Question about structures,intent(in),pointer elements

[Mikael Morin]

Le 01/02/2014 15:55, Rimvydas Jasinskas a écrit :
> Just to be clear I understand that this *is* defined by f2003 and
> f2008 standard:
>       NOTE 5.13
>       If a dummy argument is a derived-type object with a pointer
> component, then the pointer as a
>       pointer is a subobject of the dummy argument, but the target of
> the pointer is not. Therefore, the
>       restrictions on subobjects of the dummy object apply to the
> pointer in contexts where it is used as
>       a pointer, but not in contexts where it is dereferenced to
> indicate its target. For example, if X is a
>       dummy argument of derived type with an integer pointer component
> P, and X has INTENT(IN),
>       then the statement
>       X%P => NEW_TARGET
>       is prohibited, but
>       X%P = 0
>       is allowed (provided that X%P is associated with a definable target).
> 
> What worries me, that only easy way to detect this behaviour with gfortran
> is by changing pointer->allocatable, that is very hard for deeply
> nested structures.
> Or alternatively use ifort, since it currently  rejects code like this...
> 
So you don't want to be able to change the value of your argument but
you want to be able to deallocate/retarget it?
I don't think it's possible; at least it would go against the principle
of INTENT(IN) which tells: this value doesn't change.

Mikael