From Jason Turner

[time.cal.ymwd.members]

C++17 → C++20 3.3 KB 127 lines
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tmp/tmp9l7nl0bv/{from.md → to.md} RENAMED
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+ #### Member functions <a id="time.cal.ymwd.members">[[time.cal.ymwd.members]]</a>
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+
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+ ``` cpp
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+ constexpr year_month_weekday(const chrono::year& y, const chrono::month& m,
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+ const chrono::weekday_indexed& wdi) noexcept;
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+ ```
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+
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+ *Effects:* Initializes `y_` with `y`, `m_` with `m`, and `wdi_` with
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+ `wdi`.
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+
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+ ``` cpp
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+ constexpr year_month_weekday(const sys_days& dp) noexcept;
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+ ```
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+
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+ *Effects:* Constructs an object of type `year_month_weekday` which
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+ corresponds to the date represented by `dp`.
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+
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+ *Remarks:* For any value `ymdl` of type `year_month_weekday` for which
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+ `ymdl.ok()` is `true`, `ymdl == year_month_weekday{sys_days{ymdl}}` is
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+ `true`.
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+
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+ ``` cpp
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+ constexpr explicit year_month_weekday(const local_days& dp) noexcept;
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+ ```
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+
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+ *Effects:* Equivalent to constructing with
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+ `sys_days{dp.time_since_epoch()}`.
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+
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+ ``` cpp
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+ constexpr year_month_weekday& operator+=(const months& m) noexcept;
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+ ```
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+
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+ *Constraints:* If the argument supplied by the caller for the `months`
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+ parameter is convertible to `years`, its implicit conversion sequence to
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+ `years` is worse than its implicit conversion sequence to `months`
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+ [[over.ics.rank]].
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+
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+ *Effects:* `*this = *this + m`.
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+
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+ *Returns:* `*this`.
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+
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+ ``` cpp
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+ constexpr year_month_weekday& operator-=(const months& m) noexcept;
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+ ```
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+
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+ *Constraints:* If the argument supplied by the caller for the `months`
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+ parameter is convertible to `years`, its implicit conversion sequence to
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+ `years` is worse than its implicit conversion sequence to `months`
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+ [[over.ics.rank]].
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+
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+ *Effects:* `*this = *this - m`.
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+
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+ *Returns:* `*this`.
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+
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+ ``` cpp
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+ constexpr year_month_weekday& operator+=(const years& y) noexcept;
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+ ```
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+
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+ *Effects:* `*this = *this + y`.
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+
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+ *Returns:* `*this`.
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+
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+ ``` cpp
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+ constexpr year_month_weekday& operator-=(const years& y) noexcept;
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+ ```
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+
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+ *Effects:* `*this = *this - y`.
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+
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+ *Returns:* `*this`.
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+
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+ ``` cpp
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+ constexpr chrono::year year() const noexcept;
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+ ```
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+
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+ *Returns:* `y_`.
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+
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+ ``` cpp
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+ constexpr chrono::month month() const noexcept;
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+ ```
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+
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+ *Returns:* `m_`.
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+
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+ ``` cpp
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+ constexpr chrono::weekday weekday() const noexcept;
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+ ```
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+
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+ *Returns:* `wdi_.weekday()`.
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+
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+ ``` cpp
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+ constexpr unsigned index() const noexcept;
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+ ```
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+
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+ *Returns:* `wdi_.index()`.
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+
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+ ``` cpp
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+ constexpr chrono::weekday_indexed weekday_indexed() const noexcept;
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+ ```
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+
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+ *Returns:* `wdi_`.
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+
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+ ``` cpp
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+ constexpr operator sys_days() const noexcept;
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+ ```
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+
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+ *Returns:* If `y_.ok() && m_.ok() && wdi_.weekday().ok()`, returns a
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+ `sys_days` that represents the date `(index() - 1) * 7` days after the
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+ first `weekday()` of `year()/month()`. If `index()` is 0 the returned
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+ `sys_days` represents the date 7 days prior to the first `weekday()` of
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+ `year()/month()`. Otherwise the returned value is unspecified.
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+
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+ ``` cpp
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+ constexpr explicit operator local_days() const noexcept;
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+ ```
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+
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+ *Returns:* `local_days{sys_days{*this}.time_since_epoch()}`.
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+
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+ ``` cpp
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+ constexpr bool ok() const noexcept;
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+ ```
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+
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+ *Returns:* If any of `y_.ok()`, `m_.ok()`, or `wdi_.ok()` is `false`,
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+ returns `false`. Otherwise, if `*this` represents a valid date, returns
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+ `true`. Otherwise, returns `false`.
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+