256     Iter(GrTRecorder& recorder) : fBlock(recorder.fHeadBlock), fPosition(0), fItem(NULL) {}  in Iter()
259         while (fPosition >= fBlock->fBack) {  in next()
260             SkASSERT(fPosition == fBlock->fBack);  in next()
265             fPosition = 0;  in next()
268         Header* header = reinterpret_cast<Header*>(&(*fBlock)[fPosition]);  in next()
269         fItem = reinterpret_cast<TBase*>(&(*fBlock)[fPosition + length_of<Header>::kValue]);  in next()
270         fPosition += header->fTotalLength;  in next()
283     int       fPosition;  variable
305         fPosition = fBlock->fBack - lastHeader->fTotalLength;  in ReverseIter()
309         Header* header = reinterpret_cast<Header*>(&(*fBlock)[fPosition]);  in previous()
311         while (0 == fPosition) {  in previous()
317             fPosition = fBlock->fBack;  in previous()
320         fPosition -= header->fPrevLength;  in previous()
321         SkASSERT(fPosition >= 0);  in previous()
323         fItem = reinterpret_cast<TBase*>(&(*fBlock)[fPosition + length_of<Header>::kValue]);  in previous()
332     int       fPosition;  variable