Better support of include statements

[wardev]

Thanks for the great plugin! The go to definition (ctrl-click) is a great feature. It would be nice if it understood that some variables are defined in include files. E.g.

sub.f90

subroutine sub
  include 'const.inc'
  write(*,*) pi
end subroutine

const.inc

real, parameter :: pi = 3.14

Ctrl-click on pi in sub.f90 and it says that there are no usages/definition in the project. I would expect it to open const.inc and jump to the line where pi is declared.

I know new code should use modules and the use statement instead of include files, but older code uses include files because modules were not invented yet.

[satamas]

Hi. I'm glad that you love the plugin. I suppose that problem is in *.inc extension. Currently, we don't recognize such files as Fortran files so we don't perform any analysis in them. If all your *.inc files are Fortran files, you can solve the issue by using file types feature.

[wardev]

Thanks for the quick reply. I forgot to mention that I used File > Settings > File Types to configure *.inc as fixed format Fortran files.

[satamas]

Ok, at first I didn't read the issue carefully, plugin has no support for include statements, that's true.

A couple of questions:

1. Do you use CMake to build your project?
2. Where included files are located in your case?

Why I'm asking: I'm trying to figure out how to resolve included file. If we are talking about old projects, than there is most probably no CMake there. This means that I have no project model and I can't resolve file precisely. According to https://docs.oracle.com/cd/E19957-01/805-4939/6j4m0vna1/index.html there are four places where include files can be located. I can look only in first and last ones. In CMake based projects it should be possible to resolve file precisely, but I'm not sure that it would be easy.

So I need a real use-case to implement patial support of include statements that will cover it.

[wardev]

Do you use CMake to build your project?

yes

Where included files are located in your case?

in the same directory as the main Fortran source files. Test files (in a separate directory) include the .inc files from the main directory.

Thanks for taking the time to look in to this. If it is easier I think just searching through directories that are marked as source directories in IDEA would be sufficient. That is how I currently grep through the include files. Theoretically it is possible to have multiple include files with the same name in different directories, but that would be horrendously confusing so I don't see a need to support it.

[satamas]

I've added support in parser for including absolute and relative files. Includes that require CMake will be difficult to support just as I expected. For now it doesn't really helps with "Find usages" or navigation, but I want to try it in this way, because I've already made a lot of changes in parser and I'm afraid that something will break. I will also add file navigation in include statements before release and maybe completion and move refactoring support