iter_type put_unit(duration_units<CharT> const& facet, iter_type s, std::ios_base& ios, char_type fill,
duration<Rep, Period> const& d) const
{
if (facet.template is_named_unit<Period>()) {
string_type str = facet.get_unit(get_duration_style(ios), d);
s=std::copy(str.begin(), str.end(), s);
} else {
*s++ = CharT('[');
std::use_facet<std::num_put<CharT, iter_type> >(ios.getloc()).put(s, ios, fill, Period::num);
*s++ = CharT('/');
std::use_facet<std::num_put<CharT, iter_type> >(ios.getloc()).put(s, ios, fill, Period::den);
*s++ = CharT(']');
string_type str = facet.get_n_d_unit(get_duration_style(ios), d);
s=std::copy(str.begin(), str.end(), s);
}
return s;
}
/**
* Explicit construction from an i/o stream.
*
* Store a reference to the i/o stream and the value of the associated @c duration_style.
*/
explicit duration_style_io_saver(state_type &s) :
s_save_(s)
{
a_save_ = get_duration_style(s_save_);
}
