forked from mirror/libcxx
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
|
|
|
|
// <chrono>
|
|
// class year_month_day_last;
|
|
|
|
// constexpr year_month_day_last
|
|
// operator-(const year_month_day_last& ymdl, const months& dm) noexcept;
|
|
//
|
|
// Returns: ymdl + (-dm).
|
|
//
|
|
// constexpr year_month_day_last
|
|
// operator-(const year_month_day_last& ymdl, const years& dy) noexcept;
|
|
//
|
|
// Returns: ymdl + (-dy).
|
|
|
|
|
|
#include <chrono>
|
|
#include <type_traits>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
|
|
#include <iostream>
|
|
|
|
constexpr bool testConstexprYears (std::chrono::year_month_day_last ymdl)
|
|
{
|
|
std::chrono::year_month_day_last ym1 = ymdl - std::chrono::years{10};
|
|
return
|
|
ym1.year() == std::chrono::year{static_cast<int>(ymdl.year()) - 10}
|
|
&& ym1.month() == ymdl.month()
|
|
;
|
|
}
|
|
|
|
constexpr bool testConstexprMonths (std::chrono::year_month_day_last ymdl)
|
|
{
|
|
std::chrono::year_month_day_last ym1 = ymdl - std::chrono::months{6};
|
|
return
|
|
ym1.year() == ymdl.year()
|
|
&& ym1.month() == std::chrono::month{static_cast<unsigned>(ymdl.month()) - 6}
|
|
;
|
|
}
|
|
|
|
int main()
|
|
{
|
|
using year = std::chrono::year;
|
|
using month = std::chrono::month;
|
|
using month_day_last = std::chrono::month_day_last;
|
|
using year_month_day_last = std::chrono::year_month_day_last;
|
|
using months = std::chrono::months;
|
|
using years = std::chrono::years;
|
|
|
|
constexpr month December = std::chrono::December;
|
|
|
|
{ // year_month_day_last - years
|
|
ASSERT_NOEXCEPT( std::declval<year_month_day_last>() - std::declval<years>());
|
|
ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() - std::declval<years>()));
|
|
|
|
static_assert(testConstexprYears(year_month_day_last{year{1234}, month_day_last{December}}), "");
|
|
year_month_day_last ym{year{1234}, month_day_last{December}};
|
|
for (int i = 0; i <= 10; ++i)
|
|
{
|
|
year_month_day_last ym1 = ym - years{i};
|
|
assert(static_cast<int>(ym1.year()) == 1234 - i);
|
|
assert(ym1.month() == December);
|
|
}
|
|
}
|
|
|
|
{ // year_month_day_last - months
|
|
ASSERT_NOEXCEPT( std::declval<year_month_day_last>() - std::declval<months>());
|
|
ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() - std::declval<months>()));
|
|
|
|
static_assert(testConstexprMonths(year_month_day_last{year{1234}, month_day_last{December}}), "");
|
|
// TODO test wrapping
|
|
year_month_day_last ym{year{1234}, month_day_last{December}};
|
|
for (unsigned i = 0; i <= 10; ++i)
|
|
{
|
|
year_month_day_last ym1 = ym - months{i};
|
|
assert(static_cast<int>(ym1.year()) == 1234);
|
|
assert(static_cast<unsigned>(ym1.month()) == 12U-i);
|
|
}
|
|
}
|
|
|
|
}
|