Hello everyone,
Let me make sure I get this right. Two or more PDLs are being operated on
to produce a result, but nowhere are the two consulted for a desired output
type or initialization. This has been tracked down to a loss of context
somewhere in the chain of function calls. There are two prob
currently, I ran into this issue as well. It would help a lot if
initialize would receive information on what it triggered, i.e. the call
stack.
The call of sin($x) should give in initialize @_ =($class, &operation,
@arguments) .
Is this doable? I think it is mostly code in PP.pm but I don't
under
Another possible wart in the PDL operator overloading is that the
overloaded functions are done as &PDL::operation and not 'operation'
strings which could be resolved and a method or overridden in the
subclass. I don't know if that is relevant to the OO implementation using
"has a" in place of "i
Looks interesting, but not well maintained; neither of the two issues
reported had
a reply.
On Tue, Oct 25, 2016 at 1:55 PM, Chris Marshall wrote:
> You might take a look at
> http://search.cpan.org/~dconway/Class-Multimethods-1.70/ which does a
> perl-level implementation of multimethods. Doe
Overloading is definitely an issue. but the assumptions made by
initialize() shouldn't be overlooked. I'll expand the text in
PDL::Objects to discuss them.
On Tue, Oct 25, 2016 at 10:30 AM, Chris Marshall wrote:
> On re-reading, I think the problem we're really discussing here is
> the operator o
You might take a look at
http://search.cpan.org/~dconway/Class-Multimethods-1.70/ which does a
perl-level implementation of multimethods. Does this resolve these
overload issues? (For what it is worth, the C Object System, COS, support
multimethod resolution and so using it for PDL::NextGen might
On re-reading, I think the problem we're really discussing here is
the operator overloading and the difficulty seems to be because the
overload resolution doesn't handle selection between two classes.
It is this that "forces" the result to be PDL or MyPDL. I'm not sure
a real solution is possible
Diab,
from my - very limited - experience with inheriting PDL
(PDL::IO::Nifti), I end using the native piddle ($myvar->{PDL}) for
everything than the most basic operations; I've wrapped that into a
method. Is this an acceptable work around for your use case? The
left-hand side will always have to
Thanks for the additional clarification for context---what a mess!
>From your example, it seems that the current PDL approach for OO via
"has-a" doesn't work but my question is what method would work? Is there
an example of an OO language or framework that can be shown to work for
this type of pr
On Mon, Oct 24, 2016 at 12:43 PM, Diab Jerius wrote:
> initialize() currently must assume that object construction can be
> done without any arguments to the constructor. That's inappropriate
> in some instances (as described above).
And once more, to clarify...
initialize() is not passed any c
On Mon, Oct 24, 2016 at 12:43 PM, Diab Jerius wrote:
> initialize() currently must assume that object construction can be
> done without any arguments to the constructor.
I shouldn't have used the word "currently", as that implies there's a
way of changing its behavior, and I don't have any good
On Sat, Oct 22, 2016 at 2:57 PM, Chris Marshall wrote:
> Hi Diab-
>
> I haven't done much with subclassing from PDL but
> I have noted some warts as in PDL::Complex.
>
> For the PDL::NextGen work I would like to have an
> approach that is interoperable with Moo[se] and
> possibly other OO framewor
Hi Diab-
I haven't done much with subclassing from PDL but
I have noted some warts as in PDL::Complex.
For the PDL::NextGen work I would like to have an
approach that is interoperable with Moo[se] and
possibly other OO frameworks. One thought was to
make PDL-ness a Role rather than a class as th
I've been having lots of fun lately creating complex classes which
inherit from PDL. Unfortunately, when PDL creates objects on the fly,
e.g. when it needs to store the result of an operation:
$mpdl = MyPDL->new;
$npdl = $mpdl + 1; # $npdl will be of class MyPDL
it can't pass along any addit
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