gcc/testsuite/gfortran.dg/null_actual_4.f90

   1 ! { dg-do compile }
   2 ! PR fortran/104819
   3 !
   4 ! Reject NULL without MOLD as actual to an assumed-rank dummy.
   5 ! See also interpretation request at
   6 ! https://j3-fortran.org/doc/year/22/22-101r1.txt
   7 !
   8 ! Test nested NULL()
   9
  10 program p
  11   implicit none
  12   integer, pointer :: a, a3(:,:,:)
  13   character(10), pointer :: c
  14
  15   call foo (a)
  16   call foo (a3)
  17   call foo (null (a))
  18   call foo (null (a3))
  19   call foo (null (null (a)))  ! Valid: nested NULL()s
  20   call foo (null (null (a3))) ! Valid: nested NULL()s
  21   call foo (null ())          ! { dg-error "passed to assumed-rank dummy" }
  22
  23   call str (null (c))
  24   call str (null (null (c)))
  25   call str (null ())          ! { dg-error "passed to assumed-length dummy" }
  26 contains
  27   subroutine foo (x)
  28     integer, pointer, intent(in) :: x(..)
  29     print *, rank (x)
  30   end
  31
  32   subroutine str (x)
  33     character(len=*), pointer, intent(in) :: x
  34   end
  35 end