177 void TrieBuilder::sortAndBuild(MutableArrayRef<const Symbol *> vec,  in sortAndBuild()  argument
180   if (vec.empty())  in sortAndBuild()
186   const Symbol *pivotSymbol = vec[vec.size() / 2];  in sortAndBuild()
189   size_t j = vec.size();  in sortAndBuild()
191     int c = charAt(vec[k], pos);  in sortAndBuild()
193       std::swap(vec[i++], vec[k++]);  in sortAndBuild()
195       std::swap(vec[--j], vec[k]);  in sortAndBuild()
201   bool prefixesDiverge = i != 0 || j != vec.size();  in sortAndBuild()
210   sortAndBuild(vec.slice(0, i), node, lastPos, pos);  in sortAndBuild()
211   sortAndBuild(vec.slice(j), node, lastPos, pos);  in sortAndBuild()
219     vec = vec.slice(i, j - i);  in sortAndBuild()