std::chrono::local_info

< cpp‎ | chrono
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 nonexistent, then result == local_info::nonexistent, first is filled out with the std::chrono::sys_info that ends just prior to the local_time, and second is filled out with the std::chrono::sys_info that begins just after the local_time.
  • If the local_time is ambiguous, then result == local_info::ambiguous, first is filled out with the std::chrono::sys_info that ends just after the local_time, and second is filled with the std::chrono::sys_info that starts just before the local_time.

This is a low-level data structure; typical conversions from local_time to sys_time will use it implicitly rather than explicitly.

Member constants

Name Value
constexpr int unique
[static]
 ​0​
(public static member constant)
constexpr int nonexistent
[static]
 1
(public static member constant)
constexpr int ambiguous
[static]
 2
(public static member constant)

Member objects

Member object Type
result int
first, second std::chrono::sys_info

Nonmember functions

(C++20)
 outputs a local_info into a stream
(function template)

Helper classes

(C++20)
 formatting support for local_info
(class template specialization)