rust-lang/rust-clippy

Lint for Debug formatting in Display implementations

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#1713 opened on May 2, 2017

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 (3 comments) (0 reactions) (0 assignees)Rust (10,406 stars) (1,391 forks)batch import
C-enhancementL-styleT-middlegood first issue

Description

This is similar to use_debug but should be a warn by default.

Contributor guide

Tech stack
rust
Domain
toolingdeveloper experience
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Rust programmingClippy lint development basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Examine the existing `use debug` lint implementation in the Clippy source code (likely in `clippy lints/src/`). Understand how it detects `Debug` formatting in `Display` implementations. Then write a new lint that warns when `Debug` is used inside `Display` implementations, with a default warn level. Follow the pattern of `use debug` and add tests.