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// <utility> 11 12// template<class T, T... I> 13// struct integer_sequence 14// { 15// typedef T type; 16// 17// static constexpr size_t size() noexcept; 18// }; 19 20#include <utility> 21#include <type_traits> 22#include <cassert> 23 24int main() 25{ 26#if _LIBCPP_STD_VER > 11 27 28// Make a few of sequences 29 using int3 = std::integer_sequence<int, 3, 2, 1>; 30 using size1 = std::integer_sequence<size_t, 7>; 31 using ushort2 = std::integer_sequence<unsigned short, 4, 6>; 32 using bool0 = std::integer_sequence<bool>; 33 34// Make sure they're what we expect 35 static_assert ( std::is_same<int3::value_type, int>::value, "int3 type wrong" ); 36 static_assert ( int3::size() == 3, "int3 size wrong" ); 37 38 static_assert ( std::is_same<size1::value_type, size_t>::value, "size1 type wrong" ); 39 static_assert ( size1::size() == 1, "size1 size wrong" ); 40 41 static_assert ( std::is_same<ushort2::value_type, unsigned short>::value, "ushort2 type wrong" ); 42 static_assert ( ushort2::size() == 2, "ushort2 size wrong" ); 43 44 static_assert ( std::is_same<bool0::value_type, bool>::value, "bool0 type wrong" ); 45 static_assert ( bool0::size() == 0, "bool0 size wrong" ); 46 47#endif // _LIBCPP_STD_VER > 11 48} 49