! Example for PetscOptionsInsertFileYAML: Fortran Example

program main

#include <petsc/finclude/petscsys.h>
      use petscsys

      implicit none
      PetscErrorCode                    :: ierr
      character(len=PETSC_MAX_PATH_LEN) :: filename
      PetscBool                         ::  flg

      PetscCallA(PetscInitialize(ierr))
      PetscCallA(PetscOptionsGetString(PETSC_NULL_OPTIONS,PETSC_NULL_CHARACTER,'-f',filename,flg,ierr))
      if (flg) then
        PetscCallA(PetscOptionsInsertFileYAML(PETSC_COMM_WORLD,PETSC_NULL_OPTIONS,filename,PETSC_TRUE,ierr))
      end if

      PetscCallA(PetscOptionsView(PETSC_NULL_OPTIONS,PETSC_VIEWER_STDOUT_WORLD,ierr))
      PetscCallA(PetscFinalize(ierr))

!/*TEST
!
! testset:
!   filter: grep -E -v "(options_left)"
!
!   test:
!      suffix: 1
!      args: -f petsc.yml -options_left 0
!      localrunfiles: petsc.yml
!      output_file: output/ex47_1.out
!
!   test:
!      suffix: 2
!      args: -options_file_yaml petsc.yml -options_left 0
!      localrunfiles: petsc.yml
!      output_file: output/ex47_2.out
!
!TEST*/
end program main