From: Justin Squirek <squi...@adacore.com>
This patch adds the restriction on 'Super such that it cannot apply to objects
whose parent type is an interface.
gcc/ada/
* sem_attr.adb (Analyze_Attribute): Add check for interface parent
types.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/sem_attr.adb | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/gcc/ada/sem_attr.adb b/gcc/ada/sem_attr.adb
index 4fd270aeae9..2fd95f36d65 100644
--- a/gcc/ada/sem_attr.adb
+++ b/gcc/ada/sem_attr.adb
@@ -6683,6 +6683,12 @@ package body Sem_Attr is
elsif Depends_On_Private (P_Type) then
Error_Attr_P ("prefix type of % is a private extension");
+ -- Disallow view conversions to interfaces in order to avoid
+ -- depending on whether an interface type is used as a parent
+ -- or progenitor type.
+
+ elsif Is_Interface (Node (First_Elmt (Parents))) then
+ Error_Attr_P ("type of % cannot be an interface");
end if;
-- Generate a view conversion and analyze it
--
2.45.1
