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[official-gcc.git] / gcc / ada / lib-xref.adb
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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- L I B . X R E F --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1998-2005, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
21 -- --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 -- --
25 ------------------------------------------------------------------------------
26
27 with Atree; use Atree;
28 with Csets; use Csets;
29 with Elists; use Elists;
30 with Errout; use Errout;
31 with Lib.Util; use Lib.Util;
32 with Namet; use Namet;
33 with Nlists; use Nlists;
34 with Opt; use Opt;
35 with Restrict; use Restrict;
36 with Rident; use Rident;
37 with Sem_Prag; use Sem_Prag;
38 with Sem_Util; use Sem_Util;
39 with Sinfo; use Sinfo;
40 with Sinput; use Sinput;
41 with Snames; use Snames;
42 with Stringt; use Stringt;
43 with Stand; use Stand;
44 with Table; use Table;
45 with Widechar; use Widechar;
46
47 with GNAT.Heap_Sort_A;
48
49 package body Lib.Xref is
50
51 ------------------
52 -- Declarations --
53 ------------------
54
55 -- The Xref table is used to record references. The Loc field is set
56 -- to No_Location for a definition entry.
57
58 subtype Xref_Entry_Number is Int;
59
60 type Xref_Entry is record
61 Ent : Entity_Id;
62 -- Entity referenced (E parameter to Generate_Reference)
63
64 Def : Source_Ptr;
65 -- Original source location for entity being referenced. Note that
66 -- these values are used only during the output process, they are
67 -- not set when the entries are originally built. This is because
68 -- private entities can be swapped when the initial call is made.
69
70 Loc : Source_Ptr;
71 -- Location of reference (Original_Location (Sloc field of N parameter
72 -- to Generate_Reference). Set to No_Location for the case of a
73 -- defining occurrence.
74
75 Typ : Character;
76 -- Reference type (Typ param to Generate_Reference)
77
78 Eun : Unit_Number_Type;
79 -- Unit number corresponding to Ent
80
81 Lun : Unit_Number_Type;
82 -- Unit number corresponding to Loc. Value is undefined and not
83 -- referenced if Loc is set to No_Location.
84
85 end record;
86
87 package Xrefs is new Table.Table (
88 Table_Component_Type => Xref_Entry,
89 Table_Index_Type => Xref_Entry_Number,
90 Table_Low_Bound => 1,
91 Table_Initial => Alloc.Xrefs_Initial,
92 Table_Increment => Alloc.Xrefs_Increment,
93 Table_Name => "Xrefs");
94
95 -------------------------
96 -- Generate_Definition --
97 -------------------------
98
99 procedure Generate_Definition (E : Entity_Id) is
100 Loc : Source_Ptr;
101 Indx : Nat;
102
103 begin
104 pragma Assert (Nkind (E) in N_Entity);
105
106 -- Note that we do not test Xref_Entity_Letters here. It is too
107 -- early to do so, since we are often called before the entity
108 -- is fully constructed, so that the Ekind is still E_Void.
109
110 if Opt.Xref_Active
111
112 -- Definition must come from source
113
114 and then Comes_From_Source (E)
115
116 -- And must have a reasonable source location that is not
117 -- within an instance (all entities in instances are ignored)
118
119 and then Sloc (E) > No_Location
120 and then Instantiation_Location (Sloc (E)) = No_Location
121
122 -- And must be a non-internal name from the main source unit
123
124 and then In_Extended_Main_Source_Unit (E)
125 and then not Is_Internal_Name (Chars (E))
126 then
127 Xrefs.Increment_Last;
128 Indx := Xrefs.Last;
129 Loc := Original_Location (Sloc (E));
130
131 Xrefs.Table (Indx).Ent := E;
132 Xrefs.Table (Indx).Loc := No_Location;
133 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
134 Xrefs.Table (Indx).Lun := No_Unit;
135 Set_Has_Xref_Entry (E);
136 end if;
137 end Generate_Definition;
138
139 ---------------------------------
140 -- Generate_Operator_Reference --
141 ---------------------------------
142
143 procedure Generate_Operator_Reference
144 (N : Node_Id;
145 T : Entity_Id)
146 is
147 begin
148 if not In_Extended_Main_Source_Unit (N) then
149 return;
150 end if;
151
152 -- If the operator is not a Standard operator, then we generate
153 -- a real reference to the user defined operator.
154
155 if Sloc (Entity (N)) /= Standard_Location then
156 Generate_Reference (Entity (N), N);
157
158 -- A reference to an implicit inequality operator is a also a
159 -- reference to the user-defined equality.
160
161 if Nkind (N) = N_Op_Ne
162 and then not Comes_From_Source (Entity (N))
163 and then Present (Corresponding_Equality (Entity (N)))
164 then
165 Generate_Reference (Corresponding_Equality (Entity (N)), N);
166 end if;
167
168 -- For the case of Standard operators, we mark the result type
169 -- as referenced. This ensures that in the case where we are
170 -- using a derived operator, we mark an entity of the unit that
171 -- implicitly defines this operator as used. Otherwise we may
172 -- think that no entity of the unit is used. The actual entity
173 -- marked as referenced is the first subtype, which is the user
174 -- defined entity that is relevant.
175
176 -- Note: we only do this for operators that come from source.
177 -- The generated code sometimes reaches for entities that do
178 -- not need to be explicitly visible (for example, when we
179 -- expand the code for comparing two record types, the fields
180 -- of the record may not be visible).
181
182 elsif Comes_From_Source (N) then
183 Set_Referenced (First_Subtype (T));
184 end if;
185 end Generate_Operator_Reference;
186
187 ------------------------
188 -- Generate_Reference --
189 ------------------------
190
191 procedure Generate_Reference
192 (E : Entity_Id;
193 N : Node_Id;
194 Typ : Character := 'r';
195 Set_Ref : Boolean := True;
196 Force : Boolean := False)
197 is
198 Indx : Nat;
199 Nod : Node_Id;
200 Ref : Source_Ptr;
201 Def : Source_Ptr;
202 Ent : Entity_Id;
203
204 function Is_On_LHS (Node : Node_Id) return Boolean;
205 -- Used to check if a node is on the left hand side of an
206 -- assignment. The following cases are handled:
207 --
208 -- Variable Node is a direct descendant of an assignment
209 -- statement.
210 --
211 -- Prefix Of an indexed or selected component that is
212 -- present in a subtree rooted by an assignment
213 -- statement. There is no restriction of nesting
214 -- of components, thus cases such as A.B(C).D are
215 -- handled properly.
216
217 ---------------
218 -- Is_On_LHS --
219 ---------------
220
221 -- Couldn't we use Is_Lvalue or whatever it is called ???
222
223 function Is_On_LHS (Node : Node_Id) return Boolean is
224 N : Node_Id := Node;
225
226 begin
227 -- Only identifiers are considered, is this necessary???
228
229 if Nkind (N) /= N_Identifier then
230 return False;
231 end if;
232
233 -- Reach the assignment statement subtree root. In the
234 -- case of a variable being a direct descendant of an
235 -- assignment statement, the loop is skiped.
236
237 while Nkind (Parent (N)) /= N_Assignment_Statement loop
238
239 -- Check whether the parent is a component and the
240 -- current node is its prefix.
241
242 if (Nkind (Parent (N)) = N_Selected_Component
243 or else
244 Nkind (Parent (N)) = N_Indexed_Component)
245 and then Prefix (Parent (N)) = N
246 then
247 N := Parent (N);
248 else
249 return False;
250 end if;
251 end loop;
252
253 -- Parent (N) is an assignment statement, check whether
254 -- N is its name.
255
256 return Name (Parent (N)) = N;
257 end Is_On_LHS;
258
259 -- Start of processing for Generate_Reference
260
261 begin
262 pragma Assert (Nkind (E) in N_Entity);
263
264 -- Check for obsolescent reference to ASCII
265
266 if E = Standard_ASCII then
267 Check_Restriction (No_Obsolescent_Features, N);
268 end if;
269
270 -- Warn if reference to Ada 2005 entity not in Ada 2005 mode
271
272 if Is_Ada_2005 (E) and then Ada_Version < Ada_05 then
273 Error_Msg_NE ("& is only defined in Ada 2005?", N, E);
274 end if;
275
276 -- Never collect references if not in main source unit. However,
277 -- we omit this test if Typ is 'e' or 'k', since these entries are
278 -- really structural, and it is useful to have them in units
279 -- that reference packages as well as units that define packages.
280 -- We also omit the test for the case of 'p' since we want to
281 -- include inherited primitive operations from other packages.
282
283 if not In_Extended_Main_Source_Unit (N)
284 and then Typ /= 'e'
285 and then Typ /= 'p'
286 and then Typ /= 'k'
287 then
288 return;
289 end if;
290
291 -- For reference type p, the entity must be in main source unit
292
293 if Typ = 'p' and then not In_Extended_Main_Source_Unit (E) then
294 return;
295 end if;
296
297 -- Unless the reference is forced, we ignore references where
298 -- the reference itself does not come from Source.
299
300 if not Force and then not Comes_From_Source (N) then
301 return;
302 end if;
303
304 -- Deal with setting entity as referenced, unless suppressed.
305 -- Note that we still do Set_Referenced on entities that do not
306 -- come from source. This situation arises when we have a source
307 -- reference to a derived operation, where the derived operation
308 -- itself does not come from source, but we still want to mark it
309 -- as referenced, since we really are referencing an entity in the
310 -- corresponding package (this avoids incorrect complaints that the
311 -- package contains no referenced entities).
312
313 if Set_Ref then
314
315 -- For a variable that appears on the left side of an
316 -- assignment statement, we set the Referenced_As_LHS
317 -- flag since this is indeed a left hand side.
318 -- We also set the Referenced_As_LHS flag of a prefix
319 -- of selected or indexed component.
320
321 if Ekind (E) = E_Variable
322 and then Is_On_LHS (N)
323 then
324 Set_Referenced_As_LHS (E);
325
326 -- Check for a reference in a pragma that should not count as a
327 -- making the variable referenced for warning purposes.
328
329 elsif Is_Non_Significant_Pragma_Reference (N) then
330 null;
331
332 -- A reference in an attribute definition clause does not
333 -- count as a reference except for the case of Address.
334 -- The reason that 'Address is an exception is that it
335 -- creates an alias through which the variable may be
336 -- referenced.
337
338 elsif Nkind (Parent (N)) = N_Attribute_Definition_Clause
339 and then Chars (Parent (N)) /= Name_Address
340 and then N = Name (Parent (N))
341 then
342 null;
343
344 -- Constant completion does not count as a reference
345
346 elsif Typ = 'c'
347 and then Ekind (E) = E_Constant
348 then
349 null;
350
351 -- Record representation clause does not count as a reference
352
353 elsif Nkind (N) = N_Identifier
354 and then Nkind (Parent (N)) = N_Record_Representation_Clause
355 then
356 null;
357
358 -- Discriminants do not need to produce a reference to record type
359
360 elsif Typ = 'd'
361 and then Nkind (Parent (N)) = N_Discriminant_Specification
362 then
363 null;
364
365 -- Any other occurrence counts as referencing the entity
366
367 else
368 Set_Referenced (E);
369 end if;
370
371 -- Check for pragma Unreferenced given and reference is within
372 -- this source unit (occasion for possible warning to be issued)
373
374 if Has_Pragma_Unreferenced (E)
375 and then In_Same_Extended_Unit (E, N)
376 then
377 -- A reference as a named parameter in a call does not count
378 -- as a violation of pragma Unreferenced for this purpose.
379
380 if Nkind (N) = N_Identifier
381 and then Nkind (Parent (N)) = N_Parameter_Association
382 and then Selector_Name (Parent (N)) = N
383 then
384 null;
385
386 -- Neither does a reference to a variable on the left side
387 -- of an assignment
388
389 elsif Ekind (E) = E_Variable
390 and then Nkind (Parent (N)) = N_Assignment_Statement
391 and then Name (Parent (N)) = N
392 then
393 null;
394
395 -- For entry formals, we want to place the warning on the
396 -- corresponding entity in the accept statement. The current
397 -- scope is the body of the accept, so we find the formal
398 -- whose name matches that of the entry formal (there is no
399 -- link between the two entities, and the one in the accept
400 -- statement is only used for conformance checking).
401
402 elsif Ekind (Scope (E)) = E_Entry then
403 declare
404 BE : Entity_Id;
405
406 begin
407 BE := First_Entity (Current_Scope);
408 while Present (BE) loop
409 if Chars (BE) = Chars (E) then
410 Error_Msg_NE
411 ("?pragma Unreferenced given for&", N, BE);
412 exit;
413 end if;
414
415 Next_Entity (BE);
416 end loop;
417 end;
418
419 -- Here we issue the warning, since this is a real reference
420
421 else
422 Error_Msg_NE ("?pragma Unreferenced given for&", N, E);
423 end if;
424 end if;
425
426 -- If this is a subprogram instance, mark as well the internal
427 -- subprogram in the wrapper package, which may be a visible
428 -- compilation unit.
429
430 if Is_Overloadable (E)
431 and then Is_Generic_Instance (E)
432 and then Present (Alias (E))
433 then
434 Set_Referenced (Alias (E));
435 end if;
436 end if;
437
438 -- Generate reference if all conditions are met:
439
440 if
441 -- Cross referencing must be active
442
443 Opt.Xref_Active
444
445 -- The entity must be one for which we collect references
446
447 and then Xref_Entity_Letters (Ekind (E)) /= ' '
448
449 -- Both Sloc values must be set to something sensible
450
451 and then Sloc (E) > No_Location
452 and then Sloc (N) > No_Location
453
454 -- We ignore references from within an instance
455
456 and then Instantiation_Location (Sloc (N)) = No_Location
457
458 -- Ignore dummy references
459
460 and then Typ /= ' '
461 then
462 if Nkind (N) = N_Identifier
463 or else
464 Nkind (N) = N_Defining_Identifier
465 or else
466 Nkind (N) in N_Op
467 or else
468 Nkind (N) = N_Defining_Operator_Symbol
469 or else
470 Nkind (N) = N_Operator_Symbol
471 or else
472 (Nkind (N) = N_Character_Literal
473 and then Sloc (Entity (N)) /= Standard_Location)
474 or else
475 Nkind (N) = N_Defining_Character_Literal
476 then
477 Nod := N;
478
479 elsif Nkind (N) = N_Expanded_Name
480 or else
481 Nkind (N) = N_Selected_Component
482 then
483 Nod := Selector_Name (N);
484
485 else
486 return;
487 end if;
488
489 -- Normal case of source entity comes from source
490
491 if Comes_From_Source (E) then
492 Ent := E;
493
494 -- Entity does not come from source, but is a derived subprogram
495 -- and the derived subprogram comes from source (after one or more
496 -- derivations) in which case the reference is to parent subprogram.
497
498 elsif Is_Overloadable (E)
499 and then Present (Alias (E))
500 then
501 Ent := Alias (E);
502
503 loop
504 if Comes_From_Source (Ent) then
505 exit;
506 elsif No (Alias (Ent)) then
507 return;
508 else
509 Ent := Alias (Ent);
510 end if;
511 end loop;
512
513 -- Record components of discriminated subtypes or derived types
514 -- must be treated as references to the original component.
515
516 elsif Ekind (E) = E_Component
517 and then Comes_From_Source (Original_Record_Component (E))
518 then
519 Ent := Original_Record_Component (E);
520
521 -- Ignore reference to any other entity that is not from source
522
523 else
524 return;
525 end if;
526
527 -- Record reference to entity
528
529 Ref := Original_Location (Sloc (Nod));
530 Def := Original_Location (Sloc (Ent));
531
532 Xrefs.Increment_Last;
533 Indx := Xrefs.Last;
534
535 Xrefs.Table (Indx).Loc := Ref;
536
537 -- Overriding operations are marked with 'P'.
538
539 if Typ = 'p'
540 and then Is_Subprogram (N)
541 and then Is_Overriding_Operation (N)
542 then
543 Xrefs.Table (Indx).Typ := 'P';
544 else
545 Xrefs.Table (Indx).Typ := Typ;
546 end if;
547
548 Xrefs.Table (Indx).Eun := Get_Source_Unit (Def);
549 Xrefs.Table (Indx).Lun := Get_Source_Unit (Ref);
550 Xrefs.Table (Indx).Ent := Ent;
551 Set_Has_Xref_Entry (Ent);
552 end if;
553 end Generate_Reference;
554
555 -----------------------------------
556 -- Generate_Reference_To_Formals --
557 -----------------------------------
558
559 procedure Generate_Reference_To_Formals (E : Entity_Id) is
560 Formal : Entity_Id;
561
562 begin
563 if Is_Generic_Subprogram (E) then
564 Formal := First_Entity (E);
565
566 while Present (Formal)
567 and then not Is_Formal (Formal)
568 loop
569 Next_Entity (Formal);
570 end loop;
571
572 else
573 Formal := First_Formal (E);
574 end if;
575
576 while Present (Formal) loop
577 if Ekind (Formal) = E_In_Parameter then
578
579 if Nkind (Parameter_Type (Parent (Formal)))
580 = N_Access_Definition
581 then
582 Generate_Reference (E, Formal, '^', False);
583 else
584 Generate_Reference (E, Formal, '>', False);
585 end if;
586
587 elsif Ekind (Formal) = E_In_Out_Parameter then
588 Generate_Reference (E, Formal, '=', False);
589
590 else
591 Generate_Reference (E, Formal, '<', False);
592 end if;
593
594 Next_Formal (Formal);
595 end loop;
596 end Generate_Reference_To_Formals;
597
598 -------------------------------------------
599 -- Generate_Reference_To_Generic_Formals --
600 -------------------------------------------
601
602 procedure Generate_Reference_To_Generic_Formals (E : Entity_Id) is
603 Formal : Entity_Id;
604
605 begin
606 Formal := First_Entity (E);
607
608 while Present (Formal) loop
609 if Comes_From_Source (Formal) then
610 Generate_Reference (E, Formal, 'z', False);
611 end if;
612
613 Next_Entity (Formal);
614 end loop;
615 end Generate_Reference_To_Generic_Formals;
616
617 ----------------
618 -- Initialize --
619 ----------------
620
621 procedure Initialize is
622 begin
623 Xrefs.Init;
624 end Initialize;
625
626 -----------------------
627 -- Output_References --
628 -----------------------
629
630 procedure Output_References is
631
632 procedure Get_Type_Reference
633 (Ent : Entity_Id;
634 Tref : out Entity_Id;
635 Left : out Character;
636 Right : out Character);
637 -- Given an entity id Ent, determines whether a type reference is
638 -- required. If so, Tref is set to the entity for the type reference
639 -- and Left and Right are set to the left/right brackets to be
640 -- output for the reference. If no type reference is required, then
641 -- Tref is set to Empty, and Left/Right are set to space.
642
643 procedure Output_Import_Export_Info (Ent : Entity_Id);
644 -- Ouput language and external name information for an interfaced
645 -- entity, using the format <language, external_name>,
646
647 ------------------------
648 -- Get_Type_Reference --
649 ------------------------
650
651 procedure Get_Type_Reference
652 (Ent : Entity_Id;
653 Tref : out Entity_Id;
654 Left : out Character;
655 Right : out Character)
656 is
657 Sav : Entity_Id;
658
659 begin
660 -- See if we have a type reference
661
662 Tref := Ent;
663 Left := '{';
664 Right := '}';
665
666 loop
667 Sav := Tref;
668
669 -- Processing for types
670
671 if Is_Type (Tref) then
672
673 -- Case of base type
674
675 if Base_Type (Tref) = Tref then
676
677 -- If derived, then get first subtype
678
679 if Tref /= Etype (Tref) then
680 Tref := First_Subtype (Etype (Tref));
681
682 -- Set brackets for derived type, but don't
683 -- override pointer case since the fact that
684 -- something is a pointer is more important
685
686 if Left /= '(' then
687 Left := '<';
688 Right := '>';
689 end if;
690
691 -- If non-derived ptr, get directly designated type.
692 -- If the type has a full view, all references are
693 -- on the partial view, that is seen first.
694
695 elsif Is_Access_Type (Tref) then
696 Tref := Directly_Designated_Type (Tref);
697 Left := '(';
698 Right := ')';
699
700 elsif Is_Private_Type (Tref)
701 and then Present (Full_View (Tref))
702 and then Is_Access_Type (Full_View (Tref))
703 then
704 Tref := Directly_Designated_Type (Full_View (Tref));
705 Left := '(';
706 Right := ')';
707
708 -- If non-derived array, get component type.
709 -- Skip component type for case of String
710 -- or Wide_String, saves worthwhile space.
711
712 elsif Is_Array_Type (Tref)
713 and then Tref /= Standard_String
714 and then Tref /= Standard_Wide_String
715 then
716 Tref := Component_Type (Tref);
717 Left := '(';
718 Right := ')';
719
720 -- For other non-derived base types, nothing
721
722 else
723 exit;
724 end if;
725
726 -- For a subtype, go to ancestor subtype.
727
728 else
729 Tref := Ancestor_Subtype (Tref);
730
731 -- If no ancestor subtype, go to base type
732
733 if No (Tref) then
734 Tref := Base_Type (Sav);
735 end if;
736 end if;
737
738 -- For objects, functions, enum literals,
739 -- just get type from Etype field.
740
741 elsif Is_Object (Tref)
742 or else Ekind (Tref) = E_Enumeration_Literal
743 or else Ekind (Tref) = E_Function
744 or else Ekind (Tref) = E_Operator
745 then
746 Tref := Etype (Tref);
747
748 -- For anything else, exit
749
750 else
751 exit;
752 end if;
753
754 -- Exit if no type reference, or we are stuck in
755 -- some loop trying to find the type reference, or
756 -- if the type is standard void type (the latter is
757 -- an implementation artifact that should not show
758 -- up in the generated cross-references).
759
760 exit when No (Tref)
761 or else Tref = Sav
762 or else Tref = Standard_Void_Type;
763
764 -- If we have a usable type reference, return, otherwise
765 -- keep looking for something useful (we are looking for
766 -- something that either comes from source or standard)
767
768 if Sloc (Tref) = Standard_Location
769 or else Comes_From_Source (Tref)
770 then
771 -- If the reference is a subtype created for a generic
772 -- actual, go to actual directly, the inner subtype is
773 -- not user visible.
774
775 if Nkind (Parent (Tref)) = N_Subtype_Declaration
776 and then not Comes_From_Source (Parent (Tref))
777 and then
778 (Is_Wrapper_Package (Scope (Tref))
779 or else Is_Generic_Instance (Scope (Tref)))
780 then
781 Tref := Base_Type (Tref);
782 end if;
783
784 return;
785 end if;
786 end loop;
787
788 -- If we fall through the loop, no type reference
789
790 Tref := Empty;
791 Left := ' ';
792 Right := ' ';
793 end Get_Type_Reference;
794
795 -------------------------------
796 -- Output_Import_Export_Info --
797 -------------------------------
798
799 procedure Output_Import_Export_Info (Ent : Entity_Id) is
800 Language_Name : Name_Id;
801 Conv : constant Convention_Id := Convention (Ent);
802 begin
803 if Conv = Convention_C then
804 Language_Name := Name_C;
805
806 elsif Conv = Convention_CPP then
807 Language_Name := Name_CPP;
808
809 elsif Conv = Convention_Ada then
810 Language_Name := Name_Ada;
811
812 else
813 -- These are the only languages that GPS knows about.
814
815 return;
816 end if;
817
818 Write_Info_Char ('<');
819 Get_Unqualified_Name_String (Language_Name);
820
821 for J in 1 .. Name_Len loop
822 Write_Info_Char (Name_Buffer (J));
823 end loop;
824
825 if Present (Interface_Name (Ent)) then
826 Write_Info_Char (',');
827 String_To_Name_Buffer (Strval (Interface_Name (Ent)));
828
829 for J in 1 .. Name_Len loop
830 Write_Info_Char (Name_Buffer (J));
831 end loop;
832 end if;
833
834 Write_Info_Char ('>');
835 end Output_Import_Export_Info;
836
837 -- Start of processing for Output_References
838
839 begin
840 if not Opt.Xref_Active then
841 return;
842 end if;
843
844 -- Before we go ahead and output the references we have a problem
845 -- that needs dealing with. So far we have captured things that are
846 -- definitely referenced by the main unit, or defined in the main
847 -- unit. That's because we don't want to clutter up the ali file
848 -- for this unit with definition lines for entities in other units
849 -- that are not referenced.
850
851 -- But there is a glitch. We may reference an entity in another unit,
852 -- and it may have a type reference to an entity that is not directly
853 -- referenced in the main unit, which may mean that there is no xref
854 -- entry for this entity yet in the list of references.
855
856 -- If we don't do something about this, we will end with an orphan
857 -- type reference, i.e. it will point to an entity that does not
858 -- appear within the generated references in the ali file. That is
859 -- not good for tools using the xref information.
860
861 -- To fix this, we go through the references adding definition
862 -- entries for any unreferenced entities that can be referenced
863 -- in a type reference. There is a recursion problem here, and
864 -- that is dealt with by making sure that this traversal also
865 -- traverses any entries that get added by the traversal.
866
867 declare
868 J : Nat;
869 Tref : Entity_Id;
870 L, R : Character;
871 Indx : Nat;
872 Ent : Entity_Id;
873 Loc : Source_Ptr;
874
875 begin
876 -- Note that this is not a for loop for a very good reason. The
877 -- processing of items in the table can add new items to the
878 -- table, and they must be processed as well
879
880 J := 1;
881 while J <= Xrefs.Last loop
882 Ent := Xrefs.Table (J).Ent;
883 Get_Type_Reference (Ent, Tref, L, R);
884
885 if Present (Tref)
886 and then not Has_Xref_Entry (Tref)
887 and then Sloc (Tref) > No_Location
888 then
889 Xrefs.Increment_Last;
890 Indx := Xrefs.Last;
891 Loc := Original_Location (Sloc (Tref));
892 Xrefs.Table (Indx).Ent := Tref;
893 Xrefs.Table (Indx).Loc := No_Location;
894 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
895 Xrefs.Table (Indx).Lun := No_Unit;
896 Set_Has_Xref_Entry (Tref);
897 end if;
898
899 -- Collect inherited primitive operations that may be
900 -- declared in another unit and have no visible reference
901 -- in the current one.
902
903 if Is_Type (Ent)
904 and then Is_Tagged_Type (Ent)
905 and then Is_Derived_Type (Ent)
906 and then Ent = Base_Type (Ent)
907 and then In_Extended_Main_Source_Unit (Ent)
908 then
909 declare
910 Op_List : constant Elist_Id := Primitive_Operations (Ent);
911 Op : Elmt_Id;
912 Prim : Entity_Id;
913
914 function Parent_Op (E : Entity_Id) return Entity_Id;
915 -- Find original operation, which may be inherited
916 -- through several derivations.
917
918 function Parent_Op (E : Entity_Id) return Entity_Id is
919 Orig_Op : constant Entity_Id := Alias (E);
920 begin
921 if No (Orig_Op) then
922 return Empty;
923 elsif not Comes_From_Source (E)
924 and then not Has_Xref_Entry (Orig_Op)
925 and then Comes_From_Source (Orig_Op)
926 then
927 return Orig_Op;
928 else
929 return Parent_Op (Orig_Op);
930 end if;
931 end Parent_Op;
932
933 begin
934 Op := First_Elmt (Op_List);
935 while Present (Op) loop
936 Prim := Parent_Op (Node (Op));
937
938 if Present (Prim) then
939 Xrefs.Increment_Last;
940 Indx := Xrefs.Last;
941 Loc := Original_Location (Sloc (Prim));
942 Xrefs.Table (Indx).Ent := Prim;
943 Xrefs.Table (Indx).Loc := No_Location;
944 Xrefs.Table (Indx).Eun :=
945 Get_Source_Unit (Sloc (Prim));
946 Xrefs.Table (Indx).Lun := No_Unit;
947 Set_Has_Xref_Entry (Prim);
948 end if;
949
950 Next_Elmt (Op);
951 end loop;
952 end;
953 end if;
954
955 J := J + 1;
956 end loop;
957 end;
958
959 -- Now we have all the references, including those for any embedded
960 -- type references, so we can sort them, and output them.
961
962 Output_Refs : declare
963
964 Nrefs : Nat := Xrefs.Last;
965 -- Number of references in table. This value may get reset
966 -- (reduced) when we eliminate duplicate reference entries.
967
968 Rnums : array (0 .. Nrefs) of Nat;
969 -- This array contains numbers of references in the Xrefs table.
970 -- This list is sorted in output order. The extra 0'th entry is
971 -- convenient for the call to sort. When we sort the table, we
972 -- move the entries in Rnums around, but we do not move the
973 -- original table entries.
974
975 Curxu : Unit_Number_Type;
976 -- Current xref unit
977
978 Curru : Unit_Number_Type;
979 -- Current reference unit for one entity
980
981 Cursrc : Source_Buffer_Ptr;
982 -- Current xref unit source text
983
984 Curent : Entity_Id;
985 -- Current entity
986
987 Curnam : String (1 .. Name_Buffer'Length);
988 Curlen : Natural;
989 -- Simple name and length of current entity
990
991 Curdef : Source_Ptr;
992 -- Original source location for current entity
993
994 Crloc : Source_Ptr;
995 -- Current reference location
996
997 Ctyp : Character;
998 -- Entity type character
999
1000 Tref : Entity_Id;
1001 -- Type reference
1002
1003 Rref : Node_Id;
1004 -- Renaming reference
1005
1006 Trunit : Unit_Number_Type;
1007 -- Unit number for type reference
1008
1009 function Lt (Op1, Op2 : Natural) return Boolean;
1010 -- Comparison function for Sort call
1011
1012 function Name_Change (X : Entity_Id) return Boolean;
1013 -- Determines if entity X has a different simple name from Curent
1014
1015 procedure Move (From : Natural; To : Natural);
1016 -- Move procedure for Sort call
1017
1018 --------
1019 -- Lt --
1020 --------
1021
1022 function Lt (Op1, Op2 : Natural) return Boolean is
1023 T1 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op1)));
1024 T2 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op2)));
1025
1026 begin
1027 -- First test. If entity is in different unit, sort by unit
1028
1029 if T1.Eun /= T2.Eun then
1030 return Dependency_Num (T1.Eun) < Dependency_Num (T2.Eun);
1031
1032 -- Second test, within same unit, sort by entity Sloc
1033
1034 elsif T1.Def /= T2.Def then
1035 return T1.Def < T2.Def;
1036
1037 -- Third test, sort definitions ahead of references
1038
1039 elsif T1.Loc = No_Location then
1040 return True;
1041
1042 elsif T2.Loc = No_Location then
1043 return False;
1044
1045 -- Fourth test, for same entity, sort by reference location unit
1046
1047 elsif T1.Lun /= T2.Lun then
1048 return Dependency_Num (T1.Lun) < Dependency_Num (T2.Lun);
1049
1050 -- Fifth test order of location within referencing unit
1051
1052 elsif T1.Loc /= T2.Loc then
1053 return T1.Loc < T2.Loc;
1054
1055 -- Finally, for two locations at the same address, we prefer
1056 -- the one that does NOT have the type 'r' so that a modification
1057 -- or extension takes preference, when there are more than one
1058 -- reference at the same location.
1059
1060 else
1061 return T2.Typ = 'r';
1062 end if;
1063 end Lt;
1064
1065 ----------
1066 -- Move --
1067 ----------
1068
1069 procedure Move (From : Natural; To : Natural) is
1070 begin
1071 Rnums (Nat (To)) := Rnums (Nat (From));
1072 end Move;
1073
1074 -----------------
1075 -- Name_Change --
1076 -----------------
1077
1078 function Name_Change (X : Entity_Id) return Boolean is
1079 begin
1080 Get_Unqualified_Name_String (Chars (X));
1081
1082 if Name_Len /= Curlen then
1083 return True;
1084
1085 else
1086 return Name_Buffer (1 .. Curlen) /= Curnam (1 .. Curlen);
1087 end if;
1088 end Name_Change;
1089
1090 -- Start of processing for Output_Refs
1091
1092 begin
1093 -- Capture the definition Sloc values. We delay doing this till now,
1094 -- since at the time the reference or definition is made, private
1095 -- types may be swapped, and the Sloc value may be incorrect. We
1096 -- also set up the pointer vector for the sort.
1097
1098 for J in 1 .. Nrefs loop
1099 Rnums (J) := J;
1100 Xrefs.Table (J).Def :=
1101 Original_Location (Sloc (Xrefs.Table (J).Ent));
1102 end loop;
1103
1104 -- Sort the references
1105
1106 GNAT.Heap_Sort_A.Sort
1107 (Integer (Nrefs),
1108 Move'Unrestricted_Access,
1109 Lt'Unrestricted_Access);
1110
1111 -- Eliminate duplicate entries
1112
1113 declare
1114 NR : constant Nat := Nrefs;
1115
1116 begin
1117 -- We need this test for NR because if we force ALI file
1118 -- generation in case of errors detected, it may be the case
1119 -- that Nrefs is 0, so we should not reset it here
1120
1121 if NR >= 2 then
1122 Nrefs := 1;
1123
1124 for J in 2 .. NR loop
1125 if Xrefs.Table (Rnums (J)) /=
1126 Xrefs.Table (Rnums (Nrefs))
1127 then
1128 Nrefs := Nrefs + 1;
1129 Rnums (Nrefs) := Rnums (J);
1130 end if;
1131 end loop;
1132 end if;
1133 end;
1134
1135 -- Initialize loop through references
1136
1137 Curxu := No_Unit;
1138 Curent := Empty;
1139 Curdef := No_Location;
1140 Curru := No_Unit;
1141 Crloc := No_Location;
1142
1143 -- Loop to output references
1144
1145 for Refno in 1 .. Nrefs loop
1146 Output_One_Ref : declare
1147 P2 : Source_Ptr;
1148 WC : Char_Code;
1149 Err : Boolean;
1150 Ent : Entity_Id;
1151
1152 XE : Xref_Entry renames Xrefs.Table (Rnums (Refno));
1153 -- The current entry to be accessed
1154
1155 P : Source_Ptr;
1156 -- Used to index into source buffer to get entity name
1157
1158 Left : Character;
1159 Right : Character;
1160 -- Used for {} or <> or () for type reference
1161
1162 procedure Output_Instantiation_Refs (Loc : Source_Ptr);
1163 -- Recursive procedure to output instantiation references for
1164 -- the given source ptr in [file|line[...]] form. No output
1165 -- if the given location is not a generic template reference.
1166
1167 -------------------------------
1168 -- Output_Instantiation_Refs --
1169 -------------------------------
1170
1171 procedure Output_Instantiation_Refs (Loc : Source_Ptr) is
1172 Iloc : constant Source_Ptr := Instantiation_Location (Loc);
1173 Lun : Unit_Number_Type;
1174 Cu : constant Unit_Number_Type := Curru;
1175
1176 begin
1177 -- Nothing to do if this is not an instantiation
1178
1179 if Iloc = No_Location then
1180 return;
1181 end if;
1182
1183 -- Output instantiation reference
1184
1185 Write_Info_Char ('[');
1186 Lun := Get_Source_Unit (Iloc);
1187
1188 if Lun /= Curru then
1189 Curru := Lun;
1190 Write_Info_Nat (Dependency_Num (Curru));
1191 Write_Info_Char ('|');
1192 end if;
1193
1194 Write_Info_Nat (Int (Get_Logical_Line_Number (Iloc)));
1195
1196 -- Recursive call to get nested instantiations
1197
1198 Output_Instantiation_Refs (Iloc);
1199
1200 -- Output final ] after call to get proper nesting
1201
1202 Write_Info_Char (']');
1203 Curru := Cu;
1204 return;
1205 end Output_Instantiation_Refs;
1206
1207 -- Start of processing for Output_One_Ref
1208
1209 begin
1210 Ent := XE.Ent;
1211 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1212
1213 -- Skip reference if it is the only reference to an entity,
1214 -- and it is an end-line reference, and the entity is not in
1215 -- the current extended source. This prevents junk entries
1216 -- consisting only of packages with end lines, where no
1217 -- entity from the package is actually referenced.
1218
1219 if XE.Typ = 'e'
1220 and then Ent /= Curent
1221 and then (Refno = Nrefs or else
1222 Ent /= Xrefs.Table (Rnums (Refno + 1)).Ent)
1223 and then
1224 not In_Extended_Main_Source_Unit (Ent)
1225 then
1226 goto Continue;
1227 end if;
1228
1229 -- For private type, get full view type
1230
1231 if Ctyp = '+'
1232 and then Present (Full_View (XE.Ent))
1233 then
1234 Ent := Underlying_Type (Ent);
1235
1236 if Present (Ent) then
1237 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1238 end if;
1239 end if;
1240
1241 -- Special exception for Boolean
1242
1243 if Ctyp = 'E' and then Is_Boolean_Type (Ent) then
1244 Ctyp := 'B';
1245 end if;
1246
1247 -- For variable reference, get corresponding type
1248
1249 if Ctyp = '*' then
1250 Ent := Etype (XE.Ent);
1251 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1252
1253 -- If variable is private type, get full view type
1254
1255 if Ctyp = '+'
1256 and then Present (Full_View (Etype (XE.Ent)))
1257 then
1258 Ent := Underlying_Type (Etype (XE.Ent));
1259
1260 if Present (Ent) then
1261 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1262 end if;
1263 end if;
1264
1265 -- Special handling for access parameter
1266
1267 declare
1268 K : constant Entity_Kind := Ekind (Etype (XE.Ent));
1269
1270 begin
1271 if (K = E_Anonymous_Access_Type
1272 or else
1273 K = E_Anonymous_Access_Subprogram_Type
1274 or else K =
1275 E_Anonymous_Access_Protected_Subprogram_Type)
1276 and then Is_Formal (XE.Ent)
1277 then
1278 Ctyp := 'p';
1279
1280 -- Special handling for Boolean
1281
1282 elsif Ctyp = 'e' and then Is_Boolean_Type (Ent) then
1283 Ctyp := 'b';
1284 end if;
1285 end;
1286 end if;
1287
1288 -- Special handling for abstract types and operations.
1289
1290 if Is_Abstract (XE.Ent) then
1291
1292 if Ctyp = 'U' then
1293 Ctyp := 'x'; -- abstract procedure
1294
1295 elsif Ctyp = 'V' then
1296 Ctyp := 'y'; -- abstract function
1297
1298 elsif Ctyp = 'R' then
1299 Ctyp := 'H'; -- abstract type
1300 end if;
1301 end if;
1302
1303 -- Only output reference if interesting type of entity,
1304 -- and suppress self references, except for bodies that
1305 -- act as specs. Also suppress definitions of body formals
1306 -- (we only treat these as references, and the references
1307 -- were separately recorded).
1308
1309 if Ctyp = ' '
1310 or else (XE.Loc = XE.Def
1311 and then
1312 (XE.Typ /= 'b'
1313 or else not Is_Subprogram (XE.Ent)))
1314 or else (Is_Formal (XE.Ent)
1315 and then Present (Spec_Entity (XE.Ent)))
1316 then
1317 null;
1318
1319 else
1320 -- Start new Xref section if new xref unit
1321
1322 if XE.Eun /= Curxu then
1323 if Write_Info_Col > 1 then
1324 Write_Info_EOL;
1325 end if;
1326
1327 Curxu := XE.Eun;
1328 Cursrc := Source_Text (Source_Index (Curxu));
1329
1330 Write_Info_Initiate ('X');
1331 Write_Info_Char (' ');
1332 Write_Info_Nat (Dependency_Num (XE.Eun));
1333 Write_Info_Char (' ');
1334 Write_Info_Name (Reference_Name (Source_Index (XE.Eun)));
1335 end if;
1336
1337 -- Start new Entity line if new entity. Note that we
1338 -- consider two entities the same if they have the same
1339 -- name and source location. This causes entities in
1340 -- instantiations to be treated as though they referred
1341 -- to the template.
1342
1343 if No (Curent)
1344 or else
1345 (XE.Ent /= Curent
1346 and then
1347 (Name_Change (XE.Ent) or else XE.Def /= Curdef))
1348 then
1349 Curent := XE.Ent;
1350 Curdef := XE.Def;
1351
1352 Get_Unqualified_Name_String (Chars (XE.Ent));
1353 Curlen := Name_Len;
1354 Curnam (1 .. Curlen) := Name_Buffer (1 .. Curlen);
1355
1356 if Write_Info_Col > 1 then
1357 Write_Info_EOL;
1358 end if;
1359
1360 -- Write column number information
1361
1362 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Def)));
1363 Write_Info_Char (Ctyp);
1364 Write_Info_Nat (Int (Get_Column_Number (XE.Def)));
1365
1366 -- Write level information
1367
1368 Write_Level_Info : declare
1369 function Is_Visible_Generic_Entity
1370 (E : Entity_Id) return Boolean;
1371 -- Check whether E is declared in the visible part
1372 -- of a generic package. For source navigation
1373 -- purposes, treat this as a visible entity.
1374
1375 function Is_Private_Record_Component
1376 (E : Entity_Id) return Boolean;
1377 -- Check whether E is a non-inherited component of a
1378 -- private extension. Even if the enclosing record is
1379 -- public, we want to treat the component as private
1380 -- for navigation purposes.
1381
1382 ---------------------------------
1383 -- Is_Private_Record_Component --
1384 ---------------------------------
1385
1386 function Is_Private_Record_Component
1387 (E : Entity_Id) return Boolean
1388 is
1389 S : constant Entity_Id := Scope (E);
1390 begin
1391 return
1392 Ekind (E) = E_Component
1393 and then Nkind (Declaration_Node (S)) =
1394 N_Private_Extension_Declaration
1395 and then Original_Record_Component (E) = E;
1396 end Is_Private_Record_Component;
1397
1398 -------------------------------
1399 -- Is_Visible_Generic_Entity --
1400 -------------------------------
1401
1402 function Is_Visible_Generic_Entity
1403 (E : Entity_Id) return Boolean
1404 is
1405 Par : Node_Id;
1406
1407 begin
1408 if Ekind (Scope (E)) /= E_Generic_Package then
1409 return False;
1410 end if;
1411
1412 Par := Parent (E);
1413 while Present (Par) loop
1414 if
1415 Nkind (Par) = N_Generic_Package_Declaration
1416 then
1417 -- Entity is a generic formal
1418
1419 return False;
1420
1421 elsif
1422 Nkind (Parent (Par)) = N_Package_Specification
1423 then
1424 return
1425 Is_List_Member (Par)
1426 and then List_Containing (Par) =
1427 Visible_Declarations (Parent (Par));
1428 else
1429 Par := Parent (Par);
1430 end if;
1431 end loop;
1432
1433 return False;
1434 end Is_Visible_Generic_Entity;
1435
1436 -- Start of processing for Write_Level_Info
1437
1438 begin
1439 if Is_Hidden (Curent)
1440 or else Is_Private_Record_Component (Curent)
1441 then
1442 Write_Info_Char (' ');
1443
1444 elsif
1445 Is_Public (Curent)
1446 or else Is_Visible_Generic_Entity (Curent)
1447 then
1448 Write_Info_Char ('*');
1449
1450 else
1451 Write_Info_Char (' ');
1452 end if;
1453 end Write_Level_Info;
1454
1455 -- Output entity name. We use the occurrence from the
1456 -- actual source program at the definition point
1457
1458 P := Original_Location (Sloc (XE.Ent));
1459
1460 -- Entity is character literal
1461
1462 if Cursrc (P) = ''' then
1463 Write_Info_Char (Cursrc (P));
1464 Write_Info_Char (Cursrc (P + 1));
1465 Write_Info_Char (Cursrc (P + 2));
1466
1467 -- Entity is operator symbol
1468
1469 elsif Cursrc (P) = '"' or else Cursrc (P) = '%' then
1470 Write_Info_Char (Cursrc (P));
1471
1472 P2 := P;
1473 loop
1474 P2 := P2 + 1;
1475 Write_Info_Char (Cursrc (P2));
1476 exit when Cursrc (P2) = Cursrc (P);
1477 end loop;
1478
1479 -- Entity is identifier
1480
1481 else
1482 loop
1483 if Is_Start_Of_Wide_Char (Cursrc, P) then
1484 Scan_Wide (Cursrc, P, WC, Err);
1485 elsif not Identifier_Char (Cursrc (P)) then
1486 exit;
1487 else
1488 P := P + 1;
1489 end if;
1490 end loop;
1491
1492 for J in
1493 Original_Location (Sloc (XE.Ent)) .. P - 1
1494 loop
1495 Write_Info_Char (Cursrc (J));
1496 end loop;
1497 end if;
1498
1499 -- See if we have a renaming reference
1500
1501 if Is_Object (XE.Ent)
1502 and then Present (Renamed_Object (XE.Ent))
1503 then
1504 Rref := Renamed_Object (XE.Ent);
1505
1506 elsif Is_Overloadable (XE.Ent)
1507 and then Nkind (Parent (Declaration_Node (XE.Ent))) =
1508 N_Subprogram_Renaming_Declaration
1509 then
1510 Rref := Name (Parent (Declaration_Node (XE.Ent)));
1511
1512 elsif Ekind (XE.Ent) = E_Package
1513 and then Nkind (Declaration_Node (XE.Ent)) =
1514 N_Package_Renaming_Declaration
1515 then
1516 Rref := Name (Declaration_Node (XE.Ent));
1517
1518 else
1519 Rref := Empty;
1520 end if;
1521
1522 if Present (Rref) then
1523 if Nkind (Rref) = N_Expanded_Name then
1524 Rref := Selector_Name (Rref);
1525 end if;
1526
1527 if Nkind (Rref) /= N_Identifier then
1528 Rref := Empty;
1529 end if;
1530 end if;
1531
1532 -- Write out renaming reference if we have one
1533
1534 if Present (Rref) then
1535 Write_Info_Char ('=');
1536 Write_Info_Nat
1537 (Int (Get_Logical_Line_Number (Sloc (Rref))));
1538 Write_Info_Char (':');
1539 Write_Info_Nat
1540 (Int (Get_Column_Number (Sloc (Rref))));
1541 end if;
1542
1543 -- Indicate that the entity is in the unit
1544 -- of the current xref xection.
1545
1546 Curru := Curxu;
1547
1548 -- See if we have a type reference and if so output
1549
1550 Get_Type_Reference (XE.Ent, Tref, Left, Right);
1551
1552 if Present (Tref) then
1553
1554 -- Case of standard entity, output name
1555
1556 if Sloc (Tref) = Standard_Location then
1557 Write_Info_Char (Left);
1558 Write_Info_Name (Chars (Tref));
1559 Write_Info_Char (Right);
1560
1561 -- Case of source entity, output location
1562
1563 else
1564 Write_Info_Char (Left);
1565 Trunit := Get_Source_Unit (Sloc (Tref));
1566
1567 if Trunit /= Curxu then
1568 Write_Info_Nat (Dependency_Num (Trunit));
1569 Write_Info_Char ('|');
1570 end if;
1571
1572 Write_Info_Nat
1573 (Int (Get_Logical_Line_Number (Sloc (Tref))));
1574
1575 declare
1576 Ent : Entity_Id := Tref;
1577 Kind : constant Entity_Kind := Ekind (Ent);
1578 Ctyp : Character := Xref_Entity_Letters (Kind);
1579
1580 begin
1581 if Ctyp = '+'
1582 and then Present (Full_View (Ent))
1583 then
1584 Ent := Underlying_Type (Ent);
1585
1586 if Present (Ent) then
1587 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1588 end if;
1589 end if;
1590
1591 Write_Info_Char (Ctyp);
1592 end;
1593
1594 Write_Info_Nat
1595 (Int (Get_Column_Number (Sloc (Tref))));
1596
1597 -- If the type comes from an instantiation,
1598 -- add the corresponding info.
1599
1600 Output_Instantiation_Refs (Sloc (Tref));
1601 Write_Info_Char (Right);
1602 end if;
1603 end if;
1604
1605 -- End of processing for entity output
1606
1607 Crloc := No_Location;
1608 end if;
1609
1610 -- Output the reference
1611
1612 if XE.Loc /= No_Location
1613 and then XE.Loc /= Crloc
1614 then
1615 Crloc := XE.Loc;
1616
1617 -- Start continuation if line full, else blank
1618
1619 if Write_Info_Col > 72 then
1620 Write_Info_EOL;
1621 Write_Info_Initiate ('.');
1622 end if;
1623
1624 Write_Info_Char (' ');
1625
1626 -- Output file number if changed
1627
1628 if XE.Lun /= Curru then
1629 Curru := XE.Lun;
1630 Write_Info_Nat (Dependency_Num (Curru));
1631 Write_Info_Char ('|');
1632 end if;
1633
1634 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Loc)));
1635 Write_Info_Char (XE.Typ);
1636
1637 if Is_Overloadable (XE.Ent)
1638 and then Is_Imported (XE.Ent)
1639 and then XE.Typ = 'b'
1640 then
1641 Output_Import_Export_Info (XE.Ent);
1642 end if;
1643
1644 Write_Info_Nat (Int (Get_Column_Number (XE.Loc)));
1645
1646 Output_Instantiation_Refs (Sloc (XE.Ent));
1647 end if;
1648 end if;
1649 end Output_One_Ref;
1650
1651 <<Continue>>
1652 null;
1653 end loop;
1654
1655 Write_Info_EOL;
1656 end Output_Refs;
1657 end Output_References;
1658
1659 end Lib.Xref;
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