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rust/compiler/rustc_hir_analysis
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Matthias Krüger f0205d55ce
Rollup merge of #109166 - lcnr:define_opaque_types-explicit, r=oli-obk 
make `define_opaque_types` fully explicit

based on the idea of #108389. Moved `define_opaque_types` into the actual operations, e.g. `eq`, instead of `infcx.at` because normalization doesn't use `define_opaque_types` and even creates it's own `At` with a different `define_opaque_types` internally.

Somewhat surprisingly, coherence actually relies on `DefineOpaqueTypes::Yes` for soundness which was revealed because I've incorrectly used `DefineOpaqueTypes::No` in `equate_impl_headers`. It feels concerning that even though this is the case, we still sometimes use `DefineOpaqueTypes::No` in coherence. I did not look into this as part of this PR as it is purely changing the structure of the code without changing behavior in any way.

r? ```@oli-obk```
2023-03-16 08:57:07 +01:00
..
src Rollup merge of #109166 - lcnr:define_opaque_types-explicit, r=oli-obk 2023-03-16 08:57:07 +01:00
Cargo.toml Use ThinVec in various AST types. 2023-02-21 11:51:56 +11:00
messages.ftl Forbid the use of #[target_feature] on start 2023-03-12 14:57:38 +01:00
README.md rustc_typeck to rustc_hir_analysis 2022-09-27 10:37:23 +02:00

README.md

For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.