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// Copyright (C) 2017-2021 Free Software Foundation, Inc.
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <>.
// { dg-do compile { target c++11 } }
#include <chrono>
#include <type_traits>
using namespace std;
using namespace std::chrono;
// DR 1177
static_assert(is_constructible<duration<float>, duration<double>>{},
"can convert duration with one floating point rep to another");
static_assert(is_constructible<duration<float>, duration<int>>{},
"can convert duration with integral rep to one with floating point rep");
static_assert(!is_constructible<duration<int>, duration<float>>{},
"cannot convert duration with floating point rep to one with integral rep");
static_assert(is_constructible<duration<int>, duration<long>>{},
"can convert duration with one integral rep to another");
static_assert(!is_constructible<duration<int>, duration<int, ratio<2,3>>>{},
"cannot convert duration to one with different period");
static_assert(is_constructible<duration<float>, duration<int, ratio<2,3>>>{},
"... unless the result type has a floating-point representation");
static_assert(is_constructible<duration<int, ratio<1,3>>, duration<int>>{},
"... or the original's period is a multiple of the result's period");