gcc/ada/prj-tree.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              P R J . T R E E                             --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2001-2008, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  This package defines the structure of the Project File tree
  27
  28 with GNAT.Dynamic_HTables;
  29 with GNAT.Dynamic_Tables;
  30
  31 with Table;
  32
  33 with Prj.Attr; use Prj.Attr;
  34
  35 package Prj.Tree is
  36
  37    type Project_Node_Tree_Data;
  38    type Project_Node_Tree_Ref is access all Project_Node_Tree_Data;
  39    --  Type to designate a project node tree, so that several project node
  40    --  trees can coexist in memory.
  41
  42    Project_Nodes_Initial   : constant := 1_000;
  43    Project_Nodes_Increment : constant := 100;
  44    --  Allocation parameters for initializing and extending number
  45    --  of nodes in table Tree_Private_Part.Project_Nodes
  46
  47    Project_Node_Low_Bound  : constant := 0;
  48    Project_Node_High_Bound : constant := 099_999_999;
  49    --  Range of values for project node id's (in practice infinite)
  50
  51    type Project_Node_Id is range
  52      Project_Node_Low_Bound .. Project_Node_High_Bound;
  53    --  The index of table Tree_Private_Part.Project_Nodes
  54
  55    Empty_Node : constant Project_Node_Id := Project_Node_Low_Bound;
  56    --  Designates no node in table Project_Nodes
  57
  58    First_Node_Id : constant Project_Node_Id := Project_Node_Low_Bound + 1;
  59
  60    subtype Variable_Node_Id is Project_Node_Id;
  61    --  Used to designate a node whose expected kind is one of
  62    --  N_Typed_Variable_Declaration, N_Variable_Declaration or
  63    --  N_Variable_Reference.
  64
  65    subtype Package_Declaration_Id is Project_Node_Id;
  66    --  Used to designate a node whose expected kind is N_Project_Declaration
  67
  68    type Project_Node_Kind is
  69      (N_Project,
  70       N_With_Clause,
  71       N_Project_Declaration,
  72       N_Declarative_Item,
  73       N_Package_Declaration,
  74       N_String_Type_Declaration,
  75       N_Literal_String,
  76       N_Attribute_Declaration,
  77       N_Typed_Variable_Declaration,
  78       N_Variable_Declaration,
  79       N_Expression,
  80       N_Term,
  81       N_Literal_String_List,
  82       N_Variable_Reference,
  83       N_External_Value,
  84       N_Attribute_Reference,
  85       N_Case_Construction,
  86       N_Case_Item,
  87       N_Comment_Zones,
  88       N_Comment);
  89    --  Each node in the tree is of a Project_Node_Kind. For the signification
  90    --  of the fields in each node of Project_Node_Kind, look at package
  91    --  Tree_Private_Part.
  92
  93    function Present (Node : Project_Node_Id) return Boolean;
  94    pragma Inline (Present);
  95    --  Return True iff Node /= Empty_Node
  96
  97    function No (Node : Project_Node_Id) return Boolean;
  98    pragma Inline (No);
  99    --  Return True iff Node = Empty_Node
 100
 101    procedure Initialize (Tree : Project_Node_Tree_Ref);
 102    --  Initialize the Project File tree: empty the Project_Nodes table
 103    --  and reset the Projects_Htable.
 104
 105    function Default_Project_Node
 106      (In_Tree       : Project_Node_Tree_Ref;
 107       Of_Kind       : Project_Node_Kind;
 108       And_Expr_Kind : Variable_Kind := Undefined) return Project_Node_Id;
 109    --  Returns a Project_Node_Record with the specified Kind and Expr_Kind. All
 110    --  the other components have default nil values.
 111
 112    function Hash (N : Project_Node_Id) return Header_Num;
 113    --  Used for hash tables where the key is a Project_Node_Id
 114
 115    function Imported_Or_Extended_Project_Of
 116      (Project   : Project_Node_Id;
 117       In_Tree   : Project_Node_Tree_Ref;
 118       With_Name : Name_Id) return Project_Node_Id;
 119    --  Return the node of a project imported or extended by project Project and
 120    --  whose name is With_Name. Return Empty_Node if there is no such project.
 121
 122    --------------
 123    -- Comments --
 124    --------------
 125
 126    type Comment_State is private;
 127    --  A type to store the values of several global variables related to
 128    --  comments.
 129
 130    procedure Save (S : out Comment_State);
 131    --  Save in variable S the comment state. Called before scanning a new
 132    --  project file.
 133
 134    procedure Restore (S : Comment_State);
 135    --  Restore the comment state to a previously saved value. Called after
 136    --  scanning a project file.
 137
 138    procedure Reset_State;
 139    --  Set the comment state to its initial value. Called before scanning a
 140    --  new project file.
 141
 142    function There_Are_Unkept_Comments return Boolean;
 143    --  Indicates that some of the comments in a project file could not be
 144    --  stored in the parse tree.
 145
 146    procedure Set_Previous_Line_Node (To : Project_Node_Id);
 147    --  Indicate the node on the previous line. If there are comments
 148    --  immediately following this line, then they should be associated with
 149    --  this node.
 150
 151    procedure Set_Previous_End_Node (To : Project_Node_Id);
 152    --  Indicate that on the previous line the "end" belongs to node To.
 153    --  If there are comments immediately following this "end" line, they
 154    --  should be associated with this node.
 155
 156    procedure Set_End_Of_Line (To : Project_Node_Id);
 157    --  Indicate the node on the current line. If there is an end of line
 158    --  comment, then it should be associated with this node.
 159
 160    procedure Set_Next_End_Node (To : Project_Node_Id);
 161    --  Put node To on the top of the end node stack. When an END line is found
 162    --  with this node on the top of the end node stack, the comments, if any,
 163    --  immediately preceding this "end" line will be associated with this node.
 164
 165    procedure Remove_Next_End_Node;
 166    --  Remove the top of the end node stack
 167
 168    ------------------------
 169    -- Comment Processing --
 170    ------------------------
 171
 172    type Comment_Data is record
 173       Value                     : Name_Id := No_Name;
 174       Follows_Empty_Line        : Boolean := False;
 175       Is_Followed_By_Empty_Line : Boolean := False;
 176    end record;
 177    --  Component type for Comments Table below
 178
 179    package Comments is new Table.Table
 180      (Table_Component_Type => Comment_Data,
 181       Table_Index_Type     => Natural,
 182       Table_Low_Bound      => 1,
 183       Table_Initial        => 10,
 184       Table_Increment      => 100,
 185       Table_Name           => "Prj.Tree.Comments");
 186    --  A table to store the comments that may be stored is the tree
 187
 188    procedure Scan (In_Tree : Project_Node_Tree_Ref);
 189    --  Scan the tokens and accumulate comments
 190
 191    type Comment_Location is
 192      (Before, After, Before_End, After_End, End_Of_Line);
 193    --  Used in call to Add_Comments below
 194
 195    procedure Add_Comments
 196      (To      : Project_Node_Id;
 197       In_Tree : Project_Node_Tree_Ref;
 198       Where   : Comment_Location);
 199    --  Add comments to this node
 200
 201    ----------------------
 202    -- Access Functions --
 203    ----------------------
 204
 205    --  The following query functions are part of the abstract interface
 206    --  of the Project File tree. They provide access to fields of a project.
 207
 208    --  The access functions should be called only with valid arguments.
 209    --  For each function the condition of validity is specified. If an access
 210    --  function is called with invalid arguments, then exception
 211    --  Assertion_Error is raised if assertions are enabled, otherwise the
 212    --  behaviour is not defined and may result in a crash.
 213
 214    function Name_Of
 215      (Node    : Project_Node_Id;
 216       In_Tree : Project_Node_Tree_Ref) return Name_Id;
 217    pragma Inline (Name_Of);
 218    --  Valid for all non empty nodes. May return No_Name for nodes that have
 219    --  no names.
 220
 221    function Kind_Of
 222      (Node    : Project_Node_Id;
 223       In_Tree : Project_Node_Tree_Ref) return Project_Node_Kind;
 224    pragma Inline (Kind_Of);
 225    --  Valid for all non empty nodes
 226
 227    function Location_Of
 228      (Node    : Project_Node_Id;
 229       In_Tree : Project_Node_Tree_Ref) return Source_Ptr;
 230    pragma Inline (Location_Of);
 231    --  Valid for all non empty nodes
 232
 233    function First_Comment_After
 234      (Node    : Project_Node_Id;
 235       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 236    --  Valid only for N_Comment_Zones nodes
 237
 238    function First_Comment_After_End
 239      (Node    : Project_Node_Id;
 240       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 241    --  Valid only for N_Comment_Zones nodes
 242
 243    function First_Comment_Before
 244      (Node    : Project_Node_Id;
 245       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 246    --  Valid only for N_Comment_Zones nodes
 247
 248    function First_Comment_Before_End
 249      (Node    : Project_Node_Id;
 250       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 251    --  Valid only for N_Comment_Zones nodes
 252
 253    function Next_Comment
 254      (Node    : Project_Node_Id;
 255       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 256    --  Valid only for N_Comment nodes
 257
 258    function End_Of_Line_Comment
 259      (Node    : Project_Node_Id;
 260       In_Tree : Project_Node_Tree_Ref) return Name_Id;
 261    --  Valid only for non empty nodes
 262
 263    function Follows_Empty_Line
 264      (Node    : Project_Node_Id;
 265       In_Tree : Project_Node_Tree_Ref) return Boolean;
 266    --  Valid only for N_Comment nodes
 267
 268    function Is_Followed_By_Empty_Line
 269      (Node    : Project_Node_Id;
 270       In_Tree : Project_Node_Tree_Ref) return Boolean;
 271    --  Valid only for N_Comment nodes
 272
 273    function Parent_Project_Of
 274      (Node    : Project_Node_Id;
 275       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 276    pragma Inline (Parent_Project_Of);
 277    --  Valid only for N_Project nodes
 278
 279    function Project_File_Includes_Unkept_Comments
 280      (Node    : Project_Node_Id;
 281       In_Tree : Project_Node_Tree_Ref) return Boolean;
 282    --  Valid only for N_Project nodes
 283
 284    function Directory_Of
 285      (Node    : Project_Node_Id;
 286       In_Tree : Project_Node_Tree_Ref) return Path_Name_Type;
 287    pragma Inline (Directory_Of);
 288    --  Only valid for N_Project nodes
 289
 290    function Expression_Kind_Of
 291      (Node    : Project_Node_Id;
 292       In_Tree : Project_Node_Tree_Ref) return Variable_Kind;
 293    pragma Inline (Expression_Kind_Of);
 294    --  Only valid for N_Literal_String, N_Attribute_Declaration,
 295    --  N_Variable_Declaration, N_Typed_Variable_Declaration, N_Expression,
 296    --  N_Term, N_Variable_Reference or N_Attribute_Reference nodes.
 297
 298    function Is_Extending_All
 299      (Node    : Project_Node_Id;
 300       In_Tree : Project_Node_Tree_Ref) return Boolean;
 301    pragma Inline (Is_Extending_All);
 302    --  Only valid for N_Project and N_With_Clause
 303
 304    function Is_Not_Last_In_List
 305      (Node    : Project_Node_Id;
 306       In_Tree : Project_Node_Tree_Ref) return Boolean;
 307    pragma Inline (Is_Not_Last_In_List);
 308    --  Only valid for N_With_Clause
 309
 310    function First_Variable_Of
 311      (Node    : Project_Node_Id;
 312       In_Tree : Project_Node_Tree_Ref) return Variable_Node_Id;
 313    pragma Inline (First_Variable_Of);
 314    --  Only valid for N_Project or N_Package_Declaration nodes
 315
 316    function First_Package_Of
 317      (Node    : Project_Node_Id;
 318       In_Tree : Project_Node_Tree_Ref) return Package_Declaration_Id;
 319    pragma Inline (First_Package_Of);
 320    --  Only valid for N_Project nodes
 321
 322    function Package_Id_Of
 323      (Node    : Project_Node_Id;
 324       In_Tree : Project_Node_Tree_Ref) return Package_Node_Id;
 325    pragma Inline (Package_Id_Of);
 326    --  Only valid for N_Package_Declaration nodes
 327
 328    function Path_Name_Of
 329      (Node    : Project_Node_Id;
 330       In_Tree : Project_Node_Tree_Ref) return Path_Name_Type;
 331    pragma Inline (Path_Name_Of);
 332    --  Only valid for N_Project and N_With_Clause nodes
 333
 334    function String_Value_Of
 335      (Node    : Project_Node_Id;
 336       In_Tree : Project_Node_Tree_Ref) return Name_Id;
 337    pragma Inline (String_Value_Of);
 338    --  Only valid for N_With_Clause, N_Literal_String nodes or N_Comment.
 339    --  For a N_With_Clause created automatically for a virtual extending
 340    --  project, No_Name is returned.
 341
 342    function Source_Index_Of
 343      (Node    : Project_Node_Id;
 344       In_Tree : Project_Node_Tree_Ref) return Int;
 345    pragma Inline (Source_Index_Of);
 346    --  Only valid for N_Literal_String and N_Attribute_Declaration nodes
 347
 348    function First_With_Clause_Of
 349      (Node    : Project_Node_Id;
 350       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 351    pragma Inline (First_With_Clause_Of);
 352    --  Only valid for N_Project nodes
 353
 354    function Project_Declaration_Of
 355      (Node    : Project_Node_Id;
 356       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 357    pragma Inline (Project_Declaration_Of);
 358    --  Only valid for N_Project nodes
 359
 360    function Project_Qualifier_Of
 361      (Node    : Project_Node_Id;
 362       In_Tree : Project_Node_Tree_Ref) return Project_Qualifier;
 363    pragma Inline (Project_Qualifier_Of);
 364    --  Only valid for N_Project nodes
 365
 366    function Extending_Project_Of
 367      (Node    : Project_Node_Id;
 368       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 369    pragma Inline (Extending_Project_Of);
 370    --  Only valid for N_Project_Declaration nodes
 371
 372    function First_String_Type_Of
 373      (Node    : Project_Node_Id;
 374       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 375    pragma Inline (First_String_Type_Of);
 376    --  Only valid for N_Project nodes
 377
 378    function Extended_Project_Path_Of
 379      (Node    : Project_Node_Id;
 380       In_Tree : Project_Node_Tree_Ref) return Path_Name_Type;
 381    pragma Inline (Extended_Project_Path_Of);
 382    --  Only valid for N_With_Clause nodes
 383
 384    function Project_Node_Of
 385      (Node    : Project_Node_Id;
 386       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 387    pragma Inline (Project_Node_Of);
 388    --  Only valid for N_With_Clause, N_Variable_Reference and
 389    --  N_Attribute_Reference nodes.
 390
 391    function Non_Limited_Project_Node_Of
 392      (Node    : Project_Node_Id;
 393       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 394    pragma Inline (Non_Limited_Project_Node_Of);
 395    --  Only valid for N_With_Clause nodes. Returns Empty_Node for limited
 396    --  imported project files, otherwise returns the same result as
 397    --  Project_Node_Of.
 398
 399    function Next_With_Clause_Of
 400      (Node    : Project_Node_Id;
 401       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 402    pragma Inline (Next_With_Clause_Of);
 403    --  Only valid for N_With_Clause nodes
 404
 405    function First_Declarative_Item_Of
 406      (Node    : Project_Node_Id;
 407       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 408    pragma Inline (First_Declarative_Item_Of);
 409    --  Only valid for N_With_Clause nodes
 410
 411    function Extended_Project_Of
 412      (Node    : Project_Node_Id;
 413       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 414    pragma Inline (Extended_Project_Of);
 415    --  Only valid for N_Project_Declaration nodes
 416
 417    function Current_Item_Node
 418      (Node    : Project_Node_Id;
 419       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 420    pragma Inline (Current_Item_Node);
 421    --  Only valid for N_Declarative_Item nodes
 422
 423    function Next_Declarative_Item
 424      (Node    : Project_Node_Id;
 425       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 426    pragma Inline (Next_Declarative_Item);
 427    --  Only valid for N_Declarative_Item node
 428
 429    function Project_Of_Renamed_Package_Of
 430      (Node    : Project_Node_Id;
 431       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 432    pragma Inline (Project_Of_Renamed_Package_Of);
 433    --  Only valid for N_Package_Declaration nodes.
 434    --  May return Empty_Node.
 435
 436    function Next_Package_In_Project
 437      (Node    : Project_Node_Id;
 438       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 439    pragma Inline (Next_Package_In_Project);
 440    --  Only valid for N_Package_Declaration nodes
 441
 442    function First_Literal_String
 443      (Node    : Project_Node_Id;
 444       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 445    pragma Inline (First_Literal_String);
 446    --  Only valid for N_String_Type_Declaration nodes
 447
 448    function Next_String_Type
 449      (Node    : Project_Node_Id;
 450       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 451    pragma Inline (Next_String_Type);
 452    --  Only valid for N_String_Type_Declaration nodes
 453
 454    function Next_Literal_String
 455      (Node    : Project_Node_Id;
 456       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 457    pragma Inline (Next_Literal_String);
 458    --  Only valid for N_Literal_String nodes
 459
 460    function Expression_Of
 461      (Node    : Project_Node_Id;
 462       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 463    pragma Inline (Expression_Of);
 464    --  Only valid for N_Attribute_Declaration, N_Typed_Variable_Declaration
 465    --  or N_Variable_Declaration nodes
 466
 467    function Associative_Project_Of
 468      (Node    : Project_Node_Id;
 469       In_Tree : Project_Node_Tree_Ref)
 470       return  Project_Node_Id;
 471    pragma Inline (Associative_Project_Of);
 472    --  Only valid for N_Attribute_Declaration nodes
 473
 474    function Associative_Package_Of
 475      (Node    : Project_Node_Id;
 476       In_Tree : Project_Node_Tree_Ref)
 477       return  Project_Node_Id;
 478    pragma Inline (Associative_Package_Of);
 479    --  Only valid for N_Attribute_Declaration nodes
 480
 481    function Value_Is_Valid
 482      (For_Typed_Variable : Project_Node_Id;
 483       In_Tree            : Project_Node_Tree_Ref;
 484       Value              : Name_Id) return Boolean;
 485    pragma Inline (Value_Is_Valid);
 486    --  Only valid for N_Typed_Variable_Declaration. Returns True if Value is
 487    --  in the list of allowed strings for For_Typed_Variable. False otherwise.
 488
 489    function Associative_Array_Index_Of
 490      (Node    : Project_Node_Id;
 491       In_Tree : Project_Node_Tree_Ref) return Name_Id;
 492    pragma Inline (Associative_Array_Index_Of);
 493    --  Only valid for N_Attribute_Declaration and N_Attribute_Reference.
 494    --  Returns No_String for non associative array attributes.
 495
 496    function Next_Variable
 497      (Node    : Project_Node_Id;
 498       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 499    pragma Inline (Next_Variable);
 500    --  Only valid for N_Typed_Variable_Declaration or N_Variable_Declaration
 501    --  nodes.
 502
 503    function First_Term
 504      (Node    : Project_Node_Id;
 505       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 506    pragma Inline (First_Term);
 507    --  Only valid for N_Expression nodes
 508
 509    function Next_Expression_In_List
 510      (Node    : Project_Node_Id;
 511       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 512    pragma Inline (Next_Expression_In_List);
 513    --  Only valid for N_Expression nodes
 514
 515    function Current_Term
 516      (Node    : Project_Node_Id;
 517       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 518    pragma Inline (Current_Term);
 519    --  Only valid for N_Term nodes
 520
 521    function Next_Term
 522      (Node    : Project_Node_Id;
 523       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 524    pragma Inline (Next_Term);
 525    --  Only valid for N_Term nodes
 526
 527    function First_Expression_In_List
 528      (Node    : Project_Node_Id;
 529       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 530    pragma Inline (First_Expression_In_List);
 531    --  Only valid for N_Literal_String_List nodes
 532
 533    function Package_Node_Of
 534      (Node    : Project_Node_Id;
 535       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 536    pragma Inline (Package_Node_Of);
 537    --  Only valid for N_Variable_Reference or N_Attribute_Reference nodes.
 538    --  May return Empty_Node.
 539
 540    function String_Type_Of
 541      (Node    : Project_Node_Id;
 542       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 543    pragma Inline (String_Type_Of);
 544    --  Only valid for N_Variable_Reference or N_Typed_Variable_Declaration
 545    --  nodes.
 546
 547    function External_Reference_Of
 548      (Node    : Project_Node_Id;
 549       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 550    pragma Inline (External_Reference_Of);
 551    --  Only valid for N_External_Value nodes
 552
 553    function External_Default_Of
 554      (Node    : Project_Node_Id;
 555       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 556    pragma Inline (External_Default_Of);
 557    --  Only valid for N_External_Value nodes
 558
 559    function Case_Variable_Reference_Of
 560      (Node    : Project_Node_Id;
 561       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 562    pragma Inline (Case_Variable_Reference_Of);
 563    --  Only valid for N_Case_Construction nodes
 564
 565    function First_Case_Item_Of
 566      (Node    : Project_Node_Id;
 567       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 568    pragma Inline (First_Case_Item_Of);
 569    --  Only valid for N_Case_Construction nodes
 570
 571    function First_Choice_Of
 572      (Node    : Project_Node_Id;
 573       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 574    pragma Inline (First_Choice_Of);
 575    --  Return the first choice in a N_Case_Item, or Empty_Node if
 576    --  this is when others.
 577
 578    function Next_Case_Item
 579      (Node    : Project_Node_Id;
 580       In_Tree : Project_Node_Tree_Ref) return Project_Node_Id;
 581    pragma Inline (Next_Case_Item);
 582    --  Only valid for N_Case_Item nodes
 583
 584    function Case_Insensitive
 585      (Node    : Project_Node_Id;
 586       In_Tree : Project_Node_Tree_Ref) return Boolean;
 587    --  Only valid for N_Attribute_Declaration and N_Attribute_Reference nodes
 588
 589    --------------------
 590    -- Set Procedures --
 591    --------------------
 592
 593    --  The following procedures are part of the abstract interface of
 594    --  the Project File tree.
 595
 596    --  Each Set_* procedure is valid only for the same Project_Node_Kind
 597    --  nodes as the corresponding query function above.
 598
 599    procedure Set_Name_Of
 600      (Node    : Project_Node_Id;
 601       In_Tree : Project_Node_Tree_Ref;
 602       To      : Name_Id);
 603    pragma Inline (Set_Name_Of);
 604
 605    procedure Set_Kind_Of
 606      (Node    : Project_Node_Id;
 607       In_Tree : Project_Node_Tree_Ref;
 608       To      : Project_Node_Kind);
 609    pragma Inline (Set_Kind_Of);
 610
 611    procedure Set_Location_Of
 612      (Node    : Project_Node_Id;
 613       In_Tree : Project_Node_Tree_Ref;
 614       To      : Source_Ptr);
 615    pragma Inline (Set_Location_Of);
 616
 617    procedure Set_First_Comment_After
 618      (Node    : Project_Node_Id;
 619       In_Tree : Project_Node_Tree_Ref;
 620       To      : Project_Node_Id);
 621    pragma Inline (Set_First_Comment_After);
 622
 623    procedure Set_First_Comment_After_End
 624      (Node    : Project_Node_Id;
 625       In_Tree : Project_Node_Tree_Ref;
 626       To      : Project_Node_Id);
 627    pragma Inline (Set_First_Comment_After_End);
 628
 629    procedure Set_First_Comment_Before
 630      (Node    : Project_Node_Id;
 631       In_Tree : Project_Node_Tree_Ref;
 632       To      : Project_Node_Id);
 633    pragma Inline (Set_First_Comment_Before);
 634
 635    procedure Set_First_Comment_Before_End
 636      (Node    : Project_Node_Id;
 637       In_Tree : Project_Node_Tree_Ref;
 638       To      : Project_Node_Id);
 639    pragma Inline (Set_First_Comment_Before_End);
 640
 641    procedure Set_Next_Comment
 642      (Node    : Project_Node_Id;
 643       In_Tree : Project_Node_Tree_Ref;
 644       To      : Project_Node_Id);
 645    pragma Inline (Set_Next_Comment);
 646
 647    procedure Set_Parent_Project_Of
 648      (Node    : Project_Node_Id;
 649       In_Tree : Project_Node_Tree_Ref;
 650       To      : Project_Node_Id);
 651
 652    procedure Set_Project_File_Includes_Unkept_Comments
 653      (Node    : Project_Node_Id;
 654       In_Tree : Project_Node_Tree_Ref;
 655       To      : Boolean);
 656
 657    procedure Set_Directory_Of
 658      (Node    : Project_Node_Id;
 659       In_Tree : Project_Node_Tree_Ref;
 660       To      : Path_Name_Type);
 661    pragma Inline (Set_Directory_Of);
 662
 663    procedure Set_Expression_Kind_Of
 664      (Node    : Project_Node_Id;
 665       In_Tree : Project_Node_Tree_Ref;
 666       To      : Variable_Kind);
 667    pragma Inline (Set_Expression_Kind_Of);
 668
 669    procedure Set_Is_Extending_All
 670      (Node    : Project_Node_Id;
 671       In_Tree : Project_Node_Tree_Ref);
 672    pragma Inline (Set_Is_Extending_All);
 673
 674    procedure Set_Is_Not_Last_In_List
 675      (Node    : Project_Node_Id;
 676       In_Tree : Project_Node_Tree_Ref);
 677    pragma Inline (Set_Is_Not_Last_In_List);
 678
 679    procedure Set_First_Variable_Of
 680      (Node    : Project_Node_Id;
 681       In_Tree : Project_Node_Tree_Ref;
 682       To      : Variable_Node_Id);
 683    pragma Inline (Set_First_Variable_Of);
 684
 685    procedure Set_First_Package_Of
 686      (Node    : Project_Node_Id;
 687       In_Tree : Project_Node_Tree_Ref;
 688       To      : Package_Declaration_Id);
 689    pragma Inline (Set_First_Package_Of);
 690
 691    procedure Set_Package_Id_Of
 692      (Node    : Project_Node_Id;
 693       In_Tree : Project_Node_Tree_Ref;
 694       To      : Package_Node_Id);
 695    pragma Inline (Set_Package_Id_Of);
 696
 697    procedure Set_Path_Name_Of
 698      (Node    : Project_Node_Id;
 699       In_Tree : Project_Node_Tree_Ref;
 700       To      : Path_Name_Type);
 701    pragma Inline (Set_Path_Name_Of);
 702
 703    procedure Set_String_Value_Of
 704      (Node    : Project_Node_Id;
 705       In_Tree : Project_Node_Tree_Ref;
 706       To      : Name_Id);
 707    pragma Inline (Set_String_Value_Of);
 708
 709    procedure Set_First_With_Clause_Of
 710      (Node    : Project_Node_Id;
 711       In_Tree : Project_Node_Tree_Ref;
 712       To      : Project_Node_Id);
 713    pragma Inline (Set_First_With_Clause_Of);
 714
 715    procedure Set_Project_Declaration_Of
 716      (Node    : Project_Node_Id;
 717       In_Tree : Project_Node_Tree_Ref;
 718       To      : Project_Node_Id);
 719    pragma Inline (Set_Project_Declaration_Of);
 720
 721    procedure Set_Project_Qualifier_Of
 722      (Node    : Project_Node_Id;
 723       In_Tree : Project_Node_Tree_Ref;
 724       To      : Project_Qualifier);
 725    pragma Inline (Set_Project_Qualifier_Of);
 726
 727    procedure Set_Extending_Project_Of
 728      (Node    : Project_Node_Id;
 729       In_Tree : Project_Node_Tree_Ref;
 730       To      : Project_Node_Id);
 731    pragma Inline (Set_Extending_Project_Of);
 732
 733    procedure Set_First_String_Type_Of
 734      (Node    : Project_Node_Id;
 735       In_Tree : Project_Node_Tree_Ref;
 736       To      : Project_Node_Id);
 737    pragma Inline (Set_First_String_Type_Of);
 738
 739    procedure Set_Extended_Project_Path_Of
 740      (Node    : Project_Node_Id;
 741       In_Tree : Project_Node_Tree_Ref;
 742       To      : Path_Name_Type);
 743    pragma Inline (Set_Extended_Project_Path_Of);
 744
 745    procedure Set_Project_Node_Of
 746      (Node         : Project_Node_Id;
 747       In_Tree      : Project_Node_Tree_Ref;
 748       To           : Project_Node_Id;
 749       Limited_With : Boolean := False);
 750    pragma Inline (Set_Project_Node_Of);
 751
 752    procedure Set_Next_With_Clause_Of
 753      (Node    : Project_Node_Id;
 754       In_Tree : Project_Node_Tree_Ref;
 755       To      : Project_Node_Id);
 756    pragma Inline (Set_Next_With_Clause_Of);
 757
 758    procedure Set_First_Declarative_Item_Of
 759      (Node    : Project_Node_Id;
 760       In_Tree : Project_Node_Tree_Ref;
 761       To      : Project_Node_Id);
 762    pragma Inline (Set_First_Declarative_Item_Of);
 763
 764    procedure Set_Extended_Project_Of
 765      (Node    : Project_Node_Id;
 766       In_Tree : Project_Node_Tree_Ref;
 767       To      : Project_Node_Id);
 768    pragma Inline (Set_Extended_Project_Of);
 769
 770    procedure Set_Current_Item_Node
 771      (Node    : Project_Node_Id;
 772       In_Tree : Project_Node_Tree_Ref;
 773       To      : Project_Node_Id);
 774    pragma Inline (Set_Current_Item_Node);
 775
 776    procedure Set_Next_Declarative_Item
 777      (Node    : Project_Node_Id;
 778       In_Tree : Project_Node_Tree_Ref;
 779       To      : Project_Node_Id);
 780    pragma Inline (Set_Next_Declarative_Item);
 781
 782    procedure Set_Project_Of_Renamed_Package_Of
 783      (Node    : Project_Node_Id;
 784       In_Tree : Project_Node_Tree_Ref;
 785       To      : Project_Node_Id);
 786    pragma Inline (Set_Project_Of_Renamed_Package_Of);
 787
 788    procedure Set_Next_Package_In_Project
 789      (Node    : Project_Node_Id;
 790       In_Tree : Project_Node_Tree_Ref;
 791       To      : Project_Node_Id);
 792    pragma Inline (Set_Next_Package_In_Project);
 793
 794    procedure Set_First_Literal_String
 795      (Node    : Project_Node_Id;
 796       In_Tree : Project_Node_Tree_Ref;
 797       To      : Project_Node_Id);
 798    pragma Inline (Set_First_Literal_String);
 799
 800    procedure Set_Next_String_Type
 801      (Node    : Project_Node_Id;
 802       In_Tree : Project_Node_Tree_Ref;
 803       To      : Project_Node_Id);
 804    pragma Inline (Set_Next_String_Type);
 805
 806    procedure Set_Next_Literal_String
 807      (Node    : Project_Node_Id;
 808       In_Tree : Project_Node_Tree_Ref;
 809       To      : Project_Node_Id);
 810    pragma Inline (Set_Next_Literal_String);
 811
 812    procedure Set_Expression_Of
 813      (Node    : Project_Node_Id;
 814       In_Tree : Project_Node_Tree_Ref;
 815       To      : Project_Node_Id);
 816    pragma Inline (Set_Expression_Of);
 817
 818    procedure Set_Associative_Project_Of
 819      (Node    : Project_Node_Id;
 820       In_Tree : Project_Node_Tree_Ref;
 821       To      : Project_Node_Id);
 822    pragma Inline (Set_Associative_Project_Of);
 823
 824    procedure Set_Associative_Package_Of
 825      (Node    : Project_Node_Id;
 826       In_Tree : Project_Node_Tree_Ref;
 827       To      : Project_Node_Id);
 828    pragma Inline (Set_Associative_Package_Of);
 829
 830    procedure Set_Associative_Array_Index_Of
 831      (Node    : Project_Node_Id;
 832       In_Tree : Project_Node_Tree_Ref;
 833       To      : Name_Id);
 834    pragma Inline (Set_Associative_Array_Index_Of);
 835
 836    procedure Set_Next_Variable
 837      (Node    : Project_Node_Id;
 838       In_Tree : Project_Node_Tree_Ref;
 839       To      : Project_Node_Id);
 840    pragma Inline (Set_Next_Variable);
 841
 842    procedure Set_First_Term
 843      (Node    : Project_Node_Id;
 844       In_Tree : Project_Node_Tree_Ref;
 845       To      : Project_Node_Id);
 846    pragma Inline (Set_First_Term);
 847
 848    procedure Set_Next_Expression_In_List
 849      (Node    : Project_Node_Id;
 850       In_Tree : Project_Node_Tree_Ref;
 851       To      : Project_Node_Id);
 852    pragma Inline (Set_Next_Expression_In_List);
 853
 854    procedure Set_Current_Term
 855      (Node    : Project_Node_Id;
 856       In_Tree : Project_Node_Tree_Ref;
 857       To      : Project_Node_Id);
 858    pragma Inline (Set_Current_Term);
 859
 860    procedure Set_Next_Term
 861      (Node    : Project_Node_Id;
 862       In_Tree : Project_Node_Tree_Ref;
 863       To      : Project_Node_Id);
 864    pragma Inline (Set_Next_Term);
 865
 866    procedure Set_First_Expression_In_List
 867      (Node    : Project_Node_Id;
 868       In_Tree : Project_Node_Tree_Ref;
 869       To      : Project_Node_Id);
 870    pragma Inline (Set_First_Expression_In_List);
 871
 872    procedure Set_Package_Node_Of
 873      (Node    : Project_Node_Id;
 874       In_Tree : Project_Node_Tree_Ref;
 875       To      : Project_Node_Id);
 876    pragma Inline (Set_Package_Node_Of);
 877
 878    procedure Set_Source_Index_Of
 879      (Node    : Project_Node_Id;
 880       In_Tree : Project_Node_Tree_Ref;
 881       To      : Int);
 882    pragma Inline (Set_Source_Index_Of);
 883
 884    procedure Set_String_Type_Of
 885      (Node    : Project_Node_Id;
 886       In_Tree : Project_Node_Tree_Ref;
 887       To      : Project_Node_Id);
 888    pragma Inline (Set_String_Type_Of);
 889
 890    procedure Set_External_Reference_Of
 891      (Node    : Project_Node_Id;
 892       In_Tree : Project_Node_Tree_Ref;
 893       To      : Project_Node_Id);
 894    pragma Inline (Set_External_Reference_Of);
 895
 896    procedure Set_External_Default_Of
 897      (Node    : Project_Node_Id;
 898       In_Tree : Project_Node_Tree_Ref;
 899       To      : Project_Node_Id);
 900    pragma Inline (Set_External_Default_Of);
 901
 902    procedure Set_Case_Variable_Reference_Of
 903      (Node    : Project_Node_Id;
 904       In_Tree : Project_Node_Tree_Ref;
 905       To      : Project_Node_Id);
 906    pragma Inline (Set_Case_Variable_Reference_Of);
 907
 908    procedure Set_First_Case_Item_Of
 909      (Node    : Project_Node_Id;
 910       In_Tree : Project_Node_Tree_Ref;
 911       To      : Project_Node_Id);
 912    pragma Inline (Set_First_Case_Item_Of);
 913
 914    procedure Set_First_Choice_Of
 915      (Node    : Project_Node_Id;
 916       In_Tree : Project_Node_Tree_Ref;
 917       To      : Project_Node_Id);
 918    pragma Inline (Set_First_Choice_Of);
 919
 920    procedure Set_Next_Case_Item
 921      (Node    : Project_Node_Id;
 922       In_Tree : Project_Node_Tree_Ref;
 923       To      : Project_Node_Id);
 924    pragma Inline (Set_Next_Case_Item);
 925
 926    procedure Set_Case_Insensitive
 927      (Node    : Project_Node_Id;
 928       In_Tree : Project_Node_Tree_Ref;
 929       To      : Boolean);
 930
 931    -------------------------------
 932    -- Restricted Access Section --
 933    -------------------------------
 934
 935    package Tree_Private_Part is
 936
 937       --  This is conceptually in the private part
 938
 939       --  However, for efficiency, some packages are accessing it directly
 940
 941       type Project_Node_Record is record
 942
 943          Kind : Project_Node_Kind;
 944
 945          Qualifier : Project_Qualifier := Unspecified;
 946
 947          Location : Source_Ptr := No_Location;
 948
 949          Directory : Path_Name_Type := No_Path;
 950          --  Only for N_Project
 951
 952          Expr_Kind : Variable_Kind := Undefined;
 953          --  See below for what Project_Node_Kind it is used
 954
 955          Variables : Variable_Node_Id := Empty_Node;
 956          --  First variable in a project or a package
 957
 958          Packages : Package_Declaration_Id := Empty_Node;
 959          --  First package declaration in a project
 960
 961          Pkg_Id : Package_Node_Id := Empty_Package;
 962          --  Only used for N_Package_Declaration
 963          --  The component Pkg_Id is an entry into the table Package_Attributes
 964          --  (in Prj.Attr). It is used to indicate all the attributes of the
 965          --  package with their characteristics.
 966          --
 967          --  The tables Prj.Attr.Attributes and Prj.Attr.Package_Attributes
 968          --  are built once and for all through a call (from Prj.Initialize)
 969          --  to procedure Prj.Attr.Initialize. It is never modified after that.
 970
 971          Name : Name_Id := No_Name;
 972          --  See below for what Project_Node_Kind it is used
 973
 974          Src_Index : Int := 0;
 975          --  Index of a unit in a multi-unit source.
 976          --  Only for some N_Attribute_Declaration and N_Literal_String.
 977
 978          Path_Name : Path_Name_Type := No_Path;
 979          --  See below for what Project_Node_Kind it is used
 980
 981          Value : Name_Id := No_Name;
 982          --  See below for what Project_Node_Kind it is used
 983
 984          Field1 : Project_Node_Id := Empty_Node;
 985          --  See below the meaning for each Project_Node_Kind
 986
 987          Field2 : Project_Node_Id := Empty_Node;
 988          --  See below the meaning for each Project_Node_Kind
 989
 990          Field3 : Project_Node_Id := Empty_Node;
 991          --  See below the meaning for each Project_Node_Kind
 992
 993          Field4 : Project_Node_Id := Empty_Node;
 994          --  See below the meaning for each Project_Node_Kind
 995
 996          Flag1 : Boolean := False;
 997          --  This flag is significant only for:
 998          --    N_Attribute_Declaration and N_Attribute_Reference
 999          --      It indicates for an associative array attribute, that the
1000          --      index is case insensitive.
1001          --    N_Comment - it indicates that the comment is preceded by an
1002          --                empty line.
1003          --    N_Project - it indicates that there are comments in the project
1004          --                source that cannot be kept in the tree.
1005          --    N_Project_Declaration
1006          --              - it indicates that there are unkept comments in the
1007          --                project.
1008          --    N_With_Clause
1009          --              - it indicates that this is not the last with in a
1010          --                with clause. It is set for "A", but not for "B" in
1011          --                    with "B";
1012          --                  and
1013          --                    with "A", "B";
1014
1015          Flag2 : Boolean := False;
1016          --  This flag is significant only for:
1017          --    N_Project - it indicates that the project "extends all" another
1018          --                project.
1019          --    N_Comment - it indicates that the comment is followed by an
1020          --                empty line.
1021          --    N_With_Clause
1022          --              - it indicates that the originally imported project
1023          --                is an extending all project.
1024
1025          Comments : Project_Node_Id := Empty_Node;
1026          --  For nodes other that N_Comment_Zones or N_Comment, designates the
1027          --  comment zones associated with the node.
1028          --  for N_Comment_Zones, designates the comment after the "end" of
1029          --  the construct.
1030          --  For N_Comment, designates the next comment, if any.
1031
1032       end record;
1033
1034       --  type Project_Node_Kind is
1035
1036       --   (N_Project,
1037       --    --  Name:      project name
1038       --    --  Path_Name: project path name
1039       --    --  Expr_Kind: Undefined
1040       --    --  Field1:    first with clause
1041       --    --  Field2:    project declaration
1042       --    --  Field3:    first string type
1043       --    --  Field4:    parent project, if any
1044       --    --  Value:     extended project path name (if any)
1045
1046       --    N_With_Clause,
1047       --    --  Name:      imported project name
1048       --    --  Path_Name: imported project path name
1049       --    --  Expr_Kind: Undefined
1050       --    --  Field1:    project node
1051       --    --  Field2:    next with clause
1052       --    --  Field3:    project node or empty if "limited with"
1053       --    --  Field4:    not used
1054       --    --  Value:     literal string withed
1055
1056       --    N_Project_Declaration,
1057       --    --  Name:      not used
1058       --    --  Path_Name: not used
1059       --    --  Expr_Kind: Undefined
1060       --    --  Field1:    first declarative item
1061       --    --  Field2:    extended project
1062       --    --  Field3:    extending project
1063       --    --  Field4:    not used
1064       --    --  Value:     not used
1065
1066       --    N_Declarative_Item,
1067       --    --  Name:      not used
1068       --    --  Path_Name: not used
1069       --    --  Expr_Kind: Undefined
1070       --    --  Field1:    current item node
1071       --    --  Field2:    next declarative item
1072       --    --  Field3:    not used
1073       --    --  Field4:    not used
1074       --    --  Value:     not used
1075
1076       --    N_Package_Declaration,
1077       --    --  Name:      package name
1078       --    --  Path_Name: not used
1079       --    --  Expr_Kind: Undefined
1080       --    --  Field1:    project of renamed package (if any)
1081       --    --  Field2:    first declarative item
1082       --    --  Field3:    next package in project
1083       --    --  Field4:    not used
1084       --    --  Value:     not used
1085
1086       --    N_String_Type_Declaration,
1087       --    --  Name:      type name
1088       --    --  Path_Name: not used
1089       --    --  Expr_Kind: Undefined
1090       --    --  Field1:    first literal string
1091       --    --  Field2:    next string type
1092       --    --  Field3:    not used
1093       --    --  Field4:    not used
1094       --    --  Value:     not used
1095
1096       --    N_Literal_String,
1097       --    --  Name:      not used
1098       --    --  Path_Name: not used
1099       --    --  Expr_Kind: Single
1100       --    --  Field1:    next literal string
1101       --    --  Field2:    not used
1102       --    --  Field3:    not used
1103       --    --  Field4:    not used
1104       --    --  Value:     string value
1105
1106       --    N_Attribute_Declaration,
1107       --    --  Name:      attribute name
1108       --    --  Path_Name: not used
1109       --    --  Expr_Kind: attribute kind
1110       --    --  Field1:    expression
1111       --    --  Field2:    project of full associative array
1112       --    --  Field3:    package of full associative array
1113       --    --  Field4:    not used
1114       --    --  Value:     associative array index
1115       --    --             (if an associative array element)
1116
1117       --    N_Typed_Variable_Declaration,
1118       --    --  Name:      variable name
1119       --    --  Path_Name: not used
1120       --    --  Expr_Kind: Single
1121       --    --  Field1:    expression
1122       --    --  Field2:    type of variable (N_String_Type_Declaration)
1123       --    --  Field3:    next variable
1124       --    --  Field4:    not used
1125       --    --  Value:     not used
1126
1127       --    N_Variable_Declaration,
1128       --    --  Name:      variable name
1129       --    --  Path_Name: not used
1130       --    --  Expr_Kind: variable kind
1131       --    --  Field1:    expression
1132       --    --  Field2:    not used
1133       --    --             Field3 is used for next variable, instead of Field2,
1134       --    --             so that it is the same field for
1135       --    --             N_Variable_Declaration and
1136       --    --             N_Typed_Variable_Declaration
1137       --    --  Field3:    next variable
1138       --    --  Field4:    not used
1139       --    --  Value:     not used
1140
1141       --    N_Expression,
1142       --    --  Name:      not used
1143       --    --  Path_Name: not used
1144       --    --  Expr_Kind: expression kind
1145       --    --  Field1:    first term
1146       --    --  Field2:    next expression in list
1147       --    --  Field3:    not used
1148       --    --  Value:     not used
1149
1150       --    N_Term,
1151       --    --  Name:      not used
1152       --    --  Path_Name: not used
1153       --    --  Expr_Kind: term kind
1154       --    --  Field1:    current term
1155       --    --  Field2:    next term in the expression
1156       --    --  Field3:    not used
1157       --    --  Field4:    not used
1158       --    --  Value:     not used
1159
1160       --    N_Literal_String_List,
1161       --    --  Designates a list of string expressions between brackets
1162       --    --  separated by commas. The string expressions are not necessarily
1163       --    --  literal strings.
1164       --    --  Name:      not used
1165       --    --  Path_Name: not used
1166       --    --  Expr_Kind: List
1167       --    --  Field1:    first expression
1168       --    --  Field2:    not used
1169       --    --  Field3:    not used
1170       --    --  Field4:    not used
1171       --    --  Value:     not used
1172
1173       --    N_Variable_Reference,
1174       --    --  Name:      variable name
1175       --    --  Path_Name: not used
1176       --    --  Expr_Kind: variable kind
1177       --    --  Field1:    project (if specified)
1178       --    --  Field2:    package (if specified)
1179       --    --  Field3:    type of variable (N_String_Type_Declaration), if any
1180       --    --  Field4:    not used
1181       --    --  Value:     not used
1182
1183       --    N_External_Value,
1184       --    --  Name:      not used
1185       --    --  Path_Name: not used
1186       --    --  Expr_Kind: Single
1187       --    --  Field1:    Name of the external reference (literal string)
1188       --    --  Field2:    Default (literal string)
1189       --    --  Field3:    not used
1190       --    --  Value:     not used
1191
1192       --    N_Attribute_Reference,
1193       --    --  Name:      attribute name
1194       --    --  Path_Name: not used
1195       --    --  Expr_Kind: attribute kind
1196       --    --  Field1:    project
1197       --    --  Field2:    package (if attribute of a package)
1198       --    --  Field3:    not used
1199       --    --  Field4:    not used
1200       --    --  Value:     associative array index
1201       --    --             (if an associative array element)
1202
1203       --    N_Case_Construction,
1204       --    --  Name:      not used
1205       --    --  Path_Name: not used
1206       --    --  Expr_Kind: Undefined
1207       --    --  Field1:    case variable reference
1208       --    --  Field2:    first case item
1209       --    --  Field3:    not used
1210       --    --  Field4:    not used
1211       --    --  Value:     not used
1212
1213       --    N_Case_Item
1214       --    --  Name:      not used
1215       --    --  Path_Name: not used
1216       --    --  Expr_Kind: not used
1217       --    --  Field1:    first choice (literal string), or Empty_Node
1218       --    --             for when others
1219       --    --  Field2:    first declarative item
1220       --    --  Field3:    next case item
1221       --    --  Field4:    not used
1222       --    --  Value:     not used
1223
1224       --    N_Comment_zones
1225       --    --  Name:      not used
1226       --    --  Path_Name: not used
1227       --    --  Expr_Kind: not used
1228       --    --  Field1:    comment before the construct
1229       --    --  Field2:    comment after the construct
1230       --    --  Field3:    comment before the "end" of the construct
1231       --    --  Value:     end of line comment
1232       --    --  Field4:    not used
1233       --    --  Comments:  comment after the "end" of the construct
1234
1235       --    N_Comment
1236       --    --  Name:      not used
1237       --    --  Path_Name: not used
1238       --    --  Expr_Kind: not used
1239       --    --  Field1:    not used
1240       --    --  Field2:    not used
1241       --    --  Field3:    not used
1242       --    --  Field4:    not used
1243       --    --  Value:     comment
1244       --    --  Flag1:     comment is preceded by an empty line
1245       --    --  Flag2:     comment is followed by an empty line
1246       --    --  Comments:  next comment
1247
1248       package Project_Node_Table is
1249         new GNAT.Dynamic_Tables
1250           (Table_Component_Type => Project_Node_Record,
1251            Table_Index_Type     => Project_Node_Id,
1252            Table_Low_Bound      => First_Node_Id,
1253            Table_Initial        => Project_Nodes_Initial,
1254            Table_Increment      => Project_Nodes_Increment);
1255       --  This table contains the syntactic tree of project data
1256       --  from project files.
1257
1258       type Project_Name_And_Node is record
1259          Name : Name_Id;
1260          --  Name of the project
1261
1262          Node : Project_Node_Id;
1263          --  Node of the project in table Project_Nodes
1264
1265          Canonical_Path : Path_Name_Type;
1266          --  Resolved and canonical path of a real project file.
1267          --  No_Name in case of virtual projects.
1268
1269          Extended : Boolean;
1270          --  True when the project is being extended by another project
1271
1272          Proj_Qualifier : Project_Qualifier;
1273          --  The project qualifier of the project, if any
1274       end record;
1275
1276       No_Project_Name_And_Node : constant Project_Name_And_Node :=
1277         (Name           => No_Name,
1278          Node           => Empty_Node,
1279          Canonical_Path => No_Path,
1280          Extended       => True,
1281          Proj_Qualifier => Unspecified);
1282
1283       package Projects_Htable is new GNAT.Dynamic_HTables.Simple_HTable
1284         (Header_Num => Header_Num,
1285          Element    => Project_Name_And_Node,
1286          No_Element => No_Project_Name_And_Node,
1287          Key        => Name_Id,
1288          Hash       => Hash,
1289          Equal      => "=");
1290       --  This hash table contains a mapping of project names to project nodes.
1291       --  Note that this hash table contains only the nodes whose Kind is
1292       --  N_Project. It is used to find the node of a project from its name,
1293       --  and to verify if a project has already been parsed, knowing its name.
1294
1295    end Tree_Private_Part;
1296
1297    type Project_Node_Tree_Data is record
1298       Project_Nodes : Tree_Private_Part.Project_Node_Table.Instance;
1299       Projects_HT   : Tree_Private_Part.Projects_Htable.Instance;
1300    end record;
1301    --  The data for a project node tree
1302
1303 private
1304    type Comment_Array is array (Positive range <>) of Comment_Data;
1305    type Comments_Ptr is access Comment_Array;
1306
1307    type Comment_State is record
1308       End_Of_Line_Node   : Project_Node_Id := Empty_Node;
1309
1310       Previous_Line_Node : Project_Node_Id := Empty_Node;
1311
1312       Previous_End_Node  : Project_Node_Id := Empty_Node;
1313
1314       Unkept_Comments    : Boolean := False;
1315
1316       Comments           : Comments_Ptr := null;
1317    end record;
1318
1319 end Prj.Tree;