topic Re: Interfaces in Intel® Fortran Compiler

Interfaces

JohnNichols — Tue, 21 Jul 2020 22:12:27 GMT

I am using a lot more modules for data, and the subroutines, is it a good idea to always use interfaces?

Just checking.

Re: Interfaces

FortranFan — Tue, 21 Jul 2020 23:40:08 GMT

Re "is it a good idea to always use interfaces?" - yes, absolutely.

Re: Interfaces

mecej4 — Wed, 22 Jul 2020 01:57:04 GMT

When subroutines and functions in a module are accessed by USE <module_name> in a "consumer" of that module, an interface is already available, so there is no need to provide an interface block. Similarly, any procedure that is in a module has interfaces for other procedures in that module without your having to write interface blocks.

Re: Interfaces

Steve_Lionel — Wed, 22 Jul 2020 19:02:57 GMT

My position is that, with a couple of exceptions, if you're writing an interface block for a Fortran procedure in your own application, you're doing it wrong. Exceptions are declarations of generic procedures and when using submodules. Otherwise, your procedures should be in modules (or contained), in which case, as @mecej4 says, you get the explicit interface automatically.

I have written about interfaces twice: Doctor Fortran Gets Explicit! and Doctor Fortran Gets Explicit – Again!

Re: Interfaces

JohnNichols — Wed, 22 Jul 2020 21:19:41 GMT

Thanks for being explicit.

Re: Interfaces

JohnNichols — Wed, 22 Jul 2020 21:43:20 GMT

Some unspecified AT&T weenie

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Found in a file from an internet source, quite disturbing in a way