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 // <utility> 12 13 // template<class T, T... I> 14 // struct integer_sequence 15 // { 16 // typedef T type; 17 // 18 // static constexpr size_t size() noexcept; 19 // }; 20 21 #include <utility> 22 #include <type_traits> 23 #include <cstddef> 24 #include <cassert> 25 26 int main() 27 { 28 // Make a few of sequences 29 using int3 = std::integer_sequence<int, 3, 2, 1>; 30 using size1 = std::integer_sequence<std::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, std::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
