Using C++ enum class in Python dict

[Eduardo Ponce]

Hi,

I am able to take a C++ unscoped enum defined in .pxd as cdef enum UnscopedEnum and use it as dictionary values in a .pyx file. Nevertheless, this does not seems to work for C++ scoped enums. I define it as ctypedef enum ScopedEnum but Cython triggers an error because it can't operate between ScopedEnum objects and integers.

Is there a simple workaround without having to create a helper class that explicitly casts the scoped enum to integers?

Thanks in advance,

~Eduardo

[D Woods]

Scoped enums are explicitly supported in the Cython 3 alpha:

https://cython.readthedocs.io/en/latest/src/userguide/wrapping_CPlusPlus.html#scoped-enumerations - you can use "cpdef" to define a type that can be passed to Python (see https://github.com/cython/cython/blob/master/tests/run/cpdef_scoped_enums.pyx for some examples)

For earlier versions of Cython the workaround involved manually setting the names for the generated code in "strings" - see https://stackoverflow.com/questions/31001918/wrap-enum-class-with-cython

[da-woods]

Scoped enums are explicitly supported in the Cython 3 alpha:

https://cython.readthedocs.io/en/latest/src/userguide/wrapping_CPlusPlus.html#scoped-enumerations - you can use "cpdef" to define a type that can be passed to Python (see https://github.com/cython/cython/blob/master/tests/run/cpdef_scoped_enums.pyx for some examples)

For earlier versions of Cython the workaround involved manually setting the names for the generated code in "strings" - see https://stackoverflow.com/questions/31001918/wrap-enum-class-with-cython

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[Eduardo Ponce]

Thanks for the prompt response!

You clarified my question for handling scoped enums.

~Eduardo