new solver cleanup + implement coherence #109447
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Some changes occurred to the core trait solver cc @rust-lang/initiative-trait-system-refactor |
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new solver cleanup + implement coherence the cleanup: - change `Certainty::unify_and` to consider ambig + overflow to be ambig - rename `trait_candidate_should_be_dropped_in_favor_of` to `candidate_should_be_dropped_in_favor_of` - remove outdated fixme For coherence I mostly just add an ambiguous candidate if the current trait ref is unknowable. I am doing the same for reservation impl where I also just add an ambiguous candidate.
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…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#108954 (rustdoc: handle generics better when matching notable traits) - rust-lang#109203 (refactor/feat: refactor identifier parsing a bit) - rust-lang#109213 (Eagerly intern and check CrateNum/StableCrateId collisions) - rust-lang#109358 (rustc: Remove unused `Session` argument from some attribute functions) - rust-lang#109359 (Update stdarch) - rust-lang#109378 (Remove Ty::is_region_ptr) - rust-lang#109423 (Use region-erased self type during IAT selection) - rust-lang#109447 (new solver cleanup + implement coherence) - rust-lang#109501 (make link clickable) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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the cleanup:
Certainty::unify_andto consider ambig + overflow to be ambigtrait_candidate_should_be_dropped_in_favor_oftocandidate_should_be_dropped_in_favor_ofFor coherence I mostly just add an ambiguous candidate if the current trait ref is unknowable. I am doing the same for reservation impl where I also just add an ambiguous candidate.