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// RUN: %clang_cc1 -fsyntax-only -verify %s
extern "C" { void f(bool); }
namespace std {
using ::f;
inline void f() { return f(true); }
}
namespace M {
void f(float);
}
namespace N {
using M::f;
void f(int) { } // expected-note{{previous}}
void f(int) { } // expected-error{{redefinition}}
}
namespace N {
void f(double);
void f(long);
}
struct X0 {
void operator()(int);
void operator()(long);
};
struct X1 : X0 {
// FIXME: give this operator() a 'float' parameter to test overloading
// behavior. It currently fails.
void operator()();
using X0::operator();
void test() {
(*this)(1);
}
};
struct A { void f(); };
struct B : A { };
class C : B { using B::f; };
// PR5751: Resolve overloaded functions through using decls.
namespace O {
void f(int i);
void f(double d);
}
namespace P {
void f();
void g(void (*ptr)(int));
using O::f;
void test() {
f();
f(1);
void (*f_ptr1)(double) = f;
void (*f_ptr2)() = f;
g(f);
}
}
// Make sure that ADL can find names brought in by using decls.
namespace test0 {
namespace ns {
class Foo {};
namespace inner {
void foo(char *); // expected-note {{no known conversion}}
}
using inner::foo;
}
void test(ns::Foo *p) {
foo(*p); // expected-error {{no matching function for call to 'foo'}}
}
}
// Redeclarations!
namespace test1 {
namespace ns0 { struct Foo {}; }
namespace A { void foo(ns0::Foo *p, int y, int z); }
namespace ns2 { using A::foo; }
namespace ns1 { struct Bar : ns0::Foo {}; }
namespace A { void foo(ns0::Foo *p, int y, int z = 0); } // expected-note {{candidate}}
namespace ns1 { using A::foo; }
namespace ns2 { struct Baz : ns1::Bar {}; }
namespace A { void foo(ns0::Foo *p, int y = 0, int z); }
void test(ns2::Baz *p) {
foo(p, 0, 0); // okay!
foo(p, 0); // should be fine!
foo(p); // expected-error {{no matching function}}
}
}
namespace test2 {
namespace ns { int foo; }
template <class T> using ns::foo; // expected-error {{cannot template a using declaration}}
// PR8022
struct A {
template <typename T> void f(T);
};
class B : A {
template <typename T> using A::f<T>; // expected-error {{cannot template a using declaration}}
};
}
// PR8756
namespace foo
{
class Class1; // expected-note{{forward declaration}}
class Class2
{
using ::foo::Class1::Function; // expected-error{{incomplete type 'foo::Class1' named in nested name specifier}}
};
}
// Don't suggest non-typenames for positions requiring typenames.
namespace using_suggestion_tyname_val {
namespace N { void FFF() {} }
using typename N::FFG; // expected-error {{no member named 'FFG' in namespace 'using_suggestion_tyname_val::N'}}
}
namespace using_suggestion_member_tyname_val {
class CCC { public: void AAA() { } };
class DDD : public CCC { public: using typename CCC::AAB; }; // expected-error {{no member named 'AAB' in 'using_suggestion_member_tyname_val::CCC'}}
}
namespace using_suggestion_tyname_val_dropped_specifier {
void FFF() {}
namespace N { }
using typename N::FFG; // expected-error {{no member named 'FFG' in namespace 'using_suggestion_tyname_val_dropped_specifier::N'}}
}
// Currently hints aren't provided to drop out the incorrect M::.
namespace using_suggestion_ty_dropped_nested_specifier {
namespace N {
class AAA {}; // expected-note {{'N::AAA' declared here}}
namespace M { }
}
using N::M::AAA; // expected-error {{no member named 'AAA' in namespace 'using_suggestion_ty_dropped_nested_specifier::N::M'; did you mean 'N::AAA'?}}
}
namespace using_suggestion_tyname_ty_dropped_nested_specifier {
namespace N {
class AAA {}; // expected-note {{'N::AAA' declared here}}
namespace M { }
}
using typename N::M::AAA; // expected-error {{no member named 'AAA' in namespace 'using_suggestion_tyname_ty_dropped_nested_specifier::N::M'; did you mean 'N::AAA'?}}
}
namespace using_suggestion_val_dropped_nested_specifier {
namespace N {
void FFF() {} // expected-note {{'N::FFF' declared here}}
namespace M { }
}
using N::M::FFF; // expected-error {{no member named 'FFF' in namespace 'using_suggestion_val_dropped_nested_specifier::N::M'; did you mean 'N::FFF'?}}
}
namespace UsingDeclVsHiddenName {
namespace A {
enum HiddenTag1 {}; // expected-note {{previous use is here}}
enum HiddenTag2 {}; // expected-note {{target}}
int HiddenFn1; // expected-note {{target}}
int HiddenFn2; // expected-note {{target}}
int HiddenLocalExtern1;
int HiddenLocalExtern2;
}
namespace B {
using A::HiddenTag1;
using A::HiddenFn1; // expected-note {{using declaration}}
using A::HiddenLocalExtern1;
struct S {
friend struct HiddenTag1; // expected-error {{tag type that does not match previous}}
friend struct HiddenTag2; // expected-note {{conflicting declaration}}
friend void HiddenFn1(); // expected-error {{cannot befriend target of using declaration}}
friend void HiddenFn2(); // expected-note {{conflicting declaration}}
void f() {
// OK, these are not in the scope of namespace B, even though they're
// members of the namespace.
void HiddenLocalExtern1();
void HiddenLocalExtern2();
}
};
using A::HiddenTag2; // expected-error {{conflicts with declaration already in scope}}
using A::HiddenFn2; // expected-error {{conflicts with declaration already in scope}}
using A::HiddenLocalExtern2;
}
}
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