[Clang] Diagnose ill-formed constant expression when setting a non fixed enum to a value outside the range of the enumeration values

DR2338 clarified that it was undefined behavior to set the value outside the
range of the enumerations values for an enum without a fixed underlying type.

We should diagnose this with a constant expression context.

Differential Revision: https://reviews.llvm.org/D130058

1 files changed, 2 insertions, 2 deletions

diff --git a/cross-project-tests/debuginfo-tests/clang_llvm_roundtrip/simplified_template_names.cpp b/cross-project-tests/debuginfo-tests/clang_llvm_roundtrip/simplified_template_names.cpp
index 3990c2809e2e..6b2807ccaf13 100644
--- a/cross-project-tests/debuginfo-tests/clang_llvm_roundtrip/simplified_template_names.cpp
+++ b/cross-project-tests/debuginfo-tests/clang_llvm_roundtrip/simplified_template_names.cpp
@@ -25,9 +25,9 @@ struct udt { };
 }
 template<template<typename> class T>
 void ttp_user() { }
-enum Enumeration { Enumerator1, Enumerator2, Enumerator3 = 1 };
+enum Enumeration : int { Enumerator1, Enumerator2, Enumerator3 = 1 };
 enum class EnumerationClass { Enumerator1, Enumerator2, Enumerator3 = 1 };
-enum { AnonEnum1, AnonEnum2, AnonEnum3 = 1 };
+enum : int { AnonEnum1, AnonEnum2, AnonEnum3 = 1 };
 enum EnumerationSmall : unsigned char { kNeg = 0xff };
 }
 template <typename... Ts>