224                 SkASSERT(fTail && !(*fTail));  in append()
225                 *fTail = alloc->make<Node>(a, b, c);  in append()
226                 fTail = &(*fTail)->fNext;  in append()
232             SkASSERT(fTail && !(*fTail));  in concat()
234                 *fTail = list.fHead;  in concat()
235                 fTail = list.fTail;  in concat()
238                 list.fTail = &list.fHead;  in concat()
245         Node** fTail = &fHead;  variable
295     VertexList() : fHead(nullptr), fTail(nullptr) {}  in VertexList()
296     VertexList(Vertex* head, Vertex* tail) : fHead(head), fTail(tail) {}  in VertexList()
298     Vertex* fTail;  member
300     void append(Vertex* v) { insert(v, fTail, nullptr); }  in append()
305         if (fTail) {  in append()
306             fTail->fNext = list.fHead;  in append()
307             list.fHead->fPrev = fTail;  in append()
311         fTail = list.fTail;  in append()
316         if (fHead && fTail) {  in close()
317             fTail->fNext = fHead;  in close()
318             fHead->fPrev = fTail;  in close()
427     EdgeList() : fHead(nullptr), fTail(nullptr) {}  in EdgeList()
429     Edge* fTail;  member
432     void append(Edge* e) { insert(e, fTail, nullptr); }  in append()
440         if (fHead && fTail) {  in close()
441             fTail->fRight = fHead;  in close()
442             fHead->fLeft = fTail;  in close()
471     Vertex* lastVertex() const { return fTail ? fTail->fLastEdge->fBottom : fFirstVertex; }  in lastVertex()
475     MonotonePoly* fTail;  member