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Rollup merge of #90202 - matthewjasper:xcrate-hygiene, r=petrochenkov

Improve and test cross-crate hygiene

- Decode the parent expansion for traits and enums in `rustc_resolve`, this was already being used for resolution in typeck
- Avoid suggesting importing names with def-site hygiene, since it's often not useful
- Add more tests

r? `@petrochenkov`
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Guillaume Gomez 2021-10-30 20:30:27 +02:00 committed by GitHub
commit 1a1f525bb0
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27 changed files with 525 additions and 32 deletions

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@ -709,7 +709,7 @@ impl SyntaxContext {
/// pub fn f() {} // `f`'s `SyntaxContext` has a single `ExpnId` from `m`.
/// pub fn $i() {} // `$i`'s `SyntaxContext` is empty.
/// }
/// n(f);
/// n!(f);
/// macro n($j:ident) {
/// use foo::*;
/// f(); // `f`'s `SyntaxContext` has a mark from `m` and a mark from `n`