2.3 KiB
[time.zone.info.local]
30 Time library [time]
30.11 Time zones [time.zone]
30.11.4 Information classes [time.zone.info]
30.11.4.2 Class local_info [time.zone.info.local]
namespace std::chrono {struct local_info {static constexpr int unique = 0; static constexpr int nonexistent = 1; static constexpr int ambiguous = 2; int result; sys_info first; sys_info second; };}
[Note 1:
This type provides a low-level interface to time zone information.
Typical conversions from local_time to sys_time will use this class implicitly, not explicitly.
â end note]
Describes the result of converting a local_time to a sys_time as follows:
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When a local_time to sys_time conversion is unique,result == unique,first will be filled out with the correct sys_info, andsecond will be zero-initialized.
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If the conversion stems from a nonexistent local_time then result == nonexistent,first will be filled out with the sys_info that ends just prior to the local_time, andsecond will be filled out with the sys_info that begins just after the local_time.
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If the conversion stems from an ambiguous local_time, then result == ambiguous,first will be filled out with the sys_info that ends just after the local_time, andsecond will be filled out with the sys_info that starts just before the local_time.
template<class charT, class traits> basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& os, const local_info& r);
Effects: Streams out the local_info object r in an unspecified format.
Returns: os.