Effects: The first form steps through the sequence from
pattern
to
pat_end,
identifying characters that are part of a format sequence
. Each character that is not part of a format sequence is written to
s
immediately, and each format sequence, as it is identified, results in
a call to
do_put;
thus, format elements and other characters are interleaved in the output
in the order in which they appear in the pattern
. Format sequences are identified by converting each character
c
to a
char
value as if by
ct.narrow(c, 0),
where
ct
is a reference to
ctype<charT>
obtained from
str.getloc(). The first character of each sequence is equal to
'%',
followed by an optional modifier character
mod
and a format specifier character
spec
as defined for the function
strftime. If no modifier character is present,
mod
is zero
. For each valid format sequence identified, calls
do_put(s, str, fill, t, spec, mod).