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Rollup merge of #127437 - compiler-errors:uplift-trait-ref-is-knowable, r=lcnr

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Uplift trait ref is knowable into `rustc_next_trait_solver`

Self-explanatory. Eliminates one more delegate method.

r? lcnr cc ``@fmease``
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许杰友 Jieyou Xu (Joe) 2024-07-08 13:04:32 +08:00 • committed by GitHub
commit 928d71f17b
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18 changed files with 520 additions and 480 deletions
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compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -1523,7 +1523,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
// bound regions.
let trait_ref = predicate.skip_binder().trait_ref;
coherence::trait_ref_is_knowable::<!>(self.infcx, trait_ref, |ty| Ok(ty)).unwrap()
coherence::trait_ref_is_knowable(self.infcx, trait_ref, |ty| Ok::<_, !>(ty)).into_ok()
}
/// Returns `true` if the global caches can be used.