Section 3: library functions
std::chrono::month_day_last – std::chrono::month_day_last Synopsis Defined in header <chrono> class month_day_last; (since C++20) The class month_day_last represents the last day of a specific month, of some yet to be specified year. month_day_last is a TriviallyCopyable StandardLayoutType. Member functions constructs a month_day_last constructor (public member function) accesses the stored month month (public member function) checks if the…
std::chrono::month_day::ok – std::chrono::month_day::ok Synopsis constexpr bool ok() const noexcept; (since C++20) Determines whether this month_day stores a valid month-day combination. The combination is valid if month() represents a valid month (month().ok() == true), unsigned{day()} >= 1, and unsigned{day()} <= D, where D is the number of days in the month represented by month(). The number…
std::chrono::month_day::month_day – std::chrono::month_day::month_day Synopsis month_day() = default; (1)(since C++ 20) constexpr month_day(const std::chrono::month &m, const std::chrono::day &d) noexcept; (2)(since C++ 20) Constructs a month_day. 1) Default constructor leaves the stored month and day values uninitialized. 2) Constructs a month_day that stores the month m and the day d. Notes A more convenient way to construct…
std::chrono::month_day::month,std::chrono::month_day::day – std::chrono::month_day::month,std::chrono::month_day::day Synopsis constexpr std::chrono::month month() const noexcept; (1) (since C++20) constexpr std::chrono::day day() const noexcept; (1) (since C++20) Retrieves the month and day values stored in this month_day object. Return value 1) Returns the stored std::chrono::month value. 2) Returns the stored std::chrono::day value.
std::chrono::month_day – std::chrono::month_day Synopsis Defined in header <chrono> class month_day; (since C++20) The class month_day represents a specific day of a specific month, of some yet to be specified year. month_day is a TriviallyCopyable StandardLayoutType. Member functions constructs a month_day constructor (public member function) retrieve the stored month and day values month (public member function)…
std::chrono::month::operatorunsigned – std::chrono::month::operatorunsigned Synopsis explicit constexpr operator unsigned() const noexcept; (since C++20) Returns the month value stored in *this. Return value The month value stored in *this.
std::chrono::month::operator+=,std::chrono::month::operator-= – std::chrono::month::operator+=,std::chrono::month::operator-= Synopsis constexpr std::chrono::month &operator+=(const std::chrono::months &m) noexcept; (1)(since C++ 20) constexpr std::chrono::month & operator+=(const std::chrono::months &m) noexcept; (2) (since C++20) Adds or subtracts m.count() from the month value, reducing the result modulo 12 to an integer in the range [1, 12]. 1) Performs *this = *this + m; 2) Performs *this =…
std::chrono::month::operator++,std::chrono::month::operator– – std::chrono::month::operator++,std::chrono::month::operator– Synopsis constexpr std::chrono::month& operator++() noexcept; (1) (since C++20) constexpr std::chrono::month operator++(int) noexcept; (2) (since C++20) constexpr std::chrono::month& operator–() noexcept; (3) (since C++20) constexpr std::chrono::month operator–(int) noexcept; (4) (since C++20) Adds or subtracts 1 from the month value, reducing the result modulo 12 to an integer in the range [1, 12]. 1-2) Performs…
std::chrono::month::ok – std::chrono::month::ok Synopsis constexpr bool ok() const noexcept; (since C++20) Checks if the month value stored in *this is in the valid range, i.e., [1, 12]. Return value true if the month value stored in *this is in the range [1, 12]. Otherwise false.
std::chrono::month::month – std::chrono::month::month Synopsis month() = default; (1) (since C++20) explicit constexpr month(unsigned m) noexcept; (2) (since C++20) Constructs a month object. 1) Default constructor leaves the month value uninitialized. 2) If m <= 255, constructs a month object holding the month value m. Otherwise the value held is unspecified.
std::chrono::month – std::chrono::month Synopsis Defined in header <chrono> class month; (since C++20) inline constexpr std::chrono::month January{1}; (since C++20) inline constexpr std::chrono::month February{2}; (since C++20) inline constexpr std::chrono::month March{3}; (since C++20) inline constexpr std::chrono::month April{4}; (since C++20) inline constexpr std::chrono::month May{5}; (since C++20) inline constexpr std::chrono::month June{6}; (since C++20) inline constexpr std::chrono::month July{7}; (since C++20) inline…
std::chrono::locate_zone – std::chrono::locate_zone Synopsis Defined in header <chrono> const std::chrono::time_zone* locate_zone(std::string_view tz_name); (since C++20) Convenience function for locating a time zone in the time zone database. Equivalent to std::chrono::get_tzdb().locate_zone(tz_name). Exceptions std::runtime_error if the specified time zone cannot be found, or if this is the first reference to the time zone database and the time zone…
std::chrono::local_t – std::chrono::local_t Synopsis Defined in header <chrono> struct local_t {}; (since C++20) The class local_t is a pseudo-clock that is used as the first template argument to std::chrono::time_point to indicate that the time point represents local time with respect of a not-yet-specified time zone. local_time supports streaming and the full set of time point…
std::chrono::local_info – std::chrono::local_info Synopsis Defined in header <chrono> struct local_info; (since C++20) The class local_info describes the result of converting a std::chrono::local_time to a std::chrono::sys_time. * If the result of the conversion is unique, then result == local_info::unique, first is filled out with the correct std::chrono::sys_info, and second is zero-initialized. * If the local_time is…
std::chrono::link::name,std::chrono::link::target – std::chrono::link::name,std::chrono::link::target Synopsis std::string_view name() const noexcept; (1) std::string_view target() const noexcept; (2) Accesses the name and target of this link object. Return value 1) The alternative name this link object represents. 2) The name of the std::chrono::time_zone for which this link object provides an alternative name.
std::chrono::link – std::chrono::link Synopsis Defined in header <chrono> class link; (since C++20) The class link represents an alternative name for a time zone. Users cannot construct link objects. The library implementation creates link objects when it initializes the time zone database and provides const access to these objects. link is not copyable but does have…
std::chrono::leap::date – std::chrono::leap::date Synopsis constexpr std::chrono::sys_seconds date() const noexcept; Obtains the date and time of the leap second insertion. Return value A std::chrono::sys_seconds representing the date and time at which the leap second was inserted.
std::chrono::leap – std::chrono::leap Synopsis Defined in header <chrono> class leap; (since C++20) The class leap represents the date and time of a leap second insertion. Users cannot construct leap objects except by copying from existing leap objects. The library implementation creates leap objects when it initializes the time zone database and provides const access to…
std::chrono::last_spec – std::chrono::last_spec Synopsis Defined in header<chrono> struct last_spec { (since C++ 20) explicit last_spec() = default; }; inline constexpr last_spec last{}; (since C++ 20) last_spec is an empty tag type that is used in conjunction with other calendar types to indicate the last thing in a sequence. Depending on context, it may indicate the…
std::chrono::is_clock – std::chrono::is_clock Synopsis Defined in header<chrono> template <class T> struct is_clock; If T satisfies the Clock requirements, provides the member constant value equal true. For any other type, value is false. For the purpose of this trait, the extent to which an implementation determines that a type cannot meet the Clock requirements is unspecified,…