1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// UNSUPPORTED: c++98, c++03, c++11 11 12// <experimental/tuple> 13 14// template <class T> constexpr size_t tuple_size_v = tuple_size<T>::value; 15 16// Test with reference 17 18#include <experimental/tuple> 19 20namespace ex = std::experimental; 21 22int main() 23{ 24 auto x = ex::tuple_size_v<std::tuple<> &>; 25} 26