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// RUN: %clang_cc1 -fsyntax-only -verify %s
// C++03 [namespace.udecl]p12:
// When a using-declaration brings names from a base class into a
// derived class scope, member functions in the derived class
// override and/or hide member functions with the same name and
// parameter types in a base class (rather than conflicting).
template <unsigned n> struct Opaque {};
template <unsigned n> void expect(Opaque<n> _) {}
// PR5727
// This just shouldn't crash.
namespace test0 {
template<typename> struct RefPtr { };
template<typename> struct PtrHash {
static void f() { }
};
template<typename T> struct PtrHash<RefPtr<T> > : PtrHash<T*> {
using PtrHash<T*>::f;
static void f() { f(); }
};
}
// Simple hiding.
namespace test1 {
struct Base {
Opaque<0> foo(Opaque<0>);
Opaque<0> foo(Opaque<1>);
Opaque<0> foo(Opaque<2>);
};
// using before decls
struct Test0 : Base {
using Base::foo;
Opaque<1> foo(Opaque<1>);
Opaque<1> foo(Opaque<3>);
void test0() { Opaque<0> _ = foo(Opaque<0>()); }
void test1() { Opaque<1> _ = foo(Opaque<1>()); }
void test2() { Opaque<0> _ = foo(Opaque<2>()); }
void test3() { Opaque<1> _ = foo(Opaque<3>()); }
};
// using after decls
struct Test1 : Base {
Opaque<1> foo(Opaque<1>);
Opaque<1> foo(Opaque<3>);
using Base::foo;
void test0() { Opaque<0> _ = foo(Opaque<0>()); }
void test1() { Opaque<1> _ = foo(Opaque<1>()); }
void test2() { Opaque<0> _ = foo(Opaque<2>()); }
void test3() { Opaque<1> _ = foo(Opaque<3>()); }
};
// using between decls
struct Test2 : Base {
Opaque<1> foo(Opaque<0>);
using Base::foo;
Opaque<1> foo(Opaque<2>);
Opaque<1> foo(Opaque<3>);
void test0() { Opaque<1> _ = foo(Opaque<0>()); }
void test1() { Opaque<0> _ = foo(Opaque<1>()); }
void test2() { Opaque<1> _ = foo(Opaque<2>()); }
void test3() { Opaque<1> _ = foo(Opaque<3>()); }
};
}
// Crazy dependent hiding.
namespace test2 {
struct Base {
void foo(int);
};
template <typename T> struct Derived1 : Base {
using Base::foo;
void foo(T);
void testUnresolved(int i) { foo(i); }
};
void test0(int i) {
Derived1<int> d1;
d1.foo(i);
d1.testUnresolved(i);
}
// Same thing, except with the order of members reversed.
template <typename T> struct Derived2 : Base {
void foo(T);
using Base::foo;
void testUnresolved(int i) { foo(i); }
};
void test1(int i) {
Derived2<int> d2;
d2.foo(i);
d2.testUnresolved(i);
}
}
// Hiding of member templates.
namespace test3 {
struct Base {
template <class T> Opaque<0> foo() { return Opaque<0>(); }
template <int n> Opaque<1> foo() { return Opaque<1>(); }
};
struct Derived1 : Base {
using Base::foo;
template <int n> Opaque<2> foo() { return Opaque<2>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'n'}}
};
struct Derived2 : Base {
template <int n> Opaque<2> foo() { return Opaque<2>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'n'}}
using Base::foo;
};
struct Derived3 : Base {
using Base::foo;
template <class T> Opaque<3> foo() { return Opaque<3>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'T'}}
};
struct Derived4 : Base {
template <class T> Opaque<3> foo() { return Opaque<3>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'T'}}
using Base::foo;
};
void test() {
expect<0>(Base().foo<int>());
expect<1>(Base().foo<0>());
expect<0>(Derived1().foo<int>()); // expected-error {{no matching member function for call to 'foo'}}
expect<2>(Derived1().foo<0>());
expect<0>(Derived2().foo<int>()); // expected-error {{no matching member function for call to 'foo'}}
expect<2>(Derived2().foo<0>());
expect<3>(Derived3().foo<int>());
expect<1>(Derived3().foo<0>()); // expected-error {{no matching member function for call to 'foo'}}
expect<3>(Derived4().foo<int>());
expect<1>(Derived4().foo<0>()); // expected-error {{no matching member function for call to 'foo'}}
}
}
// PR7384: access control for member templates.
namespace test4 {
class Base {
protected:
template<typename T> void foo(T);
template<typename T> void bar(T); // expected-note {{declared protected here}}
};
struct Derived : Base {
using Base::foo;
};
void test() {
Derived d;
d.foo<int>(3);
d.bar<int>(3); // expected-error {{'bar' is a protected member}}
}
}
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