In what order should headers be included?
c++, code-organization, header-files, include
Solution
In a header file you have to include ALL the headers to make it compilable. And don't forget to use forward declarations instead of some headers.
In a source file:
- corresponded header file
- necessary project headers
- 3rd party libraries headers
- standard libraries headers
- system headers
In that order you will not miss any of your header files that forgot to include libraries by their own.
Problem
What order should headers be declared in a header / cpp file? Obviously those that are required by subsequent headers should be earlier and class specific headers should be in cpp scope not header scope, but is there a set order convention / best practice?