[clang] [Clang] Introduce OverflowBehaviorType for fine-grained overflow control (PR #148914)

[Eli Friedman via cfe-commits]

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@@ -405,6 +405,9 @@ ArgType::matchesType(ASTContext &C, QualType argTy) const {
     argTy = PT->getPointeeType();
   }
 
+  if (const auto *OBT = argTy->getAs<OverflowBehaviorType>())
+    argTy = OBT->getUnderlyingType();
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efriedma-quic wrote:

Probably the documentation should mention this is allowed.

https://github.com/llvm/llvm-project/pull/148914