116     iterator MergeTo = std::next(I);  in extendSegmentEndTo()  local
117     for (; MergeTo != segments().end() && NewEnd >= MergeTo->end; ++MergeTo)  in extendSegmentEndTo()
118       assert(MergeTo->valno == ValNo && "Cannot merge with differing values!");  in extendSegmentEndTo()
121     S->end = std::max(NewEnd, std::prev(MergeTo)->end);  in extendSegmentEndTo()
125     if (MergeTo != segments().end() && MergeTo->start <= I->end &&  in extendSegmentEndTo()
126         MergeTo->valno == ValNo) {  in extendSegmentEndTo()
127       S->end = MergeTo->end;  in extendSegmentEndTo()
128       ++MergeTo;  in extendSegmentEndTo()
132     segments().erase(std::next(I), MergeTo);  in extendSegmentEndTo()
144     iterator MergeTo = I;  in extendSegmentStartTo()  local
146       if (MergeTo == segments().begin()) {  in extendSegmentStartTo()
148         segments().erase(MergeTo, I);  in extendSegmentStartTo()
151       assert(MergeTo->valno == ValNo && "Cannot merge with differing values!");  in extendSegmentStartTo()
152       --MergeTo;  in extendSegmentStartTo()
153     } while (NewStart <= MergeTo->start);  in extendSegmentStartTo()
157     if (MergeTo->end >= NewStart && MergeTo->valno == ValNo) {  in extendSegmentStartTo()
158       segmentAt(MergeTo)->end = S->end;  in extendSegmentStartTo()
161       ++MergeTo;  in extendSegmentStartTo()
162       Segment *MergeToSeg = segmentAt(MergeTo);  in extendSegmentStartTo()
167     segments().erase(std::next(MergeTo), std::next(I));  in extendSegmentStartTo()
168     return MergeTo;  in extendSegmentStartTo()