rust/compiler/rustc_trait_selection
bors cd805f09ff Auto merge of #133830 - compiler-errors:span-key, r=lcnr
Rework dyn trait lowering to stop being so intertwined with trait alias expansion

This PR reworks the trait object lowering code to stop handling trait aliases so funky, and removes the `TraitAliasExpander` in favor of a much simpler design. This refactoring is important for making the code that I'm writing in https://github.com/rust-lang/rust/pull/133397 understandable and easy to maintain, so the diagnostics regressions are IMO inevitable.

In the old trait object lowering code, we used to be a bit sloppy with the lists of traits in their unexpanded and expanded forms. This PR largely rewrites this logic to expand the trait aliases *once* and handle them more responsibly throughout afterwards.

Please review this with whitespace disabled.

r? lcnr
2025-01-21 12:33:33 +00:00
..
src Auto merge of #133830 - compiler-errors:span-key, r=lcnr 2025-01-21 12:33:33 +00:00
Cargo.toml rename rustc_attr to rustc_attr_parsing and create rustc_attr_data_structures 2024-12-16 19:08:19 +01:00
messages.ftl mir_transform: implement forced inlining 2025-01-10 18:37:54 +00:00