...one of the most highly
regarded and expertly designed C++ library projects in the
world. — Herb Sutter and Andrei
Override std::streambuf behaviour.
int_type overflow( int_type c);
Behaves according to the specification of
with the specialisation that
std::length_error is thrown if
appending the character to the input sequence would require the condition
size() > max_size() to be true.