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# Contributing new code
- Please do the following *before* sending a pull request:
- Merge upstream code (if any) back into your own branch
- Run formatters/linters
# Git
- Push as often as possible
- Development is done on separate branches, these follow a pattern of
`name/feature` (i.e. `loek/dll-so-poc` or `jaro/class2`)
- The master branch is considered stable, and should always contain a
working/compiling version of the project
- TODO: tagging / versions
# Code style
- ASCII only
- Formatting nitty-gritty is handled by clang-format/clang-tidy (run `make
format` in the root folder of this repository to format all sources files)
- When using libraries of which the header include order is important, make
sure to separate the include statements using a blank line (clang-format may
sort include statements, but does not sort across empty lines).
- All engine-related code is implemented under the `crepe` namespace,
user-facing APIs under `crepe::api` (the folder structure should also reflect
this).
- `using namespace` may not be used in header files, only in source files.
- Do not (indirectly) include private dependency headers in API header files,
as these are no longer accessible when the engine is installed
- Getter and setter functions are appropriately prefixed with `get_` and
`set_`.
- Doxygen commands are used with a backslash instead of an at-sign (i.e.
`\brief` instead of `@brief`)
- A singleton's instance is always accessed using a getter function that
instantiates its own class as a static variable within the getter function
scope, instead of storing the instance as a member variable directly:
```cpp
class Bad {
static Bad instance;
Bad & get_instance() { return instance; }
};
class Good {
Good & get_instance() {
static Good instance;
return instance;
}
};
```
- Member variable default values should be directly defined in the class
declaration instead of using the constructor.
## CMakeLists specific
- Make sure list arguments (e.g. sources, libraries) given to commands (e.g.
`target_sources`, `target_link_libraries`) are on separate lines. This makes
resolving merge conflicts when multiple sources were added by different
people to the same CMakeLists.txt easier.
# Documentation
- All documentation is written in U.S. English
# Libraries
- External libraries should be included as Git submodules under the `lib/`
subdirectory
- When adding new submodules, please set the `shallow` option to `true` in the
[.gitmodules](./.gitmodules) file
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