boost::algorithm::erase_first — Erase first algorithm.
// In header: <boost/algorithm/string/erase.hpp> template<typename SequenceT, typename RangeT> void erase_first(SequenceT & Input, const RangeT & Search);
Remove the first occurrence of the substring from the input. The input sequence is modified in-place.
Parameters:
Input
An input string
Search
A substring to be searched for.