153 lines
4.6 KiB
C++
153 lines
4.6 KiB
C++
// RUN: %clang_cc1 -std=c++11 -verify %s
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template<typename T> struct A {
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enum E : T; // expected-note {{here}}
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E v;
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E f() { return A::e1; } // expected-error {{no member named 'e1' in 'A<T>'}}
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E g() { return E::e1; }
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E h();
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};
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A<int> a;
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A<int>::E a0 = A<int>().v;
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int n = A<int>::E::e1; // expected-error {{implicit instantiation of undefined member}}
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template<typename T> enum A<T>::E : T { e1, e2 }; // expected-note 2 {{declared here}}
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// FIXME: Now that A<T>::E is defined, we are supposed to inject its enumerators
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// into the already-instantiated class A<T>. This seems like a really bad idea,
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// though, so we don't implement that, but what we do implement is inconsistent.
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//
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// Either do as the standard says, or only include enumerators lexically defined
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// within the class in its scope.
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A<int>::E a1 = A<int>::e1; // expected-error {{no member named 'e1' in 'A<int>'; did you mean simply 'e1'?}}
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A<char>::E a2 = A<char>::e2;
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template<typename T> typename A<T>::E A<T>::h() { return e2; }
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A<short>::E a3 = A<short>().h();
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template<typename T> struct B {
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enum class E;
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E v;
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E f() { return E::e1; }
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E g();
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};
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B<int> b;
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B<int>::E b0 = B<int>().v;
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template<typename T> enum class B<T>::E { e1, e2 };
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B<int>::E b1 = B<int>::E::e1;
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B<char>::E b2 = B<char>::E::e2;
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template<typename T> typename B<T>::E B<T>::g() { return e2; }
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B<short>::E b3 = B<short>().g();
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// Enumeration members of class templates can be explicitly specialized. For
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// unscoped enumerations, specializations must be defined before the primary
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// template is, since otherwise the primary template will be implicitly
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// instantiated when we parse the nested name specifier.
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template<> enum A<long long>::E : long long { e3, e4 }; // expected-error {{explicit specialization of 'E' after instantiation}} expected-note {{first required here}}
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template<> enum class B<long long>::E { e3, e4 };
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B<long long>::E b4 = B<long long>::E::e4;
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B<long>::E b5;
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template<> enum class B<long>::E { e5 };
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void fb5() { b5 = decltype(b5)::e5; }
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B<long>::E b6 = B<long>::E::e5;
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template<typename T> struct C {
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enum class E : T;
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};
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template<> enum class C<long long>::E : long long { e3, e4 };
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C<long long>::E c0 = C<long long>::E::e3;
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C<long>::E c1;
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template<> enum class C<long>::E : long { e5 };
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void fc1() { c1 = decltype(c1)::e5; }
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C<long>::E c2 = C<long>::E::e5;
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template<> enum class C<int>::E : int { e6 };
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template<typename T> enum class C<T>::E : T { e0 };
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C<int>::E c3 = C<int>::E::e6;
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C<int>::E c4 = C<int>::E::e0; // expected-error {{no member named 'e0' in 'C<int>::E'}}
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// Enumeration members can't be partially-specialized.
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template<typename T> enum class B<T*>::E { e5, e6 }; // expected-error {{nested name specifier for a declaration cannot depend on a template parameter}}
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// Explicit specializations can be forward-declared.
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template<typename T>
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struct D {
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enum class E { e1 };
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};
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template<> enum class D<int>::E;
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D<int>::E d1 = D<int>::E::e1; // expected-error {{incomplete type 'D<int>::E'}}
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template<> enum class D<int>::E { e2 };
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D<int>::E d2 = D<int>::E::e2;
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D<char>::E d3 = D<char>::E::e1; // expected-note {{first required here}}
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D<char>::E d4 = D<char>::E::e2; // expected-error {{no member named 'e2' in 'D<char>::E'; did you mean simply 'e2'?}}
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template<> enum class D<char>::E { e3 }; // expected-error {{explicit specialization of 'E' after instantiation}}
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template<> enum class D<short>::E;
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struct F {
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// Per C++11 [class.friend]p3, these friend declarations have no effect.
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// Only classes and functions can be friends.
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template<typename T> friend enum D<T>::E;
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template<> friend enum D<short>::E;
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template<> friend enum D<double>::E { e3 }; // expected-error {{cannot define a type in a friend declaration}}
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private:
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static const int n = 1; // expected-note {{private here}}
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};
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template<> enum class D<short>::E {
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e = F::n // expected-error {{private member}}
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};
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class Access {
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friend class X;
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template<typename T>
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class Priv {
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friend class X;
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enum class E : T;
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};
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class S {
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typedef int N; // expected-note {{here}}
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static const int k = 3; // expected-note {{here}}
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friend class Priv<char>;
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};
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static const int k = 5;
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};
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template<> enum class Access::Priv<Access::S::N>::E
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: Access::S::N { // expected-error {{private member}}
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a = Access::k, // ok
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b = Access::S::k // expected-error {{private member}}
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};
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template<typename T> enum class Access::Priv<T>::E : T {
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c = Access::k,
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d = Access::S::k
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};
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class X {
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Access::Priv<int>::E a = Access::Priv<int>::E::a;
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Access::Priv<char>::E c = Access::Priv<char>::E::d;
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// FIXME: We should see an access error for this enumerator.
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Access::Priv<short>::E b = Access::Priv<short>::E::d;
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};
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