1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2024, 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 Debug
; use Debug
;
28 with Debug_A
; use Debug_A
;
29 with Einfo
; use Einfo
;
30 with Einfo
.Utils
; use Einfo
.Utils
;
31 with Elists
; use Elists
;
32 with Exp_SPARK
; use Exp_SPARK
;
33 with Expander
; use Expander
;
34 with Ghost
; use Ghost
;
36 with Lib
.Load
; use Lib
.Load
;
37 with Nlists
; use Nlists
;
38 with Output
; use Output
;
39 with Restrict
; use Restrict
;
40 with Sem_Attr
; use Sem_Attr
;
41 with Sem_Ch2
; use Sem_Ch2
;
42 with Sem_Ch3
; use Sem_Ch3
;
43 with Sem_Ch4
; use Sem_Ch4
;
44 with Sem_Ch5
; use Sem_Ch5
;
45 with Sem_Ch6
; use Sem_Ch6
;
46 with Sem_Ch7
; use Sem_Ch7
;
47 with Sem_Ch8
; use Sem_Ch8
;
48 with Sem_Ch9
; use Sem_Ch9
;
49 with Sem_Ch10
; use Sem_Ch10
;
50 with Sem_Ch11
; use Sem_Ch11
;
51 with Sem_Ch12
; use Sem_Ch12
;
52 with Sem_Ch13
; use Sem_Ch13
;
53 with Sem_Prag
; use Sem_Prag
;
54 with Sem_Util
; use Sem_Util
;
55 with Sinfo
; use Sinfo
;
56 with Sinfo
.Nodes
; use Sinfo
.Nodes
;
57 with Sinfo
.Utils
; use Sinfo
.Utils
;
58 with Stand
; use Stand
;
59 with Stylesw
; use Stylesw
;
60 with Uintp
; use Uintp
;
61 with Uname
; use Uname
;
63 with Ada
.Unchecked_Deallocation
;
65 pragma Warnings
(Off
, Sem_Util
);
66 -- Suppress warnings of unused with for Sem_Util (used only in asserts)
70 Debug_Unit_Walk
: Boolean renames Debug_Flag_Dot_WW
;
71 -- Controls debugging printouts for Walk_Library_Items
73 Outer_Generic_Scope
: Entity_Id
:= Empty
;
74 -- Global reference to the outer scope that is generic. In a non-generic
75 -- context, it is empty. At the moment, it is only used for avoiding
76 -- freezing of external references in generics.
78 Comp_Unit_List
: Elist_Id
:= No_Elist
;
79 -- Used by Walk_Library_Items. This is a list of N_Compilation_Unit nodes
80 -- processed by Semantics, in an appropriate order. Initialized to
81 -- No_Elist, because it's too early to call New_Elmt_List; we will set it
82 -- to New_Elmt_List on first use.
85 with procedure Action
(Withed_Unit
: Node_Id
);
86 procedure Walk_Withs_Immediate
(CU
: Node_Id
; Include_Limited
: Boolean);
87 -- Walk all the with clauses of CU, and call Action for the with'ed unit.
88 -- Ignore limited withs, unless Include_Limited is True. CU must be an
89 -- N_Compilation_Unit.
92 with procedure Action
(Withed_Unit
: Node_Id
);
93 procedure Walk_Withs
(CU
: Node_Id
; Include_Limited
: Boolean);
94 -- Same as Walk_Withs_Immediate, but also include with clauses on subunits
95 -- of this unit, since they count as dependences on their parent library
96 -- item. CU must be an N_Compilation_Unit whose Unit is not an N_Subunit.
102 -- WARNING: This routine manages Ghost regions. Return statements must be
103 -- replaced by gotos which jump to the end of the routine and restore the
106 procedure Analyze
(N
: Node_Id
) is
107 Saved_GM
: constant Ghost_Mode_Type
:= Ghost_Mode
;
108 Saved_IGR
: constant Node_Id
:= Ignored_Ghost_Region
;
109 -- Save the Ghost-related attributes to restore on exit
112 Debug_A_Entry
("analyzing ", N
);
114 -- Immediate return if already analyzed
117 Debug_A_Exit
("analyzing ", N
, " (done, analyzed already)");
121 -- A declaration may be subject to pragma Ghost. Set the mode now to
122 -- ensure that any nodes generated during analysis and expansion are
125 if Is_Declaration
(N
) then
126 Mark_And_Set_Ghost_Declaration
(N
);
129 -- Otherwise processing depends on the node kind
132 when N_Abort_Statement
=>
133 Analyze_Abort_Statement
(N
);
135 when N_Abstract_Subprogram_Declaration
=>
136 Analyze_Abstract_Subprogram_Declaration
(N
);
138 when N_Accept_Alternative
=>
139 Analyze_Accept_Alternative
(N
);
141 when N_Accept_Statement
=>
142 Analyze_Accept_Statement
(N
);
145 Analyze_Aggregate
(N
);
148 Analyze_Allocator
(N
);
151 Analyze_Short_Circuit
(N
);
153 when N_Assignment_Statement
=>
154 Analyze_Assignment
(N
);
156 when N_Asynchronous_Select
=>
157 Analyze_Asynchronous_Select
(N
);
160 Analyze_At_Clause
(N
);
162 when N_Attribute_Reference
=>
163 Analyze_Attribute
(N
);
165 when N_Attribute_Definition_Clause
=>
166 Analyze_Attribute_Definition_Clause
(N
);
168 when N_Block_Statement
=>
169 Analyze_Block_Statement
(N
);
171 when N_Case_Expression
=>
172 Analyze_Case_Expression
(N
);
174 when N_Case_Statement
=>
175 Analyze_Case_Statement
(N
);
177 when N_Character_Literal
=>
178 Analyze_Character_Literal
(N
);
180 when N_Code_Statement
=>
181 Analyze_Code_Statement
(N
);
183 when N_Compilation_Unit
=>
184 Analyze_Compilation_Unit
(N
);
186 when N_Component_Declaration
=>
187 Analyze_Component_Declaration
(N
);
189 when N_Compound_Statement
=>
190 Analyze_Compound_Statement
(N
);
192 when N_Conditional_Entry_Call
=>
193 Analyze_Conditional_Entry_Call
(N
);
195 when N_Delay_Alternative
=>
196 Analyze_Delay_Alternative
(N
);
198 when N_Delay_Relative_Statement
=>
199 Analyze_Delay_Relative
(N
);
201 when N_Delay_Until_Statement
=>
202 Analyze_Delay_Until
(N
);
204 when N_Delta_Aggregate
=>
205 Analyze_Aggregate
(N
);
208 Analyze_Entry_Body
(N
);
210 when N_Entry_Body_Formal_Part
=>
211 Analyze_Entry_Body_Formal_Part
(N
);
213 when N_Entry_Call_Alternative
=>
214 Analyze_Entry_Call_Alternative
(N
);
216 when N_Entry_Declaration
=>
217 Analyze_Entry_Declaration
(N
);
219 when N_Entry_Index_Specification
=>
220 Analyze_Entry_Index_Specification
(N
);
222 when N_Enumeration_Representation_Clause
=>
223 Analyze_Enumeration_Representation_Clause
(N
);
225 when N_Exception_Declaration
=>
226 Analyze_Exception_Declaration
(N
);
228 when N_Exception_Renaming_Declaration
=>
229 Analyze_Exception_Renaming
(N
);
231 when N_Exit_Statement
=>
232 Analyze_Exit_Statement
(N
);
234 when N_Expanded_Name
=>
235 Analyze_Expanded_Name
(N
);
237 when N_Explicit_Dereference
=>
238 Analyze_Explicit_Dereference
(N
);
240 when N_Expression_Function
=>
241 Analyze_Expression_Function
(N
);
243 when N_Expression_With_Actions
=>
244 Analyze_Expression_With_Actions
(N
);
246 when N_Extended_Return_Statement
=>
247 Analyze_Extended_Return_Statement
(N
);
249 when N_Extension_Aggregate
=>
250 Analyze_Aggregate
(N
);
252 when N_Formal_Object_Declaration
=>
253 Analyze_Formal_Object_Declaration
(N
);
255 when N_Formal_Package_Declaration
=>
256 Analyze_Formal_Package_Declaration
(N
);
258 when N_Formal_Subprogram_Declaration
=>
259 Analyze_Formal_Subprogram_Declaration
(N
);
261 when N_Formal_Type_Declaration
=>
262 Analyze_Formal_Type_Declaration
(N
);
264 when N_Free_Statement
=>
265 Analyze_Free_Statement
(N
);
267 when N_Freeze_Entity
=>
268 Analyze_Freeze_Entity
(N
);
270 when N_Freeze_Generic_Entity
=>
271 Analyze_Freeze_Generic_Entity
(N
);
273 when N_Full_Type_Declaration
=>
274 Analyze_Full_Type_Declaration
(N
);
276 when N_Function_Call
=>
277 Analyze_Function_Call
(N
);
279 when N_Function_Instantiation
=>
280 Analyze_Function_Instantiation
(N
);
282 when N_Generic_Function_Renaming_Declaration
=>
283 Analyze_Generic_Function_Renaming
(N
);
285 when N_Generic_Package_Declaration
=>
286 Analyze_Generic_Package_Declaration
(N
);
288 when N_Generic_Package_Renaming_Declaration
=>
289 Analyze_Generic_Package_Renaming
(N
);
291 when N_Generic_Procedure_Renaming_Declaration
=>
292 Analyze_Generic_Procedure_Renaming
(N
);
294 when N_Generic_Subprogram_Declaration
=>
295 Analyze_Generic_Subprogram_Declaration
(N
);
297 when N_Goto_Statement
=>
298 Analyze_Goto_Statement
(N
);
300 when N_Goto_When_Statement
=>
301 Analyze_Goto_When_Statement
(N
);
303 when N_Handled_Sequence_Of_Statements
=>
304 Analyze_Handled_Statements
(N
);
307 Analyze_Identifier
(N
);
309 when N_If_Expression
=>
310 Analyze_If_Expression
(N
);
312 when N_If_Statement
=>
313 Analyze_If_Statement
(N
);
315 when N_Implicit_Label_Declaration
=>
316 Analyze_Implicit_Label_Declaration
(N
);
319 Analyze_Membership_Op
(N
);
321 when N_Incomplete_Type_Declaration
=>
322 Analyze_Incomplete_Type_Decl
(N
);
324 when N_Indexed_Component
=>
325 Analyze_Indexed_Component_Form
(N
);
327 when N_Integer_Literal
=>
328 Analyze_Integer_Literal
(N
);
330 when N_Iterator_Specification
=>
331 Analyze_Iterator_Specification
(N
);
333 when N_Itype_Reference
=>
334 Analyze_Itype_Reference
(N
);
339 when N_Loop_Parameter_Specification
=>
340 Analyze_Loop_Parameter_Specification
(N
);
342 when N_Loop_Statement
=>
343 Analyze_Loop_Statement
(N
);
346 Analyze_Membership_Op
(N
);
351 when N_Null_Statement
=>
352 Analyze_Null_Statement
(N
);
354 when N_Number_Declaration
=>
355 Analyze_Number_Declaration
(N
);
357 when N_Object_Declaration
=>
358 Analyze_Object_Declaration
(N
);
360 when N_Object_Renaming_Declaration
=>
361 Analyze_Object_Renaming
(N
);
363 when N_Operator_Symbol
=>
364 Analyze_Operator_Symbol
(N
);
367 Analyze_Unary_Op
(N
);
370 Analyze_Arithmetic_Op
(N
);
373 Analyze_Logical_Op
(N
);
376 Analyze_Concatenation
(N
);
379 Analyze_Arithmetic_Op
(N
);
382 Analyze_Comparison_Equality_Op
(N
);
385 Analyze_Arithmetic_Op
(N
);
388 Analyze_Comparison_Equality_Op
(N
);
391 Analyze_Comparison_Equality_Op
(N
);
394 Analyze_Comparison_Equality_Op
(N
);
397 Analyze_Comparison_Equality_Op
(N
);
400 Analyze_Unary_Op
(N
);
405 when N_Op_Multiply
=>
406 Analyze_Arithmetic_Op
(N
);
409 Analyze_Comparison_Equality_Op
(N
);
412 Analyze_Negation
(N
);
415 Analyze_Logical_Op
(N
);
418 Analyze_Unary_Op
(N
);
421 Analyze_Arithmetic_Op
(N
);
423 when N_Op_Rotate_Left
=>
424 Analyze_Arithmetic_Op
(N
);
426 when N_Op_Rotate_Right
=>
427 Analyze_Arithmetic_Op
(N
);
429 when N_Op_Shift_Left
=>
430 Analyze_Arithmetic_Op
(N
);
432 when N_Op_Shift_Right
=>
433 Analyze_Arithmetic_Op
(N
);
435 when N_Op_Shift_Right_Arithmetic
=>
436 Analyze_Arithmetic_Op
(N
);
438 when N_Op_Subtract
=>
439 Analyze_Arithmetic_Op
(N
);
442 Analyze_Logical_Op
(N
);
445 Analyze_Short_Circuit
(N
);
447 when N_Others_Choice
=>
448 Analyze_Others_Choice
(N
);
450 when N_Package_Body
=>
451 Analyze_Package_Body
(N
);
453 when N_Package_Body_Stub
=>
454 Analyze_Package_Body_Stub
(N
);
456 when N_Package_Declaration
=>
457 Analyze_Package_Declaration
(N
);
459 when N_Package_Instantiation
=>
460 Analyze_Package_Instantiation
(N
);
462 when N_Package_Renaming_Declaration
=>
463 Analyze_Package_Renaming
(N
);
465 when N_Package_Specification
=>
466 Analyze_Package_Specification
(N
);
468 when N_Parameter_Association
=>
469 Analyze_Parameter_Association
(N
);
474 when N_Private_Extension_Declaration
=>
475 Analyze_Private_Extension_Declaration
(N
);
477 when N_Private_Type_Declaration
=>
478 Analyze_Private_Type_Declaration
(N
);
480 when N_Procedure_Call_Statement
=>
481 Analyze_Procedure_Call
(N
);
483 when N_Procedure_Instantiation
=>
484 Analyze_Procedure_Instantiation
(N
);
486 when N_Protected_Body
=>
487 Analyze_Protected_Body
(N
);
489 when N_Protected_Body_Stub
=>
490 Analyze_Protected_Body_Stub
(N
);
492 when N_Protected_Definition
=>
493 Analyze_Protected_Definition
(N
);
495 when N_Protected_Type_Declaration
=>
496 Analyze_Protected_Type_Declaration
(N
);
498 when N_Qualified_Expression
=>
499 Analyze_Qualified_Expression
(N
);
501 when N_Quantified_Expression
=>
502 Analyze_Quantified_Expression
(N
);
504 when N_Raise_Expression
=>
505 Analyze_Raise_Expression
(N
);
507 when N_Raise_Statement
=>
508 Analyze_Raise_Statement
(N
);
510 when N_Raise_When_Statement
=>
511 Analyze_Raise_When_Statement
(N
);
513 when N_Raise_xxx_Error
=>
514 Analyze_Raise_xxx_Error
(N
);
519 when N_Range_Constraint
=>
520 Analyze_Range
(Range_Expression
(N
));
522 when N_Real_Literal
=>
523 Analyze_Real_Literal
(N
);
525 when N_Record_Representation_Clause
=>
526 Analyze_Record_Representation_Clause
(N
);
529 Analyze_Reference
(N
);
531 when N_Requeue_Statement
=>
534 when N_Return_When_Statement
=>
535 Analyze_Return_When_Statement
(N
);
537 when N_Simple_Return_Statement
=>
538 Analyze_Simple_Return_Statement
(N
);
540 when N_Selected_Component
=>
541 Find_Selected_Component
(N
);
542 -- ??? why not Analyze_Selected_Component, needs comments
544 when N_Selective_Accept
=>
545 Analyze_Selective_Accept
(N
);
547 when N_Single_Protected_Declaration
=>
548 Analyze_Single_Protected_Declaration
(N
);
550 when N_Single_Task_Declaration
=>
551 Analyze_Single_Task_Declaration
(N
);
556 when N_String_Literal
=>
557 Analyze_String_Literal
(N
);
559 when N_Interpolated_String_Literal
=>
560 Analyze_Interpolated_String_Literal
(N
);
562 when N_Subprogram_Body
=>
563 Analyze_Subprogram_Body
(N
);
565 when N_Subprogram_Body_Stub
=>
566 Analyze_Subprogram_Body_Stub
(N
);
568 when N_Subprogram_Declaration
=>
569 Analyze_Subprogram_Declaration
(N
);
571 when N_Subprogram_Renaming_Declaration
=>
572 Analyze_Subprogram_Renaming
(N
);
574 when N_Subtype_Declaration
=>
575 Analyze_Subtype_Declaration
(N
);
577 when N_Subtype_Indication
=>
578 Analyze_Subtype_Indication
(N
);
583 when N_Target_Name
=>
584 Analyze_Target_Name
(N
);
587 Analyze_Task_Body
(N
);
589 when N_Task_Body_Stub
=>
590 Analyze_Task_Body_Stub
(N
);
592 when N_Task_Definition
=>
593 Analyze_Task_Definition
(N
);
595 when N_Task_Type_Declaration
=>
596 Analyze_Task_Type_Declaration
(N
);
598 when N_Terminate_Alternative
=>
599 Analyze_Terminate_Alternative
(N
);
601 when N_Timed_Entry_Call
=>
602 Analyze_Timed_Entry_Call
(N
);
604 when N_Triggering_Alternative
=>
605 Analyze_Triggering_Alternative
(N
);
607 when N_Type_Conversion
=>
608 Analyze_Type_Conversion
(N
);
610 when N_Unchecked_Expression
=>
611 Analyze_Unchecked_Expression
(N
);
613 when N_Unchecked_Type_Conversion
=>
614 Analyze_Unchecked_Type_Conversion
(N
);
616 when N_Use_Package_Clause
=>
617 Analyze_Use_Package
(N
);
619 when N_Use_Type_Clause
=>
620 Analyze_Use_Type
(N
);
622 when N_Validate_Unchecked_Conversion
=>
625 when N_Variant_Part
=>
626 Analyze_Variant_Part
(N
);
628 when N_With_Clause
=>
629 Analyze_With_Clause
(N
);
631 -- A call to analyze a marker is ignored because the node does not
632 -- have any static and run-time semantics.
635 | N_Variable_Reference_Marker
639 -- A call to analyze the Empty node is an error, but most likely it
640 -- is an error caused by an attempt to analyze a malformed piece of
641 -- tree caused by some other error, so if there have been any other
642 -- errors, we just ignore it, otherwise it is a real internal error
643 -- which we complain about.
645 -- We must also consider the case of call to a runtime function that
646 -- is not available in the configurable runtime.
649 pragma Assert
(Serious_Errors_Detected
/= 0
650 or else Configurable_Run_Time_Violations
/= 0);
653 -- A call to analyze the error node is simply ignored, to avoid
654 -- causing cascaded errors (happens of course only in error cases)
655 -- Disable expansion in case it is still enabled, to prevent other
656 -- subsequent compiler glitches.
659 Expander_Mode_Save_And_Set
(False);
662 -- Push/Pop nodes normally don't come through an analyze call. An
663 -- exception is the dummy ones bracketing a subprogram body. In any
664 -- case there is nothing to be done to analyze such nodes.
666 when N_Push_Pop_xxx_Label
=>
669 -- SCIL nodes don't need analysis because they are decorated when
670 -- they are built. They are added to the tree by Insert_Actions and
671 -- the call to analyze them is generated when the full list is
674 when N_SCIL_Dispatch_Table_Tag_Init
675 | N_SCIL_Dispatching_Call
676 | N_SCIL_Membership_Test
680 -- A quantified expression with a missing "all" or "some" qualifier
681 -- looks identical to an iterated component association. By language
682 -- definition, the latter must be present within array aggregates. If
683 -- this is not the case, then the iterated component association is
684 -- really an illegal quantified expression. Diagnose this scenario.
686 when N_Iterated_Component_Association
=>
687 Diagnose_Iterated_Component_Association
(N
);
689 when N_Iterated_Element_Association
=>
690 null; -- May require a more precise error if misplaced.
692 -- For the remaining node types, we generate compiler abort, because
693 -- these nodes are always analyzed within the Sem_Chn routines and
694 -- there should never be a case of making a call to the main Analyze
695 -- routine for these node kinds. For example, an N_Access_Definition
696 -- node appears only in the context of a type declaration, and is
697 -- processed by the analyze routine for type declarations.
699 when N_Abortable_Part
700 | N_Access_Definition
701 | N_Access_Function_Definition
702 | N_Access_Procedure_Definition
703 | N_Access_To_Object_Definition
704 | N_Aspect_Specification
705 | N_Case_Expression_Alternative
706 | N_Case_Statement_Alternative
707 | N_Compilation_Unit_Aux
708 | N_Component_Association
710 | N_Component_Definition
712 | N_Constrained_Array_Definition
714 | N_Decimal_Fixed_Point_Definition
715 | N_Defining_Character_Literal
716 | N_Defining_Identifier
717 | N_Defining_Operator_Symbol
718 | N_Defining_Program_Unit_Name
720 | N_Derived_Type_Definition
722 | N_Digits_Constraint
723 | N_Discriminant_Association
724 | N_Discriminant_Specification
726 | N_Entry_Call_Statement
727 | N_Enumeration_Type_Definition
728 | N_Exception_Handler
729 | N_Floating_Point_Definition
730 | N_Formal_Decimal_Fixed_Point_Definition
731 | N_Formal_Derived_Type_Definition
732 | N_Formal_Discrete_Type_Definition
733 | N_Formal_Floating_Point_Definition
734 | N_Formal_Modular_Type_Definition
735 | N_Formal_Ordinary_Fixed_Point_Definition
736 | N_Formal_Private_Type_Definition
737 | N_Formal_Incomplete_Type_Definition
738 | N_Formal_Signed_Integer_Type_Definition
739 | N_Function_Specification
740 | N_Generic_Association
741 | N_Index_Or_Discriminant_Constraint
744 | N_Modular_Type_Definition
745 | N_Ordinary_Fixed_Point_Definition
746 | N_Parameter_Specification
747 | N_Pragma_Argument_Association
748 | N_Procedure_Specification
749 | N_Real_Range_Specification
750 | N_Record_Definition
751 | N_Signed_Integer_Type_Definition
752 | N_Unconstrained_Array_Definition
760 Debug_A_Exit
("analyzing ", N
, " (done)");
762 -- Set Is_Not_Self_Hidden flag. RM-8.3(16) says a declaration
763 -- is no longer hidden from all visibility after "the end of the
764 -- declaration", so we set the flag here (in addition to setting it
765 -- elsewhere to handle the "except..." cases of 8.3(16)). However,
766 -- we implement 3.8(10) using the same flag, so in that case we
767 -- need to defer the setting until the end of the record.
770 E
: constant Entity_Id
:= Defining_Entity_Or_Empty
(N
);
773 if Ekind
(E
) = E_Void
774 and then Nkind
(N
) = N_Component_Declaration
775 and then Present
(Scope
(E
))
776 and then Ekind
(Scope
(E
)) = E_Record_Type
778 null; -- Set it later, in Analyze_Component_Declaration
779 elsif not Is_Not_Self_Hidden
(E
) then
780 Set_Is_Not_Self_Hidden
(E
);
785 -- Mark relevant use-type and use-package clauses as effective
786 -- preferring the original node over the analyzed one in the case that
787 -- constant folding has occurred and removed references that need to be
788 -- examined. Also, if the node in question is overloaded then this is
789 -- deferred until resolution.
792 Operat
: Node_Id
:= Empty
;
794 -- Attempt to obtain a checkable operator node
796 if Nkind
(Original_Node
(N
)) in N_Op
then
797 Operat
:= Original_Node
(N
);
798 elsif Nkind
(N
) in N_Op
then
805 and then Present
(Entity
(Operat
))
806 and then not Is_Overloaded
(Operat
)
808 Mark_Use_Clauses
(Operat
);
812 -- Now that we have analyzed the node, we call the expander to perform
813 -- possible expansion. We skip this for subexpressions, because we don't
814 -- have the type yet, and the expander will need to know the type before
815 -- it can do its job. For subexpression nodes, the call to the expander
816 -- happens in Sem_Res.Resolve. A special exception is Raise_xxx_Error,
817 -- which can appear in a statement context, and needs expanding now in
818 -- the case (distinguished by Etype, as documented in Sinfo).
820 -- The Analyzed flag is also set at this point for non-subexpression
821 -- nodes (in the case of subexpression nodes, we can't set the flag yet,
822 -- since resolution and expansion have not yet been completed). Note
823 -- that for N_Raise_xxx_Error we have to distinguish the expression
824 -- case from the statement case.
826 if Nkind
(N
) not in N_Subexpr
827 or else (Nkind
(N
) in N_Raise_xxx_Error
828 and then Etype
(N
) = Standard_Void_Type
)
832 -- Replace a reference to a renaming with the renamed object for SPARK.
833 -- In general this modification is performed by Expand_SPARK, however
834 -- certain constructs may not reach the resolution or expansion phase
835 -- and thus remain unchanged. The replacement is not performed when the
836 -- construct is overloaded as resolution must first take place. This is
837 -- also not done when analyzing a generic to preserve the original tree
838 -- and because the reference may become overloaded in the instance.
841 and then Nkind
(N
) in N_Expanded_Name | N_Identifier
842 and then not Is_Overloaded
(N
)
843 and then not Inside_A_Generic
845 Expand_SPARK_Potential_Renaming
(N
);
848 Restore_Ghost_Region
(Saved_GM
, Saved_IGR
);
851 -- Version with check(s) suppressed
853 procedure Analyze
(N
: Node_Id
; Suppress
: Check_Id
) is
855 if Suppress
= All_Checks
then
857 Svs
: constant Suppress_Array
:= Scope_Suppress
.Suppress
;
859 Scope_Suppress
.Suppress
:= (others => True);
861 Scope_Suppress
.Suppress
:= Svs
;
866 Svg
: constant Boolean := Scope_Suppress
.Suppress
(Suppress
);
868 Scope_Suppress
.Suppress
(Suppress
) := True;
870 Scope_Suppress
.Suppress
(Suppress
) := Svg
;
879 procedure Analyze_List
(L
: List_Id
) is
884 while Present
(Node
) loop
890 -- Version with check(s) suppressed
892 procedure Analyze_List
(L
: List_Id
; Suppress
: Check_Id
) is
894 if Suppress
= All_Checks
then
896 Svs
: constant Suppress_Array
:= Scope_Suppress
.Suppress
;
898 Scope_Suppress
.Suppress
:= (others => True);
900 Scope_Suppress
.Suppress
:= Svs
;
905 Svg
: constant Boolean := Scope_Suppress
.Suppress
(Suppress
);
907 Scope_Suppress
.Suppress
(Suppress
) := True;
909 Scope_Suppress
.Suppress
(Suppress
) := Svg
;
914 --------------------------
915 -- Copy_Suppress_Status --
916 --------------------------
918 procedure Copy_Suppress_Status
924 pragma Warnings
(Off
, Found
);
926 procedure Search_Stack
927 (Top
: Suppress_Stack_Entry_Ptr
;
928 Found
: out Boolean);
929 -- Search given suppress stack for matching entry for entity. If found
930 -- then set Checks_May_Be_Suppressed on To, and push an appropriate
931 -- entry for To onto the local suppress stack.
937 procedure Search_Stack
938 (Top
: Suppress_Stack_Entry_Ptr
;
941 Ptr
: Suppress_Stack_Entry_Ptr
;
945 while Ptr
/= null loop
947 and then (Ptr
.Check
= All_Checks
or else Ptr
.Check
= C
)
950 Set_Checks_May_Be_Suppressed
(To
, True);
951 Push_Local_Suppress_Stack_Entry
967 -- Start of processing for Copy_Suppress_Status
970 if not Checks_May_Be_Suppressed
(From
) then
974 -- First search the global entity suppress table for a matching entry.
975 -- We also search this in reverse order so that if there are multiple
976 -- pragmas for the same entity, the last one applies.
978 Search_Stack
(Global_Suppress_Stack_Top
, Found
);
984 -- Now search the local entity suppress stack, we search this in
985 -- reverse order so that we get the innermost entry that applies to
986 -- this case if there are nested entries. Note that for the purpose
987 -- of this procedure we are ONLY looking for entries corresponding
988 -- to a two-argument Suppress, where the second argument matches From.
990 Search_Stack
(Local_Suppress_Stack_Top
, Found
);
991 end Copy_Suppress_Status
;
993 -------------------------
994 -- Enter_Generic_Scope --
995 -------------------------
997 procedure Enter_Generic_Scope
(S
: Entity_Id
) is
999 if No
(Outer_Generic_Scope
) then
1000 Outer_Generic_Scope
:= S
;
1002 end Enter_Generic_Scope
;
1004 ------------------------
1005 -- Exit_Generic_Scope --
1006 ------------------------
1008 procedure Exit_Generic_Scope
(S
: Entity_Id
) is
1010 if S
= Outer_Generic_Scope
then
1011 Outer_Generic_Scope
:= Empty
;
1013 end Exit_Generic_Scope
;
1015 -----------------------
1016 -- Explicit_Suppress --
1017 -----------------------
1019 function Explicit_Suppress
(E
: Entity_Id
; C
: Check_Id
) return Boolean is
1020 Ptr
: Suppress_Stack_Entry_Ptr
;
1023 if not Checks_May_Be_Suppressed
(E
) then
1027 Ptr
:= Global_Suppress_Stack_Top
;
1028 while Ptr
/= null loop
1030 and then (Ptr
.Check
= All_Checks
or else Ptr
.Check
= C
)
1032 return Ptr
.Suppress
;
1040 end Explicit_Suppress
;
1042 -----------------------------
1043 -- External_Ref_In_Generic --
1044 -----------------------------
1046 function External_Ref_In_Generic
(E
: Entity_Id
) return Boolean is
1050 -- Entity is global if defined outside of current Outer_Generic_Scope:
1051 -- Either the entity has a smaller depth than the outer generic, or it
1052 -- is in a different compilation unit, or it is defined within a unit
1053 -- in the same compilation, that is not within the outer generic.
1055 if No
(Outer_Generic_Scope
) then
1058 -- It makes no sense to compare depths if not in same unit. Scope_Depth
1059 -- is not set for inherited operations.
1061 elsif not In_Same_Source_Unit
(E
, Outer_Generic_Scope
)
1062 or else not Scope_Depth_Set
(Scope
(E
))
1063 or else Scope_Depth
(Scope
(E
)) < Scope_Depth
(Outer_Generic_Scope
)
1069 while Present
(Scop
) loop
1070 if Scop
= Outer_Generic_Scope
then
1072 elsif Scope_Depth
(Scop
) < Scope_Depth
(Outer_Generic_Scope
) then
1075 Scop
:= Scope
(Scop
);
1081 end External_Ref_In_Generic
;
1087 procedure Initialize
is
1088 Next
: Suppress_Stack_Entry_Ptr
;
1090 procedure Free
is new Ada
.Unchecked_Deallocation
1091 (Suppress_Stack_Entry
, Suppress_Stack_Entry_Ptr
);
1094 -- Free any global suppress stack entries from a previous invocation
1095 -- of the compiler (in the normal case this loop does nothing).
1097 while Suppress_Stack_Entries
/= null loop
1098 Next
:= Suppress_Stack_Entries
.Next
;
1099 Free
(Suppress_Stack_Entries
);
1100 Suppress_Stack_Entries
:= Next
;
1103 Local_Suppress_Stack_Top
:= null;
1104 Global_Suppress_Stack_Top
:= null;
1106 -- Clear scope stack, and reset global variables
1109 Unloaded_Subunits
:= False;
1112 ------------------------------
1113 -- Insert_After_And_Analyze --
1114 ------------------------------
1116 procedure Insert_After_And_Analyze
(N
: Node_Id
; M
: Node_Id
) is
1122 -- If we are not at the end of the list, then the easiest
1123 -- coding is simply to insert before our successor.
1125 if Present
(Next
(N
)) then
1126 Insert_Before_And_Analyze
(Next
(N
), M
);
1128 -- Case of inserting at the end of the list
1131 -- Capture the Node_Id of the node to be inserted. This Node_Id
1132 -- will still be the same after the insert operation.
1135 Insert_After
(N
, M
);
1137 -- Now just analyze from the inserted node to the end of
1138 -- the new list (note that this properly handles the case
1139 -- where any of the analyze calls result in the insertion of
1140 -- nodes after the analyzed node, expecting analysis).
1142 while Present
(Node
) loop
1144 Mark_Rewrite_Insertion
(Node
);
1149 end Insert_After_And_Analyze
;
1151 -- Version with check(s) suppressed
1153 procedure Insert_After_And_Analyze
1156 Suppress
: Check_Id
)
1159 if Suppress
= All_Checks
then
1161 Svs
: constant Suppress_Array
:= Scope_Suppress
.Suppress
;
1163 Scope_Suppress
.Suppress
:= (others => True);
1164 Insert_After_And_Analyze
(N
, M
);
1165 Scope_Suppress
.Suppress
:= Svs
;
1170 Svg
: constant Boolean := Scope_Suppress
.Suppress
(Suppress
);
1172 Scope_Suppress
.Suppress
(Suppress
) := True;
1173 Insert_After_And_Analyze
(N
, M
);
1174 Scope_Suppress
.Suppress
(Suppress
) := Svg
;
1177 end Insert_After_And_Analyze
;
1179 -------------------------------
1180 -- Insert_Before_And_Analyze --
1181 -------------------------------
1183 procedure Insert_Before_And_Analyze
(N
: Node_Id
; M
: Node_Id
) is
1189 -- Capture the Node_Id of the first list node to be inserted.
1190 -- This will still be the first node after the insert operation,
1191 -- since Insert_List_After does not modify the Node_Id values.
1194 Insert_Before
(N
, M
);
1196 -- The insertion does not change the Id's of any of the nodes in
1197 -- the list, and they are still linked, so we can simply loop from
1198 -- the original first node until we meet the node before which the
1199 -- insertion is occurring. Note that this properly handles the case
1200 -- where any of the analyzed nodes insert nodes after themselves,
1201 -- expecting them to get analyzed.
1203 while Node
/= N
loop
1205 Mark_Rewrite_Insertion
(Node
);
1209 end Insert_Before_And_Analyze
;
1211 -- Version with check(s) suppressed
1213 procedure Insert_Before_And_Analyze
1216 Suppress
: Check_Id
)
1219 if Suppress
= All_Checks
then
1221 Svs
: constant Suppress_Array
:= Scope_Suppress
.Suppress
;
1223 Scope_Suppress
.Suppress
:= (others => True);
1224 Insert_Before_And_Analyze
(N
, M
);
1225 Scope_Suppress
.Suppress
:= Svs
;
1230 Svg
: constant Boolean := Scope_Suppress
.Suppress
(Suppress
);
1232 Scope_Suppress
.Suppress
(Suppress
) := True;
1233 Insert_Before_And_Analyze
(N
, M
);
1234 Scope_Suppress
.Suppress
(Suppress
) := Svg
;
1237 end Insert_Before_And_Analyze
;
1239 --------------------------------------------
1240 -- Insert_Before_First_Source_Declaration --
1241 --------------------------------------------
1243 procedure Insert_Before_First_Source_Declaration
1249 -- Inspect the declarations of the related subprogram body looking for
1250 -- the first source declaration.
1252 pragma Assert
(Present
(Decls
));
1254 Decl
:= First
(Decls
);
1255 while Present
(Decl
) loop
1256 if Comes_From_Source
(Decl
) then
1257 Insert_Before
(Decl
, Stmt
);
1264 -- If we get there, then the subprogram body lacks any source
1265 -- declarations. The body of _Postconditions now acts as the
1266 -- last declaration.
1268 Append
(Stmt
, Decls
);
1269 end Insert_Before_First_Source_Declaration
;
1271 -----------------------------------
1272 -- Insert_List_After_And_Analyze --
1273 -----------------------------------
1275 procedure Insert_List_After_And_Analyze
(N
: Node_Id
; L
: List_Id
) is
1276 After
: constant Node_Id
:= Next
(N
);
1280 if Is_Non_Empty_List
(L
) then
1282 -- Capture the Node_Id of the first list node to be inserted.
1283 -- This will still be the first node after the insert operation,
1284 -- since Insert_List_After does not modify the Node_Id values.
1287 Insert_List_After
(N
, L
);
1289 -- Now just analyze from the original first node until we get to the
1290 -- successor of the original insertion point (which may be Empty if
1291 -- the insertion point was at the end of the list). Note that this
1292 -- properly handles the case where any of the analyze calls result in
1293 -- the insertion of nodes after the analyzed node (possibly calling
1294 -- this routine recursively).
1296 while Node
/= After
loop
1298 Mark_Rewrite_Insertion
(Node
);
1302 end Insert_List_After_And_Analyze
;
1304 ------------------------------------
1305 -- Insert_List_Before_And_Analyze --
1306 ------------------------------------
1308 procedure Insert_List_Before_And_Analyze
(N
: Node_Id
; L
: List_Id
) is
1312 if Is_Non_Empty_List
(L
) then
1314 -- Capture the Node_Id of the first list node to be inserted. This
1315 -- will still be the first node after the insert operation, since
1316 -- Insert_List_After does not modify the Node_Id values.
1319 Insert_List_Before
(N
, L
);
1321 -- The insertion does not change the Id's of any of the nodes in
1322 -- the list, and they are still linked, so we can simply loop from
1323 -- the original first node until we meet the node before which the
1324 -- insertion is occurring. Note that this properly handles the case
1325 -- where any of the analyzed nodes insert nodes after themselves,
1326 -- expecting them to get analyzed.
1328 while Node
/= N
loop
1330 Mark_Rewrite_Insertion
(Node
);
1334 end Insert_List_Before_And_Analyze
;
1342 Scope_Stack
.Release
;
1343 Scope_Stack
.Locked
:= True;
1346 ------------------------
1347 -- Preanalysis_Active --
1348 ------------------------
1350 function Preanalysis_Active
return Boolean is
1352 return not Full_Analysis
and not Expander_Active
;
1353 end Preanalysis_Active
;
1359 procedure Preanalyze
(N
: Node_Id
) is
1360 Save_Full_Analysis
: constant Boolean := Full_Analysis
;
1363 Full_Analysis
:= False;
1364 Expander_Mode_Save_And_Set
(False);
1366 -- See comment in sem_res.adb for Preanalyze_And_Resolve
1369 or else Nkind
(Parent
(N
)) = N_Simple_Return_Statement
1373 Analyze
(N
, Suppress
=> All_Checks
);
1376 Expander_Mode_Restore
;
1377 Full_Analysis
:= Save_Full_Analysis
;
1380 --------------------------------------
1381 -- Push_Global_Suppress_Stack_Entry --
1382 --------------------------------------
1384 procedure Push_Global_Suppress_Stack_Entry
1385 (Entity
: Entity_Id
;
1390 Global_Suppress_Stack_Top
:=
1391 new Suppress_Stack_Entry
'
1394 Suppress => Suppress,
1395 Prev => Global_Suppress_Stack_Top,
1396 Next => Suppress_Stack_Entries);
1397 Suppress_Stack_Entries := Global_Suppress_Stack_Top;
1399 end Push_Global_Suppress_Stack_Entry;
1401 -------------------------------------
1402 -- Push_Local_Suppress_Stack_Entry --
1403 -------------------------------------
1405 procedure Push_Local_Suppress_Stack_Entry
1406 (Entity : Entity_Id;
1411 Local_Suppress_Stack_Top :=
1412 new Suppress_Stack_Entry'
1415 Suppress
=> Suppress
,
1416 Prev
=> Local_Suppress_Stack_Top
,
1417 Next
=> Suppress_Stack_Entries
);
1418 Suppress_Stack_Entries
:= Local_Suppress_Stack_Top
;
1421 end Push_Local_Suppress_Stack_Entry
;
1427 procedure Semantics
(Comp_Unit
: Node_Id
) is
1428 procedure Do_Analyze
;
1429 -- Perform the analysis of the compilation unit
1435 -- WARNING: This routine manages Ghost regions. Return statements must
1436 -- be replaced by gotos which jump to the end of the routine and restore
1439 procedure Do_Analyze
is
1440 Saved_GM
: constant Ghost_Mode_Type
:= Ghost_Mode
;
1441 Saved_IGR
: constant Node_Id
:= Ignored_Ghost_Region
;
1442 Saved_ISMP
: constant Boolean :=
1443 Ignore_SPARK_Mode_Pragmas_In_Instance
;
1444 -- Save Ghost and SPARK mode-related data to restore on exit
1446 -- Generally style checks are preserved across compilations, with
1447 -- one exception: s-oscons.ads, which allows arbitrary long lines
1448 -- unconditionally, and has no restore mechanism, because it is
1449 -- intended as a lowest-level Pure package.
1451 Saved_ML
: constant Int
:= Style_Max_Line_Length
;
1452 Saved_CML
: constant Boolean := Style_Check_Max_Line_Length
;
1457 List
:= Save_Scope_Stack
;
1458 Push_Scope
(Standard_Standard
);
1460 -- Set up a clean environment before analyzing
1462 Install_Ghost_Region
(None
, Empty
);
1463 Ignore_SPARK_Mode_Pragmas_In_Instance
:= False;
1465 Outer_Generic_Scope
:= Empty
;
1466 Scope_Suppress
:= Suppress_Options
;
1468 (Scope_Stack
.Last
).Component_Alignment_Default
:=
1469 Configuration_Component_Alignment
;
1471 (Scope_Stack
.Last
).Is_Active_Stack_Base
:= True;
1473 -- Now analyze the top level compilation unit node
1475 Analyze
(Comp_Unit
);
1477 -- Check for scope mismatch on exit from compilation
1479 pragma Assert
(Current_Scope
= Standard_Standard
1480 or else Comp_Unit
= Cunit
(Main_Unit
));
1482 -- Then pop entry for Standard, and pop implicit types
1485 Restore_Scope_Stack
(List
);
1486 Style_Max_Line_Length
:= Saved_ML
;
1487 Style_Check_Max_Line_Length
:= Saved_CML
;
1489 Restore_Ghost_Region
(Saved_GM
, Saved_IGR
);
1490 Ignore_SPARK_Mode_Pragmas_In_Instance
:= Saved_ISMP
;
1495 -- The following locations save the corresponding global flags and
1496 -- variables so that they can be restored on completion. This is needed
1497 -- so that calls to Rtsfind start with the proper default values for
1498 -- these variables, and also that such calls do not disturb the settings
1499 -- for units being analyzed at a higher level.
1501 S_Current_Sem_Unit
: constant Unit_Number_Type
:= Current_Sem_Unit
;
1502 S_Full_Analysis
: constant Boolean := Full_Analysis
;
1503 S_GNAT_Mode
: constant Boolean := GNAT_Mode
;
1504 S_Global_Dis_Names
: constant Boolean := Global_Discard_Names
;
1505 S_In_Assertion_Expr
: constant Nat
:= In_Assertion_Expr
;
1506 S_In_Declare_Expr
: constant Nat
:= In_Declare_Expr
;
1507 S_In_Default_Expr
: constant Boolean := In_Default_Expr
;
1508 S_In_Spec_Expr
: constant Boolean := In_Spec_Expression
;
1509 S_Inside_A_Generic
: constant Boolean := Inside_A_Generic
;
1510 S_Outer_Gen_Scope
: constant Entity_Id
:= Outer_Generic_Scope
;
1511 S_Style_Check
: constant Boolean := Style_Check
;
1513 Already_Analyzed
: constant Boolean := Analyzed
(Comp_Unit
);
1515 Curunit
: constant Unit_Number_Type
:= Get_Cunit_Unit_Number
(Comp_Unit
);
1516 -- New value of Current_Sem_Unit
1518 Generic_Main
: constant Boolean :=
1519 Nkind
(Unit
(Cunit
(Main_Unit
))) in N_Generic_Declaration
;
1520 -- If the main unit is generic, every compiled unit, including its
1521 -- context, is compiled with expansion disabled.
1523 Is_Main_Unit_Or_Main_Unit_Spec
: constant Boolean :=
1526 (Nkind
(Unit
(Cunit
(Main_Unit
))) = N_Package_Body
1527 and then Library_Unit
(Cunit
(Main_Unit
)) = Cunit
(Curunit
));
1528 -- Configuration flags have special settings when compiling a predefined
1529 -- file as a main unit. This applies to its spec as well.
1531 Ext_Main_Source_Unit
: constant Boolean :=
1532 In_Extended_Main_Source_Unit
(Comp_Unit
);
1533 -- Determine if unit is in extended main source unit
1535 Save_Config_Attrs
: Config_Switches_Type
;
1536 -- Variable used to save values of config switches while we analyze the
1537 -- new unit, to be restored on exit for proper recursive behavior.
1539 Save_Cunit_Restrictions
: Save_Cunit_Boolean_Restrictions
;
1540 -- Used to save non-partition wide restrictions before processing new
1541 -- unit. All with'ed units are analyzed with config restrictions reset
1542 -- and we need to restore these saved values at the end.
1544 Save_Preanalysis_Counter
: constant Nat
:=
1545 Inside_Preanalysis_Without_Freezing
;
1546 -- Saves the preanalysis nesting-level counter; required since we may
1547 -- need to analyze a unit as a consequence of the preanalysis of an
1548 -- expression without freezing (and the loaded unit must be fully
1551 -- Start of processing for Semantics
1554 Inside_Preanalysis_Without_Freezing
:= 0;
1556 if Debug_Unit_Walk
then
1557 if Already_Analyzed
then
1558 Write_Str
("(done)");
1562 (Get_Cunit_Unit_Number
(Comp_Unit
),
1568 Compiler_State
:= Analyzing
;
1569 Current_Sem_Unit
:= Curunit
;
1571 -- Compile predefined units with GNAT_Mode set to True, to properly
1572 -- process the categorization stuff. However, do not set GNAT_Mode
1573 -- to True for the renamings units (Text_IO, IO_Exceptions, Direct_IO,
1574 -- Sequential_IO) as this would prevent pragma Extend_System from being
1575 -- taken into account, for example when Text_IO is renaming DEC.Text_IO.
1577 if Is_Predefined_Unit
(Current_Sem_Unit
)
1578 and then not Is_Predefined_Renaming
(Current_Sem_Unit
)
1583 -- For generic main, never do expansion
1585 if Generic_Main
then
1586 Expander_Mode_Save_And_Set
(False);
1591 Expander_Mode_Save_And_Set
1593 -- Turn on expansion if generating code
1595 (Operating_Mode
= Generate_Code
1597 -- Or if special debug flag -gnatdx is set
1599 or else Debug_Flag_X
1601 -- Or if in configuration run-time mode. We do this so we get
1602 -- error messages about missing entities in the run-time even
1603 -- if we are compiling in -gnatc (no code generation) mode.
1604 -- Similar processing applies to No_Run_Time_Mode. However,
1605 -- don't do this if debug flag -gnatd.Z is set or when we are
1606 -- compiling a separate unit (this is to handle a situation
1607 -- where this new processing causes trouble).
1610 ((Configurable_Run_Time_Mode
or No_Run_Time_Mode
)
1611 and then not Debug_Flag_Dot_ZZ
1612 and then Nkind
(Unit
(Cunit
(Main_Unit
))) /= N_Subunit
));
1615 Full_Analysis
:= True;
1616 Inside_A_Generic
:= False;
1617 In_Assertion_Expr
:= 0;
1618 In_Declare_Expr
:= 0;
1619 In_Default_Expr
:= False;
1620 In_Spec_Expression
:= False;
1621 Set_Comes_From_Source_Default
(False);
1623 -- Save current config switches and reset then appropriately
1625 Save_Config_Attrs
:= Save_Config_Switches
;
1627 (Is_Internal_Unit
(Current_Sem_Unit
),
1628 Is_Main_Unit_Or_Main_Unit_Spec
);
1630 -- Save current non-partition-wide restrictions
1632 Save_Cunit_Restrictions
:= Cunit_Boolean_Restrictions_Save
;
1634 -- For unit in main extended unit, we reset the configuration values
1635 -- for the non-partition-wide restrictions. For other units reset them.
1637 if Ext_Main_Source_Unit
then
1638 Restore_Config_Cunit_Boolean_Restrictions
;
1640 Reset_Cunit_Boolean_Restrictions
;
1643 -- Turn off style checks for unit that is not in the extended main
1644 -- source unit. This improves processing efficiency for such units
1645 -- (for which we don't want style checks anyway, and where they will
1646 -- get suppressed), and is definitely needed to stop some style checks
1647 -- from invading the run-time units (e.g. overriding checks).
1649 if not Ext_Main_Source_Unit
then
1650 Style_Check
:= False;
1652 -- If this is part of the extended main source unit, set style check
1653 -- mode to match the style check mode of the main source unit itself.
1656 Style_Check
:= Style_Check_Main
;
1659 -- Only do analysis of unit that has not already been analyzed
1661 if not Analyzed
(Comp_Unit
) then
1662 Initialize_Version
(Current_Sem_Unit
);
1664 -- Do analysis, and then append the compilation unit onto the
1665 -- Comp_Unit_List, if appropriate. This is done after analysis,
1666 -- so if this unit depends on some others, they have already been
1667 -- appended. We ignore bodies, except for the main unit itself, and
1668 -- for subprogram bodies that act as specs. We have also to guard
1669 -- against ill-formed subunits that have an improper context.
1673 if Present
(Comp_Unit
)
1674 and then Nkind
(Unit
(Comp_Unit
)) in N_Proper_Body
1675 and then (Nkind
(Unit
(Comp_Unit
)) /= N_Subprogram_Body
1676 or else not Acts_As_Spec
(Comp_Unit
))
1677 and then not Ext_Main_Source_Unit
1682 Append_New_Elmt
(Comp_Unit
, To
=> Comp_Unit_List
);
1684 if Debug_Unit_Walk
then
1685 Write_Str
("Appending ");
1687 (Get_Cunit_Unit_Number
(Comp_Unit
), Unit
(Comp_Unit
));
1692 -- Save indication of dynamic elaboration checks for ALI file
1694 Set_Dynamic_Elab
(Current_Sem_Unit
, Dynamic_Elaboration_Checks
);
1696 -- Restore settings of saved switches to entry values
1698 Current_Sem_Unit
:= S_Current_Sem_Unit
;
1699 Full_Analysis
:= S_Full_Analysis
;
1700 Global_Discard_Names
:= S_Global_Dis_Names
;
1701 GNAT_Mode
:= S_GNAT_Mode
;
1702 In_Assertion_Expr
:= S_In_Assertion_Expr
;
1703 In_Declare_Expr
:= S_In_Declare_Expr
;
1704 In_Default_Expr
:= S_In_Default_Expr
;
1705 In_Spec_Expression
:= S_In_Spec_Expr
;
1706 Inside_A_Generic
:= S_Inside_A_Generic
;
1707 Outer_Generic_Scope
:= S_Outer_Gen_Scope
;
1708 Style_Check
:= S_Style_Check
;
1710 Restore_Config_Switches
(Save_Config_Attrs
);
1712 -- Deal with restore of restrictions
1714 Cunit_Boolean_Restrictions_Restore
(Save_Cunit_Restrictions
);
1716 Expander_Mode_Restore
;
1718 if Debug_Unit_Walk
then
1721 if Already_Analyzed
then
1722 Write_Str
("(done)");
1726 (Get_Cunit_Unit_Number
(Comp_Unit
),
1731 Inside_Preanalysis_Without_Freezing
:= Save_Preanalysis_Counter
;
1738 function ss
(Index
: Int
) return Scope_Stack_Entry
is
1740 return Scope_Stack
.Table
(Index
);
1747 function sst
return Scope_Stack_Entry
is
1749 return ss
(Scope_Stack
.Last
);
1758 Scope_Stack
.Locked
:= False;
1761 ------------------------
1762 -- Walk_Library_Items --
1763 ------------------------
1765 procedure Walk_Library_Items
is
1766 type Unit_Number_Set
is array (Main_Unit
.. Last_Unit
) of Boolean;
1767 pragma Pack
(Unit_Number_Set
);
1769 Main_CU
: constant Node_Id
:= Cunit
(Main_Unit
);
1770 Spec_CU
: Node_Id
:= Empty
;
1772 Seen
, Done
: Unit_Number_Set
:= (others => False);
1773 -- Seen (X) is True after we have seen unit X in the walk. This is used
1774 -- to prevent processing the same unit more than once. Done (X) is True
1775 -- after we have fully processed X, and is used only for debugging
1776 -- printouts and assertions.
1778 Do_Main
: Boolean := False;
1779 -- Flag to delay processing the main body until after all other units.
1780 -- This is needed because the spec of the main unit may appear in the
1781 -- context of some other unit. We do not want this to force processing
1782 -- of the main body before all other units have been processed.
1784 -- Another circularity pattern occurs when the main unit is a child unit
1785 -- and the body of an ancestor has a with-clause of the main unit or on
1786 -- one of its children. In both cases the body in question has a with-
1787 -- clause on the main unit, and must be excluded from the traversal. In
1788 -- some convoluted cases this may lead to a CodePeer error because the
1789 -- spec of a subprogram declared in an instance within the parent will
1790 -- not be seen in the main unit.
1792 function Depends_On_Main
(CU
: Node_Id
) return Boolean;
1793 -- The body of a unit that is withed by the spec of the main unit may in
1794 -- turn have a with_clause on that spec. In that case do not traverse
1795 -- the body, to prevent loops. It can also happen that the main body has
1796 -- a with_clause on a child, which of course has an implicit with on its
1797 -- parent. It's OK to traverse the child body if the main spec has been
1798 -- processed, otherwise we also have a circularity to avoid.
1800 procedure Do_Action
(CU
: Node_Id
; Item
: Node_Id
);
1801 -- Calls Action, with some validity checks
1803 procedure Do_Unit_And_Dependents
(CU
: Node_Id
; Item
: Node_Id
);
1804 -- Calls Do_Action, first on the units with'ed by this one, then on
1805 -- this unit. If it's an instance body, do the spec first. If it is
1806 -- an instance spec, do the body last.
1808 procedure Do_Withed_Unit
(Withed_Unit
: Node_Id
);
1809 -- Apply Do_Unit_And_Dependents to a unit in a context clause
1811 procedure Process_Bodies_In_Context
(Comp
: Node_Id
);
1812 -- The main unit and its spec may depend on bodies that contain generics
1813 -- that are instantiated in them. Iterate through the corresponding
1814 -- contexts before processing main (spec/body) itself, to process bodies
1815 -- that may be present, together with their context. The spec of main
1816 -- is processed wherever it appears in the list of units, while the body
1817 -- is processed as the last unit in the list.
1819 ---------------------
1820 -- Depends_On_Main --
1821 ---------------------
1823 function Depends_On_Main
(CU
: Node_Id
) return Boolean is
1825 MCU
: constant Node_Id
:= Unit
(Main_CU
);
1828 -- Problem does not arise with main subprograms
1830 if Nkind
(MCU
) not in N_Package_Body | N_Package_Declaration
then
1834 CL
:= First
(Context_Items
(CU
));
1836 while Present
(CL
) loop
1837 if Nkind
(CL
) = N_With_Clause
1838 and then Library_Unit
(CL
) = Main_CU
1839 and then not Done
(Get_Cunit_Unit_Number
(Library_Unit
(CL
)))
1848 end Depends_On_Main
;
1854 procedure Do_Action
(CU
: Node_Id
; Item
: Node_Id
) is
1856 -- This calls Action at the end. All the preceding code is just
1857 -- assertions and debugging output.
1859 pragma Assert
(No
(CU
) or else Nkind
(CU
) = N_Compilation_Unit
);
1861 case Nkind
(Item
) is
1862 when N_Generic_Function_Renaming_Declaration
1863 | N_Generic_Package_Declaration
1864 | N_Generic_Package_Renaming_Declaration
1865 | N_Generic_Procedure_Renaming_Declaration
1866 | N_Generic_Subprogram_Declaration
1867 | N_Package_Declaration
1868 | N_Package_Renaming_Declaration
1869 | N_Subprogram_Declaration
1870 | N_Subprogram_Renaming_Declaration
1876 when N_Package_Body
=>
1878 -- Package bodies are processed separately if the main unit
1883 when N_Subprogram_Body
=>
1885 -- A subprogram body must be the main unit
1887 pragma Assert
(Acts_As_Spec
(CU
) or else CU
= Main_CU
);
1890 when N_Function_Instantiation
1891 | N_Package_Instantiation
1892 | N_Procedure_Instantiation
1894 -- Can only happen if some generic body (needed for gnat2scil
1895 -- traversal, but not by GNAT) is not available, ignore.
1899 -- All other cases cannot happen
1902 pragma Assert
(False, "subunit");
1905 when N_Null_Statement
=>
1907 -- Do not call Action for an ignored ghost unit
1909 pragma Assert
(Is_Ignored_Ghost_Node
(Original_Node
(Item
)));
1913 pragma Assert
(False);
1917 if Present
(CU
) then
1918 pragma Assert
(Item
/= Stand
.Standard_Package_Node
);
1919 pragma Assert
(Item
= Unit
(CU
));
1922 Unit_Num
: constant Unit_Number_Type
:=
1923 Get_Cunit_Unit_Number
(CU
);
1925 procedure Assert_Done
(Withed_Unit
: Node_Id
);
1926 -- Assert Withed_Unit is already Done, unless it's a body. It
1927 -- might seem strange for a with_clause to refer to a body, but
1928 -- this happens in the case of a generic instantiation, which
1929 -- gets transformed into the instance body (and the instance
1930 -- spec is also created). With clauses pointing to the
1931 -- instantiation end up pointing to the instance body.
1937 procedure Assert_Done
(Withed_Unit
: Node_Id
) is
1939 if Withed_Unit
/= Main_CU
1940 and then not Done
(Get_Cunit_Unit_Number
(Withed_Unit
))
1942 -- N_Null_Statement will happen in case of a ghost unit
1943 -- which gets rewritten.
1945 if Nkind
(Unit
(Withed_Unit
)) not in
1946 N_Generic_Package_Declaration |
1948 N_Package_Renaming_Declaration |
1953 (Unit_Name
(Get_Cunit_Unit_Number
(Withed_Unit
)));
1954 Write_Str
(" not yet walked!");
1956 if Get_Cunit_Unit_Number
(Withed_Unit
) = Unit_Num
then
1957 Write_Str
(" (self-ref)");
1962 pragma Assert
(False);
1967 procedure Assert_Withed_Units_Done
is
1968 new Walk_Withs
(Assert_Done
);
1971 if Debug_Unit_Walk
then
1972 Write_Unit_Info
(Unit_Num
, Item
, Withs
=> True);
1975 -- Main unit should come last, except in the case where we
1976 -- skipped System_Aux_Id, in which case we missed the things it
1977 -- depends on, and in the case of parent bodies if present.
1980 (not Done
(Main_Unit
)
1981 or else Present
(System_Aux_Id
)
1982 or else Nkind
(Item
) = N_Package_Body
);
1984 -- We shouldn't do the same thing twice
1986 pragma Assert
(not Done
(Unit_Num
));
1988 -- Everything we depend upon should already be done
1991 (Assert_Withed_Units_Done
(CU
, Include_Limited
=> False));
1995 -- Must be Standard, which has no entry in the units table
1997 pragma Assert
(Item
= Stand
.Standard_Package_Node
);
1999 if Debug_Unit_Walk
then
2000 Write_Line
("Standard");
2007 --------------------
2008 -- Do_Withed_Unit --
2009 --------------------
2011 procedure Do_Withed_Unit
(Withed_Unit
: Node_Id
) is
2013 Do_Unit_And_Dependents
(Withed_Unit
, Unit
(Withed_Unit
));
2015 -- If the unit in the with_clause is a generic instance, the clause
2016 -- now denotes the instance body. Traverse the corresponding spec
2017 -- because there may be no other dependence that will force the
2018 -- traversal of its own context.
2020 if Nkind
(Unit
(Withed_Unit
)) = N_Package_Body
2021 and then Is_Generic_Instance
2022 (Defining_Entity
(Unit
(Library_Unit
(Withed_Unit
))))
2024 Do_Withed_Unit
(Library_Unit
(Withed_Unit
));
2028 ----------------------------
2029 -- Do_Unit_And_Dependents --
2030 ----------------------------
2032 procedure Do_Unit_And_Dependents
(CU
: Node_Id
; Item
: Node_Id
) is
2033 Unit_Num
: constant Unit_Number_Type
:= Get_Cunit_Unit_Number
(CU
);
2035 Body_U
: Unit_Number_Type
;
2036 Parent_CU
: Node_Id
;
2038 procedure Do_Withed_Units
is new Walk_Withs
(Do_Withed_Unit
);
2041 if not Seen
(Unit_Num
) then
2043 -- Process the with clauses
2045 Do_Withed_Units
(CU
, Include_Limited
=> False);
2047 -- Process the unit if it is a spec or the main unit, if it
2048 -- has no previous spec or we have done all other units.
2050 if Nkind
(Item
) not in N_Package_Body | N_Subprogram_Body
2051 or else Acts_As_Spec
(CU
)
2053 if CU
= Main_CU
and then not Do_Main
then
2054 Seen
(Unit_Num
) := False;
2057 Seen
(Unit_Num
) := True;
2059 if CU
= Library_Unit
(Main_CU
) then
2060 Process_Bodies_In_Context
(CU
);
2062 -- If main is a child unit, examine parent unit contexts
2063 -- to see if they include instantiated units. Also, if
2064 -- the parent itself is an instance, process its body
2065 -- because it may contain subprograms that are called
2066 -- in the main unit.
2068 if Is_Child_Unit
(Cunit_Entity
(Main_Unit
)) then
2069 Child
:= Cunit_Entity
(Main_Unit
);
2070 while Is_Child_Unit
(Child
) loop
2073 (Get_Cunit_Entity_Unit_Number
(Scope
(Child
)));
2074 Process_Bodies_In_Context
(Parent_CU
);
2076 if Nkind
(Unit
(Parent_CU
)) = N_Package_Body
2078 Nkind
(Original_Node
(Unit
(Parent_CU
)))
2079 = N_Package_Instantiation
2081 not Seen
(Get_Cunit_Unit_Number
(Parent_CU
))
2083 Body_U
:= Get_Cunit_Unit_Number
(Parent_CU
);
2084 Seen
(Body_U
) := True;
2085 Do_Action
(Parent_CU
, Unit
(Parent_CU
));
2086 Done
(Body_U
) := True;
2089 Child
:= Scope
(Child
);
2094 Do_Action
(CU
, Item
);
2095 Done
(Unit_Num
) := True;
2099 end Do_Unit_And_Dependents
;
2101 -------------------------------
2102 -- Process_Bodies_In_Context --
2103 -------------------------------
2105 procedure Process_Bodies_In_Context
(Comp
: Node_Id
) is
2107 Body_U
: Unit_Number_Type
;
2111 procedure Do_Withed_Units
is new Walk_Withs
(Do_Withed_Unit
);
2113 -- Start of processing for Process_Bodies_In_Context
2116 Clause
:= First
(Context_Items
(Comp
));
2117 while Present
(Clause
) loop
2118 if Nkind
(Clause
) = N_With_Clause
then
2119 Spec
:= Library_Unit
(Clause
);
2120 Body_CU
:= Library_Unit
(Spec
);
2122 -- If we are processing the spec of the main unit, load bodies
2123 -- only if the with_clause indicates that it forced the loading
2124 -- of the body for a generic instantiation. Note that bodies of
2125 -- parents that are instances have been loaded already.
2127 if Present
(Body_CU
)
2128 and then Body_CU
/= Main_CU
2129 and then Nkind
(Unit
(Body_CU
)) /= N_Subprogram_Body
2130 and then Nkind
(Unit
(Comp
)) /= N_Package_Declaration
2132 Body_U
:= Get_Cunit_Unit_Number
(Body_CU
);
2134 if not Seen
(Body_U
)
2135 and then not Depends_On_Main
(Body_CU
)
2137 Seen
(Body_U
) := True;
2138 Do_Withed_Units
(Body_CU
, Include_Limited
=> False);
2139 Do_Action
(Body_CU
, Unit
(Body_CU
));
2140 Done
(Body_U
) := True;
2147 end Process_Bodies_In_Context
;
2149 -- Local Declarations
2153 -- Start of processing for Walk_Library_Items
2156 if Debug_Unit_Walk
then
2157 Write_Line
("Walk_Library_Items:");
2161 -- Do Standard first, then walk the Comp_Unit_List
2163 Do_Action
(Empty
, Standard_Package_Node
);
2165 -- First place the context of all instance bodies on the corresponding
2166 -- spec, because it may be needed to analyze the code at the place of
2167 -- the instantiation.
2169 Cur
:= First_Elmt
(Comp_Unit_List
);
2170 while Present
(Cur
) loop
2172 CU
: constant Node_Id
:= Node
(Cur
);
2173 N
: constant Node_Id
:= Unit
(CU
);
2176 if Nkind
(N
) = N_Package_Body
2177 and then Is_Generic_Instance
(Defining_Entity
(N
))
2180 (Context_Items
(CU
), Context_Items
(Library_Unit
(CU
)));
2187 -- Now traverse compilation units (specs) in order
2189 Cur
:= First_Elmt
(Comp_Unit_List
);
2190 while Present
(Cur
) loop
2192 CU
: constant Node_Id
:= Node
(Cur
);
2193 N
: constant Node_Id
:= Unit
(CU
);
2197 pragma Assert
(Nkind
(CU
) = N_Compilation_Unit
);
2201 -- If it is a subprogram body, process it if it has no
2204 -- If it's a package body, ignore it, unless it is a body
2205 -- created for an instance that is the main unit. In the case
2206 -- of subprograms, the body is the wrapper package. In case of
2207 -- a package, the original file carries the body, and the spec
2208 -- appears as a later entry in the units list.
2210 -- Otherwise bodies appear in the list only because of inlining
2211 -- or instantiations, and they are processed only if relevant.
2212 -- The flag Withed_Body on a context clause indicates that a
2213 -- unit contains an instantiation that may be needed later,
2214 -- and therefore the body that contains the generic body (and
2215 -- its context) must be traversed immediately after the
2216 -- corresponding spec (see Do_Unit_And_Dependents).
2218 -- The main unit itself is processed separately after all other
2219 -- specs, and relevant bodies are examined in Process_Main.
2221 when N_Subprogram_Body
=>
2222 if Acts_As_Spec
(N
) then
2223 Do_Unit_And_Dependents
(CU
, N
);
2226 when N_Package_Body
=>
2228 and then Nkind
(Original_Node
(Unit
(Main_CU
))) in
2229 N_Generic_Instantiation
2230 and then Present
(Library_Unit
(Main_CU
))
2232 Do_Unit_And_Dependents
2233 (Library_Unit
(Main_CU
),
2234 Unit
(Library_Unit
(Main_CU
)));
2237 -- It is a spec, process it, and the units it depends on,
2238 -- unless it is a descendant of the main unit. This can happen
2239 -- when the body of a parent depends on some other descendant.
2241 when N_Null_Statement
=>
2243 -- Ignore an ignored ghost unit
2245 pragma Assert
(Is_Ignored_Ghost_Node
(Original_Node
(N
)));
2250 -- Skip spec of main unit for now, we want to process it
2251 -- after all other specs.
2253 if Nkind
(Unit
(CU
)) = N_Package_Declaration
2254 and then Library_Unit
(CU
) = Main_CU
2255 and then CU
/= Main_CU
2259 Par
:= Scope
(Defining_Entity
(Unit
(CU
)));
2261 if Is_Child_Unit
(Defining_Entity
(Unit
(CU
))) then
2263 and then Par
/= Standard_Standard
2264 and then Par
/= Cunit_Entity
(Main_Unit
)
2270 if Par
/= Cunit_Entity
(Main_Unit
) then
2271 Do_Unit_And_Dependents
(CU
, N
);
2280 -- Now process main package spec if skipped
2282 if Present
(Spec_CU
) then
2283 Do_Unit_And_Dependents
(Spec_CU
, Unit
(Spec_CU
));
2286 -- Now process package bodies on which main depends, followed by bodies
2287 -- of parents, if present, and finally main itself.
2289 if not Done
(Main_Unit
) then
2292 Process_Main
: declare
2293 Parent_CU
: Node_Id
;
2295 Body_U
: Unit_Number_Type
;
2298 function Is_Subunit_Of_Main
(U
: Node_Id
) return Boolean;
2299 -- If the main unit has subunits, their context may include
2300 -- bodies that are needed in the body of main. We must examine
2301 -- the context of the subunits, which are otherwise not made
2302 -- explicit in the main unit.
2304 ------------------------
2305 -- Is_Subunit_Of_Main --
2306 ------------------------
2308 function Is_Subunit_Of_Main
(U
: Node_Id
) return Boolean is
2312 if Present
(U
) and then Nkind
(Unit
(U
)) = N_Subunit
then
2313 Lib
:= Library_Unit
(U
);
2314 return Lib
= Main_CU
or else Is_Subunit_Of_Main
(Lib
);
2318 end Is_Subunit_Of_Main
;
2320 -- Start of processing for Process_Main
2323 Process_Bodies_In_Context
(Main_CU
);
2325 for Unit_Num
in Done
'Range loop
2326 if Is_Subunit_Of_Main
(Cunit
(Unit_Num
)) then
2327 Process_Bodies_In_Context
(Cunit
(Unit_Num
));
2331 -- If the main unit is a child unit, parent bodies may be present
2332 -- because they export instances or inlined subprograms. Check for
2333 -- presence of these, which are not present in context clauses.
2334 -- Note that if the parents are instances, their bodies have been
2335 -- processed before the main spec, because they may be needed
2336 -- therein, so the following loop only affects non-instances.
2338 if Is_Child_Unit
(Cunit_Entity
(Main_Unit
)) then
2339 Child
:= Cunit_Entity
(Main_Unit
);
2340 while Is_Child_Unit
(Child
) loop
2342 Cunit
(Get_Cunit_Entity_Unit_Number
(Scope
(Child
)));
2343 Body_CU
:= Library_Unit
(Parent_CU
);
2345 if Present
(Body_CU
)
2346 and then not Seen
(Get_Cunit_Unit_Number
(Body_CU
))
2347 and then not Depends_On_Main
(Body_CU
)
2349 Body_U
:= Get_Cunit_Unit_Number
(Body_CU
);
2350 Seen
(Body_U
) := True;
2351 Do_Action
(Body_CU
, Unit
(Body_CU
));
2352 Done
(Body_U
) := True;
2355 Child
:= Scope
(Child
);
2359 Do_Action
(Main_CU
, Unit
(Main_CU
));
2360 Done
(Main_Unit
) := True;
2364 if Debug_Unit_Walk
then
2365 if Done
/= (Done
'Range => True) then
2367 Write_Line
("Ignored units:");
2371 for Unit_Num
in Done
'Range loop
2372 if not Done
(Unit_Num
) then
2374 -- Units with configuration pragmas (.ads files) have empty
2375 -- compilation-unit nodes; skip printing info about them.
2377 if Present
(Cunit
(Unit_Num
)) then
2379 (Unit_Num
, Unit
(Cunit
(Unit_Num
)), Withs
=> True);
2388 pragma Assert
(Done
(Main_Unit
));
2390 if Debug_Unit_Walk
then
2392 Write_Line
("end Walk_Library_Items.");
2394 end Walk_Library_Items
;
2400 procedure Walk_Withs
(CU
: Node_Id
; Include_Limited
: Boolean) is
2401 pragma Assert
(Nkind
(CU
) = N_Compilation_Unit
);
2402 pragma Assert
(Nkind
(Unit
(CU
)) /= N_Subunit
);
2404 procedure Walk_Immediate
is new Walk_Withs_Immediate
(Action
);
2407 -- First walk the withs immediately on the library item
2409 Walk_Immediate
(CU
, Include_Limited
);
2411 -- For a body, we must also check for any subunits which belong to it
2412 -- and which have context clauses of their own, since these with'ed
2413 -- units are part of its own dependencies.
2415 if Nkind
(Unit
(CU
)) in N_Unit_Body
then
2416 for S
in Main_Unit
.. Last_Unit
loop
2418 -- We are only interested in subunits. For preproc. data and def.
2419 -- files, Cunit is Empty, so we need to test that first.
2421 if Cunit
(S
) /= Empty
2422 and then Nkind
(Unit
(Cunit
(S
))) = N_Subunit
2428 Pnode
:= Library_Unit
(Cunit
(S
));
2430 -- In -gnatc mode, the errors in the subunits will not have
2431 -- been recorded, but the analysis of the subunit may have
2432 -- failed, so just quit.
2438 -- Find ultimate parent of the subunit
2440 while Nkind
(Unit
(Pnode
)) = N_Subunit
loop
2441 Pnode
:= Library_Unit
(Pnode
);
2444 -- See if it belongs to current unit, and if so, include its
2445 -- with_clauses. Do not process main unit prematurely.
2447 if Pnode
= CU
and then CU
/= Cunit
(Main_Unit
) then
2448 Walk_Immediate
(Cunit
(S
), Include_Limited
);
2456 --------------------------
2457 -- Walk_Withs_Immediate --
2458 --------------------------
2460 procedure Walk_Withs_Immediate
(CU
: Node_Id
; Include_Limited
: Boolean) is
2461 pragma Assert
(Nkind
(CU
) = N_Compilation_Unit
);
2463 Context_Item
: Node_Id
;
2467 Context_Item
:= First
(Context_Items
(CU
));
2468 while Present
(Context_Item
) loop
2469 if Nkind
(Context_Item
) = N_With_Clause
2470 and then (Include_Limited
2471 or else not Limited_Present
(Context_Item
))
2473 Lib_Unit
:= Library_Unit
(Context_Item
);
2477 Next
(Context_Item
);
2479 end Walk_Withs_Immediate
;