Method find

extern/re2/re2/stringpiece.cc:28–35

}

StringPiece::size_type StringPiece::find(const StringPiece& s,
                                         size_type pos) const {
  if (pos > size_) return npos;
  const_pointer result = std::search(data_ + pos, data_ + size_,
                                     s.data_, s.data_ + s.size_);
  size_type xpos = result - data_;
  return xpos + s.size_ <= size_ ? xpos : npos;
}

StringPiece::size_type StringPiece::find(char c, size_type pos) const {
  if (size_ <= 0 || pos >= size_) return npos;