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Expose iso_week::year::is_leap()

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This commit is contained in:
DavisVaughan 2023-04-21 14:19:32 -04:00 committed by Howard Hinnant
parent 50acf3ffd8
commit cc4685a21e
2 changed files with 17 additions and 4 deletions
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18
include/date/iso_week.h
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@ -148,6 +148,8 @@ public:
year& operator+=(const years& y) NOEXCEPT;
year& operator-=(const years& y) NOEXCEPT;
CONSTCD14 bool is_leap() const NOEXCEPT;
CONSTCD11 explicit operator int() const NOEXCEPT;
CONSTCD11 bool ok() const NOEXCEPT;
@ -599,6 +601,17 @@ inline year year::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return t
inline year& year::operator+=(const years& y) NOEXCEPT {*this = *this + y; return *this;}
inline year& year::operator-=(const years& y) NOEXCEPT {*this = *this - y; return *this;}
CONSTCD14
inline
bool
year::is_leap() const NOEXCEPT
{
const auto y = date::year{static_cast<int>(y_)};
const auto s0 = sys_days((y-years{1})/12/date::thu[date::last]);
const auto s1 = sys_days(y/12/date::thu[date::last]);
return s1-s0 != days{7*52};
}
CONSTCD11 inline year::operator int() const NOEXCEPT {return y_;}
CONSTCD11 inline bool year::ok() const NOEXCEPT {return min() <= *this && *this <= max();}
@ -1020,10 +1033,7 @@ inline
weeknum
year_lastweek::weeknum() const NOEXCEPT
{
const auto y = date::year{static_cast<int>(y_)};
const auto s0 = sys_days((y-years{1})/12/date::thu[date::last]);
const auto s1 = sys_days(y/12/date::thu[date::last]);
return iso_week::weeknum(static_cast<unsigned>(date::trunc<weeks>(s1-s0).count()));
return iso_week::weeknum(y_.is_leap() ? 53u : 52u);
}
CONSTCD11 inline bool year_lastweek::ok() const NOEXCEPT {return y_.ok();}

3
test/iso_week/year.pass.cpp
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@ -93,6 +93,9 @@ main()
static_assert(year{2015} <= 2015_y, "");
static_assert(year{2016} >= 2015_y, "");
static_assert(year{2015}.is_leap(), "");
static_assert(!year{2016}.is_leap(), "");
auto y = year{2014};
assert(++y == year{2015});
assert(y == year{2015});