This file is indexed.

/usr/share/ada/adainclude/gnatprj/prj-dect.adb is in libgnatprj6-dev 6.4.0-17ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   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
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                              P R J . D E C T                             --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 2001-2015, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license.          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Err_Vars;    use Err_Vars;
with Opt;         use Opt;
with Prj.Attr;    use Prj.Attr;
with Prj.Attr.PM; use Prj.Attr.PM;
with Prj.Err;     use Prj.Err;
with Prj.Strt;    use Prj.Strt;
with Prj.Tree;    use Prj.Tree;
with Snames;
with Uintp;       use Uintp;

with GNAT;                  use GNAT;
with GNAT.Case_Util;        use GNAT.Case_Util;
with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;
with GNAT.Strings;

package body Prj.Dect is

   type Zone is (In_Project, In_Package, In_Case_Construction);
   --  Used to indicate if we are parsing a package (In_Package), a case
   --  construction (In_Case_Construction) or none of those two (In_Project).

   procedure Rename_Obsolescent_Attributes
     (In_Tree         : Project_Node_Tree_Ref;
      Attribute       : Project_Node_Id;
      Current_Package : Project_Node_Id);
   --  Rename obsolescent attributes in the tree. When the attribute has been
   --  renamed since its initial introduction in the design of projects, we
   --  replace the old name in the tree with the new name, so that the code
   --  does not have to check both names forever.

   procedure Check_Attribute_Allowed
     (In_Tree   : Project_Node_Tree_Ref;
      Project   : Project_Node_Id;
      Attribute : Project_Node_Id;
      Flags     : Processing_Flags);
   --  Check whether the attribute is valid in this project. In particular,
   --  depending on the type of project (qualifier), some attributes might
   --  be disabled.

   procedure Check_Package_Allowed
     (In_Tree         : Project_Node_Tree_Ref;
      Project         : Project_Node_Id;
      Current_Package : Project_Node_Id;
      Flags           : Processing_Flags);
   --  Check whether the package is valid in this project

   procedure Parse_Attribute_Declaration
     (In_Tree           : Project_Node_Tree_Ref;
      Attribute         : out Project_Node_Id;
      First_Attribute   : Attribute_Node_Id;
      Current_Project   : Project_Node_Id;
      Current_Package   : Project_Node_Id;
      Packages_To_Check : String_List_Access;
      Flags             : Processing_Flags);
   --  Parse an attribute declaration

   procedure Parse_Case_Construction
     (In_Tree           : Project_Node_Tree_Ref;
      Case_Construction : out Project_Node_Id;
      First_Attribute   : Attribute_Node_Id;
      Current_Project   : Project_Node_Id;
      Current_Package   : Project_Node_Id;
      Packages_To_Check : String_List_Access;
      Is_Config_File    : Boolean;
      Flags             : Processing_Flags);
   --  Parse a case construction

   procedure Parse_Declarative_Items
     (In_Tree           : Project_Node_Tree_Ref;
      Declarations      : out Project_Node_Id;
      In_Zone           : Zone;
      First_Attribute   : Attribute_Node_Id;
      Current_Project   : Project_Node_Id;
      Current_Package   : Project_Node_Id;
      Packages_To_Check : String_List_Access;
      Is_Config_File    : Boolean;
      Flags             : Processing_Flags);
   --  Parse declarative items. Depending on In_Zone, some declarative items
   --  may be forbidden. Is_Config_File should be set to True if the project
   --  represents a config file (.cgpr) since some specific checks apply.

   procedure Parse_Package_Declaration
     (In_Tree             : Project_Node_Tree_Ref;
      Package_Declaration : out Project_Node_Id;
      Current_Project     : Project_Node_Id;
      Packages_To_Check   : String_List_Access;
      Is_Config_File      : Boolean;
      Flags               : Processing_Flags);
   --  Parse a package declaration.
   --  Is_Config_File should be set to True if the project represents a config
   --  file (.cgpr) since some specific checks apply.

   procedure Parse_String_Type_Declaration
     (In_Tree         : Project_Node_Tree_Ref;
      String_Type     : out Project_Node_Id;
      Current_Project : Project_Node_Id;
      Flags           : Processing_Flags);
   --  type <name> is ( <literal_string> { , <literal_string> } ) ;

   procedure Parse_Variable_Declaration
     (In_Tree         : Project_Node_Tree_Ref;
      Variable        : out Project_Node_Id;
      Current_Project : Project_Node_Id;
      Current_Package : Project_Node_Id;
      Flags           : Processing_Flags);
   --  Parse a variable assignment
   --  <variable_Name> := <expression>; OR
   --  <variable_Name> : <string_type_Name> := <string_expression>;

   -----------
   -- Parse --
   -----------

   procedure Parse
     (In_Tree           : Project_Node_Tree_Ref;
      Declarations      : out Project_Node_Id;
      Current_Project   : Project_Node_Id;
      Extends           : Project_Node_Id;
      Packages_To_Check : String_List_Access;
      Is_Config_File    : Boolean;
      Flags             : Processing_Flags)
   is
      First_Declarative_Item : Project_Node_Id := Empty_Node;

   begin
      Declarations :=
        Default_Project_Node
          (Of_Kind => N_Project_Declaration, In_Tree => In_Tree);
      Set_Location_Of (Declarations, In_Tree, To => Token_Ptr);
      Set_Extended_Project_Of (Declarations, In_Tree, To => Extends);
      Set_Project_Declaration_Of (Current_Project, In_Tree, Declarations);
      Parse_Declarative_Items
        (Declarations      => First_Declarative_Item,
         In_Tree           => In_Tree,
         In_Zone           => In_Project,
         First_Attribute   => Prj.Attr.Attribute_First,
         Current_Project   => Current_Project,
         Current_Package   => Empty_Node,
         Packages_To_Check => Packages_To_Check,
         Is_Config_File    => Is_Config_File,
         Flags             => Flags);
      Set_First_Declarative_Item_Of
        (Declarations, In_Tree, To => First_Declarative_Item);
   end Parse;

   -----------------------------------
   -- Rename_Obsolescent_Attributes --
   -----------------------------------

   procedure Rename_Obsolescent_Attributes
     (In_Tree         : Project_Node_Tree_Ref;
      Attribute       : Project_Node_Id;
      Current_Package : Project_Node_Id)
   is
   begin
      if Present (Current_Package)
        and then Expression_Kind_Of (Current_Package, In_Tree) /= Ignored
      then
         case Name_Of (Attribute, In_Tree) is
            when Snames.Name_Specification =>
               Set_Name_Of (Attribute, In_Tree, To => Snames.Name_Spec);

            when Snames.Name_Specification_Suffix =>
               Set_Name_Of (Attribute, In_Tree, To => Snames.Name_Spec_Suffix);

            when Snames.Name_Implementation =>
               Set_Name_Of (Attribute, In_Tree, To => Snames.Name_Body);

            when Snames.Name_Implementation_Suffix =>
               Set_Name_Of (Attribute, In_Tree, To => Snames.Name_Body_Suffix);

            when others =>
               null;
         end case;
      end if;
   end Rename_Obsolescent_Attributes;

   ---------------------------
   -- Check_Package_Allowed --
   ---------------------------

   procedure Check_Package_Allowed
     (In_Tree         : Project_Node_Tree_Ref;
      Project         : Project_Node_Id;
      Current_Package : Project_Node_Id;
      Flags           : Processing_Flags)
   is
      Qualif : constant Project_Qualifier :=
                 Project_Qualifier_Of (Project, In_Tree);
      Name   : constant Name_Id := Name_Of (Current_Package, In_Tree);
   begin
      if Name /= Snames.Name_Ide
        and then
          ((Qualif = Aggregate         and then Name /= Snames.Name_Builder)
              or else
           (Qualif = Aggregate_Library and then Name /= Snames.Name_Builder
                                       and then Name /= Snames.Name_Install))
      then
         Error_Msg_Name_1 := Name;
         Error_Msg
           (Flags,
            "package %% is forbidden in aggregate projects",
            Location_Of (Current_Package, In_Tree));
      end if;
   end Check_Package_Allowed;

   -----------------------------
   -- Check_Attribute_Allowed --
   -----------------------------

   procedure Check_Attribute_Allowed
     (In_Tree   : Project_Node_Tree_Ref;
      Project   : Project_Node_Id;
      Attribute : Project_Node_Id;
      Flags     : Processing_Flags)
   is
      Qualif : constant Project_Qualifier :=
                 Project_Qualifier_Of (Project, In_Tree);
      Name   : constant Name_Id := Name_Of (Attribute, In_Tree);

   begin
      case Qualif is
         when Aggregate | Aggregate_Library =>
            if        Name = Snames.Name_Languages
              or else Name = Snames.Name_Source_Files
              or else Name = Snames.Name_Source_List_File
              or else Name = Snames.Name_Locally_Removed_Files
              or else Name = Snames.Name_Excluded_Source_Files
              or else Name = Snames.Name_Excluded_Source_List_File
              or else Name = Snames.Name_Interfaces
              or else Name = Snames.Name_Object_Dir
              or else Name = Snames.Name_Exec_Dir
              or else Name = Snames.Name_Source_Dirs
              or else Name = Snames.Name_Inherit_Source_Path
              or else
                (Qualif = Aggregate and then Name = Snames.Name_Library_Dir)
              or else
                (Qualif = Aggregate and then Name = Snames.Name_Library_Name)
              or else Name = Snames.Name_Main
              or else Name = Snames.Name_Roots
              or else Name = Snames.Name_Externally_Built
              or else Name = Snames.Name_Executable
              or else Name = Snames.Name_Executable_Suffix
              or else Name = Snames.Name_Default_Switches
            then
               Error_Msg_Name_1 := Name;
               Error_Msg
                 (Flags,
                  "%% is not valid in aggregate projects",
                  Location_Of (Attribute, In_Tree));
            end if;

         when others =>
            if Name = Snames.Name_Project_Files
              or else Name = Snames.Name_Project_Path
              or else Name = Snames.Name_External
            then
               Error_Msg_Name_1 := Name;
               Error_Msg
                 (Flags,
                  "%% is only valid in aggregate projects",
                  Location_Of (Attribute, In_Tree));
            end if;
      end case;
   end Check_Attribute_Allowed;

   ---------------------------------
   -- Parse_Attribute_Declaration --
   ---------------------------------

   procedure Parse_Attribute_Declaration
     (In_Tree           : Project_Node_Tree_Ref;
      Attribute         : out Project_Node_Id;
      First_Attribute   : Attribute_Node_Id;
      Current_Project   : Project_Node_Id;
      Current_Package   : Project_Node_Id;
      Packages_To_Check : String_List_Access;
      Flags             : Processing_Flags)
   is
      Current_Attribute      : Attribute_Node_Id := First_Attribute;
      Full_Associative_Array : Boolean           := False;
      Attribute_Name         : Name_Id           := No_Name;
      Optional_Index         : Boolean           := False;
      Pkg_Id                 : Package_Node_Id   := Empty_Package;

      procedure Process_Attribute_Name;
      --  Read the name of the attribute, and check its type

      procedure Process_Associative_Array_Index;
      --  Read the index of the associative array and check its validity

      ----------------------------
      -- Process_Attribute_Name --
      ----------------------------

      procedure Process_Attribute_Name is
         Ignore : Boolean;

      begin
         Attribute_Name := Token_Name;
         Set_Name_Of (Attribute, In_Tree, To => Attribute_Name);
         Set_Location_Of (Attribute, In_Tree, To => Token_Ptr);

         --  Find the attribute

         Current_Attribute :=
           Attribute_Node_Id_Of (Attribute_Name, First_Attribute);

         --  If the attribute cannot be found, create the attribute if inside
         --  an unknown package.

         if Current_Attribute = Empty_Attribute then
            if Present (Current_Package)
              and then Expression_Kind_Of (Current_Package, In_Tree) = Ignored
            then
               Pkg_Id := Package_Id_Of (Current_Package, In_Tree);
               Add_Attribute (Pkg_Id, Token_Name, Current_Attribute);

            else
               --  If not a valid attribute name, issue an error if inside
               --  a package that need to be checked.

               Ignore := Present (Current_Package) and then
                          Packages_To_Check /= All_Packages;

               if Ignore then

                  --  Check that we are not in a package to check

                  Get_Name_String (Name_Of (Current_Package, In_Tree));

                  for Index in Packages_To_Check'Range loop
                     if Name_Buffer (1 .. Name_Len) =
                       Packages_To_Check (Index).all
                     then
                        Ignore := False;
                        exit;
                     end if;
                  end loop;
               end if;

               if not Ignore then
                  Error_Msg_Name_1 := Token_Name;
                  Error_Msg (Flags, "undefined attribute %%", Token_Ptr);
               end if;
            end if;

         --  Set, if appropriate the index case insensitivity flag

         else
            if Is_Read_Only (Current_Attribute) then
               Error_Msg_Name_1 := Token_Name;
               Error_Msg
                 (Flags, "read-only attribute %% cannot be given a value",
                  Token_Ptr);
            end if;

            if Attribute_Kind_Of (Current_Attribute) in
                 All_Case_Insensitive_Associative_Array
            then
               Set_Case_Insensitive (Attribute, In_Tree, To => True);
            end if;
         end if;

         Scan (In_Tree); --  past the attribute name

         --  Set the expression kind of the attribute

         if Current_Attribute /= Empty_Attribute then
            Set_Expression_Kind_Of
              (Attribute, In_Tree, To => Variable_Kind_Of (Current_Attribute));
            Optional_Index := Optional_Index_Of (Current_Attribute);
         end if;
      end Process_Attribute_Name;

      -------------------------------------
      -- Process_Associative_Array_Index --
      -------------------------------------

      procedure Process_Associative_Array_Index is
      begin
         --  If the attribute is not an associative array attribute, report
         --  an error. If this information is still unknown, set the kind
         --  to Associative_Array.

         if Current_Attribute /= Empty_Attribute
           and then Attribute_Kind_Of (Current_Attribute) = Single
         then
            Error_Msg (Flags,
                       "the attribute """ &
                       Get_Name_String (Attribute_Name_Of (Current_Attribute))
                       & """ cannot be an associative array",
                       Location_Of (Attribute, In_Tree));

         elsif Attribute_Kind_Of (Current_Attribute) = Unknown then
            Set_Attribute_Kind_Of (Current_Attribute, To => Associative_Array);
         end if;

         Scan (In_Tree); --  past the left parenthesis

         if Others_Allowed_For (Current_Attribute)
           and then Token = Tok_Others
         then
            Set_Associative_Array_Index_Of
              (Attribute, In_Tree, All_Other_Names);
            Scan (In_Tree); --  past others

         else
            if Others_Allowed_For (Current_Attribute) then
               Expect (Tok_String_Literal, "literal string or others");
            else
               Expect (Tok_String_Literal, "literal string");
            end if;

            if Token = Tok_String_Literal then
               Get_Name_String (Token_Name);

               if Case_Insensitive (Attribute, In_Tree) then
                  To_Lower (Name_Buffer (1 .. Name_Len));
               end if;

               Set_Associative_Array_Index_Of (Attribute, In_Tree, Name_Find);
               Scan (In_Tree); --  past the literal string index

               if Token = Tok_At then
                  case Attribute_Kind_Of (Current_Attribute) is
                  when Optional_Index_Associative_Array |
                       Optional_Index_Case_Insensitive_Associative_Array =>
                     Scan (In_Tree);
                     Expect (Tok_Integer_Literal, "integer literal");

                     if Token = Tok_Integer_Literal then

                        --  Set the source index value from given literal

                        declare
                           Index : constant Int :=
                                     UI_To_Int (Int_Literal_Value);
                        begin
                           if Index = 0 then
                              Error_Msg
                                (Flags, "index cannot be zero", Token_Ptr);
                           else
                              Set_Source_Index_Of
                                (Attribute, In_Tree, To => Index);
                           end if;
                        end;

                        Scan (In_Tree);
                     end if;

                  when others =>
                     Error_Msg (Flags, "index not allowed here", Token_Ptr);
                     Scan (In_Tree);

                     if Token = Tok_Integer_Literal then
                        Scan (In_Tree);
                     end if;
                  end case;
               end if;
            end if;
         end if;

         Expect (Tok_Right_Paren, "`)`");

         if Token = Tok_Right_Paren then
            Scan (In_Tree); --  past the right parenthesis
         end if;
      end Process_Associative_Array_Index;

   begin
      Attribute :=
        Default_Project_Node
          (Of_Kind => N_Attribute_Declaration, In_Tree => In_Tree);
      Set_Location_Of (Attribute, In_Tree, To => Token_Ptr);
      Set_Previous_Line_Node (Attribute);

      --  Scan past "for"

      Scan (In_Tree);

      --  Body or External may be an attribute name

      if Token = Tok_Body then
         Token := Tok_Identifier;
         Token_Name := Snames.Name_Body;
      end if;

      if Token = Tok_External then
         Token := Tok_Identifier;
         Token_Name := Snames.Name_External;
      end if;

      Expect (Tok_Identifier, "identifier");
      Process_Attribute_Name;
      Rename_Obsolescent_Attributes (In_Tree, Attribute, Current_Package);
      Check_Attribute_Allowed (In_Tree, Current_Project, Attribute, Flags);

      --  Associative array attributes

      if Token = Tok_Left_Paren then
         Process_Associative_Array_Index;

      else
         --  If it is an associative array attribute and there are no left
         --  parenthesis, then this is a full associative array declaration.
         --  Flag it as such for later processing of its value.

         if Current_Attribute /= Empty_Attribute
           and then
             Attribute_Kind_Of (Current_Attribute) /= Single
         then
            if Attribute_Kind_Of (Current_Attribute) = Unknown then
               Set_Attribute_Kind_Of (Current_Attribute, To => Single);

            else
               Full_Associative_Array := True;
            end if;
         end if;
      end if;

      Expect (Tok_Use, "USE");

      if Token = Tok_Use then
         Scan (In_Tree);

         if Full_Associative_Array then

            --  Expect <project>'<same_attribute_name>, or
            --  <project>.<same_package_name>'<same_attribute_name>

            declare
               The_Project : Project_Node_Id := Empty_Node;
               --  The node of the project where the associative array is
               --  declared.

               The_Package : Project_Node_Id := Empty_Node;
               --  The node of the package where the associative array is
               --  declared, if any.

               Project_Name : Name_Id := No_Name;
               --  The name of the project where the associative array is
               --  declared.

               Location : Source_Ptr := No_Location;
               --  The location of the project name

            begin
               Expect (Tok_Identifier, "identifier");

               if Token = Tok_Identifier then
                  Location := Token_Ptr;

                  --  Find the project node in the imported project or
                  --  in the project being extended.

                  The_Project := Imported_Or_Extended_Project_Of
                                   (Current_Project, In_Tree, Token_Name);

                  if No (The_Project) and then not In_Tree.Incomplete_With then
                     Error_Msg (Flags, "unknown project", Location);
                     Scan (In_Tree); --  past the project name

                  else
                     Project_Name := Token_Name;
                     Scan (In_Tree); --  past the project name

                     --  If this is inside a package, a dot followed by the
                     --  name of the package must followed the project name.

                     if Present (Current_Package) then
                        Expect (Tok_Dot, "`.`");

                        if Token /= Tok_Dot then
                           The_Project := Empty_Node;

                        else
                           Scan (In_Tree); --  past the dot
                           Expect (Tok_Identifier, "identifier");

                           if Token /= Tok_Identifier then
                              The_Project := Empty_Node;

                           --  If it is not the same package name, issue error

                           elsif
                             Token_Name /= Name_Of (Current_Package, In_Tree)
                           then
                              The_Project := Empty_Node;
                              Error_Msg
                                (Flags, "not the same package as " &
                                 Get_Name_String
                                   (Name_Of (Current_Package, In_Tree)),
                                 Token_Ptr);
                              Scan (In_Tree); --  past the package name

                           else
                              if Present (The_Project) then
                                 The_Package :=
                                   First_Package_Of (The_Project, In_Tree);

                                 --  Look for the package node

                                 while Present (The_Package)
                                   and then Name_Of (The_Package, In_Tree) /=
                                                                    Token_Name
                                 loop
                                    The_Package :=
                                      Next_Package_In_Project
                                        (The_Package, In_Tree);
                                 end loop;

                                 --  If the package cannot be found in the
                                 --  project, issue an error.

                                 if No (The_Package) then
                                    The_Project := Empty_Node;
                                    Error_Msg_Name_2 := Project_Name;
                                    Error_Msg_Name_1 := Token_Name;
                                    Error_Msg
                                      (Flags,
                                       "package % not declared in project %",
                                       Token_Ptr);
                                 end if;
                              end if;

                              Scan (In_Tree); --  past the package name
                           end if;
                        end if;
                     end if;
                  end if;
               end if;

               if Present (The_Project) or else In_Tree.Incomplete_With then

                  --  Looking for '<same attribute name>

                  Expect (Tok_Apostrophe, "`''`");

                  if Token /= Tok_Apostrophe then
                     The_Project := Empty_Node;

                  else
                     Scan (In_Tree); --  past the apostrophe
                     Expect (Tok_Identifier, "identifier");

                     if Token /= Tok_Identifier then
                        The_Project := Empty_Node;

                     else
                        --  If it is not the same attribute name, issue error

                        if Token_Name /= Attribute_Name then
                           The_Project := Empty_Node;
                           Error_Msg_Name_1 := Attribute_Name;
                           Error_Msg
                             (Flags, "invalid name, should be %", Token_Ptr);
                        end if;

                        Scan (In_Tree); --  past the attribute name
                     end if;
                  end if;
               end if;

               if No (The_Project) then

                  --  If there were any problem, set the attribute id to null,
                  --  so that the node will not be recorded.

                  Current_Attribute := Empty_Attribute;

               else
                  --  Set the appropriate field in the node.
                  --  Note that the index and the expression are nil. This
                  --  characterizes full associative array attribute
                  --  declarations.

                  Set_Associative_Project_Of (Attribute, In_Tree, The_Project);
                  Set_Associative_Package_Of (Attribute, In_Tree, The_Package);
               end if;
            end;

         --  Other attribute declarations (not full associative array)

         else
            declare
               Expression_Location : constant Source_Ptr := Token_Ptr;
               --  The location of the first token of the expression

               Expression          : Project_Node_Id     := Empty_Node;
               --  The expression, value for the attribute declaration

            begin
               --  Get the expression value and set it in the attribute node

               Parse_Expression
                 (In_Tree         => In_Tree,
                  Expression      => Expression,
                  Flags           => Flags,
                  Current_Project => Current_Project,
                  Current_Package => Current_Package,
                  Optional_Index  => Optional_Index);
               Set_Expression_Of (Attribute, In_Tree, To => Expression);

               --  If the expression is legal, but not of the right kind
               --  for the attribute, issue an error.

               if Current_Attribute /= Empty_Attribute
                 and then Present (Expression)
                 and then Variable_Kind_Of (Current_Attribute) /=
                 Expression_Kind_Of (Expression, In_Tree)
               then
                  if Variable_Kind_Of (Current_Attribute) = Undefined then
                     Set_Variable_Kind_Of
                       (Current_Attribute,
                        To => Expression_Kind_Of (Expression, In_Tree));

                  else
                     Error_Msg
                       (Flags, "wrong expression kind for attribute """ &
                        Get_Name_String
                          (Attribute_Name_Of (Current_Attribute)) &
                        """",
                        Expression_Location);
                  end if;
               end if;
            end;
         end if;
      end if;

      --  If the attribute was not recognized, return an empty node.
      --  It may be that it is not in a package to check, and the node will
      --  not be added to the tree.

      if Current_Attribute = Empty_Attribute then
         Attribute := Empty_Node;
      end if;

      Set_End_Of_Line (Attribute);
      Set_Previous_Line_Node (Attribute);
   end Parse_Attribute_Declaration;

   -----------------------------
   -- Parse_Case_Construction --
   -----------------------------

   procedure Parse_Case_Construction
     (In_Tree           : Project_Node_Tree_Ref;
      Case_Construction : out Project_Node_Id;
      First_Attribute   : Attribute_Node_Id;
      Current_Project   : Project_Node_Id;
      Current_Package   : Project_Node_Id;
      Packages_To_Check : String_List_Access;
      Is_Config_File    : Boolean;
      Flags             : Processing_Flags)
   is
      Current_Item    : Project_Node_Id := Empty_Node;
      Next_Item       : Project_Node_Id := Empty_Node;
      First_Case_Item : Boolean := True;

      Variable_Location : Source_Ptr := No_Location;

      String_Type : Project_Node_Id := Empty_Node;

      Case_Variable : Project_Node_Id := Empty_Node;

      First_Declarative_Item : Project_Node_Id := Empty_Node;

      First_Choice           : Project_Node_Id := Empty_Node;

      When_Others            : Boolean := False;
      --  Set to True when there is a "when others =>" clause

   begin
      Case_Construction  :=
        Default_Project_Node
          (Of_Kind => N_Case_Construction, In_Tree => In_Tree);
      Set_Location_Of (Case_Construction, In_Tree, To => Token_Ptr);

      --  Scan past "case"

      Scan (In_Tree);

      --  Get the switch variable

      Expect (Tok_Identifier, "identifier");

      if Token = Tok_Identifier then
         Variable_Location := Token_Ptr;
         Parse_Variable_Reference
           (In_Tree         => In_Tree,
            Variable        => Case_Variable,
            Flags           => Flags,
            Current_Project => Current_Project,
            Current_Package => Current_Package);
         Set_Case_Variable_Reference_Of
           (Case_Construction, In_Tree, To => Case_Variable);

      else
         if Token /= Tok_Is then
            Scan (In_Tree);
         end if;
      end if;

      if Present (Case_Variable) then
         String_Type := String_Type_Of (Case_Variable, In_Tree);

         if Expression_Kind_Of (Case_Variable, In_Tree) /= Single then
            Error_Msg (Flags,
                       "variable """ &
                       Get_Name_String (Name_Of (Case_Variable, In_Tree)) &
                       """ is not a single string",
                       Variable_Location);
         end if;
      end if;

      Expect (Tok_Is, "IS");

      if Token = Tok_Is then
         Set_End_Of_Line (Case_Construction);
         Set_Previous_Line_Node (Case_Construction);
         Set_Next_End_Node (Case_Construction);

         --  Scan past "is"

         Scan (In_Tree);
      end if;

      Start_New_Case_Construction (In_Tree, String_Type);

      When_Loop :

      while Token = Tok_When loop

         if First_Case_Item then
            Current_Item :=
              Default_Project_Node
                (Of_Kind => N_Case_Item, In_Tree => In_Tree);
            Set_First_Case_Item_Of
              (Case_Construction, In_Tree, To => Current_Item);
            First_Case_Item := False;

         else
            Next_Item :=
              Default_Project_Node
                (Of_Kind => N_Case_Item, In_Tree => In_Tree);
            Set_Next_Case_Item (Current_Item, In_Tree, To => Next_Item);
            Current_Item := Next_Item;
         end if;

         Set_Location_Of (Current_Item, In_Tree, To => Token_Ptr);

         --  Scan past "when"

         Scan (In_Tree);

         if Token = Tok_Others then
            When_Others := True;

            --  Scan past "others"

            Scan (In_Tree);

            Expect (Tok_Arrow, "`=>`");
            Set_End_Of_Line (Current_Item);
            Set_Previous_Line_Node (Current_Item);

            --  Empty_Node in Field1 of a Case_Item indicates
            --  the "when others =>" branch.

            Set_First_Choice_Of (Current_Item, In_Tree, To => Empty_Node);

            Parse_Declarative_Items
              (In_Tree           => In_Tree,
               Declarations      => First_Declarative_Item,
               In_Zone           => In_Case_Construction,
               First_Attribute   => First_Attribute,
               Current_Project   => Current_Project,
               Current_Package   => Current_Package,
               Packages_To_Check => Packages_To_Check,
               Is_Config_File    => Is_Config_File,
               Flags             => Flags);

            --  "when others =>" must be the last branch, so save the
            --  Case_Item and exit

            Set_First_Declarative_Item_Of
              (Current_Item, In_Tree, To => First_Declarative_Item);
            exit When_Loop;

         else
            Parse_Choice_List
              (In_Tree      => In_Tree,
               First_Choice => First_Choice,
               Flags        => Flags,
               String_Type  => Present (String_Type));
            Set_First_Choice_Of (Current_Item, In_Tree, To => First_Choice);

            Expect (Tok_Arrow, "`=>`");
            Set_End_Of_Line (Current_Item);
            Set_Previous_Line_Node (Current_Item);

            Parse_Declarative_Items
              (In_Tree           => In_Tree,
               Declarations      => First_Declarative_Item,
               In_Zone           => In_Case_Construction,
               First_Attribute   => First_Attribute,
               Current_Project   => Current_Project,
               Current_Package   => Current_Package,
               Packages_To_Check => Packages_To_Check,
               Is_Config_File    => Is_Config_File,
               Flags             => Flags);

            Set_First_Declarative_Item_Of
              (Current_Item, In_Tree, To => First_Declarative_Item);

         end if;
      end loop When_Loop;

      End_Case_Construction
        (Check_All_Labels => not When_Others and not Quiet_Output,
         Case_Location    => Location_Of (Case_Construction, In_Tree),
         Flags            => Flags,
         String_Type      => Present (String_Type));

      Expect (Tok_End, "`END CASE`");
      Remove_Next_End_Node;

      if Token = Tok_End then

         --  Scan past "end"

         Scan (In_Tree);

         Expect (Tok_Case, "CASE");

      end if;

      --  Scan past "case"

      Scan (In_Tree);

      Expect (Tok_Semicolon, "`;`");
      Set_Previous_End_Node (Case_Construction);

   end Parse_Case_Construction;

   -----------------------------
   -- Parse_Declarative_Items --
   -----------------------------

   procedure Parse_Declarative_Items
     (In_Tree           : Project_Node_Tree_Ref;
      Declarations      : out Project_Node_Id;
      In_Zone           : Zone;
      First_Attribute   : Attribute_Node_Id;
      Current_Project   : Project_Node_Id;
      Current_Package   : Project_Node_Id;
      Packages_To_Check : String_List_Access;
      Is_Config_File    : Boolean;
      Flags             : Processing_Flags)
   is
      Current_Declarative_Item : Project_Node_Id := Empty_Node;
      Next_Declarative_Item    : Project_Node_Id := Empty_Node;
      Current_Declaration      : Project_Node_Id := Empty_Node;
      Item_Location            : Source_Ptr      := No_Location;

   begin
      Declarations := Empty_Node;

      loop
         --  We are always positioned at the token that precedes the first
         --  token of the declarative element. Scan past it.

         Scan (In_Tree);

         Item_Location := Token_Ptr;

         case Token is
            when Tok_Identifier =>

               if In_Zone = In_Case_Construction then

                  --  Check if the variable has already been declared

                  declare
                     The_Variable : Project_Node_Id := Empty_Node;

                  begin
                     if Present (Current_Package) then
                        The_Variable :=
                          First_Variable_Of (Current_Package, In_Tree);
                     elsif Present (Current_Project) then
                        The_Variable :=
                          First_Variable_Of (Current_Project, In_Tree);
                     end if;

                     while Present (The_Variable)
                       and then Name_Of (The_Variable, In_Tree) /=
                                Token_Name
                     loop
                        The_Variable := Next_Variable (The_Variable, In_Tree);
                     end loop;

                     --  It is an error to declare a variable in a case
                     --  construction for the first time.

                     if No (The_Variable) then
                        Error_Msg
                          (Flags,
                           "a variable cannot be declared " &
                           "for the first time here",
                           Token_Ptr);
                     end if;
                  end;
               end if;

               Parse_Variable_Declaration
                 (In_Tree,
                  Current_Declaration,
                  Current_Project => Current_Project,
                  Current_Package => Current_Package,
                  Flags           => Flags);

               Set_End_Of_Line (Current_Declaration);
               Set_Previous_Line_Node (Current_Declaration);

            when Tok_For =>

               Parse_Attribute_Declaration
                 (In_Tree           => In_Tree,
                  Attribute         => Current_Declaration,
                  First_Attribute   => First_Attribute,
                  Current_Project   => Current_Project,
                  Current_Package   => Current_Package,
                  Packages_To_Check => Packages_To_Check,
                  Flags             => Flags);

               Set_End_Of_Line (Current_Declaration);
               Set_Previous_Line_Node (Current_Declaration);

            when Tok_Null =>

               Scan (In_Tree); --  past "null"

            when Tok_Package =>

               --  Package declaration

               if In_Zone /= In_Project then
                  Error_Msg
                    (Flags, "a package cannot be declared here", Token_Ptr);
               end if;

               Parse_Package_Declaration
                 (In_Tree             => In_Tree,
                  Package_Declaration => Current_Declaration,
                  Current_Project     => Current_Project,
                  Packages_To_Check   => Packages_To_Check,
                  Is_Config_File      => Is_Config_File,
                  Flags               => Flags);

               Set_Previous_End_Node (Current_Declaration);

            when Tok_Type =>

               --  Type String Declaration

               if In_Zone /= In_Project then
                  Error_Msg (Flags,
                             "a string type cannot be declared here",
                             Token_Ptr);
               end if;

               Parse_String_Type_Declaration
                 (In_Tree         => In_Tree,
                  String_Type     => Current_Declaration,
                  Current_Project => Current_Project,
                  Flags           => Flags);

               Set_End_Of_Line (Current_Declaration);
               Set_Previous_Line_Node (Current_Declaration);

            when Tok_Case =>

               --  Case construction

               Parse_Case_Construction
                 (In_Tree           => In_Tree,
                  Case_Construction => Current_Declaration,
                  First_Attribute   => First_Attribute,
                  Current_Project   => Current_Project,
                  Current_Package   => Current_Package,
                  Packages_To_Check => Packages_To_Check,
                  Is_Config_File    => Is_Config_File,
                  Flags             => Flags);

               Set_Previous_End_Node (Current_Declaration);

            when others =>
               exit;

               --  We are leaving Parse_Declarative_Items positioned
               --  at the first token after the list of declarative items.
               --  It could be "end" (for a project, a package declaration or
               --  a case construction) or "when" (for a case construction)

         end case;

         Expect (Tok_Semicolon, "`;` after declarative items");

         --  Insert an N_Declarative_Item in the tree, but only if
         --  Current_Declaration is not an empty node.

         if Present (Current_Declaration) then
            if No (Current_Declarative_Item) then
               Current_Declarative_Item :=
                 Default_Project_Node
                   (Of_Kind => N_Declarative_Item, In_Tree => In_Tree);
               Declarations  := Current_Declarative_Item;

            else
               Next_Declarative_Item :=
                 Default_Project_Node
                   (Of_Kind => N_Declarative_Item, In_Tree => In_Tree);
               Set_Next_Declarative_Item
                 (Current_Declarative_Item, In_Tree,
                  To => Next_Declarative_Item);
               Current_Declarative_Item := Next_Declarative_Item;
            end if;

            Set_Current_Item_Node
              (Current_Declarative_Item, In_Tree,
               To => Current_Declaration);
            Set_Location_Of
              (Current_Declarative_Item, In_Tree, To => Item_Location);
         end if;
      end loop;
   end Parse_Declarative_Items;

   -------------------------------
   -- Parse_Package_Declaration --
   -------------------------------

   procedure Parse_Package_Declaration
     (In_Tree             : Project_Node_Tree_Ref;
      Package_Declaration : out Project_Node_Id;
      Current_Project     : Project_Node_Id;
      Packages_To_Check   : String_List_Access;
      Is_Config_File      : Boolean;
      Flags               : Processing_Flags)
   is
      First_Attribute        : Attribute_Node_Id := Empty_Attribute;
      Current_Package        : Package_Node_Id   := Empty_Package;
      First_Declarative_Item : Project_Node_Id   := Empty_Node;
      Package_Location       : constant Source_Ptr := Token_Ptr;
      Renaming               : Boolean := False;
      Extending              : Boolean := False;

   begin
      Package_Declaration :=
        Default_Project_Node
          (Of_Kind => N_Package_Declaration, In_Tree => In_Tree);
      Set_Location_Of (Package_Declaration, In_Tree, To => Package_Location);

      --  Scan past "package"

      Scan (In_Tree);
      Expect (Tok_Identifier, "identifier");

      if Token = Tok_Identifier then
         Set_Name_Of (Package_Declaration, In_Tree, To => Token_Name);

         Current_Package := Package_Node_Id_Of (Token_Name);

         if Current_Package = Empty_Package then
            if not Quiet_Output then
               declare
                  List  : constant Strings.String_List := Package_Name_List;
                  Index : Natural;
                  Name  : constant String := Get_Name_String (Token_Name);

               begin
                  --  Check for possible misspelling of a known package name

                  Index := 0;
                  loop
                     if Index >= List'Last then
                        Index := 0;
                        exit;
                     end if;

                     Index := Index + 1;
                     exit when
                       GNAT.Spelling_Checker.Is_Bad_Spelling_Of
                         (Name, List (Index).all);
                  end loop;

                  --  Issue warning(s) in verbose mode or when a possible
                  --  misspelling has been found.

                  if Verbose_Mode or else Index /= 0 then
                     Error_Msg (Flags,
                                "?""" &
                                Get_Name_String
                                 (Name_Of (Package_Declaration, In_Tree)) &
                                """ is not a known package name",
                                Token_Ptr);
                  end if;

                  if Index /= 0 then
                     Error_Msg -- CODEFIX
                       (Flags,
                        "\?possible misspelling of """ &
                        List (Index).all & """", Token_Ptr);
                  end if;
               end;
            end if;

            --  Set the package declaration to "ignored" so that it is not
            --  processed by Prj.Proc.Process.

            Set_Expression_Kind_Of (Package_Declaration, In_Tree, Ignored);

            --  Add the unknown package in the list of packages

            Add_Unknown_Package (Token_Name, Current_Package);

         elsif Current_Package = Unknown_Package then

            --  Set the package declaration to "ignored" so that it is not
            --  processed by Prj.Proc.Process.

            Set_Expression_Kind_Of (Package_Declaration, In_Tree, Ignored);

         else
            First_Attribute := First_Attribute_Of (Current_Package);
         end if;

         Set_Package_Id_Of
           (Package_Declaration, In_Tree, To => Current_Package);

         declare
            Current : Project_Node_Id :=
                        First_Package_Of (Current_Project, In_Tree);

         begin
            while Present (Current)
              and then Name_Of (Current, In_Tree) /= Token_Name
            loop
               Current := Next_Package_In_Project (Current, In_Tree);
            end loop;

            if Present (Current) then
               Error_Msg
                 (Flags,
                  "package """ &
                  Get_Name_String (Name_Of (Package_Declaration, In_Tree)) &
                  """ is declared twice in the same project",
                  Token_Ptr);

            else
               --  Add the package to the project list

               Set_Next_Package_In_Project
                 (Package_Declaration, In_Tree,
                  To => First_Package_Of (Current_Project, In_Tree));
               Set_First_Package_Of
                 (Current_Project, In_Tree, To => Package_Declaration);
            end if;
         end;

         --  Scan past the package name

         Scan (In_Tree);
      end if;

      Check_Package_Allowed
        (In_Tree, Current_Project, Package_Declaration, Flags);

      if Token = Tok_Renames then
         Renaming := True;
      elsif Token = Tok_Extends then
         Extending := True;
      end if;

      if Renaming or else Extending then
         if Is_Config_File then
            Error_Msg
              (Flags,
               "no package rename or extension in configuration projects",
               Token_Ptr);
         end if;

         --  Scan past "renames" or "extends"

         Scan (In_Tree);

         Expect (Tok_Identifier, "identifier");

         if Token = Tok_Identifier then
            declare
               Project_Name : constant Name_Id := Token_Name;

               Clause       : Project_Node_Id :=
                              First_With_Clause_Of (Current_Project, In_Tree);
               The_Project  : Project_Node_Id := Empty_Node;
               Extended     : constant Project_Node_Id :=
                                Extended_Project_Of
                                  (Project_Declaration_Of
                                    (Current_Project, In_Tree),
                                   In_Tree);
            begin
               while Present (Clause) loop
                  --  Only non limited imported projects may be used in a
                  --  renames declaration.

                  The_Project :=
                    Non_Limited_Project_Node_Of (Clause, In_Tree);
                  exit when Present (The_Project)
                    and then Name_Of (The_Project, In_Tree) = Project_Name;
                  Clause := Next_With_Clause_Of (Clause, In_Tree);
               end loop;

               if No (Clause) then
                  --  As we have not found the project in the imports, we check
                  --  if it's the name of an eventual extended project.

                  if Present (Extended)
                    and then Name_Of (Extended, In_Tree) = Project_Name
                  then
                     Set_Project_Of_Renamed_Package_Of
                       (Package_Declaration, In_Tree, To => Extended);
                  else
                     Error_Msg_Name_1 := Project_Name;
                     Error_Msg
                       (Flags,
                        "% is not an imported or extended project", Token_Ptr);
                  end if;
               else
                  Set_Project_Of_Renamed_Package_Of
                    (Package_Declaration, In_Tree, To => The_Project);
               end if;
            end;

            Scan (In_Tree);
            Expect (Tok_Dot, "`.`");

            if Token = Tok_Dot then
               Scan (In_Tree);
               Expect (Tok_Identifier, "identifier");

               if Token = Tok_Identifier then
                  if Name_Of (Package_Declaration, In_Tree) /= Token_Name then
                     Error_Msg (Flags, "not the same package name", Token_Ptr);
                  elsif
                    Present (Project_Of_Renamed_Package_Of
                               (Package_Declaration, In_Tree))
                  then
                     declare
                        Current : Project_Node_Id :=
                                    First_Package_Of
                                      (Project_Of_Renamed_Package_Of
                                           (Package_Declaration, In_Tree),
                                       In_Tree);

                     begin
                        while Present (Current)
                          and then Name_Of (Current, In_Tree) /= Token_Name
                        loop
                           Current :=
                             Next_Package_In_Project (Current, In_Tree);
                        end loop;

                        if No (Current) then
                           Error_Msg
                             (Flags, """" &
                              Get_Name_String (Token_Name) &
                              """ is not a package declared by the project",
                              Token_Ptr);
                        end if;
                     end;
                  end if;

                  Scan (In_Tree);
               end if;
            end if;
         end if;
      end if;

      if Renaming then
         Expect (Tok_Semicolon, "`;`");
         Set_End_Of_Line (Package_Declaration);
         Set_Previous_Line_Node (Package_Declaration);

      elsif Token = Tok_Is then
         Set_End_Of_Line (Package_Declaration);
         Set_Previous_Line_Node (Package_Declaration);
         Set_Next_End_Node (Package_Declaration);

         Parse_Declarative_Items
           (In_Tree           => In_Tree,
            Declarations      => First_Declarative_Item,
            In_Zone           => In_Package,
            First_Attribute   => First_Attribute,
            Current_Project   => Current_Project,
            Current_Package   => Package_Declaration,
            Packages_To_Check => Packages_To_Check,
            Is_Config_File    => Is_Config_File,
            Flags             => Flags);

         Set_First_Declarative_Item_Of
           (Package_Declaration, In_Tree, To => First_Declarative_Item);

         Expect (Tok_End, "END");

         if Token = Tok_End then

            --  Scan past "end"

            Scan (In_Tree);
         end if;

         --  We should have the name of the package after "end"

         Expect (Tok_Identifier, "identifier");

         if Token = Tok_Identifier
           and then Name_Of (Package_Declaration, In_Tree) /= No_Name
           and then Token_Name /= Name_Of (Package_Declaration, In_Tree)
         then
            Error_Msg_Name_1 := Name_Of (Package_Declaration, In_Tree);
            Error_Msg (Flags, "expected %%", Token_Ptr);
         end if;

         if Token /= Tok_Semicolon then

            --  Scan past the package name

            Scan (In_Tree);
         end if;

         Expect (Tok_Semicolon, "`;`");
         Remove_Next_End_Node;

      else
         Error_Msg (Flags, "expected IS", Token_Ptr);
      end if;

   end Parse_Package_Declaration;

   -----------------------------------
   -- Parse_String_Type_Declaration --
   -----------------------------------

   procedure Parse_String_Type_Declaration
     (In_Tree         : Project_Node_Tree_Ref;
      String_Type     : out Project_Node_Id;
      Current_Project : Project_Node_Id;
      Flags           : Processing_Flags)
   is
      Current      : Project_Node_Id := Empty_Node;
      First_String : Project_Node_Id := Empty_Node;

   begin
      String_Type :=
        Default_Project_Node
          (Of_Kind => N_String_Type_Declaration, In_Tree => In_Tree);

      Set_Location_Of (String_Type, In_Tree, To => Token_Ptr);

      --  Scan past "type"

      Scan (In_Tree);

      Expect (Tok_Identifier, "identifier");

      if Token = Tok_Identifier then
         Set_Name_Of (String_Type, In_Tree, To => Token_Name);

         Current := First_String_Type_Of (Current_Project, In_Tree);
         while Present (Current)
           and then
           Name_Of (Current, In_Tree) /= Token_Name
         loop
            Current := Next_String_Type (Current, In_Tree);
         end loop;

         if Present (Current) then
            Error_Msg (Flags,
                       "duplicate string type name """ &
                       Get_Name_String (Token_Name) &
                       """",
                       Token_Ptr);
         else
            Current := First_Variable_Of (Current_Project, In_Tree);
            while Present (Current)
              and then Name_Of (Current, In_Tree) /= Token_Name
            loop
               Current := Next_Variable (Current, In_Tree);
            end loop;

            if Present (Current) then
               Error_Msg (Flags,
                          """" &
                          Get_Name_String (Token_Name) &
                          """ is already a variable name", Token_Ptr);
            else
               Set_Next_String_Type
                 (String_Type, In_Tree,
                  To => First_String_Type_Of (Current_Project, In_Tree));
               Set_First_String_Type_Of
                 (Current_Project, In_Tree, To => String_Type);
            end if;
         end if;

         --  Scan past the name

         Scan (In_Tree);
      end if;

      Expect (Tok_Is, "IS");

      if Token = Tok_Is then
         Scan (In_Tree);
      end if;

      Expect (Tok_Left_Paren, "`(`");

      if Token = Tok_Left_Paren then
         Scan (In_Tree);
      end if;

      Parse_String_Type_List
        (In_Tree => In_Tree, First_String => First_String, Flags => Flags);
      Set_First_Literal_String (String_Type, In_Tree, To => First_String);

      Expect (Tok_Right_Paren, "`)`");

      if Token = Tok_Right_Paren then
         Scan (In_Tree);
      end if;
   end Parse_String_Type_Declaration;

   --------------------------------
   -- Parse_Variable_Declaration --
   --------------------------------

   procedure Parse_Variable_Declaration
     (In_Tree         : Project_Node_Tree_Ref;
      Variable        : out Project_Node_Id;
      Current_Project : Project_Node_Id;
      Current_Package : Project_Node_Id;
      Flags           : Processing_Flags)
   is
      Expression_Location      : Source_Ptr;
      String_Type_Name         : Name_Id := No_Name;
      Project_String_Type_Name : Name_Id := No_Name;
      Type_Location            : Source_Ptr := No_Location;
      Project_Location         : Source_Ptr := No_Location;
      Expression               : Project_Node_Id := Empty_Node;
      Variable_Name            : constant Name_Id := Token_Name;
      OK                       : Boolean := True;

   begin
      Variable :=
        Default_Project_Node
          (Of_Kind => N_Variable_Declaration, In_Tree => In_Tree);
      Set_Name_Of (Variable, In_Tree, To => Variable_Name);
      Set_Location_Of (Variable, In_Tree, To => Token_Ptr);

      --  Scan past the variable name

      Scan (In_Tree);

      if Token = Tok_Colon then

         --  Typed string variable declaration

         Scan (In_Tree);
         Set_Kind_Of (Variable, In_Tree, N_Typed_Variable_Declaration);
         Expect (Tok_Identifier, "identifier");

         OK := Token = Tok_Identifier;

         if OK then
            String_Type_Name := Token_Name;
            Type_Location := Token_Ptr;
            Scan (In_Tree);

            if Token = Tok_Dot then
               Project_String_Type_Name := String_Type_Name;
               Project_Location := Type_Location;

               --  Scan past the dot

               Scan (In_Tree);
               Expect (Tok_Identifier, "identifier");

               if Token = Tok_Identifier then
                  String_Type_Name := Token_Name;
                  Type_Location := Token_Ptr;
                  Scan (In_Tree);
               else
                  OK := False;
               end if;
            end if;

            if OK then
               declare
                  Proj    : Project_Node_Id := Current_Project;
                  Current : Project_Node_Id := Empty_Node;

               begin
                  if Project_String_Type_Name /= No_Name then
                     declare
                        The_Project_Name_And_Node : constant
                          Tree_Private_Part.Project_Name_And_Node :=
                          Tree_Private_Part.Projects_Htable.Get
                            (In_Tree.Projects_HT, Project_String_Type_Name);

                        use Tree_Private_Part;

                     begin
                        if The_Project_Name_And_Node =
                             Tree_Private_Part.No_Project_Name_And_Node
                        then
                           Error_Msg (Flags,
                                      "unknown project """ &
                                      Get_Name_String
                                         (Project_String_Type_Name) &
                                      """",
                                      Project_Location);
                           Current := Empty_Node;
                        else
                           Current :=
                             First_String_Type_Of
                               (The_Project_Name_And_Node.Node, In_Tree);
                           while
                             Present (Current)
                             and then
                               Name_Of (Current, In_Tree) /= String_Type_Name
                           loop
                              Current := Next_String_Type (Current, In_Tree);
                           end loop;
                        end if;
                     end;

                  else
                     --  Look for a string type with the correct name in this
                     --  project or in any of its ancestors.

                     loop
                        Current :=
                          First_String_Type_Of (Proj, In_Tree);
                        while
                          Present (Current)
                          and then
                            Name_Of (Current, In_Tree) /= String_Type_Name
                        loop
                           Current := Next_String_Type (Current, In_Tree);
                        end loop;

                        exit when Present (Current);

                        Proj := Parent_Project_Of (Proj, In_Tree);
                        exit when No (Proj);
                     end loop;
                  end if;

                  if No (Current) then
                     Error_Msg (Flags,
                                "unknown string type """ &
                                Get_Name_String (String_Type_Name) &
                                """",
                                Type_Location);
                     OK := False;

                  else
                     Set_String_Type_Of
                       (Variable, In_Tree, To => Current);
                  end if;
               end;
            end if;
         end if;
      end if;

      Expect (Tok_Colon_Equal, "`:=`");

      OK := OK and then Token = Tok_Colon_Equal;

      if Token = Tok_Colon_Equal then
         Scan (In_Tree);
      end if;

      --  Get the single string or string list value

      Expression_Location := Token_Ptr;

      Parse_Expression
        (In_Tree         => In_Tree,
         Expression      => Expression,
         Flags           => Flags,
         Current_Project => Current_Project,
         Current_Package => Current_Package,
         Optional_Index  => False);
      Set_Expression_Of (Variable, In_Tree, To => Expression);

      if Present (Expression) then
         --  A typed string must have a single string value, not a list

         if Kind_Of (Variable, In_Tree) = N_Typed_Variable_Declaration
           and then Expression_Kind_Of (Expression, In_Tree) = List
         then
            Error_Msg
              (Flags,
               "expression must be a single string", Expression_Location);
         end if;

         Set_Expression_Kind_Of
           (Variable, In_Tree,
            To => Expression_Kind_Of (Expression, In_Tree));
      end if;

      if OK then
         declare
            The_Variable : Project_Node_Id := Empty_Node;

         begin
            if Present (Current_Package) then
               The_Variable := First_Variable_Of (Current_Package, In_Tree);
            elsif Present (Current_Project) then
               The_Variable := First_Variable_Of (Current_Project, In_Tree);
            end if;

            while Present (The_Variable)
              and then Name_Of (The_Variable, In_Tree) /= Variable_Name
            loop
               The_Variable := Next_Variable (The_Variable, In_Tree);
            end loop;

            if No (The_Variable) then
               if Present (Current_Package) then
                  Set_Next_Variable
                    (Variable, In_Tree,
                     To => First_Variable_Of (Current_Package, In_Tree));
                  Set_First_Variable_Of
                    (Current_Package, In_Tree, To => Variable);

               elsif Present (Current_Project) then
                  Set_Next_Variable
                    (Variable, In_Tree,
                     To => First_Variable_Of (Current_Project, In_Tree));
                  Set_First_Variable_Of
                    (Current_Project, In_Tree, To => Variable);
               end if;

            else
               if Expression_Kind_Of (Variable, In_Tree) /= Undefined then
                  if Expression_Kind_Of (The_Variable, In_Tree) =
                                                            Undefined
                  then
                     Set_Expression_Kind_Of
                       (The_Variable, In_Tree,
                        To => Expression_Kind_Of (Variable, In_Tree));

                  else
                     if Expression_Kind_Of (The_Variable, In_Tree) /=
                       Expression_Kind_Of (Variable, In_Tree)
                     then
                        Error_Msg (Flags,
                                   "wrong expression kind for variable """ &
                                   Get_Name_String
                                     (Name_Of (The_Variable, In_Tree)) &
                                     """",
                                   Expression_Location);
                     end if;
                  end if;
               end if;
            end if;
         end;
      end if;
   end Parse_Variable_Declaration;

end Prj.Dect;