "type-parser-implementation.h"
#include "flang/Parser/parse-tree.h"
#include "flang/Parser/user-state.h"
namespace Fortran::parser {
// R601 alphanumeric-character -> letter | digit | underscore
// R603 name -> letter [alphanumeric-character]...
constexpr auto nonDigitIdChar{letter || otherIdChar};
constexpr auto rawName{nonDigitIdChar >> many(nonDigitIdChar || digit)};
TYPE_PARSER(space >> sourced(rawName >> construct<Name>()))
// R608 intrinsic-operator ->
// power-op | mult-op | add-op | concat-op | rel-op |
// not-op | and-op | or-op | equiv-op
// R610 extended-intrinsic-op -> intrinsic-operator
// These parsers must be ordered carefully to avoid misrecognition.
constexpr auto namedIntrinsicOperator{
".LT." >> pure(DefinedOperator::IntrinsicOperator::LT) ||
".LE." >> pure(DefinedOperator::IntrinsicOperator::LE) ||
".EQ." >> pure(DefinedOperator::IntrinsicOperator::EQ) ||
".NE." >> pure(DefinedOperator::IntrinsicOperator::NE) ||
".GE." >> pure(DefinedOperator::IntrinsicOperator::GE) ||
".GT." >> pure(DefinedOperator::IntrinsicOperator::GT) ||
".NOT." >> pure(DefinedOperator::IntrinsicOperator::NOT) ||
".AND." >> pure(DefinedOperator::IntrinsicOperator::AND) ||
".OR." >> pure(DefinedOperator::IntrinsicOperator::OR) ||
".EQV." >> pure(DefinedOperator::IntrinsicOperator::EQV) ||
".NEQV." >> pure(DefinedOperator::IntrinsicOperator::NEQV) ||
extension<LanguageFeature::XOROperator>(
"nonstandard usage: .XOR. spelling of .NEQV."_port_en_US,
".XOR." >> pure(DefinedOperator::IntrinsicOperator::NEQV)) ||
extension<LanguageFeature::LogicalAbbreviations>(
"nonstandard usage: abbreviated logical operator"_port_en_US,
".N." >> pure(DefinedOperator::IntrinsicOperator::NOT) ||
".A." >> pure(DefinedOperator::IntrinsicOperator::AND) ||
".O." >> pure(DefinedOperator::IntrinsicOperator::OR) ||
extension<LanguageFeature::XOROperator>(
"nonstandard usage: .X. spelling of .NEQV."_port_en_US,
".X." >> pure(DefinedOperator::IntrinsicOperator::NEQV)))};
constexpr auto intrinsicOperator{
"**" >> pure(DefinedOperator::IntrinsicOperator::Power) ||
"*" >> pure(DefinedOperator::IntrinsicOperator::Multiply) ||
"//" >> pure(DefinedOperator::IntrinsicOperator::Concat) ||
"/=" >> pure(DefinedOperator::IntrinsicOperator::NE) ||
"/" >> pure(DefinedOperator::IntrinsicOperator::Divide) ||
"+" >> pure(DefinedOperator::IntrinsicOperator::Add) ||
"-" >> pure(DefinedOperator::IntrinsicOperator::Subtract) ||
"<=" >> pure(DefinedOperator::IntrinsicOperator::LE) ||
extension<LanguageFeature::AlternativeNE>(
"nonstandard usage: <> spelling of /= or .NE."_port_en_US,
"<>" >> pure(DefinedOperator::IntrinsicOperator::NE)) ||
"<" >> pure(DefinedOperator::IntrinsicOperator::LT) ||
"==" >> pure(DefinedOperator::IntrinsicOperator::EQ) ||
">=" >> pure(DefinedOperator::IntrinsicOperator::GE) ||
">" >> pure(DefinedOperator::IntrinsicOperator::GT) ||
namedIntrinsicOperator};
// R609 defined-operator ->
// defined-unary-op | defined-binary-op | extended-intrinsic-op
TYPE_PARSER(construct<DefinedOperator>(intrinsicOperator) ||
construct<DefinedOperator>(definedOpName))
// R505 implicit-part -> [implicit-part-stmt]... implicit-stmt
// N.B. PARAMETER, FORMAT, & ENTRY statements that appear before any
// other kind of declaration-construct will be parsed into the
// implicit-part.
TYPE_CONTEXT_PARSER("implicit part"_en_US,
construct<ImplicitPart>(many(Parser<ImplicitPartStmt>{})))
// R506 implicit-part-stmt ->
// implicit-stmt | parameter-stmt | format-stmt | entry-stmt
TYPE_PARSER(first(
construct<ImplicitPartStmt>(statement(indirect(Parser<ImplicitStmt>{}))),
construct<ImplicitPartStmt>(statement(indirect(parameterStmt))),
construct<ImplicitPartStmt>(statement(indirect(oldParameterStmt))),
construct<ImplicitPartStmt>(statement(indirect(formatStmt))),
construct<ImplicitPartStmt>(statement(indirect(entryStmt))),
construct<ImplicitPartStmt>(indirect(compilerDirective)),
construct<ImplicitPartStmt>(indirect(openaccDeclarativeConstruct))))
// R512 internal-subprogram -> function-subprogram | subroutine-subprogram
// Internal subprograms are not program units, so their END statements
// can be followed by ';' and another statement on the same line.
TYPE_CONTEXT_PARSER("internal subprogram"_en_US,
(construct<InternalSubprogram>(indirect(functionSubprogram)) ||
construct<InternalSubprogram>(indirect(subroutineSubprogram))) /
forceEndOfStmt ||
construct<InternalSubprogram>(indirect(compilerDirective)))
// R511 internal-subprogram-part -> contains-stmt [internal-subprogram]...
TYPE_CONTEXT_PARSER("internal subprogram part"_en_US,
construct<InternalSubprogramPart>(statement(containsStmt),
many(StartNewSubprogram{} >> Parser<InternalSubprogram>{})))
// R605 literal-constant ->
// int-literal-constant | real-literal-constant |
// complex-literal-constant | logical-literal-constant |
// char-literal-constant | boz-literal-constant |
// unsigned-literal-constant
TYPE_PARSER(
first(construct<LiteralConstant>(Parser<HollerithLiteralConstant>{}),
construct<LiteralConstant>(realLiteralConstant),
construct<LiteralConstant>(intLiteralConstant),
construct<LiteralConstant>(Parser<ComplexLiteralConstant>{}),
construct<LiteralConstant>(Parser<BOZLiteralConstant>{}),
construct<LiteralConstant>(charLiteralConstant),
construct<LiteralConstant>(Parser<LogicalLiteralConstant>{}),
construct<LiteralConstant>(unsignedLiteralConstant)))
// R606 named-constant -> name
TYPE_PARSER(construct<NamedConstant>(name))
// R701 type-param-value -> scalar-int-expr | * | :
TYPE_PARSER(construct<TypeParamValue>(scalarIntExpr) ||
construct<TypeParamValue>(star) ||
construct<TypeParamValue>(construct<TypeParamValue::Deferred>(":"_tok)))
// R702 type-spec -> intrinsic-type-spec | derived-type-spec
// N.B. This type-spec production is one of two instances in the Fortran
// grammar where intrinsic types and bare derived type names can clash;
// the other is below in R703 declaration-type-spec. Look-ahead is required
// to disambiguate the cases where a derived type name begins with the name
// of an intrinsic type, e.g., REALITY.
TYPE_CONTEXT_PARSER("type spec"_en_US,
construct<TypeSpec>(intrinsicTypeSpec / lookAhead("::"_tok || ")"_tok)) ||
construct<TypeSpec>(derivedTypeSpec))
// R703 declaration-type-spec ->
// intrinsic-type-spec | TYPE ( intrinsic-type-spec ) |
// TYPE ( derived-type-spec ) | CLASS ( derived-type-spec ) |
// CLASS ( * ) | TYPE ( * )
// N.B. It is critical to distribute "parenthesized()" over the alternatives
// for TYPE (...), rather than putting the alternatives within it, which
// would fail on "TYPE(real_derived)" with a misrecognition of "real" as an
// intrinsic-type-spec.
// N.B. TYPE(x) is a derived type if x is a one-word extension intrinsic
// type (BYTE or DOUBLECOMPLEX), not the extension intrinsic type.
TYPE_CONTEXT_PARSER("declaration type spec"_en_US,
construct<DeclarationTypeSpec>(intrinsicTypeSpec) ||
"TYPE" >>
(parenthesized(construct<DeclarationTypeSpec>(
!"DOUBLECOMPLEX"_tok >> !"BYTE"_tok >> intrinsicTypeSpec)) ||
parenthesized(construct<DeclarationTypeSpec>(
construct<DeclarationTypeSpec::Type>(derivedTypeSpec))) ||
construct<DeclarationTypeSpec>(
"( * )" >> construct<DeclarationTypeSpec::TypeStar>())) ||
"CLASS" >> parenthesized(construct<DeclarationTypeSpec>(
construct<DeclarationTypeSpec::Class>(
derivedTypeSpec)) ||
construct<DeclarationTypeSpec>("*" >>
construct<DeclarationTypeSpec::ClassStar>())) ||
extension<LanguageFeature::DECStructures>(
"nonstandard usage: STRUCTURE"_port_en_US,
construct<DeclarationTypeSpec>(
// As is also done for the STRUCTURE statement, the name of
// the structure includes the surrounding slashes to avoid
// name clashes.
construct<DeclarationTypeSpec::Record>(
"RECORD" >> sourced("/" >> name / "/")))) ||
construct<DeclarationTypeSpec>(vectorTypeSpec))
// R704 intrinsic-type-spec ->
// integer-type-spec | REAL [kind-selector] | DOUBLE PRECISION |
// COMPLEX [kind-selector] | CHARACTER [char-selector] |
// LOGICAL [kind-selector]
// Extensions: DOUBLE COMPLEX, BYTE
TYPE_CONTEXT_PARSER("intrinsic type spec"_en_US,
first(construct<IntrinsicTypeSpec>(integerTypeSpec),
construct<IntrinsicTypeSpec>(
construct<IntrinsicTypeSpec::Real>("REAL" >> maybe(kindSelector))),
construct<IntrinsicTypeSpec>("DOUBLE PRECISION" >>
construct<IntrinsicTypeSpec::DoublePrecision>()),
construct<IntrinsicTypeSpec>(construct<IntrinsicTypeSpec::Complex>(
"COMPLEX" >> maybe(kindSelector))),
construct<IntrinsicTypeSpec>(construct<IntrinsicTypeSpec::Character>(
"CHARACTER" >> maybe(Parser<CharSelector>{}))),
construct<IntrinsicTypeSpec>(construct<IntrinsicTypeSpec::Logical>(
"LOGICAL" >> maybe(kindSelector))),
construct<IntrinsicTypeSpec>(unsignedTypeSpec),
extension<LanguageFeature::DoubleComplex>(
"nonstandard usage: DOUBLE COMPLEX"_port_en_US,
construct<IntrinsicTypeSpec>("DOUBLE COMPLEX"_sptok >>
construct<IntrinsicTypeSpec::DoubleComplex>())),
extension<LanguageFeature::Byte>("nonstandard usage: BYTE"_port_en_US,
construct<IntrinsicTypeSpec>(construct<IntegerTypeSpec>(
"BYTE" >> construct<std::optional<KindSelector>>(pure(1)))))))
// Extension: Vector type
// VECTOR(intrinsic-type-spec) | __VECTOR_PAIR | __VECTOR_QUAD
TYPE_CONTEXT_PARSER("vector type spec"_en_US,
extension<LanguageFeature::PPCVector>(
"nonstandard usage: Vector type"_port_en_US,
first(construct<VectorTypeSpec>(intrinsicVectorTypeSpec),
construct<VectorTypeSpec>("__VECTOR_PAIR" >>
construct<VectorTypeSpec::PairVectorTypeSpec>()),
construct<VectorTypeSpec>("__VECTOR_QUAD" >>
construct<VectorTypeSpec::QuadVectorTypeSpec>()))))
// VECTOR(integer-type-spec) | VECTOR(real-type-spec) |
// VECTOR(unsigned-type-spec) |
TYPE_PARSER(construct<IntrinsicVectorTypeSpec>("VECTOR" >>
parenthesized(construct<VectorElementType>(integerTypeSpec) ||
construct<VectorElementType>(unsignedTypeSpec) ||
construct<VectorElementType>(construct<IntrinsicTypeSpec::Real>(
"REAL" >> maybe(kindSelector))))))
// UNSIGNED type
TYPE_PARSER(construct<UnsignedTypeSpec>("UNSIGNED" >> maybe(kindSelector)))
// R705 integer-type-spec -> INTEGER [kind-selector]
TYPE_PARSER(construct<IntegerTypeSpec>("INTEGER" >> maybe(kindSelector)))
// R706 kind-selector -> ( [KIND =] scalar-int-constant-expr )
// Legacy extension: kind-selector -> * digit-string
TYPE_PARSER(construct<KindSelector>(
parenthesized(maybe("KIND ="_tok) >> scalarIntConstantExpr)) ||
extension<LanguageFeature::StarKind>(
"nonstandard usage: TYPE*KIND syntax"_port_en_US,
construct<KindSelector>(construct<KindSelector::StarSize>(
"*" >> digitString64 / spaceCheck))))
constexpr auto noSpace{
recovery(withMessage("invalid space"_err_en_US, !" "_ch), space)};
// R707 signed-int-literal-constant -> [sign] int-literal-constant
TYPE_PARSER(sourced(
construct<SignedIntLiteralConstant>(SignedIntLiteralConstantWithoutKind{},
maybe(noSpace >> underscore >> noSpace >> kindParam))))
// R708 int-literal-constant -> digit-string [_ kind-param]
// The negated look-ahead for a trailing underscore prevents misrecognition
// when the digit string is a numeric kind parameter of a character literal.
TYPE_PARSER(construct<IntLiteralConstant>(space >> digitString / !"u"_ch,
maybe(underscore >> noSpace >> kindParam) / !underscore))
// unsigned-literal-constant -> digit-string U [_ kind-param]
TYPE_PARSER(construct<UnsignedLiteralConstant>(space >> digitString / "u"_ch,
maybe(underscore >> noSpace >> kindParam) / !underscore))
// R709 kind-param -> digit-string | scalar-int-constant-name
TYPE_PARSER(construct<KindParam>(digitString64) ||
construct<KindParam>(
scalar(integer(constant(sourced(rawName >> construct<Name>()))))))
// R712 sign -> + | -
// N.B. A sign constitutes a whole token, so a space is allowed in free form
// after the sign and before a real-literal-constant or
// complex-literal-constant. A sign is not a unary operator in these contexts.
constexpr auto sign{
"+"_tok >> pure(Sign::Positive) || "-"_tok >> pure(Sign::Negative)};
// R713 signed-real-literal-constant -> [sign] real-literal-constant
constexpr auto signedRealLiteralConstant{
construct<SignedRealLiteralConstant>(maybe(sign), realLiteralConstant)};
// R714 real-literal-constant ->
// significand [exponent-letter exponent] [_ kind-param] |
// digit-string exponent-letter exponent [_ kind-param]
// R715 significand -> digit-string . [digit-string] | . digit-string
// R716 exponent-letter -> E | D
// Extension: Q
// R717 exponent -> signed-digit-string
constexpr auto exponentPart{
("ed"_ch ||
extension<LanguageFeature::QuadPrecision>(
"nonstandard usage: Q exponent"_port_en_US, "q"_ch)) >>
SignedDigitString{}};
TYPE_CONTEXT_PARSER("REAL literal constant"_en_US,
space >>
construct<RealLiteralConstant>(
sourced((digitString >> "."_ch >>
!(some(letter) >>
"."_ch /* don't misinterpret 1.AND. */) >>
maybe(digitString) >> maybe(exponentPart) >> ok ||
"."_ch >> digitString >> maybe(exponentPart) >> ok ||
digitString >> exponentPart >> ok) >>
construct<RealLiteralConstant::Real>()),
maybe(noSpace >> underscore >> noSpace >> kindParam)))
// R718 complex-literal-constant -> ( real-part , imag-part )
TYPE_CONTEXT_PARSER("COMPLEX literal constant"_en_US,
parenthesized(construct<ComplexLiteralConstant>(
Parser<ComplexPart>{} / ",", Parser<ComplexPart>{})))
// PGI/Intel extension: signed complex literal constant
TYPE_PARSER(construct<SignedComplexLiteralConstant>(
sign, Parser<ComplexLiteralConstant>{}))
// R719 real-part ->
// signed-int-literal-constant | signed-real-literal-constant |
// named-constant
// R720 imag-part ->
// signed-int-literal-constant | signed-real-literal-constant |
// named-constant
TYPE_PARSER(construct<ComplexPart>(signedRealLiteralConstant) ||
construct<ComplexPart>(signedIntLiteralConstant) ||
construct<ComplexPart>(namedConstant))
// R721 char-selector ->
// length-selector |
// ( LEN = type-param-value , KIND = scalar-int-constant-expr ) |
// ( type-param-value , [KIND =] scalar-int-constant-expr ) |
// ( KIND = scalar-int-constant-expr [, LEN = type-param-value] )
TYPE_PARSER(construct<CharSelector>(Parser<LengthSelector>{}) ||
parenthesized(construct<CharSelector>(
"LEN =" >> typeParamValue, ", KIND =" >> scalarIntConstantExpr)) ||
parenthesized(construct<CharSelector>(
typeParamValue / ",", maybe("KIND ="_tok) >> scalarIntConstantExpr)) ||
parenthesized(construct<CharSelector>(
"KIND =" >> scalarIntConstantExpr, maybe(", LEN =" >> typeParamValue))))
// R722 length-selector -> ( [LEN =] type-param-value ) | * char-length [,]
// N.B. The trailing [,] in the production is permitted by the Standard
// only in the context of a type-declaration-stmt, but even with that
// limitation, it would seem to be unnecessary and buggy to consume the comma
// here.
TYPE_PARSER(construct<LengthSelector>(
parenthesized(maybe("LEN ="_tok) >> typeParamValue)) ||
construct<LengthSelector>("*" >> charLength /* / maybe(","_tok) */))
// R723 char-length -> ( type-param-value ) | digit-string
TYPE_PARSER(construct<CharLength>(parenthesized(typeParamValue)) ||
construct<CharLength>(space >> digitString64 / spaceCheck))
// R724 char-literal-constant ->
// [kind-param _] ' [rep-char]... ' |
// [kind-param _] " [rep-char]... "
// "rep-char" is any non-control character. Doubled interior quotes are
// combined. Backslash escapes can be enabled.
// N.B. the parsing of "kind-param" takes care to not consume the '_'.
TYPE_CONTEXT_PARSER("CHARACTER literal constant"_en_US,
construct<CharLiteralConstant>(
kindParam / underscore, charLiteralConstantWithoutKind) ||
construct<CharLiteralConstant>(construct<std::optional<KindParam>>(),
space >> charLiteralConstantWithoutKind))
TYPE_CONTEXT_PARSER(
"Hollerith"_en_US, construct<HollerithLiteralConstant>(rawHollerithLiteral))
// R725 logical-literal-constant ->
// .TRUE. [_ kind-param] | .FALSE. [_ kind-param]
// Also accept .T. and .F. as extensions.
TYPE_PARSER(construct<LogicalLiteralConstant>(logicalTRUE,
maybe(noSpace >> underscore >> noSpace >> kindParam)) ||
construct<LogicalLiteralConstant>(
logicalFALSE, maybe(noSpace >> underscore >> noSpace >> kindParam)))
// R726 derived-type-def ->
// derived-type-stmt [type-param-def-stmt]...
// [private-or-sequence]... [component-part]
// [type-bound-procedure-part] end-type-stmt
// R735 component-part -> [component-def-stmt]...
TYPE_CONTEXT_PARSER("derived type definition"_en_US,
construct<DerivedTypeDef>(statement(Parser<DerivedTypeStmt>{}),
many(unambiguousStatement(Parser<TypeParamDefStmt>{})),
many(statement(Parser<PrivateOrSequence>{})),
many(inContext("component"_en_US,
unambiguousStatement(Parser<ComponentDefStmt>{}))),
maybe(Parser<TypeBoundProcedurePart>{}),
statement(Parser<EndTypeStmt>{})))
// R727 derived-type-stmt ->
// TYPE [[, type-attr-spec-list] ::] type-name [(
// type-param-name-list )]
TYPE_CONTEXT_PARSER("TYPE statement"_en_US,
construct<DerivedTypeStmt>(
"TYPE" >> optionalListBeforeColons(Parser<TypeAttrSpec>{}), name,
defaulted(parenthesized(nonemptyList(name)))))
// R728 type-attr-spec ->
// ABSTRACT | access-spec | BIND(C) | EXTENDS ( parent-type-name )
TYPE_PARSER(construct<TypeAttrSpec>(construct<Abstract>("ABSTRACT"_tok)) ||
construct<TypeAttrSpec>(construct<TypeAttrSpec::BindC>("BIND ( C )"_tok)) ||
construct<TypeAttrSpec>(
construct<TypeAttrSpec::Extends>("EXTENDS" >> parenthesized(name))) ||
construct<TypeAttrSpec>(accessSpec))
// R729 private-or-sequence -> private-components-stmt | sequence-stmt
TYPE_PARSER(construct<PrivateOrSequence>(Parser<PrivateStmt>{}) ||
construct<PrivateOrSequence>(Parser<SequenceStmt>{}))
// R730 end-type-stmt -> END TYPE [type-name]
TYPE_PARSER(construct<EndTypeStmt>(
recovery("END TYPE" >> maybe(name), namedConstructEndStmtErrorRecovery)))
// R731 sequence-stmt -> SEQUENCE
TYPE_PARSER(construct<SequenceStmt>("SEQUENCE"_tok))
// R732 type-param-def-stmt ->
// integer-type-spec , type-param-attr-spec :: type-param-decl-list
// R734 type-param-attr-spec -> KIND | LEN
constexpr auto kindOrLen{"KIND" >> pure(common::TypeParamAttr::Kind) ||
"LEN" >> pure(common::TypeParamAttr::Len)};
TYPE_PARSER(construct<TypeParamDefStmt>(integerTypeSpec / ",", kindOrLen,
"::" >> nonemptyList("expected type parameter declarations"_err_en_US,
Parser<TypeParamDecl>{})))
// R733 type-param-decl -> type-param-name [= scalar-int-constant-expr]
TYPE_PARSER(construct<TypeParamDecl>(name, maybe("=" >> scalarIntConstantExpr)))
// R736 component-def-stmt -> data-component-def-stmt |
// proc-component-def-stmt
// Accidental extension not enabled here: PGI accepts type-param-def-stmt in
// component-part of derived-type-def.
TYPE_PARSER(recovery(
withMessage("expected component definition"_err_en_US,
first(construct<ComponentDefStmt>(Parser<DataComponentDefStmt>{}),
construct<ComponentDefStmt>(Parser<ProcComponentDefStmt>{}),
construct<ComponentDefStmt>(indirect(compilerDirective)))),
construct<ComponentDefStmt>(inStmtErrorRecovery)))
// R737 data-component-def-stmt ->
// declaration-type-spec [[, component-attr-spec-list] ::]
// component-decl-list
// N.B. The standard requires double colons if there's an initializer.
TYPE_PARSER(construct<DataComponentDefStmt>(declarationTypeSpec,
optionalListBeforeColons(Parser<ComponentAttrSpec>{}),
nonemptyList("expected component declarations"_err_en_US,
Parser<ComponentOrFill>{})))
// R738 component-attr-spec ->
// access-spec | ALLOCATABLE |
// CODIMENSION lbracket coarray-spec rbracket |
// CONTIGUOUS | DIMENSION ( component-array-spec ) | POINTER |
// CUDA-data-attr
TYPE_PARSER(construct<ComponentAttrSpec>(accessSpec) ||
construct<ComponentAttrSpec>(allocatable) ||
construct<ComponentAttrSpec>("CODIMENSION" >> coarraySpec) ||
construct<ComponentAttrSpec>(contiguous) ||
construct<ComponentAttrSpec>("DIMENSION" >> componentArraySpec) ||
construct<ComponentAttrSpec>(pointer) ||
extension<LanguageFeature::CUDA>(
construct<ComponentAttrSpec>(Parser<common::CUDADataAttr>{})) ||
construct<ComponentAttrSpec>(recovery(
fail<ErrorRecovery>(
"type parameter definitions must appear before component declarations"_err_en_US),
kindOrLen >> construct<ErrorRecovery>())))
// R739 component-decl ->
// component-name [( component-array-spec )]
// [lbracket coarray-spec rbracket] [* char-length]
// [component-initialization] |
// (ext.) component-name *char-length [(component-array-spec)]
// [lbracket coarray-spec rbracket] [* char-length]
// [component-initialization]
TYPE_CONTEXT_PARSER("component declaration"_en_US,
construct<ComponentDecl>(name, "*" >> charLength, maybe(componentArraySpec),
maybe(coarraySpec), maybe(initialization)) ||
construct<ComponentDecl>(name, maybe(componentArraySpec),
maybe(coarraySpec), maybe("*" >> charLength),
maybe(initialization)))
// The source field of the Name will be replaced with a distinct generated name.
TYPE_CONTEXT_PARSER("%FILL item"_en_US,
extension<LanguageFeature::DECStructures>(
"nonstandard usage: %FILL"_port_en_US,
construct<FillDecl>(space >> sourced("%FILL" >> construct<Name>()),
maybe(componentArraySpec), maybe("*" >> charLength))))
TYPE_PARSER(construct<ComponentOrFill>(Parser<ComponentDecl>{}) ||
construct<ComponentOrFill>(Parser<FillDecl>{}))
// R740 component-array-spec ->
// explicit-shape-spec-list | deferred-shape-spec-list
// N.B. Parenthesized here rather than around references to this production.
TYPE_PARSER(construct<ComponentArraySpec>(parenthesized(
nonemptyList("expected explicit shape specifications"_err_en_US,
explicitShapeSpec))) ||
construct<ComponentArraySpec>(parenthesized(deferredShapeSpecList)))
// R741 proc-component-def-stmt ->
// PROCEDURE ( [proc-interface] ) , proc-component-attr-spec-list
// :: proc-decl-list
TYPE_CONTEXT_PARSER("PROCEDURE component definition statement"_en_US,
construct<ProcComponentDefStmt>(
"PROCEDURE" >> parenthesized(maybe(procInterface)),
localRecovery("expected PROCEDURE component attributes"_err_en_US,
"," >> nonemptyList(Parser<ProcComponentAttrSpec>{}), ok),
localRecovery("expected PROCEDURE declarations"_err_en_US,
"::" >> nonemptyList(procDecl), SkipTo<'\n'>{})))
// R742 proc-component-attr-spec ->
// access-spec | NOPASS | PASS [(arg-name)] | POINTER
constexpr auto noPass{construct<NoPass>("NOPASS"_tok)};
constexpr auto pass{construct<Pass>("PASS" >> maybe(parenthesized(name)))};
TYPE_PARSER(construct<ProcComponentAttrSpec>(accessSpec) ||
construct<ProcComponentAttrSpec>(noPass) ||
construct<ProcComponentAttrSpec>(pass) ||
construct<ProcComponentAttrSpec>(pointer))
// R744 initial-data-target -> designator
constexpr auto initialDataTarget{indirect(designator)};
// R743 component-initialization ->
// = constant-expr | => null-init | => initial-data-target
// R805 initialization ->
// = constant-expr | => null-init | => initial-data-target
// Universal extension: initialization -> / data-stmt-value-list /
TYPE_PARSER(construct<Initialization>("=>" >> nullInit) ||
construct<Initialization>("=>" >> initialDataTarget) ||
construct<Initialization>("=" >> constantExpr) ||
extension<LanguageFeature::SlashInitialization>(
"nonstandard usage: /initialization/"_port_en_US,
construct<Initialization>(
"/" >> nonemptyList("expected values"_err_en_US,
indirect(Parser<DataStmtValue>{})) /
"/")))
// R745 private-components-stmt -> PRIVATE
// R747 binding-private-stmt -> PRIVATE
TYPE_PARSER(construct<PrivateStmt>("PRIVATE"_tok))
// R746 type-bound-procedure-part ->
// contains-stmt [binding-private-stmt] [type-bound-proc-binding]...
TYPE_CONTEXT_PARSER("type bound procedure part"_en_US,
construct<TypeBoundProcedurePart>(statement(containsStmt),
maybe(statement(Parser<PrivateStmt>{})),
many(statement(Parser<TypeBoundProcBinding>{}))))
// R748 type-bound-proc-binding ->
// type-bound-procedure-stmt | type-bound-generic-stmt |
// final-procedure-stmt
TYPE_CONTEXT_PARSER("type bound procedure binding"_en_US,
recovery(
first(construct<TypeBoundProcBinding>(Parser<TypeBoundProcedureStmt>{}),
construct<TypeBoundProcBinding>(Parser<TypeBoundGenericStmt>{}),
construct<TypeBoundProcBinding>(Parser<FinalProcedureStmt>{})),
construct<TypeBoundProcBinding>(
!"END"_tok >> SkipTo<'\n'>{} >> construct<ErrorRecovery>())))
// R749 type-bound-procedure-stmt ->
// PROCEDURE [[, bind-attr-list] ::] type-bound-proc-decl-list |
// PROCEDURE ( interface-name ) , bind-attr-list :: binding-name-list
// The "::" is required by the standard (C768) in the first production if
// any type-bound-proc-decl has a "=>', but it's not strictly necessary to
// avoid a bad parse.
TYPE_CONTEXT_PARSER("type bound PROCEDURE statement"_en_US,
"PROCEDURE" >>
(construct<TypeBoundProcedureStmt>(
construct<TypeBoundProcedureStmt::WithInterface>(
parenthesized(name),
localRecovery("expected list of binding attributes"_err_en_US,
"," >> nonemptyList(Parser<BindAttr>{}), ok),
localRecovery("expected list of binding names"_err_en_US,
"::" >> listOfNames, SkipTo<'\n'>{}))) ||
construct<TypeBoundProcedureStmt>(construct<
TypeBoundProcedureStmt::WithoutInterface>(
pure<std::list<BindAttr>>(),
nonemptyList(
"expected type bound procedure declarations"_err_en_US,
construct<TypeBoundProcDecl>(name,
maybe(extension<LanguageFeature::MissingColons>(
"type-bound procedure statement should have '::' if it has '=>'"_port_en_US,
"=>" >> name)))))) ||
construct<TypeBoundProcedureStmt>(
construct<TypeBoundProcedureStmt::WithoutInterface>(
optionalListBeforeColons(Parser<BindAttr>{}),
nonemptyList(
"expected type bound procedure declarations"_err_en_US,
Parser<TypeBoundProcDecl>{})))))
// R750 type-bound-proc-decl -> binding-name [=> procedure-name]
TYPE_PARSER(construct<TypeBoundProcDecl>(name, maybe("=>" >> name)))
// R751 type-bound-generic-stmt ->
// GENERIC [, access-spec] :: generic-spec => binding-name-list
TYPE_CONTEXT_PARSER("type bound GENERIC statement"_en_US,
construct<TypeBoundGenericStmt>("GENERIC" >> maybe("," >> accessSpec),
"::" >> indirect(genericSpec), "=>" >> listOfNames))
// R752 bind-attr ->
// access-spec | DEFERRED | NON_OVERRIDABLE | NOPASS | PASS [(arg-name)]
TYPE_PARSER(construct<BindAttr>(accessSpec) ||
construct<BindAttr>(construct<BindAttr::Deferred>("DEFERRED"_tok)) ||
construct<BindAttr>(
construct<BindAttr::Non_Overridable>("NON_OVERRIDABLE"_tok)) ||
construct<BindAttr>(noPass) || construct<BindAttr>(pass))
// R753 final-procedure-stmt -> FINAL [::] final-subroutine-name-list
TYPE_CONTEXT_PARSER("FINAL statement"_en_US,
construct<FinalProcedureStmt>("FINAL" >> maybe("::"_tok) >> listOfNames))
// R754 derived-type-spec -> type-name [(type-param-spec-list)]
TYPE_PARSER(construct<DerivedTypeSpec>(name,
defaulted(parenthesized(nonemptyList(
"expected type parameters"_err_en_US, Parser<TypeParamSpec>{})))))
// R755 type-param-spec -> [keyword =] type-param-value
TYPE_PARSER(construct<TypeParamSpec>(maybe(keyword / "="), typeParamValue))
// R756 structure-constructor -> derived-type-spec ( [component-spec-list] )
TYPE_PARSER((construct<StructureConstructor>(derivedTypeSpec,
parenthesized(optionalList(Parser<ComponentSpec>{}))) ||
// This alternative corrects misrecognition of the
// component-spec-list as the type-param-spec-list in
// derived-type-spec.
construct<StructureConstructor>(
construct<DerivedTypeSpec>(
name, construct<std::list<TypeParamSpec>>()),
parenthesized(optionalList(Parser<ComponentSpec>{})))) /
!"("_tok)
// R757 component-spec -> [keyword =] component-data-source
TYPE_PARSER(construct<ComponentSpec>(
maybe(keyword / "="), Parser<ComponentDataSource>{}))
// R758 component-data-source -> expr | data-target | proc-target
TYPE_PARSER(construct<ComponentDataSource>(indirect(expr)))
// R759 enum-def ->
// enum-def-stmt enumerator-def-stmt [enumerator-def-stmt]...
// end-enum-stmt
TYPE_CONTEXT_PARSER("enum definition"_en_US,
construct<EnumDef>(statement(Parser<EnumDefStmt>{}),
some(unambiguousStatement(Parser<EnumeratorDefStmt>{})),
statement(Parser<EndEnumStmt>{})))
// R760 enum-def-stmt -> ENUM, BIND(C)
TYPE_PARSER(construct<EnumDefStmt>("ENUM , BIND ( C )"_tok))
// R761 enumerator-def-stmt -> ENUMERATOR [::] enumerator-list
TYPE_CONTEXT_PARSER("ENUMERATOR statement"_en_US,
construct<EnumeratorDefStmt>("ENUMERATOR" >> maybe("::"_tok) >>
nonemptyList("expected enumerators"_err_en_US, Parser<Enumerator>{})))
// R762 enumerator -> named-constant [= scalar-int-constant-expr]
TYPE_PARSER(
construct<Enumerator>(namedConstant, maybe("=" >> scalarIntConstantExpr)))
// R763 end-enum-stmt -> END ENUM
TYPE_PARSER(recovery("END ENUM"_tok, constructEndStmtErrorRecovery) >>
construct<EndEnumStmt>())
// R801 type-declaration-stmt ->
// declaration-type-spec [[, attr-spec]... ::] entity-decl-list
constexpr auto entityDeclWithoutEqInit{
construct<EntityDecl>(name, "*" >> charLength, maybe(arraySpec),
maybe(coarraySpec), !"="_tok >> maybe(initialization)) ||
construct<EntityDecl>(name, maybe(arraySpec), maybe(coarraySpec),
maybe("*" >> charLength),
!"="_tok >>
maybe(initialization) /* old-style REAL A/0/ still works */)};
TYPE_PARSER(
construct<TypeDeclarationStmt>(declarationTypeSpec,
defaulted("," >> nonemptyList(Parser<AttrSpec>{})) / "::",
nonemptyList("expected entity declarations"_err_en_US, entityDecl)) ||
// C806: no initializers allowed without colons ("REALA=1" is ambiguous)
construct<TypeDeclarationStmt>(declarationTypeSpec,
construct<std::list<AttrSpec>>(),
nonemptyList("expected entity declarations"_err_en_US,
entityDeclWithoutEqInit)) ||
// PGI-only extension: comma in place of doubled colons
extension<LanguageFeature::MissingColons>(
"nonstandard usage: ',' in place of '::'"_port_en_US,
construct<TypeDeclarationStmt>(declarationTypeSpec,
defaulted("," >> nonemptyList(Parser<AttrSpec>{})),
withMessage("expected entity declarations"_err_en_US,
"," >> nonemptyList(entityDecl)))))
// R802 attr-spec ->
// access-spec | ALLOCATABLE | ASYNCHRONOUS |
// CODIMENSION lbracket coarray-spec rbracket | CONTIGUOUS |
// DIMENSION ( array-spec ) | EXTERNAL | INTENT ( intent-spec ) |
// INTRINSIC | language-binding-spec | OPTIONAL | PARAMETER | POINTER |
// PROTECTED | SAVE | TARGET | VALUE | VOLATILE |
// CUDA-data-attr
TYPE_PARSER(construct<AttrSpec>(accessSpec) ||
construct<AttrSpec>(allocatable) ||
construct<AttrSpec>(construct<Asynchronous>("ASYNCHRONOUS"_tok)) ||
construct<AttrSpec>("CODIMENSION" >> coarraySpec) ||
construct<AttrSpec>(contiguous) ||
construct<AttrSpec>("DIMENSION" >> arraySpec) ||
construct<AttrSpec>(construct<External>("EXTERNAL"_tok)) ||
construct<AttrSpec>("INTENT" >> parenthesized(intentSpec)) ||
construct<AttrSpec>(construct<Intrinsic>("INTRINSIC"_tok)) ||
construct<AttrSpec>(languageBindingSpec) || construct<AttrSpec>(optional) ||
construct<AttrSpec>(construct<Parameter>("PARAMETER"_tok)) ||
construct<AttrSpec>(pointer) || construct<AttrSpec>(protectedAttr) ||
construct<AttrSpec>(save) ||
construct<AttrSpec>(construct<Target>("TARGET"_tok)) ||
construct<AttrSpec>(construct<Value>("VALUE"_tok)) ||
construct<AttrSpec>(construct<Volatile>("VOLATILE"_tok)) ||
extension<LanguageFeature::CUDA>(
construct<AttrSpec>(Parser<common::CUDADataAttr>{})))
// CUDA-data-attr ->
// CONSTANT | DEVICE | MANAGED | PINNED | SHARED | TEXTURE | UNIFIED
TYPE_PARSER("CONSTANT" >> pure(common::CUDADataAttr::Constant) ||
"DEVICE" >> pure(common::CUDADataAttr::Device) ||
"MANAGED" >> pure(common::CUDADataAttr::Managed) ||
"PINNED" >> pure(common::CUDADataAttr::Pinned) ||
"SHARED" >> pure(common::CUDADataAttr::Shared) ||
"TEXTURE" >> pure(common::CUDADataAttr::Texture) ||
"UNIFIED" >> pure(common::CUDADataAttr::Unified))
// R804 object-name -> name
constexpr auto objectName{name};
// R803 entity-decl ->
// object-name [( array-spec )] [lbracket coarray-spec rbracket]
// [* char-length] [initialization] |
// function-name [* char-length] |
// (ext.) object-name *char-length [(array-spec)]
// [lbracket coarray-spec rbracket] [initialization]
TYPE_PARSER(construct<EntityDecl>(objectName, "*" >> charLength,
maybe(arraySpec), maybe(coarraySpec), maybe(initialization)) ||
construct<EntityDecl>(objectName, maybe(arraySpec), maybe(coarraySpec),
maybe("*" >> charLength), maybe(initialization)))
// R806 null-init -> function-reference ... which must resolve to NULL()
TYPE_PARSER(lookAhead(name / "( )") >> construct<NullInit>(expr))
// R807 access-spec -> PUBLIC | PRIVATE
TYPE_PARSER(construct<AccessSpec>("PUBLIC" >> pure(AccessSpec::Kind::Public)) ||
construct<AccessSpec>("PRIVATE" >> pure(AccessSpec::Kind::Private)))
// R808 language-binding-spec ->
// BIND ( C [, NAME = scalar-default-char-constant-expr] )
// R1528 proc-language-binding-spec -> language-binding-spec
TYPE_PARSER(construct<LanguageBindingSpec>(
"BIND ( C" >> maybe(", NAME =" >> scalarDefaultCharConstantExpr),
(", CDEFINED" >> pure(true) || pure(false)) / ")"))
// R809 coarray-spec -> deferred-coshape-spec-list | explicit-coshape-spec
// N.B. Bracketed here rather than around references, for consistency with
// array-spec.
TYPE_PARSER(
construct<CoarraySpec>(bracketed(Parser<DeferredCoshapeSpecList>{})) ||
construct<CoarraySpec>(bracketed(Parser<ExplicitCoshapeSpec>{})))
// R810 deferred-coshape-spec -> :
// deferred-coshape-spec-list - just a list of colons
inline int listLength(std::list<Success> &&xs) { return xs.size(); }
TYPE_PARSER(construct<DeferredCoshapeSpecList>(
applyFunction(listLength, nonemptyList(":"_tok))))
// R811 explicit-coshape-spec ->
// [[lower-cobound :] upper-cobound ,]... [lower-cobound :] *
// R812 lower-cobound -> specification-expr
// R813 upper-cobound -> specification-expr
TYPE_PARSER(construct<ExplicitCoshapeSpec>(
many(explicitShapeSpec / ","), maybe(specificationExpr / ":") / "*"))
// R815 array-spec ->
// explicit-shape-spec-list | assumed-shape-spec-list |
// deferred-shape-spec-list | assumed-size-spec | implied-shape-spec |
// implied-shape-or-assumed-size-spec | assumed-rank-spec
// N.B. Parenthesized here rather than around references to avoid
// a need for forced look-ahead.
// Shape specs that could be deferred-shape-spec or assumed-shape-spec
// (e.g. '(:,:)') are parsed as the former.
TYPE_PARSER(
construct<ArraySpec>(parenthesized(nonemptyList(explicitShapeSpec))) ||
construct<ArraySpec>(parenthesized(deferredShapeSpecList)) ||
construct<ArraySpec>(
parenthesized(nonemptyList(Parser<AssumedShapeSpec>{}))) ||
construct<ArraySpec>(parenthesized(Parser<AssumedSizeSpec>{})) ||
construct<ArraySpec>(parenthesized(Parser<ImpliedShapeSpec>{})) ||
construct<ArraySpec>(parenthesized(Parser<AssumedRankSpec>{})))
// R816 explicit-shape-spec -> [lower-bound :] upper-bound
// R817 lower-bound -> specification-expr
// R818 upper-bound -> specification-expr
TYPE_PARSER(construct<ExplicitShapeSpec>(
maybe(specificationExpr / ":"), specificationExpr))
// R819 assumed-shape-spec -> [lower-bound] :
TYPE_PARSER(construct<AssumedShapeSpec>(maybe(specificationExpr) / ":"))
// R820 deferred-shape-spec -> :
// deferred-shape-spec-list - just a list of colons
TYPE_PARSER(construct<DeferredShapeSpecList>(
applyFunction(listLength, nonemptyList(":"_tok))))
// R821 assumed-implied-spec -> [lower-bound :] *
TYPE_PARSER(construct<AssumedImpliedSpec>(maybe(specificationExpr / ":") / "*"))
// R822 assumed-size-spec -> explicit-shape-spec-list , assumed-implied-spec
TYPE_PARSER(construct<AssumedSizeSpec>(
nonemptyList(explicitShapeSpec) / ",", assumedImpliedSpec))
// R823 implied-shape-or-assumed-size-spec -> assumed-implied-spec
// R824 implied-shape-spec -> assumed-implied-spec , assumed-implied-spec-list
// I.e., when the assumed-implied-spec-list has a single item, it constitutes an
// implied-shape-or-assumed-size-spec; otherwise, an implied-shape-spec.
TYPE_PARSER(construct<ImpliedShapeSpec>(nonemptyList(assumedImpliedSpec)))
// R825 assumed-rank-spec -> ..
TYPE_PARSER(construct<AssumedRankSpec>(".."_tok))
// R826 intent-spec -> IN | OUT | INOUT
TYPE_PARSER(construct<IntentSpec>("IN OUT" >> pure(IntentSpec::Intent::InOut) ||
"IN" >> pure(IntentSpec::Intent::In) ||
"OUT" >> pure(IntentSpec::Intent::Out)))
// R827 access-stmt -> access-spec [[::] access-id-list]
TYPE_PARSER(construct<AccessStmt>(accessSpec,
defaulted(maybe("::"_tok) >>
nonemptyList("expected names and generic specifications"_err_en_US,
Parser<AccessId>{}))))
// R828 access-id -> access-name | generic-spec
// "access-name" is ambiguous with "generic-spec"
TYPE_PARSER(construct<AccessId>(indirect(genericSpec)))
// R829 allocatable-stmt -> ALLOCATABLE [::] allocatable-decl-list
TYPE_PARSER(construct<AllocatableStmt>("ALLOCATABLE" >> maybe("::"_tok) >>
nonemptyList(
"expected object declarations"_err_en_US, Parser<ObjectDecl>{})))
// R830 allocatable-decl ->
// object-name [( array-spec )] [lbracket coarray-spec rbracket]
// R860 target-decl ->
// object-name [( array-spec )] [lbracket coarray-spec rbracket]
TYPE_PARSER(
construct<ObjectDecl>(objectName, maybe(arraySpec), maybe(coarraySpec)))
// R831 asynchronous-stmt -> ASYNCHRONOUS [::] object-name-list
TYPE_PARSER(construct<AsynchronousStmt>("ASYNCHRONOUS" >> maybe("::"_tok) >>
nonemptyList("expected object names"_err_en_US, objectName)))
// R832 bind-stmt -> language-binding-spec [::] bind-entity-list
TYPE_PARSER(construct<BindStmt>(languageBindingSpec / maybe("::"_tok),
nonemptyList("expected bind entities"_err_en_US, Parser<BindEntity>{})))
// R833 bind-entity -> entity-name | / common-block-name /
TYPE_PARSER(construct<BindEntity>(pure(BindEntity::Kind::Object), name) ||
construct<BindEntity>("/" >> pure(BindEntity::Kind::Common), name / "/"))
// R834 codimension-stmt -> CODIMENSION [::] codimension-decl-list
TYPE_PARSER(construct<CodimensionStmt>("CODIMENSION" >> maybe("::"_tok) >>
nonemptyList("expected codimension declarations"_err_en_US,
Parser<CodimensionDecl>{})))
// R835 codimension-decl -> coarray-name lbracket coarray-spec rbracket
TYPE_PARSER(construct<CodimensionDecl>(name, coarraySpec))
// R836 contiguous-stmt -> CONTIGUOUS [::] object-name-list
TYPE_PARSER(construct<ContiguousStmt>("CONTIGUOUS" >> maybe("::"_tok) >>
nonemptyList("expected object names"_err_en_US, objectName)))
// R837 data-stmt -> DATA data-stmt-set [[,] data-stmt-set]...
TYPE_CONTEXT_PARSER("DATA statement"_en_US,
construct<DataStmt>(
"DATA" >> nonemptySeparated(Parser<DataStmtSet>{}, maybe(","_tok))))
// R838 data-stmt-set -> data-stmt-object-list / data-stmt-value-list /
TYPE_PARSER(construct<DataStmtSet>(
nonemptyList(
"expected DATA statement objects"_err_en_US, Parser<DataStmtObject>{}),
withMessage("expected DATA statement value list"_err_en_US,
"/"_tok >> nonemptyList("expected DATA statement values"_err_en_US,
Parser<DataStmtValue>{})) /
"/"))
// R839 data-stmt-object -> variable | data-implied-do
TYPE_PARSER(construct<DataStmtObject>(indirect(variable)) ||
construct<DataStmtObject>(dataImpliedDo))
// R840 data-implied-do ->
// ( data-i-do-object-list , [integer-type-spec ::] data-i-do-variable
// = scalar-int-constant-expr , scalar-int-constant-expr
// [, scalar-int-constant-expr] )
// R842 data-i-do-variable -> do-variable
TYPE_PARSER(parenthesized(construct<DataImpliedDo>(
nonemptyList(Parser<DataIDoObject>{} / lookAhead(","_tok)) / ",",
maybe(integerTypeSpec / "::"), loopBounds(scalarIntConstantExpr))))
// R841 data-i-do-object ->
// array-element | scalar-structure-component | data-implied-do
TYPE_PARSER(construct<DataIDoObject>(scalar(indirect(designator))) ||
construct<DataIDoObject>(indirect(dataImpliedDo)))
// R843 data-stmt-value -> [data-stmt-repeat *] data-stmt-constant
TYPE_PARSER(construct<DataStmtValue>(
maybe(Parser<DataStmtRepeat>{} / "*"), Parser<DataStmtConstant>{}))
// R847 constant-subobject -> designator
// R846 int-constant-subobject -> constant-subobject
constexpr auto constantSubobject{constant(indirect(designator))};
// R844 data-stmt-repeat -> scalar-int-constant | scalar-int-constant-subobject
// R607 int-constant -> constant
// Factored into: constant -> literal-constant -> int-literal-constant
// The named-constant alternative of constant is subsumed by constant-subobject
TYPE_PARSER(construct<DataStmtRepeat>(intLiteralConstant) ||
construct<DataStmtRepeat>(scalar(integer(constantSubobject))))
// R845 data-stmt-constant ->
// scalar-constant | scalar-constant-subobject |
// signed-int-literal-constant | signed-real-literal-constant |
// null-init | initial-data-target |
// constant-structure-constructor
// N.B. scalar-constant and scalar-constant-subobject are ambiguous with
// initial-data-target; null-init and structure-constructor are ambiguous
// in the absence of parameters and components; structure-constructor with
// components can be ambiguous with a scalar-constant-subobject.
// So we parse literal constants, designator, null-init, and
// structure-constructor, so that semantics can figure things out later
// with the symbol table. A literal constant substring must be attempted
// first to avoid a partial match with a literal constant.
TYPE_PARSER(sourced(first(
construct<DataStmtConstant>(indirect(charLiteralConstantSubstring)),
construct<DataStmtConstant>(literalConstant),
construct<DataStmtConstant>(signedRealLiteralConstant),
construct<DataStmtConstant>(signedIntLiteralConstant),
extension<LanguageFeature::SignedComplexLiteral>(
"nonstandard usage: signed COMPLEX literal"_port_en_US,
construct<DataStmtConstant>(Parser<SignedComplexLiteralConstant>{})),
construct<DataStmtConstant>(nullInit),
construct<DataStmtConstant>(indirect(designator) / !"("_tok),
construct<DataStmtConstant>(Parser<StructureConstructor>{}))))
// R848 dimension-stmt ->
// DIMENSION [::] array-name ( array-spec )
// [, array-name ( array-spec )]...
TYPE_CONTEXT_PARSER("DIMENSION statement"_en_US,
construct<DimensionStmt>("DIMENSION" >> maybe("::"_tok) >>
nonemptyList("expected array specifications"_err_en_US,
construct<DimensionStmt::Declaration>(name, arraySpec))))
// R849 intent-stmt -> INTENT ( intent-spec ) [::] dummy-arg-name-list
TYPE_CONTEXT_PARSER("INTENT statement"_en_US,
construct<IntentStmt>(
"INTENT" >> parenthesized(intentSpec) / maybe("::"_tok), listOfNames))
// R850 optional-stmt -> OPTIONAL [::] dummy-arg-name-list
TYPE_PARSER(
construct<OptionalStmt>("OPTIONAL" >> maybe("::"_tok) >> listOfNames))
// R851 parameter-stmt -> PARAMETER ( named-constant-def-list )
// Legacy extension: omitted parentheses, no implicit typing from names
TYPE_CONTEXT_PARSER("PARAMETER statement"_en_US,
construct<ParameterStmt>(
"PARAMETER" >> parenthesized(nonemptyList(Parser<NamedConstantDef>{}))))
TYPE_CONTEXT_PARSER("old style PARAMETER statement"_en_US,
extension<LanguageFeature::OldStyleParameter>(
"nonstandard usage: PARAMETER without parentheses"_port_en_US,
construct<OldParameterStmt>(
"PARAMETER" >> nonemptyList(Parser<NamedConstantDef>{}))))
// R852 named-constant-def -> named-constant = constant-expr
TYPE_PARSER(construct<NamedConstantDef>(namedConstant, "=" >> constantExpr))
// R853 pointer-stmt -> POINTER [::] pointer-decl-list
TYPE_PARSER(construct<PointerStmt>("POINTER" >> maybe("::"_tok) >>
nonemptyList(
"expected pointer declarations"_err_en_US, Parser<PointerDecl>{})))
// R854 pointer-decl ->
// object-name [( deferred-shape-spec-list )] | proc-entity-name
TYPE_PARSER(
construct<PointerDecl>(name, maybe(parenthesized(deferredShapeSpecList))))
// R855 protected-stmt -> PROTECTED [::] entity-name-list
TYPE_PARSER(
construct<ProtectedStmt>("PROTECTED" >> maybe("::"_tok) >> listOfNames))
// R856 save-stmt -> SAVE [[::] saved-entity-list]
TYPE_PARSER(construct<SaveStmt>(
"SAVE" >> defaulted(maybe("::"_tok) >>