leap_second class

A leap_second represents a date and a value for an inserted leap second. The library creates leap_second objects as part of its time zone database initialization. It provides const access to the created objects. You can't construct or copy a leap_second object, and use of the default move constructor or default move assignment operator results in undefined behavior.

Syntax

class leap_second  // Since C++20

Members

Name	Description
Constructor	Construct a leap_second
date	Gets the date and time when the leap second was inserted.
value	Gets the positive or negative number of leap seconds inserted.

Requirements

Header: <chrono>

Microsoft C++ supports the leap_second class starting in Visual Studio 2019 version 16.10. The leap_second class is a C++20 feature. The /std:c++latest compiler option is required.

An international standards body specifies when new leap seconds should be accounted for. A database of these changes was added starting in Windows 10 version 1809 and later, and Windows Server 2019 and later.

Namespace: std::chrono

Compiler Option: /std:c++latest

Constructor

Construct a leap_second.

leap_second(const leap_second& ls) = default;

Parameters

ls
The leap_second that this object will be a copy of.

Remarks

You can't construct leap_second objects except by copying an existing leap_second. leap_second instances are provided by the library. You typically don't create them.

date

Gets the date and time when the leap second was inserted.

constexpr sys_seconds date() const noexcept;  // Since C++20

Return value

Returns a date containing the date and time when the leap second was inserted.

Remarks

Microsoft C++ supports leap_second::date starting in Visual Studio 2019 version 16.10. The function is a C++20 feature that requires the /std:c++latest compiler option.

name

Gets the name of this leap_second.

constexpr seconds value() const noexcept;  // Since C++20

Return value

Returns +1s or -1s to indicate whether a positive or negative leap second was inserted.

Remarks

Microsoft C++ supports leap_second::value starting in Visual Studio 2019 version 16.10. The function is a C++20 feature that requires the /std:c++latest compiler option.

See also

<chrono>
get_leap_second_info function
leap_second_info struct
Header files reference