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// RUN: %clang_cc1 -fsyntax-only -verify %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
// C++03 [namespace.udecl]p4:
// A using-declaration used as a member-declaration shall refer to a
// member of a base class of the class being defined, shall refer to
// a member of an anonymous union that is a member of a base class
// of the class being defined, or shall refer to an enumerator for
// an enumeration type that is a member of a base class of the class
// being defined.
// There is no directly analogous paragraph in C++0x, and the feature
// works sufficiently differently there that it needs a separate test.
namespace test0 {
namespace NonClass {
typedef int type;
struct hiding {};
int hiding;
static union { double union_member; };
enum tagname { enumerator };
}
class Test0 {
using NonClass::type; // expected-error {{not a class}}
using NonClass::hiding; // expected-error {{not a class}}
using NonClass::union_member; // expected-error {{not a class}}
using NonClass::enumerator; // expected-error {{not a class}}
};
}
struct Opaque0 {};
namespace test1 {
struct A {
typedef int type;
struct hiding {}; // expected-note {{previous use is here}}
Opaque0 hiding;
union { double union_member; };
enum tagname { enumerator };
};
struct B : A {
using A::type;
using A::hiding;
using A::union_member;
using A::enumerator;
using A::tagname;
void test0() {
type t = 0;
}
void test1() {
typedef struct A::hiding local;
struct hiding _ = local();
}
void test2() {
union hiding _; // expected-error {{tag type that does not match previous}}
}
void test3() {
char array[sizeof(union_member) == sizeof(double) ? 1 : -1];
}
void test4() {
enum tagname _ = enumerator;
}
void test5() {
Opaque0 _ = hiding;
}
};
}
namespace test2 {
struct A {
typedef int type;
struct hiding {}; // expected-note {{previous use is here}}
int hiding;
union { double union_member; };
enum tagname { enumerator };
};
template <class T> struct B : A {
using A::type;
using A::hiding;
using A::union_member;
using A::enumerator;
using A::tagname;
void test0() {
type t = 0;
}
void test1() {
typedef struct A::hiding local;
struct hiding _ = local();
}
void test2() {
union hiding _; // expected-error {{tag type that does not match previous}}
}
void test3() {
char array[sizeof(union_member) == sizeof(double) ? 1 : -1];
}
void test4() {
enum tagname _ = enumerator;
}
void test5() {
Opaque0 _ = hiding;
}
};
}
namespace test3 {
struct hiding {};
template <class T> struct A {
typedef int type; // expected-note {{target of using declaration}}
struct hiding {};
Opaque0 hiding; // expected-note {{target of using declaration}}
union { double union_member; }; // expected-note {{target of using declaration}}
enum tagname { enumerator }; // expected-note 2 {{target of using declaration}}
};
template <class T> struct B : A<T> {
using A<T>::type; // expected-error {{dependent using declaration resolved to type without 'typename'}}
using A<T>::hiding;
using A<T>::union_member;
using A<T>::enumerator;
using A<T>::tagname; // expected-error {{dependent using declaration resolved to type without 'typename'}}
// FIXME: re-enable these when the various bugs involving tags are fixed
#if 0
void test1() {
typedef struct A<T>::hiding local;
struct hiding _ = local();
}
void test2() {
typedef struct A<T>::hiding local;
union hiding _ = local();
}
#endif
void test3() {
char array[sizeof(union_member) == sizeof(double) ? 1 : -1];
}
#if 0
void test4() {
enum tagname _ = enumerator;
}
#endif
void test5() {
Opaque0 _ = hiding;
}
};
template struct B<int>; // expected-note {{in instantiation}}
template <class T> struct C : A<T> {
using typename A<T>::type;
using typename A<T>::hiding; // expected-note {{declared here}} \
// expected-error {{'typename' keyword used on a non-type}}
using typename A<T>::union_member; // expected-error {{'typename' keyword used on a non-type}}
using typename A<T>::enumerator; // expected-error {{'typename' keyword used on a non-type}}
void test6() {
type t = 0;
}
void test7() {
Opaque0 _ = hiding; // expected-error {{does not refer to a value}}
}
};
template struct C<int>; // expected-note {{in instantiation}}
}
namespace test4 {
struct Base {
int foo();
};
struct Unrelated {
int foo();
};
struct Subclass : Base {
};
namespace InnerNS {
int foo();
}
// We should be able to diagnose these without instantiation.
template <class T> struct C : Base {
using InnerNS::foo; // expected-error {{not a class}}
using Base::bar; // expected-error {{no member named 'bar'}}
using Unrelated::foo; // expected-error {{not a base class}}
using C::foo; // legal in C++03
using Subclass::foo; // legal in C++03
#if __cplusplus >= 201103L
// expected-error@-3 {{refers to its own class}}
// expected-error@-3 {{refers into 'Subclass::', which is not a base class}}
#endif
int bar();
#if __cplusplus < 201103L
// expected-note@-2 {{target of using declaration}}
#endif
using C::bar; // expected-error {{refers to its own class}}
};
}
namespace test5 {
struct B;
struct A {
A(const B&);
B &operator=(const B&);
};
struct B : A {
#if __cplusplus >= 201103L
using A::A;
#endif
using A::operator=;
};
void test(B b) {
B b2(b);
b2 = b;
}
}
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