p6.cpp
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// RUN: %clang_cc1 -fsyntax-only -verify %s
// Test class template partial specializations of member templates.
template<typename T>
struct X0 {
template<typename U> struct Inner0 {
static const unsigned value = 0;
};
template<typename U> struct Inner0<U*> {
static const unsigned value = 1;
};
};
template<typename T> template<typename U>
struct X0<T>::Inner0<const U*> {
static const unsigned value = 2;
};
int array0[X0<int>::Inner0<int>::value == 0? 1 : -1];
int array1[X0<int>::Inner0<int*>::value == 1? 1 : -1];
int array2[X0<int>::Inner0<const int*>::value == 2? 1 : -1];
// Make sure we can provide out-of-line class template partial specializations
// for member templates (and instantiate them).
template<class T> struct A {
struct C {
template<class T2> struct B;
};
};
// partial specialization of A<T>::C::B<T2>
template<class T> template<class T2> struct A<T>::C::B<T2*> { };
A<short>::C::B<int*> absip;
// Check for conflicts during template instantiation.
template<typename T, typename U>
struct Outer {
template<typename X, typename Y> struct Inner;
template<typename Y> struct Inner<T, Y> {}; // expected-note{{previous}}
template<typename Y> struct Inner<U, Y> {}; // expected-error{{cannot be redeclared}}
};
Outer<int, int> outer; // expected-note{{instantiation}}
// Test specialization of class template partial specialization members.
template<> template<typename Z>
struct X0<float>::Inner0<Z*> {
static const unsigned value = 3;
};
int array3[X0<float>::Inner0<int>::value == 0? 1 : -1];
int array4[X0<float>::Inner0<int*>::value == 3? 1 : -1];
int array5[X0<float>::Inner0<const int*>::value == 2? 1 : -1];
namespace rdar8651930 {
template<typename OuterT>
struct Outer {
template<typename T, typename U>
struct Inner;
template<typename T>
struct Inner<T, T> {
static const bool value = true;
};
template<typename T, typename U>
struct Inner {
static const bool value = false;
};
};
int array0[Outer<int>::Inner<int, int>::value? 1 : -1];
int array1[Outer<int>::Inner<int, float>::value? -1 : 1];
}