macros: clean up scopes of expanded #[macro_use] imports
#37084
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@EddyD, @brson, @nikomatsakis could this get a Crater run please? |
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Starting crater run now. |
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Thanks @eddyb! |
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@bors: r+ |
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📌 Commit 829bd8c has been approved by |
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ah crap @bors: r- |
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r=me if the Crater run comes back clean |
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The crater report only has crater download failures and such (cc @brson). @bors r=nrc |
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📌 Commit 829bd8c has been approved by |
alexcrichton
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…e_scopes, r=nrc
macros: clean up scopes of expanded `#[macro_use]` imports
This PR changes the scope of macro-expanded `#[macro_use]` imports to match that of unexpanded `#[macro_use]` imports. For example, this would be allowed:
```rust
example!();
macro_rules! m { () => { #[macro_use(example)] extern crate example_crate; } }
m!();
```
This PR also enforces the full shadowing restrictions from RFC 1560 on `#[macro_use]` imports (currently, we only enforce the weakened restrictions from rust-lang#36767).
This is a [breaking-change], but I believe it is highly unlikely to cause breakage in practice.
r? @nrc
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bors
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macros: improve shadowing checks This PR improves macro-expanded shadowing checks to work with out-of-(pre)order expansion. Out-of-order expansion became possible in #37084, so this technically a [breaking-change] for nightly. The regression test from this PR is an example of code that would break. r? @nrc
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This PR changes the scope of macro-expanded
#[macro_use]imports to match that of unexpanded#[macro_use]imports. For example, this would be allowed:This PR also enforces the full shadowing restrictions from RFC 1560 on
#[macro_use]imports (currently, we only enforce the weakened restrictions from #36767).This is a [breaking-change], but I believe it is highly unlikely to cause breakage in practice.
r? @nrc