1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1998-2009, 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;
220 -- Handle subtypes of synchronized types
222 if Ekind (Typ) = E_Protected_Subtype
223 or else Ekind (Typ) = E_Task_Subtype
225 Base_T := Etype (Typ);
230 -- References to primitive operations are only relevant for tagged types
232 if not Is_Tagged_Type (Base_T)
233 or else Is_Class_Wide_Type (Base_T)
238 -- Ada 2005 (AI-345): For synchronized types generate reference
239 -- to the wrapper that allow us to dispatch calls through their
240 -- implemented abstract interface types.
242 -- The check for Present here is to protect against previously
243 -- reported critical errors.
245 if Is_Concurrent_Type (Base_T)
246 and then Present (Corresponding_Record_Type (Base_T))
248 Prim_List := Primitive_Operations
249 (Corresponding_Record_Type (Base_T));
251 Prim_List := Primitive_Operations (Base_T);
254 if No (Prim_List) then
258 Prim := First_Elmt (Prim_List);
259 while Present (Prim) loop
261 -- If the operation is derived, get the original for cross-reference
262 -- reference purposes (it is the original for which we want the xref
263 -- and for which the comes_from_source test must be performed).
266 while Present (Alias (Ent)) loop
270 Generate_Reference (Typ, Ent, 'p', Set_Ref => False);
273 end Generate_Prim_Op_References;
275 ------------------------
276 -- Generate_Reference --
277 ------------------------
279 procedure Generate_Reference
282 Typ : Character := 'r';
283 Set_Ref : Boolean := True;
284 Force : Boolean := False)
294 -- Used for call to Find_Actual
297 -- If Formal is non-Empty, then its Ekind, otherwise E_Void
299 function Is_On_LHS (Node : Node_Id) return Boolean;
300 -- Used to check if a node is on the left hand side of an assignment.
301 -- The following cases are handled:
303 -- Variable Node is a direct descendant of left hand side of an
304 -- assignment statement.
306 -- Prefix Of an indexed or selected component that is present in
307 -- a subtree rooted by an assignment statement. There is
308 -- no restriction of nesting of components, thus cases
309 -- such as A.B (C).D are handled properly. However a prefix
310 -- of a dereference (either implicit or explicit) is never
311 -- considered as on a LHS.
313 -- Out param Same as above cases, but OUT parameter
315 function OK_To_Set_Referenced return Boolean;
316 -- Returns True if the Referenced flag can be set. There are a few
317 -- exceptions where we do not want to set this flag, see body for
318 -- details of these exceptional cases.
324 -- ??? There are several routines here and there that perform a similar
325 -- (but subtly different) computation, which should be factored:
327 -- Sem_Util.May_Be_Lvalue
328 -- Sem_Util.Known_To_Be_Assigned
329 -- Exp_Ch2.Expand_Entry_Parameter.In_Assignment_Context
330 -- Exp_Smem.Is_Out_Actual
332 function Is_On_LHS (Node : Node_Id) return Boolean is
338 -- Only identifiers are considered, is this necessary???
340 if Nkind (Node) /= N_Identifier then
344 -- Immediate return if appeared as OUT parameter
346 if Kind = E_Out_Parameter then
350 -- Search for assignment statement subtree root
357 if K = N_Assignment_Statement then
360 -- Check whether the parent is a component and the current node is
361 -- its prefix, but return False if the current node has an access
362 -- type, as in that case the selected or indexed component is an
363 -- implicit dereference, and the LHS is the designated object, not
364 -- the access object.
366 -- ??? case of a slice assignment?
368 -- ??? Note that in some cases this is called too early
369 -- (see comments in Sem_Ch8.Find_Direct_Name), at a point where
370 -- the tree is not fully typed yet. In that case we may lack
371 -- an Etype for N, and we must disable the check for an implicit
372 -- dereference. If the dereference is on an LHS, this causes a
375 elsif (K = N_Selected_Component or else K = N_Indexed_Component)
376 and then Prefix (P) = N
377 and then not (Present (Etype (N))
379 Is_Access_Type (Etype (N)))
383 -- All other cases, definitely not on left side
391 ---------------------------
392 -- OK_To_Set_Referenced --
393 ---------------------------
395 function OK_To_Set_Referenced return Boolean is
399 -- A reference from a pragma Unreferenced or pragma Unmodified or
400 -- pragma Warnings does not cause the Referenced flag to be set.
401 -- This avoids silly warnings about things being referenced and
402 -- not assigned when the only reference is from the pragma.
404 if Nkind (N) = N_Identifier then
407 if Nkind (P) = N_Pragma_Argument_Association then
410 if Nkind (P) = N_Pragma then
411 if Pragma_Name (P) = Name_Warnings
413 Pragma_Name (P) = Name_Unmodified
415 Pragma_Name (P) = Name_Unreferenced
424 end OK_To_Set_Referenced;
426 -- Start of processing for Generate_Reference
429 pragma Assert (Nkind (E) in N_Entity);
430 Find_Actual (N, Formal, Call);
432 if Present (Formal) then
433 Kind := Ekind (Formal);
438 -- Check for obsolescent reference to package ASCII. GNAT treats this
439 -- element of annex J specially since in practice, programs make a lot
440 -- of use of this feature, so we don't include it in the set of features
441 -- diagnosed when Warn_On_Obsolescent_Features mode is set. However we
442 -- are required to note it as a violation of the RM defined restriction.
444 if E = Standard_ASCII then
445 Check_Restriction (No_Obsolescent_Features, N);
448 -- Check for reference to entity marked with Is_Obsolescent
450 -- Note that we always allow obsolescent references in the compiler
451 -- itself and the run time, since we assume that we know what we are
452 -- doing in such cases. For example the calls in Ada.Characters.Handling
453 -- to its own obsolescent subprograms are just fine.
455 -- In any case we do not generate warnings within the extended source
456 -- unit of the entity in question, since we assume the source unit
457 -- itself knows what is going on (and for sure we do not want silly
458 -- warnings, e.g. on the end line of an obsolescent procedure body).
460 if Is_Obsolescent (E)
461 and then not GNAT_Mode
462 and then not In_Extended_Main_Source_Unit (E)
464 Check_Restriction (No_Obsolescent_Features, N);
466 if Warn_On_Obsolescent_Feature then
467 Output_Obsolescent_Entity_Warnings (N, E);
471 -- Warn if reference to Ada 2005 entity not in Ada 2005 mode. We only
472 -- detect real explicit references (modifications and references).
474 if Comes_From_Source (N)
475 and then Is_Ada_2005_Only (E)
476 and then Ada_Version < Ada_05
477 and then Warn_On_Ada_2005_Compatibility
478 and then (Typ = 'm' or else Typ = 'r')
480 Error_Msg_NE ("& is only defined in Ada 2005?", N, E);
483 -- Never collect references if not in main source unit. However, we omit
484 -- this test if Typ is 'e' or 'k', since these entries are structural,
485 -- and it is useful to have them in units that reference packages as
486 -- well as units that define packages. We also omit the test for the
487 -- case of 'p' since we want to include inherited primitive operations
488 -- from other packages.
490 -- We also omit this test is this is a body reference for a subprogram
491 -- instantiation. In this case the reference is to the generic body,
492 -- which clearly need not be in the main unit containing the instance.
493 -- For the same reason we accept an implicit reference generated for
494 -- a default in an instance.
496 if not In_Extended_Main_Source_Unit (N) then
501 or else (Typ = 'b' and then Is_Generic_Instance (E))
509 -- For reference type p, the entity must be in main source unit
511 if Typ = 'p' and then not In_Extended_Main_Source_Unit (E) then
515 -- Unless the reference is forced, we ignore references where the
516 -- reference itself does not come from source.
518 if not Force and then not Comes_From_Source (N) then
522 -- Deal with setting entity as referenced, unless suppressed. Note that
523 -- we still do Set_Referenced on entities that do not come from source.
524 -- This situation arises when we have a source reference to a derived
525 -- operation, where the derived operation itself does not come from
526 -- source, but we still want to mark it as referenced, since we really
527 -- are referencing an entity in the corresponding package (this avoids
528 -- wrong complaints that the package contains no referenced entities).
532 -- Assignable object appearing on left side of assignment or as
536 and then Is_On_LHS (N)
537 and then Ekind (E) /= E_In_Out_Parameter
539 -- For objects that are renamings, just set as simply referenced
540 -- we do not try to do assignment type tracking in this case.
542 if Present (Renamed_Object (E)) then
545 -- Out parameter case
547 elsif Kind = E_Out_Parameter then
549 -- If warning mode for all out parameters is set, or this is
550 -- the only warning parameter, then we want to mark this for
551 -- later warning logic by setting Referenced_As_Out_Parameter
553 if Warn_On_Modified_As_Out_Parameter (Formal) then
554 Set_Referenced_As_Out_Parameter (E, True);
555 Set_Referenced_As_LHS (E, False);
557 -- For OUT parameter not covered by the above cases, we simply
558 -- regard it as a normal reference (in this case we do not
559 -- want any of the warning machinery for out parameters).
565 -- For the left hand of an assignment case, we do nothing here.
566 -- The processing for Analyze_Assignment_Statement will set the
567 -- Referenced_As_LHS flag.
573 -- Check for a reference in a pragma that should not count as a
574 -- making the variable referenced for warning purposes.
576 elsif Is_Non_Significant_Pragma_Reference (N) then
579 -- A reference in an attribute definition clause does not count as a
580 -- reference except for the case of Address. The reason that 'Address
581 -- is an exception is that it creates an alias through which the
582 -- variable may be referenced.
584 elsif Nkind (Parent (N)) = N_Attribute_Definition_Clause
585 and then Chars (Parent (N)) /= Name_Address
586 and then N = Name (Parent (N))
590 -- Constant completion does not count as a reference
593 and then Ekind (E) = E_Constant
597 -- Record representation clause does not count as a reference
599 elsif Nkind (N) = N_Identifier
600 and then Nkind (Parent (N)) = N_Record_Representation_Clause
604 -- Discriminants do not need to produce a reference to record type
607 and then Nkind (Parent (N)) = N_Discriminant_Specification
614 -- Special processing for IN OUT parameters, where we have an
615 -- implicit assignment to a simple variable.
617 if Kind = E_In_Out_Parameter
618 and then Is_Assignable (E)
620 -- For sure this counts as a normal read reference
623 Set_Last_Assignment (E, Empty);
625 -- We count it as being referenced as an out parameter if the
626 -- option is set to warn on all out parameters, except that we
627 -- have a special exclusion for an intrinsic subprogram, which
628 -- is most likely an instantiation of Unchecked_Deallocation
629 -- which we do not want to consider as an assignment since it
630 -- generates false positives. We also exclude the case of an
631 -- IN OUT parameter if the name of the procedure is Free,
632 -- since we suspect similar semantics.
634 if Warn_On_All_Unread_Out_Parameters
635 and then Is_Entity_Name (Name (Call))
636 and then not Is_Intrinsic_Subprogram (Entity (Name (Call)))
637 and then Chars (Name (Call)) /= Name_Free
639 Set_Referenced_As_Out_Parameter (E, True);
640 Set_Referenced_As_LHS (E, False);
643 -- Don't count a recursive reference within a subprogram as a
644 -- reference (that allows detection of a recursive subprogram
645 -- whose only references are recursive calls as unreferenced).
647 elsif Is_Subprogram (E)
648 and then E = Nearest_Dynamic_Scope (Current_Scope)
652 -- Any other occurrence counts as referencing the entity
654 elsif OK_To_Set_Referenced then
657 -- If variable, this is an OK reference after an assignment
658 -- so we can clear the Last_Assignment indication.
660 if Is_Assignable (E) then
661 Set_Last_Assignment (E, Empty);
666 -- Check for pragma Unreferenced given and reference is within
667 -- this source unit (occasion for possible warning to be issued).
669 if Has_Pragma_Unreferenced (E)
670 and then In_Same_Extended_Unit (E, N)
672 -- A reference as a named parameter in a call does not count
673 -- as a violation of pragma Unreferenced for this purpose...
675 if Nkind (N) = N_Identifier
676 and then Nkind (Parent (N)) = N_Parameter_Association
677 and then Selector_Name (Parent (N)) = N
681 -- ... Neither does a reference to a variable on the left side
684 elsif Is_On_LHS (N) then
687 -- For entry formals, we want to place the warning message on the
688 -- corresponding entity in the accept statement. The current scope
689 -- is the body of the accept, so we find the formal whose name
690 -- matches that of the entry formal (there is no link between the
691 -- two entities, and the one in the accept statement is only used
692 -- for conformance checking).
694 elsif Ekind (Scope (E)) = E_Entry then
699 BE := First_Entity (Current_Scope);
700 while Present (BE) loop
701 if Chars (BE) = Chars (E) then
703 ("?pragma Unreferenced given for&!", N, BE);
711 -- Here we issue the warning, since this is a real reference
714 Error_Msg_NE ("?pragma Unreferenced given for&!", N, E);
718 -- If this is a subprogram instance, mark as well the internal
719 -- subprogram in the wrapper package, which may be a visible
722 if Is_Overloadable (E)
723 and then Is_Generic_Instance (E)
724 and then Present (Alias (E))
726 Set_Referenced (Alias (E));
730 -- Generate reference if all conditions are met:
733 -- Cross referencing must be active
737 -- The entity must be one for which we collect references
739 and then Xref_Entity_Letters (Ekind (E)) /= ' '
741 -- Both Sloc values must be set to something sensible
743 and then Sloc (E) > No_Location
744 and then Sloc (N) > No_Location
746 -- We ignore references from within an instance, except for default
747 -- subprograms, for which we generate an implicit reference.
750 (Instantiation_Location (Sloc (N)) = No_Location or else Typ = 'i')
752 -- Ignore dummy references
756 if Nkind (N) = N_Identifier
758 Nkind (N) = N_Defining_Identifier
762 Nkind (N) = N_Defining_Operator_Symbol
764 Nkind (N) = N_Operator_Symbol
766 (Nkind (N) = N_Character_Literal
767 and then Sloc (Entity (N)) /= Standard_Location)
769 Nkind (N) = N_Defining_Character_Literal
773 elsif Nkind (N) = N_Expanded_Name
775 Nkind (N) = N_Selected_Component
777 Nod := Selector_Name (N);
783 -- Normal case of source entity comes from source
785 if Comes_From_Source (E) then
788 -- Entity does not come from source, but is a derived subprogram and
789 -- the derived subprogram comes from source (after one or more
790 -- derivations) in which case the reference is to parent subprogram.
792 elsif Is_Overloadable (E)
793 and then Present (Alias (E))
796 while not Comes_From_Source (Ent) loop
797 if No (Alias (Ent)) then
804 -- The internally created defining entity for a child subprogram
805 -- that has no previous spec has valid references.
807 elsif Is_Overloadable (E)
808 and then Is_Child_Unit (E)
812 -- Record components of discriminated subtypes or derived types must
813 -- be treated as references to the original component.
815 elsif Ekind (E) = E_Component
816 and then Comes_From_Source (Original_Record_Component (E))
818 Ent := Original_Record_Component (E);
820 -- If this is an expanded reference to a discriminant, recover the
821 -- original discriminant, which gets the reference.
823 elsif Ekind (E) = E_In_Parameter
824 and then Present (Discriminal_Link (E))
826 Ent := Discriminal_Link (E);
827 Set_Referenced (Ent);
829 -- Ignore reference to any other entity that is not from source
835 -- Record reference to entity
837 Ref := Original_Location (Sloc (Nod));
838 Def := Original_Location (Sloc (Ent));
840 Xrefs.Increment_Last;
843 Xrefs.Table (Indx).Loc := Ref;
845 -- Overriding operations are marked with 'P'
848 and then Is_Subprogram (N)
849 and then Is_Overriding_Operation (N)
851 Xrefs.Table (Indx).Typ := 'P';
853 Xrefs.Table (Indx).Typ := Typ;
856 Xrefs.Table (Indx).Eun := Get_Source_Unit (Def);
857 Xrefs.Table (Indx).Lun := Get_Source_Unit (Ref);
858 Xrefs.Table (Indx).Ent := Ent;
859 Set_Has_Xref_Entry (Ent);
861 end Generate_Reference;
863 -----------------------------------
864 -- Generate_Reference_To_Formals --
865 -----------------------------------
867 procedure Generate_Reference_To_Formals (E : Entity_Id) is
871 if Is_Generic_Subprogram (E) then
872 Formal := First_Entity (E);
874 while Present (Formal)
875 and then not Is_Formal (Formal)
877 Next_Entity (Formal);
881 Formal := First_Formal (E);
884 while Present (Formal) loop
885 if Ekind (Formal) = E_In_Parameter then
887 if Nkind (Parameter_Type (Parent (Formal)))
888 = N_Access_Definition
890 Generate_Reference (E, Formal, '^', False);
892 Generate_Reference (E, Formal, '>', False);
895 elsif Ekind (Formal) = E_In_Out_Parameter then
896 Generate_Reference (E, Formal, '=', False);
899 Generate_Reference (E, Formal, '<', False);
902 Next_Formal (Formal);
904 end Generate_Reference_To_Formals;
906 -------------------------------------------
907 -- Generate_Reference_To_Generic_Formals --
908 -------------------------------------------
910 procedure Generate_Reference_To_Generic_Formals (E : Entity_Id) is
914 Formal := First_Entity (E);
915 while Present (Formal) loop
916 if Comes_From_Source (Formal) then
917 Generate_Reference (E, Formal, 'z', False);
920 Next_Entity (Formal);
922 end Generate_Reference_To_Generic_Formals;
928 procedure Initialize is
933 -----------------------
934 -- Output_References --
935 -----------------------
937 procedure Output_References is
939 procedure Get_Type_Reference
941 Tref : out Entity_Id;
942 Left : out Character;
943 Right : out Character);
944 -- Given an Entity_Id Ent, determines whether a type reference is
945 -- required. If so, Tref is set to the entity for the type reference
946 -- and Left and Right are set to the left/right brackets to be output
947 -- for the reference. If no type reference is required, then Tref is
948 -- set to Empty, and Left/Right are set to space.
950 procedure Output_Import_Export_Info (Ent : Entity_Id);
951 -- Output language and external name information for an interfaced
952 -- entity, using the format <language, external_name>,
954 ------------------------
955 -- Get_Type_Reference --
956 ------------------------
958 procedure Get_Type_Reference
960 Tref : out Entity_Id;
961 Left : out Character;
962 Right : out Character)
967 -- See if we have a type reference
976 -- Processing for types
978 if Is_Type (Tref) then
982 if Base_Type (Tref) = Tref then
984 -- If derived, then get first subtype
986 if Tref /= Etype (Tref) then
987 Tref := First_Subtype (Etype (Tref));
989 -- Set brackets for derived type, but don't override
990 -- pointer case since the fact that something is a
991 -- pointer is more important.
998 -- If non-derived ptr, get directly designated type.
999 -- If the type has a full view, all references are on the
1000 -- partial view, that is seen first.
1002 elsif Is_Access_Type (Tref) then
1003 Tref := Directly_Designated_Type (Tref);
1007 elsif Is_Private_Type (Tref)
1008 and then Present (Full_View (Tref))
1010 if Is_Access_Type (Full_View (Tref)) then
1011 Tref := Directly_Designated_Type (Full_View (Tref));
1015 -- If the full view is an array type, we also retrieve
1016 -- the corresponding component type, because the ali
1017 -- entry already indicates that this is an array.
1019 elsif Is_Array_Type (Full_View (Tref)) then
1020 Tref := Component_Type (Full_View (Tref));
1025 -- If non-derived array, get component type. Skip component
1026 -- type for case of String or Wide_String, saves worthwhile
1029 elsif Is_Array_Type (Tref)
1030 and then Tref /= Standard_String
1031 and then Tref /= Standard_Wide_String
1033 Tref := Component_Type (Tref);
1037 -- For other non-derived base types, nothing
1043 -- For a subtype, go to ancestor subtype
1046 Tref := Ancestor_Subtype (Tref);
1048 -- If no ancestor subtype, go to base type
1051 Tref := Base_Type (Sav);
1055 -- For objects, functions, enum literals, just get type from
1058 elsif Is_Object (Tref)
1059 or else Ekind (Tref) = E_Enumeration_Literal
1060 or else Ekind (Tref) = E_Function
1061 or else Ekind (Tref) = E_Operator
1063 Tref := Etype (Tref);
1065 -- For anything else, exit
1071 -- Exit if no type reference, or we are stuck in some loop trying
1072 -- to find the type reference, or if the type is standard void
1073 -- type (the latter is an implementation artifact that should not
1074 -- show up in the generated cross-references).
1078 or else Tref = Standard_Void_Type;
1080 -- If we have a usable type reference, return, otherwise keep
1081 -- looking for something useful (we are looking for something
1082 -- that either comes from source or standard)
1084 if Sloc (Tref) = Standard_Location
1085 or else Comes_From_Source (Tref)
1087 -- If the reference is a subtype created for a generic actual,
1088 -- go actual directly, the inner subtype is not user visible.
1090 if Nkind (Parent (Tref)) = N_Subtype_Declaration
1091 and then not Comes_From_Source (Parent (Tref))
1093 (Is_Wrapper_Package (Scope (Tref))
1094 or else Is_Generic_Instance (Scope (Tref)))
1096 Tref := First_Subtype (Base_Type (Tref));
1103 -- If we fall through the loop, no type reference
1108 end Get_Type_Reference;
1110 -------------------------------
1111 -- Output_Import_Export_Info --
1112 -------------------------------
1114 procedure Output_Import_Export_Info (Ent : Entity_Id) is
1115 Language_Name : Name_Id;
1116 Conv : constant Convention_Id := Convention (Ent);
1119 -- Generate language name from convention
1121 if Conv = Convention_C then
1122 Language_Name := Name_C;
1124 elsif Conv = Convention_CPP then
1125 Language_Name := Name_CPP;
1127 elsif Conv = Convention_Ada then
1128 Language_Name := Name_Ada;
1131 -- For the moment we ignore all other cases ???
1136 Write_Info_Char ('<');
1137 Get_Unqualified_Name_String (Language_Name);
1139 for J in 1 .. Name_Len loop
1140 Write_Info_Char (Name_Buffer (J));
1143 if Present (Interface_Name (Ent)) then
1144 Write_Info_Char (',');
1145 String_To_Name_Buffer (Strval (Interface_Name (Ent)));
1147 for J in 1 .. Name_Len loop
1148 Write_Info_Char (Name_Buffer (J));
1152 Write_Info_Char ('>');
1153 end Output_Import_Export_Info;
1155 -- Start of processing for Output_References
1158 if not Opt.Xref_Active then
1162 -- First we add references to the primitive operations of tagged
1163 -- types declared in the main unit.
1165 Handle_Prim_Ops : declare
1169 for J in 1 .. Xrefs.Last loop
1170 Ent := Xrefs.Table (J).Ent;
1173 and then Is_Tagged_Type (Ent)
1174 and then Ent = Base_Type (Ent)
1175 and then In_Extended_Main_Source_Unit (Ent)
1177 Generate_Prim_Op_References (Ent);
1180 end Handle_Prim_Ops;
1182 -- Before we go ahead and output the references we have a problem
1183 -- that needs dealing with. So far we have captured things that are
1184 -- definitely referenced by the main unit, or defined in the main
1185 -- unit. That's because we don't want to clutter up the ali file
1186 -- for this unit with definition lines for entities in other units
1187 -- that are not referenced.
1189 -- But there is a glitch. We may reference an entity in another unit,
1190 -- and it may have a type reference to an entity that is not directly
1191 -- referenced in the main unit, which may mean that there is no xref
1192 -- entry for this entity yet in the list of references.
1194 -- If we don't do something about this, we will end with an orphan type
1195 -- reference, i.e. it will point to an entity that does not appear
1196 -- within the generated references in the ali file. That is not good for
1197 -- tools using the xref information.
1199 -- To fix this, we go through the references adding definition entries
1200 -- for any unreferenced entities that can be referenced in a type
1201 -- reference. There is a recursion problem here, and that is dealt with
1202 -- by making sure that this traversal also traverses any entries that
1203 -- get added by the traversal.
1205 Handle_Orphan_Type_References : declare
1213 pragma Warnings (Off, L);
1214 pragma Warnings (Off, R);
1216 procedure New_Entry (E : Entity_Id);
1217 -- Make an additional entry into the Xref table for a type entity
1218 -- that is related to the current entity (parent, type ancestor,
1219 -- progenitor, etc.).
1225 procedure New_Entry (E : Entity_Id) is
1228 and then not Has_Xref_Entry (E)
1229 and then Sloc (E) > No_Location
1231 Xrefs.Increment_Last;
1233 Loc := Original_Location (Sloc (E));
1234 Xrefs.Table (Indx).Ent := E;
1235 Xrefs.Table (Indx).Loc := No_Location;
1236 Xrefs.Table (Indx).Eun := Get_Source_Unit (Loc);
1237 Xrefs.Table (Indx).Lun := No_Unit;
1238 Set_Has_Xref_Entry (E);
1242 -- Start of processing for Handle_Orphan_Type_References
1245 -- Note that this is not a for loop for a very good reason. The
1246 -- processing of items in the table can add new items to the table,
1247 -- and they must be processed as well.
1250 while J <= Xrefs.Last loop
1251 Ent := Xrefs.Table (J).Ent;
1252 Get_Type_Reference (Ent, Tref, L, R);
1255 and then not Has_Xref_Entry (Tref)
1256 and then Sloc (Tref) > No_Location
1260 if Is_Record_Type (Ent)
1261 and then Present (Interfaces (Ent))
1263 -- Add an entry for each one of the given interfaces
1264 -- implemented by type Ent.
1267 Elmt : Elmt_Id := First_Elmt (Interfaces (Ent));
1269 while Present (Elmt) loop
1270 New_Entry (Node (Elmt));
1277 -- Collect inherited primitive operations that may be declared in
1278 -- another unit and have no visible reference in the current one.
1281 and then Is_Tagged_Type (Ent)
1282 and then Is_Derived_Type (Ent)
1283 and then Ent = Base_Type (Ent)
1284 and then In_Extended_Main_Source_Unit (Ent)
1287 Op_List : constant Elist_Id := Primitive_Operations (Ent);
1291 function Parent_Op (E : Entity_Id) return Entity_Id;
1292 -- Find original operation, which may be inherited through
1293 -- several derivations.
1295 function Parent_Op (E : Entity_Id) return Entity_Id is
1296 Orig_Op : constant Entity_Id := Alias (E);
1299 if No (Orig_Op) then
1302 elsif not Comes_From_Source (E)
1303 and then not Has_Xref_Entry (Orig_Op)
1304 and then Comes_From_Source (Orig_Op)
1308 return Parent_Op (Orig_Op);
1313 Op := First_Elmt (Op_List);
1314 while Present (Op) loop
1315 Prim := Parent_Op (Node (Op));
1317 if Present (Prim) then
1318 Xrefs.Increment_Last;
1320 Loc := Original_Location (Sloc (Prim));
1321 Xrefs.Table (Indx).Ent := Prim;
1322 Xrefs.Table (Indx).Loc := No_Location;
1323 Xrefs.Table (Indx).Eun :=
1324 Get_Source_Unit (Sloc (Prim));
1325 Xrefs.Table (Indx).Lun := No_Unit;
1326 Set_Has_Xref_Entry (Prim);
1336 end Handle_Orphan_Type_References;
1338 -- Now we have all the references, including those for any embedded
1339 -- type references, so we can sort them, and output them.
1341 Output_Refs : declare
1343 Nrefs : Nat := Xrefs.Last;
1344 -- Number of references in table. This value may get reset (reduced)
1345 -- when we eliminate duplicate reference entries.
1347 Rnums : array (0 .. Nrefs) of Nat;
1348 -- This array contains numbers of references in the Xrefs table.
1349 -- This list is sorted in output order. The extra 0'th entry is
1350 -- convenient for the call to sort. When we sort the table, we
1351 -- move the entries in Rnums around, but we do not move the
1352 -- original table entries.
1354 Curxu : Unit_Number_Type;
1355 -- Current xref unit
1357 Curru : Unit_Number_Type;
1358 -- Current reference unit for one entity
1360 Cursrc : Source_Buffer_Ptr;
1361 -- Current xref unit source text
1366 Curnam : String (1 .. Name_Buffer'Length);
1368 -- Simple name and length of current entity
1370 Curdef : Source_Ptr;
1371 -- Original source location for current entity
1374 -- Current reference location
1377 -- Entity type character
1383 -- Renaming reference
1385 Trunit : Unit_Number_Type;
1386 -- Unit number for type reference
1388 function Lt (Op1, Op2 : Natural) return Boolean;
1389 -- Comparison function for Sort call
1391 function Name_Change (X : Entity_Id) return Boolean;
1392 -- Determines if entity X has a different simple name from Curent
1394 procedure Move (From : Natural; To : Natural);
1395 -- Move procedure for Sort call
1397 package Sorting is new GNAT.Heap_Sort_G (Move, Lt);
1403 function Lt (Op1, Op2 : Natural) return Boolean is
1404 T1 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op1)));
1405 T2 : Xref_Entry renames Xrefs.Table (Rnums (Nat (Op2)));
1408 -- First test: if entity is in different unit, sort by unit
1410 if T1.Eun /= T2.Eun then
1411 return Dependency_Num (T1.Eun) < Dependency_Num (T2.Eun);
1413 -- Second test: within same unit, sort by entity Sloc
1415 elsif T1.Def /= T2.Def then
1416 return T1.Def < T2.Def;
1418 -- Third test: sort definitions ahead of references
1420 elsif T1.Loc = No_Location then
1423 elsif T2.Loc = No_Location then
1426 -- Fourth test: for same entity, sort by reference location unit
1428 elsif T1.Lun /= T2.Lun then
1429 return Dependency_Num (T1.Lun) < Dependency_Num (T2.Lun);
1431 -- Fifth test: order of location within referencing unit
1433 elsif T1.Loc /= T2.Loc then
1434 return T1.Loc < T2.Loc;
1436 -- Finally, for two locations at the same address, we prefer
1437 -- the one that does NOT have the type 'r' so that a modification
1438 -- or extension takes preference, when there are more than one
1439 -- reference at the same location.
1442 return T2.Typ = 'r';
1450 procedure Move (From : Natural; To : Natural) is
1452 Rnums (Nat (To)) := Rnums (Nat (From));
1459 -- Why a string comparison here??? Why not compare Name_Id values???
1461 function Name_Change (X : Entity_Id) return Boolean is
1463 Get_Unqualified_Name_String (Chars (X));
1465 if Name_Len /= Curlen then
1468 return Name_Buffer (1 .. Curlen) /= Curnam (1 .. Curlen);
1472 -- Start of processing for Output_Refs
1475 -- Capture the definition Sloc values. We delay doing this till now,
1476 -- since at the time the reference or definition is made, private
1477 -- types may be swapped, and the Sloc value may be incorrect. We
1478 -- also set up the pointer vector for the sort.
1480 for J in 1 .. Nrefs loop
1482 Xrefs.Table (J).Def :=
1483 Original_Location (Sloc (Xrefs.Table (J).Ent));
1486 -- Sort the references
1488 Sorting.Sort (Integer (Nrefs));
1490 -- Eliminate duplicate entries
1493 NR : constant Nat := Nrefs;
1496 -- We need this test for NR because if we force ALI file
1497 -- generation in case of errors detected, it may be the case
1498 -- that Nrefs is 0, so we should not reset it here
1503 for J in 2 .. NR loop
1504 if Xrefs.Table (Rnums (J)) /=
1505 Xrefs.Table (Rnums (Nrefs))
1508 Rnums (Nrefs) := Rnums (J);
1514 -- Initialize loop through references
1518 Curdef := No_Location;
1520 Crloc := No_Location;
1522 -- Loop to output references
1524 for Refno in 1 .. Nrefs loop
1525 Output_One_Ref : declare
1531 pragma Warnings (Off, WC);
1532 pragma Warnings (Off, Err);
1534 XE : Xref_Entry renames Xrefs.Table (Rnums (Refno));
1535 -- The current entry to be accessed
1538 -- Used to index into source buffer to get entity name
1542 -- Used for {} or <> or () for type reference
1544 procedure Check_Type_Reference
1546 List_Interface : Boolean);
1547 -- Find whether there is a meaningful type reference for
1548 -- Ent, and display it accordingly. If List_Interface is
1549 -- true, then Ent is a progenitor interface of the current
1550 -- type entity being listed. In that case list it as is,
1551 -- without looking for a type reference for it.
1553 procedure Output_Instantiation_Refs (Loc : Source_Ptr);
1554 -- Recursive procedure to output instantiation references for
1555 -- the given source ptr in [file|line[...]] form. No output
1556 -- if the given location is not a generic template reference.
1558 procedure Output_Overridden_Op (Old_E : Entity_Id);
1559 -- For a subprogram that is overriding, display information
1560 -- about the inherited operation that it overrides.
1562 --------------------------
1563 -- Check_Type_Reference --
1564 --------------------------
1566 procedure Check_Type_Reference
1568 List_Interface : Boolean)
1571 if List_Interface then
1573 -- This is a progenitor interface of the type for which
1574 -- xref information is being generated.
1581 Get_Type_Reference (Ent, Tref, Left, Right);
1584 if Present (Tref) then
1586 -- Case of standard entity, output name
1588 if Sloc (Tref) = Standard_Location then
1589 Write_Info_Char (Left);
1590 Write_Info_Name (Chars (Tref));
1591 Write_Info_Char (Right);
1593 -- Case of source entity, output location
1596 Write_Info_Char (Left);
1597 Trunit := Get_Source_Unit (Sloc (Tref));
1599 if Trunit /= Curxu then
1600 Write_Info_Nat (Dependency_Num (Trunit));
1601 Write_Info_Char ('|');
1605 (Int (Get_Logical_Line_Number (Sloc (Tref))));
1613 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1616 and then Present (Full_View (Ent))
1618 Ent := Underlying_Type (Ent);
1620 if Present (Ent) then
1621 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1625 Write_Info_Char (Ctyp);
1629 (Int (Get_Column_Number (Sloc (Tref))));
1631 -- If the type comes from an instantiation, add the
1632 -- corresponding info.
1634 Output_Instantiation_Refs (Sloc (Tref));
1635 Write_Info_Char (Right);
1638 end Check_Type_Reference;
1640 -------------------------------
1641 -- Output_Instantiation_Refs --
1642 -------------------------------
1644 procedure Output_Instantiation_Refs (Loc : Source_Ptr) is
1645 Iloc : constant Source_Ptr := Instantiation_Location (Loc);
1646 Lun : Unit_Number_Type;
1647 Cu : constant Unit_Number_Type := Curru;
1650 -- Nothing to do if this is not an instantiation
1652 if Iloc = No_Location then
1656 -- Output instantiation reference
1658 Write_Info_Char ('[');
1659 Lun := Get_Source_Unit (Iloc);
1661 if Lun /= Curru then
1663 Write_Info_Nat (Dependency_Num (Curru));
1664 Write_Info_Char ('|');
1667 Write_Info_Nat (Int (Get_Logical_Line_Number (Iloc)));
1669 -- Recursive call to get nested instantiations
1671 Output_Instantiation_Refs (Iloc);
1673 -- Output final ] after call to get proper nesting
1675 Write_Info_Char (']');
1678 end Output_Instantiation_Refs;
1680 --------------------------
1681 -- Output_Overridden_Op --
1682 --------------------------
1684 procedure Output_Overridden_Op (Old_E : Entity_Id) is
1688 -- The overridden operation has an implicit declaration
1689 -- at the point of derivation. What we want to display
1690 -- is the original operation, which has the actual body
1691 -- (or abstract declaration) that is being overridden.
1692 -- The overridden operation is not always set, e.g. when
1693 -- it is a predefined operator.
1698 -- Follow alias chain if one is present
1700 elsif Present (Alias (Old_E)) then
1702 -- The subprogram may have been implicitly inherited
1703 -- through several levels of derivation, so find the
1704 -- ultimate (source) ancestor.
1706 Op := Alias (Old_E);
1707 while Present (Alias (Op)) loop
1711 -- Normal case of no alias present
1718 and then Sloc (Op) /= Standard_Location
1721 Loc : constant Source_Ptr := Sloc (Op);
1722 Par_Unit : constant Unit_Number_Type :=
1723 Get_Source_Unit (Loc);
1726 Write_Info_Char ('<');
1728 if Par_Unit /= Curxu then
1729 Write_Info_Nat (Dependency_Num (Par_Unit));
1730 Write_Info_Char ('|');
1733 Write_Info_Nat (Int (Get_Logical_Line_Number (Loc)));
1734 Write_Info_Char ('p');
1735 Write_Info_Nat (Int (Get_Column_Number (Loc)));
1736 Write_Info_Char ('>');
1739 end Output_Overridden_Op;
1741 -- Start of processing for Output_One_Ref
1745 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1747 -- Skip reference if it is the only reference to an entity,
1748 -- and it is an END line reference, and the entity is not in
1749 -- the current extended source. This prevents junk entries
1750 -- consisting only of packages with END lines, where no
1751 -- entity from the package is actually referenced.
1754 and then Ent /= Curent
1755 and then (Refno = Nrefs or else
1756 Ent /= Xrefs.Table (Rnums (Refno + 1)).Ent)
1758 not In_Extended_Main_Source_Unit (Ent)
1763 -- For private type, get full view type
1766 and then Present (Full_View (XE.Ent))
1768 Ent := Underlying_Type (Ent);
1770 if Present (Ent) then
1771 Ctyp := Xref_Entity_Letters (Ekind (Ent));
1775 -- Special exception for Boolean
1777 if Ctyp = 'E' and then Is_Boolean_Type (Ent) then
1781 -- For variable reference, get corresponding type
1784 Ent := Etype (XE.Ent);
1785 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1787 -- If variable is private type, get full view type
1790 and then Present (Full_View (Etype (XE.Ent)))
1792 Ent := Underlying_Type (Etype (XE.Ent));
1794 if Present (Ent) then
1795 Ctyp := Fold_Lower (Xref_Entity_Letters (Ekind (Ent)));
1798 elsif Is_Generic_Type (Ent) then
1800 -- If the type of the entity is a generic private type,
1801 -- there is no usable full view, so retain the indication
1802 -- that this is an object.
1807 -- Special handling for access parameter
1810 K : constant Entity_Kind := Ekind (Etype (XE.Ent));
1813 if (K = E_Anonymous_Access_Type
1815 K = E_Anonymous_Access_Subprogram_Type
1817 E_Anonymous_Access_Protected_Subprogram_Type)
1818 and then Is_Formal (XE.Ent)
1822 -- Special handling for Boolean
1824 elsif Ctyp = 'e' and then Is_Boolean_Type (Ent) then
1830 -- Special handling for abstract types and operations
1832 if Is_Overloadable (XE.Ent)
1833 and then Is_Abstract_Subprogram (XE.Ent)
1836 Ctyp := 'x'; -- Abstract procedure
1838 elsif Ctyp = 'V' then
1839 Ctyp := 'y'; -- Abstract function
1842 elsif Is_Type (XE.Ent)
1843 and then Is_Abstract_Type (XE.Ent)
1845 if Is_Interface (XE.Ent) then
1848 elsif Ctyp = 'R' then
1849 Ctyp := 'H'; -- Abstract type
1853 -- Only output reference if interesting type of entity, and
1854 -- suppress self references, except for bodies that act as
1855 -- specs. Also suppress definitions of body formals (we only
1856 -- treat these as references, and the references were
1857 -- separately recorded).
1860 or else (XE.Loc = XE.Def
1863 or else not Is_Subprogram (XE.Ent)))
1864 or else (Is_Formal (XE.Ent)
1865 and then Present (Spec_Entity (XE.Ent)))
1870 -- Start new Xref section if new xref unit
1872 if XE.Eun /= Curxu then
1873 if Write_Info_Col > 1 then
1878 Cursrc := Source_Text (Source_Index (Curxu));
1880 Write_Info_Initiate ('X');
1881 Write_Info_Char (' ');
1882 Write_Info_Nat (Dependency_Num (XE.Eun));
1883 Write_Info_Char (' ');
1884 Write_Info_Name (Reference_Name (Source_Index (XE.Eun)));
1887 -- Start new Entity line if new entity. Note that we
1888 -- consider two entities the same if they have the same
1889 -- name and source location. This causes entities in
1890 -- instantiations to be treated as though they referred
1897 (Name_Change (XE.Ent) or else XE.Def /= Curdef))
1902 Get_Unqualified_Name_String (Chars (XE.Ent));
1904 Curnam (1 .. Curlen) := Name_Buffer (1 .. Curlen);
1906 if Write_Info_Col > 1 then
1910 -- Write column number information
1912 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Def)));
1913 Write_Info_Char (Ctyp);
1914 Write_Info_Nat (Int (Get_Column_Number (XE.Def)));
1916 -- Write level information
1918 Write_Level_Info : declare
1919 function Is_Visible_Generic_Entity
1920 (E : Entity_Id) return Boolean;
1921 -- Check whether E is declared in the visible part
1922 -- of a generic package. For source navigation
1923 -- purposes, treat this as a visible entity.
1925 function Is_Private_Record_Component
1926 (E : Entity_Id) return Boolean;
1927 -- Check whether E is a non-inherited component of a
1928 -- private extension. Even if the enclosing record is
1929 -- public, we want to treat the component as private
1930 -- for navigation purposes.
1932 ---------------------------------
1933 -- Is_Private_Record_Component --
1934 ---------------------------------
1936 function Is_Private_Record_Component
1937 (E : Entity_Id) return Boolean
1939 S : constant Entity_Id := Scope (E);
1942 Ekind (E) = E_Component
1943 and then Nkind (Declaration_Node (S)) =
1944 N_Private_Extension_Declaration
1945 and then Original_Record_Component (E) = E;
1946 end Is_Private_Record_Component;
1948 -------------------------------
1949 -- Is_Visible_Generic_Entity --
1950 -------------------------------
1952 function Is_Visible_Generic_Entity
1953 (E : Entity_Id) return Boolean
1958 -- The Present check here is an error defense
1960 if Present (Scope (E))
1961 and then Ekind (Scope (E)) /= E_Generic_Package
1967 while Present (Par) loop
1969 Nkind (Par) = N_Generic_Package_Declaration
1971 -- Entity is a generic formal
1976 Nkind (Parent (Par)) = N_Package_Specification
1979 Is_List_Member (Par)
1980 and then List_Containing (Par) =
1981 Visible_Declarations (Parent (Par));
1983 Par := Parent (Par);
1988 end Is_Visible_Generic_Entity;
1990 -- Start of processing for Write_Level_Info
1993 if Is_Hidden (Curent)
1994 or else Is_Private_Record_Component (Curent)
1996 Write_Info_Char (' ');
2000 or else Is_Visible_Generic_Entity (Curent)
2002 Write_Info_Char ('*');
2005 Write_Info_Char (' ');
2007 end Write_Level_Info;
2009 -- Output entity name. We use the occurrence from the
2010 -- actual source program at the definition point.
2012 P := Original_Location (Sloc (XE.Ent));
2014 -- Entity is character literal
2016 if Cursrc (P) = ''' then
2017 Write_Info_Char (Cursrc (P));
2018 Write_Info_Char (Cursrc (P + 1));
2019 Write_Info_Char (Cursrc (P + 2));
2021 -- Entity is operator symbol
2023 elsif Cursrc (P) = '"' or else Cursrc (P) = '%' then
2024 Write_Info_Char (Cursrc (P));
2029 Write_Info_Char (Cursrc (P2));
2030 exit when Cursrc (P2) = Cursrc (P);
2033 -- Entity is identifier
2037 if Is_Start_Of_Wide_Char (Cursrc, P) then
2038 Scan_Wide (Cursrc, P, WC, Err);
2039 elsif not Identifier_Char (Cursrc (P)) then
2046 -- Write out the identifier by copying the exact
2047 -- source characters used in its declaration. Note
2048 -- that this means wide characters will be in their
2049 -- original encoded form.
2052 Original_Location (Sloc (XE.Ent)) .. P - 1
2054 Write_Info_Char (Cursrc (J));
2058 -- See if we have a renaming reference
2060 if Is_Object (XE.Ent)
2061 and then Present (Renamed_Object (XE.Ent))
2063 Rref := Renamed_Object (XE.Ent);
2065 elsif Is_Overloadable (XE.Ent)
2066 and then Nkind (Parent (Declaration_Node (XE.Ent))) =
2067 N_Subprogram_Renaming_Declaration
2069 Rref := Name (Parent (Declaration_Node (XE.Ent)));
2071 elsif Ekind (XE.Ent) = E_Package
2072 and then Nkind (Declaration_Node (XE.Ent)) =
2073 N_Package_Renaming_Declaration
2075 Rref := Name (Declaration_Node (XE.Ent));
2081 if Present (Rref) then
2082 if Nkind (Rref) = N_Expanded_Name then
2083 Rref := Selector_Name (Rref);
2086 if Nkind (Rref) = N_Identifier
2087 or else Nkind (Rref) = N_Operator_Symbol
2091 -- For renamed array components, use the array name
2092 -- for the renamed entity, which reflect the fact that
2093 -- in general the whole array is aliased.
2095 elsif Nkind (Rref) = N_Indexed_Component then
2096 if Nkind (Prefix (Rref)) = N_Identifier then
2097 Rref := Prefix (Rref);
2098 elsif Nkind (Prefix (Rref)) = N_Expanded_Name then
2099 Rref := Selector_Name (Prefix (Rref));
2109 -- Write out renaming reference if we have one
2111 if Present (Rref) then
2112 Write_Info_Char ('=');
2114 (Int (Get_Logical_Line_Number (Sloc (Rref))));
2115 Write_Info_Char (':');
2117 (Int (Get_Column_Number (Sloc (Rref))));
2120 -- Indicate that the entity is in the unit of the current
2125 -- Write out information about generic parent, if entity
2128 if Is_Generic_Instance (XE.Ent) then
2130 Gen_Par : constant Entity_Id :=
2133 (Unit_Declaration_Node (XE.Ent)));
2134 Loc : constant Source_Ptr := Sloc (Gen_Par);
2135 Gen_U : constant Unit_Number_Type :=
2136 Get_Source_Unit (Loc);
2139 Write_Info_Char ('[');
2141 if Curru /= Gen_U then
2142 Write_Info_Nat (Dependency_Num (Gen_U));
2143 Write_Info_Char ('|');
2147 (Int (Get_Logical_Line_Number (Loc)));
2148 Write_Info_Char (']');
2152 -- See if we have a type reference and if so output
2154 Check_Type_Reference (XE.Ent, False);
2156 -- Additional information for types with progenitors
2158 if Is_Record_Type (XE.Ent)
2159 and then Present (Interfaces (XE.Ent))
2162 Elmt : Elmt_Id := First_Elmt (Interfaces (XE.Ent));
2164 while Present (Elmt) loop
2165 Check_Type_Reference (Node (Elmt), True);
2170 -- For array types, list index types as well.
2171 -- (This is not C, indices have distinct types).
2173 elsif Is_Array_Type (XE.Ent) then
2177 Indx := First_Index (XE.Ent);
2178 while Present (Indx) loop
2179 Check_Type_Reference
2180 (First_Subtype (Etype (Indx)), True);
2186 -- If the entity is an overriding operation, write info
2187 -- on operation that was overridden.
2189 if Is_Subprogram (XE.Ent)
2190 and then Is_Overriding_Operation (XE.Ent)
2192 Output_Overridden_Op (Overridden_Operation (XE.Ent));
2195 -- End of processing for entity output
2197 Crloc := No_Location;
2200 -- Output the reference
2202 if XE.Loc /= No_Location
2203 and then XE.Loc /= Crloc
2207 -- Start continuation if line full, else blank
2209 if Write_Info_Col > 72 then
2211 Write_Info_Initiate ('.');
2214 Write_Info_Char (' ');
2216 -- Output file number if changed
2218 if XE.Lun /= Curru then
2220 Write_Info_Nat (Dependency_Num (Curru));
2221 Write_Info_Char ('|');
2224 Write_Info_Nat (Int (Get_Logical_Line_Number (XE.Loc)));
2225 Write_Info_Char (XE.Typ);
2227 if Is_Overloadable (XE.Ent)
2228 and then Is_Imported (XE.Ent)
2229 and then XE.Typ = 'b'
2231 Output_Import_Export_Info (XE.Ent);
2234 Write_Info_Nat (Int (Get_Column_Number (XE.Loc)));
2236 Output_Instantiation_Refs (Sloc (XE.Ent));
2247 end Output_References;