creusot_contracts/std/iter/
repeat.rs

1use crate::{prelude::*, std::iter::Repeat};
2
3impl<T> View for Repeat<T> {
4    type ViewTy = T;
5
6    #[logic(opaque)]
7    fn view(self) -> T {
8        dead
9    }
10}
11
12impl<T: Clone> IteratorSpec for Repeat<T> {
13    #[logic(open)]
14    fn completed(&mut self) -> bool {
15        pearlite! { false }
16    }
17
18    #[logic(open)]
19    fn produces(self, visited: Seq<Self::Item>, o: Self) -> bool {
20        pearlite! {
21            self == o &&
22            forall<i> 0 <= i && i < visited.len() ==> T::clone.postcondition((&self@,), visited[i])
23        }
24    }
25
26    #[logic(law)]
27    #[ensures(self.produces(Seq::empty(), self))]
28    fn produces_refl(self) {}
29
30    #[logic(law)]
31    #[requires(a.produces(ab, b))]
32    #[requires(b.produces(bc, c))]
33    #[ensures(a.produces(ab.concat(bc), c))]
34    fn produces_trans(a: Self, ab: Seq<Self::Item>, b: Self, bc: Seq<Self::Item>, c: Self) {}
35}