xref: /llvm-project/flang/test/Semantics/c_f_pointer.f90 (revision 2bc30f37ce7143fd30f21bd232e14aa787f6b08f)
1! RUN: %python %S/test_errors.py %s %flang_fc1 -pedantic
2! Enforce 18.2.3.3
3
4program test
5  use iso_c_binding, only: c_ptr, c_f_pointer
6  type(c_ptr) :: scalarC, arrayC(1)
7  type :: with_pointer
8    integer, pointer :: p
9  end type
10  type(with_pointer) :: coindexed[*]
11  integer, pointer :: scalarIntF, arrayIntF(:), multiDimIntF(:,:)
12  character(len=:), pointer :: charDeferredF
13  integer :: j
14  integer, dimension(2, 2) :: rankTwoArray
15  class(*), pointer :: unlimited
16  type :: notBindCType
17    integer :: n
18  end type
19  type(notBindCType), pointer :: notBindC
20  character(2), pointer :: c2ptr
21  character(1,4), pointer :: unicodePtr
22  rankTwoArray = reshape([1, 2, 3, 4], shape(rankTwoArray))
23  call c_f_pointer(scalarC, scalarIntF) ! ok
24  call c_f_pointer(scalarC, arrayIntF, [1_8]) ! ok
25  call c_f_pointer(shape=[1_8], cptr=scalarC, fptr=arrayIntF) ! ok
26  call c_f_pointer(scalarC, shape=[1_8], fptr=arrayIntF) ! ok
27  !ERROR: A positional actual argument may not appear after any keyword arguments
28  call c_f_pointer(scalarC, fptr=arrayIntF, [1_8])
29  !ERROR: CPTR= argument to C_F_POINTER() must be a C_PTR
30  call c_f_pointer(j, scalarIntF)
31  !ERROR: Rank of dummy argument is 0, but actual argument has rank 1
32  call c_f_pointer(arrayC, scalarIntF)
33  !ERROR: SHAPE= argument to C_F_POINTER() must appear when FPTR= is an array
34  call c_f_pointer(scalarC, arrayIntF)
35  !ERROR: SHAPE= argument to C_F_POINTER() may not appear when FPTR= is scalar
36  call c_f_pointer(scalarC, scalarIntF, [1_8])
37  !ERROR: FPTR= argument to C_F_POINTER() may not have a deferred type parameter
38  call c_f_pointer(scalarC, charDeferredF)
39  !ERROR: FPTR= argument to C_F_POINTER() may not be a coindexed object
40  !ERROR: A coindexed object may not be a pointer target
41  call c_f_pointer(scalarC, coindexed[0]%p)
42  !ERROR: FPTR= argument to C_F_POINTER() must have a type
43  call c_f_pointer(scalarC, null())
44  !ERROR: SHAPE= argument to C_F_POINTER() must have size equal to the rank of FPTR=
45  call c_f_pointer(scalarC, multiDimIntF, shape=[1_8])
46  !ERROR: SHAPE= argument to C_F_POINTER() must be a rank-one array.
47  call c_f_pointer(scalarC, multiDimIntF, shape=rankTwoArray)
48  !WARNING: FPTR= argument to C_F_POINTER() should not be unlimited polymorphic
49  call c_f_pointer(scalarC, unlimited)
50  !PORTABILITY: FPTR= argument to C_F_POINTER() should not have a derived type that is not BIND(C)
51  call c_f_pointer(scalarC, notBindC)
52  !WARNING: FPTR= argument to C_F_POINTER() should not have the non-interoperable character length CHARACTER(KIND=1,LEN=2_8)
53  call c_f_pointer(scalarC, c2ptr)
54  !WARNING: FPTR= argument to C_F_POINTER() should not have the non-interoperable intrinsic type or kind CHARACTER(KIND=4,LEN=1_8)
55  call c_f_pointer(scalarC, unicodePtr)
56end program
57