- NOTE: Description of how the code works (when it isn't self evident)
- XXX: Warning about possible pitfalls, can be used as NOTE:XXX:
- HACK: Not very well written or malformed code to circumvent a problem/bug. Should be used as HACK:FIXME:
- FIXME: This works, sort of, but it could be done better. (usually code written in a hurry that needs rewriting)
- BUG: There is a problem here.
- TODO: No problem, but addtional code needs to be written (usually when you are skipping something)
TODO: + 说明：
如果代码中有该标识，说明在标识处有功能代码待编写，待实现的功能在说明中会简略说明。
FIXME: + 说明：
如果代码中有该标识，说明标识处代码需要修正，甚至代码是错误的，不能工作，需要修复，如何修正会在说明中简略说明。
XXX: + 说明：
如果代码中有该标识，说明标识处代码虽然实现了功能，但是实现的方法有待商榷，希望将来能改进，要改进的地方会在说明中简略说明。