gcc/testsuite/gfortran.dg/interface_3.f90

   1 ! { dg-do compile }
   2 ! Tests the fix for PR20880, which was due to failure to the failure
   3 ! to detect the USE association of a nameless interface for a
   4 ! procedure with the same name as the encompassing scope.
   5 !
   6 ! Contributed by Joost VandeVondele  <jv244@cam.ac.uk>
   7 !
   8 module test_mod
   9 interface
  10   subroutine my_sub (a)
  11     real a
  12   end subroutine
  13 end interface
  14 interface
  15   function my_fun (a)
  16     real a, my_fun
  17   end function
  18 end interface
  19 end module
  20
  21 module test_mod2
  22 interface
  23   function my_fun (a)
  24     real a, my_fun
  25   end function
  26 end interface
  27 end module
  28
  29
  30 ! This is the original PR, excepting that the error requires the symbol
  31 ! to be referenced.
  32 subroutine my_sub (a)
  33   use test_mod
  34   real a
  35   call my_sub (a)  ! { dg-error "ambiguous reference" }
  36   print *, a
  37 end subroutine
  38
  39 integer function my_fun (a)
  40   use test_mod
  41   real a
  42   print *, a
  43   my_fun = 1  ! { dg-error "ambiguous reference" }
  44 end function
  45
  46 ! This was found whilst investigating => segfault
  47 subroutine thy_sub (a)
  48   interface
  49     subroutine thy_sub (a) ! { dg-error "enclosing procedure" }
  50       real a
  51     end subroutine
  52   end interface
  53   real a
  54   print *, a
  55 end subroutine
  56
  57 subroutine thy_fun (a)
  58   use test_mod
  59   use test_mod2  ! OK because there is no reference to my_fun
  60   print *, a
  61 end subroutine thy_fun
  62
  63 subroutine his_fun (a)
  64   use test_mod
  65   use test_mod2
  66   print *, my_fun (a)  ! { dg-error "ambiguous reference" }
  67 end subroutine his_fun
  68
  69 ! { dg-final { cleanup-modules "test_mod test_mod2" } }