gcc/testsuite/gfortran.dg/interface_7.f90

   1 ! { dg-do compile }
   2 ! One of the tests of the patch for PR30068.
   3 !  Taken from the fortran 2003 standard C11.2.
   4 !
   5 ! The interface is invalid although it is unambiguous because the
   6 ! standard explicitly does not require recursion into the formal
   7 ! arguments of procedures that themselves are interface arguments.
   8 !
   9 module xx
  10   INTERFACE BAD9
  11     SUBROUTINE S9A(X)
  12       REAL :: X
  13     END SUBROUTINE S9A
  14     SUBROUTINE S9B(X)
  15       INTERFACE
  16         FUNCTION X(A)
  17           REAL :: X,A
  18         END FUNCTION X
  19       END INTERFACE
  20     END SUBROUTINE S9B
  21     SUBROUTINE S9C(X)
  22       INTERFACE
  23         FUNCTION X(A)
  24           REAL :: X
  25           INTEGER :: A
  26         END FUNCTION X
  27       END INTERFACE
  28     END SUBROUTINE S9C  ! { dg-error "Ambiguous interfaces" }
  29   END INTERFACE BAD9
  30 end module xx