1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1998-2008, Free Software Foundation, Inc. --
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. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 with Atree; use Atree;
27 with Csets; use Csets;
28 with Elists; use Elists;
29 with Errout; use Errout;
30 with Lib.Util; use Lib.Util;
31 with Nlists; use Nlists;
33 with Restrict; use Restrict;
34 with Rident; use Rident;
36 with Sem_Aux; use Sem_Aux;
37 with Sem_Prag; use Sem_Prag;
38 with Sem_Util; use Sem_Util;
39 with Sem_Warn; use Sem_Warn;
40 with Sinfo; use Sinfo;
41 with Sinput; use Sinput;
42 with Snames; use Snames;
43 with Stringt; use Stringt;
44 with Stand; use Stand;
45 with Table; use Table;
46 with Widechar; use Widechar;
48 with GNAT.Heap_Sort_G;
50 package body Lib.Xref is
56 -- The Xref table is used to record references. The Loc field is set
57 -- to No_Location for a definition entry.
59 subtype Xref_Entry_Number is Int;
61 type Xref_Entry is record
63 -- Entity referenced (E parameter to Generate_Reference)
66 -- Original source location for entity being referenced. Note that these
67 -- values are used only during the output process, they are not set when
68 -- the entries are originally built. This is because private entities
69 -- can be swapped when the initial call is made.
72 -- Location of reference (Original_Location (Sloc field of N parameter
73 -- to Generate_Reference). Set to No_Location for the case of a
74 -- defining occurrence.
77 -- Reference type (Typ param to Generate_Reference)
79 Eun : Unit_Number_Type;
80 -- Unit number corresponding to Ent
82 Lun : Unit_Number_Type;
83 -- Unit number corresponding to Loc. Value is undefined and not
84 -- referenced if Loc is set to No_Location.
88 package Xrefs is new Table.Table (
89 Table_Component_Type => Xref_Entry,
90 Table_Index_Type => Xref_Entry_Number,
92 Table_Initial => Alloc.Xrefs_Initial,
93 Table_Increment => Alloc.Xrefs_Increment,
94 Table_Name => "Xrefs");
96 -------------------------
97 -- Generate_Definition --
98 -------------------------
100 procedure Generate_Definition (E : Entity_Id) is
105 pragma Assert (Nkind (E) in N_Entity);
107 -- Note that we do not test Xref_Entity_Letters here. It is too early
108 -- to do so, since we are often called before the entity is fully
109 -- constructed, so that the Ekind is still E_Void.
113 -- Definition must come from source
115 -- We make an exception for subprogram child units that have no spec.
116 -- For these we generate a subprogram declaration for library use,
117 -- and the corresponding entity does not come from source.
118 -- Nevertheless, all references will be attached to it and we have
119 -- to treat is as coming from user code.
121 and then (Comes_From_Source (E) or else Is_Child_Unit (E))
123 -- And must have a reasonable source location that is not
124 -- within an instance (all entities in instances are ignored)
126 and then Sloc (E) > No_Location
127 and then Instantiation_Location (Sloc (E)) = No_Location
129 -- And must be a non-internal name from the main source unit
131 and then In_Extended_Main_Source_Unit (E)
132 and then not Is_Internal_Name (Chars (E))
134 Xrefs.Increment_Last;
136 Loc := Original_Location (Sloc (E));
138 Xrefs.Table (Indx).Ent := E;
139 Xrefs.Table (Indx).Def := No_Location;
140 Xrefs.Table (Indx).Loc := No_Location;
141 Xrefs.Table (Indx).Typ := ' ';
142 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
143 Xrefs.Table (Indx).Lun := No_Unit;
144 Set_Has_Xref_Entry (E);
146 if In_Inlined_Body then
150 end Generate_Definition;
152 ---------------------------------
153 -- Generate_Operator_Reference --
154 ---------------------------------
156 procedure Generate_Operator_Reference
161 if not In_Extended_Main_Source_Unit (N) then
165 -- If the operator is not a Standard operator, then we generate a real
166 -- reference to the user defined operator.
168 if Sloc (Entity (N)) /= Standard_Location then
169 Generate_Reference (Entity (N), N);
171 -- A reference to an implicit inequality operator is also a reference
172 -- to the user-defined equality.
174 if Nkind (N) = N_Op_Ne
175 and then not Comes_From_Source (Entity (N))
176 and then Present (Corresponding_Equality (Entity (N)))
178 Generate_Reference (Corresponding_Equality (Entity (N)), N);
181 -- For the case of Standard operators, we mark the result type as
182 -- referenced. This ensures that in the case where we are using a
183 -- derived operator, we mark an entity of the unit that implicitly
184 -- defines this operator as used. Otherwise we may think that no entity
185 -- of the unit is used. The actual entity marked as referenced is the
186 -- first subtype, which is the relevant user defined entity.
188 -- Note: we only do this for operators that come from source. The
189 -- generated code sometimes reaches for entities that do not need to be
190 -- explicitly visible (for example, when we expand the code for
191 -- comparing two record objects, the fields of the record may not be
194 elsif Comes_From_Source (N) then
195 Set_Referenced (First_Subtype (T));
197 end Generate_Operator_Reference;
199 ------------------------
200 -- Generate_Reference --
201 ------------------------
203 procedure Generate_Reference
206 Typ : Character := 'r';
207 Set_Ref : Boolean := True;
208 Force : Boolean := False)
218 -- Used for call to Find_Actual
221 -- If Formal is non-Empty, then its Ekind, otherwise E_Void
223 function Is_On_LHS (Node : Node_Id) return Boolean;
224 -- Used to check if a node is on the left hand side of an assignment.
225 -- The following cases are handled:
227 -- Variable Node is a direct descendant of left hand side of an
228 -- assignment statement.
230 -- Prefix Of an indexed or selected component that is present in
231 -- a subtree rooted by an assignment statement. There is
232 -- no restriction of nesting of components, thus cases
233 -- such as A.B (C).D are handled properly. However a prefix
234 -- of a dereference (either implicit or explicit) is never
235 -- considered as on a LHS.
237 -- Out param Same as above cases, but OUT parameter
239 function OK_To_Set_Referenced return Boolean;
240 -- Returns True if the Referenced flag can be set. There are a few
241 -- exceptions where we do not want to set this flag, see body for
242 -- details of these exceptional cases.
248 -- ??? There are several routines here and there that perform a similar
249 -- (but subtly different) computation, which should be factored:
251 -- Sem_Util.May_Be_Lvalue
252 -- Sem_Util.Known_To_Be_Assigned
253 -- Exp_Ch2.Expand_Entry_Parameter.In_Assignment_Context
254 -- Exp_Smem.Is_Out_Actual
256 function Is_On_LHS (Node : Node_Id) return Boolean is
262 -- Only identifiers are considered, is this necessary???
264 if Nkind (Node) /= N_Identifier then
268 -- Immediate return if appeared as OUT parameter
270 if Kind = E_Out_Parameter then
274 -- Search for assignment statement subtree root
281 if K = N_Assignment_Statement then
284 -- Check whether the parent is a component and the current node is
285 -- its prefix, but return False if the current node has an access
286 -- type, as in that case the selected or indexed component is an
287 -- implicit dereference, and the LHS is the designated object, not
288 -- the access object.
290 -- ??? case of a slice assignment?
292 -- ??? Note that in some cases this is called too early
293 -- (see comments in Sem_Ch8.Find_Direct_Name), at a point where
294 -- the tree is not fully typed yet. In that case we may lack
295 -- an Etype for N, and we must disable the check for an implicit
296 -- dereference. If the dereference is on an LHS, this causes a
299 elsif (K = N_Selected_Component or else K = N_Indexed_Component)
300 and then Prefix (P) = N
301 and then not (Present (Etype (N))
303 Is_Access_Type (Etype (N)))
307 -- All other cases, definitely not on left side
315 ---------------------------
316 -- OK_To_Set_Referenced --
317 ---------------------------
319 function OK_To_Set_Referenced return Boolean is
323 -- A reference from a pragma Unreferenced or pragma Unmodified or
324 -- pragma Warnings does not cause the Referenced flag to be set.
325 -- This avoids silly warnings about things being referenced and
326 -- not assigned when the only reference is from the pragma.
328 if Nkind (N) = N_Identifier then
331 if Nkind (P) = N_Pragma_Argument_Association then
334 if Nkind (P) = N_Pragma then
335 if Pragma_Name (P) = Name_Warnings
337 Pragma_Name (P) = Name_Unmodified
339 Pragma_Name (P) = Name_Unreferenced
348 end OK_To_Set_Referenced;
350 -- Start of processing for Generate_Reference
353 pragma Assert (Nkind (E) in N_Entity);
354 Find_Actual (N, Formal, Call);
356 if Present (Formal) then
357 Kind := Ekind (Formal);
362 -- Check for obsolescent reference to package ASCII. GNAT treats this
363 -- element of annex J specially since in practice, programs make a lot
364 -- of use of this feature, so we don't include it in the set of features
365 -- diagnosed when Warn_On_Obsolescent_Features mode is set. However we
366 -- are required to note it as a violation of the RM defined restriction.
368 if E = Standard_ASCII then
369 Check_Restriction (No_Obsolescent_Features, N);
372 -- Check for reference to entity marked with Is_Obsolescent
374 -- Note that we always allow obsolescent references in the compiler
375 -- itself and the run time, since we assume that we know what we are
376 -- doing in such cases. For example the calls in Ada.Characters.Handling
377 -- to its own obsolescent subprograms are just fine.
379 -- In any case we do not generate warnings within the extended source
380 -- unit of the entity in question, since we assume the source unit
381 -- itself knows what is going on (and for sure we do not want silly
382 -- warnings, e.g. on the end line of an obsolescent procedure body).
384 if Is_Obsolescent (E)
385 and then not GNAT_Mode
386 and then not In_Extended_Main_Source_Unit (E)
388 Check_Restriction (No_Obsolescent_Features, N);
390 if Warn_On_Obsolescent_Feature then
391 Output_Obsolescent_Entity_Warnings (N, E);
395 -- Warn if reference to Ada 2005 entity not in Ada 2005 mode. We only
396 -- detect real explicit references (modifications and references).
398 if Comes_From_Source (N)
399 and then Is_Ada_2005_Only (E)
400 and then Ada_Version < Ada_05
401 and then Warn_On_Ada_2005_Compatibility
402 and then (Typ = 'm' or else Typ = 'r')
404 Error_Msg_NE ("& is only defined in Ada 2005?", N, E);
407 -- Never collect references if not in main source unit. However, we omit
408 -- this test if Typ is 'e' or 'k', since these entries are structural,
409 -- and it is useful to have them in units that reference packages as
410 -- well as units that define packages. We also omit the test for the
411 -- case of 'p' since we want to include inherited primitive operations
412 -- from other packages.
414 -- We also omit this test is this is a body reference for a subprogram
415 -- instantiation. In this case the reference is to the generic body,
416 -- which clearly need not be in the main unit containing the instance.
417 -- For the same reason we accept an implicit reference generated for
418 -- a default in an instance.
420 if not In_Extended_Main_Source_Unit (N) then
425 or else (Typ = 'b' and then Is_Generic_Instance (E))
433 -- For reference type p, the entity must be in main source unit
435 if Typ = 'p' and then not In_Extended_Main_Source_Unit (E) then
439 -- Unless the reference is forced, we ignore references where the
440 -- reference itself does not come from source.
442 if not Force and then not Comes_From_Source (N) then
446 -- Deal with setting entity as referenced, unless suppressed. Note that
447 -- we still do Set_Referenced on entities that do not come from source.
448 -- This situation arises when we have a source reference to a derived
449 -- operation, where the derived operation itself does not come from
450 -- source, but we still want to mark it as referenced, since we really
451 -- are referencing an entity in the corresponding package (this avoids
452 -- wrong complaints that the package contains no referenced entities).
456 -- Assignable object appearing on left side of assignment or as
460 and then Is_On_LHS (N)
461 and then Ekind (E) /= E_In_Out_Parameter
463 -- For objects that are renamings, just set as simply referenced
464 -- we do not try to do assignment type tracking in this case.
466 if Present (Renamed_Object (E)) then
469 -- Out parameter case
471 elsif Kind = E_Out_Parameter then
473 -- If warning mode for all out parameters is set, or this is
474 -- the only warning parameter, then we want to mark this for
475 -- later warning logic by setting Referenced_As_Out_Parameter
477 if Warn_On_Modified_As_Out_Parameter (Formal) then
478 Set_Referenced_As_Out_Parameter (E, True);
479 Set_Referenced_As_LHS (E, False);
481 -- For OUT parameter not covered by the above cases, we simply
482 -- regard it as a normal reference (in this case we do not
483 -- want any of the warning machinery for out parameters).
489 -- For the left hand of an assignment case, we do nothing here.
490 -- The processing for Analyze_Assignment_Statement will set the
491 -- Referenced_As_LHS flag.
497 -- Check for a reference in a pragma that should not count as a
498 -- making the variable referenced for warning purposes.
500 elsif Is_Non_Significant_Pragma_Reference (N) then
503 -- A reference in an attribute definition clause does not count as a
504 -- reference except for the case of Address. The reason that 'Address
505 -- is an exception is that it creates an alias through which the
506 -- variable may be referenced.
508 elsif Nkind (Parent (N)) = N_Attribute_Definition_Clause
509 and then Chars (Parent (N)) /= Name_Address
510 and then N = Name (Parent (N))
514 -- Constant completion does not count as a reference
517 and then Ekind (E) = E_Constant
521 -- Record representation clause does not count as a reference
523 elsif Nkind (N) = N_Identifier
524 and then Nkind (Parent (N)) = N_Record_Representation_Clause
528 -- Discriminants do not need to produce a reference to record type
531 and then Nkind (Parent (N)) = N_Discriminant_Specification
538 -- Special processing for IN OUT parameters, where we have an
539 -- implicit assignment to a simple variable.
541 if Kind = E_In_Out_Parameter
542 and then Is_Assignable (E)
544 -- For sure this counts as a normal read reference
547 Set_Last_Assignment (E, Empty);
549 -- We count it as being referenced as an out parameter if the
550 -- option is set to warn on all out parameters, except that we
551 -- have a special exclusion for an intrinsic subprogram, which
552 -- is most likely an instantiation of Unchecked_Deallocation
553 -- which we do not want to consider as an assignment since it
554 -- generates false positives. We also exclude the case of an
555 -- IN OUT parameter if the name of the procedure is Free,
556 -- since we suspect similar semantics.
558 if Warn_On_All_Unread_Out_Parameters
559 and then Is_Entity_Name (Name (Call))
560 and then not Is_Intrinsic_Subprogram (Entity (Name (Call)))
561 and then Chars (Name (Call)) /= Name_Free
563 Set_Referenced_As_Out_Parameter (E, True);
564 Set_Referenced_As_LHS (E, False);
567 -- Don't count a recursive reference within a subprogram as a
568 -- reference (that allows detection of a recursive subprogram
569 -- whose only references are recursive calls as unreferenced).
571 elsif Is_Subprogram (E)
572 and then E = Nearest_Dynamic_Scope (Current_Scope)
576 -- Any other occurrence counts as referencing the entity
578 elsif OK_To_Set_Referenced then
581 -- If variable, this is an OK reference after an assignment
582 -- so we can clear the Last_Assignment indication.
584 if Is_Assignable (E) then
585 Set_Last_Assignment (E, Empty);
590 -- Check for pragma Unreferenced given and reference is within
591 -- this source unit (occasion for possible warning to be issued).
593 if Has_Pragma_Unreferenced (E)
594 and then In_Same_Extended_Unit (E, N)
596 -- A reference as a named parameter in a call does not count
597 -- as a violation of pragma Unreferenced for this purpose...
599 if Nkind (N) = N_Identifier
600 and then Nkind (Parent (N)) = N_Parameter_Association
601 and then Selector_Name (Parent (N)) = N
605 -- ... Neither does a reference to a variable on the left side
608 elsif Is_On_LHS (N) then
611 -- For entry formals, we want to place the warning message on the
612 -- corresponding entity in the accept statement. The current scope
613 -- is the body of the accept, so we find the formal whose name
614 -- matches that of the entry formal (there is no link between the
615 -- two entities, and the one in the accept statement is only used
616 -- for conformance checking).
618 elsif Ekind (Scope (E)) = E_Entry then
623 BE := First_Entity (Current_Scope);
624 while Present (BE) loop
625 if Chars (BE) = Chars (E) then
627 ("?pragma Unreferenced given for&!", N, BE);
635 -- Here we issue the warning, since this is a real reference
638 Error_Msg_NE ("?pragma Unreferenced given for&!", N, E);
642 -- If this is a subprogram instance, mark as well the internal
643 -- subprogram in the wrapper package, which may be a visible
646 if Is_Overloadable (E)
647 and then Is_Generic_Instance (E)
648 and then Present (Alias (E))
650 Set_Referenced (Alias (E));
654 -- Generate reference if all conditions are met:
657 -- Cross referencing must be active
661 -- The entity must be one for which we collect references
663 and then Xref_Entity_Letters (Ekind (E)) /= ' '
665 -- Both Sloc values must be set to something sensible
667 and then Sloc (E) > No_Location
668 and then Sloc (N) > No_Location
670 -- We ignore references from within an instance, except for default
671 -- subprograms, for which we generate an implicit reference.
674 (Instantiation_Location (Sloc (N)) = No_Location or else Typ = 'i')
676 -- Ignore dummy references
680 if Nkind (N) = N_Identifier
682 Nkind (N) = N_Defining_Identifier
686 Nkind (N) = N_Defining_Operator_Symbol
688 Nkind (N) = N_Operator_Symbol
690 (Nkind (N) = N_Character_Literal
691 and then Sloc (Entity (N)) /= Standard_Location)
693 Nkind (N) = N_Defining_Character_Literal
697 elsif Nkind (N) = N_Expanded_Name
699 Nkind (N) = N_Selected_Component
701 Nod := Selector_Name (N);
707 -- Normal case of source entity comes from source
709 if Comes_From_Source (E) then
712 -- Entity does not come from source, but is a derived subprogram and
713 -- the derived subprogram comes from source (after one or more
714 -- derivations) in which case the reference is to parent subprogram.
716 elsif Is_Overloadable (E)
717 and then Present (Alias (E))
720 while not Comes_From_Source (Ent) loop
721 if No (Alias (Ent)) then
728 -- The internally created defining entity for a child subprogram
729 -- that has no previous spec has valid references.
731 elsif Is_Overloadable (E)
732 and then Is_Child_Unit (E)
736 -- Record components of discriminated subtypes or derived types must
737 -- be treated as references to the original component.
739 elsif Ekind (E) = E_Component
740 and then Comes_From_Source (Original_Record_Component (E))
742 Ent := Original_Record_Component (E);
744 -- If this is an expanded reference to a discriminant, recover the
745 -- original discriminant, which gets the reference.
747 elsif Ekind (E) = E_In_Parameter
748 and then Present (Discriminal_Link (E))
750 Ent := Discriminal_Link (E);
751 Set_Referenced (Ent);
753 -- Ignore reference to any other entity that is not from source
759 -- Record reference to entity
761 Ref := Original_Location (Sloc (Nod));
762 Def := Original_Location (Sloc (Ent));
764 Xrefs.Increment_Last;
767 Xrefs.Table (Indx).Loc := Ref;
769 -- Overriding operations are marked with 'P'
772 and then Is_Subprogram (N)
773 and then Is_Overriding_Operation (N)
775 Xrefs.Table (Indx).Typ := 'P';
777 Xrefs.Table (Indx).Typ := Typ;
780 Xrefs.Table (Indx).Eun := Get_Source_Unit (Def);
781 Xrefs.Table (Indx).Lun := Get_Source_Unit (Ref);
782 Xrefs.Table (Indx).Ent := Ent;
783 Set_Has_Xref_Entry (Ent);
785 end Generate_Reference;
787 -----------------------------------
788 -- Generate_Reference_To_Formals --
789 -----------------------------------
791 procedure Generate_Reference_To_Formals (E : Entity_Id) is
795 if Is_Generic_Subprogram (E) then
796 Formal := First_Entity (E);
798 while Present (Formal)
799 and then not Is_Formal (Formal)
801 Next_Entity (Formal);
805 Formal := First_Formal (E);
808 while Present (Formal) loop
809 if Ekind (Formal) = E_In_Parameter then
811 if Nkind (Parameter_Type (Parent (Formal)))
812 = N_Access_Definition
814 Generate_Reference (E, Formal, '^', False);
816 Generate_Reference (E, Formal, '>', False);
819 elsif Ekind (Formal) = E_In_Out_Parameter then
820 Generate_Reference (E, Formal, '=', False);
823 Generate_Reference (E, Formal, '<', False);
826 Next_Formal (Formal);
828 end Generate_Reference_To_Formals;
830 -------------------------------------------
831 -- Generate_Reference_To_Generic_Formals --
832 -------------------------------------------
834 procedure Generate_Reference_To_Generic_Formals (E : Entity_Id) is
838 Formal := First_Entity (E);
839 while Present (Formal) loop
840 if Comes_From_Source (Formal) then
841 Generate_Reference (E, Formal, 'z', False);
844 Next_Entity (Formal);
846 end Generate_Reference_To_Generic_Formals;
852 procedure Initialize is
857 -----------------------
858 -- Output_References --
859 -----------------------
861 procedure Output_References is
863 procedure Get_Type_Reference
865 Tref : out Entity_Id;
866 Left : out Character;
867 Right : out Character);
868 -- Given an Entity_Id Ent, determines whether a type reference is
869 -- required. If so, Tref is set to the entity for the type reference
870 -- and Left and Right are set to the left/right brackets to be output
871 -- for the reference. If no type reference is required, then Tref is
872 -- set to Empty, and Left/Right are set to space.
874 procedure Output_Import_Export_Info (Ent : Entity_Id);
875 -- Output language and external name information for an interfaced
876 -- entity, using the format <language, external_name>,
878 ------------------------
879 -- Get_Type_Reference --
880 ------------------------
882 procedure Get_Type_Reference
884 Tref : out Entity_Id;
885 Left : out Character;
886 Right : out Character)
891 -- See if we have a type reference
900 -- Processing for types
902 if Is_Type (Tref) then
906 if Base_Type (Tref) = Tref then
908 -- If derived, then get first subtype
910 if Tref /= Etype (Tref) then
911 Tref := First_Subtype (Etype (Tref));
913 -- Set brackets for derived type, but don't override
914 -- pointer case since the fact that something is a
915 -- pointer is more important.
922 -- If non-derived ptr, get directly designated type.
923 -- If the type has a full view, all references are on the
924 -- partial view, that is seen first.
926 elsif Is_Access_Type (Tref) then
927 Tref := Directly_Designated_Type (Tref);
931 elsif Is_Private_Type (Tref)
932 and then Present (Full_View (Tref))
934 if Is_Access_Type (Full_View (Tref)) then
935 Tref := Directly_Designated_Type (Full_View (Tref));
939 -- If the full view is an array type, we also retrieve
940 -- the corresponding component type, because the ali
941 -- entry already indicates that this is an array.
943 elsif Is_Array_Type (Full_View (Tref)) then
944 Tref := Component_Type (Full_View (Tref));
949 -- If non-derived array, get component type. Skip component
950 -- type for case of String or Wide_String, saves worthwhile
953 elsif Is_Array_Type (Tref)
954 and then Tref /= Standard_String
955 and then Tref /= Standard_Wide_String
957 Tref := Component_Type (Tref);
961 -- For other non-derived base types, nothing
967 -- For a subtype, go to ancestor subtype
970 Tref := Ancestor_Subtype (Tref);
972 -- If no ancestor subtype, go to base type
975 Tref := Base_Type (Sav);
979 -- For objects, functions, enum literals, just get type from
982 elsif Is_Object (Tref)
983 or else Ekind (Tref) = E_Enumeration_Literal
984 or else Ekind (Tref) = E_Function
985 or else Ekind (Tref) = E_Operator
987 Tref := Etype (Tref);
989 -- For anything else, exit
995 -- Exit if no type reference, or we are stuck in some loop trying
996 -- to find the type reference, or if the type is standard void
997 -- type (the latter is an implementation artifact that should not
998 -- show up in the generated cross-references).
1002 or else Tref = Standard_Void_Type;
1004 -- If we have a usable type reference, return, otherwise keep
1005 -- looking for something useful (we are looking for something
1006 -- that either comes from source or standard)
1008 if Sloc (Tref) = Standard_Location
1009 or else Comes_From_Source (Tref)
1011 -- If the reference is a subtype created for a generic actual,
1012 -- go actual directly, the inner subtype is not user visible.
1014 if Nkind (Parent (Tref)) = N_Subtype_Declaration
1015 and then not Comes_From_Source (Parent (Tref))
1017 (Is_Wrapper_Package (Scope (Tref))
1018 or else Is_Generic_Instance (Scope (Tref)))
1020 Tref := First_Subtype (Base_Type (Tref));
1027 -- If we fall through the loop, no type reference
1032 end Get_Type_Reference;
1034 -------------------------------
1035 -- Output_Import_Export_Info --
1036 -------------------------------
1038 procedure Output_Import_Export_Info (Ent : Entity_Id) is
1039 Language_Name : Name_Id;
1040 Conv : constant Convention_Id := Convention (Ent);
1043 -- Generate language name from convention
1045 if Conv = Convention_C then
1046 Language_Name := Name_C;
1048 elsif Conv = Convention_CPP then
1049 Language_Name := Name_CPP;
1051 elsif Conv = Convention_Ada then
1052 Language_Name := Name_Ada;
1055 -- For the moment we ignore all other cases ???
1060 Write_Info_Char ('<');
1061 Get_Unqualified_Name_String (Language_Name);
1063 for J in 1 .. Name_Len loop
1064 Write_Info_Char (Name_Buffer (J));
1067 if Present (Interface_Name (Ent)) then
1068 Write_Info_Char (',');
1069 String_To_Name_Buffer (Strval (Interface_Name (Ent)));
1071 for J in 1 .. Name_Len loop
1072 Write_Info_Char (Name_Buffer (J));
1076 Write_Info_Char ('>');
1077 end Output_Import_Export_Info;
1079 -- Start of processing for Output_References
1082 if not Opt.Xref_Active then
1086 -- Before we go ahead and output the references we have a problem
1087 -- that needs dealing with. So far we have captured things that are
1088 -- definitely referenced by the main unit, or defined in the main
1089 -- unit. That's because we don't want to clutter up the ali file
1090 -- for this unit with definition lines for entities in other units
1091 -- that are not referenced.
1093 -- But there is a glitch. We may reference an entity in another unit,
1094 -- and it may have a type reference to an entity that is not directly
1095 -- referenced in the main unit, which may mean that there is no xref
1096 -- entry for this entity yet in the list of references.
1098 -- If we don't do something about this, we will end with an orphan type
1099 -- reference, i.e. it will point to an entity that does not appear
1100 -- within the generated references in the ali file. That is not good for
1101 -- tools using the xref information.
1103 -- To fix this, we go through the references adding definition entries
1104 -- for any unreferenced entities that can be referenced in a type
1105 -- reference. There is a recursion problem here, and that is dealt with
1106 -- by making sure that this traversal also traverses any entries that
1107 -- get added by the traversal.
1109 Handle_Orphan_Type_References : declare
1117 pragma Warnings (Off, L);
1118 pragma Warnings (Off, R);
1120 procedure New_Entry (E : Entity_Id);
1121 -- Make an additional entry into the Xref table for a type entity
1122 -- that is related to the current entity (parent, type ancestor,
1123 -- progenitor, etc.).
1129 procedure New_Entry (E : Entity_Id) is
1132 and then not Has_Xref_Entry (E)
1133 and then Sloc (E) > No_Location
1135 Xrefs.Increment_Last;
1137 Loc := Original_Location (Sloc (E));
1138 Xrefs.Table (Indx).Ent := E;
1139 Xrefs.Table (Indx).Loc := No_Location;
1140 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
1141 Xrefs.Table (Indx).Lun := No_Unit;
1142 Set_Has_Xref_Entry (E);
1146 -- Start of processing for Handle_Orphan_Type_References
1149 -- Note that this is not a for loop for a very good reason. The
1150 -- processing of items in the table can add new items to the table,
1151 -- and they must be processed as well.
1154 while J <= Xrefs.Last loop
1155 Ent := Xrefs.Table (J).Ent;
1156 Get_Type_Reference (Ent, Tref, L, R);
1159 and then not Has_Xref_Entry (Tref)
1160 and then Sloc (Tref) > No_Location
1164 if Is_Record_Type (Ent)
1165 and then Present (Interfaces (Ent))
1167 -- Add an entry for each one of the given interfaces
1168 -- implemented by type Ent.
1171 Elmt : Elmt_Id := First_Elmt (Interfaces (Ent));
1173 while Present (Elmt) loop
1174 New_Entry (Node (Elmt));
1181 -- Collect inherited primitive operations that may be declared in
1182 -- another unit and have no visible reference in the current one.
1185 and then Is_Tagged_Type (Ent)
1186 and then Is_Derived_Type (Ent)
1187 and then Ent = Base_Type (Ent)
1188 and then In_Extended_Main_Source_Unit (Ent)
1191 Op_List : constant Elist_Id := Primitive_Operations (Ent);
1195 function Parent_Op (E : Entity_Id) return Entity_Id;
1196 -- Find original operation, which may be inherited through
1197 -- several derivations.
1199 function Parent_Op (E : Entity_Id) return Entity_Id is
1200 Orig_Op : constant Entity_Id := Alias (E);
1202 if No (Orig_Op) then
1204 elsif not Comes_From_Source (E)
1205 and then not Has_Xref_Entry (Orig_Op)
1206 and then Comes_From_Source (Orig_Op)
1210 return Parent_Op (Orig_Op);
1215 Op := First_Elmt (Op_List);
1216 while Present (Op) loop
1217 Prim := Parent_Op (Node (Op));
1219 if Present (Prim) then
1220 Xrefs.Increment_Last;
1222 Loc := Original_Location (Sloc (Prim));
1223 Xrefs.Table (Indx).Ent := Prim;
1224 Xrefs.Table (Indx).Loc := No_Location;
1225 Xrefs.Table (Indx).Eun :=
1226 Get_Source_Unit (Sloc (Prim));
1227 Xrefs.Table (Indx).Lun := No_Unit;
1228 Set_Has_Xref_Entry (Prim);
1238 end Handle_Orphan_Type_References;
1240 -- Now we have all the references, including those for any embedded
1241 -- type references, so we can sort them, and output them.
1243 Output_Refs : declare
1245 Nrefs : Nat := Xrefs.Last;
1246 -- Number of references in table. This value may get reset (reduced)
1247 -- when we eliminate duplicate reference entries.
1249 Rnums : array (0 .. Nrefs) of Nat;
1250 -- This array contains numbers of references in the Xrefs table.
1251 -- This list is sorted in output order. The extra 0'th entry is
1252 -- convenient for the call to sort. When we sort the table, we
1253 -- move the entries in Rnums around, but we do not move the
1254 -- original table entries.
1256 Curxu : Unit_Number_Type;
1257 -- Current xref unit
1259 Curru : Unit_Number_Type;
1260 -- Current reference unit for one entity
1262 Cursrc : Source_Buffer_Ptr;
1263 -- Current xref unit source text
1268 Curnam : String (1 .. Name_Buffer'Length);
1270 -- Simple name and length of current entity
1272 Curdef : Source_Ptr;
1273 -- Original source location for current entity
1276 -- Current reference location
1279 -- Entity type character
1285 -- Renaming reference
1287 Trunit : Unit_Number_Type;
1288 -- Unit number for type reference
1290 function Lt (Op1, Op2 : Natural) return Boolean;
1291 -- Comparison function for Sort call
1293 function Name_Change (X : Entity_Id) return Boolean;
1294 -- Determines if entity X has a different simple name from Curent
1296 procedure Move (From : Natural; To : Natural);
1297 -- Move procedure for Sort call
1299 package Sorting is new GNAT.Heap_Sort_G (Move, Lt);
1305 function Lt (Op1, Op2 : Natural) return Boolean is
1306 T1 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op1)));
1307 T2 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op2)));
1310 -- First test: if entity is in different unit, sort by unit
1312 if T1.Eun /= T2.Eun then
1313 return Dependency_Num (T1.Eun) < Dependency_Num (T2.Eun);
1315 -- Second test: within same unit, sort by entity Sloc
1317 elsif T1.Def /= T2.Def then
1318 return T1.Def < T2.Def;
1320 -- Third test: sort definitions ahead of references
1322 elsif T1.Loc = No_Location then
1325 elsif T2.Loc = No_Location then
1328 -- Fourth test: for same entity, sort by reference location unit
1330 elsif T1.Lun /= T2.Lun then
1331 return Dependency_Num (T1.Lun) < Dependency_Num (T2.Lun);
1333 -- Fifth test: order of location within referencing unit
1335 elsif T1.Loc /= T2.Loc then
1336 return T1.Loc < T2.Loc;
1338 -- Finally, for two locations at the same address, we prefer
1339 -- the one that does NOT have the type 'r' so that a modification
1340 -- or extension takes preference, when there are more than one
1341 -- reference at the same location.
1344 return T2.Typ = 'r';
1352 procedure Move (From : Natural; To : Natural) is
1354 Rnums (Nat (To)) := Rnums (Nat (From));
1361 -- Why a string comparison here??? Why not compare Name_Id values???
1363 function Name_Change (X : Entity_Id) return Boolean is
1365 Get_Unqualified_Name_String (Chars (X));
1367 if Name_Len /= Curlen then
1371 return Name_Buffer (1 .. Curlen) /= Curnam (1 .. Curlen);
1375 -- Start of processing for Output_Refs
1378 -- Capture the definition Sloc values. We delay doing this till now,
1379 -- since at the time the reference or definition is made, private
1380 -- types may be swapped, and the Sloc value may be incorrect. We
1381 -- also set up the pointer vector for the sort.
1383 for J in 1 .. Nrefs loop
1385 Xrefs.Table (J).Def :=
1386 Original_Location (Sloc (Xrefs.Table (J).Ent));
1389 -- Sort the references
1391 Sorting.Sort (Integer (Nrefs));
1393 -- Eliminate duplicate entries
1396 NR : constant Nat := Nrefs;
1399 -- We need this test for NR because if we force ALI file
1400 -- generation in case of errors detected, it may be the case
1401 -- that Nrefs is 0, so we should not reset it here
1406 for J in 2 .. NR loop
1407 if Xrefs.Table (Rnums (J)) /=
1408 Xrefs.Table (Rnums (Nrefs))
1411 Rnums (Nrefs) := Rnums (J);
1417 -- Initialize loop through references
1421 Curdef := No_Location;
1423 Crloc := No_Location;
1425 -- Loop to output references
1427 for Refno in 1 .. Nrefs loop
1428 Output_One_Ref : declare
1434 pragma Warnings (Off, WC);
1435 pragma Warnings (Off, Err);
1437 XE : Xref_Entry renames Xrefs.Table (Rnums (Refno));
1438 -- The current entry to be accessed
1441 -- Used to index into source buffer to get entity name
1445 -- Used for {} or <> or () for type reference
1447 procedure Check_Type_Reference
1449 List_Interface : Boolean);
1450 -- Find whether there is a meaningful type reference for
1451 -- Ent, and display it accordingly. If List_Interface is
1452 -- true, then Ent is a progenitor interface of the current
1453 -- type entity being listed. In that case list it as is,
1454 -- without looking for a type reference for it.
1456 procedure Output_Instantiation_Refs (Loc : Source_Ptr);
1457 -- Recursive procedure to output instantiation references for
1458 -- the given source ptr in [file|line[...]] form. No output
1459 -- if the given location is not a generic template reference.
1461 procedure Output_Overridden_Op (Old_E : Entity_Id);
1462 -- For a subprogram that is overriding, display information
1463 -- about the inherited operation that it overrides.
1465 --------------------------
1466 -- Check_Type_Reference --
1467 --------------------------
1469 procedure Check_Type_Reference
1471 List_Interface : Boolean)
1474 if List_Interface then
1476 -- This is a progenitor interface of the type for which
1477 -- xref information is being generated.
1484 Get_Type_Reference (Ent, Tref, Left, Right);
1487 if Present (Tref) then
1489 -- Case of standard entity, output name
1491 if Sloc (Tref) = Standard_Location then
1492 Write_Info_Char (Left);
1493 Write_Info_Name (Chars (Tref));
1494 Write_Info_Char (Right);
1496 -- Case of source entity, output location
1499 Write_Info_Char (Left);
1500 Trunit := Get_Source_Unit (Sloc (Tref));
1502 if Trunit /= Curxu then
1503 Write_Info_Nat (Dependency_Num (Trunit));
1504 Write_Info_Char ('|');
1508 (Int (Get_Logical_Line_Number (Sloc (Tref))));
1516 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1519 and then Present (Full_View (Ent))
1521 Ent := Underlying_Type (Ent);
1523 if Present (Ent) then
1524 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1528 Write_Info_Char (Ctyp);
1532 (Int (Get_Column_Number (Sloc (Tref))));
1534 -- If the type comes from an instantiation, add the
1535 -- corresponding info.
1537 Output_Instantiation_Refs (Sloc (Tref));
1538 Write_Info_Char (Right);
1541 end Check_Type_Reference;
1543 -------------------------------
1544 -- Output_Instantiation_Refs --
1545 -------------------------------
1547 procedure Output_Instantiation_Refs (Loc : Source_Ptr) is
1548 Iloc : constant Source_Ptr := Instantiation_Location (Loc);
1549 Lun : Unit_Number_Type;
1550 Cu : constant Unit_Number_Type := Curru;
1553 -- Nothing to do if this is not an instantiation
1555 if Iloc = No_Location then
1559 -- Output instantiation reference
1561 Write_Info_Char ('[');
1562 Lun := Get_Source_Unit (Iloc);
1564 if Lun /= Curru then
1566 Write_Info_Nat (Dependency_Num (Curru));
1567 Write_Info_Char ('|');
1570 Write_Info_Nat (Int (Get_Logical_Line_Number (Iloc)));
1572 -- Recursive call to get nested instantiations
1574 Output_Instantiation_Refs (Iloc);
1576 -- Output final ] after call to get proper nesting
1578 Write_Info_Char (']');
1581 end Output_Instantiation_Refs;
1583 --------------------------
1584 -- Output_Overridden_Op --
1585 --------------------------
1587 procedure Output_Overridden_Op (Old_E : Entity_Id) is
1591 -- The overridden operation has an implicit declaration
1592 -- at the point of derivation. What we want to display
1593 -- is the original operation, which has the actual body
1594 -- (or abstract declaration) that is being overridden.
1595 -- The overridden operation is not always set, e.g. when
1596 -- it is a predefined operator.
1601 elsif Present (Alias (Old_E)) then
1602 Op := Alias (Old_E);
1609 and then Sloc (Op) /= Standard_Location
1612 Loc : constant Source_Ptr := Sloc (Op);
1613 Par_Unit : constant Unit_Number_Type :=
1614 Get_Source_Unit (Loc);
1617 Write_Info_Char ('<');
1619 if Par_Unit /= Curxu then
1620 Write_Info_Nat (Dependency_Num (Par_Unit));
1621 Write_Info_Char ('|');
1624 Write_Info_Nat (Int (Get_Logical_Line_Number (Loc)));
1625 Write_Info_Char ('p');
1626 Write_Info_Nat (Int (Get_Column_Number (Loc)));
1627 Write_Info_Char ('>');
1630 end Output_Overridden_Op;
1632 -- Start of processing for Output_One_Ref
1636 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1638 -- Skip reference if it is the only reference to an entity,
1639 -- and it is an END line reference, and the entity is not in
1640 -- the current extended source. This prevents junk entries
1641 -- consisting only of packages with END lines, where no
1642 -- entity from the package is actually referenced.
1645 and then Ent /= Curent
1646 and then (Refno = Nrefs or else
1647 Ent /= Xrefs.Table (Rnums (Refno + 1)).Ent)
1649 not In_Extended_Main_Source_Unit (Ent)
1654 -- For private type, get full view type
1657 and then Present (Full_View (XE.Ent))
1659 Ent := Underlying_Type (Ent);
1661 if Present (Ent) then
1662 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1666 -- Special exception for Boolean
1668 if Ctyp = 'E' and then Is_Boolean_Type (Ent) then
1672 -- For variable reference, get corresponding type
1675 Ent := Etype (XE.Ent);
1676 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1678 -- If variable is private type, get full view type
1681 and then Present (Full_View (Etype (XE.Ent)))
1683 Ent := Underlying_Type (Etype (XE.Ent));
1685 if Present (Ent) then
1686 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1689 elsif Is_Generic_Type (Ent) then
1691 -- If the type of the entity is a generic private type,
1692 -- there is no usable full view, so retain the indication
1693 -- that this is an object.
1698 -- Special handling for access parameter
1701 K : constant Entity_Kind := Ekind (Etype (XE.Ent));
1704 if (K = E_Anonymous_Access_Type
1706 K = E_Anonymous_Access_Subprogram_Type
1708 E_Anonymous_Access_Protected_Subprogram_Type)
1709 and then Is_Formal (XE.Ent)
1713 -- Special handling for Boolean
1715 elsif Ctyp = 'e' and then Is_Boolean_Type (Ent) then
1721 -- Special handling for abstract types and operations
1723 if Is_Overloadable (XE.Ent)
1724 and then Is_Abstract_Subprogram (XE.Ent)
1727 Ctyp := 'x'; -- Abstract procedure
1729 elsif Ctyp = 'V' then
1730 Ctyp := 'y'; -- Abstract function
1733 elsif Is_Type (XE.Ent)
1734 and then Is_Abstract_Type (XE.Ent)
1736 if Is_Interface (XE.Ent) then
1739 elsif Ctyp = 'R' then
1740 Ctyp := 'H'; -- Abstract type
1744 -- Only output reference if interesting type of entity, and
1745 -- suppress self references, except for bodies that act as
1746 -- specs. Also suppress definitions of body formals (we only
1747 -- treat these as references, and the references were
1748 -- separately recorded).
1751 or else (XE.Loc = XE.Def
1754 or else not Is_Subprogram (XE.Ent)))
1755 or else (Is_Formal (XE.Ent)
1756 and then Present (Spec_Entity (XE.Ent)))
1761 -- Start new Xref section if new xref unit
1763 if XE.Eun /= Curxu then
1764 if Write_Info_Col > 1 then
1769 Cursrc := Source_Text (Source_Index (Curxu));
1771 Write_Info_Initiate ('X');
1772 Write_Info_Char (' ');
1773 Write_Info_Nat (Dependency_Num (XE.Eun));
1774 Write_Info_Char (' ');
1775 Write_Info_Name (Reference_Name (Source_Index (XE.Eun)));
1778 -- Start new Entity line if new entity. Note that we
1779 -- consider two entities the same if they have the same
1780 -- name and source location. This causes entities in
1781 -- instantiations to be treated as though they referred
1788 (Name_Change (XE.Ent) or else XE.Def /= Curdef))
1793 Get_Unqualified_Name_String (Chars (XE.Ent));
1795 Curnam (1 .. Curlen) := Name_Buffer (1 .. Curlen);
1797 if Write_Info_Col > 1 then
1801 -- Write column number information
1803 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Def)));
1804 Write_Info_Char (Ctyp);
1805 Write_Info_Nat (Int (Get_Column_Number (XE.Def)));
1807 -- Write level information
1809 Write_Level_Info : declare
1810 function Is_Visible_Generic_Entity
1811 (E : Entity_Id) return Boolean;
1812 -- Check whether E is declared in the visible part
1813 -- of a generic package. For source navigation
1814 -- purposes, treat this as a visible entity.
1816 function Is_Private_Record_Component
1817 (E : Entity_Id) return Boolean;
1818 -- Check whether E is a non-inherited component of a
1819 -- private extension. Even if the enclosing record is
1820 -- public, we want to treat the component as private
1821 -- for navigation purposes.
1823 ---------------------------------
1824 -- Is_Private_Record_Component --
1825 ---------------------------------
1827 function Is_Private_Record_Component
1828 (E : Entity_Id) return Boolean
1830 S : constant Entity_Id := Scope (E);
1833 Ekind (E) = E_Component
1834 and then Nkind (Declaration_Node (S)) =
1835 N_Private_Extension_Declaration
1836 and then Original_Record_Component (E) = E;
1837 end Is_Private_Record_Component;
1839 -------------------------------
1840 -- Is_Visible_Generic_Entity --
1841 -------------------------------
1843 function Is_Visible_Generic_Entity
1844 (E : Entity_Id) return Boolean
1849 -- The Present check here is an error defense
1851 if Present (Scope (E))
1852 and then Ekind (Scope (E)) /= E_Generic_Package
1858 while Present (Par) loop
1860 Nkind (Par) = N_Generic_Package_Declaration
1862 -- Entity is a generic formal
1867 Nkind (Parent (Par)) = N_Package_Specification
1870 Is_List_Member (Par)
1871 and then List_Containing (Par) =
1872 Visible_Declarations (Parent (Par));
1874 Par := Parent (Par);
1879 end Is_Visible_Generic_Entity;
1881 -- Start of processing for Write_Level_Info
1884 if Is_Hidden (Curent)
1885 or else Is_Private_Record_Component (Curent)
1887 Write_Info_Char (' ');
1891 or else Is_Visible_Generic_Entity (Curent)
1893 Write_Info_Char ('*');
1896 Write_Info_Char (' ');
1898 end Write_Level_Info;
1900 -- Output entity name. We use the occurrence from the
1901 -- actual source program at the definition point.
1903 P := Original_Location (Sloc (XE.Ent));
1905 -- Entity is character literal
1907 if Cursrc (P) = ''' then
1908 Write_Info_Char (Cursrc (P));
1909 Write_Info_Char (Cursrc (P + 1));
1910 Write_Info_Char (Cursrc (P + 2));
1912 -- Entity is operator symbol
1914 elsif Cursrc (P) = '"' or else Cursrc (P) = '%' then
1915 Write_Info_Char (Cursrc (P));
1920 Write_Info_Char (Cursrc (P2));
1921 exit when Cursrc (P2) = Cursrc (P);
1924 -- Entity is identifier
1928 if Is_Start_Of_Wide_Char (Cursrc, P) then
1929 Scan_Wide (Cursrc, P, WC, Err);
1930 elsif not Identifier_Char (Cursrc (P)) then
1937 -- Write out the identifier by copying the exact
1938 -- source characters used in its declaration. Note
1939 -- that this means wide characters will be in their
1940 -- original encoded form.
1943 Original_Location (Sloc (XE.Ent)) .. P - 1
1945 Write_Info_Char (Cursrc (J));
1949 -- See if we have a renaming reference
1951 if Is_Object (XE.Ent)
1952 and then Present (Renamed_Object (XE.Ent))
1954 Rref := Renamed_Object (XE.Ent);
1956 elsif Is_Overloadable (XE.Ent)
1957 and then Nkind (Parent (Declaration_Node (XE.Ent))) =
1958 N_Subprogram_Renaming_Declaration
1960 Rref := Name (Parent (Declaration_Node (XE.Ent)));
1962 elsif Ekind (XE.Ent) = E_Package
1963 and then Nkind (Declaration_Node (XE.Ent)) =
1964 N_Package_Renaming_Declaration
1966 Rref := Name (Declaration_Node (XE.Ent));
1972 if Present (Rref) then
1973 if Nkind (Rref) = N_Expanded_Name then
1974 Rref := Selector_Name (Rref);
1977 if Nkind (Rref) = N_Identifier
1978 or else Nkind (Rref) = N_Operator_Symbol
1982 -- For renamed array components, use the array name
1983 -- for the renamed entity, which reflect the fact that
1984 -- in general the whole array is aliased.
1986 elsif Nkind (Rref) = N_Indexed_Component then
1987 if Nkind (Prefix (Rref)) = N_Identifier then
1988 Rref := Prefix (Rref);
1989 elsif Nkind (Prefix (Rref)) = N_Expanded_Name then
1990 Rref := Selector_Name (Prefix (Rref));
2000 -- Write out renaming reference if we have one
2002 if Present (Rref) then
2003 Write_Info_Char ('=');
2005 (Int (Get_Logical_Line_Number (Sloc (Rref))));
2006 Write_Info_Char (':');
2008 (Int (Get_Column_Number (Sloc (Rref))));
2011 -- Indicate that the entity is in the unit of the current
2016 -- Write out information about generic parent, if entity
2019 if Is_Generic_Instance (XE.Ent) then
2021 Gen_Par : constant Entity_Id :=
2024 (Unit_Declaration_Node (XE.Ent)));
2025 Loc : constant Source_Ptr := Sloc (Gen_Par);
2026 Gen_U : constant Unit_Number_Type :=
2027 Get_Source_Unit (Loc);
2030 Write_Info_Char ('[');
2031 if Curru /= Gen_U then
2032 Write_Info_Nat (Dependency_Num (Gen_U));
2033 Write_Info_Char ('|');
2037 (Int (Get_Logical_Line_Number (Loc)));
2038 Write_Info_Char (']');
2042 -- See if we have a type reference and if so output
2044 Check_Type_Reference (XE.Ent, False);
2046 -- Additional information for types with progenitors
2048 if Is_Record_Type (XE.Ent)
2049 and then Present (Interfaces (XE.Ent))
2052 Elmt : Elmt_Id := First_Elmt (Interfaces (XE.Ent));
2054 while Present (Elmt) loop
2055 Check_Type_Reference (Node (Elmt), True);
2060 -- For array types, list index types as well.
2061 -- (This is not C, indices have distinct types).
2063 elsif Is_Array_Type (XE.Ent) then
2067 Indx := First_Index (XE.Ent);
2068 while Present (Indx) loop
2069 Check_Type_Reference
2070 (First_Subtype (Etype (Indx)), True);
2076 -- If the entity is an overriding operation, write info
2077 -- on operation that was overridden.
2079 if Is_Subprogram (XE.Ent)
2080 and then Is_Overriding_Operation (XE.Ent)
2082 Output_Overridden_Op (Overridden_Operation (XE.Ent));
2085 -- End of processing for entity output
2087 Crloc := No_Location;
2090 -- Output the reference
2092 if XE.Loc /= No_Location
2093 and then XE.Loc /= Crloc
2097 -- Start continuation if line full, else blank
2099 if Write_Info_Col > 72 then
2101 Write_Info_Initiate ('.');
2104 Write_Info_Char (' ');
2106 -- Output file number if changed
2108 if XE.Lun /= Curru then
2110 Write_Info_Nat (Dependency_Num (Curru));
2111 Write_Info_Char ('|');
2114 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Loc)));
2115 Write_Info_Char (XE.Typ);
2117 if Is_Overloadable (XE.Ent)
2118 and then Is_Imported (XE.Ent)
2119 and then XE.Typ = 'b'
2121 Output_Import_Export_Info (XE.Ent);
2124 Write_Info_Nat (Int (Get_Column_Number (XE.Loc)));
2126 Output_Instantiation_Refs (Sloc (XE.Ent));
2137 end Output_References;