1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1998-2010, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 with Atree; use Atree;
27 with Csets; use Csets;
28 with Elists; use Elists;
29 with Errout; use Errout;
30 with Lib.Util; use Lib.Util;
31 with Nlists; use Nlists;
33 with Restrict; use Restrict;
34 with Rident; use Rident;
36 with Sem_Aux; use Sem_Aux;
37 with Sem_Prag; use Sem_Prag;
38 with Sem_Util; use Sem_Util;
39 with Sem_Warn; use Sem_Warn;
40 with Sinfo; use Sinfo;
41 with Sinput; use Sinput;
42 with Snames; use Snames;
43 with Stringt; use Stringt;
44 with Stand; use Stand;
45 with Table; use Table;
46 with Widechar; use Widechar;
48 with GNAT.Heap_Sort_G;
50 package body Lib.Xref is
56 -- The Xref table is used to record references. The Loc field is set
57 -- to No_Location for a definition entry.
59 subtype Xref_Entry_Number is Int;
61 type Xref_Entry is record
63 -- Entity referenced (E parameter to Generate_Reference)
66 -- Original source location for entity being referenced. Note that these
67 -- values are used only during the output process, they are not set when
68 -- the entries are originally built. This is because private entities
69 -- can be swapped when the initial call is made.
72 -- Location of reference (Original_Location (Sloc field of N parameter
73 -- to Generate_Reference). Set to No_Location for the case of a
74 -- defining occurrence.
77 -- Reference type (Typ param to Generate_Reference)
79 Eun : Unit_Number_Type;
80 -- Unit number corresponding to Ent
82 Lun : Unit_Number_Type;
83 -- Unit number corresponding to Loc. Value is undefined and not
84 -- referenced if Loc is set to No_Location.
88 package Xrefs is new Table.Table (
89 Table_Component_Type => Xref_Entry,
90 Table_Index_Type => Xref_Entry_Number,
92 Table_Initial => Alloc.Xrefs_Initial,
93 Table_Increment => Alloc.Xrefs_Increment,
94 Table_Name => "Xrefs");
96 ------------------------
97 -- Local Subprograms --
98 ------------------------
100 procedure Generate_Prim_Op_References (Typ : Entity_Id);
101 -- For a tagged type, generate implicit references to its primitive
102 -- operations, for source navigation. This is done right before emitting
103 -- cross-reference information rather than at the freeze point of the type
104 -- in order to handle late bodies that are primitive operations.
106 -------------------------
107 -- Generate_Definition --
108 -------------------------
110 procedure Generate_Definition (E : Entity_Id) is
115 pragma Assert (Nkind (E) in N_Entity);
117 -- Note that we do not test Xref_Entity_Letters here. It is too early
118 -- to do so, since we are often called before the entity is fully
119 -- constructed, so that the Ekind is still E_Void.
123 -- Definition must come from source
125 -- We make an exception for subprogram child units that have no spec.
126 -- For these we generate a subprogram declaration for library use,
127 -- and the corresponding entity does not come from source.
128 -- Nevertheless, all references will be attached to it and we have
129 -- to treat is as coming from user code.
131 and then (Comes_From_Source (E) or else Is_Child_Unit (E))
133 -- And must have a reasonable source location that is not
134 -- within an instance (all entities in instances are ignored)
136 and then Sloc (E) > No_Location
137 and then Instantiation_Location (Sloc (E)) = No_Location
139 -- And must be a non-internal name from the main source unit
141 and then In_Extended_Main_Source_Unit (E)
142 and then not Is_Internal_Name (Chars (E))
144 Xrefs.Increment_Last;
146 Loc := Original_Location (Sloc (E));
148 Xrefs.Table (Indx).Ent := E;
149 Xrefs.Table (Indx).Def := No_Location;
150 Xrefs.Table (Indx).Loc := No_Location;
151 Xrefs.Table (Indx).Typ := ' ';
152 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
153 Xrefs.Table (Indx).Lun := No_Unit;
154 Set_Has_Xref_Entry (E);
156 if In_Inlined_Body then
160 end Generate_Definition;
162 ---------------------------------
163 -- Generate_Operator_Reference --
164 ---------------------------------
166 procedure Generate_Operator_Reference
171 if not In_Extended_Main_Source_Unit (N) then
175 -- If the operator is not a Standard operator, then we generate a real
176 -- reference to the user defined operator.
178 if Sloc (Entity (N)) /= Standard_Location then
179 Generate_Reference (Entity (N), N);
181 -- A reference to an implicit inequality operator is also a reference
182 -- to the user-defined equality.
184 if Nkind (N) = N_Op_Ne
185 and then not Comes_From_Source (Entity (N))
186 and then Present (Corresponding_Equality (Entity (N)))
188 Generate_Reference (Corresponding_Equality (Entity (N)), N);
191 -- For the case of Standard operators, we mark the result type as
192 -- referenced. This ensures that in the case where we are using a
193 -- derived operator, we mark an entity of the unit that implicitly
194 -- defines this operator as used. Otherwise we may think that no entity
195 -- of the unit is used. The actual entity marked as referenced is the
196 -- first subtype, which is the relevant user defined entity.
198 -- Note: we only do this for operators that come from source. The
199 -- generated code sometimes reaches for entities that do not need to be
200 -- explicitly visible (for example, when we expand the code for
201 -- comparing two record objects, the fields of the record may not be
204 elsif Comes_From_Source (N) then
205 Set_Referenced (First_Subtype (T));
207 end Generate_Operator_Reference;
209 ---------------------------------
210 -- Generate_Prim_Op_References --
211 ---------------------------------
213 procedure Generate_Prim_Op_References (Typ : Entity_Id) is
216 Prim_List : Elist_Id;
219 -- Handle subtypes of synchronized types
221 if Ekind (Typ) = E_Protected_Subtype
222 or else Ekind (Typ) = E_Task_Subtype
224 Base_T := Etype (Typ);
229 -- References to primitive operations are only relevant for tagged types
231 if not Is_Tagged_Type (Base_T)
232 or else Is_Class_Wide_Type (Base_T)
237 -- Ada 2005 (AI-345): For synchronized types generate reference
238 -- to the wrapper that allow us to dispatch calls through their
239 -- implemented abstract interface types.
241 -- The check for Present here is to protect against previously
242 -- reported critical errors.
244 if Is_Concurrent_Type (Base_T)
245 and then Present (Corresponding_Record_Type (Base_T))
247 Prim_List := Primitive_Operations
248 (Corresponding_Record_Type (Base_T));
250 Prim_List := Primitive_Operations (Base_T);
253 if No (Prim_List) then
257 Prim := First_Elmt (Prim_List);
258 while Present (Prim) loop
260 -- If the operation is derived, get the original for cross-reference
261 -- reference purposes (it is the original for which we want the xref
262 -- and for which the comes_from_source test must be performed).
265 (Typ, Ultimate_Alias (Node (Prim)), 'p', Set_Ref => False);
268 end Generate_Prim_Op_References;
270 ------------------------
271 -- Generate_Reference --
272 ------------------------
274 procedure Generate_Reference
277 Typ : Character := 'r';
278 Set_Ref : Boolean := True;
279 Force : Boolean := False)
289 -- Used for call to Find_Actual
292 -- If Formal is non-Empty, then its Ekind, otherwise E_Void
294 function Is_On_LHS (Node : Node_Id) return Boolean;
295 -- Used to check if a node is on the left hand side of an assignment.
296 -- The following cases are handled:
298 -- Variable Node is a direct descendant of left hand side of an
299 -- assignment statement.
301 -- Prefix Of an indexed or selected component that is present in
302 -- a subtree rooted by an assignment statement. There is
303 -- no restriction of nesting of components, thus cases
304 -- such as A.B (C).D are handled properly. However a prefix
305 -- of a dereference (either implicit or explicit) is never
306 -- considered as on a LHS.
308 -- Out param Same as above cases, but OUT parameter
310 function OK_To_Set_Referenced return Boolean;
311 -- Returns True if the Referenced flag can be set. There are a few
312 -- exceptions where we do not want to set this flag, see body for
313 -- details of these exceptional cases.
319 -- ??? There are several routines here and there that perform a similar
320 -- (but subtly different) computation, which should be factored:
322 -- Sem_Util.May_Be_Lvalue
323 -- Sem_Util.Known_To_Be_Assigned
324 -- Exp_Ch2.Expand_Entry_Parameter.In_Assignment_Context
325 -- Exp_Smem.Is_Out_Actual
327 function Is_On_LHS (Node : Node_Id) return Boolean is
333 -- Only identifiers are considered, is this necessary???
335 if Nkind (Node) /= N_Identifier then
339 -- Immediate return if appeared as OUT parameter
341 if Kind = E_Out_Parameter then
345 -- Search for assignment statement subtree root
352 if K = N_Assignment_Statement then
355 -- Check whether the parent is a component and the current node is
356 -- its prefix, but return False if the current node has an access
357 -- type, as in that case the selected or indexed component is an
358 -- implicit dereference, and the LHS is the designated object, not
359 -- the access object.
361 -- ??? case of a slice assignment?
363 -- ??? Note that in some cases this is called too early
364 -- (see comments in Sem_Ch8.Find_Direct_Name), at a point where
365 -- the tree is not fully typed yet. In that case we may lack
366 -- an Etype for N, and we must disable the check for an implicit
367 -- dereference. If the dereference is on an LHS, this causes a
370 elsif (K = N_Selected_Component or else K = N_Indexed_Component)
371 and then Prefix (P) = N
372 and then not (Present (Etype (N))
374 Is_Access_Type (Etype (N)))
378 -- All other cases, definitely not on left side
386 ---------------------------
387 -- OK_To_Set_Referenced --
388 ---------------------------
390 function OK_To_Set_Referenced return Boolean is
394 -- A reference from a pragma Unreferenced or pragma Unmodified or
395 -- pragma Warnings does not cause the Referenced flag to be set.
396 -- This avoids silly warnings about things being referenced and
397 -- not assigned when the only reference is from the pragma.
399 if Nkind (N) = N_Identifier then
402 if Nkind (P) = N_Pragma_Argument_Association then
405 if Nkind (P) = N_Pragma then
406 if Pragma_Name (P) = Name_Warnings
408 Pragma_Name (P) = Name_Unmodified
410 Pragma_Name (P) = Name_Unreferenced
419 end OK_To_Set_Referenced;
421 -- Start of processing for Generate_Reference
424 pragma Assert (Nkind (E) in N_Entity);
425 Find_Actual (N, Formal, Call);
427 if Present (Formal) then
428 Kind := Ekind (Formal);
433 -- Check for obsolescent reference to package ASCII. GNAT treats this
434 -- element of annex J specially since in practice, programs make a lot
435 -- of use of this feature, so we don't include it in the set of features
436 -- diagnosed when Warn_On_Obsolescent_Features mode is set. However we
437 -- are required to note it as a violation of the RM defined restriction.
439 if E = Standard_ASCII then
440 Check_Restriction (No_Obsolescent_Features, N);
443 -- Check for reference to entity marked with Is_Obsolescent
445 -- Note that we always allow obsolescent references in the compiler
446 -- itself and the run time, since we assume that we know what we are
447 -- doing in such cases. For example the calls in Ada.Characters.Handling
448 -- to its own obsolescent subprograms are just fine.
450 -- In any case we do not generate warnings within the extended source
451 -- unit of the entity in question, since we assume the source unit
452 -- itself knows what is going on (and for sure we do not want silly
453 -- warnings, e.g. on the end line of an obsolescent procedure body).
455 if Is_Obsolescent (E)
456 and then not GNAT_Mode
457 and then not In_Extended_Main_Source_Unit (E)
459 Check_Restriction (No_Obsolescent_Features, N);
461 if Warn_On_Obsolescent_Feature then
462 Output_Obsolescent_Entity_Warnings (N, E);
466 -- Warn if reference to Ada 2005 entity not in Ada 2005 mode. We only
467 -- detect real explicit references (modifications and references).
469 if Comes_From_Source (N)
470 and then Is_Ada_2005_Only (E)
471 and then Ada_Version < Ada_2005
472 and then Warn_On_Ada_2005_Compatibility
473 and then (Typ = 'm' or else Typ = 'r' or else Typ = 's')
475 Error_Msg_NE ("& is only defined in Ada 2005?", N, E);
478 -- Warn if reference to Ada 2012 entity not in Ada 2012 mode. We only
479 -- detect real explicit references (modifications and references).
481 if Comes_From_Source (N)
482 and then Is_Ada_2012_Only (E)
483 and then Ada_Version < Ada_2012
484 and then Warn_On_Ada_2012_Compatibility
485 and then (Typ = 'm' or else Typ = 'r')
487 Error_Msg_NE ("& is only defined in Ada 2012?", N, E);
490 -- Never collect references if not in main source unit. However, we omit
491 -- this test if Typ is 'e' or 'k', since these entries are structural,
492 -- and it is useful to have them in units that reference packages as
493 -- well as units that define packages. We also omit the test for the
494 -- case of 'p' since we want to include inherited primitive operations
495 -- from other packages.
497 -- We also omit this test is this is a body reference for a subprogram
498 -- instantiation. In this case the reference is to the generic body,
499 -- which clearly need not be in the main unit containing the instance.
500 -- For the same reason we accept an implicit reference generated for
501 -- a default in an instance.
503 if not In_Extended_Main_Source_Unit (N) then
508 or else (Typ = 'b' and then Is_Generic_Instance (E))
516 -- For reference type p, the entity must be in main source unit
518 if Typ = 'p' and then not In_Extended_Main_Source_Unit (E) then
522 -- Unless the reference is forced, we ignore references where the
523 -- reference itself does not come from source.
525 if not Force and then not Comes_From_Source (N) then
529 -- Deal with setting entity as referenced, unless suppressed. Note that
530 -- we still do Set_Referenced on entities that do not come from source.
531 -- This situation arises when we have a source reference to a derived
532 -- operation, where the derived operation itself does not come from
533 -- source, but we still want to mark it as referenced, since we really
534 -- are referencing an entity in the corresponding package (this avoids
535 -- wrong complaints that the package contains no referenced entities).
539 -- Assignable object appearing on left side of assignment or as
543 and then Is_On_LHS (N)
544 and then Ekind (E) /= E_In_Out_Parameter
546 -- For objects that are renamings, just set as simply referenced
547 -- we do not try to do assignment type tracking in this case.
549 if Present (Renamed_Object (E)) then
552 -- Out parameter case
554 elsif Kind = E_Out_Parameter then
556 -- If warning mode for all out parameters is set, or this is
557 -- the only warning parameter, then we want to mark this for
558 -- later warning logic by setting Referenced_As_Out_Parameter
560 if Warn_On_Modified_As_Out_Parameter (Formal) then
561 Set_Referenced_As_Out_Parameter (E, True);
562 Set_Referenced_As_LHS (E, False);
564 -- For OUT parameter not covered by the above cases, we simply
565 -- regard it as a normal reference (in this case we do not
566 -- want any of the warning machinery for out parameters).
572 -- For the left hand of an assignment case, we do nothing here.
573 -- The processing for Analyze_Assignment_Statement will set the
574 -- Referenced_As_LHS flag.
580 -- Check for a reference in a pragma that should not count as a
581 -- making the variable referenced for warning purposes.
583 elsif Is_Non_Significant_Pragma_Reference (N) then
586 -- A reference in an attribute definition clause does not count as a
587 -- reference except for the case of Address. The reason that 'Address
588 -- is an exception is that it creates an alias through which the
589 -- variable may be referenced.
591 elsif Nkind (Parent (N)) = N_Attribute_Definition_Clause
592 and then Chars (Parent (N)) /= Name_Address
593 and then N = Name (Parent (N))
597 -- Constant completion does not count as a reference
600 and then Ekind (E) = E_Constant
604 -- Record representation clause does not count as a reference
606 elsif Nkind (N) = N_Identifier
607 and then Nkind (Parent (N)) = N_Record_Representation_Clause
611 -- Discriminants do not need to produce a reference to record type
614 and then Nkind (Parent (N)) = N_Discriminant_Specification
621 -- Special processing for IN OUT parameters, where we have an
622 -- implicit assignment to a simple variable.
624 if Kind = E_In_Out_Parameter
625 and then Is_Assignable (E)
627 -- For sure this counts as a normal read reference
630 Set_Last_Assignment (E, Empty);
632 -- We count it as being referenced as an out parameter if the
633 -- option is set to warn on all out parameters, except that we
634 -- have a special exclusion for an intrinsic subprogram, which
635 -- is most likely an instantiation of Unchecked_Deallocation
636 -- which we do not want to consider as an assignment since it
637 -- generates false positives. We also exclude the case of an
638 -- IN OUT parameter if the name of the procedure is Free,
639 -- since we suspect similar semantics.
641 if Warn_On_All_Unread_Out_Parameters
642 and then Is_Entity_Name (Name (Call))
643 and then not Is_Intrinsic_Subprogram (Entity (Name (Call)))
644 and then Chars (Name (Call)) /= Name_Free
646 Set_Referenced_As_Out_Parameter (E, True);
647 Set_Referenced_As_LHS (E, False);
650 -- Don't count a recursive reference within a subprogram as a
651 -- reference (that allows detection of a recursive subprogram
652 -- whose only references are recursive calls as unreferenced).
654 elsif Is_Subprogram (E)
655 and then E = Nearest_Dynamic_Scope (Current_Scope)
659 -- Any other occurrence counts as referencing the entity
661 elsif OK_To_Set_Referenced then
664 -- If variable, this is an OK reference after an assignment
665 -- so we can clear the Last_Assignment indication.
667 if Is_Assignable (E) then
668 Set_Last_Assignment (E, Empty);
673 -- Check for pragma Unreferenced given and reference is within
674 -- this source unit (occasion for possible warning to be issued).
676 if Has_Unreferenced (E)
677 and then In_Same_Extended_Unit (E, N)
679 -- A reference as a named parameter in a call does not count
680 -- as a violation of pragma Unreferenced for this purpose...
682 if Nkind (N) = N_Identifier
683 and then Nkind (Parent (N)) = N_Parameter_Association
684 and then Selector_Name (Parent (N)) = N
688 -- ... Neither does a reference to a variable on the left side
691 elsif Is_On_LHS (N) then
694 -- For entry formals, we want to place the warning message on the
695 -- corresponding entity in the accept statement. The current scope
696 -- is the body of the accept, so we find the formal whose name
697 -- matches that of the entry formal (there is no link between the
698 -- two entities, and the one in the accept statement is only used
699 -- for conformance checking).
701 elsif Ekind (Scope (E)) = E_Entry then
706 BE := First_Entity (Current_Scope);
707 while Present (BE) loop
708 if Chars (BE) = Chars (E) then
709 Error_Msg_NE -- CODEFIX
710 ("?pragma Unreferenced given for&!", N, BE);
718 -- Here we issue the warning, since this is a real reference
721 Error_Msg_NE -- CODEFIX
722 ("?pragma Unreferenced given for&!", N, E);
726 -- If this is a subprogram instance, mark as well the internal
727 -- subprogram in the wrapper package, which may be a visible
730 if Is_Overloadable (E)
731 and then Is_Generic_Instance (E)
732 and then Present (Alias (E))
734 Set_Referenced (Alias (E));
738 -- Generate reference if all conditions are met:
741 -- Cross referencing must be active
745 -- The entity must be one for which we collect references
747 and then Xref_Entity_Letters (Ekind (E)) /= ' '
749 -- Both Sloc values must be set to something sensible
751 and then Sloc (E) > No_Location
752 and then Sloc (N) > No_Location
754 -- We ignore references from within an instance, except for default
755 -- subprograms, for which we generate an implicit reference.
758 (Instantiation_Location (Sloc (N)) = No_Location or else Typ = 'i')
760 -- Ignore dummy references
764 if Nkind (N) = N_Identifier
766 Nkind (N) = N_Defining_Identifier
770 Nkind (N) = N_Defining_Operator_Symbol
772 Nkind (N) = N_Operator_Symbol
774 (Nkind (N) = N_Character_Literal
775 and then Sloc (Entity (N)) /= Standard_Location)
777 Nkind (N) = N_Defining_Character_Literal
781 elsif Nkind (N) = N_Expanded_Name
783 Nkind (N) = N_Selected_Component
785 Nod := Selector_Name (N);
791 -- Normal case of source entity comes from source
793 if Comes_From_Source (E) then
796 -- Entity does not come from source, but is a derived subprogram and
797 -- the derived subprogram comes from source (after one or more
798 -- derivations) in which case the reference is to parent subprogram.
800 elsif Is_Overloadable (E)
801 and then Present (Alias (E))
804 while not Comes_From_Source (Ent) loop
805 if No (Alias (Ent)) then
812 -- The internally created defining entity for a child subprogram
813 -- that has no previous spec has valid references.
815 elsif Is_Overloadable (E)
816 and then Is_Child_Unit (E)
820 -- Record components of discriminated subtypes or derived types must
821 -- be treated as references to the original component.
823 elsif Ekind (E) = E_Component
824 and then Comes_From_Source (Original_Record_Component (E))
826 Ent := Original_Record_Component (E);
828 -- If this is an expanded reference to a discriminant, recover the
829 -- original discriminant, which gets the reference.
831 elsif Ekind (E) = E_In_Parameter
832 and then Present (Discriminal_Link (E))
834 Ent := Discriminal_Link (E);
835 Set_Referenced (Ent);
837 -- Ignore reference to any other entity that is not from source
843 -- Record reference to entity
845 Ref := Original_Location (Sloc (Nod));
846 Def := Original_Location (Sloc (Ent));
848 Xrefs.Increment_Last;
851 Xrefs.Table (Indx).Loc := Ref;
853 -- Overriding operations are marked with 'P'
856 and then Is_Subprogram (N)
857 and then Is_Overriding_Operation (N)
859 Xrefs.Table (Indx).Typ := 'P';
861 Xrefs.Table (Indx).Typ := Typ;
864 Xrefs.Table (Indx).Eun := Get_Source_Unit (Def);
865 Xrefs.Table (Indx).Lun := Get_Source_Unit (Ref);
866 Xrefs.Table (Indx).Ent := Ent;
867 Set_Has_Xref_Entry (Ent);
869 end Generate_Reference;
871 -----------------------------------
872 -- Generate_Reference_To_Formals --
873 -----------------------------------
875 procedure Generate_Reference_To_Formals (E : Entity_Id) is
879 if Is_Generic_Subprogram (E) then
880 Formal := First_Entity (E);
882 while Present (Formal)
883 and then not Is_Formal (Formal)
885 Next_Entity (Formal);
889 Formal := First_Formal (E);
892 while Present (Formal) loop
893 if Ekind (Formal) = E_In_Parameter then
895 if Nkind (Parameter_Type (Parent (Formal)))
896 = N_Access_Definition
898 Generate_Reference (E, Formal, '^', False);
900 Generate_Reference (E, Formal, '>', False);
903 elsif Ekind (Formal) = E_In_Out_Parameter then
904 Generate_Reference (E, Formal, '=', False);
907 Generate_Reference (E, Formal, '<', False);
910 Next_Formal (Formal);
912 end Generate_Reference_To_Formals;
914 -------------------------------------------
915 -- Generate_Reference_To_Generic_Formals --
916 -------------------------------------------
918 procedure Generate_Reference_To_Generic_Formals (E : Entity_Id) is
922 Formal := First_Entity (E);
923 while Present (Formal) loop
924 if Comes_From_Source (Formal) then
925 Generate_Reference (E, Formal, 'z', False);
928 Next_Entity (Formal);
930 end Generate_Reference_To_Generic_Formals;
936 procedure Initialize is
941 -----------------------
942 -- Output_References --
943 -----------------------
945 procedure Output_References is
947 procedure Get_Type_Reference
949 Tref : out Entity_Id;
950 Left : out Character;
951 Right : out Character);
952 -- Given an Entity_Id Ent, determines whether a type reference is
953 -- required. If so, Tref is set to the entity for the type reference
954 -- and Left and Right are set to the left/right brackets to be output
955 -- for the reference. If no type reference is required, then Tref is
956 -- set to Empty, and Left/Right are set to space.
958 procedure Output_Import_Export_Info (Ent : Entity_Id);
959 -- Output language and external name information for an interfaced
960 -- entity, using the format <language, external_name>,
962 ------------------------
963 -- Get_Type_Reference --
964 ------------------------
966 procedure Get_Type_Reference
968 Tref : out Entity_Id;
969 Left : out Character;
970 Right : out Character)
975 -- See if we have a type reference
984 -- Processing for types
986 if Is_Type (Tref) then
990 if Base_Type (Tref) = Tref then
992 -- If derived, then get first subtype
994 if Tref /= Etype (Tref) then
995 Tref := First_Subtype (Etype (Tref));
997 -- Set brackets for derived type, but don't override
998 -- pointer case since the fact that something is a
999 -- pointer is more important.
1006 -- If non-derived ptr, get directly designated type.
1007 -- If the type has a full view, all references are on the
1008 -- partial view, that is seen first.
1010 elsif Is_Access_Type (Tref) then
1011 Tref := Directly_Designated_Type (Tref);
1015 elsif Is_Private_Type (Tref)
1016 and then Present (Full_View (Tref))
1018 if Is_Access_Type (Full_View (Tref)) then
1019 Tref := Directly_Designated_Type (Full_View (Tref));
1023 -- If the full view is an array type, we also retrieve
1024 -- the corresponding component type, because the ali
1025 -- entry already indicates that this is an array.
1027 elsif Is_Array_Type (Full_View (Tref)) then
1028 Tref := Component_Type (Full_View (Tref));
1033 -- If non-derived array, get component type. Skip component
1034 -- type for case of String or Wide_String, saves worthwhile
1037 elsif Is_Array_Type (Tref)
1038 and then Tref /= Standard_String
1039 and then Tref /= Standard_Wide_String
1041 Tref := Component_Type (Tref);
1045 -- For other non-derived base types, nothing
1051 -- For a subtype, go to ancestor subtype
1054 Tref := Ancestor_Subtype (Tref);
1056 -- If no ancestor subtype, go to base type
1059 Tref := Base_Type (Sav);
1063 -- For objects, functions, enum literals, just get type from
1066 elsif Is_Object (Tref)
1067 or else Ekind (Tref) = E_Enumeration_Literal
1068 or else Ekind (Tref) = E_Function
1069 or else Ekind (Tref) = E_Operator
1071 Tref := Etype (Tref);
1073 -- For anything else, exit
1079 -- Exit if no type reference, or we are stuck in some loop trying
1080 -- to find the type reference, or if the type is standard void
1081 -- type (the latter is an implementation artifact that should not
1082 -- show up in the generated cross-references).
1086 or else Tref = Standard_Void_Type;
1088 -- If we have a usable type reference, return, otherwise keep
1089 -- looking for something useful (we are looking for something
1090 -- that either comes from source or standard)
1092 if Sloc (Tref) = Standard_Location
1093 or else Comes_From_Source (Tref)
1095 -- If the reference is a subtype created for a generic actual,
1096 -- go actual directly, the inner subtype is not user visible.
1098 if Nkind (Parent (Tref)) = N_Subtype_Declaration
1099 and then not Comes_From_Source (Parent (Tref))
1101 (Is_Wrapper_Package (Scope (Tref))
1102 or else Is_Generic_Instance (Scope (Tref)))
1104 Tref := First_Subtype (Base_Type (Tref));
1111 -- If we fall through the loop, no type reference
1116 end Get_Type_Reference;
1118 -------------------------------
1119 -- Output_Import_Export_Info --
1120 -------------------------------
1122 procedure Output_Import_Export_Info (Ent : Entity_Id) is
1123 Language_Name : Name_Id;
1124 Conv : constant Convention_Id := Convention (Ent);
1127 -- Generate language name from convention
1129 if Conv = Convention_C then
1130 Language_Name := Name_C;
1132 elsif Conv = Convention_CPP then
1133 Language_Name := Name_CPP;
1135 elsif Conv = Convention_Ada then
1136 Language_Name := Name_Ada;
1139 -- For the moment we ignore all other cases ???
1144 Write_Info_Char ('<');
1145 Get_Unqualified_Name_String (Language_Name);
1147 for J in 1 .. Name_Len loop
1148 Write_Info_Char (Name_Buffer (J));
1151 if Present (Interface_Name (Ent)) then
1152 Write_Info_Char (',');
1153 String_To_Name_Buffer (Strval (Interface_Name (Ent)));
1155 for J in 1 .. Name_Len loop
1156 Write_Info_Char (Name_Buffer (J));
1160 Write_Info_Char ('>');
1161 end Output_Import_Export_Info;
1163 -- Start of processing for Output_References
1166 if not Opt.Xref_Active then
1170 -- First we add references to the primitive operations of tagged
1171 -- types declared in the main unit.
1173 Handle_Prim_Ops : declare
1177 for J in 1 .. Xrefs.Last loop
1178 Ent := Xrefs.Table (J).Ent;
1181 and then Is_Tagged_Type (Ent)
1182 and then Ent = Base_Type (Ent)
1183 and then In_Extended_Main_Source_Unit (Ent)
1185 Generate_Prim_Op_References (Ent);
1188 end Handle_Prim_Ops;
1190 -- Before we go ahead and output the references we have a problem
1191 -- that needs dealing with. So far we have captured things that are
1192 -- definitely referenced by the main unit, or defined in the main
1193 -- unit. That's because we don't want to clutter up the ali file
1194 -- for this unit with definition lines for entities in other units
1195 -- that are not referenced.
1197 -- But there is a glitch. We may reference an entity in another unit,
1198 -- and it may have a type reference to an entity that is not directly
1199 -- referenced in the main unit, which may mean that there is no xref
1200 -- entry for this entity yet in the list of references.
1202 -- If we don't do something about this, we will end with an orphan type
1203 -- reference, i.e. it will point to an entity that does not appear
1204 -- within the generated references in the ali file. That is not good for
1205 -- tools using the xref information.
1207 -- To fix this, we go through the references adding definition entries
1208 -- for any unreferenced entities that can be referenced in a type
1209 -- reference. There is a recursion problem here, and that is dealt with
1210 -- by making sure that this traversal also traverses any entries that
1211 -- get added by the traversal.
1213 Handle_Orphan_Type_References : declare
1221 pragma Warnings (Off, L);
1222 pragma Warnings (Off, R);
1224 procedure New_Entry (E : Entity_Id);
1225 -- Make an additional entry into the Xref table for a type entity
1226 -- that is related to the current entity (parent, type ancestor,
1227 -- progenitor, etc.).
1233 procedure New_Entry (E : Entity_Id) is
1236 and then not Has_Xref_Entry (E)
1237 and then Sloc (E) > No_Location
1239 Xrefs.Increment_Last;
1241 Loc := Original_Location (Sloc (E));
1242 Xrefs.Table (Indx).Ent := E;
1243 Xrefs.Table (Indx).Loc := No_Location;
1244 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
1245 Xrefs.Table (Indx).Lun := No_Unit;
1246 Set_Has_Xref_Entry (E);
1250 -- Start of processing for Handle_Orphan_Type_References
1253 -- Note that this is not a for loop for a very good reason. The
1254 -- processing of items in the table can add new items to the table,
1255 -- and they must be processed as well.
1258 while J <= Xrefs.Last loop
1259 Ent := Xrefs.Table (J).Ent;
1260 Get_Type_Reference (Ent, Tref, L, R);
1263 and then not Has_Xref_Entry (Tref)
1264 and then Sloc (Tref) > No_Location
1268 if Is_Record_Type (Ent)
1269 and then Present (Interfaces (Ent))
1271 -- Add an entry for each one of the given interfaces
1272 -- implemented by type Ent.
1275 Elmt : Elmt_Id := First_Elmt (Interfaces (Ent));
1277 while Present (Elmt) loop
1278 New_Entry (Node (Elmt));
1285 -- Collect inherited primitive operations that may be declared in
1286 -- another unit and have no visible reference in the current one.
1289 and then Is_Tagged_Type (Ent)
1290 and then Is_Derived_Type (Ent)
1291 and then Ent = Base_Type (Ent)
1292 and then In_Extended_Main_Source_Unit (Ent)
1295 Op_List : constant Elist_Id := Primitive_Operations (Ent);
1299 function Parent_Op (E : Entity_Id) return Entity_Id;
1300 -- Find original operation, which may be inherited through
1301 -- several derivations.
1303 function Parent_Op (E : Entity_Id) return Entity_Id is
1304 Orig_Op : constant Entity_Id := Alias (E);
1307 if No (Orig_Op) then
1310 elsif not Comes_From_Source (E)
1311 and then not Has_Xref_Entry (Orig_Op)
1312 and then Comes_From_Source (Orig_Op)
1316 return Parent_Op (Orig_Op);
1321 Op := First_Elmt (Op_List);
1322 while Present (Op) loop
1323 Prim := Parent_Op (Node (Op));
1325 if Present (Prim) then
1326 Xrefs.Increment_Last;
1328 Loc := Original_Location (Sloc (Prim));
1329 Xrefs.Table (Indx).Ent := Prim;
1330 Xrefs.Table (Indx).Loc := No_Location;
1331 Xrefs.Table (Indx).Eun :=
1332 Get_Source_Unit (Sloc (Prim));
1333 Xrefs.Table (Indx).Lun := No_Unit;
1334 Set_Has_Xref_Entry (Prim);
1344 end Handle_Orphan_Type_References;
1346 -- Now we have all the references, including those for any embedded
1347 -- type references, so we can sort them, and output them.
1349 Output_Refs : declare
1351 Nrefs : Nat := Xrefs.Last;
1352 -- Number of references in table. This value may get reset (reduced)
1353 -- when we eliminate duplicate reference entries.
1355 Rnums : array (0 .. Nrefs) of Nat;
1356 -- This array contains numbers of references in the Xrefs table.
1357 -- This list is sorted in output order. The extra 0'th entry is
1358 -- convenient for the call to sort. When we sort the table, we
1359 -- move the entries in Rnums around, but we do not move the
1360 -- original table entries.
1362 Curxu : Unit_Number_Type;
1363 -- Current xref unit
1365 Curru : Unit_Number_Type;
1366 -- Current reference unit for one entity
1368 Cursrc : Source_Buffer_Ptr;
1369 -- Current xref unit source text
1374 Curnam : String (1 .. Name_Buffer'Length);
1376 -- Simple name and length of current entity
1378 Curdef : Source_Ptr;
1379 -- Original source location for current entity
1382 -- Current reference location
1385 -- Entity type character
1391 -- Renaming reference
1393 Trunit : Unit_Number_Type;
1394 -- Unit number for type reference
1396 function Lt (Op1, Op2 : Natural) return Boolean;
1397 -- Comparison function for Sort call
1399 function Name_Change (X : Entity_Id) return Boolean;
1400 -- Determines if entity X has a different simple name from Curent
1402 procedure Move (From : Natural; To : Natural);
1403 -- Move procedure for Sort call
1405 package Sorting is new GNAT.Heap_Sort_G (Move, Lt);
1411 function Lt (Op1, Op2 : Natural) return Boolean is
1412 T1 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op1)));
1413 T2 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op2)));
1416 -- First test: if entity is in different unit, sort by unit
1418 if T1.Eun /= T2.Eun then
1419 return Dependency_Num (T1.Eun) < Dependency_Num (T2.Eun);
1421 -- Second test: within same unit, sort by entity Sloc
1423 elsif T1.Def /= T2.Def then
1424 return T1.Def < T2.Def;
1426 -- Third test: sort definitions ahead of references
1428 elsif T1.Loc = No_Location then
1431 elsif T2.Loc = No_Location then
1434 -- Fourth test: for same entity, sort by reference location unit
1436 elsif T1.Lun /= T2.Lun then
1437 return Dependency_Num (T1.Lun) < Dependency_Num (T2.Lun);
1439 -- Fifth test: order of location within referencing unit
1441 elsif T1.Loc /= T2.Loc then
1442 return T1.Loc < T2.Loc;
1444 -- Finally, for two locations at the same address, we prefer
1445 -- the one that does NOT have the type 'r' so that a modification
1446 -- or extension takes preference, when there are more than one
1447 -- reference at the same location.
1450 return T2.Typ = 'r';
1458 procedure Move (From : Natural; To : Natural) is
1460 Rnums (Nat (To)) := Rnums (Nat (From));
1467 -- Why a string comparison here??? Why not compare Name_Id values???
1469 function Name_Change (X : Entity_Id) return Boolean is
1471 Get_Unqualified_Name_String (Chars (X));
1473 if Name_Len /= Curlen then
1476 return Name_Buffer (1 .. Curlen) /= Curnam (1 .. Curlen);
1480 -- Start of processing for Output_Refs
1483 -- Capture the definition Sloc values. We delay doing this till now,
1484 -- since at the time the reference or definition is made, private
1485 -- types may be swapped, and the Sloc value may be incorrect. We
1486 -- also set up the pointer vector for the sort.
1488 for J in 1 .. Nrefs loop
1490 Xrefs.Table (J).Def :=
1491 Original_Location (Sloc (Xrefs.Table (J).Ent));
1494 -- Sort the references
1496 Sorting.Sort (Integer (Nrefs));
1498 -- Eliminate duplicate entries
1501 NR : constant Nat := Nrefs;
1504 -- We need this test for NR because if we force ALI file
1505 -- generation in case of errors detected, it may be the case
1506 -- that Nrefs is 0, so we should not reset it here
1511 for J in 2 .. NR loop
1512 if Xrefs.Table (Rnums (J)) /=
1513 Xrefs.Table (Rnums (Nrefs))
1516 Rnums (Nrefs) := Rnums (J);
1522 -- Initialize loop through references
1526 Curdef := No_Location;
1528 Crloc := No_Location;
1530 -- Loop to output references
1532 for Refno in 1 .. Nrefs loop
1533 Output_One_Ref : declare
1539 pragma Warnings (Off, WC);
1540 pragma Warnings (Off, Err);
1542 XE : Xref_Entry renames Xrefs.Table (Rnums (Refno));
1543 -- The current entry to be accessed
1546 -- Used to index into source buffer to get entity name
1550 -- Used for {} or <> or () for type reference
1552 procedure Check_Type_Reference
1554 List_Interface : Boolean);
1555 -- Find whether there is a meaningful type reference for
1556 -- Ent, and display it accordingly. If List_Interface is
1557 -- true, then Ent is a progenitor interface of the current
1558 -- type entity being listed. In that case list it as is,
1559 -- without looking for a type reference for it.
1561 procedure Output_Instantiation_Refs (Loc : Source_Ptr);
1562 -- Recursive procedure to output instantiation references for
1563 -- the given source ptr in [file|line[...]] form. No output
1564 -- if the given location is not a generic template reference.
1566 procedure Output_Overridden_Op (Old_E : Entity_Id);
1567 -- For a subprogram that is overriding, display information
1568 -- about the inherited operation that it overrides.
1570 --------------------------
1571 -- Check_Type_Reference --
1572 --------------------------
1574 procedure Check_Type_Reference
1576 List_Interface : Boolean)
1579 if List_Interface then
1581 -- This is a progenitor interface of the type for which
1582 -- xref information is being generated.
1589 Get_Type_Reference (Ent, Tref, Left, Right);
1592 if Present (Tref) then
1594 -- Case of standard entity, output name
1596 if Sloc (Tref) = Standard_Location then
1597 Write_Info_Char (Left);
1598 Write_Info_Name (Chars (Tref));
1599 Write_Info_Char (Right);
1601 -- Case of source entity, output location
1604 Write_Info_Char (Left);
1605 Trunit := Get_Source_Unit (Sloc (Tref));
1607 if Trunit /= Curxu then
1608 Write_Info_Nat (Dependency_Num (Trunit));
1609 Write_Info_Char ('|');
1613 (Int (Get_Logical_Line_Number (Sloc (Tref))));
1621 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1624 and then Present (Full_View (Ent))
1626 Ent := Underlying_Type (Ent);
1628 if Present (Ent) then
1629 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1633 Write_Info_Char (Ctyp);
1637 (Int (Get_Column_Number (Sloc (Tref))));
1639 -- If the type comes from an instantiation, add the
1640 -- corresponding info.
1642 Output_Instantiation_Refs (Sloc (Tref));
1643 Write_Info_Char (Right);
1646 end Check_Type_Reference;
1648 -------------------------------
1649 -- Output_Instantiation_Refs --
1650 -------------------------------
1652 procedure Output_Instantiation_Refs (Loc : Source_Ptr) is
1653 Iloc : constant Source_Ptr := Instantiation_Location (Loc);
1654 Lun : Unit_Number_Type;
1655 Cu : constant Unit_Number_Type := Curru;
1658 -- Nothing to do if this is not an instantiation
1660 if Iloc = No_Location then
1664 -- Output instantiation reference
1666 Write_Info_Char ('[');
1667 Lun := Get_Source_Unit (Iloc);
1669 if Lun /= Curru then
1671 Write_Info_Nat (Dependency_Num (Curru));
1672 Write_Info_Char ('|');
1675 Write_Info_Nat (Int (Get_Logical_Line_Number (Iloc)));
1677 -- Recursive call to get nested instantiations
1679 Output_Instantiation_Refs (Iloc);
1681 -- Output final ] after call to get proper nesting
1683 Write_Info_Char (']');
1686 end Output_Instantiation_Refs;
1688 --------------------------
1689 -- Output_Overridden_Op --
1690 --------------------------
1692 procedure Output_Overridden_Op (Old_E : Entity_Id) is
1696 -- The overridden operation has an implicit declaration
1697 -- at the point of derivation. What we want to display
1698 -- is the original operation, which has the actual body
1699 -- (or abstract declaration) that is being overridden.
1700 -- The overridden operation is not always set, e.g. when
1701 -- it is a predefined operator.
1706 -- Follow alias chain if one is present
1708 elsif Present (Alias (Old_E)) then
1710 -- The subprogram may have been implicitly inherited
1711 -- through several levels of derivation, so find the
1712 -- ultimate (source) ancestor.
1714 Op := Ultimate_Alias (Old_E);
1716 -- Normal case of no alias present
1723 and then Sloc (Op) /= Standard_Location
1726 Loc : constant Source_Ptr := Sloc (Op);
1727 Par_Unit : constant Unit_Number_Type :=
1728 Get_Source_Unit (Loc);
1731 Write_Info_Char ('<');
1733 if Par_Unit /= Curxu then
1734 Write_Info_Nat (Dependency_Num (Par_Unit));
1735 Write_Info_Char ('|');
1738 Write_Info_Nat (Int (Get_Logical_Line_Number (Loc)));
1739 Write_Info_Char ('p');
1740 Write_Info_Nat (Int (Get_Column_Number (Loc)));
1741 Write_Info_Char ('>');
1744 end Output_Overridden_Op;
1746 -- Start of processing for Output_One_Ref
1750 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1752 -- Skip reference if it is the only reference to an entity,
1753 -- and it is an END line reference, and the entity is not in
1754 -- the current extended source. This prevents junk entries
1755 -- consisting only of packages with END lines, where no
1756 -- entity from the package is actually referenced.
1759 and then Ent /= Curent
1760 and then (Refno = Nrefs or else
1761 Ent /= Xrefs.Table (Rnums (Refno + 1)).Ent)
1763 not In_Extended_Main_Source_Unit (Ent)
1768 -- For private type, get full view type
1771 and then Present (Full_View (XE.Ent))
1773 Ent := Underlying_Type (Ent);
1775 if Present (Ent) then
1776 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1780 -- Special exception for Boolean
1782 if Ctyp = 'E' and then Is_Boolean_Type (Ent) then
1786 -- For variable reference, get corresponding type
1789 Ent := Etype (XE.Ent);
1790 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1792 -- If variable is private type, get full view type
1795 and then Present (Full_View (Etype (XE.Ent)))
1797 Ent := Underlying_Type (Etype (XE.Ent));
1799 if Present (Ent) then
1800 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1803 elsif Is_Generic_Type (Ent) then
1805 -- If the type of the entity is a generic private type,
1806 -- there is no usable full view, so retain the indication
1807 -- that this is an object.
1812 -- Special handling for access parameters and objects of
1813 -- an anonymous access type.
1815 if Ekind_In (Etype (XE.Ent),
1816 E_Anonymous_Access_Type,
1817 E_Anonymous_Access_Subprogram_Type,
1818 E_Anonymous_Access_Protected_Subprogram_Type)
1820 if Is_Formal (XE.Ent)
1821 or else Ekind_In (XE.Ent, E_Variable, E_Constant)
1826 -- Special handling for Boolean
1828 elsif Ctyp = 'e' and then Is_Boolean_Type (Ent) then
1833 -- Special handling for abstract types and operations
1835 if Is_Overloadable (XE.Ent)
1836 and then Is_Abstract_Subprogram (XE.Ent)
1839 Ctyp := 'x'; -- Abstract procedure
1841 elsif Ctyp = 'V' then
1842 Ctyp := 'y'; -- Abstract function
1845 elsif Is_Type (XE.Ent)
1846 and then Is_Abstract_Type (XE.Ent)
1848 if Is_Interface (XE.Ent) then
1851 elsif Ctyp = 'R' then
1852 Ctyp := 'H'; -- Abstract type
1856 -- Only output reference if interesting type of entity, and
1857 -- suppress self references, except for bodies that act as
1858 -- specs. Also suppress definitions of body formals (we only
1859 -- treat these as references, and the references were
1860 -- separately recorded).
1863 or else (XE.Loc = XE.Def
1866 or else not Is_Subprogram (XE.Ent)))
1867 or else (Is_Formal (XE.Ent)
1868 and then Present (Spec_Entity (XE.Ent)))
1873 -- Start new Xref section if new xref unit
1875 if XE.Eun /= Curxu then
1876 if Write_Info_Col > 1 then
1881 Cursrc := Source_Text (Source_Index (Curxu));
1883 Write_Info_Initiate ('X');
1884 Write_Info_Char (' ');
1885 Write_Info_Nat (Dependency_Num (XE.Eun));
1886 Write_Info_Char (' ');
1887 Write_Info_Name (Reference_Name (Source_Index (XE.Eun)));
1890 -- Start new Entity line if new entity. Note that we
1891 -- consider two entities the same if they have the same
1892 -- name and source location. This causes entities in
1893 -- instantiations to be treated as though they referred
1900 (Name_Change (XE.Ent) or else XE.Def /= Curdef))
1905 Get_Unqualified_Name_String (Chars (XE.Ent));
1907 Curnam (1 .. Curlen) := Name_Buffer (1 .. Curlen);
1909 if Write_Info_Col > 1 then
1913 -- Write column number information
1915 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Def)));
1916 Write_Info_Char (Ctyp);
1917 Write_Info_Nat (Int (Get_Column_Number (XE.Def)));
1919 -- Write level information
1921 Write_Level_Info : declare
1922 function Is_Visible_Generic_Entity
1923 (E : Entity_Id) return Boolean;
1924 -- Check whether E is declared in the visible part
1925 -- of a generic package. For source navigation
1926 -- purposes, treat this as a visible entity.
1928 function Is_Private_Record_Component
1929 (E : Entity_Id) return Boolean;
1930 -- Check whether E is a non-inherited component of a
1931 -- private extension. Even if the enclosing record is
1932 -- public, we want to treat the component as private
1933 -- for navigation purposes.
1935 ---------------------------------
1936 -- Is_Private_Record_Component --
1937 ---------------------------------
1939 function Is_Private_Record_Component
1940 (E : Entity_Id) return Boolean
1942 S : constant Entity_Id := Scope (E);
1945 Ekind (E) = E_Component
1946 and then Nkind (Declaration_Node (S)) =
1947 N_Private_Extension_Declaration
1948 and then Original_Record_Component (E) = E;
1949 end Is_Private_Record_Component;
1951 -------------------------------
1952 -- Is_Visible_Generic_Entity --
1953 -------------------------------
1955 function Is_Visible_Generic_Entity
1956 (E : Entity_Id) return Boolean
1961 -- The Present check here is an error defense
1963 if Present (Scope (E))
1964 and then Ekind (Scope (E)) /= E_Generic_Package
1970 while Present (Par) loop
1972 Nkind (Par) = N_Generic_Package_Declaration
1974 -- Entity is a generic formal
1979 Nkind (Parent (Par)) = N_Package_Specification
1982 Is_List_Member (Par)
1983 and then List_Containing (Par) =
1984 Visible_Declarations (Parent (Par));
1986 Par := Parent (Par);
1991 end Is_Visible_Generic_Entity;
1993 -- Start of processing for Write_Level_Info
1996 if Is_Hidden (Curent)
1997 or else Is_Private_Record_Component (Curent)
1999 Write_Info_Char (' ');
2003 or else Is_Visible_Generic_Entity (Curent)
2005 Write_Info_Char ('*');
2008 Write_Info_Char (' ');
2010 end Write_Level_Info;
2012 -- Output entity name. We use the occurrence from the
2013 -- actual source program at the definition point.
2015 P := Original_Location (Sloc (XE.Ent));
2017 -- Entity is character literal
2019 if Cursrc (P) = ''' then
2020 Write_Info_Char (Cursrc (P));
2021 Write_Info_Char (Cursrc (P + 1));
2022 Write_Info_Char (Cursrc (P + 2));
2024 -- Entity is operator symbol
2026 elsif Cursrc (P) = '"' or else Cursrc (P) = '%' then
2027 Write_Info_Char (Cursrc (P));
2032 Write_Info_Char (Cursrc (P2));
2033 exit when Cursrc (P2) = Cursrc (P);
2036 -- Entity is identifier
2040 if Is_Start_Of_Wide_Char (Cursrc, P) then
2041 Scan_Wide (Cursrc, P, WC, Err);
2042 elsif not Identifier_Char (Cursrc (P)) then
2049 -- Write out the identifier by copying the exact
2050 -- source characters used in its declaration. Note
2051 -- that this means wide characters will be in their
2052 -- original encoded form.
2055 Original_Location (Sloc (XE.Ent)) .. P - 1
2057 Write_Info_Char (Cursrc (J));
2061 -- See if we have a renaming reference
2063 if Is_Object (XE.Ent)
2064 and then Present (Renamed_Object (XE.Ent))
2066 Rref := Renamed_Object (XE.Ent);
2068 elsif Is_Overloadable (XE.Ent)
2069 and then Nkind (Parent (Declaration_Node (XE.Ent))) =
2070 N_Subprogram_Renaming_Declaration
2072 Rref := Name (Parent (Declaration_Node (XE.Ent)));
2074 elsif Ekind (XE.Ent) = E_Package
2075 and then Nkind (Declaration_Node (XE.Ent)) =
2076 N_Package_Renaming_Declaration
2078 Rref := Name (Declaration_Node (XE.Ent));
2084 if Present (Rref) then
2085 if Nkind (Rref) = N_Expanded_Name then
2086 Rref := Selector_Name (Rref);
2089 if Nkind (Rref) = N_Identifier
2090 or else Nkind (Rref) = N_Operator_Symbol
2094 -- For renamed array components, use the array name
2095 -- for the renamed entity, which reflect the fact that
2096 -- in general the whole array is aliased.
2098 elsif Nkind (Rref) = N_Indexed_Component then
2099 if Nkind (Prefix (Rref)) = N_Identifier then
2100 Rref := Prefix (Rref);
2101 elsif Nkind (Prefix (Rref)) = N_Expanded_Name then
2102 Rref := Selector_Name (Prefix (Rref));
2112 -- Write out renaming reference if we have one
2114 if Present (Rref) then
2115 Write_Info_Char ('=');
2117 (Int (Get_Logical_Line_Number (Sloc (Rref))));
2118 Write_Info_Char (':');
2120 (Int (Get_Column_Number (Sloc (Rref))));
2123 -- Indicate that the entity is in the unit of the current
2128 -- Write out information about generic parent, if entity
2131 if Is_Generic_Instance (XE.Ent) then
2133 Gen_Par : constant Entity_Id :=
2136 (Unit_Declaration_Node (XE.Ent)));
2137 Loc : constant Source_Ptr := Sloc (Gen_Par);
2138 Gen_U : constant Unit_Number_Type :=
2139 Get_Source_Unit (Loc);
2142 Write_Info_Char ('[');
2144 if Curru /= Gen_U then
2145 Write_Info_Nat (Dependency_Num (Gen_U));
2146 Write_Info_Char ('|');
2150 (Int (Get_Logical_Line_Number (Loc)));
2151 Write_Info_Char (']');
2155 -- See if we have a type reference and if so output
2157 Check_Type_Reference (XE.Ent, False);
2159 -- Additional information for types with progenitors
2161 if Is_Record_Type (XE.Ent)
2162 and then Present (Interfaces (XE.Ent))
2165 Elmt : Elmt_Id := First_Elmt (Interfaces (XE.Ent));
2167 while Present (Elmt) loop
2168 Check_Type_Reference (Node (Elmt), True);
2173 -- For array types, list index types as well.
2174 -- (This is not C, indices have distinct types).
2176 elsif Is_Array_Type (XE.Ent) then
2180 Indx := First_Index (XE.Ent);
2181 while Present (Indx) loop
2182 Check_Type_Reference
2183 (First_Subtype (Etype (Indx)), True);
2189 -- If the entity is an overriding operation, write info
2190 -- on operation that was overridden.
2192 if Is_Subprogram (XE.Ent)
2193 and then Is_Overriding_Operation (XE.Ent)
2195 Output_Overridden_Op (Overridden_Operation (XE.Ent));
2198 -- End of processing for entity output
2200 Crloc := No_Location;
2203 -- Output the reference
2205 if XE.Loc /= No_Location
2206 and then XE.Loc /= Crloc
2210 -- Start continuation if line full, else blank
2212 if Write_Info_Col > 72 then
2214 Write_Info_Initiate ('.');
2217 Write_Info_Char (' ');
2219 -- Output file number if changed
2221 if XE.Lun /= Curru then
2223 Write_Info_Nat (Dependency_Num (Curru));
2224 Write_Info_Char ('|');
2227 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Loc)));
2228 Write_Info_Char (XE.Typ);
2230 if Is_Overloadable (XE.Ent)
2231 and then Is_Imported (XE.Ent)
2232 and then XE.Typ = 'b'
2234 Output_Import_Export_Info (XE.Ent);
2237 Write_Info_Nat (Int (Get_Column_Number (XE.Loc)));
2239 Output_Instantiation_Refs (Sloc (XE.Ent));
2250 end Output_References;