Arrays - Fortran Programming Language Fortran Programming Language According to the Fortran best practice docs, the preferred way to pass arrays to procedures is as assumed-shape arrays. I prefer to pass explicit-shape arrays to procedures. Just want to ask …

I think the main gotcha is that explicit shape dummy arrays must be contiguous. That means if the actual argument is not contiguous, then copy-in/copy-out is invoked by the compiler, using a temporary intermediate array. If that occurs in a tight loop that is executed many times, then the performanc…

The biggest reason I avoid using explicit shape procedure arguments is that nothing actually checks that the dummy and actual arguments are actually the same shape. Off-by-one errors, mismatched arguments (especially in the case of 2-d arrays), etc. go uncaught by the compiler and (if you’re lucky) …

Is passing explicit-shape arrays to procedures discouraged?

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FortranFan June 7, 2022, 3:21am 3

@fortran4r , you may want to review this thread again closely, you will notice a longish discussion there on dummy arguments that are explicit-shape arrays.

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Is passing explicit-shape arrays to procedures discouraged?

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