39 lines
814 B
Rust
39 lines
814 B
Rust
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pub trait MyTrait2<X> {
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type Output;
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}
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pub trait MyTrait {
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type Item;
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fn next(&mut self) -> Option<Self::Item>;
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fn fold<B, F>(self, init: B, f: F) -> B where
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Self: Sized,
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F: MyTrait2<(B, Self::Item), Output=B>;
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}
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pub struct Cloned<I>(I);
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impl<'a, T, I> MyTrait for Cloned<I> where
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T: 'a + Clone,
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I: MyTrait<Item = &'a T>
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{
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type Item = T;
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fn next(&mut self) -> Option<Self::Item> { loop {} }
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fn fold<B, F>(self, init: B, f: F) -> B where
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Self: Sized,
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F: MyTrait2<(B, Self::Item), Output=B>
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{
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loop {}
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}
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}
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pub trait MyFuture {
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type Output;
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}
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pub trait MyIntoFuture {
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type Output;
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type Fut: MyFuture<Output=Self::Output>;
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fn into_future(self) -> Self::Fut;
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fn into_future_2(self, other: Self) -> Self::Fut;
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}
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