std::chrono::clock_cast(3) C++ Standard Libary std::chrono::clock_cast(3) NAME std::chrono::clock_cast - std::chrono::clock_cast Synopsis Defined in header <chrono> template< class Dest, class Source, class Duration > auto clock_cast( const std::chrono::time_point<Source, Duration>& t (since C++20) ); Converts the time point t of a clock Source to an equivalent time point of the clock Dest, using std::chrono::system_clock and/or std::chrono::utc_clock as intermediaries if necessary. * If the expression std::chrono::clock_time_conversion<Dest, Source>{}(t) is well-formed, returns the result of that expression. * Otherwise, if at least one of the following two expressions are well-formed, then * If both expressions are well-formed, the conversion is ambiguous, and the program is ill-formed. * Otherwise, exactly one of the two expressions is well-formed; the result of that expression is returned. 1) std::chrono::clock_time_conversion<Dest, std::chrono::sys- tem_clock>{}( std::chrono::clock_time_conversion<std::chrono::system_clock, Source>{}(t)) 2) std::chrono::clock_time_conversion<Dest, std::chrono::utc_clock>{}( std::chrono::clock_time_conversion<std::chrono::utc_clock, Source>{}(t)) * Otherwise, if at least one of the following two expressions are well-formed, then * If both expressions are well-formed, the conversion is ambiguous, and the program is ill-formed. * Otherwise, exactly one of the two expressions is well-formed; the result of that expression is returned. 1) std::chrono::clock_time_conversion<Dest, std::chrono::utc_clock>{}( std::chrono::clock_time_conversion<std::chrono::utc_clock, std::chrono::system_clock>{}( std::chrono::clock_time_conversion<std::chrono::system_clock, Source>{}(t))) 2) std::chrono::clock_time_conversion<Dest, std::chrono::sys- tem_clock>{}( std::chrono::clock_time_conversion<std::chrono::system_clock, std::chrono::utc_clock>{}( std::chrono::clock_time_conversion<std::chrono::utc_clock, Source>{}(t))) * Otherwise, this function does not participate in overload resolu- tion. Return value The result of the conversion, determined as described above. Example This section is incomplete Reason: no example See also clock_time_conversion traits class defining how to convert time points of one clock (C++20) to another (class template) Category: * Todo no example http://cppreference.com 2024.06.10 std::chrono::clock_cast(3)
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