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// RUN: %clang_cc1 -verify -std=c++1y %s
// Example from the standard.
namespace X {
void p() {
q(); // expected-error {{undeclared}}
extern void q();
}
void middle() {
q(); // expected-error {{undeclared}}
}
void q() { /*...*/ }
void bottom() {
q();
}
}
int q();
namespace Test1 {
void f() {
extern int a; // expected-note {{previous}}
int g(void); // expected-note {{previous}}
}
double a; // expected-error {{different type: 'double' vs 'int'}}
double g(); // expected-error {{differ only in their return type}}
}
namespace Test2 {
void f() {
extern int a; // expected-note {{previous}}
int g(void); // expected-note {{previous}}
}
void h() {
extern double a; // expected-error {{different type: 'double' vs 'int'}}
double g(void); // expected-error {{differ only in their return type}}
}
}
namespace Test3 {
constexpr void (*f())() {
void h();
return &h;
}
constexpr void (*g())() {
void h();
return &h;
}
static_assert(f() == g(), "");
}
namespace Test4 {
template<typename T>
constexpr void (*f())() {
void h();
return &h;
}
static_assert(f<int>() == f<char>(), "");
void h();
static_assert(f<int>() == &h, "");
}
namespace Test5 {
constexpr auto f() -> void (*)() {
void g();
struct X {
friend void g();
static constexpr auto h() -> void (*)() { return g; }
};
return X::h();
}
void g();
static_assert(f() == g, "");
}
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