[petsc-dev] CHKERRQ vs PetscCall for Fortran? Which is the future?

Boyce Griffith boyceg at gmail.com
Tue Apr 26 20:18:55 CDT 2022

> On Apr 26, 2022, at 8:12 PM, Barry Smith <bsmith at petsc.dev> wrote:
> I didn't like PetscCall(ierr) in Fortran because it is strange, even freakish. PetscCall(AFunction(args)) makes sense in C but IMHO "call AFunction(args,ierr); PetscCall(ierr)" looks weird, what are you calling? Nothing. I'd like to keep CHKERRQ(ierr) in Fortran and not support PetscCall(ierr) in Fortran. 

I have to admit that I don’t really understand the C usage either, since unless I am misreading the code, PetscCall in C doesn’t actually “call” the function that is in its arguments, but rather “checks” the called function’s return value.

— Boyce
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