[Ironpython-users] Binding problem with default parameters in public classes

Markus Schaber m.schaber at codesys.com
Mon Aug 29 06:10:04 EDT 2016


Our tests recently caught a strange regression in our application. One can make existing scripts fail by changing an internal class to public.

The attached program reproduces the issue. The problem is that the method has optional parameters, but those are only declared at the interface.

Now, when the class changes from “internal” to “public”, IronPython binds directly to the public methods without considering the interfaces any more, and thus does not recognize the optional parameters.

Now, the question is whether this could be considered a bug in IronPython, or whether it should be considered a bug to implement an interface method without replicating the default parameter values…

Best regards

Markus Schaber

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