| // RUN: %clang_cc1 -Wreturn-type -fsyntax-only -std=c++11 -verify %s |
| |
| class A { |
| public: |
| A(const A&); |
| }; |
| |
| struct S { |
| int i; |
| double d; |
| |
| virtual void B() {} |
| }; |
| |
| union U { |
| struct { |
| int i; |
| virtual void B() {} // Can only do this in C++11 |
| } t; |
| }; |
| |
| struct S2 { |
| int i; |
| double d; |
| }; |
| |
| extern "C" U f3( void ); // expected-warning {{'f3' has C-linkage specified, but returns user-defined type 'U' which is incompatible with C}} |
| extern "C" S f0(void); // expected-warning {{'f0' has C-linkage specified, but returns user-defined type 'S' which is incompatible with C}} |
| extern "C" A f4( void ); // expected-warning {{'f4' has C-linkage specified, but returns user-defined type 'A' which is incompatible with C}} |
| |
| // These should all be fine |
| extern "C" S2 f5( void ); |
| extern "C" void f2( A x ); |
| extern "C" void f6( S s ); |
| extern "C" void f7( U u ); |
| extern "C" double f8(void); |
| extern "C" long long f11( void ); |
| extern "C" A *f10( void ); |
| |
| extern "C" struct mypodstruct f12(); // expected-warning {{'f12' has C-linkage specified, but returns incomplete type 'struct mypodstruct' which could be incompatible with C}} |
