aboutsummaryrefslogtreecommitdiff
path: root/gcc/ada/prj.ads
blob: 21c796c4977bcd3e4935f0e0be0331c1610c8550 (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
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                                  P R J                                   --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 2001-2004 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 2,  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 COPYING.  If not, write --
-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
-- MA 02111-1307, USA.                                                      --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

--  The following package declares the data types for GNAT project.
--  These data types may be used by GNAT Project-aware tools.

--  Children of these package implements various services on these data types.
--  See in particular Prj.Pars and Prj.Env.

with Casing; use Casing;
with Scans;  use Scans;
with Table;
with Types;  use Types;

with GNAT.OS_Lib; use GNAT.OS_Lib;

with System.HTable; use System.HTable;

package Prj is

   Empty_Name : Name_Id;
   --  Name_Id for an empty name (no characters). Initialized by the call
   --  to procedure Initialize.

   All_Packages : constant String_List_Access := null;
   --  Default value of parameter Packages of procedures Parse, in Prj.Pars and
   --  Prj.Part, indicating that all packages should be checked.

   Virtual_Prefix : constant String := "v$";
   --  The prefix for virtual extending projects. Because of the '$', which is
   --  normally forbidden for project names, there cannot be any name clash.

   Project_File_Extension : String := ".gpr";
   --  The standard project file name extension. It is not a constant, because
   --  Canonical_Case_File_Name is called on this variable in the body of Prj.

   Default_Ada_Spec_Suffix : Name_Id;
   --  The Name_Id for the standard GNAT suffix for Ada spec source file
   --  name ".ads". Initialized by Prj.Initialize.

   Default_Ada_Body_Suffix : Name_Id;
   --  The Name_Id for the standard GNAT suffix for Ada body source file
   --  name ".adb". Initialized by Prj.Initialize.

   Slash : Name_Id;
   --  "/", used as the path of locally removed files

   type Language_Index is new Nat;

   No_Language_Index           : constant Language_Index := 0;
   First_Language_Index        : constant Language_Index := 1;
   First_Language_Indexes_Last : constant Language_Index := 5;

   Ada_Language_Index         : constant Language_Index :=
                                  First_Language_Index;
   C_Language_Index           : constant Language_Index :=
                                  Ada_Language_Index + 1;
   C_Plus_Plus_Language_Index : constant Language_Index :=
                                  C_Language_Index + 1;

   Last_Language_Index : Language_Index := No_Language_Index;

   subtype First_Language_Indexes is Language_Index
      range First_Language_Index .. First_Language_Indexes_Last;

   type Header_Num is range 0 .. 2047;

   function Hash is new System.HTable.Hash (Header_Num => Header_Num);

   function Hash (Name : Name_Id) return Header_Num;

   package Language_Indexes is new System.HTable.Simple_HTable
     (Header_Num => Header_Num,
      Element    => Language_Index,
      No_Element => No_Language_Index,
      Key        => Name_Id,
      Hash       => Hash,
      Equal      => "=");
   --  Mapping of language names to language indexes

   package Language_Names is new Table.Table
     (Table_Component_Type => Name_Id,
      Table_Index_Type     => Language_Index,
      Table_Low_Bound      => 1,
      Table_Initial        => 4,
      Table_Increment      => 100,
      Table_Name           => "Prj.Language_Names");
   --  The table for the name of programming languages

   procedure Add_Language_Name (Name : Name_Id);

   procedure Display_Language_Name (Language : Language_Index);

   type Languages_In_Project is array (First_Language_Indexes) of Boolean;
   --  Set of supported languages used in a project

   No_Languages : constant Languages_In_Project := (others => False);
   --  No supported languages are used

   type Supp_Language_Index is new Nat;
   No_Supp_Language_Index  : constant Supp_Language_Index := 0;

   type Supp_Language is record
      Index   : Language_Index := No_Language_Index;
      Present : Boolean := False;
      Next    : Supp_Language_Index := No_Supp_Language_Index;
   end record;

   package Present_Languages is new Table.Table
     (Table_Component_Type => Supp_Language,
      Table_Index_Type     => Supp_Language_Index,
      Table_Low_Bound      => 1,
      Table_Initial        => 4,
      Table_Increment      => 100,
      Table_Name           => "Prj.Present_Languages");
   --  The table for the presence of languages with an index that is outside
   --  of First_Language_Indexes.

   type Impl_Suffix_Array is array (First_Language_Indexes) of Name_Id;
   --  Suffixes for the non spec sources of the different supported languages
   --  in a project.

   No_Impl_Suffixes : constant Impl_Suffix_Array := (others => No_Name);
   --  A default value for the non spec source suffixes

   type Supp_Suffix is record
      Index   : Language_Index := No_Language_Index;
      Suffix  : Name_Id := No_Name;
      Next    : Supp_Language_Index := No_Supp_Language_Index;
   end record;

   package Supp_Suffix_Table is new Table.Table
     (Table_Component_Type => Supp_Suffix,
      Table_Index_Type     => Supp_Language_Index,
      Table_Low_Bound      => 1,
      Table_Initial        => 4,
      Table_Increment      => 100,
      Table_Name           => "Prj.Supp_Suffix_Table");
   --  The table for the presence of languages with an index that is outside
   --  of First_Language_Indexes.

   type Language_Kind is (GNU, other);

   type Name_List_Index is new Nat;
   No_Name_List            : constant Name_List_Index := 0;

   type Name_Node is record
      Name : Name_Id         := No_Name;
      Next : Name_List_Index := No_Name_List;
   end record;

   package Name_Lists is new Table.Table
     (Table_Component_Type => Name_Node,
      Table_Index_Type     => Name_List_Index,
      Table_Low_Bound      => 1,
      Table_Initial        => 10,
      Table_Increment      => 100,
      Table_Name           => "Prj.Name_Lists");
   --  The table for lists of names used in package Language_Processing

   type Language_Processing_Data is record
      Compiler_Drivers     : Name_List_Index := No_Name_List;
      Compiler_Paths       : Name_Id         := No_Name;
      Compiler_Kinds       : Language_Kind   := GNU;
      Dependency_Options   : Name_List_Index := No_Name_List;
      Compute_Dependencies : Name_List_Index := No_Name_List;
      Include_Options      : Name_List_Index := No_Name_List;
      Binder_Drivers       : Name_Id         := No_Name;
      Binder_Driver_Paths  : Name_Id         := No_Name;
   end record;

   Default_Language_Processing_Data :
     constant Language_Processing_Data :=
       (Compiler_Drivers     => No_Name_List,
        Compiler_Paths       => No_Name,
        Compiler_Kinds       => GNU,
        Dependency_Options   => No_Name_List,
        Compute_Dependencies => No_Name_List,
        Include_Options      => No_Name_List,
        Binder_Drivers       => No_Name,
        Binder_Driver_Paths  => No_Name);

   type First_Language_Processing_Data is
     array (First_Language_Indexes) of Language_Processing_Data;

   Default_First_Language_Processing_Data : First_Language_Processing_Data :=
     (others => Default_Language_Processing_Data);

   type Supp_Language_Data is record
      Index : Language_Index := No_Language_Index;
      Data  : Language_Processing_Data := Default_Language_Processing_Data;
      Next  : Supp_Language_Index := No_Supp_Language_Index;
   end record;

   package Supp_Languages is new Table.Table
     (Table_Component_Type => Supp_Language_Data,
      Table_Index_Type     => Supp_Language_Index,
      Table_Low_Bound      => 1,
      Table_Initial        => 4,
      Table_Increment      => 100,
      Table_Name           => "Prj.Supp_Languages");
   --  The table for language data when there are more languages than
   --  in First_Language_Indexes.

   type Other_Source_Id is new Nat;
   No_Other_Source : constant Other_Source_Id := 0;
   type Other_Source is record
      Language         : Language_Index;       --  language of the source
      File_Name        : Name_Id;              --  source file simple name
      Path_Name        : Name_Id;              --  source full path name
      Source_TS        : Time_Stamp_Type;      --  source file time stamp
      Object_Name      : Name_Id;              --  object file simple name
      Object_Path      : Name_Id;              --  object full path name
      Object_TS        : Time_Stamp_Type;      --  object file time stamp
      Dep_Name         : Name_Id;              --  dependency file simple name
      Dep_Path         : Name_Id;              --  dependency full path name
      Dep_TS           : Time_Stamp_Type;      --  dependency file time stamp
      Naming_Exception : Boolean := False;     --  True if a naming exception
      Next             : Other_Source_Id := No_Other_Source;
   end record;
   --  Data for a source in a language other than Ada

   package Other_Sources is new Table.Table
     (Table_Component_Type => Other_Source,
      Table_Index_Type     => Other_Source_Id,
      Table_Low_Bound      => 1,
      Table_Initial        => 200,
      Table_Increment      => 100,
      Table_Name           => "Prj.Other_Sources");
   --  The table for sources of languages other than Ada

   type Verbosity is (Default, Medium, High);
   --  Verbosity when parsing GNAT Project Files
   --    Default is default (very quiet, if no errors).
   --    Medium is more verbose.
   --    High is extremely verbose.

   type Lib_Kind is (Static, Dynamic, Relocatable);
   type Policy is (Autonomous, Compliant, Controlled, Restricted);
   --  Type to specify the symbol policy, when symbol control is supported.
   --  See full explanation about this type in package Symbols.
   --  Autonomous: Create a symbol file without considering any reference
   --  Compliant: Try to be as compatible as possible with an existing ref
   --  Controlled: Fail if symbols are not the same as those in the reference
   --  Restricted: Restrict the symbols to those in the symbol file

   type Symbol_Record is record
      Symbol_File   : Name_Id := No_Name;
      Reference     : Name_Id := No_Name;
      Symbol_Policy : Policy  := Autonomous;
   end record;
   --  Type to keep the symbol data to be used when building a shared library

   No_Symbols : Symbol_Record :=
     (Symbol_File   => No_Name,
      Reference     => No_Name,
      Symbol_Policy => Autonomous);
   --  The default value of the symbol data

   function Empty_String return Name_Id;
   --  Return the Name_Id for an empty string ""

   type Project_Id is new Nat;
   No_Project : constant Project_Id := 0;
   --  Id of a Project File

   type String_List_Id is new Nat;
   Nil_String : constant String_List_Id := 0;
   type String_Element is record
      Value    : Name_Id        := No_Name;
      Index    : Int            := 0;
      Display_Value : Name_Id   := No_Name;
      Location : Source_Ptr     := No_Location;
      Flag     : Boolean        := False;
      Next     : String_List_Id := Nil_String;
   end record;
   --  To hold values for string list variables and array elements.
   --  Component Flag may be used for various purposes. For source
   --  directories, it indicates if the directory contains Ada source(s).

   package String_Elements is new Table.Table
     (Table_Component_Type => String_Element,
      Table_Index_Type     => String_List_Id,
      Table_Low_Bound      => 1,
      Table_Initial        => 200,
      Table_Increment      => 100,
      Table_Name           => "Prj.String_Elements");
   --  The table for string elements in string lists

   type Variable_Kind is (Undefined, List, Single);
   --  Different kinds of variables

   subtype Defined_Variable_Kind is Variable_Kind range List .. Single;
   --  The defined kinds of variables

   Ignored : constant Variable_Kind := Single;
   --  Used to indicate that a package declaration must be ignored
   --  while processing the project tree (unknown package name).

   type Variable_Value (Kind : Variable_Kind := Undefined) is record
      Project  : Project_Id := No_Project;
      Location : Source_Ptr := No_Location;
      Default  : Boolean    := False;
      case Kind is
         when Undefined =>
            null;
         when List =>
            Values : String_List_Id := Nil_String;
         when Single =>
            Value : Name_Id := No_Name;
            Index : Int     := 0;
      end case;
   end record;
   --  Values for variables and array elements. Default is True if the
   --  current value is the default one for the variable

   Nil_Variable_Value : constant Variable_Value :=
     (Project  => No_Project,
      Kind     => Undefined,
      Location => No_Location,
      Default  => False);
   --  Value of a non existing variable or array element

   type Variable_Id is new Nat;
   No_Variable : constant Variable_Id := 0;
   type Variable is record
      Next     : Variable_Id := No_Variable;
      Name     : Name_Id;
      Value    : Variable_Value;
   end record;
   --  To hold the list of variables in a project file and in packages

   package Variable_Elements is new Table.Table
     (Table_Component_Type => Variable,
      Table_Index_Type     => Variable_Id,
      Table_Low_Bound      => 1,
      Table_Initial        => 200,
      Table_Increment      => 100,
      Table_Name           => "Prj.Variable_Elements");
   --  The table of variable in list of variables

   type Array_Element_Id is new Nat;
   No_Array_Element : constant Array_Element_Id := 0;
   type Array_Element is record
      Index                : Name_Id;
      Src_Index            : Int := 0;
      Index_Case_Sensitive : Boolean := True;
      Value                : Variable_Value;
      Next                 : Array_Element_Id := No_Array_Element;
   end record;
   --  Each Array_Element represents an array element and is linked (Next)
   --  to the next array element, if any, in the array.

   package Array_Elements is new Table.Table
     (Table_Component_Type => Array_Element,
      Table_Index_Type     => Array_Element_Id,
      Table_Low_Bound      => 1,
      Table_Initial        => 200,
      Table_Increment      => 100,
      Table_Name           => "Prj.Array_Elements");
   --  The table that contains all array elements

   type Array_Id is new Nat;
   No_Array : constant Array_Id := 0;
   type Array_Data is record
      Name  : Name_Id          := No_Name;
      Value : Array_Element_Id := No_Array_Element;
      Next  : Array_Id         := No_Array;
   end record;
   --  Each Array_Data value represents an array.
   --  Value is the id of the first element.
   --  Next is the id of the next array in the project file or package.

   package Arrays is new Table.Table
     (Table_Component_Type => Array_Data,
      Table_Index_Type     => Array_Id,
      Table_Low_Bound      => 1,
      Table_Initial        => 200,
      Table_Increment      => 100,
      Table_Name           => "Prj.Arrays");
   --  The table that contains all arrays

   type Package_Id is new Nat;
   No_Package : constant Package_Id := 0;
   type Declarations is record
      Variables  : Variable_Id := No_Variable;
      Attributes : Variable_Id := No_Variable;
      Arrays     : Array_Id    := No_Array;
      Packages   : Package_Id  := No_Package;
   end record;
   --  Contains the declarations (variables, single and array attributes,
   --  packages) for a project or a package in a project.

   No_Declarations : constant Declarations :=
     (Variables  => No_Variable,
      Attributes => No_Variable,
      Arrays     => No_Array,
      Packages   => No_Package);
   --  Default value of Declarations: indicates that there is no declarations.

   type Package_Element is record
      Name   : Name_Id      := No_Name;
      Decl   : Declarations := No_Declarations;
      Parent : Package_Id   := No_Package;
      Next   : Package_Id   := No_Package;
   end record;
   --  A package. Includes declarations that may include other packages.

   package Packages is new Table.Table
     (Table_Component_Type => Package_Element,
      Table_Index_Type     => Package_Id,
      Table_Low_Bound      => 1,
      Table_Initial        => 100,
      Table_Increment      => 100,
      Table_Name           => "Prj.Packages");
   --  The table that contains all packages.

   function Image (Casing : Casing_Type) return String;
   --  Similar to 'Image (but avoid use of this attribute in compiler)

   function Value (Image : String) return Casing_Type;
   --  Similar to 'Value (but avoid use of this attribute in compiler)
   --  Raises Constraint_Error if not a Casing_Type image.

   --  The following record contains data for a naming scheme

   type Naming_Data is record

      Dot_Replacement : Name_Id := No_Name;
      --  The string to replace '.' in the source file name (for Ada).

      Dot_Repl_Loc : Source_Ptr := No_Location;
      --  The position in the project file source where
      --  Dot_Replacement is defined.

      Casing : Casing_Type := All_Lower_Case;
      --  The casing of the source file name (for Ada).

      Spec_Suffix : Array_Element_Id := No_Array_Element;
      --  The string to append to the unit name for the
      --  source file name of a spec.
      --  Indexed by the programming language.

      Ada_Spec_Suffix : Name_Id := No_Name;
      --  The suffix of the Ada spec sources

      Spec_Suffix_Loc : Source_Ptr := No_Location;
      --  The position in the project file source where
      --  Ada_Spec_Suffix is defined.

      Impl_Suffixes    : Impl_Suffix_Array   := No_Impl_Suffixes;
      Supp_Suffixes    : Supp_Language_Index := No_Supp_Language_Index;
      --  The source suffixes of the different languages

      Body_Suffix : Array_Element_Id := No_Array_Element;
      --  The string to append to the unit name for the
      --  source file name of a body.
      --  Indexed by the programming language.

      Ada_Body_Suffix : Name_Id := No_Name;
      --  The suffix of the Ada body sources

      Body_Suffix_Loc : Source_Ptr := No_Location;
      --  The position in the project file source where
      --  Ada_Body_Suffix is defined.

      Separate_Suffix : Name_Id := No_Name;
      --  String to append to unit name for source file name of an Ada subunit.

      Sep_Suffix_Loc : Source_Ptr := No_Location;
      --  Position in the project file source where Separate_Suffix is defined.

      Specs : Array_Element_Id := No_Array_Element;
      --  An associative array mapping individual specs to source file names.
      --  This is specific to Ada.

      Bodies : Array_Element_Id := No_Array_Element;
      --  An associative array mapping individual bodies to source file names.
      --  This is specific to Ada.

      Specification_Exceptions : Array_Element_Id := No_Array_Element;
      --  An associative array listing spec file names that do not have the
      --  spec suffix. Not used by Ada. Indexed by programming language name.

      Implementation_Exceptions : Array_Element_Id := No_Array_Element;
      --  An associative array listing body file names that do not have the
      --  body suffix. Not used by Ada. Indexed by programming language name.

   end record;

   function Standard_Naming_Data return Naming_Data;
   pragma Inline (Standard_Naming_Data);
   --  The standard GNAT naming scheme

   function Same_Naming_Scheme
     (Left, Right : Naming_Data) return Boolean;
   --  Returns True if Left and Right are the same naming scheme
   --  not considering Specs and Bodies.

   type Project_List is new Nat;
   Empty_Project_List : constant Project_List := 0;
   --  A list of project files

   type Project_Element is record
      Project : Project_Id   := No_Project;
      Next    : Project_List := Empty_Project_List;
   end record;
   --  Element in a list of project files. Next is the id of the next
   --  project file in the list.

   package Project_Lists is new Table.Table
     (Table_Component_Type => Project_Element,
      Table_Index_Type     => Project_List,
      Table_Low_Bound      => 1,
      Table_Initial        => 100,
      Table_Increment      => 100,
      Table_Name           => "Prj.Project_Lists");
   --  The table that contains the lists of project files

   --  The following record describes a project file representation

   type Project_Data is record
      Externally_Built : Boolean := False;

      Languages      : Languages_In_Project := No_Languages;
      Supp_Languages : Supp_Language_Index  := No_Supp_Language_Index;
      --  Indicate the different languages of the source of this project

      First_Referred_By  : Project_Id := No_Project;
      --  The project, if any, that was the first to be known
      --  as importing or extending this project.
      --  Set by Prj.Proc.Process.

      Name : Name_Id := No_Name;
      --  The name of the project. Set by Prj.Proc.Process.

      Path_Name : Name_Id := No_Name;
      --  The path name of the project file. Set by Prj.Proc.Process.

      Display_Path_Name : Name_Id := No_Name;
      --  The path name used for display purposes. May be different from
      --  Path_Name for platforms where the file names are case-insensitive.

      Virtual : Boolean := False;
      --  True for virtual extending projects

      Location : Source_Ptr := No_Location;
      --  The location in the project file source of the reserved word
      --  project. Set by Prj.Proc.Process.

      Mains : String_List_Id := Nil_String;
      --  List of mains specified by attribute Main. Set by Prj.Nmsc.Check.

      Directory : Name_Id := No_Name;
      --  Directory where the project file resides. Set by Prj.Proc.Process.

      Display_Directory : Name_Id := No_Name;

      Dir_Path : String_Access;
      --  Same as Directory, but as an access to String.
      --  Set by Make.Compile_Sources.Collect_Arguments_And_Compile.

      Library : Boolean := False;
      --  True if this is a library project.
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Library_Dir : Name_Id := No_Name;
      --  If a library project, directory where resides the library
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Display_Library_Dir : Name_Id := No_Name;
      --  The name of the library directory, for display purposes.
      --  May be different from Library_Dir for platforms where the file names
      --  are case-insensitive.

      Library_Src_Dir : Name_Id := No_Name;
      --  If a library project, directory where the sources and the ALI files
      --  of the library are copied. By default, if attribute Library_Src_Dir
      --  is not specified, sources are not copied anywhere and ALI files are
      --  copied in the Library Directory.
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Display_Library_Src_Dir : Name_Id := No_Name;
      --  The name of the library source directory, for display purposes.
      --  May be different from Library_Src_Dir for platforms where the file
      --  names are case-insensitive.

      Library_Name : Name_Id := No_Name;
      --  If a library project, name of the library
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Library_Kind : Lib_Kind := Static;
      --  If a library project, kind of library
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Lib_Internal_Name : Name_Id := No_Name;
      --  If a library project, internal name store inside the library
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Standalone_Library : Boolean := False;
      --  Indicate that this is a Standalone Library Project File.
      --  Set by Prj.Nmsc.Check.

      Lib_Interface_ALIs : String_List_Id := Nil_String;
      --  For Standalone Library Project Files, indicate the list
      --  of Interface ALI files. Set by Prj.Nmsc.Check.

      Lib_Auto_Init : Boolean := False;
      --  For non static Standalone Library Project Files, indicate if
      --  the library initialisation should be automatic.

      Symbol_Data : Symbol_Record := No_Symbols;
      --  Symbol file name, reference symbol file name, symbol policy

      Ada_Sources_Present : Boolean := True;
      --  A flag that indicates if there are Ada sources in this project file.
      --  There are no sources if any of the following is true:
      --    1) Source_Dirs is specified as an empty list
      --    2) Source_Files is specified as an empty list
      --    3) Ada is not in the list of the specified Languages

      Other_Sources_Present : Boolean := True;
      --  A flag that indicates that there are non-Ada sources in this project

      Sources : String_List_Id := Nil_String;
      --  The list of all the source file names. Set by
      --  Prj.Nmsc.Check_Ada_Naming_Scheme.

      First_Other_Source : Other_Source_Id := No_Other_Source;
      Last_Other_Source  : Other_Source_Id := No_Other_Source;
      --  Head and tail of the list of sources of languages other than Ada

      Imported_Directories_Switches : Argument_List_Access := null;
      --  List of the -I switches to be used when compiling sources of
      --  languages other than Ada.

      Include_Path : String_Access := null;
      --  Value to be used as CPATH, when using a GCC, instead of a list of
      --  -I switches.

      Include_Data_Set : Boolean := False;
      --  Set True when Imported_Directories_Switches or Include_Path are set

      Source_Dirs : String_List_Id := Nil_String;
      --  The list of all the source directories.
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Known_Order_Of_Source_Dirs : Boolean := True;
      --  False, if there is any /** in the Source_Dirs, because in this case
      --  the ordering of the source subdirs depend on the OS. If True,
      --  duplicate file names in the same project file are allowed.

      Object_Directory : Name_Id := No_Name;
      --  The object directory of this project file.
      --  Set by Prj.Nmsc.Language_Independent_Check.

      Display_Object_Dir : Name_Id := No_Name;
      --  The name of the object directory, for display purposes.
      --  May be different from Object_Directory for platforms where the file
      --  names are case-insensitive.

      Exec_Directory : Name_Id := No_Name;
      --  The exec directory of this project file. Default is equal to
      --  Object_Directory. Set by Prj.Nmsc.Language_Independent_Check.

      Display_Exec_Dir : Name_Id := No_Name;
      --  The name of the exec directory, for display purposes.
      --  May be different from Exec_Directory for platforms where the file
      --  names are case-insensitive.

      Extends : Project_Id := No_Project;
      --  The reference of the project file, if any, that this
      --  project file extends. Set by Prj.Proc.Process.

      Extended_By : Project_Id := No_Project;
      --  The reference of the project file, if any, that
      --  extends this project file. Set by Prj.Proc.Process.

      Naming : Naming_Data := Standard_Naming_Data;
      --  The naming scheme of this project file.
      --  Set by Prj.Nmsc.Check_Naming_Scheme.

      First_Language_Processing : First_Language_Processing_Data :=
        Default_First_Language_Processing_Data;

      Supp_Language_Processing      : Supp_Language_Index :=
                                       No_Supp_Language_Index;

      Default_Linker                : Name_Id := No_Name;
      Default_Linker_Path           : Name_Id := No_Name;

      Decl : Declarations := No_Declarations;
      --  The declarations (variables, attributes and packages) of this
      --  project file. Set by Prj.Proc.Process.

      Imported_Projects : Project_List := Empty_Project_List;
      --  The list of all directly imported projects, if any.
      --  Set by Prj.Proc.Process.

      Ada_Include_Path : String_Access := null;
      --  The cached value of ADA_INCLUDE_PATH for this project file.
      --  Do not use this field directly outside of the compiler, use
      --  Prj.Env.Ada_Include_Path instead. Set by Prj.Env.Ada_Include_Path.

      Ada_Objects_Path : String_Access := null;
      --  The cached value of ADA_OBJECTS_PATH for this project file.
      --  Do not use this field directly outside of the compiler, use
      --  Prj.Env.Ada_Objects_Path instead. Set by Prj.Env.Ada_Objects_Path

      Include_Path_File : Name_Id := No_Name;
      --  The cached value of the source path temp file for this project file.
      --  Set by gnatmake (Prj.Env.Set_Ada_Paths).

      Objects_Path_File_With_Libs : Name_Id := No_Name;
      --  The cached value of the object path temp file (including library
      --  dirs) for this project file. Set by gnatmake (Prj.Env.Set_Ada_Paths).

      Objects_Path_File_Without_Libs : Name_Id := No_Name;
      --  The cached value of the object path temp file (excluding library
      --  dirs) for this project file. Set by gnatmake (Prj.Env.Set_Ada_Paths).

      Config_File_Name : Name_Id := No_Name;
      --  The name of the configuration pragmas file, if any.
      --  Set by gnatmake (Prj.Env.Create_Config_Pragmas_File).

      Config_File_Temp : Boolean := False;
      --  An indication that the configuration pragmas file is
      --  a temporary file that must be deleted at the end.
      --  Set by gnatmake (Prj.Env.Create_Config_Pragmas_File).

      Config_Checked : Boolean := False;
      --  A flag to avoid checking repetitively the configuration pragmas file.
      --  Set by gnatmake (Prj.Env.Create_Config_Pragmas_File).

      Language_Independent_Checked : Boolean := False;
      --  A flag that indicates that the project file has been checked
      --  for language independent features: Object_Directory,
      --  Source_Directories, Library, non empty Naming Suffixes.

      Checked : Boolean := False;
      --  A flag to avoid checking repetitively the naming scheme of
      --  this project file. Set by Prj.Nmsc.Check_Ada_Naming_Scheme.

      Seen                           : Boolean := False;
      --  A flag to mark a project as "visited" to avoid processing the same
      --  project several time.

      Need_To_Build_Lib : Boolean := False;
      --  Indicates that the library of a Library Project needs to be built or
      --  rebuilt.

      Depth : Natural := 0;
      --  The maximum depth of a project in the project graph.
      --  Depth of main project is 0.

      Unkept_Comments : Boolean := False;
      --  True if there are comments in the project sources that cannot
      --  be kept in the project tree.

   end record;

   function Is_Present
     (Language   : Language_Index;
      In_Project : Project_Data) return Boolean;
   --  Return True when Language is one of the languages used in
   --  project Project.

   procedure Set
     (Language   : Language_Index;
      Present    : Boolean;
      In_Project : in out Project_Data);
   --  Indicate if Language is or not a language used in project Project

   function Language_Processing_Data_Of
     (Language   : Language_Index;
      In_Project : Project_Data) return Language_Processing_Data;
   --  Return the Language_Processing_Data for language Language in project
   --  In_Project. Return the default when no Language_Processing_Data are
   --  defined for the language.

   procedure Set
     (Language_Processing : Language_Processing_Data;
      For_Language        : Language_Index;
      In_Project          : in out Project_Data);
   --  Set the Language_Processing_Data for language Language in project
   --  In_Project.

   function Suffix_Of
     (Language   : Language_Index;
      In_Project : Project_Data) return Name_Id;
   --  Return the suffix for language Language in project In_Project. Return
   --  No_Name when no suffix is defined for the language.

   procedure Set
     (Suffix       : Name_Id;
      For_Language : Language_Index;
      In_Project   : in out Project_Data);
   --  Set the suffix for language Language in project In_Project

   Project_Error : exception;
   --  Raised by some subprograms in Prj.Attr.

   function Empty_Project return Project_Data;
   --  Return the representation of an empty project

   package Projects is new Table.Table (
     Table_Component_Type => Project_Data,
     Table_Index_Type     => Project_Id,
     Table_Low_Bound      => 1,
     Table_Initial        => 100,
     Table_Increment      => 100,
     Table_Name           => "Prj.Projects");
   --  The set of all project files

   type Put_Line_Access is access procedure
     (Line    : String;
      Project : Project_Id);
   --  Use to customize error reporting in Prj.Proc and Prj.Nmsc

   procedure Expect (The_Token : Token_Type; Token_Image : String);
   --  Check that the current token is The_Token. If it is not, then
   --  output an error message.

   procedure Initialize;
   --  This procedure must be called before using any services from the Prj
   --  hierarchy. Namet.Initialize must be called before Prj.Initialize.

   procedure Reset;
   --  This procedure resets all the tables that are used when processing a
   --  project file tree. Initialize must be called before the call to Reset.

   procedure Register_Default_Naming_Scheme
     (Language            : Name_Id;
      Default_Spec_Suffix : Name_Id;
      Default_Body_Suffix : Name_Id);
   --  Register the default suffixes for a given language. These extensions
   --  will be ignored if the user has specified a new naming scheme in a
   --  project file.
   --
   --  Otherwise, this information will be automatically added to Naming_Data
   --  when a project is processed, in the lists Spec_Suffix and Body_Suffix.

   generic
      type State is limited private;
      with procedure Action
        (Project    : Project_Id;
         With_State : in out State);
   procedure For_Every_Project_Imported
     (By         : Project_Id;
      With_State : in out State);
   --  Call Action for each project imported directly or indirectly by project
   --  By. Action is called according to the order of importation: if A
   --  imports B, directly or indirectly, Action will be called for A before
   --  it is called for B. With_State may be used by Action to choose a
   --  behavior or to report some global result.

private

   Initial_Buffer_Size : constant := 100;
   --  Initial size for extensible buffer used below

   Buffer : String_Access := new String (1 .. Initial_Buffer_Size);
   --  An extensible character buffer to store names. Used in Prj.Part and
   --  Prj.Strt.

   Buffer_Last : Natural := 0;
   --  The index of the last character in the Buffer

   Current_Packages_To_Check : String_List_Access := All_Packages;
   --  Global variable, set by Prj.Part.Parse, used by Prj.Dect.

   procedure Add_To_Buffer (S : String);
   --  Append a String to the Buffer

end Prj;