[clang] [Clang] Add diagnostic when scoped enumeration requires an explicit conversion for binary operations (PR #152698)

[Erich Keane via cfe-commits]

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@@ -13,6 +13,7 @@ enum class E { e };
 
 template<typename T> int f(T t) { return ~t; } // expected-error {{invalid argument type}}
 template<typename T, typename U> int f(T t, U u) { return t % u; } // expected-error {{invalid operands to}}
+                                                                   // expected-note at -1 {{no implicit conversion for scoped enum}}
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erichkeane wrote:

Unrelated change.

https://github.com/llvm/llvm-project/pull/152698