fixed-enum.c
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// RUN: %clang_cc1 -Weverything -xc++ -std=c++11 -DCXX11 -verify %s
// RUN: %clang_cc1 -Weverything -xc++ -std=c++03 -DCXX03 -verify %s
// RUN: %clang_cc1 -Weverything -xobjective-c -DOBJC -verify %s
// RUN: %clang_cc1 -Weverything -std=c11 -xc -DC11 -verify %s
// RUN: %clang_cc1 -pedantic -std=c11 -xc -DC11 -verify %s
// RUN: %clang_cc1 -Weverything -std=c11 -xc -fms-extensions -DMS -verify %s
enum X : int {e};
#if defined(CXX11)
// expected-warning@-2{{enumeration types with a fixed underlying type are incompatible with C++98}}
#elif defined(CXX03)
// expected-warning@-4{{enumeration types with a fixed underlying type are a C++11 extension}}
#elif defined(OBJC)
// No diagnostic
#elif defined(C11)
// expected-warning@-8{{enumeration types with a fixed underlying type are a Clang extension}}
#elif defined(MS)
// expected-warning@-10{{enumeration types with a fixed underlying type are a Microsoft extension}}
#endif
// Don't warn about the forward declaration in any language mode.
enum Fwd : int;
enum Fwd : int { e2 };
#ifndef OBJC
// expected-warning@-3 {{enumeration types with a fixed underlying type}}
// expected-warning@-3 {{enumeration types with a fixed underlying type}}
#endif
// Always error on the incompatible redeclaration.
enum BadFwd : int;
#ifndef OBJC
// expected-warning@-2 {{enumeration types with a fixed underlying type}}
#endif
// expected-note@-4 {{previous declaration is here}}
enum BadFwd : char { e3 };
#ifndef OBJC
// expected-warning@-2 {{enumeration types with a fixed underlying type}}
#endif
// expected-error@-4 {{enumeration redeclared with different underlying type 'char' (was 'int')}}