class template

std::chrono::common_type (duration)

template <class Rep1, class Period1, class Rep2, class Period2>
class common_type<chrono::duration<Rep1,Period1>,chrono::duration<Rep2,Period2>>;

Specialization of common_type for duration

This is a specialization of the standard traits class common_type. It defines the most precise duration type between its two template arguments.

The default definition returns a duration type with common_type<Rep1,Rep2> as its first template argument and the greatest common divisor of Period1 and Period2 as its second template argument.

A custom count representation type can provide its own specialization of this template.

Template parameters

Rep1, Rep2: Count representation types.
These can either be arithmetic types, or classes emulating an arithmetic type.
Period1, Period2: Instantiations of the ratio class template that represent the count period in seconds.