type_toppings/
iterator.rs

1pub mod map_into;
2pub mod map_opt;
3pub mod map_res;
4pub mod map_res_err;
5
6impl<I> crate::IteratorExt for I
7where
8    I: Iterator,
9{
10    fn map_into<U>(self) -> map_into::MapInto<Self, U>
11    where
12        Self: Sized,
13        Self: Iterator,
14        <Self as Iterator>::Item: Into<U>,
15    {
16        map_into::MapInto {
17            iter: self,
18            _marker: std::marker::PhantomData,
19        }
20    }
21
22    fn map_opt<T, U, F>(self, f: F) -> map_opt::MapOpt<Self, F>
23    where
24        Self: Sized,
25        Self: Iterator<Item = Option<T>>,
26        F: FnMut(T) -> U,
27    {
28        map_opt::MapOpt { iter: self, f }
29    }
30
31    fn map_res<F, T, U, E>(self, f: F) -> map_res::MapRes<Self, F>
32    where
33        Self: Sized,
34        Self: Iterator<Item = Result<T, E>>,
35        F: FnMut(T) -> U,
36    {
37        map_res::MapRes { iter: self, f }
38    }
39
40    fn map_res_err<F, T, U, E>(self, f: F) -> map_res_err::MapResErr<Self, F>
41    where
42        Self: Sized,
43        Self: Iterator<Item = Result<T, E>>,
44        F: FnMut(E) -> U,
45    {
46        map_res_err::MapResErr { iter: self, f }
47    }
48
49    fn join_as_strings(self, separator: &str) -> String
50    where
51        Self: Iterator,
52        <Self as Iterator>::Item: ToString,
53    {
54        // TODO: Use intersperse when it becomes stable
55        self.map(|x| x.to_string()).collect::<Vec<_>>().join(separator)
56    }
57}
type_toppings/iterator.rs

type_toppings/
iterator.rs
