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JohnNichols
Valued Contributor I
176 Views

Interfaces

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

Just checking.

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5 Replies
FortranFan
Honored Contributor I
161 Views

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

mecej4
Black Belt
152 Views

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.

Steve_Lionel
Black Belt Retired Employee
122 Views

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!

JohnNichols
Valued Contributor I
114 Views

Thanks for being explicit. 

JohnNichols
Valued Contributor I
108 Views

Some unspecified AT&T weenie

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

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