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// <tuple> 11 12// template <class... Types> class tuple; 13 14// template <class... Types> 15// class tuple_size<tuple<Types...>> 16// : public integral_constant<size_t, sizeof...(Types)> { }; 17 18// XFAIL: gcc-4.9 19// UNSUPPORTED: c++98, c++03 20 21#include <tuple> 22#include <array> 23#include <type_traits> 24 25template <class T, size_t Size = sizeof(std::tuple_size<T>)> 26constexpr bool is_complete(int) { static_assert(Size > 0, ""); return true; } 27template <class> constexpr bool is_complete(long) { return false; } 28template <class T> constexpr bool is_complete() { return is_complete<T>(0); } 29 30struct Dummy1 {}; 31struct Dummy2 {}; 32 33namespace std { 34template <> class tuple_size<Dummy1> : public integral_constant<size_t, 0> {}; 35} 36 37template <class T> 38void test_complete() { 39 static_assert(is_complete<T>(), ""); 40 static_assert(is_complete<const T>(), ""); 41 static_assert(is_complete<volatile T>(), ""); 42 static_assert(is_complete<const volatile T>(), ""); 43} 44 45template <class T> 46void test_incomplete() { 47 static_assert(!is_complete<T>(), ""); 48 static_assert(!is_complete<const T>(), ""); 49 static_assert(!is_complete<volatile T>(), ""); 50 static_assert(!is_complete<const volatile T>(), ""); 51} 52 53 54int main() 55{ 56 test_complete<std::tuple<> >(); 57 test_complete<std::tuple<int&> >(); 58 test_complete<std::tuple<int&&, int&, void*>>(); 59 test_complete<std::pair<int, long> >(); 60 test_complete<std::array<int, 5> >(); 61 test_complete<Dummy1>(); 62 63 test_incomplete<void>(); 64 test_incomplete<int>(); 65 test_incomplete<std::tuple<int>&>(); 66 test_incomplete<Dummy2>(); 67} 68