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49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <chrono>
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// duration
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// static constexpr duration zero(); // noexcept after C++17
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#include <chrono>
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#include <cassert>
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#include "test_macros.h"
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#include "../../rep.h"
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template <class D>
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void test()
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{
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LIBCPP_ASSERT_NOEXCEPT(std::chrono::duration_values<typename D::rep>::zero());
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#if TEST_STD_VER > 17
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ASSERT_NOEXCEPT( std::chrono::duration_values<typename D::rep>::zero());
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#endif
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{
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typedef typename D::rep Rep;
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Rep zero_rep = std::chrono::duration_values<Rep>::zero();
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assert(D::zero().count() == zero_rep);
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}
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#if TEST_STD_VER >= 11
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{
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typedef typename D::rep Rep;
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constexpr Rep zero_rep = std::chrono::duration_values<Rep>::zero();
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static_assert(D::zero().count() == zero_rep, "");
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}
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#endif
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}
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int main(int, char**)
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{
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test<std::chrono::duration<int> >();
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test<std::chrono::duration<Rep> >();
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return 0;
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}
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