FMNullMultivalueLink does not support union: (FMNullMultivalueLink cannot have variable sized instances)

[seandenigris]

Originally reported on Google Code with ID 992

Describe the problem: what do you get? what do you expect?
Here is the code that we want to execute to combine in a same collection of a given
class its incomingReferences and its superInheritances:
(aClass incomingReferences) union: (aClass superInheritances)

If the first set of the union operator is empty, it is a FMNullMultivalueLink.
If the second set is not empty, the union: message creates a FMNullMultivalueLink with
the size of this second set. However, it is not possible to create a FMNullMultivalueLink
with a specified size.
We would like that its creates a FMMultivalueLink with the specified size.



Please fill in the labels with the following information:
* Type-Defect, Type-Enhancement, Type-Engineering, Type-Review, Type-Other
* Component-MooseCore

Reported by anne.etien on 2013-10-28 09:35:05

[seandenigris]

By adding back 
FMNullMultiValueLink>>species
      ^OrderedCollection

it works and all the tests are green.
In fact I previously removed this method at the beginning of September. But I found
today a case where it is useful so I put it again.

If you agree with this change, the issue can be closed.

Anne

Reported by anne.etien on 2013-10-28 10:36:32

[seandenigris]

Sounds good. Might be even better with a few tests.

Reported by stephan@stack.nl on 2013-10-28 13:38:43

[seandenigris]

Thanks for fixing this.

Reported by tudor@tudorgirba.com on 2013-11-11 05:21:51

• Status changed: Fixed
• Labels added: Milestone-5.0, Component-Fame