Add Syntax For Additional Files to Parse

[WesKw]

Add syntax rules to be able to parse nested files. What should this syntax look like? Simple include statements? Maybe !!milhoja include 'interface_file.F90'?

[kweide]

• Should such an "include" or "reference" in Unit_interface.F90 have an effect / be visible in the whole of Unit_interface.F90, or should it be specific to only one subroutine interface in Unit_interface.F90?
• Should this new feature "include" or "reference" a whole OtherUnit_interface.F90 file, or just a specific subroutine interface within the OtherUnit_interface.F90 file?

[WesKw]

I believe an "include" should be visible in the entire Unit_interface.F90, I don't see much of a reason to have it be local to a function. Maybe "include" is not the right name, perhaps "dependency"?

You second point is a good question. To me it makes sense to include the entire OtherUnit_interface.F90 file in the case that there are common block annotations specific to that file.