================
@@ -17152,6 +17152,13 @@ bool Sema::CheckEnumUnderlyingType(TypeSourceInfo *TI)
{
SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc();
QualType T = TI->getType();
+ // C++0x 7.2p2: The type-specifier-seq of an enum-base shall name an
+ // integral type; any cv-qualification is ignored.
+ // C23 6.7.3.3p5: The underlying type of the enumeration is the unqualified,
+ // non-atomic version of the type specified by the type specifiers in the
+ // specifier qualifier list.
+ T = T.getAtomicUnqualifiedType();
+
----------------
cor3ntin wrote:
Is there a reason this is done before checking for isDependentType?
If not, it would be better to do that after the following lines
https://github.com/llvm/llvm-project/pull/147802
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