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// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
namespace ParameterPacksWithFunctions {
template<typename ...> struct count;
template<typename Head, typename ...Tail>
struct count<Head, Tail...> {
static const unsigned value = 1 + count<Tail...>::value;
};
template<>
struct count<> {
static const unsigned value = 0;
};
template<unsigned> struct unsigned_c { };
template<typename ... Types>
unsigned_c<count<Types...>::value> f();
void test_f() {
unsigned_c<0> uc0a = f(); // okay, deduced to an empty pack
unsigned_c<0> uc0b = f<>();
unsigned_c<1> uc1 = f<int>();
unsigned_c<2> uc2 = f<float, double>();
}
}
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