49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <utility>
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// template<class T, T... I>
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// struct integer_sequence
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// {
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// typedef T type;
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//
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// static constexpr size_t size() noexcept;
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// };
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#include <utility>
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#include <type_traits>
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#include <cassert>
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int main()
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{
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#if _LIBCPP_STD_VER > 11
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// Make a few of sequences
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using int3 = std::integer_sequence<int, 3, 2, 1>;
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using size1 = std::integer_sequence<size_t, 7>;
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using ushort2 = std::integer_sequence<unsigned short, 4, 6>;
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using bool0 = std::integer_sequence<bool>;
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// Make sure they're what we expect
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static_assert ( std::is_same<int3::value_type, int>::value, "int3 type wrong" );
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static_assert ( int3::size() == 3, "int3 size wrong" );
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static_assert ( std::is_same<size1::value_type, size_t>::value, "size1 type wrong" );
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static_assert ( size1::size() == 1, "size1 size wrong" );
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static_assert ( std::is_same<ushort2::value_type, unsigned short>::value, "ushort2 type wrong" );
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static_assert ( ushort2::size() == 2, "ushort2 size wrong" );
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static_assert ( std::is_same<bool0::value_type, bool>::value, "bool0 type wrong" );
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static_assert ( bool0::size() == 0, "bool0 size wrong" );
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#endif // _LIBCPP_STD_VER > 11
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}
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