rust/compiler/rustc_trait_selection
bors 9d79cd5f79 Auto merge of #122747 - Urgau:non-local-defs_perfect_impl, r=lcnr
Implement T-types suggested logic for perfect non-local impl detection

This implement [T-types suggested logic](https://github.com/rust-lang/rust/issues/121621#issuecomment-1976826895) for perfect non-local impl detection:

> for each impl, instantiate all local types with inference vars and then assemble candidates for that goal, if there are more than 1 (non-private impls), it does not leak

This extension to the current logic is meant to address issues reported in https://github.com/rust-lang/rust/issues/121621.

This PR also re-enables the lint `non_local_definitions` to warn-by-default.

Implementation was discussed in this [zulip thread](https://rust-lang.zulipchat.com/#narrow/stream/144729-t-types/topic/Implementing.20new.20non-local.20impl.20defs.20logic).

Fixes https://github.com/rust-lang/rust/issues/121621
Fixes https://github.com/rust-lang/rust/issues/121746

r? `@lcnr` *(feel free to re-roll)*
2024-04-05 20:09:57 +00:00
..
src Auto merge of #122747 - Urgau:non-local-defs_perfect_impl, r=lcnr 2024-04-05 20:09:57 +00:00
Cargo.toml bump itertools to 0.12 2024-03-08 12:34:05 +03:00
messages.ftl Make #[diagnostic::on_unimplemented] format string parsing more robust 2024-03-21 08:27:26 +01:00