[petsc-users] MatSetValues vs MatSetValuesBlocked

[Jed Brown]

Nidish <nb25 at rice.edu> writes:

> Ah I get it now, MatSetBlocked has to be set node-wise. I tried this and 
> it works, thank you.
>
> The other question I had was why are the arguments for MatSetValues() 
> and MatSetValuesBlocked() set to const PetscInt* and const PetscScalar*  
> instead of just PetscInt* and PetscScalar* ? I have the typecast there 
> so my flycheck doesn't keep throwing me warnings on emacs ;)

Your flycheck must be misconfigured.  I use flycheck with clangd, but it doesn't have a problem with that (this more specific type qualifier can always be added without a cast).

To pick a more mundane example, nobody casts the second argument.

void *memcpy(void *dest, const void *src, size_t n);