@@ -4237,12 +4237,13 @@ package body Exp_Attr is
-- type if the type lacks default discriminant values.
if Is_Unchecked_Union (Base_Type (U_Type))
- and then No (Discriminant_Constraint (U_Type))
+ and then
+ No (Discriminant_Default_Value (First_Discriminant (U_Type)))
then
- Insert_Action (N,
+ Rewrite (N,
Make_Raise_Program_Error (Loc,
Reason => PE_Unchecked_Union_Restriction));
-
+ Set_Etype (N, B_Type);
return;
end if;
@@ -5332,12 +5333,13 @@ package body Exp_Attr is
-- values.
if Is_Unchecked_Union (Base_Type (U_Type))
- and then No (Discriminant_Constraint (U_Type))
+ and then
+ No (Discriminant_Default_Value (First_Discriminant (U_Type)))
then
- Insert_Action (N,
+ Rewrite (N,
Make_Raise_Program_Error (Loc,
Reason => PE_Unchecked_Union_Restriction));
-
+ Set_Etype (N, Standard_Void_Type);
return;
end if;
@@ -44,8 +44,8 @@
-- till the freeze point in this case.
-- 3. Set the Others_Discrete_Choices list for an others choice. This is
+-- used in various ways, e.g. to construct the discriminant checking
+-- function for the case of a variant with an others choice.
-- 4. In the case of static predicates, we need to expand out choices that
-- correspond to the predicate for the back end. This expansion destroys