01afa5c6e4
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@189772 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
797 B
C++
39 lines
797 B
C++
//===----------------------------------------------------------------------===//
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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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// <optional>
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// struct in_place_t{};
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// constexpr in_place_t in_place{};
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#include <optional>
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#include <type_traits>
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#if _LIBCPP_STD_VER > 11
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constexpr
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int
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test(const std::in_place_t&)
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{
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return 3;
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}
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#endif
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int main()
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{
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#if _LIBCPP_STD_VER > 11
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static_assert((std::is_class<std::in_place_t>::value), "");
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static_assert((std::is_empty<std::in_place_t>::value), "");
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static_assert(test(std::in_place) == 3, "");
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#endif
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}
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