The
hh_mm_ss class template
splits a
duration
into a multi-field time structure
hours:
minutes:
seconds and
possibly
subseconds,
where
subseconds will be a duration unit
based on a non-positive power of 10
.The
Duration template parameter dictates the precision
to which the time is split
.A
hh_mm_ss models negative durations
with a distinct
is_negative getter
that returns
true when the input duration is negative
.The individual duration fields always return non-negative durations
even when
is_negative() indicates
the structure is representing a negative duration
.