Texture.hpp

//Texture.h
class Texture {
  #include <textypes_gl3.h> 

  void SetType(Type t);
};

// textypes_gl3.h
enum class Type {
  Tex_1D,
  Tex_2D
};

// textypes_gl4.h
enum class Type {
  Tex_1D,
  Tex_2D,
  Tex_3D
};