7a4970476e
Get rid of `check_opaque_type_well_formed` Instead, replicate it by improving the span of the opaque in `check_opaque_meets_bounds`. This has two consequences: 1. We now prefer "concrete type differs" errors, since we'll hit those first before we check the opaque is WF. 2. Spans have gotten slightly worse. Specifically, (2.) could be improved by adding a new obligation cause that explains that the definition's environment has stronger assumptions than the declaration. r? lcnr |
||
|---|---|---|
| .. | ||
| src | ||
| Cargo.toml | ||
| messages.ftl | ||
| README.md | ||
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.