Fix regressed test due to rust-lang/rust#78461 #1144
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One concrete example is when we have a partially resolved generic type which calls a `Self`-returning method, e.g. `Vec<String, _>::new()`. Previously, the returned type for `Self`-returning methods would return the unresolved, generic type as encountered in the impl header (so `Vec<T, A: AllocRef = Global>` in this case). However, if the method match already carries some information about generics (T := String here), make sure to account for it.
Xanewok
commented
Dec 1, 2020
src/racer/ast.rs
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| if let (Some(Ty::Match(ref mut m)), Some(gen)) = (&mut return_ty, gen) { | ||
| let resolved = gen.args().filter_map(|tp| tp.resolved()); | ||
| for (l, r) in m.generics_mut().zip(resolved) { | ||
| l.resolve(r.clone()); |
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This looks like a hack but I encountered a similar resolve/substitution code in other places, so it seems it's not as out of place as it looks at a first glance.
There may be other designs how to tackle this but decided for it because it's least invasive for now.
Otherwise we may have an order mismatch Co-authored-by: Yuji Kanagawa <yuji.kngw.80s.revive@gmail.com>
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Squashed the last few fixup commits and force-pushed |
Merged
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Going to merge the final version since it's approved. Thanks for taking a look! |
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Thanks! |
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See #1143 for more context.