rust-lang / rust-lang/rfcs

Allow `if <cond> { ... } else match { ... }`

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#3,024 7 comments 5 reactions 0 assignees View on GitHub

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Description

We allow else if so it's a pretty natural extension to support else match too. In fact I've often forgotten that this is not supported...

Example:

fn main() {
    let x = 1;
    let y = 2;
    if x == 2 {
        // Do something
    } else match y {
        1 => {},
        _ => {}
    }
}

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the Rust RFC process and the syntax example in this issue; the payload names no source files or tests. Define the intended grammar and interactions with existing else-if and match behavior, then document the proposal and validate it through the project's RFC process.

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
Mostly clear
Newbie friendliness
30/100

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