Shorthand for fns that immediately match
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Description
There is a desire to have some sort of shorthand for functions that immediately match on their argument. Currently, one must write:
fn foo(x: Type) { match x { ... } }
or
|x| match x { ... }
It would be nice to be able to elide the match (and perhaps not even give a name to the parameter x). Many functional languages like Haskell and Scala have these sorts of shorthands.
Related RFCs:
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- Read the whole issue, then the project's contributing guide.
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Research direction
Start by reading this issue and the related RFC 1564, then review the Rust RFC process and the discussion here. The request describes a desired shorthand but does not settle its syntax or semantics; completion would require an agreed design and an accepted RFC.
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Assessment
- Tech stack
- rust
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100