increment.pass.cpp
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <chrono>
// class weekday;
// constexpr weekday& operator++() noexcept;
// constexpr weekday operator++(int) noexcept;
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "../../euclidian.h"
template <typename WD>
constexpr bool testConstexpr()
{
WD wd{5};
if ((++wd).c_encoding() != 6) return false;
if ((wd++).c_encoding() != 6) return false;
if ((wd) .c_encoding() != 0) return false;
return true;
}
int main(int, char**)
{
using weekday = std::chrono::weekday;
ASSERT_NOEXCEPT(++(std::declval<weekday&>()) );
ASSERT_NOEXCEPT( (std::declval<weekday&>())++);
ASSERT_SAME_TYPE(weekday , decltype( std::declval<weekday&>()++));
ASSERT_SAME_TYPE(weekday&, decltype(++std::declval<weekday&>() ));
static_assert(testConstexpr<weekday>(), "");
for (unsigned i = 0; i <= 6; ++i)
{
weekday wd(i);
assert(((++wd).c_encoding() == euclidian_addition<unsigned, 0, 6>(i, 1)));
assert(((wd++).c_encoding() == euclidian_addition<unsigned, 0, 6>(i, 1)));
assert(((wd) .c_encoding() == euclidian_addition<unsigned, 0, 6>(i, 2)));
}
return 0;
}