gcc/testsuite/gfortran.dg/auto_char_len_4.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-fwhole-file" }
   3 !
   4 ! Tests the fix for PR25087, in which the following invalid code
   5 ! was not detected.
   6 !
   7 ! Contributed by Joost VandeVondele  <jv244@cam.ac.uk>
   8 !
   9 ! Modified by Tobias Burnus to fix PR fortran/41235.
  10 !
  11 FUNCTION a()
  12   CHARACTER(len=10) :: a
  13   a = ''
  14 END FUNCTION a
  15
  16 SUBROUTINE s(n)
  17   CHARACTER(LEN=n), EXTERNAL :: a ! { dg-error "must have an explicit interface" }
  18   CHARACTER(LEN=n), EXTERNAL :: d ! { dg-error "must have an explicit interface" }
  19   interface
  20     function b (m)                ! This is OK
  21       CHARACTER(LEN=m) :: b
  22       integer :: m
  23     end function b
  24   end interface
  25   write(6,*) a()
  26   write(6,*) b(n)
  27   write(6,*) c()
  28   write(6,*) d()
  29 contains
  30     function c ()                ! This is OK
  31       CHARACTER(LEN=n):: c
  32       c = ""
  33     end function c
  34 END SUBROUTINE s
  35
  36 FUNCTION d()
  37   CHARACTER(len=99) :: d
  38   d = ''
  39 END FUNCTION d