Le 01/02/2013 13:45, Alexander Stavonin a écrit :
I guess, the solution will not work for -1 … -10
Oh, for negative steps my previous implementation is buggy indeed.
But it can be fixed:
pub pure fn range_step(lo: int, hi: int, step: int,
it: fn(int) -> bool) {
let mut i = lo;
if step > 0 {
while i < hi {
if !it(i) { break }
i += step;
}
} else if step < 0 {
while i > hi {
if !it(i) { break }
i += step;
}
} else {
fail "Got step = 0."
}
}
for range_step(-1, -11, -1) |i| { … }
--
Simon Sapin
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