用Cython封装枚举类 [英] Wrap enum class with Cython

问题描述

我试图将枚举类包装在c ++头文件中以用于cython项目.

I am trying to wrap an enum class in a c++ header file for use in a cython project.

例如，如何

enum class Color {red, green = 20, blue};

用Cython包裹起来.

be wrapped with Cython.

推荐答案

CPP类

enum class Color {red, green = 20, blue}; 

类型的定义

来自"colors.h"的

Definition of type

cdef extern from "colors.h":
  cdef cppclass Color:
    pass

颜色类型的定义

来自"colors.h"命名空间"Color"的

Definition of color types

cdef extern from "colors.h" namespace "Color":
  cdef Color red
  cdef Color green
  cdef Color blue

Python实现

cdef class PyColor:
  cdef Color thisobj
  def __cinit__(self, int val):
    self.thisobj = <Color> val

  def get_color_type(self):
    cdef c = {<int>red : "red", <int> green : "green", <int> blue : "blue"}
    return c[<int>self.thisobj]

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