summaryrefslogtreecommitdiffstats
path: root/gfx/angle/src/compiler/translator/glslang.y
blob: c15dd9d6ef4d3597b8d83158665ae8c159be75ad (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
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
/*
//
// Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

This file contains the Yacc grammar for GLSL ES.
Based on ANSI C Yacc grammar:
http://www.lysator.liu.se/c/ANSI-C-grammar-y.html

IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN generate_parser.sh,
WHICH GENERATES THE GLSL ES PARSER (glslang_tab.cpp AND glslang_tab.h).
*/

%{
//
// Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// This file is auto-generated by generate_parser.sh. DO NOT EDIT!

// clang-format off

// Ignore errors in auto-generated code.
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wunused-function"
#pragma GCC diagnostic ignored "-Wunused-variable"
#pragma GCC diagnostic ignored "-Wswitch-enum"
#elif defined(_MSC_VER)
#pragma warning(disable: 4065)
#pragma warning(disable: 4189)
#pragma warning(disable: 4244)
#pragma warning(disable: 4505)
#pragma warning(disable: 4701)
#pragma warning(disable: 4702)
#endif

#include "angle_gl.h"
#include "compiler/translator/Cache.h"
#include "compiler/translator/SymbolTable.h"
#include "compiler/translator/ParseContext.h"
#include "GLSLANG/ShaderLang.h"

#define YYENABLE_NLS 0

using namespace sh;

%}
%expect 1 /* One shift reduce conflict because of if | else */
%parse-param {TParseContext* context}
%param   {void *scanner}
%define api.pure full
%locations

%code requires {
#define YYLTYPE TSourceLoc
#define YYLTYPE_IS_DECLARED 1
}

%union {
    struct {
        union {
            TString *string;
            float f;
            int i;
            unsigned int u;
            bool b;
        };
        TSymbol* symbol;
    } lex;
    struct {
        TOperator op;
        union {
            TIntermNode *intermNode;
            TIntermNodePair nodePair;
            TIntermTyped *intermTypedNode;
            TIntermAggregate *intermAggregate;
            TIntermBlock *intermBlock;
            TIntermDeclaration *intermDeclaration;
            TIntermSwitch *intermSwitch;
            TIntermCase *intermCase;
        };
        union {
            TTypeSpecifierNonArray typeSpecifierNonArray;
            TPublicType type;
            TPrecision precision;
            TLayoutQualifier layoutQualifier;
            TQualifier qualifier;
            TFunction *function;
            TParameter param;
            TField *field;
            TFieldList *fieldList;
            TQualifierWrapperBase *qualifierWrapper;
            TTypeQualifierBuilder *typeQualifierBuilder;
        };
    } interm;
}

%{
extern int yylex(YYSTYPE* yylval, YYLTYPE* yylloc, void* yyscanner);
extern void yyerror(YYLTYPE* yylloc, TParseContext* context, void *scanner, const char* reason);

#define YYLLOC_DEFAULT(Current, Rhs, N)                      \
  do {                                                       \
      if (N) {                                         \
        (Current).first_file = YYRHSLOC(Rhs, 1).first_file;  \
        (Current).first_line = YYRHSLOC(Rhs, 1).first_line;  \
        (Current).last_file = YYRHSLOC(Rhs, N).last_file;    \
        (Current).last_line = YYRHSLOC(Rhs, N).last_line;    \
      }                                                      \
      else {                                                 \
        (Current).first_file = YYRHSLOC(Rhs, 0).last_file;   \
        (Current).first_line = YYRHSLOC(Rhs, 0).last_line;   \
        (Current).last_file = YYRHSLOC(Rhs, 0).last_file;    \
        (Current).last_line = YYRHSLOC(Rhs, 0).last_line;    \
      }                                                      \
  } while (0)

#define VERTEX_ONLY(S, L) {  \
    if (context->getShaderType() != GL_VERTEX_SHADER) {  \
        context->error(L, " supported in vertex shaders only ", S);  \
    }  \
}

#define FRAG_ONLY(S, L) {  \
    if (context->getShaderType() != GL_FRAGMENT_SHADER) {  \
        context->error(L, " supported in fragment shaders only ", S);  \
    }  \
}

#define COMPUTE_ONLY(S, L) {  \
    if (context->getShaderType() != GL_COMPUTE_SHADER) {  \
        context->error(L, " supported in compute shaders only ", S);  \
    }  \
}

#define NON_COMPUTE_ONLY(S, L) {  \
    if (context->getShaderType() != GL_VERTEX_SHADER && context->getShaderType() != GL_FRAGMENT_SHADER) {  \
        context->error(L, " supported in vertex and fragment shaders only ", S);  \
    }  \
}

#define ES2_ONLY(S, L) {  \
    if (context->getShaderVersion() != 100) {  \
        context->error(L, " supported in GLSL ES 1.00 only ", S);  \
    }  \
}

#define ES3_OR_NEWER(TOKEN, LINE, REASON) {  \
    if (context->getShaderVersion() < 300) {  \
        context->error(LINE, REASON " supported in GLSL ES 3.00 and above only ", TOKEN);  \
    }  \
}

#define ES3_1_ONLY(TOKEN, LINE, REASON) {  \
    if (context->getShaderVersion() != 310) {  \
        context->error(LINE, REASON " supported in GLSL ES 3.10 only ", TOKEN);  \
    }  \
}
%}

%token <lex> INVARIANT HIGH_PRECISION MEDIUM_PRECISION LOW_PRECISION PRECISION
%token <lex> ATTRIBUTE CONST_QUAL BOOL_TYPE FLOAT_TYPE INT_TYPE UINT_TYPE
%token <lex> BREAK CONTINUE DO ELSE FOR IF DISCARD RETURN SWITCH CASE DEFAULT
%token <lex> BVEC2 BVEC3 BVEC4 IVEC2 IVEC3 IVEC4 VEC2 VEC3 VEC4 UVEC2 UVEC3 UVEC4
%token <lex> MATRIX2 MATRIX3 MATRIX4 IN_QUAL OUT_QUAL INOUT_QUAL UNIFORM VARYING
%token <lex> MATRIX2x3 MATRIX3x2 MATRIX2x4 MATRIX4x2 MATRIX3x4 MATRIX4x3
%token <lex> CENTROID FLAT SMOOTH
%token <lex> READONLY WRITEONLY COHERENT RESTRICT VOLATILE
%token <lex> STRUCT VOID_TYPE WHILE
%token <lex> SAMPLER2D SAMPLERCUBE SAMPLER_EXTERNAL_OES SAMPLER2DRECT SAMPLER2DARRAY
%token <lex> ISAMPLER2D ISAMPLER3D ISAMPLERCUBE ISAMPLER2DARRAY
%token <lex> USAMPLER2D USAMPLER3D USAMPLERCUBE USAMPLER2DARRAY
%token <lex> SAMPLER3D SAMPLER3DRECT SAMPLER2DSHADOW SAMPLERCUBESHADOW SAMPLER2DARRAYSHADOW
%token <lex> IMAGE2D IIMAGE2D UIMAGE2D IMAGE3D IIMAGE3D UIMAGE3D IMAGE2DARRAY IIMAGE2DARRAY UIMAGE2DARRAY
%token <lex> IMAGECUBE IIMAGECUBE UIMAGECUBE
%token <lex> LAYOUT

%token <lex> IDENTIFIER TYPE_NAME FLOATCONSTANT INTCONSTANT UINTCONSTANT BOOLCONSTANT
%token <lex> FIELD_SELECTION
%token <lex> LEFT_OP RIGHT_OP
%token <lex> INC_OP DEC_OP LE_OP GE_OP EQ_OP NE_OP
%token <lex> AND_OP OR_OP XOR_OP MUL_ASSIGN DIV_ASSIGN ADD_ASSIGN
%token <lex> MOD_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN XOR_ASSIGN OR_ASSIGN
%token <lex> SUB_ASSIGN

%token <lex> LEFT_PAREN RIGHT_PAREN LEFT_BRACKET RIGHT_BRACKET LEFT_BRACE RIGHT_BRACE DOT
%token <lex> COMMA COLON EQUAL SEMICOLON BANG DASH TILDE PLUS STAR SLASH PERCENT
%token <lex> LEFT_ANGLE RIGHT_ANGLE VERTICAL_BAR CARET AMPERSAND QUESTION

%type <lex> identifier
%type <interm> assignment_operator unary_operator
%type <interm.intermTypedNode> variable_identifier primary_expression postfix_expression
%type <interm.intermTypedNode> expression integer_expression assignment_expression
%type <interm.intermTypedNode> unary_expression multiplicative_expression additive_expression
%type <interm.intermTypedNode> relational_expression equality_expression
%type <interm.intermTypedNode> conditional_expression constant_expression
%type <interm.intermTypedNode> logical_or_expression logical_xor_expression logical_and_expression
%type <interm.intermTypedNode> shift_expression and_expression exclusive_or_expression inclusive_or_expression
%type <interm.intermTypedNode> function_call initializer condition conditionopt

%type <interm.intermBlock> translation_unit
%type <interm.intermNode> function_definition statement simple_statement
%type <interm.intermBlock> statement_list compound_statement compound_statement_no_new_scope
%type <interm.intermNode> declaration_statement selection_statement expression_statement
%type <interm.intermNode> declaration external_declaration
%type <interm.intermNode> for_init_statement
%type <interm.nodePair> selection_rest_statement for_rest_statement
%type <interm.intermSwitch> switch_statement
%type <interm.intermCase> case_label
%type <interm.intermNode> iteration_statement jump_statement statement_no_new_scope statement_with_scope
%type <interm> single_declaration init_declarator_list

%type <interm> parameter_declaration parameter_declarator parameter_type_specifier
%type <interm.layoutQualifier> layout_qualifier_id_list layout_qualifier_id

%type <interm.type> fully_specified_type type_specifier

%type <interm.precision> precision_qualifier
%type <interm.layoutQualifier> layout_qualifier
%type <interm.qualifier> interpolation_qualifier
%type <interm.qualifierWrapper> storage_qualifier single_type_qualifier invariant_qualifier
%type <interm.typeQualifierBuilder> type_qualifier

%type <interm.typeSpecifierNonArray> type_specifier_nonarray struct_specifier
%type <interm.type> type_specifier_no_prec
%type <interm.field> struct_declarator
%type <interm.fieldList> struct_declarator_list struct_declaration struct_declaration_list
%type <interm.function> function_header function_declarator function_identifier
%type <interm.function> function_header_with_parameters function_call_header
%type <interm> function_call_header_with_parameters function_call_header_no_parameters function_call_generic function_prototype
%type <interm> function_call_or_method

%type <lex> enter_struct

%start translation_unit
%%

identifier
    : IDENTIFIER
    | TYPE_NAME

variable_identifier
    : IDENTIFIER {
        // The symbol table search was done in the lexical phase
        $$ = context->parseVariableIdentifier(@1, $1.string, $1.symbol);

        // don't delete $1.string, it's used by error recovery, and the pool
        // pop will reclaim the memory
    }
    ;

primary_expression
    : variable_identifier {
        $$ = $1;
    }
    | INTCONSTANT {
        TConstantUnion *unionArray = new TConstantUnion[1];
        unionArray->setIConst($1.i);
        $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConst), @1);
    }
    | UINTCONSTANT {
        TConstantUnion *unionArray = new TConstantUnion[1];
        unionArray->setUConst($1.u);
        $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtUInt, EbpUndefined, EvqConst), @1);
    }
    | FLOATCONSTANT {
        TConstantUnion *unionArray = new TConstantUnion[1];
        unionArray->setFConst($1.f);
        $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpUndefined, EvqConst), @1);
    }
    | BOOLCONSTANT {
        TConstantUnion *unionArray = new TConstantUnion[1];
        unionArray->setBConst($1.b);
        $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @1);
    }
    | LEFT_PAREN expression RIGHT_PAREN {
        $$ = $2;
    }
    ;

postfix_expression
    : primary_expression {
        $$ = $1;
    }
    | postfix_expression LEFT_BRACKET integer_expression RIGHT_BRACKET {
        $$ = context->addIndexExpression($1, @2, $3);
    }
    | function_call {
        $$ = $1;
    }
    | postfix_expression DOT FIELD_SELECTION {
        $$ = context->addFieldSelectionExpression($1, @2, *$3.string, @3);
    }
    | postfix_expression INC_OP {
        $$ = context->addUnaryMathLValue(EOpPostIncrement, $1, @2);
    }
    | postfix_expression DEC_OP {
        $$ = context->addUnaryMathLValue(EOpPostDecrement, $1, @2);
    }
    ;

integer_expression
    : expression {
        context->checkIsScalarInteger($1, "[]");
        $$ = $1;
    }
    ;

function_call
    : function_call_or_method {
        bool fatalError = false;
        $$ = context->addFunctionCallOrMethod($1.function, $1.nodePair.node1, $1.nodePair.node2, @1, &fatalError);
        if (fatalError)
        {
            YYERROR;
        }
    }
    ;

function_call_or_method
    : function_call_generic {
        $$ = $1;
        $$.nodePair.node2 = nullptr;
    }
    | postfix_expression DOT function_call_generic {
        ES3_OR_NEWER("", @3, "methods");
        $$ = $3;
        $$.nodePair.node2 = $1;
    }
    ;

function_call_generic
    : function_call_header_with_parameters RIGHT_PAREN {
        $$ = $1;
    }
    | function_call_header_no_parameters RIGHT_PAREN {
        $$ = $1;
    }
    ;

function_call_header_no_parameters
    : function_call_header VOID_TYPE {
        $$.function = $1;
        $$.nodePair.node1 = nullptr;
    }
    | function_call_header {
        $$.function = $1;
        $$.nodePair.node1 = nullptr;
    }
    ;

function_call_header_with_parameters
    : function_call_header assignment_expression {
        const TType *type = new TType($2->getType());
        $1->addParameter(TConstParameter(type));
        $$.function = $1;
        $$.nodePair.node1 = TIntermediate::MakeAggregate($2, @2);
    }
    | function_call_header_with_parameters COMMA assignment_expression {
        const TType *type = new TType($3->getType());
        $1.function->addParameter(TConstParameter(type));
        $$.function = $1.function;
        $$.nodePair.node1 = context->intermediate.growAggregate($1.intermNode, $3, @2);
    }
    ;

function_call_header
    : function_identifier LEFT_PAREN {
        $$ = $1;
    }
    ;

// Grammar Note:  Constructors look like functions, but are recognized as types.

function_identifier
    : type_specifier_no_prec {
        if ($1.array) {
            ES3_OR_NEWER("[]", @1, "array constructor");
        }
        $$ = context->addConstructorFunc($1);
    }
    | IDENTIFIER {
        context->checkIsNotReserved(@1, *$1.string);
        const TType *type = TCache::getType(EbtVoid, EbpUndefined);
        TFunction *function = new TFunction($1.string, type);
        $$ = function;
    }
    | FIELD_SELECTION {
        context->checkIsNotReserved(@1, *$1.string);
        const TType *type = TCache::getType(EbtVoid, EbpUndefined);
        TFunction *function = new TFunction($1.string, type);
        $$ = function;
    }
    ;

unary_expression
    : postfix_expression {
        $$ = $1;
    }
    | INC_OP unary_expression {
        $$ = context->addUnaryMathLValue(EOpPreIncrement, $2, @1);
    }
    | DEC_OP unary_expression {
        $$ = context->addUnaryMathLValue(EOpPreDecrement, $2, @1);
    }
    | unary_operator unary_expression {
        if ($1.op != EOpNull) {
            $$ = context->addUnaryMath($1.op, $2, @1);
        } else
            $$ = $2;
    }
    ;
// Grammar Note:  No traditional style type casts.

unary_operator
    : PLUS  { $$.op = EOpPositive; }
    | DASH  { $$.op = EOpNegative; }
    | BANG  { $$.op = EOpLogicalNot; }
    | TILDE {
        ES3_OR_NEWER("~", @$, "bit-wise operator");
        $$.op = EOpBitwiseNot;
    }
    ;
// Grammar Note:  No '*' or '&' unary ops.  Pointers are not supported.

multiplicative_expression
    : unary_expression { $$ = $1; }
    | multiplicative_expression STAR unary_expression {
        $$ = context->addBinaryMath(EOpMul, $1, $3, @2);
    }
    | multiplicative_expression SLASH unary_expression {
        $$ = context->addBinaryMath(EOpDiv, $1, $3, @2);
    }
    | multiplicative_expression PERCENT unary_expression {
        ES3_OR_NEWER("%", @2, "integer modulus operator");
        $$ = context->addBinaryMath(EOpIMod, $1, $3, @2);
    }
    ;

additive_expression
    : multiplicative_expression { $$ = $1; }
    | additive_expression PLUS multiplicative_expression {
        $$ = context->addBinaryMath(EOpAdd, $1, $3, @2);
    }
    | additive_expression DASH multiplicative_expression {
        $$ = context->addBinaryMath(EOpSub, $1, $3, @2);
    }
    ;

shift_expression
    : additive_expression { $$ = $1; }
    | shift_expression LEFT_OP additive_expression {
        ES3_OR_NEWER("<<", @2, "bit-wise operator");
        $$ = context->addBinaryMath(EOpBitShiftLeft, $1, $3, @2);
    }
    | shift_expression RIGHT_OP additive_expression {
        ES3_OR_NEWER(">>", @2, "bit-wise operator");
        $$ = context->addBinaryMath(EOpBitShiftRight, $1, $3, @2);
    }
    ;

relational_expression
    : shift_expression { $$ = $1; }
    | relational_expression LEFT_ANGLE shift_expression {
        $$ = context->addBinaryMathBooleanResult(EOpLessThan, $1, $3, @2);
    }
    | relational_expression RIGHT_ANGLE shift_expression  {
        $$ = context->addBinaryMathBooleanResult(EOpGreaterThan, $1, $3, @2);
    }
    | relational_expression LE_OP shift_expression  {
        $$ = context->addBinaryMathBooleanResult(EOpLessThanEqual, $1, $3, @2);
    }
    | relational_expression GE_OP shift_expression  {
        $$ = context->addBinaryMathBooleanResult(EOpGreaterThanEqual, $1, $3, @2);
    }
    ;

equality_expression
    : relational_expression { $$ = $1; }
    | equality_expression EQ_OP relational_expression  {
        $$ = context->addBinaryMathBooleanResult(EOpEqual, $1, $3, @2);
    }
    | equality_expression NE_OP relational_expression {
        $$ = context->addBinaryMathBooleanResult(EOpNotEqual, $1, $3, @2);
    }
    ;

and_expression
    : equality_expression { $$ = $1; }
    | and_expression AMPERSAND equality_expression {
        ES3_OR_NEWER("&", @2, "bit-wise operator");
        $$ = context->addBinaryMath(EOpBitwiseAnd, $1, $3, @2);
    }
    ;

exclusive_or_expression
    : and_expression { $$ = $1; }
    | exclusive_or_expression CARET and_expression {
        ES3_OR_NEWER("^", @2, "bit-wise operator");
        $$ = context->addBinaryMath(EOpBitwiseXor, $1, $3, @2);
    }
    ;

inclusive_or_expression
    : exclusive_or_expression { $$ = $1; }
    | inclusive_or_expression VERTICAL_BAR exclusive_or_expression {
        ES3_OR_NEWER("|", @2, "bit-wise operator");
        $$ = context->addBinaryMath(EOpBitwiseOr, $1, $3, @2);
    }
    ;

logical_and_expression
    : inclusive_or_expression { $$ = $1; }
    | logical_and_expression AND_OP inclusive_or_expression {
        $$ = context->addBinaryMathBooleanResult(EOpLogicalAnd, $1, $3, @2);
    }
    ;

logical_xor_expression
    : logical_and_expression { $$ = $1; }
    | logical_xor_expression XOR_OP logical_and_expression  {
        $$ = context->addBinaryMathBooleanResult(EOpLogicalXor, $1, $3, @2);
    }
    ;

logical_or_expression
    : logical_xor_expression { $$ = $1; }
    | logical_or_expression OR_OP logical_xor_expression  {
        $$ = context->addBinaryMathBooleanResult(EOpLogicalOr, $1, $3, @2);
    }
    ;

conditional_expression
    : logical_or_expression { $$ = $1; }
    | logical_or_expression QUESTION expression COLON assignment_expression {
        $$ = context->addTernarySelection($1, $3, $5, @2);
    }
    ;

assignment_expression
    : conditional_expression { $$ = $1; }
    | unary_expression assignment_operator assignment_expression {
        context->checkCanBeLValue(@2, "assign", $1);
        $$ = context->addAssign($2.op, $1, $3, @2);
    }
    ;

assignment_operator
    : EQUAL        { $$.op = EOpAssign; }
    | MUL_ASSIGN   { $$.op = EOpMulAssign; }
    | DIV_ASSIGN   { $$.op = EOpDivAssign; }
    | MOD_ASSIGN   {
        ES3_OR_NEWER("%=", @$, "integer modulus operator");
        $$.op = EOpIModAssign;
    }
    | ADD_ASSIGN   { $$.op = EOpAddAssign; }
    | SUB_ASSIGN   { $$.op = EOpSubAssign; }
    | LEFT_ASSIGN {
        ES3_OR_NEWER("<<=", @$, "bit-wise operator");
        $$.op = EOpBitShiftLeftAssign;
    }
    | RIGHT_ASSIGN {
        ES3_OR_NEWER(">>=", @$, "bit-wise operator");
        $$.op = EOpBitShiftRightAssign;
    }
    | AND_ASSIGN {
        ES3_OR_NEWER("&=", @$, "bit-wise operator");
        $$.op = EOpBitwiseAndAssign;
    }
    | XOR_ASSIGN {
        ES3_OR_NEWER("^=", @$, "bit-wise operator");
        $$.op = EOpBitwiseXorAssign;
    }
    | OR_ASSIGN {
        ES3_OR_NEWER("|=", @$, "bit-wise operator");
        $$.op = EOpBitwiseOrAssign;
    }
    ;

expression
    : assignment_expression {
        $$ = $1;
    }
    | expression COMMA assignment_expression {
        $$ = context->addComma($1, $3, @2);
    }
    ;

constant_expression
    : conditional_expression {
        context->checkIsConst($1);
        $$ = $1;
    }
    ;

enter_struct
    : IDENTIFIER LEFT_BRACE {
        context->enterStructDeclaration(@1, *$1.string);
        $$ = $1;
    }
    ;

declaration
    : function_prototype SEMICOLON {
        $$ = context->addFunctionPrototypeDeclaration(*($1.function), @1);
    }
    | init_declarator_list SEMICOLON {
        $$ = $1.intermDeclaration;
    }
    | PRECISION precision_qualifier type_specifier_no_prec SEMICOLON {
        if (($2 == EbpHigh) && (context->getShaderType() == GL_FRAGMENT_SHADER) && !context->getFragmentPrecisionHigh()) {
            context->error(@1, "precision is not supported in fragment shader", "highp");
        }
        if (!context->symbolTable.setDefaultPrecision( $3, $2 )) {
            context->error(@1, "illegal type argument for default precision qualifier", getBasicString($3.getBasicType()));
        }
        $$ = 0;
    }
    | type_qualifier enter_struct struct_declaration_list RIGHT_BRACE SEMICOLON {
        ES3_OR_NEWER($2.string->c_str(), @1, "interface blocks");
        $$ = context->addInterfaceBlock(*$1, @2, *$2.string, $3, NULL, @$, NULL, @$);
    }
    | type_qualifier enter_struct struct_declaration_list RIGHT_BRACE IDENTIFIER SEMICOLON {
        ES3_OR_NEWER($2.string->c_str(), @1, "interface blocks");
        $$ = context->addInterfaceBlock(*$1, @2, *$2.string, $3, $5.string, @5, NULL, @$);
    }
    | type_qualifier enter_struct struct_declaration_list RIGHT_BRACE IDENTIFIER LEFT_BRACKET constant_expression RIGHT_BRACKET SEMICOLON {
        ES3_OR_NEWER($2.string->c_str(), @1, "interface blocks");
        $$ = context->addInterfaceBlock(*$1, @2, *$2.string, $3, $5.string, @5, $7, @6);
    }
    | type_qualifier SEMICOLON {
        context->parseGlobalLayoutQualifier(*$1);
        $$ = 0;
    }
    | type_qualifier IDENTIFIER SEMICOLON // e.g. to qualify an existing variable as invariant
    {
        $$ = context->parseInvariantDeclaration(*$1, @2, $2.string, $2.symbol);
    }
    ;

function_prototype
    : function_declarator RIGHT_PAREN  {
        $$.function = context->parseFunctionDeclarator(@2, $1);
        context->exitFunctionDeclaration();
    }
    ;

function_declarator
    : function_header {
        $$ = $1;
    }
    | function_header_with_parameters {
        $$ = $1;
    }
    ;


function_header_with_parameters
    : function_header parameter_declaration {
        // Add the parameter
        $$ = $1;
        if ($2.param.type->getBasicType() != EbtVoid)
            $1->addParameter($2.param.turnToConst());
        else
            delete $2.param.type;
    }
    | function_header_with_parameters COMMA parameter_declaration {
        //
        // Only first parameter of one-parameter functions can be void
        // The check for named parameters not being void is done in parameter_declarator
        //
        if ($3.param.type->getBasicType() == EbtVoid) {
            //
            // This parameter > first is void
            //
            context->error(@2, "cannot be an argument type except for '(void)'", "void");
            delete $3.param.type;
        } else {
            // Add the parameter
            $$ = $1;
            $1->addParameter($3.param.turnToConst());
        }
    }
    ;

function_header
    : fully_specified_type IDENTIFIER LEFT_PAREN {
        $$ = context->parseFunctionHeader($1, $2.string, @2);

        context->symbolTable.push();
        context->enterFunctionDeclaration();
    }
    ;

parameter_declarator
    // Type + name
    : type_specifier identifier {
        if ($1.getBasicType() == EbtVoid) {
            context->error(@2, "illegal use of type 'void'", $2.string->c_str());
        }
        context->checkIsNotReserved(@2, *$2.string);
        TParameter param = {$2.string, new TType($1)};
        $$.param = param;
    }
    | type_specifier identifier LEFT_BRACKET constant_expression RIGHT_BRACKET {
        // Check that we can make an array out of this type
        context->checkIsValidTypeForArray(@3, $1);

        context->checkIsNotReserved(@2, *$2.string);

        unsigned int size = context->checkIsValidArraySize(@3, $4);

        $1.setArraySize(size);

        TType* type = new TType($1);
        TParameter param = { $2.string, type };
        $$.param = param;
    }
    ;

parameter_declaration
    //
    // The only parameter qualifier a parameter can have are
    // IN_QUAL, OUT_QUAL, INOUT_QUAL, or CONST.
    //

    //
    // Type + name
    //
    : type_qualifier parameter_declarator {
        $$ = $2;
        context->checkIsParameterQualifierValid(@2, *$1, $2.param.type);
    }
    | parameter_declarator {
        $$ = $1;
        $$.param.type->setQualifier(EvqIn);
    }
    | type_qualifier parameter_type_specifier {
        $$ = $2;
        context->checkIsParameterQualifierValid(@2, *$1, $2.param.type);
    }
    | parameter_type_specifier {
        $$ = $1;
        $$.param.type->setQualifier(EvqIn);
    }
    ;

parameter_type_specifier
    : type_specifier {
        TParameter param = { 0, new TType($1) };
        $$.param = param;
    }
    ;

init_declarator_list
    : single_declaration {
        $$ = $1;
    }
    | init_declarator_list COMMA identifier {
        $$ = $1;
        context->parseDeclarator($$.type, @3, *$3.string, $$.intermDeclaration);
    }
    | init_declarator_list COMMA identifier LEFT_BRACKET constant_expression RIGHT_BRACKET {
        $$ = $1;
        context->parseArrayDeclarator($$.type, @3, *$3.string, @4, $5, $$.intermDeclaration);
    }
    | init_declarator_list COMMA identifier LEFT_BRACKET RIGHT_BRACKET EQUAL initializer {
        ES3_OR_NEWER("[]", @3, "implicitly sized array");
        $$ = $1;
        context->parseArrayInitDeclarator($$.type, @3, *$3.string, @4, nullptr, @6, $7, $$.intermDeclaration);
    }
    | init_declarator_list COMMA identifier LEFT_BRACKET constant_expression RIGHT_BRACKET EQUAL initializer {
        ES3_OR_NEWER("=", @7, "first-class arrays (array initializer)");
        $$ = $1;
        context->parseArrayInitDeclarator($$.type, @3, *$3.string, @4, $5, @7, $8, $$.intermDeclaration);
    }
    | init_declarator_list COMMA identifier EQUAL initializer {
        $$ = $1;
        context->parseInitDeclarator($$.type, @3, *$3.string, @4, $5, $$.intermDeclaration);
    }
    ;

single_declaration
    : fully_specified_type {
        $$.type = $1;
        $$.intermDeclaration = context->parseSingleDeclaration($$.type, @1, "");
    }
    | fully_specified_type identifier {
        $$.type = $1;
        $$.intermDeclaration = context->parseSingleDeclaration($$.type, @2, *$2.string);
    }
    | fully_specified_type identifier LEFT_BRACKET constant_expression RIGHT_BRACKET {
        $$.type = $1;
        $$.intermDeclaration = context->parseSingleArrayDeclaration($$.type, @2, *$2.string, @3, $4);
    }
    | fully_specified_type identifier LEFT_BRACKET RIGHT_BRACKET EQUAL initializer {
        ES3_OR_NEWER("[]", @3, "implicitly sized array");
        $$.type = $1;
        $$.intermDeclaration = context->parseSingleArrayInitDeclaration($$.type, @2, *$2.string, @3, nullptr, @5, $6);
    }
    | fully_specified_type identifier LEFT_BRACKET constant_expression RIGHT_BRACKET EQUAL initializer {
        ES3_OR_NEWER("=", @6, "first-class arrays (array initializer)");
        $$.type = $1;
        $$.intermDeclaration = context->parseSingleArrayInitDeclaration($$.type, @2, *$2.string, @3, $4, @6, $7);
    }
    | fully_specified_type identifier EQUAL initializer {
        $$.type = $1;
        $$.intermDeclaration = context->parseSingleInitDeclaration($$.type, @2, *$2.string, @3, $4);
    }
    ;

fully_specified_type
    : type_specifier {
        context->addFullySpecifiedType(&$1);
        $$ = $1;
    }
    | type_qualifier type_specifier {
        $$ = context->addFullySpecifiedType(*$1, $2);
    }
    ;

interpolation_qualifier
    : SMOOTH {
        $$ = EvqSmooth;
    }
    | FLAT {
        $$ = EvqFlat;
    }
    ;

type_qualifier
    : single_type_qualifier {
        $$ = context->createTypeQualifierBuilder(@1);
        $$->appendQualifier($1);
    }
    | type_qualifier single_type_qualifier {
        $$ = $1;
        $$->appendQualifier($2);
    }
    ;

invariant_qualifier
    : INVARIANT {
        // empty
    }
    ;

single_type_qualifier
    : storage_qualifier {
        context->checkLocalVariableConstStorageQualifier(*$1);
        $$ = $1;
    }
    | layout_qualifier {
        context->checkIsAtGlobalLevel(@1, "layout");
        $$ = new TLayoutQualifierWrapper($1, @1);
    }
    | precision_qualifier {
        $$ = new TPrecisionQualifierWrapper($1, @1);
    }
    | interpolation_qualifier {
        $$ = new TInterpolationQualifierWrapper($1, @1);
    }
    | invariant_qualifier {
        context->checkIsAtGlobalLevel(@1, "invariant");
        $$ = new TInvariantQualifierWrapper(@1);
    }
    ;


storage_qualifier
    :
    ATTRIBUTE {
        VERTEX_ONLY("attribute", @1);
        ES2_ONLY("attribute", @1);
        context->checkIsAtGlobalLevel(@1, "attribute");
        $$ = new TStorageQualifierWrapper(EvqAttribute, @1);
    }
    | VARYING {
        ES2_ONLY("varying", @1);
        context->checkIsAtGlobalLevel(@1, "varying");
        if (context->getShaderType() == GL_VERTEX_SHADER)
            $$ = new TStorageQualifierWrapper(EvqVaryingOut, @1);
        else
            $$ = new TStorageQualifierWrapper(EvqVaryingIn, @1);
    }
    | CONST_QUAL {
        $$ = new TStorageQualifierWrapper(EvqConst, @1);
    }
    | IN_QUAL {
        if (context->declaringFunction())
        {
            $$ = new TStorageQualifierWrapper(EvqIn, @1);
        }
        else if (context->getShaderType() == GL_FRAGMENT_SHADER)
        {
            ES3_OR_NEWER("in", @1, "storage qualifier");
            $$ = new TStorageQualifierWrapper(EvqFragmentIn, @1);
        }
        else if (context->getShaderType() == GL_VERTEX_SHADER)
        {
            ES3_OR_NEWER("in", @1, "storage qualifier");
            $$ = new TStorageQualifierWrapper(EvqVertexIn, @1);
        }
        else
        {
            $$ = new TStorageQualifierWrapper(EvqComputeIn, @1);
        }
    }
    | OUT_QUAL {
        if (context->declaringFunction())
        {
            $$ = new TStorageQualifierWrapper(EvqOut, @1);
        }
        else
        {
            ES3_OR_NEWER("out", @1, "storage qualifier");
            NON_COMPUTE_ONLY("out", @1);
            if (context->getShaderType() == GL_FRAGMENT_SHADER)
            {
                $$ = new TStorageQualifierWrapper(EvqFragmentOut, @1);
            }
            else
            {
                $$ = new TStorageQualifierWrapper(EvqVertexOut, @1);
            }
        }
    }
    | INOUT_QUAL {
        if (!context->declaringFunction())
        {
            context->error(@1, "invalid inout qualifier", "'inout' can be only used with function parameters");
        }
        $$ = new TStorageQualifierWrapper(EvqInOut, @1);
    }
    | CENTROID {
        ES3_OR_NEWER("centroid", @1, "storage qualifier");
        $$ = new TStorageQualifierWrapper(EvqCentroid, @1);
    }
    | UNIFORM {
        context->checkIsAtGlobalLevel(@1, "uniform");
        $$ = new TStorageQualifierWrapper(EvqUniform, @1);
    }
    | READONLY {
        $$ = new TMemoryQualifierWrapper(EvqReadOnly, @1);
    }
    | WRITEONLY {
        $$ = new TMemoryQualifierWrapper(EvqWriteOnly, @1);
    }
    | COHERENT {
        $$ = new TMemoryQualifierWrapper(EvqCoherent, @1);
    }
    | RESTRICT {
        $$ = new TMemoryQualifierWrapper(EvqRestrict, @1);
    }
    | VOLATILE {
        $$ = new TMemoryQualifierWrapper(EvqVolatile, @1);
    }
    ;

type_specifier
    : type_specifier_no_prec {
        $$ = $1;
        $$.precision = context->symbolTable.getDefaultPrecision($1.getBasicType());
    }
    ;

precision_qualifier
    : HIGH_PRECISION {
        $$ = EbpHigh;
    }
    | MEDIUM_PRECISION {
        $$ = EbpMedium;
    }
    | LOW_PRECISION  {
        $$ = EbpLow;
    }
    ;

layout_qualifier
    : LAYOUT LEFT_PAREN layout_qualifier_id_list RIGHT_PAREN {
        ES3_OR_NEWER("layout", @1, "qualifier");
        $$ = $3;
    }
    ;

layout_qualifier_id_list
    : layout_qualifier_id {
        $$ = $1;
    }
    | layout_qualifier_id_list COMMA layout_qualifier_id {
        $$ = context->joinLayoutQualifiers($1, $3, @3);
    }
    ;

layout_qualifier_id
    : IDENTIFIER {
        $$ = context->parseLayoutQualifier(*$1.string, @1);
    }
    | IDENTIFIER EQUAL INTCONSTANT {
        $$ = context->parseLayoutQualifier(*$1.string, @1, $3.i, @3);
    }
    | IDENTIFIER EQUAL UINTCONSTANT {
        $$ = context->parseLayoutQualifier(*$1.string, @1, $3.i, @3);
    }
    ;

type_specifier_no_prec
    : type_specifier_nonarray {
        $$.initialize($1, (context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary));
    }
    | type_specifier_nonarray LEFT_BRACKET RIGHT_BRACKET {
        ES3_OR_NEWER("[]", @2, "implicitly sized array");
        $$.initialize($1, (context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary));
        $$.setArraySize(0);
    }
    | type_specifier_nonarray LEFT_BRACKET constant_expression RIGHT_BRACKET {
        $$.initialize($1, (context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary));
        if (context->checkIsValidTypeForArray(@2, $$))
        {
            unsigned int size = context->checkIsValidArraySize(@2, $3);
            $$.setArraySize(size);
        }
    }
    ;

type_specifier_nonarray
    : VOID_TYPE {
        $$.initialize(EbtVoid, @1);
    }
    | FLOAT_TYPE {
        $$.initialize(EbtFloat, @1);
    }
    | INT_TYPE {
        $$.initialize(EbtInt, @1);
    }
    | UINT_TYPE {
        $$.initialize(EbtUInt, @1);
    }
    | BOOL_TYPE {
        $$.initialize(EbtBool, @1);
    }
    | VEC2 {
        $$.initialize(EbtFloat, @1);
        $$.setAggregate(2);
    }
    | VEC3 {
        $$.initialize(EbtFloat, @1);
        $$.setAggregate(3);
    }
    | VEC4 {
        $$.initialize(EbtFloat, @1);
        $$.setAggregate(4);
    }
    | BVEC2 {
        $$.initialize(EbtBool, @1);
        $$.setAggregate(2);
    }
    | BVEC3 {
        $$.initialize(EbtBool, @1);
        $$.setAggregate(3);
    }
    | BVEC4 {
        $$.initialize(EbtBool, @1);
        $$.setAggregate(4);
    }
    | IVEC2 {
        $$.initialize(EbtInt, @1);
        $$.setAggregate(2);
    }
    | IVEC3 {
        $$.initialize(EbtInt, @1);
        $$.setAggregate(3);
    }
    | IVEC4 {
        $$.initialize(EbtInt, @1);
        $$.setAggregate(4);
    }
    | UVEC2 {
        $$.initialize(EbtUInt, @1);
        $$.setAggregate(2);
    }
    | UVEC3 {
        $$.initialize(EbtUInt, @1);
        $$.setAggregate(3);
    }
    | UVEC4 {
        $$.initialize(EbtUInt, @1);
        $$.setAggregate(4);
    }
    | MATRIX2 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(2, 2);
    }
    | MATRIX3 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(3, 3);
    }
    | MATRIX4 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(4, 4);
    }
    | MATRIX2x3 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(2, 3);
    }
    | MATRIX3x2 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(3, 2);
    }
    | MATRIX2x4 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(2, 4);
    }
    | MATRIX4x2 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(4, 2);
    }
    | MATRIX3x4 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(3, 4);
    }
    | MATRIX4x3 {
        $$.initialize(EbtFloat, @1);
        $$.setMatrix(4, 3);
    }
    | SAMPLER2D {
        $$.initialize(EbtSampler2D, @1);
    }
    | SAMPLER3D {
        $$.initialize(EbtSampler3D, @1);
    }
    | SAMPLERCUBE {
        $$.initialize(EbtSamplerCube, @1);
    }
    | SAMPLER2DARRAY {
        $$.initialize(EbtSampler2DArray, @1);
    }
    | ISAMPLER2D {
        $$.initialize(EbtISampler2D, @1);
    }
    | ISAMPLER3D {
        $$.initialize(EbtISampler3D, @1);
    }
    | ISAMPLERCUBE {
        $$.initialize(EbtISamplerCube, @1);
    }
    | ISAMPLER2DARRAY {
        $$.initialize(EbtISampler2DArray, @1);
    }
    | USAMPLER2D {
        $$.initialize(EbtUSampler2D, @1);
    }
    | USAMPLER3D {
        $$.initialize(EbtUSampler3D, @1);
    }
    | USAMPLERCUBE {
        $$.initialize(EbtUSamplerCube, @1);
    }
    | USAMPLER2DARRAY {
        $$.initialize(EbtUSampler2DArray, @1);
    }
    | SAMPLER2DSHADOW {
        $$.initialize(EbtSampler2DShadow, @1);
    }
    | SAMPLERCUBESHADOW {
        $$.initialize(EbtSamplerCubeShadow, @1);
    }
    | SAMPLER2DARRAYSHADOW {
        $$.initialize(EbtSampler2DArrayShadow, @1);
    }
    | SAMPLER_EXTERNAL_OES {
        if (!context->supportsExtension("GL_OES_EGL_image_external") &&
            !context->supportsExtension("GL_NV_EGL_stream_consumer_external")) {
            context->error(@1, "unsupported type", "samplerExternalOES");
        }
        $$.initialize(EbtSamplerExternalOES, @1);
    }
    | SAMPLER2DRECT {
        if (!context->supportsExtension("GL_ARB_texture_rectangle")) {
            context->error(@1, "unsupported type", "sampler2DRect");
        }
        $$.initialize(EbtSampler2DRect, @1);
    }
    | struct_specifier {
        $$ = $1;
    }
    | IMAGE2D {
        $$.initialize(EbtImage2D, @1);
    }
    | IIMAGE2D {
        $$.initialize(EbtIImage2D, @1);
    }
    | UIMAGE2D {
        $$.initialize(EbtUImage2D, @1);
    }
    | IMAGE3D {
        $$.initialize(EbtImage3D, @1);
    }
    | IIMAGE3D {
        $$.initialize(EbtIImage3D, @1);
    }
    | UIMAGE3D {
        $$.initialize(EbtUImage3D, @1);
    }
    | IMAGE2DARRAY {
        $$.initialize(EbtImage2DArray, @1);
    }
    | IIMAGE2DARRAY {
        $$.initialize(EbtIImage2DArray, @1);
    }
    | UIMAGE2DARRAY {
        $$.initialize(EbtUImage2DArray, @1);
    }
    | IMAGECUBE {
        $$.initialize(EbtImageCube, @1);
    }
    | IIMAGECUBE {
        $$.initialize(EbtIImageCube, @1);
    }
    | UIMAGECUBE {
        $$.initialize(EbtUImageCube, @1);
    }
    | TYPE_NAME {
        //
        // This is for user defined type names.  The lexical phase looked up the
        // type.
        //
        TType& structure = static_cast<TVariable*>($1.symbol)->getType();
        $$.initialize(EbtStruct, @1);
        $$.userDef = &structure;
    }
    ;

struct_specifier
    : STRUCT identifier LEFT_BRACE { context->enterStructDeclaration(@2, *$2.string); } struct_declaration_list RIGHT_BRACE {
        $$ = context->addStructure(@1, @2, $2.string, $5);
    }
    | STRUCT LEFT_BRACE { context->enterStructDeclaration(@2, *$2.string); } struct_declaration_list RIGHT_BRACE {
        $$ = context->addStructure(@1, @$, NewPoolTString(""), $4);
    }
    ;

struct_declaration_list
    : struct_declaration {
        $$ = $1;
    }
    | struct_declaration_list struct_declaration {
        $$ = $1;
        for (size_t i = 0; i < $2->size(); ++i) {
            TField* field = (*$2)[i];
            for (size_t j = 0; j < $$->size(); ++j) {
                if ((*$$)[j]->name() == field->name()) {
                    context->error(@2, "duplicate field name in structure:", "struct", field->name().c_str());
                }
            }
            $$->push_back(field);
        }
    }
    ;

struct_declaration
    : type_specifier struct_declarator_list SEMICOLON {
        $$ = context->addStructDeclaratorList($1, $2);
    }
    | type_qualifier type_specifier struct_declarator_list SEMICOLON {
        // ES3 Only, but errors should be handled elsewhere
        $$ = context->addStructDeclaratorListWithQualifiers(*$1, &$2, $3);
    }
    ;

struct_declarator_list
    : struct_declarator {
        $$ = NewPoolTFieldList();
        $$->push_back($1);
    }
    | struct_declarator_list COMMA struct_declarator {
        $$->push_back($3);
    }
    ;

struct_declarator
    : identifier {
        context->checkIsNotReserved(@1, *$1.string);

        TType* type = new TType(EbtVoid, EbpUndefined);
        $$ = new TField(type, $1.string, @1);
    }
    | identifier LEFT_BRACKET constant_expression RIGHT_BRACKET {
        context->checkIsNotReserved(@1, *$1.string);

        TType* type = new TType(EbtVoid, EbpUndefined);
        unsigned int size = context->checkIsValidArraySize(@3, $3);
        type->setArraySize(size);

        $$ = new TField(type, $1.string, @1);
    }
    ;

initializer
    : assignment_expression { $$ = $1; }
    ;

declaration_statement
    : declaration { $$ = $1; }
    ;

statement
    : compound_statement  { $$ = $1; }
    | simple_statement    { $$ = $1; }
    ;

// Grammar Note:  Labeled statements for SWITCH only; 'goto' is not supported.

simple_statement
    : declaration_statement { $$ = $1; }
    | expression_statement  { $$ = $1; }
    | selection_statement   { $$ = $1; }
    | switch_statement      { $$ = $1; }
    | case_label            { $$ = $1; }
    | iteration_statement   { $$ = $1; }
    | jump_statement        { $$ = $1; }
    ;

compound_statement
    : LEFT_BRACE RIGHT_BRACE { $$ = 0; }
    | LEFT_BRACE { context->symbolTable.push(); } statement_list { context->symbolTable.pop(); } RIGHT_BRACE {
        if ($3 != 0) {
            $3->setLine(@$);
        }
        $$ = $3;
    }
    ;

statement_no_new_scope
    : compound_statement_no_new_scope { $$ = $1; }
    | simple_statement                { $$ = $1; }
    ;

statement_with_scope
    : { context->symbolTable.push(); } compound_statement_no_new_scope { context->symbolTable.pop(); $$ = $2; }
    | { context->symbolTable.push(); } simple_statement                { context->symbolTable.pop(); $$ = $2; }
    ;

compound_statement_no_new_scope
    // Statement that doesn't create a new scope, for selection_statement, iteration_statement
    : LEFT_BRACE RIGHT_BRACE {
        $$ = 0;
    }
    | LEFT_BRACE statement_list RIGHT_BRACE {
        if ($2) {
            $2->setLine(@$);
        }
        $$ = $2;
    }
    ;

statement_list
    : statement {
        $$ = new TIntermBlock();
        $$->setLine(@$);
        $$->appendStatement($1);
    }
    | statement_list statement {
        $$ = $1;
        $$->appendStatement($2);
    }
    ;

expression_statement
    : SEMICOLON  { $$ = 0; }
    | expression SEMICOLON  { $$ = static_cast<TIntermNode*>($1); }
    ;

selection_statement
    : IF LEFT_PAREN expression RIGHT_PAREN selection_rest_statement {
        context->checkIsScalarBool(@1, $3);
        $$ = context->intermediate.addIfElse($3, $5, @1);
    }
    ;

selection_rest_statement
    : statement_with_scope ELSE statement_with_scope {
        $$.node1 = $1;
        $$.node2 = $3;
    }
    | statement_with_scope {
        $$.node1 = $1;
        $$.node2 = 0;
    }
    ;

switch_statement
    : SWITCH LEFT_PAREN expression RIGHT_PAREN { context->incrSwitchNestingLevel(); } compound_statement {
        $$ = context->addSwitch($3, $6, @1);
        context->decrSwitchNestingLevel();
    }
    ;

case_label
    : CASE constant_expression COLON {
        $$ = context->addCase($2, @1);
    }
    | DEFAULT COLON {
        $$ = context->addDefault(@1);
    }
    ;

condition
    // In 1996 c++ draft, conditions can include single declarations
    : expression {
        $$ = $1;
        context->checkIsScalarBool($1->getLine(), $1);
    }
    | fully_specified_type identifier EQUAL initializer {
        TIntermBinary *initNode = nullptr;
        context->checkIsScalarBool(@2, $1);

        if (!context->executeInitializer(@2, *$2.string, $1, $4, &initNode))
            $$ = $4;
        else {
            $$ = 0;
        }
    }
    ;

iteration_statement
    : WHILE LEFT_PAREN { context->symbolTable.push(); context->incrLoopNestingLevel(); } condition RIGHT_PAREN statement_no_new_scope {
        context->symbolTable.pop();
        $$ = context->intermediate.addLoop(ELoopWhile, 0, $4, 0, $6, @1);
        context->decrLoopNestingLevel();
    }
    | DO { context->incrLoopNestingLevel(); } statement_with_scope WHILE LEFT_PAREN expression RIGHT_PAREN SEMICOLON {
        context->checkIsScalarBool(@8, $6);

        $$ = context->intermediate.addLoop(ELoopDoWhile, 0, $6, 0, $3, @4);
        context->decrLoopNestingLevel();
    }
    | FOR LEFT_PAREN { context->symbolTable.push(); context->incrLoopNestingLevel(); } for_init_statement for_rest_statement RIGHT_PAREN statement_no_new_scope {
        context->symbolTable.pop();
        $$ = context->intermediate.addLoop(ELoopFor, $4, reinterpret_cast<TIntermTyped*>($5.node1), reinterpret_cast<TIntermTyped*>($5.node2), $7, @1);
        context->decrLoopNestingLevel();
    }
    ;

for_init_statement
    : expression_statement {
        $$ = $1;
    }
    | declaration_statement {
        $$ = $1;
    }
    ;

conditionopt
    : condition {
        $$ = $1;
    }
    | /* May be null */ {
        $$ = 0;
    }
    ;

for_rest_statement
    : conditionopt SEMICOLON {
        $$.node1 = $1;
        $$.node2 = 0;
    }
    | conditionopt SEMICOLON expression  {
        $$.node1 = $1;
        $$.node2 = $3;
    }
    ;

jump_statement
    : CONTINUE SEMICOLON {
        $$ = context->addBranch(EOpContinue, @1);
    }
    | BREAK SEMICOLON {
        $$ = context->addBranch(EOpBreak, @1);
    }
    | RETURN SEMICOLON {
        $$ = context->addBranch(EOpReturn, @1);
    }
    | RETURN expression SEMICOLON {
        $$ = context->addBranch(EOpReturn, $2, @1);
    }
    | DISCARD SEMICOLON {
        FRAG_ONLY("discard", @1);
        $$ = context->addBranch(EOpKill, @1);
    }
    ;

// Grammar Note:  No 'goto'.  Gotos are not supported.

translation_unit
    : external_declaration {
        $$ = new TIntermBlock();
        $$->setLine(@$);
        $$->appendStatement($1);
        context->setTreeRoot($$);
    }
    | translation_unit external_declaration {
        $$->appendStatement($2);
    }
    ;

external_declaration
    : function_definition {
        $$ = $1;
    }
    | declaration {
        $$ = $1;
    }
    ;

function_definition
    : function_prototype {
        context->parseFunctionDefinitionHeader(@1, &($1.function), &$1.intermAggregate);
    }
    compound_statement_no_new_scope {
        $$ = context->addFunctionDefinition(*($1.function), $1.intermAggregate, $3, @1);
    }
    ;

%%

int glslang_parse(TParseContext* context) {
    return yyparse(context, context->getScanner());
}