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When encountering a `match` or `if` as a tail expression where the different arms do not have the same type *and* the return type of that `fn` is an `impl Trait`, check whether those arms can implement `Trait` and if so, suggest using boxed trait objects. |
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| src | ||
| Cargo.toml | ||
| README.md | ||
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.