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
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
//
// Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
// Copyright (C) 2012-2016 LunarG, Inc.
// Copyright (C) 2015-2016 Google, Inc.
// Copyright (C) 2017 ARM Limited.
// Modifications Copyright (C) 2020 Advanced Micro Devices, Inc. All rights reserved.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
//    Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
//    Redistributions in binary form must reproduce the above
//    copyright notice, this list of conditions and the following
//    disclaimer in the documentation and/or other materials provided
//    with the distribution.
//
//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
//    contributors may be used to endorse or promote products derived
//    from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//

#ifndef _TYPES_INCLUDED
#define _TYPES_INCLUDED

#include "../Include/Common.h"
#include "../Include/BaseTypes.h"
#include "../Public/ShaderLang.h"
#include "arrays.h"

#include <algorithm>

namespace glslang {

const int GlslangMaxTypeLength = 200;  // TODO: need to print block/struct one member per line, so this can stay bounded

const char* const AnonymousPrefix = "anon@"; // for something like a block whose members can be directly accessed
inline bool IsAnonymous(const TString& name)
{
    return name.compare(0, 5, AnonymousPrefix) == 0;
}

//
// Details within a sampler type
//
enum TSamplerDim {
    EsdNone,
    Esd1D,
    Esd2D,
    Esd3D,
    EsdCube,
    EsdRect,
    EsdBuffer,
    EsdSubpass,  // goes only with non-sampled image (image is true)
    EsdNumDims
};

struct TSampler {   // misnomer now; includes images, textures without sampler, and textures with sampler
    TBasicType type : 8;  // type returned by sampler
    TSamplerDim dim : 8;
    bool    arrayed : 1;
    bool     shadow : 1;
    bool         ms : 1;
    bool      image : 1;  // image, combined should be false
    bool   combined : 1;  // true means texture is combined with a sampler, false means texture with no sampler
    bool    sampler : 1;  // true means a pure sampler, other fields should be clear()

#ifdef GLSLANG_WEB
    bool is1D()          const { return false; }
    bool isBuffer()      const { return false; }
    bool isRect()        const { return false; }
    bool isSubpass()     const { return false; }
    bool isCombined()    const { return true; }
    bool isImage()       const { return false; }
    bool isImageClass()  const { return false; }
    bool isMultiSample() const { return false; }
    bool isExternal()    const { return false; }
    void setExternal(bool e) { }
    bool isYuv()         const { return false; }
#else
    unsigned int vectorSize : 3;  // vector return type size.
    // Some languages support structures as sample results.  Storing the whole structure in the
    // TSampler is too large, so there is an index to a separate table.
    static const unsigned structReturnIndexBits = 4;                        // number of index bits to use.
    static const unsigned structReturnSlots = (1<<structReturnIndexBits)-1; // number of valid values
    static const unsigned noReturnStruct = structReturnSlots;               // value if no return struct type.
    // Index into a language specific table of texture return structures.
    unsigned int structReturnIndex : structReturnIndexBits;

    bool   external : 1;  // GL_OES_EGL_image_external
    bool        yuv : 1;  // GL_EXT_YUV_target

#ifdef ENABLE_HLSL
    unsigned int getVectorSize() const { return vectorSize; }
    void clearReturnStruct() { structReturnIndex = noReturnStruct; }
    bool hasReturnStruct() const { return structReturnIndex != noReturnStruct; }
    unsigned getStructReturnIndex() const { return structReturnIndex; }
#endif

    bool is1D()          const { return dim == Esd1D; }
    bool isBuffer()      const { return dim == EsdBuffer; }
    bool isRect()        const { return dim == EsdRect; }
    bool isSubpass()     const { return dim == EsdSubpass; }
    bool isCombined()    const { return combined; }
    bool isImage()       const { return image && !isSubpass(); }
    bool isImageClass()  const { return image; }
    bool isMultiSample() const { return ms; }
    bool isExternal()    const { return external; }
    void setExternal(bool e) { external = e; }
    bool isYuv()         const { return yuv; }
#endif
    bool isTexture()     const { return !sampler && !image; }
    bool isPureSampler() const { return sampler; }

    void setCombined(bool c) { combined = c; }
    void setBasicType(TBasicType t) { type = t; }
    TBasicType getBasicType()  const { return type; }
    bool isShadow()      const { return shadow; }
    bool isArrayed()     const { return arrayed; }

    void clear()
    {
        type = EbtVoid;
        dim = EsdNone;
        arrayed = false;
        shadow = false;
        ms = false;
        image = false;
        combined = false;
        sampler = false;
#ifndef GLSLANG_WEB
        external = false;
        yuv = false;
#endif

#ifdef ENABLE_HLSL
        clearReturnStruct();
        // by default, returns a single vec4;
        vectorSize = 4;
#endif
    }

    // make a combined sampler and texture
    void set(TBasicType t, TSamplerDim d, bool a = false, bool s = false, bool m = false)
    {
        clear();
        type = t;
        dim = d;
        arrayed = a;
        shadow = s;
        ms = m;
        combined = true;
    }

    // make an image
    void setImage(TBasicType t, TSamplerDim d, bool a = false, bool s = false, bool m = false)
    {
        clear();
        type = t;
        dim = d;
        arrayed = a;
        shadow = s;
        ms = m;
        image = true;
    }

    // make a texture with no sampler
    void setTexture(TBasicType t, TSamplerDim d, bool a = false, bool s = false, bool m = false)
    {
        clear();
        type = t;
        dim = d;
        arrayed = a;
        shadow = s;
        ms = m;
    }

    // make a pure sampler, no texture, no image, nothing combined, the 'sampler' keyword
    void setPureSampler(bool s)
    {
        clear();
        sampler = true;
        shadow = s;
    }

#ifndef GLSLANG_WEB
    // make a subpass input attachment
    void setSubpass(TBasicType t, bool m = false)
    {
        clear();
        type = t;
        image = true;
        dim = EsdSubpass;
        ms = m;
    }
#endif

    bool operator==(const TSampler& right) const
    {
        return      type == right.type &&
                     dim == right.dim &&
                 arrayed == right.arrayed &&
                  shadow == right.shadow &&
         isMultiSample() == right.isMultiSample() &&
          isImageClass() == right.isImageClass() &&
            isCombined() == right.isCombined() &&
         isPureSampler() == right.isPureSampler() &&
            isExternal() == right.isExternal() &&
                 isYuv() == right.isYuv()
#ifdef ENABLE_HLSL
      && getVectorSize() == right.getVectorSize() &&
  getStructReturnIndex() == right.getStructReturnIndex()
#endif
        ;
    }

    bool operator!=(const TSampler& right) const
    {
        return ! operator==(right);
    }

    TString getString() const
    {
        TString s;

        if (isPureSampler()) {
            s.append("sampler");
            return s;
        }

        switch (type) {
        case EbtInt:    s.append("i");   break;
        case EbtUint:   s.append("u");   break;
#ifndef GLSLANG_WEB
        case EbtFloat16: s.append("f16"); break;
        case EbtInt8:   s.append("i8");  break;
        case EbtUint16: s.append("u8");  break;
        case EbtInt16:  s.append("i16"); break;
        case EbtUint8:  s.append("u16"); break;
        case EbtInt64:  s.append("i64"); break;
        case EbtUint64: s.append("u64"); break;
#endif
        default:  break;
        }
        if (isImageClass()) {
            if (isSubpass())
                s.append("subpass");
            else
                s.append("image");
        } else if (isCombined()) {
            s.append("sampler");
        } else {
            s.append("texture");
        }
        if (isExternal()) {
            s.append("ExternalOES");
            return s;
        }
        if (isYuv()) {
            return "__" + s + "External2DY2YEXT";
        }
        switch (dim) {
        case Esd2D:      s.append("2D");      break;
        case Esd3D:      s.append("3D");      break;
        case EsdCube:    s.append("Cube");    break;
#ifndef GLSLANG_WEB
        case Esd1D:      s.append("1D");      break;
        case EsdRect:    s.append("2DRect");  break;
        case EsdBuffer:  s.append("Buffer");  break;
        case EsdSubpass: s.append("Input"); break;
#endif
        default:  break;  // some compilers want this
        }
        if (isMultiSample())
            s.append("MS");
        if (arrayed)
            s.append("Array");
        if (shadow)
            s.append("Shadow");

        return s;
    }
};

//
// Need to have association of line numbers to types in a list for building structs.
//
class TType;
struct TTypeLoc {
    TType* type;
    TSourceLoc loc;
};
typedef TVector<TTypeLoc> TTypeList;

typedef TVector<TString*> TIdentifierList;

//
// Following are a series of helper enums for managing layouts and qualifiers,
// used for TPublicType, TType, others.
//

enum TLayoutPacking {
    ElpNone,
    ElpShared,      // default, but different than saying nothing
    ElpStd140,
    ElpStd430,
    ElpPacked,
    ElpScalar,
    ElpCount        // If expanding, see bitfield width below
};

enum TLayoutMatrix {
    ElmNone,
    ElmRowMajor,
    ElmColumnMajor, // default, but different than saying nothing
    ElmCount        // If expanding, see bitfield width below
};

// Union of geometry shader and tessellation shader geometry types.
// They don't go into TType, but rather have current state per shader or
// active parser type (TPublicType).
enum TLayoutGeometry {
    ElgNone,
    ElgPoints,
    ElgLines,
    ElgLinesAdjacency,
    ElgLineStrip,
    ElgTriangles,
    ElgTrianglesAdjacency,
    ElgTriangleStrip,
    ElgQuads,
    ElgIsolines,
};

enum TVertexSpacing {
    EvsNone,
    EvsEqual,
    EvsFractionalEven,
    EvsFractionalOdd
};

enum TVertexOrder {
    EvoNone,
    EvoCw,
    EvoCcw
};

// Note: order matters, as type of format is done by comparison.
enum TLayoutFormat {
    ElfNone,

    // Float image
    ElfRgba32f,
    ElfRgba16f,
    ElfR32f,
    ElfRgba8,
    ElfRgba8Snorm,

    ElfEsFloatGuard,    // to help with comparisons

    ElfRg32f,
    ElfRg16f,
    ElfR11fG11fB10f,
    ElfR16f,
    ElfRgba16,
    ElfRgb10A2,
    ElfRg16,
    ElfRg8,
    ElfR16,
    ElfR8,
    ElfRgba16Snorm,
    ElfRg16Snorm,
    ElfRg8Snorm,
    ElfR16Snorm,
    ElfR8Snorm,

    ElfFloatGuard,      // to help with comparisons

    // Int image
    ElfRgba32i,
    ElfRgba16i,
    ElfRgba8i,
    ElfR32i,

    ElfEsIntGuard,     // to help with comparisons

    ElfRg32i,
    ElfRg16i,
    ElfRg8i,
    ElfR16i,
    ElfR8i,

    ElfIntGuard,       // to help with comparisons

    // Uint image
    ElfRgba32ui,
    ElfRgba16ui,
    ElfRgba8ui,
    ElfR32ui,

    ElfEsUintGuard,    // to help with comparisons

    ElfRg32ui,
    ElfRg16ui,
    ElfRgb10a2ui,
    ElfRg8ui,
    ElfR16ui,
    ElfR8ui,

    ElfCount
};

enum TLayoutDepth {
    EldNone,
    EldAny,
    EldGreater,
    EldLess,
    EldUnchanged,

    EldCount
};

enum TBlendEquationShift {
    // No 'EBlendNone':
    // These are used as bit-shift amounts.  A mask of such shifts will have type 'int',
    // and in that space, 0 means no bits set, or none.  In this enum, 0 means (1 << 0), a bit is set.
    EBlendMultiply,
    EBlendScreen,
    EBlendOverlay,
    EBlendDarken,
    EBlendLighten,
    EBlendColordodge,
    EBlendColorburn,
    EBlendHardlight,
    EBlendSoftlight,
    EBlendDifference,
    EBlendExclusion,
    EBlendHslHue,
    EBlendHslSaturation,
    EBlendHslColor,
    EBlendHslLuminosity,
    EBlendAllEquations,

    EBlendCount
};

enum TInterlockOrdering {
    EioNone,
    EioPixelInterlockOrdered,
    EioPixelInterlockUnordered,
    EioSampleInterlockOrdered,
    EioSampleInterlockUnordered,
    EioShadingRateInterlockOrdered,
    EioShadingRateInterlockUnordered,

    EioCount,
};

enum TShaderInterface
{
    // Includes both uniform blocks and buffer blocks
    EsiUniform = 0,
    EsiInput,
    EsiOutput,
    EsiNone,

    EsiCount
};


class TQualifier {
public:
    static const int layoutNotSet = -1;

    void clear()
    {
        precision = EpqNone;
        invariant = false;
        makeTemporary();
        declaredBuiltIn = EbvNone;
#ifndef GLSLANG_WEB
        noContraction = false;
#endif
    }

    // drop qualifiers that don't belong in a temporary variable
    void makeTemporary()
    {
        semanticName = nullptr;
        storage = EvqTemporary;
        builtIn = EbvNone;
        clearInterstage();
        clearMemory();
        specConstant = false;
        nonUniform = false;
        clearLayout();
    }

    void clearInterstage()
    {
        clearInterpolation();
#ifndef GLSLANG_WEB
        patch = false;
        sample = false;
#endif
    }

    void clearInterpolation()
    {
        centroid     = false;
        smooth       = false;
        flat         = false;
#ifndef GLSLANG_WEB
        nopersp      = false;
        explicitInterp = false;
        pervertexNV = false;
        perPrimitiveNV = false;
        perViewNV = false;
        perTaskNV = false;
#endif
    }

    void clearMemory()
    {
#ifndef GLSLANG_WEB
        coherent     = false;
        devicecoherent = false;
        queuefamilycoherent = false;
        workgroupcoherent = false;
        subgroupcoherent  = false;
        shadercallcoherent = false;
        nonprivate = false;
        volatil      = false;
        restrict     = false;
        readonly     = false;
        writeonly    = false;
#endif
    }

    const char*         semanticName;
    TStorageQualifier   storage   : 6;
    TBuiltInVariable    builtIn   : 9;
    TBuiltInVariable    declaredBuiltIn : 9;
    static_assert(EbvLast < 256, "need to increase size of TBuiltInVariable bitfields!");
    TPrecisionQualifier precision : 3;
    bool invariant    : 1; // require canonical treatment for cross-shader invariance
    bool centroid     : 1;
    bool smooth       : 1;
    bool flat         : 1;
    // having a constant_id is not sufficient: expressions have no id, but are still specConstant
    bool specConstant : 1;
    bool nonUniform   : 1;
    bool explicitOffset   : 1;

#ifdef GLSLANG_WEB
    bool isWriteOnly() const { return false; }
    bool isReadOnly() const { return false; }
    bool isRestrict() const { return false; }
    bool isCoherent() const { return false; }
    bool isVolatile() const { return false; }
    bool isSample() const { return false; }
    bool isMemory() const { return false; }
    bool isMemoryQualifierImageAndSSBOOnly() const { return false; }
    bool bufferReferenceNeedsVulkanMemoryModel() const { return false; }
    bool isInterpolation() const { return flat || smooth; }
    bool isExplicitInterpolation() const { return false; }
    bool isAuxiliary() const { return centroid; }
    bool isPatch() const { return false; }
    bool isNoContraction() const { return false; }
    void setNoContraction() { }
    bool isPervertexNV() const { return false; }
#else
    bool noContraction: 1; // prevent contraction and reassociation, e.g., for 'precise' keyword, and expressions it affects
    bool nopersp      : 1;
    bool explicitInterp : 1;
    bool pervertexNV  : 1;
    bool perPrimitiveNV : 1;
    bool perViewNV : 1;
    bool perTaskNV : 1;
    bool patch        : 1;
    bool sample       : 1;
    bool restrict     : 1;
    bool readonly     : 1;
    bool writeonly    : 1;
    bool coherent     : 1;
    bool volatil      : 1;
    bool devicecoherent : 1;
    bool queuefamilycoherent : 1;
    bool workgroupcoherent : 1;
    bool subgroupcoherent  : 1;
    bool shadercallcoherent : 1;
    bool nonprivate   : 1;
    bool isWriteOnly() const { return writeonly; }
    bool isReadOnly() const { return readonly; }
    bool isRestrict() const { return restrict; }
    bool isCoherent() const { return coherent; }
    bool isVolatile() const { return volatil; }
    bool isSample() const { return sample; }
    bool isMemory() const
    {
        return shadercallcoherent || subgroupcoherent || workgroupcoherent || queuefamilycoherent || devicecoherent || coherent || volatil || restrict || readonly || writeonly || nonprivate;
    }
    bool isMemoryQualifierImageAndSSBOOnly() const
    {
        return shadercallcoherent || subgroupcoherent || workgroupcoherent || queuefamilycoherent || devicecoherent || coherent || volatil || restrict || readonly || writeonly;
    }
    bool bufferReferenceNeedsVulkanMemoryModel() const
    {
        // include qualifiers that map to load/store availability/visibility/nonprivate memory access operands
        return subgroupcoherent || workgroupcoherent || queuefamilycoherent || devicecoherent || coherent || nonprivate;
    }
    bool isInterpolation() const
    {
        return flat || smooth || nopersp || explicitInterp;
    }
    bool isExplicitInterpolation() const
    {
        return explicitInterp;
    }
    bool isAuxiliary() const
    {
        return centroid || patch || sample || pervertexNV;
    }
    bool isPatch() const { return patch; }
    bool isNoContraction() const { return noContraction; }
    void setNoContraction() { noContraction = true; }
    bool isPervertexNV() const { return pervertexNV; }
#endif

    bool isPipeInput() const
    {
        switch (storage) {
        case EvqVaryingIn:
        case EvqFragCoord:
        case EvqPointCoord:
        case EvqFace:
        case EvqVertexId:
        case EvqInstanceId:
            return true;
        default:
            return false;
        }
    }

    bool isPipeOutput() const
    {
        switch (storage) {
        case EvqPosition:
        case EvqPointSize:
        case EvqClipVertex:
        case EvqVaryingOut:
        case EvqFragColor:
        case EvqFragDepth:
            return true;
        default:
            return false;
        }
    }

    bool isParamInput() const
    {
        switch (storage) {
        case EvqIn:
        case EvqInOut:
        case EvqConstReadOnly:
            return true;
        default:
            return false;
        }
    }

    bool isParamOutput() const
    {
        switch (storage) {
        case EvqOut:
        case EvqInOut:
            return true;
        default:
            return false;
        }
    }

    bool isUniformOrBuffer() const
    {
        switch (storage) {
        case EvqUniform:
        case EvqBuffer:
            return true;
        default:
            return false;
        }
    }

    bool isIo() const
    {
        switch (storage) {
        case EvqUniform:
        case EvqBuffer:
        case EvqVaryingIn:
        case EvqFragCoord:
        case EvqPointCoord:
        case EvqFace:
        case EvqVertexId:
        case EvqInstanceId:
        case EvqPosition:
        case EvqPointSize:
        case EvqClipVertex:
        case EvqVaryingOut:
        case EvqFragColor:
        case EvqFragDepth:
            return true;
        default:
            return false;
        }
    }

    // non-built-in symbols that might link between compilation units
    bool isLinkable() const
    {
        switch (storage) {
        case EvqGlobal:
        case EvqVaryingIn:
        case EvqVaryingOut:
        case EvqUniform:
        case EvqBuffer:
        case EvqShared:
            return true;
        default:
            return false;
        }
    }

#ifdef GLSLANG_WEB
    bool isPerView() const { return false; }
    bool isTaskMemory() const { return false; }
    bool isArrayedIo(EShLanguage language) const { return false; }
#else
    bool isPerPrimitive() const { return perPrimitiveNV; }
    bool isPerView() const { return perViewNV; }
    bool isTaskMemory() const { return perTaskNV; }

    // True if this type of IO is supposed to be arrayed with extra level for per-vertex data
    bool isArrayedIo(EShLanguage language) const
    {
        switch (language) {
        case EShLangGeometry:
            return isPipeInput();
        case EShLangTessControl:
            return ! patch && (isPipeInput() || isPipeOutput());
        case EShLangTessEvaluation:
            return ! patch && isPipeInput();
        case EShLangFragment:
            return pervertexNV && isPipeInput();
        case EShLangMeshNV:
            return ! perTaskNV && isPipeOutput();

        default:
            return false;
        }
    }
#endif

    // Implementing an embedded layout-qualifier class here, since C++ can't have a real class bitfield
    void clearLayout()  // all layout
    {
        clearUniformLayout();

#ifndef GLSLANG_WEB
        layoutPushConstant = false;
        layoutBufferReference = false;
        layoutPassthrough = false;
        layoutViewportRelative = false;
        // -2048 as the default value indicating layoutSecondaryViewportRelative is not set
        layoutSecondaryViewportRelativeOffset = -2048;
        layoutShaderRecord = false;
        layoutBufferReferenceAlign = layoutBufferReferenceAlignEnd;
        layoutFormat = ElfNone;
#endif

        clearInterstageLayout();

        layoutSpecConstantId = layoutSpecConstantIdEnd;
    }
    void clearInterstageLayout()
    {
        layoutLocation = layoutLocationEnd;
        layoutComponent = layoutComponentEnd;
#ifndef GLSLANG_WEB
        layoutIndex = layoutIndexEnd;
        clearStreamLayout();
        clearXfbLayout();
#endif
    }

#ifndef GLSLANG_WEB
    void clearStreamLayout()
    {
        layoutStream = layoutStreamEnd;
    }
    void clearXfbLayout()
    {
        layoutXfbBuffer = layoutXfbBufferEnd;
        layoutXfbStride = layoutXfbStrideEnd;
        layoutXfbOffset = layoutXfbOffsetEnd;
    }
#endif

    bool hasNonXfbLayout() const
    {
        return hasUniformLayout() ||
               hasAnyLocation() ||
               hasStream() ||
               hasFormat() ||
               isShaderRecord() ||
               isPushConstant() ||
               hasBufferReference();
    }
    bool hasLayout() const
    {
        return hasNonXfbLayout() ||
               hasXfb();
    }
    TLayoutMatrix  layoutMatrix  : 3;
    TLayoutPacking layoutPacking : 4;
    int layoutOffset;
    int layoutAlign;

                 unsigned int layoutLocation             : 12;
    static const unsigned int layoutLocationEnd      =  0xFFF;

                 unsigned int layoutComponent            :  3;
    static const unsigned int layoutComponentEnd      =     4;

                 unsigned int layoutSet                  :  7;
    static const unsigned int layoutSetEnd           =   0x3F;

                 unsigned int layoutBinding              : 16;
    static const unsigned int layoutBindingEnd      =  0xFFFF;

                 unsigned int layoutIndex                :  8;
    static const unsigned int layoutIndexEnd      =      0xFF;

                 unsigned int layoutStream               :  8;
    static const unsigned int layoutStreamEnd      =     0xFF;

                 unsigned int layoutXfbBuffer            :  4;
    static const unsigned int layoutXfbBufferEnd      =   0xF;

                 unsigned int layoutXfbStride            : 14;
    static const unsigned int layoutXfbStrideEnd     = 0x3FFF;

                 unsigned int layoutXfbOffset            : 13;
    static const unsigned int layoutXfbOffsetEnd     = 0x1FFF;

                 unsigned int layoutAttachment           :  8;  // for input_attachment_index
    static const unsigned int layoutAttachmentEnd      = 0XFF;

                 unsigned int layoutSpecConstantId       : 11;
    static const unsigned int layoutSpecConstantIdEnd = 0x7FF;

#ifndef GLSLANG_WEB
    // stored as log2 of the actual alignment value
                 unsigned int layoutBufferReferenceAlign :  6;
    static const unsigned int layoutBufferReferenceAlignEnd = 0x3F;

    TLayoutFormat layoutFormat                           :  8;

    bool layoutPushConstant;
    bool layoutBufferReference;
    bool layoutPassthrough;
    bool layoutViewportRelative;
    int layoutSecondaryViewportRelativeOffset;
    bool layoutShaderRecord;
#endif

    bool hasUniformLayout() const
    {
        return hasMatrix() ||
               hasPacking() ||
               hasOffset() ||
               hasBinding() ||
               hasSet() ||
               hasAlign();
    }
    void clearUniformLayout() // only uniform specific
    {
        layoutMatrix = ElmNone;
        layoutPacking = ElpNone;
        layoutOffset = layoutNotSet;
        layoutAlign = layoutNotSet;

        layoutSet = layoutSetEnd;
        layoutBinding = layoutBindingEnd;
#ifndef GLSLANG_WEB
        layoutAttachment = layoutAttachmentEnd;
#endif
    }

    bool hasMatrix() const
    {
        return layoutMatrix != ElmNone;
    }
    bool hasPacking() const
    {
        return layoutPacking != ElpNone;
    }
    bool hasAlign() const
    {
        return layoutAlign != layoutNotSet;
    }
    bool hasAnyLocation() const
    {
        return hasLocation() ||
               hasComponent() ||
               hasIndex();
    }
    bool hasLocation() const
    {
        return layoutLocation != layoutLocationEnd;
    }
    bool hasSet() const
    {
        return layoutSet != layoutSetEnd;
    }
    bool hasBinding() const
    {
        return layoutBinding != layoutBindingEnd;
    }
#ifdef GLSLANG_WEB
    bool hasOffset() const { return false; }
    bool isNonPerspective() const { return false; }
    bool hasIndex() const { return false; }
    unsigned getIndex() const { return 0; }
    bool hasComponent() const { return false; }
    bool hasStream() const { return false; }
    bool hasFormat() const { return false; }
    bool hasXfb() const { return false; }
    bool hasXfbBuffer() const { return false; }
    bool hasXfbStride() const { return false; }
    bool hasXfbOffset() const { return false; }
    bool hasAttachment() const { return false; }
    TLayoutFormat getFormat() const { return ElfNone; }
    bool isPushConstant() const { return false; }
    bool isShaderRecord() const { return false; }
    bool hasBufferReference() const { return false; }
    bool hasBufferReferenceAlign() const { return false; }
    bool isNonUniform() const { return false; }
#else
    bool hasOffset() const
    {
        return layoutOffset != layoutNotSet;
    }
    bool isNonPerspective() const { return nopersp; }
    bool hasIndex() const
    {
        return layoutIndex != layoutIndexEnd;
    }
    unsigned getIndex() const { return layoutIndex; }
    bool hasComponent() const
    {
        return layoutComponent != layoutComponentEnd;
    }
    bool hasStream() const
    {
        return layoutStream != layoutStreamEnd;
    }
    bool hasFormat() const
    {
        return layoutFormat != ElfNone;
    }
    bool hasXfb() const
    {
        return hasXfbBuffer() ||
               hasXfbStride() ||
               hasXfbOffset();
    }
    bool hasXfbBuffer() const
    {
        return layoutXfbBuffer != layoutXfbBufferEnd;
    }
    bool hasXfbStride() const
    {
        return layoutXfbStride != layoutXfbStrideEnd;
    }
    bool hasXfbOffset() const
    {
        return layoutXfbOffset != layoutXfbOffsetEnd;
    }
    bool hasAttachment() const
    {
        return layoutAttachment != layoutAttachmentEnd;
    }
    TLayoutFormat getFormat() const { return layoutFormat; }
    bool isPushConstant() const { return layoutPushConstant; }
    bool isShaderRecord() const { return layoutShaderRecord; }
    bool hasBufferReference() const { return layoutBufferReference; }
    bool hasBufferReferenceAlign() const
    {
        return layoutBufferReferenceAlign != layoutBufferReferenceAlignEnd;
    }
    bool isNonUniform() const
    {
        return nonUniform;
    }
#endif
    bool hasSpecConstantId() const
    {
        // Not the same thing as being a specialization constant, this
        // is just whether or not it was declared with an ID.
        return layoutSpecConstantId != layoutSpecConstantIdEnd;
    }
    bool isSpecConstant() const
    {
        // True if type is a specialization constant, whether or not it
        // had a specialization-constant ID, and false if it is not a
        // true front-end constant.
        return specConstant;
    }
    bool isFrontEndConstant() const
    {
        // True if the front-end knows the final constant value.
        // This allows front-end constant folding.
        return storage == EvqConst && ! specConstant;
    }
    bool isConstant() const
    {
        // True if is either kind of constant; specialization or regular.
        return isFrontEndConstant() || isSpecConstant();
    }
    void makeSpecConstant()
    {
        storage = EvqConst;
        specConstant = true;
    }
    static const char* getLayoutPackingString(TLayoutPacking packing)
    {
        switch (packing) {
        case ElpStd140:   return "std140";
#ifndef GLSLANG_WEB
        case ElpPacked:   return "packed";
        case ElpShared:   return "shared";
        case ElpStd430:   return "std430";
        case ElpScalar:   return "scalar";
#endif
        default:          return "none";
        }
    }
    static const char* getLayoutMatrixString(TLayoutMatrix m)
    {
        switch (m) {
        case ElmColumnMajor: return "column_major";
        case ElmRowMajor:    return "row_major";
        default:             return "none";
        }
    }
#ifdef GLSLANG_WEB
    static const char* getLayoutFormatString(TLayoutFormat f) { return "none"; }
#else
    static const char* getLayoutFormatString(TLayoutFormat f)
    {
        switch (f) {
        case ElfRgba32f:      return "rgba32f";
        case ElfRgba16f:      return "rgba16f";
        case ElfRg32f:        return "rg32f";
        case ElfRg16f:        return "rg16f";
        case ElfR11fG11fB10f: return "r11f_g11f_b10f";
        case ElfR32f:         return "r32f";
        case ElfR16f:         return "r16f";
        case ElfRgba16:       return "rgba16";
        case ElfRgb10A2:      return "rgb10_a2";
        case ElfRgba8:        return "rgba8";
        case ElfRg16:         return "rg16";
        case ElfRg8:          return "rg8";
        case ElfR16:          return "r16";
        case ElfR8:           return "r8";
        case ElfRgba16Snorm:  return "rgba16_snorm";
        case ElfRgba8Snorm:   return "rgba8_snorm";
        case ElfRg16Snorm:    return "rg16_snorm";
        case ElfRg8Snorm:     return "rg8_snorm";
        case ElfR16Snorm:     return "r16_snorm";
        case ElfR8Snorm:      return "r8_snorm";

        case ElfRgba32i:      return "rgba32i";
        case ElfRgba16i:      return "rgba16i";
        case ElfRgba8i:       return "rgba8i";
        case ElfRg32i:        return "rg32i";
        case ElfRg16i:        return "rg16i";
        case ElfRg8i:         return "rg8i";
        case ElfR32i:         return "r32i";
        case ElfR16i:         return "r16i";
        case ElfR8i:          return "r8i";

        case ElfRgba32ui:     return "rgba32ui";
        case ElfRgba16ui:     return "rgba16ui";
        case ElfRgba8ui:      return "rgba8ui";
        case ElfRg32ui:       return "rg32ui";
        case ElfRg16ui:       return "rg16ui";
        case ElfRgb10a2ui:    return "rgb10_a2ui";
        case ElfRg8ui:        return "rg8ui";
        case ElfR32ui:        return "r32ui";
        case ElfR16ui:        return "r16ui";
        case ElfR8ui:         return "r8ui";
        default:              return "none";
        }
    }
    static const char* getLayoutDepthString(TLayoutDepth d)
    {
        switch (d) {
        case EldAny:       return "depth_any";
        case EldGreater:   return "depth_greater";
        case EldLess:      return "depth_less";
        case EldUnchanged: return "depth_unchanged";
        default:           return "none";
        }
    }
    static const char* getBlendEquationString(TBlendEquationShift e)
    {
        switch (e) {
        case EBlendMultiply:      return "blend_support_multiply";
        case EBlendScreen:        return "blend_support_screen";
        case EBlendOverlay:       return "blend_support_overlay";
        case EBlendDarken:        return "blend_support_darken";
        case EBlendLighten:       return "blend_support_lighten";
        case EBlendColordodge:    return "blend_support_colordodge";
        case EBlendColorburn:     return "blend_support_colorburn";
        case EBlendHardlight:     return "blend_support_hardlight";
        case EBlendSoftlight:     return "blend_support_softlight";
        case EBlendDifference:    return "blend_support_difference";
        case EBlendExclusion:     return "blend_support_exclusion";
        case EBlendHslHue:        return "blend_support_hsl_hue";
        case EBlendHslSaturation: return "blend_support_hsl_saturation";
        case EBlendHslColor:      return "blend_support_hsl_color";
        case EBlendHslLuminosity: return "blend_support_hsl_luminosity";
        case EBlendAllEquations:  return "blend_support_all_equations";
        default:                  return "unknown";
        }
    }
    static const char* getGeometryString(TLayoutGeometry geometry)
    {
        switch (geometry) {
        case ElgPoints:             return "points";
        case ElgLines:              return "lines";
        case ElgLinesAdjacency:     return "lines_adjacency";
        case ElgLineStrip:          return "line_strip";
        case ElgTriangles:          return "triangles";
        case ElgTrianglesAdjacency: return "triangles_adjacency";
        case ElgTriangleStrip:      return "triangle_strip";
        case ElgQuads:              return "quads";
        case ElgIsolines:           return "isolines";
        default:                    return "none";
        }
    }
    static const char* getVertexSpacingString(TVertexSpacing spacing)
    {
        switch (spacing) {
        case EvsEqual:              return "equal_spacing";
        case EvsFractionalEven:     return "fractional_even_spacing";
        case EvsFractionalOdd:      return "fractional_odd_spacing";
        default:                    return "none";
        }
    }
    static const char* getVertexOrderString(TVertexOrder order)
    {
        switch (order) {
        case EvoCw:                 return "cw";
        case EvoCcw:                return "ccw";
        default:                    return "none";
        }
    }
    static int mapGeometryToSize(TLayoutGeometry geometry)
    {
        switch (geometry) {
        case ElgPoints:             return 1;
        case ElgLines:              return 2;
        case ElgLinesAdjacency:     return 4;
        case ElgTriangles:          return 3;
        case ElgTrianglesAdjacency: return 6;
        default:                    return 0;
        }
    }
    static const char* getInterlockOrderingString(TInterlockOrdering order)
    {
        switch (order) {
        case EioPixelInterlockOrdered:          return "pixel_interlock_ordered";
        case EioPixelInterlockUnordered:        return "pixel_interlock_unordered";
        case EioSampleInterlockOrdered:         return "sample_interlock_ordered";
        case EioSampleInterlockUnordered:       return "sample_interlock_unordered";
        case EioShadingRateInterlockOrdered:    return "shading_rate_interlock_ordered";
        case EioShadingRateInterlockUnordered:  return "shading_rate_interlock_unordered";
        default:                                return "none";
        }
    }
#endif
};

// Qualifiers that don't need to be keep per object.  They have shader scope, not object scope.
// So, they will not be part of TType, TQualifier, etc.
struct TShaderQualifiers {
    TLayoutGeometry geometry; // geometry/tessellation shader in/out primitives
    bool pixelCenterInteger;  // fragment shader
    bool originUpperLeft;     // fragment shader
    int invocations;
    int vertices;             // for tessellation "vertices", geometry & mesh "max_vertices"
    TVertexSpacing spacing;
    TVertexOrder order;
    bool pointMode;
    int localSize[3];         // compute shader
    bool localSizeNotDefault[3];        // compute shader
    int localSizeSpecId[3];   // compute shader specialization id for gl_WorkGroupSize
#ifndef GLSLANG_WEB
    bool earlyFragmentTests;  // fragment input
    bool postDepthCoverage;   // fragment input
    TLayoutDepth layoutDepth;
    bool blendEquation;       // true if any blend equation was specified
    int numViews;             // multiview extenstions
    TInterlockOrdering interlockOrdering;
    bool layoutOverrideCoverage;        // true if layout override_coverage set
    bool layoutDerivativeGroupQuads;    // true if layout derivative_group_quadsNV set
    bool layoutDerivativeGroupLinear;   // true if layout derivative_group_linearNV set
    int primitives;                     // mesh shader "max_primitives"DerivativeGroupLinear;   // true if layout derivative_group_linearNV set
    bool layoutPrimitiveCulling;        // true if layout primitive_culling set
    TLayoutDepth getDepth() const { return layoutDepth; }
#else
    TLayoutDepth getDepth() const { return EldNone; }
#endif

    void init()
    {
        geometry = ElgNone;
        originUpperLeft = false;
        pixelCenterInteger = false;
        invocations = TQualifier::layoutNotSet;
        vertices = TQualifier::layoutNotSet;
        spacing = EvsNone;
        order = EvoNone;
        pointMode = false;
        localSize[0] = 1;
        localSize[1] = 1;
        localSize[2] = 1;
        localSizeNotDefault[0] = false;
        localSizeNotDefault[1] = false;
        localSizeNotDefault[2] = false;
        localSizeSpecId[0] = TQualifier::layoutNotSet;
        localSizeSpecId[1] = TQualifier::layoutNotSet;
        localSizeSpecId[2] = TQualifier::layoutNotSet;
#ifndef GLSLANG_WEB
        earlyFragmentTests = false;
        postDepthCoverage = false;
        layoutDepth = EldNone;
        blendEquation = false;
        numViews = TQualifier::layoutNotSet;
        layoutOverrideCoverage      = false;
        layoutDerivativeGroupQuads  = false;
        layoutDerivativeGroupLinear = false;
        layoutPrimitiveCulling      = false;
        primitives                  = TQualifier::layoutNotSet;
        interlockOrdering = EioNone;
#endif
    }

#ifdef GLSLANG_WEB
    bool hasBlendEquation() const { return false; }
#else
    bool hasBlendEquation() const { return blendEquation; }
#endif

    // Merge in characteristics from the 'src' qualifier.  They can override when
    // set, but never erase when not set.
    void merge(const TShaderQualifiers& src)
    {
        if (src.geometry != ElgNone)
            geometry = src.geometry;
        if (src.pixelCenterInteger)
            pixelCenterInteger = src.pixelCenterInteger;
        if (src.originUpperLeft)
            originUpperLeft = src.originUpperLeft;
        if (src.invocations != TQualifier::layoutNotSet)
            invocations = src.invocations;
        if (src.vertices != TQualifier::layoutNotSet)
            vertices = src.vertices;
        if (src.spacing != EvsNone)
            spacing = src.spacing;
        if (src.order != EvoNone)
            order = src.order;
        if (src.pointMode)
            pointMode = true;
        for (int i = 0; i < 3; ++i) {
            if (src.localSize[i] > 1)
                localSize[i] = src.localSize[i];
        }
        for (int i = 0; i < 3; ++i) {
            localSizeNotDefault[i] = src.localSizeNotDefault[i] || localSizeNotDefault[i];
        }
        for (int i = 0; i < 3; ++i) {
            if (src.localSizeSpecId[i] != TQualifier::layoutNotSet)
                localSizeSpecId[i] = src.localSizeSpecId[i];
        }
#ifndef GLSLANG_WEB
        if (src.earlyFragmentTests)
            earlyFragmentTests = true;
        if (src.postDepthCoverage)
            postDepthCoverage = true;
        if (src.layoutDepth)
            layoutDepth = src.layoutDepth;
        if (src.blendEquation)
            blendEquation = src.blendEquation;
        if (src.numViews != TQualifier::layoutNotSet)
            numViews = src.numViews;
        if (src.layoutOverrideCoverage)
            layoutOverrideCoverage = src.layoutOverrideCoverage;
        if (src.layoutDerivativeGroupQuads)
            layoutDerivativeGroupQuads = src.layoutDerivativeGroupQuads;
        if (src.layoutDerivativeGroupLinear)
            layoutDerivativeGroupLinear = src.layoutDerivativeGroupLinear;
        if (src.primitives != TQualifier::layoutNotSet)
            primitives = src.primitives;
        if (src.interlockOrdering != EioNone)
            interlockOrdering = src.interlockOrdering;
        if (src.layoutPrimitiveCulling)
            layoutPrimitiveCulling = src.layoutPrimitiveCulling;
#endif
    }
};

//
// TPublicType is just temporarily used while parsing and not quite the same
// information kept per node in TType.  Due to the bison stack, it can't have
// types that it thinks have non-trivial constructors.  It should
// just be used while recognizing the grammar, not anything else.
// Once enough is known about the situation, the proper information
// moved into a TType, or the parse context, etc.
//
class TPublicType {
public:
    TBasicType basicType;
    TSampler sampler;
    TQualifier qualifier;
    TShaderQualifiers shaderQualifiers;
    int vectorSize : 4;
    int matrixCols : 4;
    int matrixRows : 4;
    bool coopmat   : 1;
    TArraySizes* arraySizes;
    const TType* userDef;
    TSourceLoc loc;
    TArraySizes* typeParameters;

#ifdef GLSLANG_WEB
    bool isCoopmat() const { return false; }
#else
    bool isCoopmat() const { return coopmat; }
#endif

    void initType(const TSourceLoc& l)
    {
        basicType = EbtVoid;
        vectorSize = 1;
        matrixRows = 0;
        matrixCols = 0;
        arraySizes = nullptr;
        userDef = nullptr;
        loc = l;
        typeParameters = nullptr;
        coopmat = false;
    }

    void initQualifiers(bool global = false)
    {
        qualifier.clear();
        if (global)
            qualifier.storage = EvqGlobal;
    }

    void init(const TSourceLoc& l, bool global = false)
    {
        initType(l);
        sampler.clear();
        initQualifiers(global);
        shaderQualifiers.init();
    }

    void setVector(int s)
    {
        matrixRows = 0;
        matrixCols = 0;
        vectorSize = s;
    }

    void setMatrix(int c, int r)
    {
        matrixRows = r;
        matrixCols = c;
        vectorSize = 0;
    }

    bool isScalar() const
    {
        return matrixCols == 0 && vectorSize == 1 && arraySizes == nullptr && userDef == nullptr;
    }

    // "Image" is a superset of "Subpass"
    bool isImage()   const { return basicType == EbtSampler && sampler.isImage(); }
    bool isSubpass() const { return basicType == EbtSampler && sampler.isSubpass(); }
};

//
// Base class for things that have a type.
//
class TType {
public:
    POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator())

    // for "empty" type (no args) or simple scalar/vector/matrix
    explicit TType(TBasicType t = EbtVoid, TStorageQualifier q = EvqTemporary, int vs = 1, int mc = 0, int mr = 0,
                   bool isVector = false) :
                            basicType(t), vectorSize(vs), matrixCols(mc), matrixRows(mr), vector1(isVector && vs == 1), coopmat(false),
                            arraySizes(nullptr), structure(nullptr), fieldName(nullptr), typeName(nullptr), typeParameters(nullptr)
                            {
                                sampler.clear();
                                qualifier.clear();
                                qualifier.storage = q;
                                assert(!(isMatrix() && vectorSize != 0));  // prevent vectorSize != 0 on matrices
                            }
    // for explicit precision qualifier
    TType(TBasicType t, TStorageQualifier q, TPrecisionQualifier p, int vs = 1, int mc = 0, int mr = 0,
          bool isVector = false) :
                            basicType(t), vectorSize(vs), matrixCols(mc), matrixRows(mr), vector1(isVector && vs == 1), coopmat(false),
                            arraySizes(nullptr), structure(nullptr), fieldName(nullptr), typeName(nullptr), typeParameters(nullptr)
                            {
                                sampler.clear();
                                qualifier.clear();
                                qualifier.storage = q;
                                qualifier.precision = p;
                                assert(p >= EpqNone && p <= EpqHigh);
                                assert(!(isMatrix() && vectorSize != 0));  // prevent vectorSize != 0 on matrices
                            }
    // for turning a TPublicType into a TType, using a shallow copy
    explicit TType(const TPublicType& p) :
                            basicType(p.basicType),
                            vectorSize(p.vectorSize), matrixCols(p.matrixCols), matrixRows(p.matrixRows), vector1(false), coopmat(p.coopmat),
                            arraySizes(p.arraySizes), structure(nullptr), fieldName(nullptr), typeName(nullptr), typeParameters(p.typeParameters)
                            {
                                if (basicType == EbtSampler)
                                    sampler = p.sampler;
                                else
                                    sampler.clear();
                                qualifier = p.qualifier;
                                if (p.userDef) {
                                    if (p.userDef->basicType == EbtReference) {
                                        basicType = EbtReference;
                                        referentType = p.userDef->referentType;
                                    } else {
                                        structure = p.userDef->getWritableStruct();  // public type is short-lived; there are no sharing issues
                                    }
                                    typeName = NewPoolTString(p.userDef->getTypeName().c_str());
                                }
                                if (p.isCoopmat() && p.typeParameters && p.typeParameters->getNumDims() > 0) {
                                    int numBits = p.typeParameters->getDimSize(0);
                                    if (p.basicType == EbtFloat && numBits == 16) {
                                        basicType = EbtFloat16;
                                        qualifier.precision = EpqNone;
                                    } else if (p.basicType == EbtUint && numBits == 8) {
                                        basicType = EbtUint8;
                                        qualifier.precision = EpqNone;
                                    } else if (p.basicType == EbtInt && numBits == 8) {
                                        basicType = EbtInt8;
                                        qualifier.precision = EpqNone;
                                    }
                                }
                            }
    // for construction of sampler types
    TType(const TSampler& sampler, TStorageQualifier q = EvqUniform, TArraySizes* as = nullptr) :
        basicType(EbtSampler), vectorSize(1), matrixCols(0), matrixRows(0), vector1(false), coopmat(false),
        arraySizes(as), structure(nullptr), fieldName(nullptr), typeName(nullptr),
        sampler(sampler), typeParameters(nullptr)
    {
        qualifier.clear();
        qualifier.storage = q;
    }
    // to efficiently make a dereferenced type
    // without ever duplicating the outer structure that will be thrown away
    // and using only shallow copy
    TType(const TType& type, int derefIndex, bool rowMajor = false)
                            {
                                if (type.isArray()) {
                                    shallowCopy(type);
                                    if (type.getArraySizes()->getNumDims() == 1) {
                                        arraySizes = nullptr;
                                    } else {
                                        // want our own copy of the array, so we can edit it
                                        arraySizes = new TArraySizes;
                                        arraySizes->copyDereferenced(*type.arraySizes);
                                    }
                                } else if (type.basicType == EbtStruct || type.basicType == EbtBlock) {
                                    // do a structure dereference
                                    const TTypeList& memberList = *type.getStruct();
                                    shallowCopy(*memberList[derefIndex].type);
                                    return;
                                } else {
                                    // do a vector/matrix dereference
                                    shallowCopy(type);
                                    if (matrixCols > 0) {
                                        // dereference from matrix to vector
                                        if (rowMajor)
                                            vectorSize = matrixCols;
                                        else
                                            vectorSize = matrixRows;
                                        matrixCols = 0;
                                        matrixRows = 0;
                                        if (vectorSize == 1)
                                            vector1 = true;
                                    } else if (isVector()) {
                                        // dereference from vector to scalar
                                        vectorSize = 1;
                                        vector1 = false;
                                    } else if (isCoopMat()) {
                                        coopmat = false;
                                        typeParameters = nullptr;
                                    }
                                }
                            }
    // for making structures, ...
    TType(TTypeList* userDef, const TString& n) :
                            basicType(EbtStruct), vectorSize(1), matrixCols(0), matrixRows(0), vector1(false), coopmat(false),
                            arraySizes(nullptr), structure(userDef), fieldName(nullptr), typeParameters(nullptr)
                            {
                                sampler.clear();
                                qualifier.clear();
                                typeName = NewPoolTString(n.c_str());
                            }
    // For interface blocks
    TType(TTypeList* userDef, const TString& n, const TQualifier& q) :
                            basicType(EbtBlock), vectorSize(1), matrixCols(0), matrixRows(0), vector1(false), coopmat(false),
                            qualifier(q), arraySizes(nullptr), structure(userDef), fieldName(nullptr), typeParameters(nullptr)
                            {
                                sampler.clear();
                                typeName = NewPoolTString(n.c_str());
                            }
    // for block reference (first parameter must be EbtReference)
    explicit TType(TBasicType t, const TType &p, const TString& n) :
                            basicType(t), vectorSize(1), matrixCols(0), matrixRows(0), vector1(false),
                            arraySizes(nullptr), structure(nullptr), fieldName(nullptr), typeName(nullptr)
                            {
                                assert(t == EbtReference);
                                typeName = NewPoolTString(n.c_str());
                                qualifier.clear();
                                qualifier.storage = p.qualifier.storage;
                                referentType = p.clone();
                            }
    virtual ~TType() {}

    // Not for use across pool pops; it will cause multiple instances of TType to point to the same information.
    // This only works if that information (like a structure's list of types) does not change and
    // the instances are sharing the same pool.
    void shallowCopy(const TType& copyOf)
    {
        basicType = copyOf.basicType;
        sampler = copyOf.sampler;
        qualifier = copyOf.qualifier;
        vectorSize = copyOf.vectorSize;
        matrixCols = copyOf.matrixCols;
        matrixRows = copyOf.matrixRows;
        vector1 = copyOf.vector1;
        arraySizes = copyOf.arraySizes;  // copying the pointer only, not the contents
        fieldName = copyOf.fieldName;
        typeName = copyOf.typeName;
        if (isStruct()) {
            structure = copyOf.structure;
        } else {
            referentType = copyOf.referentType;
        }
        typeParameters = copyOf.typeParameters;
        coopmat = copyOf.isCoopMat();
    }

    // Make complete copy of the whole type graph rooted at 'copyOf'.
    void deepCopy(const TType& copyOf)
    {
        TMap<TTypeList*,TTypeList*> copied;  // to enable copying a type graph as a graph, not a tree
        deepCopy(copyOf, copied);
    }

    // Recursively make temporary
    void makeTemporary()
    {
        getQualifier().makeTemporary();

        if (isStruct())
            for (unsigned int i = 0; i < structure->size(); ++i)
                (*structure)[i].type->makeTemporary();
    }

    TType* clone() const
    {
        TType *newType = new TType();
        newType->deepCopy(*this);

        return newType;
    }

    void makeVector() { vector1 = true; }

    virtual void hideMember() { basicType = EbtVoid; vectorSize = 1; }
    virtual bool hiddenMember() const { return basicType == EbtVoid; }

    virtual void setFieldName(const TString& n) { fieldName = NewPoolTString(n.c_str()); }
    virtual const TString& getTypeName() const
    {
        assert(typeName);
        return *typeName;
    }

    virtual const TString& getFieldName() const
    {
        assert(fieldName);
        return *fieldName;
    }
    TShaderInterface getShaderInterface() const
    {
        if (basicType != EbtBlock)
            return EsiNone;

        switch (qualifier.storage) {
        default:
            return EsiNone;
        case EvqVaryingIn:
            return EsiInput;
        case EvqVaryingOut:
            return EsiOutput;
        case EvqUniform:
        case EvqBuffer:
            return EsiUniform;
        }
    }

    virtual TBasicType getBasicType() const { return basicType; }
    virtual const TSampler& getSampler() const { return sampler; }
    virtual TSampler& getSampler() { return sampler; }

    virtual       TQualifier& getQualifier()       { return qualifier; }
    virtual const TQualifier& getQualifier() const { return qualifier; }

    virtual int getVectorSize() const { return vectorSize; }  // returns 1 for either scalar or vector of size 1, valid for both
    virtual int getMatrixCols() const { return matrixCols; }
    virtual int getMatrixRows() const { return matrixRows; }
    virtual int getOuterArraySize()  const { return arraySizes->getOuterSize(); }
    virtual TIntermTyped*  getOuterArrayNode() const { return arraySizes->getOuterNode(); }
    virtual int getCumulativeArraySize()  const { return arraySizes->getCumulativeSize(); }
#ifdef GLSLANG_WEB
    bool isArrayOfArrays() const { return false; }
#else
    bool isArrayOfArrays() const { return arraySizes != nullptr && arraySizes->getNumDims() > 1; }
#endif
    virtual int getImplicitArraySize() const { return arraySizes->getImplicitSize(); }
    virtual const TArraySizes* getArraySizes() const { return arraySizes; }
    virtual       TArraySizes* getArraySizes()       { return arraySizes; }
    virtual TType* getReferentType() const { return referentType; }
    virtual const TArraySizes* getTypeParameters() const { return typeParameters; }
    virtual       TArraySizes* getTypeParameters()       { return typeParameters; }

    virtual bool isScalar() const { return ! isVector() && ! isMatrix() && ! isStruct() && ! isArray(); }
    virtual bool isScalarOrVec1() const { return isScalar() || vector1; }
    virtual bool isVector() const { return vectorSize > 1 || vector1; }
    virtual bool isMatrix() const { return matrixCols ? true : false; }
    virtual bool isArray()  const { return arraySizes != nullptr; }
    virtual bool isSizedArray() const { return isArray() && arraySizes->isSized(); }
    virtual bool isUnsizedArray() const { return isArray() && !arraySizes->isSized(); }
    virtual bool isArrayVariablyIndexed() const { assert(isArray()); return arraySizes->isVariablyIndexed(); }
    virtual void setArrayVariablyIndexed() { assert(isArray()); arraySizes->setVariablyIndexed(); }
    virtual void updateImplicitArraySize(int size) { assert(isArray()); arraySizes->updateImplicitSize(size); }
    virtual bool isStruct() const { return basicType == EbtStruct || basicType == EbtBlock; }
    virtual bool isFloatingDomain() const { return basicType == EbtFloat || basicType == EbtDouble || basicType == EbtFloat16; }
    virtual bool isIntegerDomain() const
    {
        switch (basicType) {
        case EbtInt8:
        case EbtUint8:
        case EbtInt16:
        case EbtUint16:
        case EbtInt:
        case EbtUint:
        case EbtInt64:
        case EbtUint64:
        case EbtAtomicUint:
            return true;
        default:
            break;
        }
        return false;
    }
    virtual bool isOpaque() const { return basicType == EbtSampler
#ifndef GLSLANG_WEB
         || basicType == EbtAtomicUint || basicType == EbtAccStruct || basicType == EbtRayQuery
#endif
        ; }
    virtual bool isBuiltIn() const { return getQualifier().builtIn != EbvNone; }

    // "Image" is a superset of "Subpass"
    virtual bool isImage()   const { return basicType == EbtSampler && getSampler().isImage(); }
    virtual bool isSubpass() const { return basicType == EbtSampler && getSampler().isSubpass(); }
    virtual bool isTexture() const { return basicType == EbtSampler && getSampler().isTexture(); }
    // Check the block-name convention of creating a block without populating it's members:
    virtual bool isUnusableName() const { return isStruct() && structure == nullptr; }
    virtual bool isParameterized()  const { return typeParameters != nullptr; }
#ifdef GLSLANG_WEB
    bool isAtomic() const { return false; }
    bool isCoopMat() const { return false; }
    bool isReference() const { return false; }
#else
    bool isAtomic() const { return basicType == EbtAtomicUint; }
    bool isCoopMat() const { return coopmat; }
    bool isReference() const { return getBasicType() == EbtReference; }
#endif

    // return true if this type contains any subtype which satisfies the given predicate.
    template <typename P>
    bool contains(P predicate) const
    {
        if (predicate(this))
            return true;

        const auto hasa = [predicate](const TTypeLoc& tl) { return tl.type->contains(predicate); };

        return isStruct() && std::any_of(structure->begin(), structure->end(), hasa);
    }

    // Recursively checks if the type contains the given basic type
    virtual bool containsBasicType(TBasicType checkType) const
    {
        return contains([checkType](const TType* t) { return t->basicType == checkType; } );
    }

    // Recursively check the structure for any arrays, needed for some error checks
    virtual bool containsArray() const
    {
        return contains([](const TType* t) { return t->isArray(); } );
    }

    // Check the structure for any structures, needed for some error checks
    virtual bool containsStructure() const
    {
        return contains([this](const TType* t) { return t != this && t->isStruct(); } );
    }

    // Recursively check the structure for any unsized arrays, needed for triggering a copyUp().
    virtual bool containsUnsizedArray() const
    {
        return contains([](const TType* t) { return t->isUnsizedArray(); } );
    }

    virtual bool containsOpaque() const
    {
        return contains([](const TType* t) { return t->isOpaque(); } );
    }

    // Recursively checks if the type contains a built-in variable
    virtual bool containsBuiltIn() const
    {
        return contains([](const TType* t) { return t->isBuiltIn(); } );
    }

    virtual bool containsNonOpaque() const
    {
        const auto nonOpaque = [](const TType* t) {
            switch (t->basicType) {
            case EbtVoid:
            case EbtFloat:
            case EbtDouble:
            case EbtFloat16:
            case EbtInt8:
            case EbtUint8:
            case EbtInt16:
            case EbtUint16:
            case EbtInt:
            case EbtUint:
            case EbtInt64:
            case EbtUint64:
            case EbtBool:
            case EbtReference:
                return true;
            default:
                return false;
            }
        };

        return contains(nonOpaque);
    }

    virtual bool containsSpecializationSize() const
    {
        return contains([](const TType* t) { return t->isArray() && t->arraySizes->isOuterSpecialization(); } );
    }

#ifdef GLSLANG_WEB
    bool containsDouble() const { return false; }
    bool contains16BitFloat() const { return false; }
    bool contains64BitInt() const { return false; }
    bool contains16BitInt() const { return false; }
    bool contains8BitInt() const { return false; }
    bool containsCoopMat() const { return false; }
    bool containsReference() const { return false; }
#else
    bool containsDouble() const
    {
        return containsBasicType(EbtDouble);
    }
    bool contains16BitFloat() const
    {
        return containsBasicType(EbtFloat16);
    }
    bool contains64BitInt() const
    {
        return containsBasicType(EbtInt64) || containsBasicType(EbtUint64);
    }
    bool contains16BitInt() const
    {
        return containsBasicType(EbtInt16) || containsBasicType(EbtUint16);
    }
    bool contains8BitInt() const
    {
        return containsBasicType(EbtInt8) || containsBasicType(EbtUint8);
    }
    bool containsCoopMat() const
    {
        return contains([](const TType* t) { return t->coopmat; } );
    }
    bool containsReference() const
    {
        return containsBasicType(EbtReference);
    }
#endif

    // Array editing methods.  Array descriptors can be shared across
    // type instances.  This allows all uses of the same array
    // to be updated at once.  E.g., all nodes can be explicitly sized
    // by tracking and correcting one implicit size.  Or, all nodes
    // can get the explicit size on a redeclaration that gives size.
    //
    // N.B.:  Don't share with the shared symbol tables (symbols are
    // marked as isReadOnly().  Such symbols with arrays that will be
    // edited need to copyUp() on first use, so that
    // A) the edits don't effect the shared symbol table, and
    // B) the edits are shared across all users.
    void updateArraySizes(const TType& type)
    {
        // For when we may already be sharing existing array descriptors,
        // keeping the pointers the same, just updating the contents.
        assert(arraySizes != nullptr);
        assert(type.arraySizes != nullptr);
        *arraySizes = *type.arraySizes;
    }
    void copyArraySizes(const TArraySizes& s)
    {
        // For setting a fresh new set of array sizes, not yet worrying about sharing.
        arraySizes = new TArraySizes;
        *arraySizes = s;
    }
    void transferArraySizes(TArraySizes* s)
    {
        // For setting an already allocated set of sizes that this type can use
        // (no copy made).
        arraySizes = s;
    }
    void clearArraySizes()
    {
        arraySizes = nullptr;
    }

    // Add inner array sizes, to any existing sizes, via copy; the
    // sizes passed in can still be reused for other purposes.
    void copyArrayInnerSizes(const TArraySizes* s)
    {
        if (s != nullptr) {
            if (arraySizes == nullptr)
                copyArraySizes(*s);
            else
                arraySizes->addInnerSizes(*s);
        }
    }
    void changeOuterArraySize(int s) { arraySizes->changeOuterSize(s); }

    // Recursively make the implicit array size the explicit array size.
    // Expicit arrays are compile-time or link-time sized, never run-time sized.
    // Sometimes, policy calls for an array to be run-time sized even if it was
    // never variably indexed: Don't turn a 'skipNonvariablyIndexed' array into
    // an explicit array.
    void adoptImplicitArraySizes(bool skipNonvariablyIndexed)
    {
        if (isUnsizedArray() && !(skipNonvariablyIndexed || isArrayVariablyIndexed()))
            changeOuterArraySize(getImplicitArraySize());
        // For multi-dim per-view arrays, set unsized inner dimension size to 1
        if (qualifier.isPerView() && arraySizes && arraySizes->isInnerUnsized())
            arraySizes->clearInnerUnsized();
        if (isStruct() && structure->size() > 0) {
            int lastMember = (int)structure->size() - 1;
            for (int i = 0; i < lastMember; ++i)
                (*structure)[i].type->adoptImplicitArraySizes(false);
            // implement the "last member of an SSBO" policy
            (*structure)[lastMember].type->adoptImplicitArraySizes(getQualifier().storage == EvqBuffer);
        }
    }


    void updateTypeParameters(const TType& type)
    {
        // For when we may already be sharing existing array descriptors,
        // keeping the pointers the same, just updating the contents.
        assert(typeParameters != nullptr);
        assert(type.typeParameters != nullptr);
        *typeParameters = *type.typeParameters;
    }
    void copyTypeParameters(const TArraySizes& s)
    {
        // For setting a fresh new set of type parameters, not yet worrying about sharing.
        typeParameters = new TArraySizes;
        *typeParameters = s;
    }
    void transferTypeParameters(TArraySizes* s)
    {
        // For setting an already allocated set of sizes that this type can use
        // (no copy made).
        typeParameters = s;
    }
    void clearTypeParameters()
    {
        typeParameters = nullptr;
    }

    // Add inner array sizes, to any existing sizes, via copy; the
    // sizes passed in can still be reused for other purposes.
    void copyTypeParametersInnerSizes(const TArraySizes* s)
    {
        if (s != nullptr) {
            if (typeParameters == nullptr)
                copyTypeParameters(*s);
            else
                typeParameters->addInnerSizes(*s);
        }
    }



    const char* getBasicString() const
    {
        return TType::getBasicString(basicType);
    }

    static const char* getBasicString(TBasicType t)
    {
        switch (t) {
        case EbtFloat:             return "float";
        case EbtInt:               return "int";
        case EbtUint:              return "uint";
        case EbtSampler:           return "sampler/image";
#ifndef GLSLANG_WEB
        case EbtVoid:              return "void";
        case EbtDouble:            return "double";
        case EbtFloat16:           return "float16_t";
        case EbtInt8:              return "int8_t";
        case EbtUint8:             return "uint8_t";
        case EbtInt16:             return "int16_t";
        case EbtUint16:            return "uint16_t";
        case EbtInt64:             return "int64_t";
        case EbtUint64:            return "uint64_t";
        case EbtBool:              return "bool";
        case EbtAtomicUint:        return "atomic_uint";
        case EbtStruct:            return "structure";
        case EbtBlock:             return "block";
        case EbtAccStruct:         return "accelerationStructureNV";
        case EbtRayQuery:          return "rayQueryEXT";
        case EbtReference:         return "reference";
#endif
        default:                   return "unknown type";
        }
    }

#ifdef GLSLANG_WEB
    TString getCompleteString() const { return ""; }
    const char* getStorageQualifierString() const { return ""; }
    const char* getBuiltInVariableString() const { return ""; }
    const char* getPrecisionQualifierString() const { return ""; }
    TString getBasicTypeString() const { return ""; }
#else
    TString getCompleteString() const
    {
        TString typeString;

        const auto appendStr  = [&](const char* s)  { typeString.append(s); };
        const auto appendUint = [&](unsigned int u) { typeString.append(std::to_string(u).c_str()); };
        const auto appendInt  = [&](int i)          { typeString.append(std::to_string(i).c_str()); };

        if (qualifier.hasLayout()) {
            // To reduce noise, skip this if the only layout is an xfb_buffer
            // with no triggering xfb_offset.
            TQualifier noXfbBuffer = qualifier;
            noXfbBuffer.layoutXfbBuffer = TQualifier::layoutXfbBufferEnd;
            if (noXfbBuffer.hasLayout()) {
                appendStr("layout(");
                if (qualifier.hasAnyLocation()) {
                    appendStr(" location=");
                    appendUint(qualifier.layoutLocation);
                    if (qualifier.hasComponent()) {
                        appendStr(" component=");
                        appendUint(qualifier.layoutComponent);
                    }
                    if (qualifier.hasIndex()) {
                        appendStr(" index=");
                        appendUint(qualifier.layoutIndex);
                    }
                }
                if (qualifier.hasSet()) {
                    appendStr(" set=");
                    appendUint(qualifier.layoutSet);
                }
                if (qualifier.hasBinding()) {
                    appendStr(" binding=");
                    appendUint(qualifier.layoutBinding);
                }
                if (qualifier.hasStream()) {
                    appendStr(" stream=");
                    appendUint(qualifier.layoutStream);
                }
                if (qualifier.hasMatrix()) {
                    appendStr(" ");
                    appendStr(TQualifier::getLayoutMatrixString(qualifier.layoutMatrix));
                }
                if (qualifier.hasPacking()) {
                    appendStr(" ");
                    appendStr(TQualifier::getLayoutPackingString(qualifier.layoutPacking));
                }
                if (qualifier.hasOffset()) {
                    appendStr(" offset=");
                    appendInt(qualifier.layoutOffset);
                }
                if (qualifier.hasAlign()) {
                    appendStr(" align=");
                    appendInt(qualifier.layoutAlign);
                }
                if (qualifier.hasFormat()) {
                    appendStr(" ");
                    appendStr(TQualifier::getLayoutFormatString(qualifier.layoutFormat));
                }
                if (qualifier.hasXfbBuffer() && qualifier.hasXfbOffset()) {
                    appendStr(" xfb_buffer=");
                    appendUint(qualifier.layoutXfbBuffer);
                }
                if (qualifier.hasXfbOffset()) {
                    appendStr(" xfb_offset=");
                    appendUint(qualifier.layoutXfbOffset);
                }
                if (qualifier.hasXfbStride()) {
                    appendStr(" xfb_stride=");
                    appendUint(qualifier.layoutXfbStride);
                }
                if (qualifier.hasAttachment()) {
                    appendStr(" input_attachment_index=");
                    appendUint(qualifier.layoutAttachment);
                }
                if (qualifier.hasSpecConstantId()) {
                    appendStr(" constant_id=");
                    appendUint(qualifier.layoutSpecConstantId);
                }
                if (qualifier.layoutPushConstant)
                    appendStr(" push_constant");
                if (qualifier.layoutBufferReference)
                    appendStr(" buffer_reference");
                if (qualifier.hasBufferReferenceAlign()) {
                    appendStr(" buffer_reference_align=");
                    appendUint(1u << qualifier.layoutBufferReferenceAlign);
                }

                if (qualifier.layoutPassthrough)
                    appendStr(" passthrough");
                if (qualifier.layoutViewportRelative)
                    appendStr(" layoutViewportRelative");
                if (qualifier.layoutSecondaryViewportRelativeOffset != -2048) {
                    appendStr(" layoutSecondaryViewportRelativeOffset=");
                    appendInt(qualifier.layoutSecondaryViewportRelativeOffset);
                }
                if (qualifier.layoutShaderRecord)
                    appendStr(" shaderRecordNV");

                appendStr(")");
            }
        }

        if (qualifier.invariant)
            appendStr(" invariant");
        if (qualifier.noContraction)
            appendStr(" noContraction");
        if (qualifier.centroid)
            appendStr(" centroid");
        if (qualifier.smooth)
            appendStr(" smooth");
        if (qualifier.flat)
            appendStr(" flat");
        if (qualifier.nopersp)
            appendStr(" noperspective");
        if (qualifier.explicitInterp)
            appendStr(" __explicitInterpAMD");
        if (qualifier.pervertexNV)
            appendStr(" pervertexNV");
        if (qualifier.perPrimitiveNV)
            appendStr(" perprimitiveNV");
        if (qualifier.perViewNV)
            appendStr(" perviewNV");
        if (qualifier.perTaskNV)
            appendStr(" taskNV");
        if (qualifier.patch)
            appendStr(" patch");
        if (qualifier.sample)
            appendStr(" sample");
        if (qualifier.coherent)
            appendStr(" coherent");
        if (qualifier.devicecoherent)
            appendStr(" devicecoherent");
        if (qualifier.queuefamilycoherent)
            appendStr(" queuefamilycoherent");
        if (qualifier.workgroupcoherent)
            appendStr(" workgroupcoherent");
        if (qualifier.subgroupcoherent)
            appendStr(" subgroupcoherent");
        if (qualifier.shadercallcoherent)
            appendStr(" shadercallcoherent");
        if (qualifier.nonprivate)
            appendStr(" nonprivate");
        if (qualifier.volatil)
            appendStr(" volatile");
        if (qualifier.restrict)
            appendStr(" restrict");
        if (qualifier.readonly)
            appendStr(" readonly");
        if (qualifier.writeonly)
            appendStr(" writeonly");
        if (qualifier.specConstant)
            appendStr(" specialization-constant");
        if (qualifier.nonUniform)
            appendStr(" nonuniform");
        appendStr(" ");
        appendStr(getStorageQualifierString());
        if (isArray()) {
            for(int i = 0; i < (int)arraySizes->getNumDims(); ++i) {
                int size = arraySizes->getDimSize(i);
                if (size == UnsizedArraySize && i == 0 && arraySizes->isVariablyIndexed())
                    appendStr(" runtime-sized array of");
                else {
                    if (size == UnsizedArraySize) {
                        appendStr(" unsized");
                        if (i == 0) {
                            appendStr(" ");
                            appendInt(arraySizes->getImplicitSize());
                        }
                    } else {
                        appendStr(" ");
                        appendInt(arraySizes->getDimSize(i));
                    }
                    appendStr("-element array of");
                }
            }
        }
        if (isParameterized()) {
            appendStr("<");
            for(int i = 0; i < (int)typeParameters->getNumDims(); ++i) {
                appendInt(typeParameters->getDimSize(i));
                if (i != (int)typeParameters->getNumDims() - 1)
                    appendStr(", ");
            }
            appendStr(">");
        }
        if (qualifier.precision != EpqNone) {
            appendStr(" ");
            appendStr(getPrecisionQualifierString());
        }
        if (isMatrix()) {
            appendStr(" ");
            appendInt(matrixCols);
            appendStr("X");
            appendInt(matrixRows);
            appendStr(" matrix of");
        } else if (isVector()) {
            appendStr(" ");
            appendInt(vectorSize);
            appendStr("-component vector of");
        }

        appendStr(" ");
        typeString.append(getBasicTypeString());

        if (qualifier.builtIn != EbvNone) {
            appendStr(" ");
            appendStr(getBuiltInVariableString());
        }

        // Add struct/block members
        if (isStruct() && structure) {
            appendStr("{");
            bool hasHiddenMember = true;
            for (size_t i = 0; i < structure->size(); ++i) {
                if (! (*structure)[i].type->hiddenMember()) {
                    if (!hasHiddenMember) 
                        appendStr(", ");
                    typeString.append((*structure)[i].type->getCompleteString());
                    typeString.append(" ");
                    typeString.append((*structure)[i].type->getFieldName());
                    hasHiddenMember = false;
                }
            }
            appendStr("}");
        }

        return typeString;
    }

    TString getBasicTypeString() const
    {
        if (basicType == EbtSampler)
            return sampler.getString();
        else
            return getBasicString();
    }

    const char* getStorageQualifierString() const { return GetStorageQualifierString(qualifier.storage); }
    const char* getBuiltInVariableString() const { return GetBuiltInVariableString(qualifier.builtIn); }
    const char* getPrecisionQualifierString() const { return GetPrecisionQualifierString(qualifier.precision); }
#endif

    const TTypeList* getStruct() const { assert(isStruct()); return structure; }
    void setStruct(TTypeList* s) { assert(isStruct()); structure = s; }
    TTypeList* getWritableStruct() const { assert(isStruct()); return structure; }  // This should only be used when known to not be sharing with other threads
    void setBasicType(const TBasicType& t) { basicType = t; }
    
    int computeNumComponents() const
    {
        int components = 0;

        if (getBasicType() == EbtStruct || getBasicType() == EbtBlock) {
            for (TTypeList::const_iterator tl = getStruct()->begin(); tl != getStruct()->end(); tl++)
                components += ((*tl).type)->computeNumComponents();
        } else if (matrixCols)
            components = matrixCols * matrixRows;
        else
            components = vectorSize;

        if (arraySizes != nullptr) {
            components *= arraySizes->getCumulativeSize();
        }

        return components;
    }

    // append this type's mangled name to the passed in 'name'
    void appendMangledName(TString& name) const
    {
        buildMangledName(name);
        name += ';' ;
    }

    // Do two structure types match?  They could be declared independently,
    // in different places, but still might satisfy the definition of matching.
    // From the spec:
    //
    // "Structures must have the same name, sequence of type names, and
    //  type definitions, and member names to be considered the same type.
    //  This rule applies recursively for nested or embedded types."
    //
    bool sameStructType(const TType& right) const
    {
        // Most commonly, they are both nullptr, or the same pointer to the same actual structure
        if ((!isStruct() && !right.isStruct()) ||
            (isStruct() && right.isStruct() && structure == right.structure))
            return true;

        // Both being nullptr was caught above, now they both have to be structures of the same number of elements
        if (!isStruct() || !right.isStruct() ||
            structure->size() != right.structure->size())
            return false;

        // Structure names have to match
        if (*typeName != *right.typeName)
            return false;

        // Compare the names and types of all the members, which have to match
        for (unsigned int i = 0; i < structure->size(); ++i) {
            if ((*structure)[i].type->getFieldName() != (*right.structure)[i].type->getFieldName())
                return false;

            if (*(*structure)[i].type != *(*right.structure)[i].type)
                return false;
        }

        return true;
    }

     bool sameReferenceType(const TType& right) const
    {
        if (isReference() != right.isReference())
            return false;

        if (!isReference() && !right.isReference())<--- Condition '!isReference()' is always true
            return true;

        assert(referentType != nullptr);
        assert(right.referentType != nullptr);

        if (referentType == right.referentType)
            return true;

        return *referentType == *right.referentType;
    }

   // See if two types match, in all aspects except arrayness
    bool sameElementType(const TType& right) const
    {
        return basicType == right.basicType && sameElementShape(right);
    }

    // See if two type's arrayness match
    bool sameArrayness(const TType& right) const
    {
        return ((arraySizes == nullptr && right.arraySizes == nullptr) ||
                (arraySizes != nullptr && right.arraySizes != nullptr && *arraySizes == *right.arraySizes));
    }

    // See if two type's arrayness match in everything except their outer dimension
    bool sameInnerArrayness(const TType& right) const
    {
        assert(arraySizes != nullptr && right.arraySizes != nullptr);
        return arraySizes->sameInnerArrayness(*right.arraySizes);
    }

    // See if two type's parameters match
    bool sameTypeParameters(const TType& right) const
    {
        return ((typeParameters == nullptr && right.typeParameters == nullptr) ||
                (typeParameters != nullptr && right.typeParameters != nullptr && *typeParameters == *right.typeParameters));
    }

    // See if two type's elements match in all ways except basic type
    bool sameElementShape(const TType& right) const
    {
        return    sampler == right.sampler    &&
               vectorSize == right.vectorSize &&
               matrixCols == right.matrixCols &&
               matrixRows == right.matrixRows &&
                  vector1 == right.vector1    &&
              isCoopMat() == right.isCoopMat() &&
               sameStructType(right)          &&
               sameReferenceType(right);
    }

    // See if a cooperative matrix type parameter with unspecified parameters is
    // an OK function parameter
    bool coopMatParameterOK(const TType& right) const
    {
        return isCoopMat() && right.isCoopMat() && (getBasicType() == right.getBasicType()) &&
               typeParameters == nullptr && right.typeParameters != nullptr;
    }

    bool sameCoopMatBaseType(const TType &right) const {
        bool rv = coopmat && right.coopmat;<--- rv is initialized
        if (getBasicType() == EbtFloat || getBasicType() == EbtFloat16)
            rv = right.getBasicType() == EbtFloat || right.getBasicType() == EbtFloat16;<--- rv is overwritten
        else if (getBasicType() == EbtUint || getBasicType() == EbtUint8)
            rv = right.getBasicType() == EbtUint || right.getBasicType() == EbtUint8;
        else if (getBasicType() == EbtInt || getBasicType() == EbtInt8)
            rv = right.getBasicType() == EbtInt || right.getBasicType() == EbtInt8;
        else
            rv = false;
        return rv;
    }


    // See if two types match in all ways (just the actual type, not qualification)
    bool operator==(const TType& right) const
    {
        return sameElementType(right) && sameArrayness(right) && sameTypeParameters(right);
    }

    bool operator!=(const TType& right) const
    {
        return ! operator==(right);
    }

    unsigned int getBufferReferenceAlignment() const
    {
#ifndef GLSLANG_WEB
        if (getBasicType() == glslang::EbtReference) {
            return getReferentType()->getQualifier().hasBufferReferenceAlign() ?
                        (1u << getReferentType()->getQualifier().layoutBufferReferenceAlign) : 16u;
        }
#endif
        return 0;
    }

protected:
    // Require consumer to pick between deep copy and shallow copy.
    TType(const TType& type);
    TType& operator=(const TType& type);

    // Recursively copy a type graph, while preserving the graph-like
    // quality. That is, don't make more than one copy of a structure that
    // gets reused multiple times in the type graph.
    void deepCopy(const TType& copyOf, TMap<TTypeList*,TTypeList*>& copiedMap)
    {
        shallowCopy(copyOf);

        if (copyOf.arraySizes) {
            arraySizes = new TArraySizes;
            *arraySizes = *copyOf.arraySizes;
        }

        if (copyOf.typeParameters) {
            typeParameters = new TArraySizes;
            *typeParameters = *copyOf.typeParameters;
        }

        if (copyOf.isStruct() && copyOf.structure) {
            auto prevCopy = copiedMap.find(copyOf.structure);
            if (prevCopy != copiedMap.end())
                structure = prevCopy->second;
            else {
                structure = new TTypeList;
                copiedMap[copyOf.structure] = structure;
                for (unsigned int i = 0; i < copyOf.structure->size(); ++i) {
                    TTypeLoc typeLoc;
                    typeLoc.loc = (*copyOf.structure)[i].loc;
                    typeLoc.type = new TType();
                    typeLoc.type->deepCopy(*(*copyOf.structure)[i].type, copiedMap);
                    structure->push_back(typeLoc);
                }
            }
        }

        if (copyOf.fieldName)
            fieldName = NewPoolTString(copyOf.fieldName->c_str());
        if (copyOf.typeName)
            typeName = NewPoolTString(copyOf.typeName->c_str());
    }


    void buildMangledName(TString&) const;

    TBasicType basicType : 8;
    int vectorSize       : 4;  // 1 means either scalar or 1-component vector; see vector1 to disambiguate.
    int matrixCols       : 4;
    int matrixRows       : 4;
    bool vector1         : 1;  // Backward-compatible tracking of a 1-component vector distinguished from a scalar.
                               // GLSL 4.5 never has a 1-component vector; so this will always be false until such
                               // functionality is added.
                               // HLSL does have a 1-component vectors, so this will be true to disambiguate
                               // from a scalar.
    bool coopmat         : 1;
    TQualifier qualifier;

    TArraySizes* arraySizes;    // nullptr unless an array; can be shared across types
    // A type can't be both a structure (EbtStruct/EbtBlock) and a reference (EbtReference), so
    // conserve space by making these a union
    union {
        TTypeList* structure;       // invalid unless this is a struct; can be shared across types
        TType *referentType;        // invalid unless this is an EbtReference
    };
    TString *fieldName;         // for structure field names
    TString *typeName;          // for structure type name
    TSampler sampler;
    TArraySizes* typeParameters;// nullptr unless a parameterized type; can be shared across types
};

} // end namespace glslang

#endif // _TYPES_INCLUDED_