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14d47cfd49
As of r343360, we support fixed-enums in C. This lead to some warnings in project headers where a fixed enum is forward declared then later defined. In C++, this is fine, the forward declaration is treated as a complete type even though the definition isn't present. We use this rule in C too, but still warn about the forward declaration anyways. This patch suppresses the warning. rdar://problem/47356469 Differential revision: https://reviews.llvm.org/D56879 llvm-svn: 351595
40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
// RUN: %clang_cc1 -Weverything -xc++ -std=c++11 -DCXX11 -verify %s
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// RUN: %clang_cc1 -Weverything -xc++ -std=c++03 -DCXX03 -verify %s
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// RUN: %clang_cc1 -Weverything -xobjective-c -DOBJC -verify %s
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// RUN: %clang_cc1 -Weverything -std=c11 -xc -DC11 -verify %s
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// RUN: %clang_cc1 -pedantic -std=c11 -xc -DC11 -verify %s
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// RUN: %clang_cc1 -Weverything -std=c11 -xc -fms-extensions -DMS -verify %s
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enum X : int {e};
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#if defined(CXX11)
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// expected-warning@-2{{enumeration types with a fixed underlying type are incompatible with C++98}}
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#elif defined(CXX03)
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// expected-warning@-4{{enumeration types with a fixed underlying type are a C++11 extension}}
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#elif defined(OBJC)
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// No diagnostic
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#elif defined(C11)
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// expected-warning@-8{{enumeration types with a fixed underlying type are a Clang extension}}
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#elif defined(MS)
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// expected-warning@-10{{enumeration types with a fixed underlying type are a Microsoft extension}}
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#endif
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// Don't warn about the forward declaration in any language mode.
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enum Fwd : int;
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enum Fwd : int { e2 };
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#ifndef OBJC
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// expected-warning@-3 {{enumeration types with a fixed underlying type}}
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// expected-warning@-3 {{enumeration types with a fixed underlying type}}
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#endif
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// Always error on the incompatible redeclaration.
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enum BadFwd : int;
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#ifndef OBJC
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// expected-warning@-2 {{enumeration types with a fixed underlying type}}
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#endif
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// expected-note@-4 {{previous declaration is here}}
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enum BadFwd : char { e3 };
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#ifndef OBJC
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// expected-warning@-2 {{enumeration types with a fixed underlying type}}
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#endif
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// expected-error@-4 {{enumeration redeclared with different underlying type 'char' (was 'int')}}
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