(j3.2006) Did we intend to prohibit this?
Fri Mar 10 18:17:50 EST 2017
On Fri, 2017-03-10 at 17:12 -0500, Steve Lionel wrote:
> On 3/10/2017 5:00 PM, Van Snyder wrote:
> > According to 18.104.22.168p4, whatever the function result is, it must be
> > allocatable, or it couldn't be deallocated.
> The difference is that the programmer is not in control of the
> allocatable object once the function returns. As Tom says, you can see
> the value, but don't have a handle on the allocation. The processor is
> responsible for setting up the result variable as allocatable and
> deallocating it when the statement completes. You don't get to do
> anything to its allocation status or even reference it as if it were an
> As Malcolm wrote, the purpose of this feature is to allow a function to
> return an arbitrary-shape result, the shape of which is then used in the
> context of the function's value. Once the function returns, the fact
> that the result is allocatable is invisible to the programmer.
I wasn't able to deduce any of this from the standard. The standard
natters on about deallocating an allocatable function result as if it
actually is allocatable.
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