Created
November 11, 2018 13:24
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| struct CFor<A, B, C>(A, B, C); | |
| impl<A, B, C> Iterator for CFor<A, B, C> where A: Clone, B: Fn(&A) -> bool, C: Fn(&mut A) { | |
| type Item = A; | |
| fn next(&mut self) -> Option<A> { | |
| if !self.1(&self.0) { | |
| return None; | |
| } | |
| let result = self.0.clone(); | |
| self.2(&mut self.0); | |
| Some(result) | |
| } | |
| } | |
| fn cfor<A, B, C>(a: A, b: B, c: C) -> CFor<A, B, C> where A: Clone, B: Fn(&A) -> bool, C: Fn(&mut A) { | |
| CFor(a, b, c) | |
| } | |
| fn main() { | |
| for x in cfor(0, |x| *x < 10, |x| *x += 1) { | |
| println!("{}", x); | |
| } | |
| } |
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