rust-lang / rust-lang/rust-analyzer
feature request: inlay hints for default trait object lifetimes
Nobody has claimed this yet.
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- Rust
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Description
I recently found out about this (very cool!) feature of r-a to show elided lifetimes of functions as inlay hints and thought it would be even cooler it could also show the default trait object lifetimes, because they can often be confusing.
For example this input
trait Trait {}
fn foo(_: &dyn Trait, _: Box<dyn Trait>) {}
could be displayed as
trait Trait {}
fn foo<'0>(_: &'0 (dyn Trait + '0), _: Box<dyn Trait + 'static>) {}
to explicitly show the inferred lifetime of trait objects.
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
No file, test, or entry point is named. Start by locating the existing inlay-hint implementation for elided function lifetimes, then trace how it represents inferred lifetimes; done means default trait-object lifetimes are shown as in the issue's reference-bound and 'static examples.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- developer-experience, tooling
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100