Document `$crate` in macro matcher
Nobody has claimed this yet.
Assessment
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Newbie friendliness
- 45/100
- Issue type
- Documentation
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- rust
- Domain
- documentation
Research direction
Start by reproducing the provided macro_rules! example and reviewing the Rust Reference's macro matcher documentation. Document how $crate behaves in a matcher and clarify whether it can be written or matched outside a macro; the example should be explained with the documented behavior.
Written by the indexing model from the issue text.
Description
$crate in a macro matcher is the reserved identifier $crate that doesn't have a way to write it outside of a macro (I think?). That is:
macro_rules! m {
(x) => {
m!($crate:tt)
};
($crate:tt) => ()
}
fn main() {
m!(x); // OK
m!(y); // ERROR
m!($crate:tt); // ERROR
m!(crate:tt); // ERROR
}
- Dominant language
- Rust
- Stars
- 1.6k
- Forks
- 607
- Avg merge
- 1d 1h
- Merged PRs (30d)
- 12
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
More from rust-lang/reference
-
A-const-eval A-undefined-behavior
Difficulty 2/5 1-3 hours Newbie friendliness 68/100
-
Difficulty 2/5 1-3 hours Newbie friendliness 76/100
-
Difficulty 2/5 1-3 hours Newbie friendliness 72/100
-
A-resolve
Difficulty 2/5 1-3 hours Newbie friendliness 62/100
-
A-coercions
Difficulty 2/5 1-3 hours Newbie friendliness 65/100
All issues in rust-lang/reference
Similar issues
-
Difficulty 2/5 1-3 hours Newbie friendliness 86/100
kwakseongjae/auto-hwp#319 ·
-
area:cli bug filter-quality good first issue priority:medium
Difficulty 2/5 1-3 hours Newbie friendliness 84/100
-
Difficulty 1/5 Under an hour Newbie friendliness 72/100
bevyengine/bevy#25861 ·
-
comp-datalake
Difficulty 2/5 1-3 hours Newbie friendliness 88/100
ClickHouse/ClickHouse#121222 ·
-
enhancement remote
Difficulty 2/5 1-3 hours Newbie friendliness 68/100