For many index cases such a function call it is needed to check if
any of the included files are changed because the function which is called
could be changed too.
Change-Id: Ibe0f43426c735d39072f284cad075dd4dc6f99c0
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
Indexing source files multiple times is unneeded overhead in many cases.
The source manager is a support class to handle that cases.
Change-Id: Id737eaa9a691c54563279562833493a221eb3431
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>