summaryrefslogtreecommitdiff
path: root/gcc/ada/a-ciorma.adb
blob: 9cfcd3f5a809e40612fc62acc9741796db642678 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT LIBRARY COMPONENTS                          --
--                                                                          --
--                 ADA.CONTAINERS.INDEFINITE_ORDERED_MAPS                   --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 2004-2010, 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.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- This unit was originally developed by Matthew J Heaney.                  --
------------------------------------------------------------------------------

with Ada.Unchecked_Deallocation;

with Ada.Containers.Red_Black_Trees.Generic_Operations;
pragma Elaborate_All (Ada.Containers.Red_Black_Trees.Generic_Operations);

with Ada.Containers.Red_Black_Trees.Generic_Keys;
pragma Elaborate_All (Ada.Containers.Red_Black_Trees.Generic_Keys);

package body Ada.Containers.Indefinite_Ordered_Maps is

   -----------------------------
   -- Node Access Subprograms --
   -----------------------------

   --  These subprograms provide a functional interface to access fields
   --  of a node, and a procedural interface for modifying these values.

   function Color (Node : Node_Access) return Color_Type;
   pragma Inline (Color);

   function Left (Node : Node_Access) return Node_Access;
   pragma Inline (Left);

   function Parent (Node : Node_Access) return Node_Access;
   pragma Inline (Parent);

   function Right (Node : Node_Access) return Node_Access;
   pragma Inline (Right);

   procedure Set_Parent (Node : Node_Access; Parent : Node_Access);
   pragma Inline (Set_Parent);

   procedure Set_Left (Node : Node_Access; Left : Node_Access);
   pragma Inline (Set_Left);

   procedure Set_Right (Node : Node_Access; Right : Node_Access);
   pragma Inline (Set_Right);

   procedure Set_Color (Node : Node_Access; Color : Color_Type);
   pragma Inline (Set_Color);

   -----------------------
   -- Local Subprograms --
   -----------------------

   function Copy_Node (Source : Node_Access) return Node_Access;
   pragma Inline (Copy_Node);

   procedure Free (X : in out Node_Access);

   function Is_Equal_Node_Node
     (L, R : Node_Access) return Boolean;
   pragma Inline (Is_Equal_Node_Node);

   function Is_Greater_Key_Node
     (Left  : Key_Type;
      Right : Node_Access) return Boolean;
   pragma Inline (Is_Greater_Key_Node);

   function Is_Less_Key_Node
     (Left  : Key_Type;
      Right : Node_Access) return Boolean;
   pragma Inline (Is_Less_Key_Node);

   --------------------------
   -- Local Instantiations --
   --------------------------

   package Tree_Operations is
     new Red_Black_Trees.Generic_Operations (Tree_Types);

   procedure Delete_Tree is
      new Tree_Operations.Generic_Delete_Tree (Free);

   function Copy_Tree is
      new Tree_Operations.Generic_Copy_Tree (Copy_Node, Delete_Tree);

   use Tree_Operations;

   package Key_Ops is
     new Red_Black_Trees.Generic_Keys
       (Tree_Operations     => Tree_Operations,
        Key_Type            => Key_Type,
        Is_Less_Key_Node    => Is_Less_Key_Node,
        Is_Greater_Key_Node => Is_Greater_Key_Node);

   procedure Free_Key is
     new Ada.Unchecked_Deallocation (Key_Type, Key_Access);

   procedure Free_Element is
     new Ada.Unchecked_Deallocation (Element_Type, Element_Access);

   function Is_Equal is
     new Tree_Operations.Generic_Equal (Is_Equal_Node_Node);

   ---------
   -- "<" --
   ---------

   function "<" (Left, Right : Cursor) return Boolean is
   begin
      if Left.Node = null then
         raise Constraint_Error with "Left cursor of ""<"" equals No_Element";
      end if;

      if Right.Node = null then
         raise Constraint_Error with "Right cursor of ""<"" equals No_Element";
      end if;

      if Left.Node.Key = null then
         raise Program_Error with "Left cursor in ""<"" is bad";
      end if;

      if Right.Node.Key = null then
         raise Program_Error with "Right cursor in ""<"" is bad";
      end if;

      pragma Assert (Vet (Left.Container.Tree, Left.Node),
                     "Left cursor in ""<"" is bad");

      pragma Assert (Vet (Right.Container.Tree, Right.Node),
                     "Right cursor in ""<"" is bad");

      return Left.Node.Key.all < Right.Node.Key.all;
   end "<";

   function "<" (Left : Cursor; Right : Key_Type) return Boolean is
   begin
      if Left.Node = null then
         raise Constraint_Error with "Left cursor of ""<"" equals No_Element";
      end if;

      if Left.Node.Key = null then
         raise Program_Error with "Left cursor in ""<"" is bad";
      end if;

      pragma Assert (Vet (Left.Container.Tree, Left.Node),
                     "Left cursor in ""<"" is bad");

      return Left.Node.Key.all < Right;
   end "<";

   function "<" (Left : Key_Type; Right : Cursor) return Boolean is
   begin
      if Right.Node = null then
         raise Constraint_Error with "Right cursor of ""<"" equals No_Element";
      end if;

      if Right.Node.Key = null then
         raise Program_Error with "Right cursor in ""<"" is bad";
      end if;

      pragma Assert (Vet (Right.Container.Tree, Right.Node),
                     "Right cursor in ""<"" is bad");

      return Left < Right.Node.Key.all;
   end "<";

   ---------
   -- "=" --
   ---------

   function "=" (Left, Right : Map) return Boolean is
   begin
      return Is_Equal (Left.Tree, Right.Tree);
   end "=";

   ---------
   -- ">" --
   ---------

   function ">" (Left, Right : Cursor) return Boolean is
   begin
      if Left.Node = null then
         raise Constraint_Error with "Left cursor of "">"" equals No_Element";
      end if;

      if Right.Node = null then
         raise Constraint_Error with "Right cursor of "">"" equals No_Element";
      end if;

      if Left.Node.Key = null then
         raise Program_Error with "Left cursor in ""<"" is bad";
      end if;

      if Right.Node.Key = null then
         raise Program_Error with "Right cursor in ""<"" is bad";
      end if;

      pragma Assert (Vet (Left.Container.Tree, Left.Node),
                     "Left cursor in "">"" is bad");

      pragma Assert (Vet (Right.Container.Tree, Right.Node),
                     "Right cursor in "">"" is bad");

      return Right.Node.Key.all < Left.Node.Key.all;
   end ">";

   function ">" (Left : Cursor; Right : Key_Type) return Boolean is
   begin
      if Left.Node = null then
         raise Constraint_Error with "Left cursor of "">"" equals No_Element";
      end if;

      if Left.Node.Key = null then
         raise Program_Error with "Left cursor in ""<"" is bad";
      end if;

      pragma Assert (Vet (Left.Container.Tree, Left.Node),
                     "Left cursor in "">"" is bad");

      return Right < Left.Node.Key.all;
   end ">";

   function ">" (Left : Key_Type; Right : Cursor) return Boolean is
   begin
      if Right.Node = null then
         raise Constraint_Error with "Right cursor of "">"" equals No_Element";
      end if;

      if Right.Node.Key = null then
         raise Program_Error with "Right cursor in ""<"" is bad";
      end if;

      pragma Assert (Vet (Right.Container.Tree, Right.Node),
                     "Right cursor in "">"" is bad");

      return Right.Node.Key.all < Left;
   end ">";

   ------------
   -- Adjust --
   ------------

   procedure Adjust is
      new Tree_Operations.Generic_Adjust (Copy_Tree);

   procedure Adjust (Container : in out Map) is
   begin
      Adjust (Container.Tree);
   end Adjust;

   -------------
   -- Ceiling --
   -------------

   function Ceiling (Container : Map; Key : Key_Type) return Cursor is
      Node : constant Node_Access := Key_Ops.Ceiling (Container.Tree, Key);

   begin
      if Node = null then
         return No_Element;
      end if;

      return Cursor'(Container'Unrestricted_Access, Node);
   end Ceiling;

   -----------
   -- Clear --
   -----------

   procedure Clear is
      new Tree_Operations.Generic_Clear (Delete_Tree);

   procedure Clear (Container : in out Map) is
   begin
      Clear (Container.Tree);
   end Clear;

   -----------
   -- Color --
   -----------

   function Color (Node : Node_Access) return Color_Type is
   begin
      return Node.Color;
   end Color;

   --------------
   -- Contains --
   --------------

   function Contains (Container : Map; Key : Key_Type) return Boolean is
   begin
      return Find (Container, Key) /= No_Element;
   end Contains;

   ---------------
   -- Copy_Node --
   ---------------

   function Copy_Node (Source : Node_Access) return Node_Access is
      K : Key_Access := new Key_Type'(Source.Key.all);
      E : Element_Access;
   begin
      E := new Element_Type'(Source.Element.all);

      return new Node_Type'(Parent  => null,
                            Left    => null,
                            Right   => null,
                            Color   => Source.Color,
                            Key     => K,
                            Element => E);
   exception
      when others =>
         Free_Key (K);
         Free_Element (E);
         raise;
   end Copy_Node;

   ------------
   -- Delete --
   ------------

   procedure Delete
     (Container : in out Map;
      Position  : in out Cursor)
   is
   begin
      if Position.Node = null then
         raise Constraint_Error with
           "Position cursor of Delete equals No_Element";
      end if;

      if Position.Node.Key = null
        or else Position.Node.Element = null
      then
         raise Program_Error with "Position cursor of Delete is bad";
      end if;

      if Position.Container /= Container'Unrestricted_Access then
         raise Program_Error with
           "Position cursor of Delete designates wrong map";
      end if;

      pragma Assert (Vet (Container.Tree, Position.Node),
                     "Position cursor of Delete is bad");

      Tree_Operations.Delete_Node_Sans_Free (Container.Tree, Position.Node);
      Free (Position.Node);

      Position.Container := null;
   end Delete;

   procedure Delete (Container : in out Map; Key : Key_Type) is
      X : Node_Access := Key_Ops.Find (Container.Tree, Key);

   begin
      if X = null then
         raise Constraint_Error with "key not in map";
      end if;

      Delete_Node_Sans_Free (Container.Tree, X);
      Free (X);
   end Delete;

   ------------------
   -- Delete_First --
   ------------------

   procedure Delete_First (Container : in out Map) is
      X : Node_Access := Container.Tree.First;

   begin
      if X /= null then
         Tree_Operations.Delete_Node_Sans_Free (Container.Tree, X);
         Free (X);
      end if;
   end Delete_First;

   -----------------
   -- Delete_Last --
   -----------------

   procedure Delete_Last (Container : in out Map) is
      X : Node_Access := Container.Tree.Last;

   begin
      if X /= null then
         Tree_Operations.Delete_Node_Sans_Free (Container.Tree, X);
         Free (X);
      end if;
   end Delete_Last;

   -------------
   -- Element --
   -------------

   function Element (Position : Cursor) return Element_Type is
   begin
      if Position.Node = null then
         raise Constraint_Error with
           "Position cursor of function Element equals No_Element";
      end if;

      if Position.Node.Element = null then
         raise Program_Error with
           "Position cursor of function Element is bad";
      end if;

      pragma Assert (Vet (Position.Container.Tree, Position.Node),
                     "Position cursor of function Element is bad");

      return Position.Node.Element.all;
   end Element;

   function Element (Container : Map; Key : Key_Type) return Element_Type is
      Node : constant Node_Access := Key_Ops.Find (Container.Tree, Key);

   begin
      if Node = null then
         raise Constraint_Error with "key not in map";
      end if;

      return Node.Element.all;
   end Element;

   ---------------------
   -- Equivalent_Keys --
   ---------------------

   function Equivalent_Keys (Left, Right : Key_Type) return Boolean is
   begin
      if Left < Right
        or else Right < Left
      then
         return False;
      else
         return True;
      end if;
   end Equivalent_Keys;

   -------------
   -- Exclude --
   -------------

   procedure Exclude (Container : in out Map; Key : Key_Type) is
      X : Node_Access := Key_Ops.Find (Container.Tree, Key);

   begin
      if X /= null then
         Tree_Operations.Delete_Node_Sans_Free (Container.Tree, X);
         Free (X);
      end if;
   end Exclude;

   ----------
   -- Find --
   ----------

   function Find (Container : Map; Key : Key_Type) return Cursor is
      Node : constant Node_Access := Key_Ops.Find (Container.Tree, Key);

   begin
      if Node = null then
         return No_Element;
      end if;

      return Cursor'(Container'Unrestricted_Access, Node);
   end Find;

   -----------
   -- First --
   -----------

   function First (Container : Map) return Cursor is
      T : Tree_Type renames Container.Tree;

   begin
      if T.First = null then
         return No_Element;
      end if;

      return Cursor'(Container'Unrestricted_Access, T.First);
   end First;

   -------------------
   -- First_Element --
   -------------------

   function First_Element (Container : Map) return Element_Type is
      T : Tree_Type renames Container.Tree;

   begin
      if T.First = null then
         raise Constraint_Error with "map is empty";
      end if;

      return T.First.Element.all;
   end First_Element;

   ---------------
   -- First_Key --
   ---------------

   function First_Key (Container : Map) return Key_Type is
      T : Tree_Type renames Container.Tree;

   begin
      if T.First = null then
         raise Constraint_Error with "map is empty";
      end if;

      return T.First.Key.all;
   end First_Key;

   -----------
   -- Floor --
   -----------

   function Floor (Container : Map; Key : Key_Type) return Cursor is
      Node : constant Node_Access := Key_Ops.Floor (Container.Tree, Key);

   begin
      if Node = null then
         return No_Element;
      end if;

      return Cursor'(Container'Unrestricted_Access, Node);
   end Floor;

   ----------
   -- Free --
   ----------

   procedure Free (X : in out Node_Access) is
      procedure Deallocate is
        new Ada.Unchecked_Deallocation (Node_Type, Node_Access);

   begin
      if X = null then
         return;
      end if;

      X.Parent := X;
      X.Left := X;
      X.Right := X;

      begin
         Free_Key (X.Key);
      exception
         when others =>
            X.Key := null;

            begin
               Free_Element (X.Element);
            exception
               when others =>
                  X.Element := null;
            end;

            Deallocate (X);
            raise;
      end;

      begin
         Free_Element (X.Element);
      exception
         when others =>
            X.Element := null;

            Deallocate (X);
            raise;
      end;

      Deallocate (X);
   end Free;

   -----------------
   -- Has_Element --
   -----------------

   function Has_Element (Position : Cursor) return Boolean is
   begin
      return Position /= No_Element;
   end Has_Element;

   -------------
   -- Include --
   -------------

   procedure Include
     (Container : in out Map;
      Key       : Key_Type;
      New_Item  : Element_Type)
   is
      Position : Cursor;
      Inserted : Boolean;

      K : Key_Access;
      E : Element_Access;

   begin
      Insert (Container, Key, New_Item, Position, Inserted);

      if not Inserted then
         if Container.Tree.Lock > 0 then
            raise Program_Error with
              "attempt to tamper with elements (map is locked)";
         end if;

         K := Position.Node.Key;
         E := Position.Node.Element;

         Position.Node.Key := new Key_Type'(Key);

         begin
            Position.Node.Element := new Element_Type'(New_Item);
         exception
            when others =>
               Free_Key (K);
               raise;
         end;

         Free_Key (K);
         Free_Element (E);
      end if;
   end Include;

   ------------
   -- Insert --
   ------------

   procedure Insert
     (Container : in out Map;
      Key       : Key_Type;
      New_Item  : Element_Type;
      Position  : out Cursor;
      Inserted  : out Boolean)
   is
      function New_Node return Node_Access;
      pragma Inline (New_Node);

      procedure Insert_Post is
        new Key_Ops.Generic_Insert_Post (New_Node);

      procedure Insert_Sans_Hint is
        new Key_Ops.Generic_Conditional_Insert (Insert_Post);

      --------------
      -- New_Node --
      --------------

      function New_Node return Node_Access is
         Node : Node_Access := new Node_Type;

      begin
         Node.Key := new Key_Type'(Key);
         Node.Element := new Element_Type'(New_Item);
         return Node;

      exception
         when others =>

            --  On exception, deallocate key and elem

            Free (Node);  --  Note that Free deallocates key and elem too
            raise;
      end New_Node;

   --  Start of processing for Insert

   begin
      Insert_Sans_Hint
        (Container.Tree,
         Key,
         Position.Node,
         Inserted);

      Position.Container := Container'Unrestricted_Access;
   end Insert;

   procedure Insert
     (Container : in out Map;
      Key       : Key_Type;
      New_Item  : Element_Type)
   is
      Position : Cursor;
      pragma Unreferenced (Position);

      Inserted : Boolean;

   begin
      Insert (Container, Key, New_Item, Position, Inserted);

      if not Inserted then
         raise Constraint_Error with "key already in map";
      end if;
   end Insert;

   --------------
   -- Is_Empty --
   --------------

   function Is_Empty (Container : Map) return Boolean is
   begin
      return Container.Tree.Length = 0;
   end Is_Empty;

   ------------------------
   -- Is_Equal_Node_Node --
   ------------------------

   function Is_Equal_Node_Node
     (L, R : Node_Access) return Boolean is
   begin
      if L.Key.all < R.Key.all then
         return False;

      elsif R.Key.all < L.Key.all then
         return False;

      else
         return L.Element.all = R.Element.all;
      end if;
   end Is_Equal_Node_Node;

   -------------------------
   -- Is_Greater_Key_Node --
   -------------------------

   function Is_Greater_Key_Node
     (Left  : Key_Type;
      Right : Node_Access) return Boolean
   is
   begin
      --  k > node same as node < k

      return Right.Key.all < Left;
   end Is_Greater_Key_Node;

   ----------------------
   -- Is_Less_Key_Node --
   ----------------------

   function Is_Less_Key_Node
     (Left  : Key_Type;
      Right : Node_Access) return Boolean is
   begin
      return Left < Right.Key.all;
   end Is_Less_Key_Node;

   -------------
   -- Iterate --
   -------------

   procedure Iterate
     (Container : Map;
      Process   : not null access procedure (Position : Cursor))
   is
      procedure Process_Node (Node : Node_Access);
      pragma Inline (Process_Node);

      procedure Local_Iterate is
        new Tree_Operations.Generic_Iteration (Process_Node);

      ------------------
      -- Process_Node --
      ------------------

      procedure Process_Node (Node : Node_Access) is
      begin
         Process (Cursor'(Container'Unrestricted_Access, Node));
      end Process_Node;

      B : Natural renames Container.Tree'Unrestricted_Access.all.Busy;

   --  Start of processing for Iterate

   begin
      B := B + 1;

      begin
         Local_Iterate (Container.Tree);
      exception
         when others =>
            B := B - 1;
            raise;
      end;

      B := B - 1;
   end Iterate;

   ---------
   -- Key --
   ---------

   function Key (Position : Cursor) return Key_Type is
   begin
      if Position.Node = null then
         raise Constraint_Error with
           "Position cursor of function Key equals No_Element";
      end if;

      if Position.Node.Key = null then
         raise Program_Error with
           "Position cursor of function Key is bad";
      end if;

      pragma Assert (Vet (Position.Container.Tree, Position.Node),
                     "Position cursor of function Key is bad");

      return Position.Node.Key.all;
   end Key;

   ----------
   -- Last --
   ----------

   function Last (Container : Map) return Cursor is
      T : Tree_Type renames Container.Tree;

   begin
      if T.Last = null then
         return No_Element;
      end if;

      return Cursor'(Container'Unrestricted_Access, T.Last);
   end Last;

   ------------------
   -- Last_Element --
   ------------------

   function Last_Element (Container : Map) return Element_Type is
      T : Tree_Type renames Container.Tree;

   begin
      if T.Last = null then
         raise Constraint_Error with "map is empty";
      end if;

      return T.Last.Element.all;
   end Last_Element;

   --------------
   -- Last_Key --
   --------------

   function Last_Key (Container : Map) return Key_Type is
      T : Tree_Type renames Container.Tree;

   begin
      if T.Last = null then
         raise Constraint_Error with "map is empty";
      end if;

      return T.Last.Key.all;
   end Last_Key;

   ----------
   -- Left --
   ----------

   function Left (Node : Node_Access) return Node_Access is
   begin
      return Node.Left;
   end Left;

   ------------
   -- Length --
   ------------

   function Length (Container : Map) return Count_Type is
   begin
      return Container.Tree.Length;
   end Length;

   ----------
   -- Move --
   ----------

   procedure Move is
      new Tree_Operations.Generic_Move (Clear);

   procedure Move (Target : in out Map; Source : in out Map) is
   begin
      Move (Target => Target.Tree, Source => Source.Tree);
   end Move;

   ----------
   -- Next --
   ----------

   function Next (Position : Cursor) return Cursor is
   begin
      if Position = No_Element then
         return No_Element;
      end if;

      pragma Assert (Position.Node /= null);
      pragma Assert (Position.Node.Key /= null);
      pragma Assert (Position.Node.Element /= null);
      pragma Assert (Vet (Position.Container.Tree, Position.Node),
                     "Position cursor of Next is bad");

      declare
         Node : constant Node_Access :=
                  Tree_Operations.Next (Position.Node);

      begin
         if Node = null then
            return No_Element;
         else
            return Cursor'(Position.Container, Node);
         end if;
      end;
   end Next;

   procedure Next (Position : in out Cursor) is
   begin
      Position := Next (Position);
   end Next;

   ------------
   -- Parent --
   ------------

   function Parent (Node : Node_Access) return Node_Access is
   begin
      return Node.Parent;
   end Parent;

   --------------
   -- Previous --
   --------------

   function Previous (Position : Cursor) return Cursor is
   begin
      if Position = No_Element then
         return No_Element;
      end if;

      pragma Assert (Position.Node /= null);
      pragma Assert (Position.Node.Key /= null);
      pragma Assert (Position.Node.Element /= null);
      pragma Assert (Vet (Position.Container.Tree, Position.Node),
                     "Position cursor of Previous is bad");

      declare
         Node : constant Node_Access :=
                  Tree_Operations.Previous (Position.Node);

      begin
         if Node = null then
            return No_Element;
         end if;

         return Cursor'(Position.Container, Node);
      end;
   end Previous;

   procedure Previous (Position : in out Cursor) is
   begin
      Position := Previous (Position);
   end Previous;

   -------------------
   -- Query_Element --
   -------------------

   procedure Query_Element
     (Position : Cursor;
      Process  : not null access procedure (Key     : Key_Type;
                                            Element : Element_Type))
   is
   begin
      if Position.Node = null then
         raise Constraint_Error with
           "Position cursor of Query_Element equals No_Element";
      end if;

      if Position.Node.Key = null
        or else Position.Node.Element = null
      then
         raise Program_Error with
           "Position cursor of Query_Element is bad";
      end if;

      pragma Assert (Vet (Position.Container.Tree, Position.Node),
                     "Position cursor of Query_Element is bad");

      declare
         T : Tree_Type renames Position.Container.Tree;

         B : Natural renames T.Busy;
         L : Natural renames T.Lock;

      begin
         B := B + 1;
         L := L + 1;

         declare
            K : Key_Type renames Position.Node.Key.all;
            E : Element_Type renames Position.Node.Element.all;

         begin
            Process (K, E);
         exception
            when others =>
               L := L - 1;
               B := B - 1;
               raise;
         end;

         L := L - 1;
         B := B - 1;
      end;
   end Query_Element;

   ----------
   -- Read --
   ----------

   procedure Read
     (Stream    : not null access Root_Stream_Type'Class;
      Container : out Map)
   is
      function Read_Node
        (Stream : not null access Root_Stream_Type'Class) return Node_Access;
      pragma Inline (Read_Node);

      procedure Read is
         new Tree_Operations.Generic_Read (Clear, Read_Node);

      ---------------
      -- Read_Node --
      ---------------

      function Read_Node
        (Stream : not null access Root_Stream_Type'Class) return Node_Access
      is
         Node : Node_Access := new Node_Type;
      begin
         Node.Key := new Key_Type'(Key_Type'Input (Stream));
         Node.Element := new Element_Type'(Element_Type'Input (Stream));
         return Node;
      exception
         when others =>
            Free (Node);  --  Note that Free deallocates key and elem too
            raise;
      end Read_Node;

   --  Start of processing for Read

   begin
      Read (Stream, Container.Tree);
   end Read;

   procedure Read
     (Stream : not null access Root_Stream_Type'Class;
      Item   : out Cursor)
   is
   begin
      raise Program_Error with "attempt to stream map cursor";
   end Read;

   -------------
   -- Replace --
   -------------

   procedure Replace
     (Container : in out Map;
      Key       : Key_Type;
      New_Item  : Element_Type)
   is
      Node : constant Node_Access :=
               Key_Ops.Find (Container.Tree, Key);

      K : Key_Access;
      E : Element_Access;

   begin
      if Node = null then
         raise Constraint_Error with "key not in map";
      end if;

      if Container.Tree.Lock > 0 then
         raise Program_Error with
           "attempt to tamper with elements (map is locked)";
      end if;

      K := Node.Key;
      E := Node.Element;

      Node.Key := new Key_Type'(Key);

      begin
         Node.Element := new Element_Type'(New_Item);
      exception
         when others =>
            Free_Key (K);
            raise;
      end;

      Free_Key (K);
      Free_Element (E);
   end Replace;

   ---------------------
   -- Replace_Element --
   ---------------------

   procedure Replace_Element
     (Container : in out Map;
      Position  : Cursor;
      New_Item  : Element_Type)
   is
   begin
      if Position.Node = null then
         raise Constraint_Error with
           "Position cursor of Replace_Element equals No_Element";
      end if;

      if Position.Node.Key = null
        or else Position.Node.Element = null
      then
         raise Program_Error with
           "Position cursor of Replace_Element is bad";
      end if;

      if Position.Container /= Container'Unrestricted_Access then
         raise Program_Error with
           "Position cursor of Replace_Element designates wrong map";
      end if;

      if Container.Tree.Lock > 0 then
         raise Program_Error with
           "attempt to tamper with elements (map is locked)";
      end if;

      pragma Assert (Vet (Container.Tree, Position.Node),
                     "Position cursor of Replace_Element is bad");

      declare
         X : Element_Access := Position.Node.Element;

      begin
         Position.Node.Element := new Element_Type'(New_Item);
         Free_Element (X);
      end;
   end Replace_Element;

   ---------------------
   -- Reverse_Iterate --
   ---------------------

   procedure Reverse_Iterate
     (Container : Map;
      Process   : not null access procedure (Position : Cursor))
   is
      procedure Process_Node (Node : Node_Access);
      pragma Inline (Process_Node);

      procedure Local_Reverse_Iterate is
        new Tree_Operations.Generic_Reverse_Iteration (Process_Node);

      ------------------
      -- Process_Node --
      ------------------

      procedure Process_Node (Node : Node_Access) is
      begin
         Process (Cursor'(Container'Unrestricted_Access, Node));
      end Process_Node;

      B : Natural renames Container.Tree'Unrestricted_Access.all.Busy;

   --  Start of processing for Reverse_Iterate

   begin
      B := B + 1;

      begin
         Local_Reverse_Iterate (Container.Tree);
      exception
         when others =>
            B := B - 1;
            raise;
      end;

      B := B - 1;
   end Reverse_Iterate;

   -----------
   -- Right --
   -----------

   function Right (Node : Node_Access) return Node_Access is
   begin
      return Node.Right;
   end Right;

   ---------------
   -- Set_Color --
   ---------------

   procedure Set_Color (Node : Node_Access; Color : Color_Type) is
   begin
      Node.Color := Color;
   end Set_Color;

   --------------
   -- Set_Left --
   --------------

   procedure Set_Left (Node : Node_Access; Left : Node_Access) is
   begin
      Node.Left := Left;
   end Set_Left;

   ----------------
   -- Set_Parent --
   ----------------

   procedure Set_Parent (Node : Node_Access; Parent : Node_Access) is
   begin
      Node.Parent := Parent;
   end Set_Parent;

   ---------------
   -- Set_Right --
   ---------------

   procedure Set_Right (Node : Node_Access; Right : Node_Access) is
   begin
      Node.Right := Right;
   end Set_Right;

   --------------------
   -- Update_Element --
   --------------------

   procedure Update_Element
     (Container : in out Map;
      Position  : Cursor;
      Process   : not null access procedure (Key     : Key_Type;
                                             Element : in out Element_Type))
   is
   begin
      if Position.Node = null then
         raise Constraint_Error with
           "Position cursor of Update_Element equals No_Element";
      end if;

      if Position.Node.Key = null
        or else Position.Node.Element = null
      then
         raise Program_Error with
           "Position cursor of Update_Element is bad";
      end if;

      if Position.Container /= Container'Unrestricted_Access then
         raise Program_Error with
           "Position cursor of Update_Element designates wrong map";
      end if;

      pragma Assert (Vet (Container.Tree, Position.Node),
                     "Position cursor of Update_Element is bad");

      declare
         T : Tree_Type renames Position.Container.Tree;

         B : Natural renames T.Busy;
         L : Natural renames T.Lock;

      begin
         B := B + 1;
         L := L + 1;

         declare
            K : Key_Type renames Position.Node.Key.all;
            E : Element_Type renames Position.Node.Element.all;

         begin
            Process (K, E);

         exception
            when others =>
               L := L - 1;
               B := B - 1;
               raise;
         end;

         L := L - 1;
         B := B - 1;
      end;
   end Update_Element;

   -----------
   -- Write --
   -----------

   procedure Write
     (Stream    : not null access Root_Stream_Type'Class;
      Container : Map)
   is
      procedure Write_Node
        (Stream : not null access Root_Stream_Type'Class;
         Node   : Node_Access);
      pragma Inline (Write_Node);

      procedure Write is
         new Tree_Operations.Generic_Write (Write_Node);

      ----------------
      -- Write_Node --
      ----------------

      procedure Write_Node
        (Stream : not null access Root_Stream_Type'Class;
         Node   : Node_Access)
      is
      begin
         Key_Type'Output (Stream, Node.Key.all);
         Element_Type'Output (Stream, Node.Element.all);
      end Write_Node;

   --  Start of processing for Write

   begin
      Write (Stream, Container.Tree);
   end Write;

   procedure Write
     (Stream : not null access Root_Stream_Type'Class;
      Item   : Cursor)
   is
   begin
      raise Program_Error with "attempt to stream map cursor";
   end Write;

end Ada.Containers.Indefinite_Ordered_Maps;