[rustc.git] / src / doc / book / listings / ch19-advanced-features / listing-13-21-reproduced / src / lib.rs

struct Counter {
    count: u32,
}

impl Counter {
    fn new() -> Counter {
        Counter { count: 0 }
    }
}

// ANCHOR: ch19
impl Iterator for Counter {
    type Item = u32;

    fn next(&mut self) -> Option<Self::Item> {
        // --snip--
        // ANCHOR_END: ch19
        if self.count < 5 {
            self.count += 1;
            Some(self.count)
        } else {
            None
        }
    }
}
Commit	Line	Data
74b04a01 XL	1	struct Counter {
	2	count: u32,
	3	}
	4
	5	impl Counter {
	6	fn new() -> Counter {
	7	Counter { count: 0 }
	8	}
	9	}
	10
	11	// ANCHOR: ch19
	12	impl Iterator for Counter {
	13	type Item = u32;
	14
	15	fn next(&mut self) -> Option<Self::Item> {
	16	// --snip--
	17	// ANCHOR_END: ch19
	18	if self.count < 5 {
	19	self.count += 1;
	20	Some(self.count)
	21	} else {
	22	None
	23	}
	24	}
	25	}