🐛 change _GetLocalTransformForDagPoseMember check from maya api version to diffrence_type iterator trait support, since 2019's MArrayIteratorTemplate.h has missing iterator traits.

[sun-frog]

Maya 2019 MArrayIteratorTemplate.h has missing iterator traits. This has been fix in Maya 2020 onwards.

[williamkrick]

@sun-frog I dug into this internally and found that Maya 2019.3 doesn't have the missing iterator traits but some later patch fixes available to some enterprise customers do have the traits. The change you've proposed here will disable the code for some versions that do have support for the iterators. In this case I'm okay with disabling the code in 2019 because it is a debug sanity check to validate behavior rather than some user-visible behavior.

For completeness I'll include how to correctly detect that Maya has the required API. In FindMaya.cmake you can copy the pattern used for MAYA_UPDATE_UFE_IDENTIFIER_SUPPORT. This build code does a regular expression search for a specified string in a Maya API header file. In this case we'd need to search MArrayIteratorTemplate.h for "difference_type" and then set an new env var when it is present.

[seando-adsk]

@sun-frog I was about to merge your change, but there is a conflict that needs to be resolved first.