How to instantiate a transform?

[spyridon97]

In the past, Iotr::Factory was part of Ioss_transform.h.

This has been moved in Iotr_Factory.h

Are we supposed to include Iotr_Factory.h to create a transform such as

    auto transform = std::unique_ptr<Ioss::Transform>(Iotr::Factory::create("offset"));
    transform->set_property("offset", -1);

Or is there another way, such that we don't need to include?

[gsjaardema]

That should be how it is done. You need to include transform/Iotr_Factory.h

The change was made about a year ago:

commit 5fa52564b446a67c7058060ce2ef520a099a98d6
Author: Ben Boeckel <ben.boeckel@kitware.com>
Date:   Wed Oct 26 12:34:44 2022 -0400

    ioss: move Iotr_Factory to its own header

    In the right library of course.

[spyridon97]

maybe it would be convenient to have a create factory function in ioss_transform.h. which internally would return a Iotr::Factory.

[gsjaardema]

Yes, maybe Ioss::Transform *Ioss::create_transform(const std::string &transform_type)

[gsjaardema]

I will have to think about this some more -- the simple implementation makes Ioss library depend on Iotr library which is the reverse of how it should be... I will look more at Iotr::Factory and see whether it really needs to be in the Iotr library, or whether it could live at the IOSS level (which is where it was at one time...)

[spyridon97]

Maybe you could have Ioss::TransformFactory like Ioss::IOFactory. And remove Iotr::Factory.

[gsjaardema]

See #434

[gsjaardema]

I tihnk this can be closed. Please reopen if still problems with the fix.