rustdoc: Tweaking test generation #15000
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The collapse/unindent passes were run in the wrong order, generating different markdown for indented tests.
No need to duplicate the compiler's work! Closes rust-lang#14999
lnicola
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Jun 19, 2023
…oc, r=HKalbasi
fix: only generate trait bound for associated types in field types
Given the following definitions:
```rust
trait Trait {
type A;
type B;
type C;
}
#[derive(Clone)]
struct S<T: Trait>
where
T::A: Send,
{
qualified: <T as Trait>::B,
shorthand: T::C,
}
```
we currently expand the derive macro to:
```rust
impl<T> Clone for S<T>
where
T: Trait + Clone,
T::A: Clone,
T::B: Clone,
T::C: Clone,
{ /* ... */ }
```
This does not match how rustc expands it. Specifically, `Clone` bounds for `T::A` and `T::B` should not be generated.
The criteria for associated types to get bound seem to be 1) the associated type appears as part of field types AND 2) it's written in the shorthand form. I have no idea why rustc doesn't consider qualified associated types (there's even a comment that suggests they should be considered; see rust-lang#50730), but it's important to follow rustc.
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