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Rollup merge of #123638 - fmease:rustdoc-synth-auto-yeet-item-param-env-clauses, r=GuillaumeGomez

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rustdoc: synthetic auto: filter out clauses from the implementor's ParamEnv

... not just the elaborated clauses.

Fixes another regression introduced by me in #123340, oops!
Fixes https://github.com/rust-lang/rust/pull/123340#issuecomment-2034195786, cc ``@tamird.``

An earlier local iteration of branch `rustdoc-simplify-auto-trait-impl-synth` (PR #123340) contained a fix for issue #111101 before I decided to limit the scope. I must've introduced this bug when manually reverting that part of the code.

r? ``@GuillaumeGomez`` or rustdoc
This commit is contained in:
Guillaume Gomez 2024-04-09 13:39:22 +02:00 committed by GitHub
commit 2e042eabbc
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2 changed files with 15 additions and 1 deletions
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2
src/librustdoc/clean/auto_trait.rs
View File

@ -168,7 +168,7 @@ fn clean_param_env<'tcx>(
// FIXME(#111101): Incorporate the explicit predicates of the item here...
let item_predicates: FxIndexSet<_> =
tcx.predicates_of(item_def_id).predicates.iter().map(|(pred, _)| pred).collect();
tcx.param_env(item_def_id).caller_bounds().iter().collect();
let where_predicates = param_env
.caller_bounds()
.iter()

14
tests/rustdoc/synthetic_auto/supertrait-bounds.rs Normal file
View File

@ -0,0 +1,14 @@
// Check that we don't add bounds to synthetic auto trait impls that are
// already implied by the item (like supertrait bounds).
// In this case we don't want to add the bounds `T: Copy` and `T: 'static`
// to the auto trait impl because they're implied by the bound `T: Bound`
// on the implementor `Type`.
pub struct Type<T: Bound>(T);
// @has supertrait_bounds/struct.Type.html
// @has - '//*[@id="synthetic-implementations-list"]//*[@class="impl"]//h3[@class="code-header"]' \
// "impl<T> Send for Type<T>where T: Send,"
pub trait Bound: Copy + 'static {}