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f025e41174
The POINTER= and TARGET= arguments to the intrinsic function ASSOCIATED() can be the results of references to functions that return object pointers or procedure pointers. NULL() was working well but not program-defined pointer-valued functions. Correct the validation of ASSOCIATED() and extend the infrastructure used to detect and characterize procedures and pointers.
48 lines
1.7 KiB
Fortran
48 lines
1.7 KiB
Fortran
! RUN: %python %S/test_errors.py %s %flang_fc1 -pedantic
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! Tests of selectors whose defining expressions are pointer-valued functions;
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! they must be valid targets, but not pointers.
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! (F'2018 11.1.3.3 p1) "The associating entity does not have the ALLOCATABLE or
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! POINTER attributes; it has the TARGET attribute if and only if the selector
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! is a variable and has either the TARGET or POINTER attribute."
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module m1
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type t
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contains
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procedure, nopass :: iptr
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end type
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contains
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function iptr(n)
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integer, intent(in), target :: n
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integer, pointer :: iptr
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!WARNING: Pointer target is not a definable variable
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!BECAUSE: 'n' is an INTENT(IN) dummy argument
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iptr => n
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end function
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subroutine test
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type(t) tv
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integer, target :: itarget
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integer, pointer :: ip
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associate (sel => iptr(itarget))
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ip => sel
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!ERROR: POINTER= argument of ASSOCIATED() must be a pointer
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if (.not. associated(sel)) stop
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end associate
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associate (sel => tv%iptr(itarget))
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ip => sel
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!ERROR: POINTER= argument of ASSOCIATED() must be a pointer
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if (.not. associated(sel)) stop
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end associate
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associate (sel => (iptr(itarget)))
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!ERROR: In assignment to object pointer 'ip', the target 'sel' is not an object with POINTER or TARGET attributes
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ip => sel
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!ERROR: POINTER= argument of ASSOCIATED() must be a pointer
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if (.not. associated(sel)) stop
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end associate
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associate (sel => 0 + iptr(itarget))
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!ERROR: In assignment to object pointer 'ip', the target 'sel' is not an object with POINTER or TARGET attributes
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ip => sel
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!ERROR: POINTER= argument of ASSOCIATED() must be a pointer
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if (.not. associated(sel)) stop
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end associate
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end subroutine
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end module
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