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// RUN: %clang_cc1 -std=c++11 -verify %s
// The implicit specialization of a class template specialuzation causes the
// implicit instantiation of the declarations, but not the definitions or
// default arguments, of:
// FIXME: Many omitted cases
// - scoped member enumerations
namespace ScopedEnum {
template<typename T> struct ScopedEnum1 {
enum class E {
e = T::error // expected-error {{'double' cannot be used prior to '::'}}
};
};
ScopedEnum1<int> se1; // ok
template<typename T> struct ScopedEnum2 {
enum class E : T { // expected-error {{non-integral type 'void *' is an invalid underlying type}}
e = 0
};
};
ScopedEnum2<void*> se2; // expected-note {{here}}
template<typename T> struct UnscopedEnum3 {
enum class E : T {
e = 4
};
int arr[(int)E::e];
};
UnscopedEnum3<int> ue3; // ok
ScopedEnum1<double>::E e1; // ok
ScopedEnum1<double>::E e2 = decltype(e2)::e; // expected-note {{in instantiation of enumeration 'ScopedEnum::ScopedEnum1<double>::E' requested here}}
// The behavior for enums defined within function templates is not clearly
// specified by the standard. We follow the rules for enums defined within
// class templates.
template<typename T>
int f() {
enum class E {
e = T::error
};
return (int)E();
}
int test1 = f<int>();
template<typename T>
int g() {
enum class E {
e = T::error // expected-error {{has no members}}
};
return E::e; // expected-note {{here}}
}
int test2 = g<int>(); // expected-note {{here}}
}
// And it cases the implicit instantiations of the definitions of:
// - unscoped member enumerations
namespace UnscopedEnum {
template<typename T> struct UnscopedEnum1 {
enum E {
e = T::error // expected-error {{'int' cannot be used prior to '::'}}
};
};
UnscopedEnum1<int> ue1; // expected-note {{here}}
template<typename T> struct UnscopedEnum2 {
enum E : T { // expected-error {{non-integral type 'void *' is an invalid underlying type}}
e = 0
};
};
UnscopedEnum2<void*> ue2; // expected-note {{here}}
template<typename T> struct UnscopedEnum3 {
enum E : T {
e = 4
};
int arr[E::e];
};
UnscopedEnum3<int> ue3; // ok
template<typename T>
int f() {
enum E {
e = T::error // expected-error {{has no members}}
};
return (int)E();
}
int test1 = f<int>(); // expected-note {{here}}
template<typename T>
int g() {
enum E {
e = T::error // expected-error {{has no members}}
};
return E::e;
}
int test2 = g<int>(); // expected-note {{here}}
}
// FIXME:
//- - member anonymous unions
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