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, class Alloc> 15 // struct uses_allocator<tuple<Types...>, Alloc> : true_type { }; 16 17 // UNSUPPORTED: c++98, c++03 18 19 #include <tuple> 20 #include <type_traits> 21 22 struct A {}; 23 24 int main() 25 { 26 { 27 typedef std::tuple<> T; 28 static_assert((std::is_base_of<std::true_type, 29 std::uses_allocator<T, A>>::value), ""); 30 } 31 { 32 typedef std::tuple<int> T; 33 static_assert((std::is_base_of<std::true_type, 34 std::uses_allocator<T, A>>::value), ""); 35 } 36 { 37 typedef std::tuple<char, int> T; 38 static_assert((std::is_base_of<std::true_type, 39 std::uses_allocator<T, A>>::value), ""); 40 } 41 { 42 typedef std::tuple<double&, char, int> T; 43 static_assert((std::is_base_of<std::true_type, 44 std::uses_allocator<T, A>>::value), ""); 45 } 46 } 47
