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! RUN: %S/test_errors.sh %s %t %f18
! Pointer assignment constraints 10.2.2.2 (see also assign02.f90)
module m
interface
subroutine s(i)
integer i
end
end interface
type :: t
procedure(s), pointer, nopass :: p
real, pointer :: q
end type
contains
! C1027
subroutine s1
type(t), allocatable :: a(:)
type(t), allocatable :: b[:]
a(1)%p => s
!ERROR: Procedure pointer may not be a coindexed object
b[1]%p => s
end
! C1028
subroutine s2
type(t) :: a
a%p => s
!ERROR: In assignment to object pointer 'q', the target 's' is a procedure designator
a%q => s
end
! C1029
subroutine s3
type(t) :: a
a%p => f() ! OK: pointer-valued function
!ERROR: Subroutine pointer 'p' may not be associated with function designator 'f'
a%p => f
contains
function f()
procedure(s), pointer :: f
f => s
end
end
! C1030 and 10.2.2.4 - procedure names as target of procedure pointer
subroutine s4(s_dummy)
procedure(s), intent(in) :: s_dummy
procedure(s), pointer :: p, q
procedure(), pointer :: r
integer :: i
external :: s_external
p => s_dummy
p => s_internal
p => s_module
q => p
r => s_external
contains
subroutine s_internal(i)
integer i
end
end
subroutine s_module(i)
integer i
end
! 10.2.2.4(3)
subroutine s5
procedure(f_pure), pointer :: p_pure
procedure(f_impure), pointer :: p_impure
!ERROR: Procedure pointer 'p_elemental' may not be ELEMENTAL
procedure(f_elemental), pointer :: p_elemental
p_pure => f_pure
p_impure => f_impure
p_impure => f_pure
!ERROR: PURE procedure pointer 'p_pure' may not be associated with non-PURE procedure designator 'f_impure'
p_pure => f_impure
contains
pure integer function f_pure()
f_pure = 1
end
integer function f_impure()
f_impure = 1
end
elemental integer function f_elemental()
f_elemental = 1
end
end
! 10.2.2.4(4)
subroutine s6
procedure(s), pointer :: p, q
procedure(), pointer :: r
external :: s_external
!ERROR: Procedure pointer 'p' with explicit interface may not be associated with procedure designator 's_external' with implicit interface
p => s_external
!ERROR: Procedure pointer 'r' with implicit interface may not be associated with procedure designator 's_module' with explicit interface
r => s_module
end
! 10.2.2.4(5)
subroutine s7
procedure(real) :: f_external
external :: s_external
procedure(), pointer :: p_s
procedure(real), pointer :: p_f
p_f => f_external
p_s => s_external
!ERROR: Subroutine pointer 'p_s' may not be associated with function designator 'f_external'
p_s => f_external
!ERROR: Function pointer 'p_f' may not be associated with subroutine designator 's_external'
p_f => s_external
end
! C1017: bounds-spec
subroutine s8
real, target :: x(10, 10)
real, pointer :: p(:, :)
p(2:,3:) => x
!ERROR: Pointer 'p' has rank 2 but the number of bounds specified is 1
p(2:) => x
end
! bounds-remapping
subroutine s9
real, target :: x(10, 10), y(100)
real, pointer :: p(:, :)
! C1018
!ERROR: Pointer 'p' has rank 2 but the number of bounds specified is 1
p(1:100) => x
! 10.2.2.3(9)
!ERROR: Pointer bounds remapping target must have rank 1 or be simply contiguous
p(1:5,1:5) => x(1:10,::2)
! 10.2.2.3(9)
!ERROR: Pointer bounds require 25 elements but target has only 20
p(1:5,1:5) => x(:,1:2)
!OK - rhs has rank 1 and enough elements
p(1:5,1:5) => y(1:100:2)
end
subroutine s10
integer, pointer :: p(:)
type :: t
integer :: a(4, 4)
integer :: b
end type
type(t), target :: x
type(t), target :: y(10,10)
integer :: v(10)
p(1:16) => x%a
p(1:8) => x%a(:,3:4)
p(1:1) => x%b ! We treat scalars as simply contiguous
p(1:1) => x%a(1,1)
p(1:1) => y(1,1)%a(1,1)
p(1:1) => y(:,1)%a(1,1) ! Rank 1 RHS
!ERROR: Pointer bounds remapping target must have rank 1 or be simply contiguous
p(1:4) => x%a(::2,::2)
!ERROR: Pointer bounds remapping target must have rank 1 or be simply contiguous
p(1:100) => y(:,:)%b
!ERROR: Pointer bounds remapping target must have rank 1 or be simply contiguous
p(1:100) => y(:,:)%a(1,1)
!ERROR: Pointer bounds remapping target must have rank 1 or be simply contiguous
!ERROR: An array section with a vector subscript may not be a pointer target
p(1:4) => x%a(:,v)
end
subroutine s11
complex, target :: x(10,10)
complex, pointer :: p(:)
real, pointer :: q(:)
p(1:100) => x(:,:)
q(1:10) => x(1,:)%im
!ERROR: Pointer bounds remapping target must have rank 1 or be simply contiguous
q(1:100) => x(:,:)%re
end
! Check is_contiguous, which is usually the same as when pointer bounds
! remapping is used. If it's not simply contiguous it's not constant so
! an error is reported.
subroutine s12
integer, pointer :: p(:)
type :: t
integer :: a(4, 4)
integer :: b
end type
type(t), target :: x
type(t), target :: y(10,10)
integer :: v(10)
logical, parameter :: l1 = is_contiguous(x%a(:,:))
logical, parameter :: l2 = is_contiguous(y(1,1)%a(1,1))
!ERROR: Must be a constant value
logical, parameter :: l3 = is_contiguous(y(:,1)%a(1,1))
!ERROR: Must be a constant value
logical, parameter :: l4 = is_contiguous(x%a(:,v))
!ERROR: Must be a constant value
logical, parameter :: l5 = is_contiguous(y(v,1)%a(1,1))
end
subroutine test3(b)
integer, intent(inout) :: b(..)
!ERROR: Must be a constant value
integer, parameter :: i = rank(b)
end subroutine
end
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