17ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow//===----------------------------------------------------------------------===// 27ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// 37ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// The LLVM Compiler Infrastructure 47ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// 57ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// This file is dual licensed under the MIT and the University of Illinois Open 67ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// Source Licenses. See LICENSE.TXT for details. 77ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// 87ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow//===----------------------------------------------------------------------===// 97ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 107ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// <utility> 117ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 127ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// template<class T, T... I> 137ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// struct integer_sequence 147ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// { 157ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// typedef T type; 167ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// 177ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// static constexpr size_t size() noexcept; 187ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// }; 197ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 207ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow#include <utility> 217ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow#include <type_traits> 227ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow#include <cassert> 237ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 247ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clowint main() 257ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow{ 267ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow#if _LIBCPP_STD_VER > 11 277ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 287ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// Make a few of sequences 297ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow using int3 = std::integer_sequence<int, 3, 2, 1>; 307ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow using size1 = std::integer_sequence<size_t, 7>; 317ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow using ushort2 = std::integer_sequence<unsigned short, 4, 6>; 327ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow using bool0 = std::integer_sequence<bool>; 337ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 347ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow// Make sure they're what we expect 357ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( std::is_same<int3::value_type, int>::value, "int3 type wrong" ); 367ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( int3::size() == 3, "int3 size wrong" ); 377ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 387ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( std::is_same<size1::value_type, size_t>::value, "size1 type wrong" ); 397ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( size1::size() == 1, "size1 size wrong" ); 407ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 417ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( std::is_same<ushort2::value_type, unsigned short>::value, "ushort2 type wrong" ); 427ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( ushort2::size() == 2, "ushort2 size wrong" ); 437ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 447ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( std::is_same<bool0::value_type, bool>::value, "bool0 type wrong" ); 457ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow static_assert ( bool0::size() == 0, "bool0 size wrong" ); 467ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow 477ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow#endif // _LIBCPP_STD_VER > 11 487ec46bc4228ae1c23a34220d8c6885356d18918cMarshall Clow} 49