std::chrono::get_tzdb_list, std::chrono::get_tzdb, std::chrono::remote_version, std::chrono::
From cppreference.com
|
std::chrono::tzdb_list
& get_tzdb_list(
)
;
|
(1) | (since C++20) |
|
const
std::chrono::tzdb
& get_tzdb(
)
;
|
(2) | (since C++20) |
|
std::string remote_version();
|
(3) | (since C++20) |
|
const
std::chrono::tzdb
& reload_tzdb(
)
;
|
(4) | (since C++20) |
These functions provide access to the program-wide time zone database.
1) Returns a reference to the global std::chrono::tzdb_list singleton. If this is the first access to the database, initialize the database. After the initialization, the database will hold a single initialized std::chrono::tzdb
2) Returns a reference to the first std::chrono::tzdb object held by the
tzdb_list singleton. Equivalent to
std::
chrono
::
get_tzdb_list
(
).front
(
)
3) Returns a string containing the latest remote database version.
4) If
remote_version(
)
!
= get_tzdb(
).version
, pushes a new
tzdb object representing the remote database to the front of the tzdb_list singleton referenced by get_tzdb_list(). Otherwise there are no effects. No references, pointers or iterators are invalidated. Calling this function concurrently with get_tzdb_list().front() or
get_tzdb_list().erase_after()
Exceptions
1)
std::runtime_error if for any reason a reference to a
tzdb_list containing one or more valid tzdb
Return value
1) A reference to the global std::chrono::tzdb_list singleton.
2)
std::
chrono
::
get_tzdb_list
(
).front
(
)
3) A string containing the latest remote database version.
4)
std::
chrono
::
get_tzdb_list
(
).front
(
)