rust-lang / rust-lang/reference
Propagate temporary lifetime extension into if and match expressions
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A-destructors
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- Dominant language
- Rust
- Stars
- 1.6k
- Forks
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Description
Since 1.79, the temporaries are extended in the following example:
let a = if true {
..;
&temp() // used to error, but now gets lifetime extended
} else {
..;
&temp() // used to error, but now gets lifetime extended
};
The list in extending-based-on-expressions seems to be out-of-date.
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.
Research direction
Start with the Reference's extending-based-on-expressions section and compare its list with the temporary lifetime behavior shown in the issue's Rust example. Verify the if and match cases against the current language behavior, then update the section so it documents the supported expressions accurately.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100