list_fn/
flatten.rs

1use super::*;
2use core::marker::PhantomData;
3
4pub struct FlattenList<I>(PhantomData<I>);
5
6impl<I> Default for FlattenList<I> {
7    fn default() -> Self {
8        FlattenList(PhantomData::default())
9    }
10}
11
12impl<I> FlatMapFn for FlattenList<I>
13where
14    I: ListFn,
15    I::Item: ListFn,
16{
17    type Input = I::Item;
18    type OutputList = I::Item;
19    fn map(&self, input: Self::Input) -> Self::OutputList {
20        input
21    }
22}
23
24pub trait Flatten
25where
26    Self: ListFn,
27    Self::Item: ListFn,
28{
29    fn flatten(self) -> FlatMapList<Self, FlattenList<Self>> {
30        self.flat_map(FlattenList::default())
31    }
32}
33
34impl<S> Flatten for S
35where
36    Self: ListFn,
37    Self::Item: ListFn,
38{
39}
list_fn/flatten.rs

list_fn/
flatten.rs
