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29 lines
969 B
29 lines
969 B
//===----------------------------------------------------------------------===//
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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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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// <chrono>
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// using weeks = duration<signed integer type of at least 22 bits, ratio_multiply<ratio<7>, days::period>>;
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#include <chrono>
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#include <type_traits>
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#include <limits>
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int main()
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{
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typedef std::chrono::weeks D;
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typedef D::rep Rep;
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typedef D::period Period;
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static_assert(std::is_signed<Rep>::value, "");
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static_assert(std::is_integral<Rep>::value, "");
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static_assert(std::numeric_limits<Rep>::digits >= 22, "");
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static_assert(std::is_same_v<Period, std::ratio_multiply<std::ratio<7>, std::chrono::days::period>>, "");
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}
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