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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gfortran.dg/proc_ptr_comp_6.f90
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+! { dg-do run }
+!
+! PR39630: Fortran 2003: Procedure pointer components.
+!
+! test case taken from:
+! http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/4a827e8ced6efb0f/884b9eca6d7e6742?#884b9eca6d7e6742
+! http://fortranwiki.org/fortran/show/proc_component_example
+
+module proc_component_example
+
+ type t
+ real :: a
+ procedure(print_int), pointer, &
+ nopass :: proc
+ end type t
+
+ abstract interface
+ subroutine print_int (arg, lun)
+ import
+ type(t), intent(in) :: arg
+ integer, intent(in) :: lun
+ end subroutine print_int
+ end interface
+
+ integer :: calls = 0
+
+contains
+
+ subroutine print_me (arg, lun)
+ type(t), intent(in) :: arg
+ integer, intent(in) :: lun
+ write (lun,*) arg%a
+ calls = calls + 1
+ end subroutine print_me
+
+ subroutine print_my_square (arg, lun)
+ type(t), intent(in) :: arg
+ integer, intent(in) :: lun
+ write (lun,*) arg%a**2
+ calls = calls + 1
+ end subroutine print_my_square
+
+end module proc_component_example
+
+program main
+
+ use proc_component_example
+ use iso_fortran_env, only : output_unit
+
+ type(t) :: x
+
+ x%a = 2.71828
+
+ x%proc => print_me
+ call x%proc(x, output_unit)
+ x%proc => print_my_square
+ call x%proc(x, output_unit)
+
+ if (calls/=2) call abort
+
+end program main
+
+! { dg-final { cleanup-modules "proc_component_example" } }
+