rust-lang/rust-by-example

Add examples of Default and when to/not use it

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#1256 opened on Sep 14, 2019

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enhancementgood first issue

Description

Default is mentioned occasionally in the book, but I think it could use its own page.

Contributor guide

Tech stack
rust
Domain
documentation
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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 basicsUnderstanding of Default trait
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80
Research direction
Add a new page to the Rust by Example book covering the Default trait, including examples of its usage, the `#[derive(Default)]` macro, and discussion of when it is appropriate to use Default versus implementing it manually. Refer to existing pages like those for `From` and `Into` for style and structure. Check the single comment on the issue for any additional context or suggestions.