Reworked the way .NET objects are constructed from Python - #1651
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lostmsu merged 1 commit intoJan 4, 2022
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January 4, 2022 17:34
was: tp_new implementation would call .NET constructor and return a fully constructed object now: Except for some special .NET types tp_new creates uninitialized .NET object, which is later initialized by calling __init__. __init__ is set using type dictionary to a MethodObject, that contains ConstructorInfo[] instead of MethodInfo[] This allows Python to: 1) freely override __init__ 2) when deriving from .NET types call base __init__ (e.g. .NET constructor), and choose the overload as needed fixes pythonnet#238
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What does this implement/fix? Explain your changes.
Was:
tp_new implementation would call .NET constructor and return a fully constructed object
Now:
Except for some special .NET types tp_new creates uninitialized .NET object, which is later initialized by calling uninitialized_inst.__init__(...).
__init__ is set in type dictionary to a MethodObject, that contains ConstructorInfo[] instead of MethodInfo[]
This allows Python to:
Failing to call base __init__ in this scenario will lead to an undefined behavior.
Does this close any currently open issues?
fixes #238
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