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Optionally use __slots__ for payload members #259
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added 5 commits
November 18, 2016 01:35
- Expose using slot based generated code to load entry points
- Add first tests
- TODO:
- Fix possible cache poisoning when loading slot vs no slot structs
- Add tests for above
- Add pickling tests for slot based structs
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There are still a few questions and some cleanup to be done, but I think this should get the conversation started. |
- Replace class with a newer one with slot fields - Implement subclass and instance checks
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Feature accepted. Update this issue later. |
During the first creation of the loaded class with slots, a new class is
inserted into the inheritance chain to ensure that the slot fields are defined.
This is done because of the need to create an empty struct during the
parsing phase and fill it in later - slots require the fields to be known before hand.
All checks on the new replacement class will have it looking like the
original except an equality comparison between the replaced class and
its replacement.
>>> import thriftpy
>>> ab = thriftpy.load('addressbook.thrift', use_slots=True)
>>> ab_inst = ab.AddressBook()
>>> ab_inst.__class__ == ab.AddressBook # will return False
>>> # all other checks should work as expected
>>> isinstance(ab_inst, ab.AddressBook) # will return True
>>> issubclass(ab_inst.__class__, ab.AddressBook) # will return True
In order to get pickling to work as expected, a new extension type is
registered with copyreg (copy_reg for py2x) to avoid pickling errors.
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I have updated the implementation to support all types of objects as well as the recursive case. The service args and results are now created with slots as well. |
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This is now ready for review. |
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Fixes #198