bsl::basic_string::erase

Erase from this string a substring defined by the specified pair of first and last iterators within this string. Return an iterator providing modifiable access to the character at the last position prior to erasing. If no such character exists, return end(). This method invalidates existing iterators pointing to first or a subsequent position. The behavior is undefined unless first and last are both within the range [cbegin() .. cend()] and `first <= last`.