gcc/testsuite/gfortran.dg/forall_5.f90

   1 ! { dg-do compile }
   2 ! Tests the fix for PR25072, in which non-PURE functions could
   3 ! be referenced inside a FORALL mask.
   4 !
   5 ! Contributed by Paul Thomas  <pault@gcc.gnu.org>
   6 !
   7 module foo
   8   integer, parameter :: n = 4
   9 contains
  10   logical function foot (i)
  11     integer, intent(in) :: i
  12     foot = (i == 2) .or. (i == 3)
  13   end function foot
  14 end module foo
  15
  16   use foo
  17   integer :: i, a(n)
  18   logical :: s(n)
  19
  20   a = 0
  21   forall (i=1:n, foot (i)) a(i) = i  ! { dg-error "impure" }
  22   if (any (a .ne. (/0,2,3,0/))) STOP 1
  23
  24   forall (i=1:n, s (i) .or. t(i)) a(i) = i  ! { dg-error "impure|LOGICAL" }
  25   if (any (a .ne. (/0,3,2,1/))) STOP 2
  26
  27   a = 0
  28   forall (i=1:n, mod (i, 2) == 0) a(i) = w (i)  ! { dg-error "impure" }
  29   if (any (a .ne. (/0,2,0,4/))) STOP 3
  30
  31 contains
  32   logical function t(i)
  33     integer, intent(in) :: i
  34     t = (mod (i, 2) == 0)
  35   end function t
  36   integer function w(i)
  37     integer, intent(in) :: i
  38     w = 5 - i
  39   end function w
  40 end