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_Prag; use Sem_Prag;
37 with Sem_Util; use Sem_Util;
38 with Sem_Warn; use Sem_Warn;
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;
47 with GNAT.Heap_Sort_G;
49 package body Lib.Xref is
55 -- The Xref table is used to record references. The Loc field is set
56 -- to No_Location for a definition entry.
58 subtype Xref_Entry_Number is Int;
60 type Xref_Entry is record
62 -- Entity referenced (E parameter to Generate_Reference)
65 -- Original source location for entity being referenced. Note that these
66 -- values are used only during the output process, they are not set when
67 -- the entries are originally built. This is because private entities
68 -- can be swapped when the initial call is made.
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.
76 -- Reference type (Typ param to Generate_Reference)
78 Eun : Unit_Number_Type;
79 -- Unit number corresponding to Ent
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.
87 package Xrefs is new Table.Table (
88 Table_Component_Type => Xref_Entry,
89 Table_Index_Type => Xref_Entry_Number,
91 Table_Initial => Alloc.Xrefs_Initial,
92 Table_Increment => Alloc.Xrefs_Increment,
93 Table_Name => "Xrefs");
95 -------------------------
96 -- Generate_Definition --
97 -------------------------
99 procedure Generate_Definition (E : Entity_Id) is
104 pragma Assert (Nkind (E) in N_Entity);
106 -- Note that we do not test Xref_Entity_Letters here. It is too early
107 -- to do so, since we are often called before the entity is fully
108 -- constructed, so that the Ekind is still E_Void.
112 -- Definition must come from source
114 -- We make an exception for subprogram child units that have no spec.
115 -- For these we generate a subprogram declaration for library use,
116 -- and the corresponding entity does not come from source.
117 -- Nevertheless, all references will be attached to it and we have
118 -- to treat is as coming from user code.
120 and then (Comes_From_Source (E) or else Is_Child_Unit (E))
122 -- And must have a reasonable source location that is not
123 -- within an instance (all entities in instances are ignored)
125 and then Sloc (E) > No_Location
126 and then Instantiation_Location (Sloc (E)) = No_Location
128 -- And must be a non-internal name from the main source unit
130 and then In_Extended_Main_Source_Unit (E)
131 and then not Is_Internal_Name (Chars (E))
133 Xrefs.Increment_Last;
135 Loc := Original_Location (Sloc (E));
137 Xrefs.Table (Indx).Ent := E;
138 Xrefs.Table (Indx).Def := No_Location;
139 Xrefs.Table (Indx).Loc := No_Location;
140 Xrefs.Table (Indx).Typ := ' ';
141 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
142 Xrefs.Table (Indx).Lun := No_Unit;
143 Set_Has_Xref_Entry (E);
145 if In_Inlined_Body then
149 end Generate_Definition;
151 ---------------------------------
152 -- Generate_Operator_Reference --
153 ---------------------------------
155 procedure Generate_Operator_Reference
160 if not In_Extended_Main_Source_Unit (N) then
164 -- If the operator is not a Standard operator, then we generate a real
165 -- reference to the user defined operator.
167 if Sloc (Entity (N)) /= Standard_Location then
168 Generate_Reference (Entity (N), N);
170 -- A reference to an implicit inequality operator is also a reference
171 -- to the user-defined equality.
173 if Nkind (N) = N_Op_Ne
174 and then not Comes_From_Source (Entity (N))
175 and then Present (Corresponding_Equality (Entity (N)))
177 Generate_Reference (Corresponding_Equality (Entity (N)), N);
180 -- For the case of Standard operators, we mark the result type as
181 -- referenced. This ensures that in the case where we are using a
182 -- derived operator, we mark an entity of the unit that implicitly
183 -- defines this operator as used. Otherwise we may think that no entity
184 -- of the unit is used. The actual entity marked as referenced is the
185 -- first subtype, which is the relevant user defined entity.
187 -- Note: we only do this for operators that come from source. The
188 -- generated code sometimes reaches for entities that do not need to be
189 -- explicitly visible (for example, when we expand the code for
190 -- comparing two record objects, the fields of the record may not be
193 elsif Comes_From_Source (N) then
194 Set_Referenced (First_Subtype (T));
196 end Generate_Operator_Reference;
198 ------------------------
199 -- Generate_Reference --
200 ------------------------
202 procedure Generate_Reference
205 Typ : Character := 'r';
206 Set_Ref : Boolean := True;
207 Force : Boolean := False)
217 -- Used for call to Find_Actual
220 -- If Formal is non-Empty, then its Ekind, otherwise E_Void
222 function Is_On_LHS (Node : Node_Id) return Boolean;
223 -- Used to check if a node is on the left hand side of an assignment.
224 -- The following cases are handled:
226 -- Variable Node is a direct descendant of left hand side of an
227 -- assignment statement.
229 -- Prefix Of an indexed or selected component that is present in
230 -- a subtree rooted by an assignment statement. There is
231 -- no restriction of nesting of components, thus cases
232 -- such as A.B (C).D are handled properly. However a prefix
233 -- of a dereference (either implicit or explicit) is never
234 -- considered as on a LHS.
236 -- Out param Same as above cases, but OUT parameter
238 function OK_To_Set_Referenced return Boolean;
239 -- Returns True if the Referenced flag can be set. There are a few
240 -- exceptions where we do not want to set this flag, see body for
241 -- details of these exceptional cases.
247 -- ??? There are several routines here and there that perform a similar
248 -- (but subtly different) computation, which should be factored:
250 -- Sem_Util.May_Be_Lvalue
251 -- Sem_Util.Known_To_Be_Assigned
252 -- Exp_Ch2.Expand_Entry_Parameter.In_Assignment_Context
253 -- Exp_Smem.Is_Out_Actual
255 function Is_On_LHS (Node : Node_Id) return Boolean is
261 -- Only identifiers are considered, is this necessary???
263 if Nkind (Node) /= N_Identifier then
267 -- Immediate return if appeared as OUT parameter
269 if Kind = E_Out_Parameter then
273 -- Search for assignment statement subtree root
280 if K = N_Assignment_Statement then
283 -- Check whether the parent is a component and the current node is
284 -- its prefix, but return False if the current node has an access
285 -- type, as in that case the selected or indexed component is an
286 -- implicit dereference, and the LHS is the designated object, not
287 -- the access object.
289 -- ??? case of a slice assignment?
291 -- ??? Note that in some cases this is called too early
292 -- (see comments in Sem_Ch8.Find_Direct_Name), at a point where
293 -- the tree is not fully typed yet. In that case we may lack
294 -- an Etype for N, and we must disable the check for an implicit
295 -- dereference. If the dereference is on an LHS, this causes a
298 elsif (K = N_Selected_Component or else K = N_Indexed_Component)
299 and then Prefix (P) = N
300 and then not (Present (Etype (N))
302 Is_Access_Type (Etype (N)))
306 -- All other cases, definitely not on left side
314 ---------------------------
315 -- OK_To_Set_Referenced --
316 ---------------------------
318 function OK_To_Set_Referenced return Boolean is
322 -- A reference from a pragma Unreferenced or pragma Unmodified or
323 -- pragma Warnings does not cause the Referenced flag to be set.
324 -- This avoids silly warnings about things being referenced and
325 -- not assigned when the only reference is from the pragma.
327 if Nkind (N) = N_Identifier then
330 if Nkind (P) = N_Pragma_Argument_Association then
333 if Nkind (P) = N_Pragma then
334 if Pragma_Name (P) = Name_Warnings
336 Pragma_Name (P) = Name_Unmodified
338 Pragma_Name (P) = Name_Unreferenced
347 end OK_To_Set_Referenced;
349 -- Start of processing for Generate_Reference
352 pragma Assert (Nkind (E) in N_Entity);
353 Find_Actual (N, Formal, Call);
355 if Present (Formal) then
356 Kind := Ekind (Formal);
361 -- Check for obsolescent reference to package ASCII. GNAT treats this
362 -- element of annex J specially since in practice, programs make a lot
363 -- of use of this feature, so we don't include it in the set of features
364 -- diagnosed when Warn_On_Obsolescent_Features mode is set. However we
365 -- are required to note it as a violation of the RM defined restriction.
367 if E = Standard_ASCII then
368 Check_Restriction (No_Obsolescent_Features, N);
371 -- Check for reference to entity marked with Is_Obsolescent
373 -- Note that we always allow obsolescent references in the compiler
374 -- itself and the run time, since we assume that we know what we are
375 -- doing in such cases. For example the calls in Ada.Characters.Handling
376 -- to its own obsolescent subprograms are just fine.
378 -- In any case we do not generate warnings within the extended source
379 -- unit of the entity in question, since we assume the source unit
380 -- itself knows what is going on (and for sure we do not want silly
381 -- warnings, e.g. on the end line of an obsolescent procedure body).
383 if Is_Obsolescent (E)
384 and then not GNAT_Mode
385 and then not In_Extended_Main_Source_Unit (E)
387 Check_Restriction (No_Obsolescent_Features, N);
389 if Warn_On_Obsolescent_Feature then
390 Output_Obsolescent_Entity_Warnings (N, E);
394 -- Warn if reference to Ada 2005 entity not in Ada 2005 mode. We only
395 -- detect real explicit references (modifications and references).
397 if Comes_From_Source (N)
398 and then Is_Ada_2005_Only (E)
399 and then Ada_Version < Ada_05
400 and then Warn_On_Ada_2005_Compatibility
401 and then (Typ = 'm' or else Typ = 'r')
403 Error_Msg_NE ("& is only defined in Ada 2005?", N, E);
406 -- Never collect references if not in main source unit. However, we omit
407 -- this test if Typ is 'e' or 'k', since these entries are structural,
408 -- and it is useful to have them in units that reference packages as
409 -- well as units that define packages. We also omit the test for the
410 -- case of 'p' since we want to include inherited primitive operations
411 -- from other packages.
413 -- We also omit this test is this is a body reference for a subprogram
414 -- instantiation. In this case the reference is to the generic body,
415 -- which clearly need not be in the main unit containing the instance.
416 -- For the same reason we accept an implicit reference generated for
417 -- a default in an instance.
419 if not In_Extended_Main_Source_Unit (N) then
424 or else (Typ = 'b' and then Is_Generic_Instance (E))
432 -- For reference type p, the entity must be in main source unit
434 if Typ = 'p' and then not In_Extended_Main_Source_Unit (E) then
438 -- Unless the reference is forced, we ignore references where the
439 -- reference itself does not come from source.
441 if not Force and then not Comes_From_Source (N) then
445 -- Deal with setting entity as referenced, unless suppressed. Note that
446 -- we still do Set_Referenced on entities that do not come from source.
447 -- This situation arises when we have a source reference to a derived
448 -- operation, where the derived operation itself does not come from
449 -- source, but we still want to mark it as referenced, since we really
450 -- are referencing an entity in the corresponding package (this avoids
451 -- wrong complaints that the package contains no referenced entities).
455 -- Assignable object appearing on left side of assignment or as
459 and then Is_On_LHS (N)
460 and then Ekind (E) /= E_In_Out_Parameter
462 -- For objects that are renamings, just set as simply referenced
463 -- we do not try to do assignment type tracking in this case.
465 if Present (Renamed_Object (E)) then
468 -- Out parameter case
470 elsif Kind = E_Out_Parameter then
472 -- If warning mode for all out parameters is set, or this is
473 -- the only warning parameter, then we want to mark this for
474 -- later warning logic by setting Referenced_As_Out_Parameter
476 if Warn_On_Modified_As_Out_Parameter (Formal) then
477 Set_Referenced_As_Out_Parameter (E, True);
478 Set_Referenced_As_LHS (E, False);
480 -- For OUT parameter not covered by the above cases, we simply
481 -- regard it as a normal reference (in this case we do not
482 -- want any of the warning machinery for out parameters).
488 -- For the left hand of an assignment case, we do nothing here.
489 -- The processing for Analyze_Assignment_Statement will set the
490 -- Referenced_As_LHS flag.
496 -- Check for a reference in a pragma that should not count as a
497 -- making the variable referenced for warning purposes.
499 elsif Is_Non_Significant_Pragma_Reference (N) then
502 -- A reference in an attribute definition clause does not count as a
503 -- reference except for the case of Address. The reason that 'Address
504 -- is an exception is that it creates an alias through which the
505 -- variable may be referenced.
507 elsif Nkind (Parent (N)) = N_Attribute_Definition_Clause
508 and then Chars (Parent (N)) /= Name_Address
509 and then N = Name (Parent (N))
513 -- Constant completion does not count as a reference
516 and then Ekind (E) = E_Constant
520 -- Record representation clause does not count as a reference
522 elsif Nkind (N) = N_Identifier
523 and then Nkind (Parent (N)) = N_Record_Representation_Clause
527 -- Discriminants do not need to produce a reference to record type
530 and then Nkind (Parent (N)) = N_Discriminant_Specification
537 -- Special processing for IN OUT parameters, where we have an
538 -- implicit assignment to a simple variable.
540 if Kind = E_In_Out_Parameter
541 and then Is_Assignable (E)
543 -- For sure this counts as a normal read reference
546 Set_Last_Assignment (E, Empty);
548 -- We count it as being referenced as an out parameter if the
549 -- option is set to warn on all out parameters, except that we
550 -- have a special exclusion for an intrinsic subprogram, which
551 -- is most likely an instantiation of Unchecked_Deallocation
552 -- which we do not want to consider as an assignment since it
553 -- generates false positives. We also exclude the case of an
554 -- IN OUT parameter if the name of the procedure is Free,
555 -- since we suspect similar semantics.
557 if Warn_On_All_Unread_Out_Parameters
558 and then Is_Entity_Name (Name (Call))
559 and then not Is_Intrinsic_Subprogram (Entity (Name (Call)))
560 and then Chars (Name (Call)) /= Name_Free
562 Set_Referenced_As_Out_Parameter (E, True);
563 Set_Referenced_As_LHS (E, False);
566 -- Any other occurrence counts as referencing the entity
568 elsif OK_To_Set_Referenced then
571 -- If variable, this is an OK reference after an assignment
572 -- so we can clear the Last_Assignment indication.
574 if Is_Assignable (E) then
575 Set_Last_Assignment (E, Empty);
580 -- Check for pragma Unreferenced given and reference is within
581 -- this source unit (occasion for possible warning to be issued).
583 if Has_Pragma_Unreferenced (E)
584 and then In_Same_Extended_Unit (E, N)
586 -- A reference as a named parameter in a call does not count
587 -- as a violation of pragma Unreferenced for this purpose...
589 if Nkind (N) = N_Identifier
590 and then Nkind (Parent (N)) = N_Parameter_Association
591 and then Selector_Name (Parent (N)) = N
595 -- ... Neither does a reference to a variable on the left side
598 elsif Is_On_LHS (N) then
601 -- For entry formals, we want to place the warning message on the
602 -- corresponding entity in the accept statement. The current scope
603 -- is the body of the accept, so we find the formal whose name
604 -- matches that of the entry formal (there is no link between the
605 -- two entities, and the one in the accept statement is only used
606 -- for conformance checking).
608 elsif Ekind (Scope (E)) = E_Entry then
613 BE := First_Entity (Current_Scope);
614 while Present (BE) loop
615 if Chars (BE) = Chars (E) then
617 ("?pragma Unreferenced given for&!", N, BE);
625 -- Here we issue the warning, since this is a real reference
628 Error_Msg_NE ("?pragma Unreferenced given for&!", N, E);
632 -- If this is a subprogram instance, mark as well the internal
633 -- subprogram in the wrapper package, which may be a visible
636 if Is_Overloadable (E)
637 and then Is_Generic_Instance (E)
638 and then Present (Alias (E))
640 Set_Referenced (Alias (E));
644 -- Generate reference if all conditions are met:
647 -- Cross referencing must be active
651 -- The entity must be one for which we collect references
653 and then Xref_Entity_Letters (Ekind (E)) /= ' '
655 -- Both Sloc values must be set to something sensible
657 and then Sloc (E) > No_Location
658 and then Sloc (N) > No_Location
660 -- We ignore references from within an instance
662 and then Instantiation_Location (Sloc (N)) = No_Location
664 -- Ignore dummy references
668 if Nkind (N) = N_Identifier
670 Nkind (N) = N_Defining_Identifier
674 Nkind (N) = N_Defining_Operator_Symbol
676 Nkind (N) = N_Operator_Symbol
678 (Nkind (N) = N_Character_Literal
679 and then Sloc (Entity (N)) /= Standard_Location)
681 Nkind (N) = N_Defining_Character_Literal
685 elsif Nkind (N) = N_Expanded_Name
687 Nkind (N) = N_Selected_Component
689 Nod := Selector_Name (N);
695 -- Normal case of source entity comes from source
697 if Comes_From_Source (E) then
700 -- Entity does not come from source, but is a derived subprogram and
701 -- the derived subprogram comes from source (after one or more
702 -- derivations) in which case the reference is to parent subprogram.
704 elsif Is_Overloadable (E)
705 and then Present (Alias (E))
708 while not Comes_From_Source (Ent) loop
709 if No (Alias (Ent)) then
716 -- The internally created defining entity for a child subprogram
717 -- that has no previous spec has valid references.
719 elsif Is_Overloadable (E)
720 and then Is_Child_Unit (E)
724 -- Record components of discriminated subtypes or derived types must
725 -- be treated as references to the original component.
727 elsif Ekind (E) = E_Component
728 and then Comes_From_Source (Original_Record_Component (E))
730 Ent := Original_Record_Component (E);
732 -- If this is an expanded reference to a discriminant, recover the
733 -- original discriminant, which gets the reference.
735 elsif Ekind (E) = E_In_Parameter
736 and then Present (Discriminal_Link (E))
738 Ent := Discriminal_Link (E);
739 Set_Referenced (Ent);
741 -- Ignore reference to any other entity that is not from source
747 -- Record reference to entity
749 Ref := Original_Location (Sloc (Nod));
750 Def := Original_Location (Sloc (Ent));
752 Xrefs.Increment_Last;
755 Xrefs.Table (Indx).Loc := Ref;
757 -- Overriding operations are marked with 'P'
760 and then Is_Subprogram (N)
761 and then Is_Overriding_Operation (N)
763 Xrefs.Table (Indx).Typ := 'P';
765 Xrefs.Table (Indx).Typ := Typ;
768 Xrefs.Table (Indx).Eun := Get_Source_Unit (Def);
769 Xrefs.Table (Indx).Lun := Get_Source_Unit (Ref);
770 Xrefs.Table (Indx).Ent := Ent;
771 Set_Has_Xref_Entry (Ent);
773 end Generate_Reference;
775 -----------------------------------
776 -- Generate_Reference_To_Formals --
777 -----------------------------------
779 procedure Generate_Reference_To_Formals (E : Entity_Id) is
783 if Is_Generic_Subprogram (E) then
784 Formal := First_Entity (E);
786 while Present (Formal)
787 and then not Is_Formal (Formal)
789 Next_Entity (Formal);
793 Formal := First_Formal (E);
796 while Present (Formal) loop
797 if Ekind (Formal) = E_In_Parameter then
799 if Nkind (Parameter_Type (Parent (Formal)))
800 = N_Access_Definition
802 Generate_Reference (E, Formal, '^', False);
804 Generate_Reference (E, Formal, '>', False);
807 elsif Ekind (Formal) = E_In_Out_Parameter then
808 Generate_Reference (E, Formal, '=', False);
811 Generate_Reference (E, Formal, '<', False);
814 Next_Formal (Formal);
816 end Generate_Reference_To_Formals;
818 -------------------------------------------
819 -- Generate_Reference_To_Generic_Formals --
820 -------------------------------------------
822 procedure Generate_Reference_To_Generic_Formals (E : Entity_Id) is
826 Formal := First_Entity (E);
827 while Present (Formal) loop
828 if Comes_From_Source (Formal) then
829 Generate_Reference (E, Formal, 'z', False);
832 Next_Entity (Formal);
834 end Generate_Reference_To_Generic_Formals;
840 procedure Initialize is
845 -----------------------
846 -- Output_References --
847 -----------------------
849 procedure Output_References is
851 procedure Get_Type_Reference
853 Tref : out Entity_Id;
854 Left : out Character;
855 Right : out Character);
856 -- Given an Entity_Id Ent, determines whether a type reference is
857 -- required. If so, Tref is set to the entity for the type reference
858 -- and Left and Right are set to the left/right brackets to be output
859 -- for the reference. If no type reference is required, then Tref is
860 -- set to Empty, and Left/Right are set to space.
862 procedure Output_Import_Export_Info (Ent : Entity_Id);
863 -- Output language and external name information for an interfaced
864 -- entity, using the format <language, external_name>,
866 ------------------------
867 -- Get_Type_Reference --
868 ------------------------
870 procedure Get_Type_Reference
872 Tref : out Entity_Id;
873 Left : out Character;
874 Right : out Character)
879 -- See if we have a type reference
888 -- Processing for types
890 if Is_Type (Tref) then
894 if Base_Type (Tref) = Tref then
896 -- If derived, then get first subtype
898 if Tref /= Etype (Tref) then
899 Tref := First_Subtype (Etype (Tref));
901 -- Set brackets for derived type, but don't override
902 -- pointer case since the fact that something is a
903 -- pointer is more important.
910 -- If non-derived ptr, get directly designated type.
911 -- If the type has a full view, all references are on the
912 -- partial view, that is seen first.
914 elsif Is_Access_Type (Tref) then
915 Tref := Directly_Designated_Type (Tref);
919 elsif Is_Private_Type (Tref)
920 and then Present (Full_View (Tref))
922 if Is_Access_Type (Full_View (Tref)) then
923 Tref := Directly_Designated_Type (Full_View (Tref));
927 -- If the full view is an array type, we also retrieve
928 -- the corresponding component type, because the ali
929 -- entry already indicates that this is an array.
931 elsif Is_Array_Type (Full_View (Tref)) then
932 Tref := Component_Type (Full_View (Tref));
937 -- If non-derived array, get component type. Skip component
938 -- type for case of String or Wide_String, saves worthwhile
941 elsif Is_Array_Type (Tref)
942 and then Tref /= Standard_String
943 and then Tref /= Standard_Wide_String
945 Tref := Component_Type (Tref);
949 -- For other non-derived base types, nothing
955 -- For a subtype, go to ancestor subtype
958 Tref := Ancestor_Subtype (Tref);
960 -- If no ancestor subtype, go to base type
963 Tref := Base_Type (Sav);
967 -- For objects, functions, enum literals, just get type from
970 elsif Is_Object (Tref)
971 or else Ekind (Tref) = E_Enumeration_Literal
972 or else Ekind (Tref) = E_Function
973 or else Ekind (Tref) = E_Operator
975 Tref := Etype (Tref);
977 -- For anything else, exit
983 -- Exit if no type reference, or we are stuck in some loop trying
984 -- to find the type reference, or if the type is standard void
985 -- type (the latter is an implementation artifact that should not
986 -- show up in the generated cross-references).
990 or else Tref = Standard_Void_Type;
992 -- If we have a usable type reference, return, otherwise keep
993 -- looking for something useful (we are looking for something
994 -- that either comes from source or standard)
996 if Sloc (Tref) = Standard_Location
997 or else Comes_From_Source (Tref)
999 -- If the reference is a subtype created for a generic actual,
1000 -- go actual directly, the inner subtype is not user visible.
1002 if Nkind (Parent (Tref)) = N_Subtype_Declaration
1003 and then not Comes_From_Source (Parent (Tref))
1005 (Is_Wrapper_Package (Scope (Tref))
1006 or else Is_Generic_Instance (Scope (Tref)))
1008 Tref := First_Subtype (Base_Type (Tref));
1015 -- If we fall through the loop, no type reference
1020 end Get_Type_Reference;
1022 -------------------------------
1023 -- Output_Import_Export_Info --
1024 -------------------------------
1026 procedure Output_Import_Export_Info (Ent : Entity_Id) is
1027 Language_Name : Name_Id;
1028 Conv : constant Convention_Id := Convention (Ent);
1031 -- Generate language name from convention
1033 if Conv = Convention_C then
1034 Language_Name := Name_C;
1036 elsif Conv = Convention_CPP then
1037 Language_Name := Name_CPP;
1039 elsif Conv = Convention_Ada then
1040 Language_Name := Name_Ada;
1043 -- For the moment we ignore all other cases ???
1048 Write_Info_Char ('<');
1049 Get_Unqualified_Name_String (Language_Name);
1051 for J in 1 .. Name_Len loop
1052 Write_Info_Char (Name_Buffer (J));
1055 if Present (Interface_Name (Ent)) then
1056 Write_Info_Char (',');
1057 String_To_Name_Buffer (Strval (Interface_Name (Ent)));
1059 for J in 1 .. Name_Len loop
1060 Write_Info_Char (Name_Buffer (J));
1064 Write_Info_Char ('>');
1065 end Output_Import_Export_Info;
1067 -- Start of processing for Output_References
1070 if not Opt.Xref_Active then
1074 -- Before we go ahead and output the references we have a problem
1075 -- that needs dealing with. So far we have captured things that are
1076 -- definitely referenced by the main unit, or defined in the main
1077 -- unit. That's because we don't want to clutter up the ali file
1078 -- for this unit with definition lines for entities in other units
1079 -- that are not referenced.
1081 -- But there is a glitch. We may reference an entity in another unit,
1082 -- and it may have a type reference to an entity that is not directly
1083 -- referenced in the main unit, which may mean that there is no xref
1084 -- entry for this entity yet in the list of references.
1086 -- If we don't do something about this, we will end with an orphan type
1087 -- reference, i.e. it will point to an entity that does not appear
1088 -- within the generated references in the ali file. That is not good for
1089 -- tools using the xref information.
1091 -- To fix this, we go through the references adding definition entries
1092 -- for any unreferenced entities that can be referenced in a type
1093 -- reference. There is a recursion problem here, and that is dealt with
1094 -- by making sure that this traversal also traverses any entries that
1095 -- get added by the traversal.
1097 Handle_Orphan_Type_References : declare
1105 pragma Warnings (Off, L);
1106 pragma Warnings (Off, R);
1108 procedure New_Entry (E : Entity_Id);
1109 -- Make an additional entry into the Xref table for a type entity
1110 -- that is related to the current entity (parent, type ancestor,
1111 -- progenitor, etc.).
1117 procedure New_Entry (E : Entity_Id) is
1120 and then not Has_Xref_Entry (E)
1121 and then Sloc (E) > No_Location
1123 Xrefs.Increment_Last;
1125 Loc := Original_Location (Sloc (E));
1126 Xrefs.Table (Indx).Ent := E;
1127 Xrefs.Table (Indx).Loc := No_Location;
1128 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
1129 Xrefs.Table (Indx).Lun := No_Unit;
1130 Set_Has_Xref_Entry (E);
1134 -- Start of processing for Handle_Orphan_Type_References
1137 -- Note that this is not a for loop for a very good reason. The
1138 -- processing of items in the table can add new items to the table,
1139 -- and they must be processed as well.
1142 while J <= Xrefs.Last loop
1143 Ent := Xrefs.Table (J).Ent;
1144 Get_Type_Reference (Ent, Tref, L, R);
1147 and then not Has_Xref_Entry (Tref)
1148 and then Sloc (Tref) > No_Location
1152 if Is_Record_Type (Ent)
1153 and then Present (Interfaces (Ent))
1155 -- Add an entry for each one of the given interfaces
1156 -- implemented by type Ent.
1159 Elmt : Elmt_Id := First_Elmt (Interfaces (Ent));
1161 while Present (Elmt) loop
1162 New_Entry (Node (Elmt));
1169 -- Collect inherited primitive operations that may be declared in
1170 -- another unit and have no visible reference in the current one.
1173 and then Is_Tagged_Type (Ent)
1174 and then Is_Derived_Type (Ent)
1175 and then Ent = Base_Type (Ent)
1176 and then In_Extended_Main_Source_Unit (Ent)
1179 Op_List : constant Elist_Id := Primitive_Operations (Ent);
1183 function Parent_Op (E : Entity_Id) return Entity_Id;
1184 -- Find original operation, which may be inherited through
1185 -- several derivations.
1187 function Parent_Op (E : Entity_Id) return Entity_Id is
1188 Orig_Op : constant Entity_Id := Alias (E);
1190 if No (Orig_Op) then
1192 elsif not Comes_From_Source (E)
1193 and then not Has_Xref_Entry (Orig_Op)
1194 and then Comes_From_Source (Orig_Op)
1198 return Parent_Op (Orig_Op);
1203 Op := First_Elmt (Op_List);
1204 while Present (Op) loop
1205 Prim := Parent_Op (Node (Op));
1207 if Present (Prim) then
1208 Xrefs.Increment_Last;
1210 Loc := Original_Location (Sloc (Prim));
1211 Xrefs.Table (Indx).Ent := Prim;
1212 Xrefs.Table (Indx).Loc := No_Location;
1213 Xrefs.Table (Indx).Eun :=
1214 Get_Source_Unit (Sloc (Prim));
1215 Xrefs.Table (Indx).Lun := No_Unit;
1216 Set_Has_Xref_Entry (Prim);
1226 end Handle_Orphan_Type_References;
1228 -- Now we have all the references, including those for any embedded
1229 -- type references, so we can sort them, and output them.
1231 Output_Refs : declare
1233 Nrefs : Nat := Xrefs.Last;
1234 -- Number of references in table. This value may get reset (reduced)
1235 -- when we eliminate duplicate reference entries.
1237 Rnums : array (0 .. Nrefs) of Nat;
1238 -- This array contains numbers of references in the Xrefs table.
1239 -- This list is sorted in output order. The extra 0'th entry is
1240 -- convenient for the call to sort. When we sort the table, we
1241 -- move the entries in Rnums around, but we do not move the
1242 -- original table entries.
1244 Curxu : Unit_Number_Type;
1245 -- Current xref unit
1247 Curru : Unit_Number_Type;
1248 -- Current reference unit for one entity
1250 Cursrc : Source_Buffer_Ptr;
1251 -- Current xref unit source text
1256 Curnam : String (1 .. Name_Buffer'Length);
1258 -- Simple name and length of current entity
1260 Curdef : Source_Ptr;
1261 -- Original source location for current entity
1264 -- Current reference location
1267 -- Entity type character
1273 -- Renaming reference
1275 Trunit : Unit_Number_Type;
1276 -- Unit number for type reference
1278 function Lt (Op1, Op2 : Natural) return Boolean;
1279 -- Comparison function for Sort call
1281 function Name_Change (X : Entity_Id) return Boolean;
1282 -- Determines if entity X has a different simple name from Curent
1284 procedure Move (From : Natural; To : Natural);
1285 -- Move procedure for Sort call
1287 package Sorting is new GNAT.Heap_Sort_G (Move, Lt);
1293 function Lt (Op1, Op2 : Natural) return Boolean is
1294 T1 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op1)));
1295 T2 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op2)));
1298 -- First test: if entity is in different unit, sort by unit
1300 if T1.Eun /= T2.Eun then
1301 return Dependency_Num (T1.Eun) < Dependency_Num (T2.Eun);
1303 -- Second test: within same unit, sort by entity Sloc
1305 elsif T1.Def /= T2.Def then
1306 return T1.Def < T2.Def;
1308 -- Third test: sort definitions ahead of references
1310 elsif T1.Loc = No_Location then
1313 elsif T2.Loc = No_Location then
1316 -- Fourth test: for same entity, sort by reference location unit
1318 elsif T1.Lun /= T2.Lun then
1319 return Dependency_Num (T1.Lun) < Dependency_Num (T2.Lun);
1321 -- Fifth test: order of location within referencing unit
1323 elsif T1.Loc /= T2.Loc then
1324 return T1.Loc < T2.Loc;
1326 -- Finally, for two locations at the same address, we prefer
1327 -- the one that does NOT have the type 'r' so that a modification
1328 -- or extension takes preference, when there are more than one
1329 -- reference at the same location.
1332 return T2.Typ = 'r';
1340 procedure Move (From : Natural; To : Natural) is
1342 Rnums (Nat (To)) := Rnums (Nat (From));
1349 -- Why a string comparison here??? Why not compare Name_Id values???
1351 function Name_Change (X : Entity_Id) return Boolean is
1353 Get_Unqualified_Name_String (Chars (X));
1355 if Name_Len /= Curlen then
1359 return Name_Buffer (1 .. Curlen) /= Curnam (1 .. Curlen);
1363 -- Start of processing for Output_Refs
1366 -- Capture the definition Sloc values. We delay doing this till now,
1367 -- since at the time the reference or definition is made, private
1368 -- types may be swapped, and the Sloc value may be incorrect. We
1369 -- also set up the pointer vector for the sort.
1371 for J in 1 .. Nrefs loop
1373 Xrefs.Table (J).Def :=
1374 Original_Location (Sloc (Xrefs.Table (J).Ent));
1377 -- Sort the references
1379 Sorting.Sort (Integer (Nrefs));
1381 -- Eliminate duplicate entries
1384 NR : constant Nat := Nrefs;
1387 -- We need this test for NR because if we force ALI file
1388 -- generation in case of errors detected, it may be the case
1389 -- that Nrefs is 0, so we should not reset it here
1394 for J in 2 .. NR loop
1395 if Xrefs.Table (Rnums (J)) /=
1396 Xrefs.Table (Rnums (Nrefs))
1399 Rnums (Nrefs) := Rnums (J);
1405 -- Initialize loop through references
1409 Curdef := No_Location;
1411 Crloc := No_Location;
1413 -- Loop to output references
1415 for Refno in 1 .. Nrefs loop
1416 Output_One_Ref : declare
1422 pragma Warnings (Off, WC);
1423 pragma Warnings (Off, Err);
1425 XE : Xref_Entry renames Xrefs.Table (Rnums (Refno));
1426 -- The current entry to be accessed
1429 -- Used to index into source buffer to get entity name
1433 -- Used for {} or <> or () for type reference
1435 procedure Check_Type_Reference
1437 List_Interface : Boolean);
1438 -- Find whether there is a meaningful type reference for
1439 -- Ent, and display it accordingly. If List_Interface is
1440 -- true, then Ent is a progenitor interface of the current
1441 -- type entity being listed. In that case list it as is,
1442 -- without looking for a type reference for it.
1444 procedure Output_Instantiation_Refs (Loc : Source_Ptr);
1445 -- Recursive procedure to output instantiation references for
1446 -- the given source ptr in [file|line[...]] form. No output
1447 -- if the given location is not a generic template reference.
1449 procedure Output_Overridden_Op (Old_E : Entity_Id);
1450 -- For a subprogram that is overriding, display information
1451 -- about the inherited operation that it overrides.
1453 --------------------------
1454 -- Check_Type_Reference --
1455 --------------------------
1457 procedure Check_Type_Reference
1459 List_Interface : Boolean)
1462 if List_Interface then
1464 -- This is a progenitor interface of the type for which
1465 -- xref information is being generated.
1472 Get_Type_Reference (Ent, Tref, Left, Right);
1475 if Present (Tref) then
1477 -- Case of standard entity, output name
1479 if Sloc (Tref) = Standard_Location then
1480 Write_Info_Char (Left);
1481 Write_Info_Name (Chars (Tref));
1482 Write_Info_Char (Right);
1484 -- Case of source entity, output location
1487 Write_Info_Char (Left);
1488 Trunit := Get_Source_Unit (Sloc (Tref));
1490 if Trunit /= Curxu then
1491 Write_Info_Nat (Dependency_Num (Trunit));
1492 Write_Info_Char ('|');
1496 (Int (Get_Logical_Line_Number (Sloc (Tref))));
1504 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1507 and then Present (Full_View (Ent))
1509 Ent := Underlying_Type (Ent);
1511 if Present (Ent) then
1512 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1516 Write_Info_Char (Ctyp);
1520 (Int (Get_Column_Number (Sloc (Tref))));
1522 -- If the type comes from an instantiation, add the
1523 -- corresponding info.
1525 Output_Instantiation_Refs (Sloc (Tref));
1526 Write_Info_Char (Right);
1529 end Check_Type_Reference;
1531 -------------------------------
1532 -- Output_Instantiation_Refs --
1533 -------------------------------
1535 procedure Output_Instantiation_Refs (Loc : Source_Ptr) is
1536 Iloc : constant Source_Ptr := Instantiation_Location (Loc);
1537 Lun : Unit_Number_Type;
1538 Cu : constant Unit_Number_Type := Curru;
1541 -- Nothing to do if this is not an instantiation
1543 if Iloc = No_Location then
1547 -- Output instantiation reference
1549 Write_Info_Char ('[');
1550 Lun := Get_Source_Unit (Iloc);
1552 if Lun /= Curru then
1554 Write_Info_Nat (Dependency_Num (Curru));
1555 Write_Info_Char ('|');
1558 Write_Info_Nat (Int (Get_Logical_Line_Number (Iloc)));
1560 -- Recursive call to get nested instantiations
1562 Output_Instantiation_Refs (Iloc);
1564 -- Output final ] after call to get proper nesting
1566 Write_Info_Char (']');
1569 end Output_Instantiation_Refs;
1571 --------------------------
1572 -- Output_Overridden_Op --
1573 --------------------------
1575 procedure Output_Overridden_Op (Old_E : Entity_Id) is
1579 -- The overridden operation has an implicit declaration
1580 -- at the point of derivation. What we want to display
1581 -- is the original operation, which has the actual body
1582 -- (or abstract declaration) that is being overridden.
1583 -- The overridden operation is not always set, e.g. when
1584 -- it is a predefined operator.
1589 elsif Present (Alias (Old_E)) then
1590 Op := Alias (Old_E);
1597 and then Sloc (Op) /= Standard_Location
1600 Loc : constant Source_Ptr := Sloc (Op);
1601 Par_Unit : constant Unit_Number_Type :=
1602 Get_Source_Unit (Loc);
1605 Write_Info_Char ('<');
1607 if Par_Unit /= Curxu then
1608 Write_Info_Nat (Dependency_Num (Par_Unit));
1609 Write_Info_Char ('|');
1612 Write_Info_Nat (Int (Get_Logical_Line_Number (Loc)));
1613 Write_Info_Char ('p');
1614 Write_Info_Nat (Int (Get_Column_Number (Loc)));
1615 Write_Info_Char ('>');
1618 end Output_Overridden_Op;
1620 -- Start of processing for Output_One_Ref
1624 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1626 -- Skip reference if it is the only reference to an entity,
1627 -- and it is an END line reference, and the entity is not in
1628 -- the current extended source. This prevents junk entries
1629 -- consisting only of packages with END lines, where no
1630 -- entity from the package is actually referenced.
1633 and then Ent /= Curent
1634 and then (Refno = Nrefs or else
1635 Ent /= Xrefs.Table (Rnums (Refno + 1)).Ent)
1637 not In_Extended_Main_Source_Unit (Ent)
1642 -- For private type, get full view type
1645 and then Present (Full_View (XE.Ent))
1647 Ent := Underlying_Type (Ent);
1649 if Present (Ent) then
1650 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1654 -- Special exception for Boolean
1656 if Ctyp = 'E' and then Is_Boolean_Type (Ent) then
1660 -- For variable reference, get corresponding type
1663 Ent := Etype (XE.Ent);
1664 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1666 -- If variable is private type, get full view type
1669 and then Present (Full_View (Etype (XE.Ent)))
1671 Ent := Underlying_Type (Etype (XE.Ent));
1673 if Present (Ent) then
1674 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1677 elsif Is_Generic_Type (Ent) then
1679 -- If the type of the entity is a generic private type,
1680 -- there is no usable full view, so retain the indication
1681 -- that this is an object.
1686 -- Special handling for access parameter
1689 K : constant Entity_Kind := Ekind (Etype (XE.Ent));
1692 if (K = E_Anonymous_Access_Type
1694 K = E_Anonymous_Access_Subprogram_Type
1696 E_Anonymous_Access_Protected_Subprogram_Type)
1697 and then Is_Formal (XE.Ent)
1701 -- Special handling for Boolean
1703 elsif Ctyp = 'e' and then Is_Boolean_Type (Ent) then
1709 -- Special handling for abstract types and operations
1711 if Is_Overloadable (XE.Ent)
1712 and then Is_Abstract_Subprogram (XE.Ent)
1715 Ctyp := 'x'; -- Abstract procedure
1717 elsif Ctyp = 'V' then
1718 Ctyp := 'y'; -- Abstract function
1721 elsif Is_Type (XE.Ent)
1722 and then Is_Abstract_Type (XE.Ent)
1724 if Is_Interface (XE.Ent) then
1727 elsif Ctyp = 'R' then
1728 Ctyp := 'H'; -- Abstract type
1732 -- Only output reference if interesting type of entity, and
1733 -- suppress self references, except for bodies that act as
1734 -- specs. Also suppress definitions of body formals (we only
1735 -- treat these as references, and the references were
1736 -- separately recorded).
1739 or else (XE.Loc = XE.Def
1742 or else not Is_Subprogram (XE.Ent)))
1743 or else (Is_Formal (XE.Ent)
1744 and then Present (Spec_Entity (XE.Ent)))
1749 -- Start new Xref section if new xref unit
1751 if XE.Eun /= Curxu then
1752 if Write_Info_Col > 1 then
1757 Cursrc := Source_Text (Source_Index (Curxu));
1759 Write_Info_Initiate ('X');
1760 Write_Info_Char (' ');
1761 Write_Info_Nat (Dependency_Num (XE.Eun));
1762 Write_Info_Char (' ');
1763 Write_Info_Name (Reference_Name (Source_Index (XE.Eun)));
1766 -- Start new Entity line if new entity. Note that we
1767 -- consider two entities the same if they have the same
1768 -- name and source location. This causes entities in
1769 -- instantiations to be treated as though they referred
1776 (Name_Change (XE.Ent) or else XE.Def /= Curdef))
1781 Get_Unqualified_Name_String (Chars (XE.Ent));
1783 Curnam (1 .. Curlen) := Name_Buffer (1 .. Curlen);
1785 if Write_Info_Col > 1 then
1789 -- Write column number information
1791 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Def)));
1792 Write_Info_Char (Ctyp);
1793 Write_Info_Nat (Int (Get_Column_Number (XE.Def)));
1795 -- Write level information
1797 Write_Level_Info : declare
1798 function Is_Visible_Generic_Entity
1799 (E : Entity_Id) return Boolean;
1800 -- Check whether E is declared in the visible part
1801 -- of a generic package. For source navigation
1802 -- purposes, treat this as a visible entity.
1804 function Is_Private_Record_Component
1805 (E : Entity_Id) return Boolean;
1806 -- Check whether E is a non-inherited component of a
1807 -- private extension. Even if the enclosing record is
1808 -- public, we want to treat the component as private
1809 -- for navigation purposes.
1811 ---------------------------------
1812 -- Is_Private_Record_Component --
1813 ---------------------------------
1815 function Is_Private_Record_Component
1816 (E : Entity_Id) return Boolean
1818 S : constant Entity_Id := Scope (E);
1821 Ekind (E) = E_Component
1822 and then Nkind (Declaration_Node (S)) =
1823 N_Private_Extension_Declaration
1824 and then Original_Record_Component (E) = E;
1825 end Is_Private_Record_Component;
1827 -------------------------------
1828 -- Is_Visible_Generic_Entity --
1829 -------------------------------
1831 function Is_Visible_Generic_Entity
1832 (E : Entity_Id) return Boolean
1837 -- The Present check here is an error defense
1839 if Present (Scope (E))
1840 and then Ekind (Scope (E)) /= E_Generic_Package
1846 while Present (Par) loop
1848 Nkind (Par) = N_Generic_Package_Declaration
1850 -- Entity is a generic formal
1855 Nkind (Parent (Par)) = N_Package_Specification
1858 Is_List_Member (Par)
1859 and then List_Containing (Par) =
1860 Visible_Declarations (Parent (Par));
1862 Par := Parent (Par);
1867 end Is_Visible_Generic_Entity;
1869 -- Start of processing for Write_Level_Info
1872 if Is_Hidden (Curent)
1873 or else Is_Private_Record_Component (Curent)
1875 Write_Info_Char (' ');
1879 or else Is_Visible_Generic_Entity (Curent)
1881 Write_Info_Char ('*');
1884 Write_Info_Char (' ');
1886 end Write_Level_Info;
1888 -- Output entity name. We use the occurrence from the
1889 -- actual source program at the definition point.
1891 P := Original_Location (Sloc (XE.Ent));
1893 -- Entity is character literal
1895 if Cursrc (P) = ''' then
1896 Write_Info_Char (Cursrc (P));
1897 Write_Info_Char (Cursrc (P + 1));
1898 Write_Info_Char (Cursrc (P + 2));
1900 -- Entity is operator symbol
1902 elsif Cursrc (P) = '"' or else Cursrc (P) = '%' then
1903 Write_Info_Char (Cursrc (P));
1908 Write_Info_Char (Cursrc (P2));
1909 exit when Cursrc (P2) = Cursrc (P);
1912 -- Entity is identifier
1916 if Is_Start_Of_Wide_Char (Cursrc, P) then
1917 Scan_Wide (Cursrc, P, WC, Err);
1918 elsif not Identifier_Char (Cursrc (P)) then
1925 -- Write out the identifier by copying the exact
1926 -- source characters used in its declaration. Note
1927 -- that this means wide characters will be in their
1928 -- original encoded form.
1931 Original_Location (Sloc (XE.Ent)) .. P - 1
1933 Write_Info_Char (Cursrc (J));
1937 -- See if we have a renaming reference
1939 if Is_Object (XE.Ent)
1940 and then Present (Renamed_Object (XE.Ent))
1942 Rref := Renamed_Object (XE.Ent);
1944 elsif Is_Overloadable (XE.Ent)
1945 and then Nkind (Parent (Declaration_Node (XE.Ent))) =
1946 N_Subprogram_Renaming_Declaration
1948 Rref := Name (Parent (Declaration_Node (XE.Ent)));
1950 elsif Ekind (XE.Ent) = E_Package
1951 and then Nkind (Declaration_Node (XE.Ent)) =
1952 N_Package_Renaming_Declaration
1954 Rref := Name (Declaration_Node (XE.Ent));
1960 if Present (Rref) then
1961 if Nkind (Rref) = N_Expanded_Name then
1962 Rref := Selector_Name (Rref);
1965 if Nkind (Rref) = N_Identifier
1966 or else Nkind (Rref) = N_Operator_Symbol
1970 -- For renamed array components, use the array name
1971 -- for the renamed entity, which reflect the fact that
1972 -- in general the whole array is aliased.
1974 elsif Nkind (Rref) = N_Indexed_Component then
1975 if Nkind (Prefix (Rref)) = N_Identifier then
1976 Rref := Prefix (Rref);
1977 elsif Nkind (Prefix (Rref)) = N_Expanded_Name then
1978 Rref := Selector_Name (Prefix (Rref));
1988 -- Write out renaming reference if we have one
1990 if Present (Rref) then
1991 Write_Info_Char ('=');
1993 (Int (Get_Logical_Line_Number (Sloc (Rref))));
1994 Write_Info_Char (':');
1996 (Int (Get_Column_Number (Sloc (Rref))));
1999 -- Indicate that the entity is in the unit of the current
2004 -- Write out information about generic parent, if entity
2007 if Is_Generic_Instance (XE.Ent) then
2009 Gen_Par : constant Entity_Id :=
2012 (Unit_Declaration_Node (XE.Ent)));
2013 Loc : constant Source_Ptr := Sloc (Gen_Par);
2014 Gen_U : constant Unit_Number_Type :=
2015 Get_Source_Unit (Loc);
2018 Write_Info_Char ('[');
2019 if Curru /= Gen_U then
2020 Write_Info_Nat (Dependency_Num (Gen_U));
2021 Write_Info_Char ('|');
2025 (Int (Get_Logical_Line_Number (Loc)));
2026 Write_Info_Char (']');
2030 -- See if we have a type reference and if so output
2032 Check_Type_Reference (XE.Ent, False);
2034 -- Additional information for types with progenitors
2036 if Is_Record_Type (XE.Ent)
2037 and then Present (Interfaces (XE.Ent))
2040 Elmt : Elmt_Id := First_Elmt (Interfaces (XE.Ent));
2042 while Present (Elmt) loop
2043 Check_Type_Reference (Node (Elmt), True);
2048 -- For array types, list index types as well.
2049 -- (This is not C, indices have distinct types).
2051 elsif Is_Array_Type (XE.Ent) then
2055 Indx := First_Index (XE.Ent);
2056 while Present (Indx) loop
2057 Check_Type_Reference
2058 (First_Subtype (Etype (Indx)), True);
2064 -- If the entity is an overriding operation, write info
2065 -- on operation that was overridden.
2067 if Is_Subprogram (XE.Ent)
2068 and then Is_Overriding_Operation (XE.Ent)
2070 Output_Overridden_Op (Overridden_Operation (XE.Ent));
2073 -- End of processing for entity output
2075 Crloc := No_Location;
2078 -- Output the reference
2080 if XE.Loc /= No_Location
2081 and then XE.Loc /= Crloc
2085 -- Start continuation if line full, else blank
2087 if Write_Info_Col > 72 then
2089 Write_Info_Initiate ('.');
2092 Write_Info_Char (' ');
2094 -- Output file number if changed
2096 if XE.Lun /= Curru then
2098 Write_Info_Nat (Dependency_Num (Curru));
2099 Write_Info_Char ('|');
2102 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Loc)));
2103 Write_Info_Char (XE.Typ);
2105 if Is_Overloadable (XE.Ent)
2106 and then Is_Imported (XE.Ent)
2107 and then XE.Typ = 'b'
2109 Output_Import_Export_Info (XE.Ent);
2112 Write_Info_Nat (Int (Get_Column_Number (XE.Loc)));
2114 Output_Instantiation_Refs (Sloc (XE.Ent));
2125 end Output_References;