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Add zoned_traits
* zoned_traits is SFINEA-friendly. * zoned_traits is specialized on const time_zone* to call locate_zone. * zoned_time accesses the database via zoned_traits<TimeZonePtr>. * Clients with custom time zone databases can specialize zoned_traits.
This commit is contained in:
Howard Hinnant
parent
d4d6eda861
commit
80a142407a
597
tz.h
597
tz.h
@ -297,6 +297,57 @@ DATE_API const time_zone* locate_zone(const std::string& tz_name);
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DATE_API const time_zone* current_zone();
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template <class T>
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struct zoned_traits
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{
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};
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template <>
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struct zoned_traits<const time_zone*>
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{
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static
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const time_zone*
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default_zone()
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{
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return date::locate_zone("UTC");
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}
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#if HAS_STRING_VIEW
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static
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const time_zone*
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locate_zone(std::string_view name)
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{
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return date::locate_zone(name);
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}
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#else // !HAS_STRING_VIEW
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static
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const time_zone*
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locate_zone(const std::string& name)
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{
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return date::locate_zone(name);
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}
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static
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const time_zone*
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locate_zone(const char* name)
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{
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return date::locate_zone(name);
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}
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#endif // !HAS_STRING_VIEW
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};
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template <class Duration, class TimeZonePtr>
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class zoned_time;
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template <class Duration1, class Duration2, class TimeZonePtr>
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bool
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operator==(const zoned_time<Duration1, TimeZonePtr>& x,
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const zoned_time<Duration2, TimeZonePtr>& y);
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template <class Duration, class TimeZonePtr = const time_zone*>
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class zoned_time
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{
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@ -308,13 +359,36 @@ private:
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sys_time<duration> tp_;
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public:
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zoned_time();
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zoned_time(const sys_time<Duration>& st);
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template <class T = TimeZonePtr,
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class = decltype(zoned_traits<T>::default_zone())>
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zoned_time();
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template <class T = TimeZonePtr,
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class = decltype(zoned_traits<T>::default_zone())>
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zoned_time(const sys_time<Duration>& st);
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explicit zoned_time(TimeZonePtr z);
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#if HAS_STRING_VIEW
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explicit zoned_time(const std::string_view& name);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string_view()))
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>::value
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>::type>
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explicit zoned_time(std::string_view name);
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#else
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explicit zoned_time(const std::string& name);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string()))
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>::value
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>::type>
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explicit zoned_time(const std::string& name);
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#endif
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template <class Duration2,
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@ -326,28 +400,223 @@ public:
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zoned_time(const zoned_time<Duration2, TimeZonePtr>& zt) NOEXCEPT;
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zoned_time(TimeZonePtr z, const sys_time<Duration>& st);
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zoned_time(TimeZonePtr z, const local_time<Duration>& tp);
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zoned_time(TimeZonePtr z, const local_time<Duration>& tp, choose c);
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zoned_time(TimeZonePtr z, const zoned_time<Duration, TimeZonePtr>& zt);
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zoned_time(TimeZonePtr z, const zoned_time<Duration, TimeZonePtr>& zt, choose);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_convertible
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<
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decltype(std::declval<T&>()->to_sys(local_time<Duration>{})),
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sys_time<duration>
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>::value
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>::type>
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zoned_time(TimeZonePtr z, const local_time<Duration>& tp);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_convertible
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<
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decltype(std::declval<T&>()->to_sys(local_time<Duration>{},
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choose::earliest)),
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sys_time<duration>
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>::value
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>::type>
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zoned_time(TimeZonePtr z, const local_time<Duration>& tp, choose c);
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zoned_time(TimeZonePtr z, const zoned_time& zt);
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zoned_time(TimeZonePtr z, const zoned_time& zt, choose);
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#if HAS_STRING_VIEW
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zoned_time(std::string_view name, const sys_time<Duration>& st);
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zoned_time(std::string_view name, const local_time<Duration>& tp);
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zoned_time(std::string_view name, const local_time<Duration>& tp, choose c);
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zoned_time(std::string_view name, const zoned_time<Duration, TimeZonePtr>& zt);
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zoned_time(std::string_view name, const zoned_time<Duration, TimeZonePtr>& zt, choose);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string_view())),
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sys_time<Duration>
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>::value
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>::type>
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zoned_time(std::string_view name, const sys_time<Duration>& st);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string_view())),
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local_time<Duration>
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>::value
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>::type>
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zoned_time(std::string_view name, const local_time<Duration>& tp);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string_view())),
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local_time<Duration>,
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choose
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>::value
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>::type>
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zoned_time(std::string_view name, const local_time<Duration>& tp, choose c);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string_view())),
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zoned_time
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>::value
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>::type>
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zoned_time(std::string_view name, const zoned_time& zt);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string_view())),
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zoned_time,
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choose
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>::value
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>::type>
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zoned_time(std::string_view name, const zoned_time& zt, choose);
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#else // !HAS_STRING_VIEW
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zoned_time(const std::string& name, const sys_time<Duration>& st);
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zoned_time(const char* name, const sys_time<Duration>& st);
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zoned_time(const std::string& name, const local_time<Duration>& tp);
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zoned_time(const char* name, const local_time<Duration>& tp);
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zoned_time(const std::string& name, const local_time<Duration>& tp, choose c);
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zoned_time(const char* name, const local_time<Duration>& tp, choose c);
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zoned_time(const std::string& name, const zoned_time<Duration, TimeZonePtr>& zt);
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zoned_time(const char* name, const zoned_time<Duration, TimeZonePtr>& zt);
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zoned_time(const std::string& name, const zoned_time<Duration, TimeZonePtr>& zt, choose);
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zoned_time(const char* name, const zoned_time<Duration, TimeZonePtr>& zt, choose);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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sys_time<Duration>
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>::value
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>::type>
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zoned_time(const std::string& name, const sys_time<Duration>& st);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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sys_time<Duration>
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>::value
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>::type>
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zoned_time(const char* name, const sys_time<Duration>& st);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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local_time<Duration>
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>::value
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>::type>
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zoned_time(const std::string& name, const local_time<Duration>& tp);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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local_time<Duration>
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>::value
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>::type>
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zoned_time(const char* name, const local_time<Duration>& tp);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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local_time<Duration>,
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choose
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>::value
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>::type>
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zoned_time(const std::string& name, const local_time<Duration>& tp, choose c);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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local_time<Duration>,
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choose
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>::value
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>::type>
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zoned_time(const char* name, const local_time<Duration>& tp, choose c);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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zoned_time
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>::value
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>::type>
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zoned_time(const std::string& name, const zoned_time& zt);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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zoned_time
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>::value
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>::type>
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zoned_time(const char* name, const zoned_time& zt);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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zoned_time,
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choose
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>::value
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>::type>
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zoned_time(const std::string& name, const zoned_time& zt, choose);
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template <class T = TimeZonePtr,
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class = typename std::enable_if
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<
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std::is_constructible
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<
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zoned_time,
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decltype(zoned_traits<T>::locate_zone(std::string())),
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zoned_time,
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choose
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>::value
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>::type>
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zoned_time(const char* name, const zoned_time& zt, choose);
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#endif // !HAS_STRING_VIEW
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zoned_time& operator=(const sys_time<Duration>& st);
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@ -933,16 +1202,40 @@ DATE_API bool remote_install(const std::string& version);
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// zoned_time
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namespace detail
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{
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template <class T>
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inline
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T*
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to_raw_pointer(T* p) noexcept
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{
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return p;
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}
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template <class Pointer>
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inline
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auto
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to_raw_pointer(Pointer p) noexcept
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-> decltype(detail::to_raw_pointer(p.operator->()))
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{
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return detail::to_raw_pointer(p.operator->());
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}
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} // namespace detail
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template <class Duration, class TimeZonePtr>
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template <class, class>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time()
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: zone_(locate_zone("UTC"))
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: zone_(zoned_traits<TimeZonePtr>::default_zone())
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{}
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template <class Duration, class TimeZonePtr>
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template <class, class>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(const sys_time<Duration>& st)
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: zone_(locate_zone("UTC"))
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: zone_(zoned_traits<TimeZonePtr>::default_zone())
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, tp_(st)
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{}
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@ -950,25 +1243,27 @@ template <class Duration, class TimeZonePtr>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z)
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: zone_(std::move(z))
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{assert(zone_ != nullptr);}
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{assert(detail::to_raw_pointer(zone_) != nullptr);}
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#if HAS_DEDUCTION_GUIDES
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#if HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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template <class, class>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string_view& name)
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: zoned_time(locate_zone(name))
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zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name)
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: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name))
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{}
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#else
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#else // !HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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template <class, class>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name)
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: zoned_time(locate_zone(name))
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: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name))
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{}
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#endif
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#endif // !HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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template <class Duration2, class>
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@ -980,104 +1275,36 @@ zoned_time<Duration, TimeZonePtr>::zoned_time(const zoned_time<Duration2, TimeZo
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template <class Duration, class TimeZonePtr>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const sys_time<Duration>& st)
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: zone_(std::move(z))
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, tp_(st)
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{}
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template <class Duration, class TimeZonePtr>
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template <class, class>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const local_time<Duration>& t)
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: zone_(std::move(z))
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, tp_(z->to_sys(t))
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{}
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#if HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name, const local_time<Duration>& t)
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: zoned_time(locate_zone(name), t)
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{}
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#else // !HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name, const local_time<Duration>& t)
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: zoned_time(locate_zone(name), t)
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, tp_(zone_->to_sys(t))
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{}
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template <class Duration, class TimeZonePtr>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name, const local_time<Duration>& t)
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: zoned_time(locate_zone(name), t)
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{}
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#endif // HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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template <class, class>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const local_time<Duration>& t,
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choose c)
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choose c)
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: zone_(std::move(z))
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, tp_(z->to_sys(t, c))
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{}
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#if HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name, const local_time<Duration>& t,
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choose c)
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: zoned_time(locate_zone(name), t, c)
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{}
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#else // !HAS_STRING_VIEW
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template <class Duration, class TimeZonePtr>
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inline
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zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name, const local_time<Duration>& t,
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choose c)
|
||||
: zoned_time(locate_zone(name), t, c)
|
||||
, tp_(zone_->to_sys(t, c))
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name, const local_time<Duration>& t,
|
||||
choose c)
|
||||
: zoned_time(locate_zone(name), t, c)
|
||||
{}
|
||||
|
||||
#endif // !HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const zoned_time<Duration, TimeZonePtr>& zt)
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z,
|
||||
const zoned_time<Duration, TimeZonePtr>& zt)
|
||||
: zone_(std::move(z))
|
||||
, tp_(zt.tp_)
|
||||
{}
|
||||
|
||||
#if HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
|
||||
const zoned_time<Duration, TimeZonePtr>& zt)
|
||||
: zoned_time(locate_zone(name), zt)
|
||||
{}
|
||||
|
||||
#else // !HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
|
||||
const zoned_time<Duration, TimeZonePtr>& zt)
|
||||
: zoned_time(locate_zone(name), zt)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
|
||||
const zoned_time<Duration, TimeZonePtr>& zt)
|
||||
: zoned_time(locate_zone(name), zt)
|
||||
{}
|
||||
|
||||
#endif // !HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z,
|
||||
@ -1088,60 +1315,126 @@ zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z,
|
||||
#if HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
|
||||
const zoned_time<Duration, TimeZonePtr>& zt, choose c)
|
||||
: zoned_time(locate_zone(name), zt, c)
|
||||
const sys_time<Duration>& st)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), st)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
|
||||
const local_time<Duration>& t)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
|
||||
const local_time<Duration>& t, choose c)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t, c)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name, const zoned_time& zt)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
|
||||
const zoned_time& zt, choose c)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt, c)
|
||||
{}
|
||||
|
||||
#else // !HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
|
||||
const zoned_time<Duration, TimeZonePtr>& zt, choose c)
|
||||
: zoned_time(locate_zone(name), zt, c)
|
||||
const sys_time<Duration>& st)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), st)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
|
||||
const zoned_time<Duration, TimeZonePtr>& zt, choose c)
|
||||
: zoned_time(locate_zone(name), zt, c)
|
||||
{}
|
||||
|
||||
#endif // !HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const sys_time<Duration>& st)
|
||||
: zone_(std::move(z))
|
||||
, tp_(st)
|
||||
{}
|
||||
|
||||
#if HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name, const sys_time<Duration>& st)
|
||||
: zoned_time(locate_zone(name), st)
|
||||
{}
|
||||
|
||||
#else // !HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name, const sys_time<Duration>& st)
|
||||
: zoned_time(locate_zone(name), st)
|
||||
const sys_time<Duration>& st)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), st)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name, const sys_time<Duration>& st)
|
||||
: zoned_time(locate_zone(name), st)
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
|
||||
const local_time<Duration>& t)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t)
|
||||
{}
|
||||
|
||||
#endif // !HAS_STRING_VIEW
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
|
||||
const local_time<Duration>& t)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
|
||||
const local_time<Duration>& t, choose c)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t, c)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
|
||||
const local_time<Duration>& t, choose c)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t, c)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
|
||||
const zoned_time& zt)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name, const zoned_time& zt)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
|
||||
const zoned_time& zt, choose c)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt, c)
|
||||
{}
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
template <class, class>
|
||||
inline
|
||||
zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
|
||||
const zoned_time& zt, choose c)
|
||||
: zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt, c)
|
||||
{}
|
||||
|
||||
#endif // HAS_STRING_VIEW
|
||||
|
||||
template <class Duration, class TimeZonePtr>
|
||||
inline
|
||||
@ -1227,7 +1520,13 @@ make_zoned(const sys_time<Duration>& tp)
|
||||
template <class TimeZonePtr,
|
||||
class = typename std::enable_if
|
||||
<
|
||||
std::is_class<typename std::decay<decltype(*std::declval<TimeZonePtr&>())>::type>{}
|
||||
std::is_class
|
||||
<
|
||||
typename std::decay
|
||||
<
|
||||
decltype(*detail::to_raw_pointer(std::declval<TimeZonePtr&>()))
|
||||
>::type
|
||||
>{}
|
||||
>::type
|
||||
>
|
||||
inline
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user