41 lines
2.0 KiB
Markdown
41 lines
2.0 KiB
Markdown
# Coding convention
|
|
|
|
## Language
|
|
|
|
The language of this project is **C++**, and all new code must be written in C++. (Modern) C++ provides a lot of useful tools and functionalities that are beneficial for embedded software development like `constexpr`, `template` and anything that provides zero-cost abstraction.
|
|
|
|
C code is accepted if it comes from another library like FreeRTOS, NimBLE, LVGL or the NRF-SDK.
|
|
|
|
## Coding style
|
|
|
|
The most important rule to follow is to try to keep the code as easy to read and maintain as possible.
|
|
|
|
Using an autoformatter is highly recommended, but make sure it's configured properly.
|
|
|
|
There are preconfigured autoformatter rules for:
|
|
|
|
* CLion (IntelliJ) in [.idea/codeStyles/Project.xml](/.idea/codeStyles/Project.xml)
|
|
* `clang-format`
|
|
|
|
Also use `clang-tidy` to check the code for other issues.
|
|
|
|
If there are no preconfigured rules for your IDE, you can use one of the existing ones to configure your IDE.
|
|
|
|
- **Indentation** : 2 spaces, no tabulation
|
|
- **Opening brace** at the end of the line
|
|
- **Naming** : Choose self-describing variable name
|
|
- **class** : PascalCase
|
|
- **namespace** : PascalCase
|
|
- **variable** : camelCase, **no** prefix/suffix ('_', 'm_',...) for class members
|
|
- **Include guard** : `#pragma once` (no `#ifdef __MODULE__ / #define __MODULE__ / #endif`)
|
|
- **Includes** :
|
|
- files from the project : `#include "relative/path/to/the/file.h"`
|
|
- external files and std : `#include <file.h>`
|
|
- Only use [primary spellings for operators and tokens](https://en.cppreference.com/w/cpp/language/operator_alternative)
|
|
- Use auto sparingly. Don't use auto for [fundamental/built-in types](https://en.cppreference.com/w/cpp/language/types) and [fixed width integer types](https://en.cppreference.com/w/cpp/types/integer), except when initializing with a cast to avoid duplicating the type name.
|
|
- Examples:
|
|
- `auto* app = static_cast<DisplayApp*>(instance);`
|
|
- `auto number = static_cast<uint8_t>(variable);`
|
|
- `uint8_t returnValue = MyFunction();`
|
|
- Use nullptr instead of NULL
|