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| author | Erik Pilkington <erik.pilkington@gmail.com> | 2019-01-18 21:33:23 +0000 |
|---|---|---|
| committer | Erik Pilkington <erik.pilkington@gmail.com> | 2019-01-18 21:33:23 +0000 |
| commit | 14d47cfd494a41176bee0442e6c15dbbc85f1f95 (patch) | |
| tree | 36176b06ef7ecddf9e1d4c4b1a5e110fefb58531 /clang/test/Sema/fixed-enum.c | |
| parent | bd3a5b29cb809fc6117569a2801d41c1d12dfe9a (diff) | |
| download | bcm5719-llvm-14d47cfd494a41176bee0442e6c15dbbc85f1f95.tar.gz bcm5719-llvm-14d47cfd494a41176bee0442e6c15dbbc85f1f95.zip | |
[Sema] Suppress a warning about a forward-declared fixed enum in C mode
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
Diffstat (limited to 'clang/test/Sema/fixed-enum.c')
| -rw-r--r-- | clang/test/Sema/fixed-enum.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/clang/test/Sema/fixed-enum.c b/clang/test/Sema/fixed-enum.c index 60a4bc474f7..c77f5b0cbe7 100644 --- a/clang/test/Sema/fixed-enum.c +++ b/clang/test/Sema/fixed-enum.c @@ -2,6 +2,7 @@ // 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}; @@ -10,9 +11,29 @@ enum X : int {e}; #elif defined(CXX03) // expected-warning@-4{{enumeration types with a fixed underlying type are a C++11 extension}} #elif defined(OBJC) -// expected-no-diagnostics +// 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')}} |
