rust-lang / rust-lang/rust-analyzer
Implement `super let`
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Description
https://blog.m-ou.se/super-let/
We have implemented rustc's new format_args! expansion but since we are lacking of super let, it makes some borrowck failures like in here
Edit: I initially thought this was causing MIR evaluation errors, but that turned out not to be the case—those were resolved by #20073.
While I believe we'll eventually need this change, it's not urgent at the moment due to other quirks in MIR or borrowck and more pressing issues elsewhere.
So I'm releasing my assignment on this for now.
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 by reading the linked blog post on super let and the rust-analyzer PR discussion referenced in the issue. Review the existing format_args! expansion work and issue #20073 for context, then define the affected behavior and tests before attempting the implementation.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100