void stream_format_state<Ch,Tr>:: set_by_stream(const basic_ios& os) {
// set our params according to the state of this stream
flags_ = os.flags();
width_ = os.width();
precision_ = os.precision();
fill_ = os.fill();
rdstate_ = os.rdstate();
exceptions_ = os.exceptions();
}
void stream_format_state<Ch,Tr>:: apply_on (basic_ios & os,
boost::io::detail::locale_t * loc_default) const {
// set the state of this stream according to our params
if(width_ != -1)
os.width(width_);
if(precision_ != -1)
os.precision(precision_);
if(fill_ != 0)
os.fill(fill_);
os.flags(flags_);
os.clear(rdstate_);
os.exceptions(exceptions_);
#if !defined(BOOST_NO_STD_LOCALE)
if(loc_)
os.imbue(loc_.get());
else if(loc_default)
os.imbue(*loc_default);
#else
(void) loc_default; // keep compiler quiet if we don't support locales
#endif
}