164     iterator MergeTo = std::next(I);  in extendSegmentEndTo()  local
165     for (; MergeTo != segments().end() && NewEnd >= MergeTo->end; ++MergeTo)  in extendSegmentEndTo()
166       assert(MergeTo->valno == ValNo && "Cannot merge with differing values!");  in extendSegmentEndTo()
169     S->end = std::max(NewEnd, std::prev(MergeTo)->end);  in extendSegmentEndTo()
173     if (MergeTo != segments().end() && MergeTo->start <= I->end &&  in extendSegmentEndTo()
174         MergeTo->valno == ValNo) {  in extendSegmentEndTo()
175       S->end = MergeTo->end;  in extendSegmentEndTo()
176       ++MergeTo;  in extendSegmentEndTo()
180     segments().erase(std::next(I), MergeTo);  in extendSegmentEndTo()
192     iterator MergeTo = I;  in extendSegmentStartTo()  local
194       if (MergeTo == segments().begin()) {  in extendSegmentStartTo()
196         segments().erase(MergeTo, I);  in extendSegmentStartTo()
199       assert(MergeTo->valno == ValNo && "Cannot merge with differing values!");  in extendSegmentStartTo()
200       --MergeTo;  in extendSegmentStartTo()
201     } while (NewStart <= MergeTo->start);  in extendSegmentStartTo()
205     if (MergeTo->end >= NewStart && MergeTo->valno == ValNo) {  in extendSegmentStartTo()
206       segmentAt(MergeTo)->end = S->end;  in extendSegmentStartTo()
209       ++MergeTo;  in extendSegmentStartTo()
210       Segment *MergeToSeg = segmentAt(MergeTo);  in extendSegmentStartTo()
215     segments().erase(std::next(MergeTo), std::next(I));  in extendSegmentStartTo()
216     return MergeTo;  in extendSegmentStartTo()