Deduction guides for std::chrono::zoned_time

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< cpp‎ | chrono‎ | zoned time
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std::chrono::zoned_time
zoned_time( ) - > zoned_time< std::chrono::seconds > ;
(1) (since C++20)
template < class Duration >

zoned_time( std::chrono::sys_time <Duration> )

- > zoned_time< std::common_type_t <Duration, std::chrono::seconds >> ;
(2) (since C++20)
template < class TimeZonePtrOrName >
zoned_time( TimeZonePtrOrName&& ) - > zoned_time< std::chrono::seconds, /* see below */ > ;
(3) (since C++20)
template < class TimeZonePtrOrName, class Duration >

zoned_time( TimeZonePtrOrName&&, std::chrono::sys_time <Duration> )

- > zoned_time< std::common_type_t <Duration, std::chrono::seconds >, /* see below */ > ;
(4) (since C++20)
template < class TimeZonePtrOrName, class Duration >

zoned_time( TimeZonePtrOrName&&, std::chrono::local_time <Duration>,
std::chrono::choose = std:: chrono :: choose :: earliest )

- > zoned_time< std::common_type_t <Duration, std::chrono::seconds >, /* see below */ > ;
(5) (since C++20)
template < class TimeZonePtrOrName, class Duration, class TimeZonePtr2 >

zoned_time( TimeZonePtrOrName&&, std::chrono::zoned_time <Duration, TimeZonePtr2>,
std::chrono::choose = std:: chrono :: choose :: earliest )

- > zoned_time< std::common_type_t <Duration, std::chrono::seconds >, /* see below */ > ;
(6) (since C++20)

These deduction guides normalize Duration to a minimum resolution of std::chrono::seconds, and provide correct handling for time zone names specified using types convertible to std::string_view

3-6) If std::is_convertible_v <TimeZonePtrOrName, std::string_view > is true, the deduced second template argument is const std::chrono::time_zone * . Otherwise it is std::remove_cvref_t<TimeZonePtrOrName>
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