================
@@ -7567,9 +7567,13 @@ def warn_arith_conv_mixed_enum_types_cxx20 : Warning<
"%sub{select_arith_conv_kind}0 "
"different enumeration types%diff{ ($ and $)|}1,2 is deprecated">,
InGroup<DeprecatedEnumEnumConversion>;
-def err_conv_mixed_enum_types_cxx26 : Error<
+
+def err_conv_mixed_enum_types: Error <
"invalid %sub{select_arith_conv_kind}0 "
"different enumeration types%diff{ ($ and $)|}1,2">;
+def warn_conv_mixed_enum_types_cxx26 : Warning <
+ err_conv_mixed_enum_types.Summary>,
+ InGroup<EnumEnumConversion>, DefaultError;
----------------
AaronBallman wrote:
I don't know of a reliable way to ensure the diagnostic is at the end of the
list. I think putting it at the end of DiagnosticSemaKinds.td will suffice (we
allocate diagnostic IDs in blocks based on the .td file they're in). However,
I'm not certain that's a guarantee.
Perhaps we don't backport this?
https://github.com/llvm/llvm-project/pull/131853
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