From: Piotr Trojanek <troja...@adacore.com>
Attribute Initialized is expanded into Valid_Scalars, which can't work
on unchecked unions, so Initialized on unchecked unions needs to be
rejected before expansion.
gcc/ada/
* sem_attr.adb (Analyze_Attribute): Reject attribute Initialized
on unchecked unions; fix grammar in comment.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/sem_attr.adb | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/gcc/ada/sem_attr.adb b/gcc/ada/sem_attr.adb
index a9e64b7655d..77c56aa587b 100644
--- a/gcc/ada/sem_attr.adb
+++ b/gcc/ada/sem_attr.adb
@@ -4613,7 +4613,7 @@ package body Sem_Attr is
if Comes_From_Source (N) then
- -- This attribute be prefixed with references to objects or
+ -- This attribute can be prefixed with references to objects or
-- values (such as a current instance value given within a type
-- or subtype aspect).
@@ -4621,6 +4621,13 @@ package body Sem_Attr is
and then not Is_Current_Instance_Reference_In_Type_Aspect (P)
then
Error_Attr_P ("prefix of % attribute must be object");
+
+ -- Just like attribute 'Valid_Scalars this attribute is illegal
+ -- on unchecked union types.
+
+ elsif Has_Unchecked_Union (Validated_View (P_Type)) then
+ Error_Attr_P
+ ("attribute % not allowed for Unchecked_Union type");
end if;
end if;
--
2.40.0
