12dc24f460
This commit is a response to feedback on the displayed type signatures results, by making generics act stricter. Generics are tightened by making order significant. This means `Vec<Allocator>` now matches only with a true vector of allocators, instead of matching the second type param. It also makes unboxing within generics stricter, so `Result<A, B>` only matches if `B` is in the error type and `A` is in the success type. The top level of the function search is unaffected. Find the discussion on: * <https://rust-lang.zulipchat.com/#narrow/stream/393423-t-rustdoc.2Fmeetings/topic/meeting.202024-07-08/near/449965149> * <https://github.com/rust-lang/rust/pull/124544#issuecomment-2204272265> * <https://rust-lang.zulipchat.com/#narrow/channel/266220-t-rustdoc/topic/deciding.20on.20semantics.20of.20generics.20in.20rustdoc.20search/near/476841363>
48 lines
916 B
Rust
48 lines
916 B
Rust
#![feature(rustdoc_internals)]
|
|
|
|
pub trait MyTrait2<X> {
|
|
type Output;
|
|
}
|
|
|
|
pub trait MyTrait {
|
|
type Item;
|
|
fn next(&mut self) -> Option<Self::Item>;
|
|
fn fold<B, F>(self, init: B, f: F) -> B
|
|
where
|
|
Self: Sized,
|
|
F: MyTrait2<(B, Self::Item), Output = B>;
|
|
}
|
|
|
|
pub struct Cloned<I>(I);
|
|
|
|
impl<'a, T, I> MyTrait for Cloned<I>
|
|
where
|
|
T: 'a + Clone,
|
|
I: MyTrait<Item = &'a T>,
|
|
{
|
|
type Item = T;
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
loop {}
|
|
}
|
|
fn fold<B, F>(self, init: B, f: F) -> B
|
|
where
|
|
Self: Sized,
|
|
F: MyTrait2<(B, Self::Item), Output = B>,
|
|
{
|
|
loop {}
|
|
}
|
|
}
|
|
|
|
#[doc(search_unbox)]
|
|
pub trait MyFuture {
|
|
type Output;
|
|
}
|
|
|
|
#[doc(search_unbox)]
|
|
pub trait MyIntoFuture {
|
|
type Output;
|
|
type Fut: MyFuture<Output = Self::Output>;
|
|
fn into_future(self) -> Self::Fut;
|
|
fn into_future_2(self, other: Self) -> Self::Fut;
|
|
}
|