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Rollup merge of #122829 - ShoyuVanilla:gen-block-impl-fused-iter, r=compiler-errors

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Implement `FusedIterator` for `gen` block

cc #117078
This commit is contained in:
Matthias Krüger 2024-03-22 01:07:31 +01:00 • committed by GitHub
commit 1757cb5871
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10 changed files with 105 additions and 7 deletions
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9
compiler/rustc_trait_selection/src/solve/assembly/mod.rs
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@ -215,6 +215,13 @@ pub(super) trait GoalKind<'tcx>:
goal: Goal<'tcx, Self>,
) -> QueryResult<'tcx>;
/// A coroutine (that comes from a `gen` desugaring) is known to implement
/// `FusedIterator`
fn consider_builtin_fused_iterator_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
) -> QueryResult<'tcx>;
fn consider_builtin_async_iterator_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
@ -497,6 +504,8 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
G::consider_builtin_future_candidate(self, goal)
} else if lang_items.iterator_trait() == Some(trait_def_id) {
G::consider_builtin_iterator_candidate(self, goal)
} else if lang_items.fused_iterator_trait() == Some(trait_def_id) {
G::consider_builtin_fused_iterator_candidate(self, goal)
} else if lang_items.async_iterator_trait() == Some(trait_def_id) {
G::consider_builtin_async_iterator_candidate(self, goal)
} else if lang_items.coroutine_trait() == Some(trait_def_id) {