ESMF_VMIdCompare Function

  function ESMF_VMIdCompare(vmId1, vmId2, rc)
!
! !RETURN VALUE:
    logical :: ESMF_VMIdCompare
!
! !ARGUMENTS:
    type(ESMF_VMId),   intent(in)            :: vmId1
    type(ESMF_VMId),   intent(in)            :: vmId2
    integer,           intent(out), optional :: rc
!
! !DESCRIPTION:
!   Compare two ESMF_VMId objects.
!
!   The arguments are:
!   \begin{description}
!   \item[vmId1]
!        ESMF_VMId object 1
!   \item[vmId2]
!        ESMF_VMId object 2
!   \item[{[rc]}] 
!        Return code; equals {\tt ESMF\_SUCCESS} if there are no errors.
!   \end{description}
!
!EOPI
!------------------------------------------------------------------------------
    integer                 :: localrc      ! local return code
    type(ESMF_Logical)      :: tf

    ! initialize return code; assume routine not implemented
    localrc = ESMF_RC_NOT_IMPL
    if (present(rc)) rc = ESMF_RC_NOT_IMPL

    ! Call into the C++ interface
    call c_ESMC_VMIdCompare(vmId1, vmId2, tf, localrc)
    ESMF_VMIdCompare = tf == ESMF_TRUE
    if (ESMF_LogFoundError(localrc, ESMF_ERR_PASSTHRU, &
      ESMF_CONTEXT, rcToReturn=rc)) return

    ! return successfully
    if (present(rc)) rc = ESMF_SUCCESS

  end function ESMF_VMIdCompare