!
!   Example of getting an enum value from the options database in Fortran
#include "petsc/finclude/petsc.h"
      use petsc
      implicit none

      PetscErrorCode                            :: ierr
      character(len=99) list1(6)
      PetscEnum                                 :: opt = -1
      PetscBool                                 :: set = PETSC_FALSE

      PetscCallA(PetscInitialize(ierr))
      list1(1) = 'a123'
      list1(2) = 'b456'
      list1(3) = 'c789'
      list1(4) = 'list1'
      list1(5) = 'prefix_'
      list1(6) = ''

      write (*, 20) list1(1)
20    format(A99)
      PetscCallA(PetscOptionsGetEnum(PETSC_NULL_OPTIONS, 'joe_', '-jeff', list1, opt, set, ierr))
      write (*, *) 'opt is ', opt
      write (*, *) 'set is ', set

      PetscCallA(PetscFinalize(ierr))
    end

!
!/*TEST
!
!   test:
!      args: -joe_jeff b456
!
!TEST*/