Now the external material file dialog shows the file types defined in the
template again. Before this fix it did only show "All files (*)".
I don't know what the old syntax was supposed to do or whether it ever worked
with boost::regex, but with std::regex the new one is correct.
// Everything from the start of the input to
// the start of the match.
- parse_filter(string(what[-1].first, what[-1].second));
+ parse_filter(string(it, what[0].first));
// Increment the iterator to the end of the match.
it += distance(it, what[0].second);