/
Iter.go
46 lines (37 loc) · 919 Bytes
/
Iter.go
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package dataListGo
func iterL(L *List, last *ListElm, fn LRFN) {
iterLR(L.Head(), last, goNext, fn)
}
func iterR(L *List, last *ListElm, fn LRFN) {
iterLR(L.Last(), last, goPrev, fn)
}
func iterLR(start, last *ListElm, lr LR, fn LRFN) {
for v := start ; v != last; v = lr(v) {
fn(v)
}
}
/*
* iteration with the ability to break out
*/
func iterLbreak(L *List, last *ListElm, fn LRFNBreak, defaultcb FN) {
iterLRbreak(L.Head(), last, goNext, fn, defaultcb)
}
func iterRbreak(L *List, last *ListElm, fn LRFNBreak, defaultcb FN) {
iterLRbreak(L.Last(), last, goPrev, fn, defaultcb)
}
func iterLRbreak(start, last *ListElm, lr LR, fn LRFNBreak, defaultcb FN) {
brk := false
for v := start ; v != last ; v = lr(v) {
fn(v, &brk)
if brk == true {
return
}
}
defaultcb()
}
func goNext(el *ListElm) (*ListElm) {
return el.GetNext()
}
func goPrev(el *ListElm) (*ListElm) {
return el.GetPrev()
}