forked from OSchip/llvm-project
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
// 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}}
|
|
|
|
namespace test2 {
|
|
// FIXME: we should probably suppress the first warning as the second one
|
|
// is more precise.
|
|
// For now this tests that a second 'extern "C"' is not necessary to trigger
|
|
// the warning.
|
|
struct A;
|
|
extern "C" A f(void); // expected-warning {{'f' has C-linkage specified, but returns incomplete type 'test2::A' which could be incompatible with C}}
|
|
struct A {
|
|
A(const A&);
|
|
};
|
|
A f(void); // expected-warning {{'f' has C-linkage specified, but returns user-defined type 'test2::A' which is incompatible with C}}
|
|
}
|