Function template var_string_to_int
boost::date_time::var_string_to_int — Helper function for parsing varied length strings into integers.
Synopsis
template<typename int_type, typename charT>
int_type var_string_to_int(std::istreambuf_iterator< charT > & itr,
std::istreambuf_iterator< charT > & stream_end,
unsigned int max_length);
Description
Will consume 'max_length' characters from stream only if those characters are digits. Returns '-1' if no number can be parsed. Will not parse a number preceeded by a '+' or '-'.