3425f226fc
There are a few well-meaning warnings for some cases of the FPTR= argument to C_F_POINTER() that can be false positives, since the restrictions in the standard are dependent on the source of the CPTR= argument. Further, there is no way to alter a program to avoid these warnings, so one cannot compile a correct and conforming program with -pedantic -Werror. Disable these warnings. Fixes https://github.com/llvm/llvm-project/issues/167470.
70 lines
3.5 KiB
Fortran
70 lines
3.5 KiB
Fortran
! RUN: %python %S/test_errors.py %s %flang_fc1 -pedantic
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! Enforce 18.2.3.3
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program test
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use iso_c_binding, only: c_ptr, c_f_pointer
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type(c_ptr) :: scalarC, arrayC(1)
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type :: with_pointer
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integer, pointer :: p
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end type
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type(with_pointer) :: coindexed[*]
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integer, pointer :: scalarIntF, arrayIntF(:), multiDimIntF(:,:)
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character(len=:), pointer :: charDeferredF
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integer :: j
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integer, dimension(2, 2) :: rankTwoArray
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class(*), pointer :: unlimited
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type :: notBindCType
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integer :: n
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end type
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type(notBindCType), pointer :: notBindC
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character(2), pointer :: c2ptr
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character(1,4), pointer :: unicodePtr
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rankTwoArray = reshape([1, 2, 3, 4], shape(rankTwoArray))
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call c_f_pointer(scalarC, scalarIntF) ! ok
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call c_f_pointer(scalarC, arrayIntF, [1_8]) ! ok
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call c_f_pointer(shape=[1_8], cptr=scalarC, fptr=arrayIntF) ! ok
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call c_f_pointer(scalarC, shape=[1_8], fptr=arrayIntF) ! ok
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!ERROR: A positional actual argument may not appear after any keyword arguments
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call c_f_pointer(scalarC, fptr=arrayIntF, [1_8])
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!ERROR: CPTR= argument to C_F_POINTER() must be a C_PTR
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call c_f_pointer(j, scalarIntF)
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!ERROR: Rank of dummy argument is 0, but actual argument has rank 1
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call c_f_pointer(arrayC, scalarIntF)
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!ERROR: SHAPE= argument to C_F_POINTER() must appear when FPTR= is an array
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call c_f_pointer(scalarC, arrayIntF)
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!ERROR: SHAPE= argument to C_F_POINTER() may not appear when FPTR= is scalar
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call c_f_pointer(scalarC, scalarIntF, [1_8])
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!ERROR: FPTR= argument to C_F_POINTER() may not have a deferred type parameter
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call c_f_pointer(scalarC, charDeferredF)
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!ERROR: cosubscript 0 is less than lower cobound 1 for codimension 1 of array
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!ERROR: FPTR= argument to C_F_POINTER() may not be a coindexed object
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!ERROR: A coindexed object may not be a pointer target
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call c_f_pointer(scalarC, coindexed[0]%p)
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!ERROR: FPTR= argument to C_F_POINTER() must have a type
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call c_f_pointer(scalarC, null())
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!ERROR: SHAPE= argument to C_F_POINTER() must have size equal to the rank of FPTR=
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call c_f_pointer(scalarC, multiDimIntF, shape=[1_8])
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!ERROR: SHAPE= argument to C_F_POINTER() must be a rank-one array.
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call c_f_pointer(scalarC, multiDimIntF, shape=rankTwoArray)
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!These warnings have been disabled because the C_F_POINTER's restrictions
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!are dependent on the source of the CPTR= argument. Each warning here
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!might be a false positive for a valid program.
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!!WARNING: FPTR= argument to C_F_POINTER() should not be unlimited polymorphic [-Winteroperability]
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call c_f_pointer(scalarC, unlimited)
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!!PORTABILITY: FPTR= argument to C_F_POINTER() should not have a derived type that is not BIND(C) [-Wportability]
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call c_f_pointer(scalarC, notBindC)
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!!WARNING: FPTR= argument to C_F_POINTER() should not have the non-interoperable character length CHARACTER(KIND=1,LEN=2_8) [-Wcharacter-interoperability]
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call c_f_pointer(scalarC, c2ptr)
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!!WARNING: FPTR= argument to C_F_POINTER() should not have the non-interoperable intrinsic type or kind CHARACTER(KIND=4,LEN=1_8) [-Winteroperability]
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call c_f_pointer(scalarC, unicodePtr)
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!ERROR: SHAPE= argument to C_F_POINTER() may not appear when FPTR= is scalar
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!ERROR: LOWER= argument to C_F_POINTER() may not appear when FPTR= is scalar
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call c_f_pointer(scalarC, scalarIntF, [1_8], [0_8])
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!ERROR: LOWER= argument to C_F_POINTER() must be a rank-one array.
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call c_f_pointer(scalarC, arrayIntF, shape=[1_8], lower=rankTwoArray)
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!ERROR: SHAPE= argument to C_F_POINTER() must appear when FPTR= is an array
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call c_f_pointer(scalarC, arrayIntF, lower=[0])
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end program
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