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Defining enums in Cython code that will be used in the C part of code

I have defined and enum in cython header file api.pxd: 

ctypedef enum InstructionType:
    default = 0
    end_if = 1
    end_loop = 2
    backward_jump_here = 4

I also have checked if turning ctypedef to cdef would work (and it didn't).

And I want to use value from this enum in __cinit__ method fo some class: 

from api cimport Instruction, CLinVM, InstructionType

# (...) some other classes

cdef class EndIf(Noop):
   def __cinit__(self):
      self.type = InstructionType.end_if

And I get compilation error: 

    self.type = InstructionType.end_if
                              ^
------------------------------------------------------------
 /home/(...)/instructions.pyx:149:35: 'InstructionType' is not a constant,

Any way to define and use enum in such way?

Solution

  • You do not access enumerated constants through their typename they belong to, neither in C, nor in C++, nor in Cython. You'd need to create a wrapper .pxd for it.