gcc/testsuite/gfortran.dg/nested_modules_1.f90

   1 ! { dg-do run }
   2 !
   3 ! This tests that common blocks function with multiply nested modules.
   4 ! Contributed by Paul Thomas  <pault@gcc.gnu.org>
   5 !
   6        module mod0
   7          complex(kind=8) FOO, KANGA
   8          common /bar/ FOO, KANGA
   9        contains
  10          subroutine eyeore ()
  11            FOO = FOO + (1.0d0, 0.0d0)
  12            KANGA = KANGA - (1.0d0, 0.0d0)
  13          end subroutine eyeore
  14        end module mod0
  15        module mod1
  16          use mod0
  17          complex ROBIN
  18          common/owl/ROBIN
  19        end module mod1
  20        module mod2
  21          use mod0
  22          use mod1
  23          real(kind=8) re1, im1, re2, im2, re, im
  24          common /bar/ re1, im1, re2, im2
  25          equivalence (re1, re), (im1, im)
  26        contains
  27          subroutine tigger (w)
  28            complex(kind=8) w
  29            if (FOO.ne.(1.0d0, 1.0d0)) call abort ()
  30            if (KANGA.ne.(-1.0d0, -1.0d0)) call abort ()
  31            if (ROBIN.ne.(99.0d0, 99.0d0)) CALL abort ()
  32            if (w.ne.cmplx(re,im)) call abort ()
  33          end subroutine tigger
  34        end module mod2
  35
  36        use mod2
  37        use mod0, only: w=>foo
  38        w = (0.0d0, 1.0d0)  ! Was foo but this is forbidden (11.3.2)
  39        KANGA = (0.0d0, -1.0d0)
  40        ROBIN = (99.0d0, 99.0d0)
  41        call eyeore ()
  42        call tigger (w)
  43        end