[Bug fortran/54322] New: [OOP] Wrong TARGET-attribute handling with CLASS IS/TYPE IS
burnus at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Sun Aug 19 15:34:00 GMT 2012
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54322
Bug #: 54322
Summary: [OOP] Wrong TARGET-attribute handling with CLASS
IS/TYPE IS
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Keywords: accepts-invalid, diagnostic
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: burnus@gcc.gnu.org
CC: janus@gcc.gnu.org
Reported at comp.lang.fortran,
https://groups.google.com/forum/?fromgroups#!topic/comp.lang.fortran/11t7gAgUGD4
The following piece of the program is invalid if PC_ALLOC is not a TARGET,
however, gfortran accepts it:
select type ( AN => pc_alloc )
type is ( POINT_3D )
p3d_poi=>AN
Note that this possibly not only affects pointer assignment but also passing as
actual argument to an INTENT(IN) pointer dummy, and possibly other cases.
!------------- LONG TEST CASE ---------------
module mymod
type POINT
real :: X, Y
contains
procedure :: s1 => sub1
end type POINT
type, extends(POINT) :: POINT_3D
real :: Z
end type POINT_3D
type, extends(POINT) :: COLOR_POINT
integer :: COLOR
end type COLOR_POINT
contains
subroutine sub1(this)
class(POINT) :: this
end subroutine sub1
end module mymod
!================================================
program hello
use mymod
implicit none
type(POINT), target :: P
type(POINT_3D), target :: P3D
type(COLOR_POINT), target :: CP
class(POINT), pointer :: P_OR_CP
class(POINT),allocatable::pc_alloc !NO "TARGET"
class(POINT_3D),pointer ::p3d_poi
P_OR_CP=> CP
allocate (POINT_3D :: pc_alloc)
pc_alloc%X=1.
pc_alloc%Y=2.
select type ( AN => pc_alloc )
class is ( POINT )
! print *, AN%X, AN%Y
type is ( POINT_3D )
AN%Z=3.
p3d_poi=>AN ! INVALID if PC_ALLOC is not a TARGET
end select
print *, p3d_poi%X, p3d_poi%Y, p3d_poi%Z
end program
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