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pub mod combi;
pub mod gen_range;
pub struct RangeIterator {
curr: i32,
stop: i32,
step: i32,
}
impl RangeIterator {
pub fn new(start: i32, stop: i32, step: i32) -> Self {
RangeIterator {
curr: start,
stop,
step,
}
}
}
impl Iterator for RangeIterator {
type Item = i32;
fn next(&mut self) -> Option<Self::Item> {
if self.curr >= self.stop {
return None;
}
let res = self.curr;
self.curr += self.step;
Some(res)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_works() {
let mut m = 0;
let it = RangeIterator::new(5, 12, 3);
for s in it {
m += s;
}
assert_eq!(m, 5 + 8 + 11, "Test 1");
}
}