Fold item bounds before proving them in check_type_bounds in new solver
#125786
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| let trait_projection_ty = Ty::new_projection(tcx, trait_ty.def_id, rebased_args); | ||
| let impl_identity_ty = tcx.type_of(impl_ty.def_id).instantiate_identity(); |
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move this into the next_solver branch?
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then it happens once per for mut obligation in util::elaborate(tcx, obligations) {.
I could invert the if statement, and duplicate the for loop?
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you're right, didn't see the for loop 👍
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@bors r+ rollup |
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…r=lcnr Fold item bounds before proving them in `check_type_bounds` in new solver Vaguely confident that this is sufficient to prevent rust-lang/trait-system-refactor-initiative#46 and rust-lang/trait-system-refactor-initiative#62. This is not the "correct" solution, but will probably suffice until coinduction, at which point we implement the right solution (`check_type_bounds` must prove `Assoc<...> alias-eq ConcreteType`, normalizing requires proving item bounds). r? lcnr
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…lcnr Fold item bounds before proving them in `check_type_bounds` in new solver Vaguely confident that this is sufficient to prevent rust-lang/trait-system-refactor-initiative#46 and rust-lang/trait-system-refactor-initiative#62. This is not the "correct" solution, but will probably suffice until coinduction, at which point we implement the right solution (`check_type_bounds` must prove `Assoc<...> alias-eq ConcreteType`, normalizing requires proving item bounds). r? lcnr
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…iaskrgr Rollup of 4 pull requests Successful merges: - rust-lang#125635 (Rename HIR `TypeBinding` to `AssocItemConstraint` and related cleanup) - rust-lang#125774 (Avoid unwrap diag.code directly in note_and_explain_type_err) - rust-lang#125786 (Fold item bounds before proving them in `check_type_bounds` in new solver) - rust-lang#125790 (Don't recompute `tail` in `lower_stmts`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#125786 - compiler-errors:fold-item-bounds, r=lcnr Fold item bounds before proving them in `check_type_bounds` in new solver Vaguely confident that this is sufficient to prevent rust-lang/trait-system-refactor-initiative#46 and rust-lang/trait-system-refactor-initiative#62. This is not the "correct" solution, but will probably suffice until coinduction, at which point we implement the right solution (`check_type_bounds` must prove `Assoc<...> alias-eq ConcreteType`, normalizing requires proving item bounds). r? lcnr
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Vaguely confident that this is sufficient to prevent rust-lang/trait-system-refactor-initiative#46 and rust-lang/trait-system-refactor-initiative#62.
This is not the "correct" solution, but will probably suffice until coinduction, at which point we implement the right solution (
check_type_boundsmust proveAssoc<...> alias-eq ConcreteType, normalizing requires proving item bounds).r? lcnr