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# Objective - Fix a link to a non-existent section of a document. ## Solution - Change the link to a more likely source.
38 lines
2.1 KiB
Markdown
38 lines
2.1 KiB
Markdown
# Style guide: Engine
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## Contributing
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For more advice on contributing to the engine, see the [relevant section](../../CONTRIBUTING.md#Contributing-code) of `CONTRIBUTING.md`.
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## General guidelines
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1. Prefer granular imports over glob imports like `bevy_ecs::prelude::*`.
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2. Use a consistent comment style:
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1. `///` doc comments belong above `#[derive(Trait)]` invocations.
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2. `//` comments should generally go above the line in question, rather than in-line.
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3. Avoid `/* */` block comments, even when writing long comments.
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4. Use \`variable_name\` code blocks in comments to signify that you're referring to specific types and variables.
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5. Start comments with capital letters. End them with a period if they are sentence-like.
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3. Use comments to organize long and complex stretches of code that can't sensibly be refactored into separate functions.
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## Rust API guidelines
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As a reference for our API development we are using the [Rust API guidelines][Rust API guidelines]. Generally, these should be followed, except for the following areas of disagreement:
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### Areas of disagreements
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Some areas mentioned in the [Rust API guidelines][Rust API guidelines] we do not agree with. These areas will be expanded whenever we find something else we do not agree with, so be sure to check these from time to time.
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> All items have a rustdoc example
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- This guideline is too strong and not applicable for everything inside of the Bevy game engine. For functionality that requires more context or needs a more interactive demonstration (such as rendering or input features), make use of the `examples` folder instead.
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> Examples use ?, not try!, not unwrap
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- This guideline is usually reasonable, but not always required.
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> Only smart pointers implement Deref and DerefMut
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- Generally a good rule of thumb, but we're probably going to deliberately violate this for single-element wrapper types like `Life(u32)`. The behavior is still predictable and it significantly improves ergonomics / new user comprehension.
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[Rust API guidelines]: https://rust-lang.github.io/api-guidelines/about.html
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