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// Origin: PR c++/42634
// { dg-options "-g -std=c++0x" }
// { dg-do compile }
template<typename T> T declval();
template<typename T, typename... Args> struct is_constructible {
template<typename T1, typename... Args1> static decltype(T1(declval<Args1>()...), char()) test();
static const bool value = sizeof(test<T, Args...>()) == 1;
};
template<bool> struct enable_if {
typedef void type;
};
template<class T1, class T2> struct pair {
template<class U2,
class = typename enable_if<is_constructible<T2,U2&&>::value>::type
>
pair(const T1&, U2&&) { }
};
struct string {
string() : p(0) {}
char* p;
};
struct Foo {
string s;
int i;
};
void f()
{
pair<int, Foo>(1, Foo());
}
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