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* [gcc r12-1497] [Ada] Raise expressions and unconstrained components
@ 2021-06-16 8:44 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2021-06-16 8:44 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:331170392082ccfb782a6edb263fc2a32d058c70
commit r12-1497-g331170392082ccfb782a6edb263fc2a32d058c70
Author: Arnaud Charlet <charlet@adacore.com>
Date: Wed Feb 17 06:29:03 2021 -0500
[Ada] Raise expressions and unconstrained components
gcc/ada/
* sem_ch3.adb (Analyze_Component_Declaration): Do not special
case raise expressions.
gcc/testsuite/
* gnat.dg/limited4.adb: Disable illegal code.
Diff:
---
gcc/ada/sem_ch3.adb | 13 +------------
gcc/testsuite/gnat.dg/limited4.adb | 13 +++++++------
2 files changed, 8 insertions(+), 18 deletions(-)
diff --git a/gcc/ada/sem_ch3.adb b/gcc/ada/sem_ch3.adb
index 03280e5244e..c6687b51c3b 100644
--- a/gcc/ada/sem_ch3.adb
+++ b/gcc/ada/sem_ch3.adb
@@ -2083,21 +2083,10 @@ package body Sem_Ch3 is
end if;
end if;
- -- Avoid reporting spurious errors if the component is initialized with
- -- a raise expression (which is legal in any expression context)
-
- if Present (E)
- and then
- (Nkind (E) = N_Raise_Expression
- or else (Nkind (E) = N_Qualified_Expression
- and then Nkind (Expression (E)) = N_Raise_Expression))
- then
- null;
-
-- The parent type may be a private view with unknown discriminants,
-- and thus unconstrained. Regular components must be constrained.
- elsif not Is_Definite_Subtype (T)
+ if not Is_Definite_Subtype (T)
and then Chars (Id) /= Name_uParent
then
if Is_Class_Wide_Type (T) then
diff --git a/gcc/testsuite/gnat.dg/limited4.adb b/gcc/testsuite/gnat.dg/limited4.adb
index 1a8ec97f91c..2a22a2c1b3f 100644
--- a/gcc/testsuite/gnat.dg/limited4.adb
+++ b/gcc/testsuite/gnat.dg/limited4.adb
@@ -22,11 +22,12 @@ procedure Limited4 is
Obj2 : Lim_Tagged'Class := Lim_Tagged'Class'(raise TBD_Error);
-- b) initialization expression of a CW component_declaration
-
- type Rec is record
- Comp01 : Lim_Tagged'Class := (raise TBD_Error);
- Comp02 : Lim_Tagged'Class := Lim_Tagged'Class'((raise TBD_Error));
- end record;
+ -- ... is illegal: cannot have unconstrained components.
+ --
+ -- type Rec is record
+ -- Comp01 : Lim_Tagged'Class := (raise TBD_Error);
+ -- Comp02 : Lim_Tagged'Class := Lim_Tagged'Class'((raise TBD_Error));
+ -- end record;
-- c) the expression of a record_component_association
@@ -55,4 +56,4 @@ procedure Limited4 is
begin
Check := Do_Test1 (raise TBD_Error);
Check := Do_Test2;
-end;
\ No newline at end of file
+end;
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