resolve: Do not put macros into module.unexpanded_invocations unless necessary
#79294
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
r? @varkor (rust_highfive has picked a reviewer for you, use r? to override) |
rust-highfive
added
the
S-waiting-on-review
|
@bors r+ |
|
📌 Commit 27af650 has been approved by |
bors
added
S-waiting-on-bors
m-ou-se
added a commit
to m-ou-se/rust
that referenced
this pull request
Nov 22, 2020
resolve: Do not put macros into `module.unexpanded_invocations` unless necessary
Macro invocations in modules <sup>(*)</sup> need to be tracked because they can produce named items when expanded.
We cannot give definite answer to queries like "does this module declare name `n`?" until all macro calls in that module are expanded.
Previously we marked too many macros as potentially producing named items.
E.g. in this example
```rust
mod m {
const C: u32 = line!();
}
```
`line!()` cannot emit any items into module `m`, but it was still marked.
This PR fixes that and marks macro calls as "unexpanded in module" only if they can actually emit named items into that module.
Diagnostics in UI test outputs have different order now because this change affects macro expansion order.
<sup>*</sup> Any containers for named items are called modules in resolve (that includes blocks, traits and enums in addition to `mod` items).
Dylan-DPC-zz
pushed a commit
to Dylan-DPC-zz/rust
that referenced
this pull request
Nov 24, 2020
resolve: Do not put macros into `module.unexpanded_invocations` unless necessary
Macro invocations in modules <sup>(*)</sup> need to be tracked because they can produce named items when expanded.
We cannot give definite answer to queries like "does this module declare name `n`?" until all macro calls in that module are expanded.
Previously we marked too many macros as potentially producing named items.
E.g. in this example
```rust
mod m {
const C: u32 = line!();
}
```
`line!()` cannot emit any items into module `m`, but it was still marked.
This PR fixes that and marks macro calls as "unexpanded in module" only if they can actually emit named items into that module.
Diagnostics in UI test outputs have different order now because this change affects macro expansion order.
<sup>*</sup> Any containers for named items are called modules in resolve (that includes blocks, traits and enums in addition to `mod` items).
|
☀️ Test successful - checks-actions |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Macro invocations in modules (*) need to be tracked because they can produce named items when expanded.
We cannot give definite answer to queries like "does this module declare name
n?" until all macro calls in that module are expanded.Previously we marked too many macros as potentially producing named items.
E.g. in this example
line!()cannot emit any items into modulem, but it was still marked.This PR fixes that and marks macro calls as "unexpanded in module" only if they can actually emit named items into that module.
Diagnostics in UI test outputs have different order now because this change affects macro expansion order.
* Any containers for named items are called modules in resolve (that includes blocks, traits and enums in addition to
moditems).