1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1998-2007, 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
242 -- ??? There are several routines here and there that perform a similar
243 -- (but subtly different) computation, which should be factored:
245 -- Sem_Util.May_Be_Lvalue
246 -- Sem_Util.Known_To_Be_Assigned
247 -- Exp_Ch2.Expand_Entry_Parameter.In_Assignment_Context
248 -- Exp_Smem.Is_Out_Actual
250 function Is_On_LHS (Node : Node_Id) return Boolean is
256 -- Only identifiers are considered, is this necessary???
258 if Nkind (Node) /= N_Identifier then
262 -- Immediate return if appeared as OUT parameter
264 if Kind = E_Out_Parameter then
268 -- Search for assignment statement subtree root
275 if K = N_Assignment_Statement then
278 -- Check whether the parent is a component and the current node is
279 -- its prefix, but return False if the current node has an access
280 -- type, as in that case the selected or indexed component is an
281 -- implicit dereference, and the LHS is the designated object, not
282 -- the access object.
284 -- ??? case of a slice assignment?
286 -- ??? Note that in some cases this is called too early
287 -- (see comments in Sem_Ch8.Find_Direct_Name), at a point where
288 -- the tree is not fully typed yet. In that case we may lack
289 -- an Etype for N, and we must disable the check for an implicit
290 -- dereference. If the dereference is on an LHS, this causes a
293 elsif (K = N_Selected_Component or else K = N_Indexed_Component)
294 and then Prefix (P) = N
295 and then not (Present (Etype (N))
297 Is_Access_Type (Etype (N)))
301 -- All other cases, definitely not on left side
308 -- Parent (N) is assignment statement, check whether N is its name
310 return Name (Parent (N)) = N;
313 -- Start of processing for Generate_Reference
316 pragma Assert (Nkind (E) in N_Entity);
317 Find_Actual (N, Formal, Call);
319 if Present (Formal) then
320 Kind := Ekind (Formal);
325 -- Check for obsolescent reference to package ASCII. GNAT treats this
326 -- element of annex J specially since in practice, programs make a lot
327 -- of use of this feature, so we don't include it in the set of features
328 -- diagnosed when Warn_On_Obsolescent_Features mode is set. However we
329 -- are required to note it as a violation of the RM defined restriction.
331 if E = Standard_ASCII then
332 Check_Restriction (No_Obsolescent_Features, N);
335 -- Check for reference to entity marked with Is_Obsolescent
337 -- Note that we always allow obsolescent references in the compiler
338 -- itself and the run time, since we assume that we know what we are
339 -- doing in such cases. For example the calls in Ada.Characters.Handling
340 -- to its own obsolescent subprograms are just fine.
342 -- In any case we do not generate warnings within the extended source
343 -- unit of the entity in question, since we assume the source unit
344 -- itself knows what is going on (and for sure we do not want silly
345 -- warnings, e.g. on the end line of an obsolescent procedure body).
347 if Is_Obsolescent (E)
348 and then not GNAT_Mode
349 and then not In_Extended_Main_Source_Unit (E)
351 Check_Restriction (No_Obsolescent_Features, N);
353 if Warn_On_Obsolescent_Feature then
354 Output_Obsolescent_Entity_Warnings (N, E);
358 -- Warn if reference to Ada 2005 entity not in Ada 2005 mode. We only
359 -- detect real explicit references (modifications and references).
361 if Comes_From_Source (N)
362 and then Is_Ada_2005_Only (E)
363 and then Ada_Version < Ada_05
364 and then Warn_On_Ada_2005_Compatibility
365 and then (Typ = 'm' or else Typ = 'r')
367 Error_Msg_NE ("& is only defined in Ada 2005?", N, E);
370 -- Never collect references if not in main source unit. However, we omit
371 -- this test if Typ is 'e' or 'k', since these entries are structural,
372 -- and it is useful to have them in units that reference packages as
373 -- well as units that define packages. We also omit the test for the
374 -- case of 'p' since we want to include inherited primitive operations
375 -- from other packages.
377 -- We also omit this test is this is a body reference for a subprogram
378 -- instantiation. In this case the reference is to the generic body,
379 -- which clearly need not be in the main unit containing the instance.
380 -- For the same reason we accept an implicit reference generated for
381 -- a default in an instance.
383 if not In_Extended_Main_Source_Unit (N) then
388 or else (Typ = 'b' and then Is_Generic_Instance (E))
396 -- For reference type p, the entity must be in main source unit
398 if Typ = 'p' and then not In_Extended_Main_Source_Unit (E) then
402 -- Unless the reference is forced, we ignore references where the
403 -- reference itself does not come from source.
405 if not Force and then not Comes_From_Source (N) then
409 -- Deal with setting entity as referenced, unless suppressed. Note that
410 -- we still do Set_Referenced on entities that do not come from source.
411 -- This situation arises when we have a source reference to a derived
412 -- operation, where the derived operation itself does not come from
413 -- source, but we still want to mark it as referenced, since we really
414 -- are referencing an entity in the corresponding package (this avoids
415 -- wrong complaints that the package contains no referenced entities).
419 -- Assignable object appearing on left side of assignment or as
423 and then Is_On_LHS (N)
424 and then Ekind (E) /= E_In_Out_Parameter
426 -- For objects that are renamings, just set as simply referenced
427 -- we do not try to do assignment type tracking in this case.
429 if Present (Renamed_Object (E)) then
432 -- Out parameter case
434 elsif Kind = E_Out_Parameter then
436 -- If warning mode for all out parameters is set, or this is
437 -- the only warning parameter, then we want to mark this for
438 -- later warning logic by setting Referenced_As_Out_Parameter
440 if Warn_On_Modified_As_Out_Parameter (Formal) then
441 Set_Referenced_As_Out_Parameter (E, True);
442 Set_Referenced_As_LHS (E, False);
444 -- For OUT parameter not covered by the above cases, we simply
445 -- regard it as a normal reference (in this case we do not
446 -- want any of the warning machinery for out parameters).
452 -- For the left hand of an assignment case, we do nothing here.
453 -- The processing for Analyze_Assignment_Statement will set the
454 -- Referenced_As_LHS flag.
460 -- Check for a reference in a pragma that should not count as a
461 -- making the variable referenced for warning purposes.
463 elsif Is_Non_Significant_Pragma_Reference (N) then
466 -- A reference in an attribute definition clause does not count as a
467 -- reference except for the case of Address. The reason that 'Address
468 -- is an exception is that it creates an alias through which the
469 -- variable may be referenced.
471 elsif Nkind (Parent (N)) = N_Attribute_Definition_Clause
472 and then Chars (Parent (N)) /= Name_Address
473 and then N = Name (Parent (N))
477 -- Constant completion does not count as a reference
480 and then Ekind (E) = E_Constant
484 -- Record representation clause does not count as a reference
486 elsif Nkind (N) = N_Identifier
487 and then Nkind (Parent (N)) = N_Record_Representation_Clause
491 -- Discriminants do not need to produce a reference to record type
494 and then Nkind (Parent (N)) = N_Discriminant_Specification
501 -- Special processing for IN OUT parameters, where we have an
502 -- implicit assignment to a simple variable.
504 if Kind = E_In_Out_Parameter
505 and then Is_Assignable (E)
507 -- For sure this counts as a normal read reference
510 Set_Last_Assignment (E, Empty);
512 -- We count it as being referenced as an out parameter if the
513 -- option is set to warn on all out parameters, except that we
514 -- have a special exclusion for an intrinsic subprogram, which
515 -- is most likely an instantiation of Unchecked_Deallocation
516 -- which we do not want to consider as an assignment since it
517 -- generates false positives. We also exclude the case of an
518 -- IN OUT parameter if the name of the procedure is Free,
519 -- since we suspect similar semantics.
521 if Warn_On_All_Unread_Out_Parameters
522 and then Is_Entity_Name (Name (Call))
523 and then not Is_Intrinsic_Subprogram (Entity (Name (Call)))
524 and then Chars (Name (Call)) /= Name_Free
526 Set_Referenced_As_Out_Parameter (E, True);
527 Set_Referenced_As_LHS (E, False);
530 -- Any other occurrence counts as referencing the entity
535 -- If variable, this is an OK reference after an assignment
536 -- so we can clear the Last_Assignment indication.
538 if Is_Assignable (E) then
539 Set_Last_Assignment (E, Empty);
544 -- Check for pragma Unreferenced given and reference is within
545 -- this source unit (occasion for possible warning to be issued).
547 if Has_Pragma_Unreferenced (E)
548 and then In_Same_Extended_Unit (E, N)
550 -- A reference as a named parameter in a call does not count
551 -- as a violation of pragma Unreferenced for this purpose...
553 if Nkind (N) = N_Identifier
554 and then Nkind (Parent (N)) = N_Parameter_Association
555 and then Selector_Name (Parent (N)) = N
559 -- ... Neither does a reference to a variable on the left side
562 elsif Is_On_LHS (N) then
565 -- For entry formals, we want to place the warning message on the
566 -- corresponding entity in the accept statement. The current scope
567 -- is the body of the accept, so we find the formal whose name
568 -- matches that of the entry formal (there is no link between the
569 -- two entities, and the one in the accept statement is only used
570 -- for conformance checking).
572 elsif Ekind (Scope (E)) = E_Entry then
577 BE := First_Entity (Current_Scope);
578 while Present (BE) loop
579 if Chars (BE) = Chars (E) then
581 ("?pragma Unreferenced given for&!", N, BE);
589 -- Here we issue the warning, since this is a real reference
592 Error_Msg_NE ("?pragma Unreferenced given for&!", N, E);
596 -- If this is a subprogram instance, mark as well the internal
597 -- subprogram in the wrapper package, which may be a visible
600 if Is_Overloadable (E)
601 and then Is_Generic_Instance (E)
602 and then Present (Alias (E))
604 Set_Referenced (Alias (E));
608 -- Generate reference if all conditions are met:
611 -- Cross referencing must be active
615 -- The entity must be one for which we collect references
617 and then Xref_Entity_Letters (Ekind (E)) /= ' '
619 -- Both Sloc values must be set to something sensible
621 and then Sloc (E) > No_Location
622 and then Sloc (N) > No_Location
624 -- We ignore references from within an instance
626 and then Instantiation_Location (Sloc (N)) = No_Location
628 -- Ignore dummy references
632 if Nkind (N) = N_Identifier
634 Nkind (N) = N_Defining_Identifier
638 Nkind (N) = N_Defining_Operator_Symbol
640 Nkind (N) = N_Operator_Symbol
642 (Nkind (N) = N_Character_Literal
643 and then Sloc (Entity (N)) /= Standard_Location)
645 Nkind (N) = N_Defining_Character_Literal
649 elsif Nkind (N) = N_Expanded_Name
651 Nkind (N) = N_Selected_Component
653 Nod := Selector_Name (N);
659 -- Normal case of source entity comes from source
661 if Comes_From_Source (E) then
664 -- Entity does not come from source, but is a derived subprogram and
665 -- the derived subprogram comes from source (after one or more
666 -- derivations) in which case the reference is to parent subprogram.
668 elsif Is_Overloadable (E)
669 and then Present (Alias (E))
672 while not Comes_From_Source (Ent) loop
673 if No (Alias (Ent)) then
680 -- The internally created defining entity for a child subprogram
681 -- that has no previous spec has valid references.
683 elsif Is_Overloadable (E)
684 and then Is_Child_Unit (E)
688 -- Record components of discriminated subtypes or derived types must
689 -- be treated as references to the original component.
691 elsif Ekind (E) = E_Component
692 and then Comes_From_Source (Original_Record_Component (E))
694 Ent := Original_Record_Component (E);
696 -- If this is an expanded reference to a discriminant, recover the
697 -- original discriminant, which gets the reference.
699 elsif Ekind (E) = E_In_Parameter
700 and then Present (Discriminal_Link (E))
702 Ent := Discriminal_Link (E);
703 Set_Referenced (Ent);
705 -- Ignore reference to any other entity that is not from source
711 -- Record reference to entity
713 Ref := Original_Location (Sloc (Nod));
714 Def := Original_Location (Sloc (Ent));
716 Xrefs.Increment_Last;
719 Xrefs.Table (Indx).Loc := Ref;
721 -- Overriding operations are marked with 'P'
724 and then Is_Subprogram (N)
725 and then Is_Overriding_Operation (N)
727 Xrefs.Table (Indx).Typ := 'P';
729 Xrefs.Table (Indx).Typ := Typ;
732 Xrefs.Table (Indx).Eun := Get_Source_Unit (Def);
733 Xrefs.Table (Indx).Lun := Get_Source_Unit (Ref);
734 Xrefs.Table (Indx).Ent := Ent;
735 Set_Has_Xref_Entry (Ent);
737 end Generate_Reference;
739 -----------------------------------
740 -- Generate_Reference_To_Formals --
741 -----------------------------------
743 procedure Generate_Reference_To_Formals (E : Entity_Id) is
747 if Is_Generic_Subprogram (E) then
748 Formal := First_Entity (E);
750 while Present (Formal)
751 and then not Is_Formal (Formal)
753 Next_Entity (Formal);
757 Formal := First_Formal (E);
760 while Present (Formal) loop
761 if Ekind (Formal) = E_In_Parameter then
763 if Nkind (Parameter_Type (Parent (Formal)))
764 = N_Access_Definition
766 Generate_Reference (E, Formal, '^', False);
768 Generate_Reference (E, Formal, '>', False);
771 elsif Ekind (Formal) = E_In_Out_Parameter then
772 Generate_Reference (E, Formal, '=', False);
775 Generate_Reference (E, Formal, '<', False);
778 Next_Formal (Formal);
780 end Generate_Reference_To_Formals;
782 -------------------------------------------
783 -- Generate_Reference_To_Generic_Formals --
784 -------------------------------------------
786 procedure Generate_Reference_To_Generic_Formals (E : Entity_Id) is
790 Formal := First_Entity (E);
791 while Present (Formal) loop
792 if Comes_From_Source (Formal) then
793 Generate_Reference (E, Formal, 'z', False);
796 Next_Entity (Formal);
798 end Generate_Reference_To_Generic_Formals;
804 procedure Initialize is
809 -----------------------
810 -- Output_References --
811 -----------------------
813 procedure Output_References is
815 procedure Get_Type_Reference
817 Tref : out Entity_Id;
818 Left : out Character;
819 Right : out Character);
820 -- Given an Entity_Id Ent, determines whether a type reference is
821 -- required. If so, Tref is set to the entity for the type reference
822 -- and Left and Right are set to the left/right brackets to be output
823 -- for the reference. If no type reference is required, then Tref is
824 -- set to Empty, and Left/Right are set to space.
826 procedure Output_Import_Export_Info (Ent : Entity_Id);
827 -- Ouput language and external name information for an interfaced
828 -- entity, using the format <language, external_name>,
830 ------------------------
831 -- Get_Type_Reference --
832 ------------------------
834 procedure Get_Type_Reference
836 Tref : out Entity_Id;
837 Left : out Character;
838 Right : out Character)
843 -- See if we have a type reference
852 -- Processing for types
854 if Is_Type (Tref) then
858 if Base_Type (Tref) = Tref then
860 -- If derived, then get first subtype
862 if Tref /= Etype (Tref) then
863 Tref := First_Subtype (Etype (Tref));
865 -- Set brackets for derived type, but don't override
866 -- pointer case since the fact that something is a
867 -- pointer is more important.
874 -- If non-derived ptr, get directly designated type.
875 -- If the type has a full view, all references are on the
876 -- partial view, that is seen first.
878 elsif Is_Access_Type (Tref) then
879 Tref := Directly_Designated_Type (Tref);
883 elsif Is_Private_Type (Tref)
884 and then Present (Full_View (Tref))
886 if Is_Access_Type (Full_View (Tref)) then
887 Tref := Directly_Designated_Type (Full_View (Tref));
891 -- If the full view is an array type, we also retrieve
892 -- the corresponding component type, because the ali
893 -- entry already indicates that this is an array.
895 elsif Is_Array_Type (Full_View (Tref)) then
896 Tref := Component_Type (Full_View (Tref));
901 -- If non-derived array, get component type. Skip component
902 -- type for case of String or Wide_String, saves worthwhile
905 elsif Is_Array_Type (Tref)
906 and then Tref /= Standard_String
907 and then Tref /= Standard_Wide_String
909 Tref := Component_Type (Tref);
913 -- For other non-derived base types, nothing
919 -- For a subtype, go to ancestor subtype
922 Tref := Ancestor_Subtype (Tref);
924 -- If no ancestor subtype, go to base type
927 Tref := Base_Type (Sav);
931 -- For objects, functions, enum literals, just get type from
934 elsif Is_Object (Tref)
935 or else Ekind (Tref) = E_Enumeration_Literal
936 or else Ekind (Tref) = E_Function
937 or else Ekind (Tref) = E_Operator
939 Tref := Etype (Tref);
941 -- For anything else, exit
947 -- Exit if no type reference, or we are stuck in some loop trying
948 -- to find the type reference, or if the type is standard void
949 -- type (the latter is an implementation artifact that should not
950 -- show up in the generated cross-references).
954 or else Tref = Standard_Void_Type;
956 -- If we have a usable type reference, return, otherwise keep
957 -- looking for something useful (we are looking for something
958 -- that either comes from source or standard)
960 if Sloc (Tref) = Standard_Location
961 or else Comes_From_Source (Tref)
963 -- If the reference is a subtype created for a generic actual,
964 -- go actual directly, the inner subtype is not user visible.
966 if Nkind (Parent (Tref)) = N_Subtype_Declaration
967 and then not Comes_From_Source (Parent (Tref))
969 (Is_Wrapper_Package (Scope (Tref))
970 or else Is_Generic_Instance (Scope (Tref)))
972 Tref := First_Subtype (Base_Type (Tref));
979 -- If we fall through the loop, no type reference
984 end Get_Type_Reference;
986 -------------------------------
987 -- Output_Import_Export_Info --
988 -------------------------------
990 procedure Output_Import_Export_Info (Ent : Entity_Id) is
991 Language_Name : Name_Id;
992 Conv : constant Convention_Id := Convention (Ent);
995 -- Generate language name from convention
997 if Conv = Convention_C then
998 Language_Name := Name_C;
1000 elsif Conv = Convention_CPP then
1001 Language_Name := Name_CPP;
1003 elsif Conv = Convention_Ada then
1004 Language_Name := Name_Ada;
1007 -- For the moment we ignore all other cases ???
1012 Write_Info_Char ('<');
1013 Get_Unqualified_Name_String (Language_Name);
1015 for J in 1 .. Name_Len loop
1016 Write_Info_Char (Name_Buffer (J));
1019 if Present (Interface_Name (Ent)) then
1020 Write_Info_Char (',');
1021 String_To_Name_Buffer (Strval (Interface_Name (Ent)));
1023 for J in 1 .. Name_Len loop
1024 Write_Info_Char (Name_Buffer (J));
1028 Write_Info_Char ('>');
1029 end Output_Import_Export_Info;
1031 -- Start of processing for Output_References
1034 if not Opt.Xref_Active then
1038 -- Before we go ahead and output the references we have a problem
1039 -- that needs dealing with. So far we have captured things that are
1040 -- definitely referenced by the main unit, or defined in the main
1041 -- unit. That's because we don't want to clutter up the ali file
1042 -- for this unit with definition lines for entities in other units
1043 -- that are not referenced.
1045 -- But there is a glitch. We may reference an entity in another unit,
1046 -- and it may have a type reference to an entity that is not directly
1047 -- referenced in the main unit, which may mean that there is no xref
1048 -- entry for this entity yet in the list of references.
1050 -- If we don't do something about this, we will end with an orphan type
1051 -- reference, i.e. it will point to an entity that does not appear
1052 -- within the generated references in the ali file. That is not good for
1053 -- tools using the xref information.
1055 -- To fix this, we go through the references adding definition entries
1056 -- for any unreferenced entities that can be referenced in a type
1057 -- reference. There is a recursion problem here, and that is dealt with
1058 -- by making sure that this traversal also traverses any entries that
1059 -- get added by the traversal.
1061 Handle_Orphan_Type_References : declare
1069 pragma Warnings (Off, L);
1070 pragma Warnings (Off, R);
1072 procedure New_Entry (E : Entity_Id);
1073 -- Make an additional entry into the Xref table for a type entity
1074 -- that is related to the current entity (parent, type ancestor,
1075 -- progenitor, etc.).
1081 procedure New_Entry (E : Entity_Id) is
1084 and then not Has_Xref_Entry (E)
1085 and then Sloc (E) > No_Location
1087 Xrefs.Increment_Last;
1089 Loc := Original_Location (Sloc (E));
1090 Xrefs.Table (Indx).Ent := E;
1091 Xrefs.Table (Indx).Loc := No_Location;
1092 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
1093 Xrefs.Table (Indx).Lun := No_Unit;
1094 Set_Has_Xref_Entry (E);
1098 -- Start of processing for Handle_Orphan_Type_References
1101 -- Note that this is not a for loop for a very good reason. The
1102 -- processing of items in the table can add new items to the table,
1103 -- and they must be processed as well.
1106 while J <= Xrefs.Last loop
1107 Ent := Xrefs.Table (J).Ent;
1108 Get_Type_Reference (Ent, Tref, L, R);
1111 and then not Has_Xref_Entry (Tref)
1112 and then Sloc (Tref) > No_Location
1116 if Is_Record_Type (Ent)
1117 and then Present (Abstract_Interfaces (Ent))
1119 -- Add an entry for each one of the given interfaces
1120 -- implemented by type Ent.
1126 Elmt := First_Elmt (Abstract_Interfaces (Ent));
1127 while Present (Elmt) loop
1128 New_Entry (Node (Elmt));
1135 -- Collect inherited primitive operations that may be declared in
1136 -- another unit and have no visible reference in the current one.
1139 and then Is_Tagged_Type (Ent)
1140 and then Is_Derived_Type (Ent)
1141 and then Ent = Base_Type (Ent)
1142 and then In_Extended_Main_Source_Unit (Ent)
1145 Op_List : constant Elist_Id := Primitive_Operations (Ent);
1149 function Parent_Op (E : Entity_Id) return Entity_Id;
1150 -- Find original operation, which may be inherited through
1151 -- several derivations.
1153 function Parent_Op (E : Entity_Id) return Entity_Id is
1154 Orig_Op : constant Entity_Id := Alias (E);
1156 if No (Orig_Op) then
1158 elsif not Comes_From_Source (E)
1159 and then not Has_Xref_Entry (Orig_Op)
1160 and then Comes_From_Source (Orig_Op)
1164 return Parent_Op (Orig_Op);
1169 Op := First_Elmt (Op_List);
1170 while Present (Op) loop
1171 Prim := Parent_Op (Node (Op));
1173 if Present (Prim) then
1174 Xrefs.Increment_Last;
1176 Loc := Original_Location (Sloc (Prim));
1177 Xrefs.Table (Indx).Ent := Prim;
1178 Xrefs.Table (Indx).Loc := No_Location;
1179 Xrefs.Table (Indx).Eun :=
1180 Get_Source_Unit (Sloc (Prim));
1181 Xrefs.Table (Indx).Lun := No_Unit;
1182 Set_Has_Xref_Entry (Prim);
1192 end Handle_Orphan_Type_References;
1194 -- Now we have all the references, including those for any embedded
1195 -- type references, so we can sort them, and output them.
1197 Output_Refs : declare
1199 Nrefs : Nat := Xrefs.Last;
1200 -- Number of references in table. This value may get reset (reduced)
1201 -- when we eliminate duplicate reference entries.
1203 Rnums : array (0 .. Nrefs) of Nat;
1204 -- This array contains numbers of references in the Xrefs table.
1205 -- This list is sorted in output order. The extra 0'th entry is
1206 -- convenient for the call to sort. When we sort the table, we
1207 -- move the entries in Rnums around, but we do not move the
1208 -- original table entries.
1210 Curxu : Unit_Number_Type;
1211 -- Current xref unit
1213 Curru : Unit_Number_Type;
1214 -- Current reference unit for one entity
1216 Cursrc : Source_Buffer_Ptr;
1217 -- Current xref unit source text
1222 Curnam : String (1 .. Name_Buffer'Length);
1224 -- Simple name and length of current entity
1226 Curdef : Source_Ptr;
1227 -- Original source location for current entity
1230 -- Current reference location
1233 -- Entity type character
1239 -- Renaming reference
1241 Trunit : Unit_Number_Type;
1242 -- Unit number for type reference
1244 function Lt (Op1, Op2 : Natural) return Boolean;
1245 -- Comparison function for Sort call
1247 function Name_Change (X : Entity_Id) return Boolean;
1248 -- Determines if entity X has a different simple name from Curent
1250 procedure Move (From : Natural; To : Natural);
1251 -- Move procedure for Sort call
1253 package Sorting is new GNAT.Heap_Sort_G (Move, Lt);
1259 function Lt (Op1, Op2 : Natural) return Boolean is
1260 T1 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op1)));
1261 T2 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op2)));
1264 -- First test: if entity is in different unit, sort by unit
1266 if T1.Eun /= T2.Eun then
1267 return Dependency_Num (T1.Eun) < Dependency_Num (T2.Eun);
1269 -- Second test: within same unit, sort by entity Sloc
1271 elsif T1.Def /= T2.Def then
1272 return T1.Def < T2.Def;
1274 -- Third test: sort definitions ahead of references
1276 elsif T1.Loc = No_Location then
1279 elsif T2.Loc = No_Location then
1282 -- Fourth test: for same entity, sort by reference location unit
1284 elsif T1.Lun /= T2.Lun then
1285 return Dependency_Num (T1.Lun) < Dependency_Num (T2.Lun);
1287 -- Fifth test: order of location within referencing unit
1289 elsif T1.Loc /= T2.Loc then
1290 return T1.Loc < T2.Loc;
1292 -- Finally, for two locations at the same address, we prefer
1293 -- the one that does NOT have the type 'r' so that a modification
1294 -- or extension takes preference, when there are more than one
1295 -- reference at the same location.
1298 return T2.Typ = 'r';
1306 procedure Move (From : Natural; To : Natural) is
1308 Rnums (Nat (To)) := Rnums (Nat (From));
1315 -- Why a string comparison here??? Why not compare Name_Id values???
1317 function Name_Change (X : Entity_Id) return Boolean is
1319 Get_Unqualified_Name_String (Chars (X));
1321 if Name_Len /= Curlen then
1325 return Name_Buffer (1 .. Curlen) /= Curnam (1 .. Curlen);
1329 -- Start of processing for Output_Refs
1332 -- Capture the definition Sloc values. We delay doing this till now,
1333 -- since at the time the reference or definition is made, private
1334 -- types may be swapped, and the Sloc value may be incorrect. We
1335 -- also set up the pointer vector for the sort.
1337 for J in 1 .. Nrefs loop
1339 Xrefs.Table (J).Def :=
1340 Original_Location (Sloc (Xrefs.Table (J).Ent));
1343 -- Sort the references
1345 Sorting.Sort (Integer (Nrefs));
1347 -- Eliminate duplicate entries
1350 NR : constant Nat := Nrefs;
1353 -- We need this test for NR because if we force ALI file
1354 -- generation in case of errors detected, it may be the case
1355 -- that Nrefs is 0, so we should not reset it here
1360 for J in 2 .. NR loop
1361 if Xrefs.Table (Rnums (J)) /=
1362 Xrefs.Table (Rnums (Nrefs))
1365 Rnums (Nrefs) := Rnums (J);
1371 -- Initialize loop through references
1375 Curdef := No_Location;
1377 Crloc := No_Location;
1379 -- Loop to output references
1381 for Refno in 1 .. Nrefs loop
1382 Output_One_Ref : declare
1388 pragma Warnings (Off, WC);
1389 pragma Warnings (Off, Err);
1391 XE : Xref_Entry renames Xrefs.Table (Rnums (Refno));
1392 -- The current entry to be accessed
1395 -- Used to index into source buffer to get entity name
1399 -- Used for {} or <> or () for type reference
1401 procedure Check_Type_Reference
1403 List_Interface : Boolean);
1404 -- Find whether there is a meaningful type reference for
1405 -- Ent, and display it accordingly. If List_Interface is
1406 -- true, then Ent is a progenitor interface of the current
1407 -- type entity being listed. In that case list it as is,
1408 -- without looking for a type reference for it.
1410 procedure Output_Instantiation_Refs (Loc : Source_Ptr);
1411 -- Recursive procedure to output instantiation references for
1412 -- the given source ptr in [file|line[...]] form. No output
1413 -- if the given location is not a generic template reference.
1415 procedure Output_Overridden_Op (Old_E : Entity_Id);
1416 -- For a subprogram that is overriding, display information
1417 -- about the inherited operation that it overrides.
1419 --------------------------
1420 -- Check_Type_Reference --
1421 --------------------------
1423 procedure Check_Type_Reference
1425 List_Interface : Boolean)
1428 if List_Interface then
1430 -- This is a progenitor interface of the type for which
1431 -- xref information is being generated.
1438 Get_Type_Reference (Ent, Tref, Left, Right);
1441 if Present (Tref) then
1443 -- Case of standard entity, output name
1445 if Sloc (Tref) = Standard_Location then
1446 Write_Info_Char (Left);
1447 Write_Info_Name (Chars (Tref));
1448 Write_Info_Char (Right);
1450 -- Case of source entity, output location
1453 Write_Info_Char (Left);
1454 Trunit := Get_Source_Unit (Sloc (Tref));
1456 if Trunit /= Curxu then
1457 Write_Info_Nat (Dependency_Num (Trunit));
1458 Write_Info_Char ('|');
1462 (Int (Get_Logical_Line_Number (Sloc (Tref))));
1470 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1473 and then Present (Full_View (Ent))
1475 Ent := Underlying_Type (Ent);
1477 if Present (Ent) then
1478 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1482 Write_Info_Char (Ctyp);
1486 (Int (Get_Column_Number (Sloc (Tref))));
1488 -- If the type comes from an instantiation, add the
1489 -- corresponding info.
1491 Output_Instantiation_Refs (Sloc (Tref));
1492 Write_Info_Char (Right);
1495 end Check_Type_Reference;
1497 -------------------------------
1498 -- Output_Instantiation_Refs --
1499 -------------------------------
1501 procedure Output_Instantiation_Refs (Loc : Source_Ptr) is
1502 Iloc : constant Source_Ptr := Instantiation_Location (Loc);
1503 Lun : Unit_Number_Type;
1504 Cu : constant Unit_Number_Type := Curru;
1507 -- Nothing to do if this is not an instantiation
1509 if Iloc = No_Location then
1513 -- Output instantiation reference
1515 Write_Info_Char ('[');
1516 Lun := Get_Source_Unit (Iloc);
1518 if Lun /= Curru then
1520 Write_Info_Nat (Dependency_Num (Curru));
1521 Write_Info_Char ('|');
1524 Write_Info_Nat (Int (Get_Logical_Line_Number (Iloc)));
1526 -- Recursive call to get nested instantiations
1528 Output_Instantiation_Refs (Iloc);
1530 -- Output final ] after call to get proper nesting
1532 Write_Info_Char (']');
1535 end Output_Instantiation_Refs;
1537 --------------------------
1538 -- Output_Overridden_Op --
1539 --------------------------
1541 procedure Output_Overridden_Op (Old_E : Entity_Id) is
1544 and then Sloc (Old_E) /= Standard_Location
1547 Loc : constant Source_Ptr := Sloc (Old_E);
1548 Par_Unit : constant Unit_Number_Type :=
1549 Get_Source_Unit (Loc);
1551 Write_Info_Char ('<');
1553 if Par_Unit /= Curxu then
1554 Write_Info_Nat (Dependency_Num (Par_Unit));
1555 Write_Info_Char ('|');
1558 Write_Info_Nat (Int (Get_Logical_Line_Number (Loc)));
1559 Write_Info_Char ('p');
1560 Write_Info_Nat (Int (Get_Column_Number (Loc)));
1561 Write_Info_Char ('>');
1564 end Output_Overridden_Op;
1566 -- Start of processing for Output_One_Ref
1570 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1572 -- Skip reference if it is the only reference to an entity,
1573 -- and it is an END line reference, and the entity is not in
1574 -- the current extended source. This prevents junk entries
1575 -- consisting only of packages with END lines, where no
1576 -- entity from the package is actually referenced.
1579 and then Ent /= Curent
1580 and then (Refno = Nrefs or else
1581 Ent /= Xrefs.Table (Rnums (Refno + 1)).Ent)
1583 not In_Extended_Main_Source_Unit (Ent)
1588 -- For private type, get full view type
1591 and then Present (Full_View (XE.Ent))
1593 Ent := Underlying_Type (Ent);
1595 if Present (Ent) then
1596 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1600 -- Special exception for Boolean
1602 if Ctyp = 'E' and then Is_Boolean_Type (Ent) then
1606 -- For variable reference, get corresponding type
1609 Ent := Etype (XE.Ent);
1610 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1612 -- If variable is private type, get full view type
1615 and then Present (Full_View (Etype (XE.Ent)))
1617 Ent := Underlying_Type (Etype (XE.Ent));
1619 if Present (Ent) then
1620 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1623 elsif Is_Generic_Type (Ent) then
1625 -- If the type of the entity is a generic private type,
1626 -- there is no usable full view, so retain the indication
1627 -- that this is an object.
1632 -- Special handling for access parameter
1635 K : constant Entity_Kind := Ekind (Etype (XE.Ent));
1638 if (K = E_Anonymous_Access_Type
1640 K = E_Anonymous_Access_Subprogram_Type
1642 E_Anonymous_Access_Protected_Subprogram_Type)
1643 and then Is_Formal (XE.Ent)
1647 -- Special handling for Boolean
1649 elsif Ctyp = 'e' and then Is_Boolean_Type (Ent) then
1655 -- Special handling for abstract types and operations
1657 if Is_Overloadable (XE.Ent)
1658 and then Is_Abstract_Subprogram (XE.Ent)
1661 Ctyp := 'x'; -- Abstract procedure
1663 elsif Ctyp = 'V' then
1664 Ctyp := 'y'; -- Abstract function
1667 elsif Is_Type (XE.Ent)
1668 and then Is_Abstract_Type (XE.Ent)
1670 if Is_Interface (XE.Ent) then
1673 elsif Ctyp = 'R' then
1674 Ctyp := 'H'; -- Abstract type
1678 -- Only output reference if interesting type of entity, and
1679 -- suppress self references, except for bodies that act as
1680 -- specs. Also suppress definitions of body formals (we only
1681 -- treat these as references, and the references were
1682 -- separately recorded).
1685 or else (XE.Loc = XE.Def
1688 or else not Is_Subprogram (XE.Ent)))
1689 or else (Is_Formal (XE.Ent)
1690 and then Present (Spec_Entity (XE.Ent)))
1695 -- Start new Xref section if new xref unit
1697 if XE.Eun /= Curxu then
1698 if Write_Info_Col > 1 then
1703 Cursrc := Source_Text (Source_Index (Curxu));
1705 Write_Info_Initiate ('X');
1706 Write_Info_Char (' ');
1707 Write_Info_Nat (Dependency_Num (XE.Eun));
1708 Write_Info_Char (' ');
1709 Write_Info_Name (Reference_Name (Source_Index (XE.Eun)));
1712 -- Start new Entity line if new entity. Note that we
1713 -- consider two entities the same if they have the same
1714 -- name and source location. This causes entities in
1715 -- instantiations to be treated as though they referred
1722 (Name_Change (XE.Ent) or else XE.Def /= Curdef))
1727 Get_Unqualified_Name_String (Chars (XE.Ent));
1729 Curnam (1 .. Curlen) := Name_Buffer (1 .. Curlen);
1731 if Write_Info_Col > 1 then
1735 -- Write column number information
1737 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Def)));
1738 Write_Info_Char (Ctyp);
1739 Write_Info_Nat (Int (Get_Column_Number (XE.Def)));
1741 -- Write level information
1743 Write_Level_Info : declare
1744 function Is_Visible_Generic_Entity
1745 (E : Entity_Id) return Boolean;
1746 -- Check whether E is declared in the visible part
1747 -- of a generic package. For source navigation
1748 -- purposes, treat this as a visible entity.
1750 function Is_Private_Record_Component
1751 (E : Entity_Id) return Boolean;
1752 -- Check whether E is a non-inherited component of a
1753 -- private extension. Even if the enclosing record is
1754 -- public, we want to treat the component as private
1755 -- for navigation purposes.
1757 ---------------------------------
1758 -- Is_Private_Record_Component --
1759 ---------------------------------
1761 function Is_Private_Record_Component
1762 (E : Entity_Id) return Boolean
1764 S : constant Entity_Id := Scope (E);
1767 Ekind (E) = E_Component
1768 and then Nkind (Declaration_Node (S)) =
1769 N_Private_Extension_Declaration
1770 and then Original_Record_Component (E) = E;
1771 end Is_Private_Record_Component;
1773 -------------------------------
1774 -- Is_Visible_Generic_Entity --
1775 -------------------------------
1777 function Is_Visible_Generic_Entity
1778 (E : Entity_Id) return Boolean
1783 if Ekind (Scope (E)) /= E_Generic_Package then
1788 while Present (Par) loop
1790 Nkind (Par) = N_Generic_Package_Declaration
1792 -- Entity is a generic formal
1797 Nkind (Parent (Par)) = N_Package_Specification
1800 Is_List_Member (Par)
1801 and then List_Containing (Par) =
1802 Visible_Declarations (Parent (Par));
1804 Par := Parent (Par);
1809 end Is_Visible_Generic_Entity;
1811 -- Start of processing for Write_Level_Info
1814 if Is_Hidden (Curent)
1815 or else Is_Private_Record_Component (Curent)
1817 Write_Info_Char (' ');
1821 or else Is_Visible_Generic_Entity (Curent)
1823 Write_Info_Char ('*');
1826 Write_Info_Char (' ');
1828 end Write_Level_Info;
1830 -- Output entity name. We use the occurrence from the
1831 -- actual source program at the definition point.
1833 P := Original_Location (Sloc (XE.Ent));
1835 -- Entity is character literal
1837 if Cursrc (P) = ''' then
1838 Write_Info_Char (Cursrc (P));
1839 Write_Info_Char (Cursrc (P + 1));
1840 Write_Info_Char (Cursrc (P + 2));
1842 -- Entity is operator symbol
1844 elsif Cursrc (P) = '"' or else Cursrc (P) = '%' then
1845 Write_Info_Char (Cursrc (P));
1850 Write_Info_Char (Cursrc (P2));
1851 exit when Cursrc (P2) = Cursrc (P);
1854 -- Entity is identifier
1858 if Is_Start_Of_Wide_Char (Cursrc, P) then
1859 Scan_Wide (Cursrc, P, WC, Err);
1860 elsif not Identifier_Char (Cursrc (P)) then
1867 -- Write out the identifier by copying the exact
1868 -- source characters used in its declaration. Note
1869 -- that this means wide characters will be in their
1870 -- original encoded form.
1873 Original_Location (Sloc (XE.Ent)) .. P - 1
1875 Write_Info_Char (Cursrc (J));
1879 -- See if we have a renaming reference
1881 if Is_Object (XE.Ent)
1882 and then Present (Renamed_Object (XE.Ent))
1884 Rref := Renamed_Object (XE.Ent);
1886 elsif Is_Overloadable (XE.Ent)
1887 and then Nkind (Parent (Declaration_Node (XE.Ent))) =
1888 N_Subprogram_Renaming_Declaration
1890 Rref := Name (Parent (Declaration_Node (XE.Ent)));
1892 elsif Ekind (XE.Ent) = E_Package
1893 and then Nkind (Declaration_Node (XE.Ent)) =
1894 N_Package_Renaming_Declaration
1896 Rref := Name (Declaration_Node (XE.Ent));
1902 if Present (Rref) then
1903 if Nkind (Rref) = N_Expanded_Name then
1904 Rref := Selector_Name (Rref);
1907 if Nkind (Rref) = N_Identifier
1908 or else Nkind (Rref) = N_Operator_Symbol
1912 -- For renamed array components, use the array name
1913 -- for the renamed entity, which reflect the fact that
1914 -- in general the whole array is aliased.
1916 elsif Nkind (Rref) = N_Indexed_Component then
1917 if Nkind (Prefix (Rref)) = N_Identifier then
1918 Rref := Prefix (Rref);
1919 elsif Nkind (Prefix (Rref)) = N_Expanded_Name then
1920 Rref := Selector_Name (Prefix (Rref));
1930 -- Write out renaming reference if we have one
1932 if Present (Rref) then
1933 Write_Info_Char ('=');
1935 (Int (Get_Logical_Line_Number (Sloc (Rref))));
1936 Write_Info_Char (':');
1938 (Int (Get_Column_Number (Sloc (Rref))));
1941 -- Indicate that the entity is in the unit of the current
1946 -- Write out information about generic parent, if entity
1949 if Is_Generic_Instance (XE.Ent) then
1951 Gen_Par : constant Entity_Id :=
1954 (Unit_Declaration_Node (XE.Ent)));
1955 Loc : constant Source_Ptr := Sloc (Gen_Par);
1956 Gen_U : constant Unit_Number_Type :=
1957 Get_Source_Unit (Loc);
1960 Write_Info_Char ('[');
1961 if Curru /= Gen_U then
1962 Write_Info_Nat (Dependency_Num (Gen_U));
1963 Write_Info_Char ('|');
1967 (Int (Get_Logical_Line_Number (Loc)));
1968 Write_Info_Char (']');
1972 -- See if we have a type reference and if so output
1974 Check_Type_Reference (XE.Ent, False);
1976 -- Additional information for types with progenitors
1978 if Is_Record_Type (XE.Ent)
1979 and then Present (Abstract_Interfaces (XE.Ent))
1985 Elmt := First_Elmt (Abstract_Interfaces (XE.Ent));
1986 while Present (Elmt) loop
1987 Check_Type_Reference (Node (Elmt), True);
1992 -- For array types, list index types as well.
1993 -- (This is not C, indices have distinct types).
1995 elsif Is_Array_Type (XE.Ent) then
1999 Indx := First_Index (XE.Ent);
2000 while Present (Indx) loop
2001 Check_Type_Reference
2002 (First_Subtype (Etype (Indx)), True);
2008 -- If the entity is an overriding operation, write info
2009 -- on operation that was overridden.
2011 if Is_Subprogram (XE.Ent)
2012 and then Is_Overriding_Operation (XE.Ent)
2014 Output_Overridden_Op (Overridden_Operation (XE.Ent));
2017 -- End of processing for entity output
2019 Crloc := No_Location;
2022 -- Output the reference
2024 if XE.Loc /= No_Location
2025 and then XE.Loc /= Crloc
2029 -- Start continuation if line full, else blank
2031 if Write_Info_Col > 72 then
2033 Write_Info_Initiate ('.');
2036 Write_Info_Char (' ');
2038 -- Output file number if changed
2040 if XE.Lun /= Curru then
2042 Write_Info_Nat (Dependency_Num (Curru));
2043 Write_Info_Char ('|');
2046 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Loc)));
2047 Write_Info_Char (XE.Typ);
2049 if Is_Overloadable (XE.Ent)
2050 and then Is_Imported (XE.Ent)
2051 and then XE.Typ = 'b'
2053 Output_Import_Export_Info (XE.Ent);
2056 Write_Info_Nat (Int (Get_Column_Number (XE.Loc)));
2058 Output_Instantiation_Refs (Sloc (XE.Ent));
2069 end Output_References;