rust-lang / rust-lang/rust-analyzer

Option to disable red-underlining large blocks of code

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#7,067 5 comments 4 reactions 0 assignees View on GitHub

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A-diagnostics C-bug S-actionable
Dominant language
Rust
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Description

Rust analyzer tends to fill the whole function or file with red, like this:
image
This is annoying, I tend to disable the plugin for a moment when that happens.

It happens when I'm in the middle of writing a new function, or refactoring a function, and the error is "wrong return type". Sometimes I satisfy it by providing a return statement first, even mocked one, but it doesn't work if I want multiple branches with different returns.

Another use-case is when opening/closing brackets don't match, and red color makes it more difficult to find what's wrong.

Contributor guide

Open the contributing guide

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

No file or test is named. Start by reproducing the reported wrong-return-type and unmatched-bracket cases in the Rust analyzer plugin, then trace how diagnostics become red underlining. Done should provide a user-controlled way to reduce or disable large-block underlining while preserving useful diagnostics.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
developer-experience, tooling
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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