linebender / linebender/xilem

Add #[derive(View)] for enums and nested structs

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Dominant language
Rust
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Merged PRs (30d)
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Description

I think a derive macro for the view trait, especially on enums, would really benefit ergonomics.
Views that return multiple types on a condition, such as an if block or match statement, could instead return an enum with View derived.

For example, for conditional views we could return a custom enum like:

#[derive(View)]
enum UserForm {
  Login(LoginView),
  SignUp(SignUpView)
}

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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 existing View trait and any current derive-macro support. Define how derived View implementations should handle enums and nested structs, and consider the conditional-view examples in the issue; done means the design and supported cases are agreed and implemented with coverage for those cases.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
frontend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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