Author: Linux Manual

std::chrono::year_month_day::operator+=,std::chrono::year_month_day::operator-= – std::chrono::year_month_day::operator+=,std::chrono::year_month_day::operator-= Synopsis constexpr std::chrono::year_month_day &operator+=(const std::chrono::years &dy) const noexcept; (1)(since C++ 20) constexpr std::chrono::year_month_day & operator+=(const std::chrono::months &dm) const noexcept; (2)(since C++ 20) constexpr std::chrono::year_month_day & operator-=(const std::chrono::years &dy) const noexcept; (3)(since C++ 20) constexpr std::chrono::year_month_day & operator-=(const std::chrono::months &dm) const noexcept; (4) (since C++20) Modifies the time point *this represents by the…

std::chrono::year_month_day::ok – std::chrono::year_month_day::ok Synopsis constexpr bool ok() const noexcept; (since C++20) Checks if this year_month_day object represents a valid calendar date. Return value true if this year_month_day object represents a valid calendar date, that is, the stored year, month, and day values are all valid and the stored day value is within the number of…

std::chrono::year_month_day – std::chrono::year_month_day Synopsis Defined in header <chrono> class year_month_day; (since C++20) The class year_month_day represents a specific year, month, and day. It is a field-based time point, with a resolution of std::chrono::days. std::chrono::years- and std::chrono::months-oriented arithmetic are supported directly. An implicit conversion to and from std::chrono::sys_days allows std::chrono::days-oriented arithmetic to be performed efficiently. year_month_day…

std::chrono::year_month::year_month – std::chrono::year_month::year_month Synopsis year_month() = default; (1)(since C++ 20) constexpr year_month(const std::chrono::year &y, const std::chrono::month &m) noexcept; (2)(since C++ 20) Constructs a year_month object. 1) Default constructor leaves the year and month uninitialized. 2) Constructs a year_month object storing the year y and the month m. Notes A more convenient way to construct a…

std::chrono::year_month::year,std::chrono::year_month::month – std::chrono::year_month::year,std::chrono::year_month::month Synopsis constexpr std::chrono::year year() const noexcept; (1) (since C++20) constexpr std::chrono::month month() const noexcept; (2) (since C++20) Retrieves the year and month values stored in this year_month object. Return values 1) Returns the stored std::chrono::year value. 2) Returns the stored std::chrono::month value.

std::chrono::year_month::operator+=,std::chrono::year_month::operator-= – std::chrono::year_month::operator+=,std::chrono::year_month::operator-= Synopsis constexpr std::chrono::year_month &operator+=(const std::chrono::years &dy) const noexcept; (1)(since C++ 20) constexpr std::chrono::year_month & operator+=(const std::chrono::months &dm) const noexcept; (2)(since C++ 20) constexpr std::chrono::year_month & operator-=(const std::chrono::years &dy) const noexcept; (3)(since C++ 20) constexpr std::chrono::year_month & operator-=(const std::chrono::months &dm) const noexcept; (4) (since C++20) Modifies the time point *this represents by the…

std::chrono::year_month::ok – std::chrono::year_month::ok Synopsis constexpr bool ok() const noexcept; (since C++20) Checks if the year and month values stored in this object are valid. Return value year().ok() && month().ok()

std::chrono::year_month – std::chrono::year_month Synopsis Defined in header <chrono> class year_month; (since C++20) The class year_month represents a specific month of a specific year, but with an unspecified day. It is a field-based time point, with a resolution of std::chrono::months. year_month is a TriviallyCopyable StandardLayoutType. Member functions               constructs a year_month constructor (public member function)               accesses the…

std::chrono::year::year – std::chrono::year::year Synopsis year() = default; (since C++ 20) explicit constexpr year(int y) noexcept; (since C++ 20) Constructs a year object. 1) Default constructor leaves the year value uninitialized. 2) If y is in the range [-32767, 32767], constructs a year object holding the year value y. Otherwise the value held is unspecified.

std::chrono::year::operatorint – std::chrono::year::operatorint Synopsis explicit constexpr operator int() const noexcept; (since C++20) Returns the year value stored in *this. Return value The year value stored in *this.

std::chrono::year::operator+=,std::chrono::year::operator-= – std::chrono::year::operator+=,std::chrono::year::operator-= Synopsis constexpr std::chrono::year &operator+=(const std::chrono::years &y) noexcept; (1)(since C++ 20) constexpr std::chrono::year & operator-=(const std::chrono::years &y) noexcept; (2) (since C++20) Adds or subtracts y.count() years from the year value. 1) Equivalent to *this = *this + y; 2) Equivalent to *this = *this – y; Return value A reference to this year…

std::chrono::year::operator+,std::chrono::year::operator- – std::chrono::year::operator+,std::chrono::year::operator- Synopsis constexpr std::chrono::year operator+() noexcept; (1) (since C++20) constexpr std::chrono::year operator-() noexcept; (2) (since C++20) Applies the unary operators to the year value. 1) Returns a copy of *this. 2) Returns a year whose year value is the negation of that of *this. Return value 1) *this 2) std::chrono::year(-int(*this)) Example  This section…

std::chrono::year::operator++,std::chrono::year::operator– – std::chrono::year::operator++,std::chrono::year::operator– Synopsis constexpr std::chrono::year& operator++() noexcept; (1) (since C++20) constexpr std::chrono::year operator++(int) noexcept; (2) (since C++20) constexpr std::chrono::year& operator–() noexcept; (3) (since C++20) constexpr std::chrono::year operator–(int) noexcept; (4) (since C++20) Adds or subtracts 1 from the year value. 1-2) Performs *this += std::chrono::years{1}; 3-4) Performs *this -= std::chrono::years{1}; Parameters (none) Return value 1,3)…

std::chrono::year::ok – std::chrono::year::ok Synopsis constexpr bool ok() const noexcept; (since C++20) Checks if the year value stored in *this is in the valid range, i.e., [-32767, 32767]. Return value true if the year value stored in *this is in the range [-32767, 32767]. Otherwise false.

std::chrono::year::min – std::chrono::year::min Synopsis static constexpr std::chrono::year min() noexcept; (since C++20) Returns the smallest possible year, that is, std::chrono::year(-32767). Return value std::chrono::year(-32767)

std::chrono::year::max – std::chrono::year::max Synopsis static constexpr year max() noexcept; (since C++20) Returns the largest possible year, that is, std::chrono::year(32767). Return value std::chrono::year(32767)

std::chrono::year::is_leap – std::chrono::year::is_leap Synopsis constexpr bool is_leap() const noexcept; (since C++20) Determines if *this represents a leap year in the proleptic Gregorian calendar. *this represents a leap year if the stored year value * is divisible by 4 and not divisible by 100; or * is divisible by 400. Return value true if *this represents…

std::chrono::year – std::chrono::year Synopsis Defined in header <chrono> class year; (since C++20) The class year represents a year in the proleptic_Gregorian_calendar. Its range is [-32767, 32767]. year is a TriviallyCopyable StandardLayoutType. Member functions                 constructs a year constructor (public member function) operator++ increments or decrements the year operator++(int) (public member function) operator– operator–(int)                 adds or subtracts…

std::chrono::weekday_last::weekday_last – std::chrono::weekday_last::weekday_last Synopsis explicit constexpr weekday_last(const chrono::weekday& wd) noexcept; (since C++20) Constructs a weekday_last object storing the weekday wd. Notes A more convenient way to construct a weekday_last is with weekday’s operator[], i.e., wd[std::chrono::last].

std::chrono::weekday_last::weekday – std::chrono::weekday_last::weekday Synopsis constexpr std::chrono::weekday weekday() const noexcept; (since C++20) Retrieves a copy of the std::chrono::weekday object stored in *this. Return value A copy of the std::chrono::weekday object stored in *this.