Move characters from the output sequence to the input sequence.
void commit( std::size_t n);
Appends n
characters from
the start of the output sequence to the input sequence. The beginning of
the output sequence is advanced by n
characters.
Requires a preceding call prepare(x)
where x >=
n
, and no intervening operations
that modify the input or output sequence.
If n
is greater than the
size of the output sequence, the entire output sequence is moved to the
input sequence and no error is issued.