pub type PFNGLPATHDASHARRAYNVPROC = Option<unsafe extern "C" fn(path: GLuint, dashCount: GLsizei, dashArray: *const GLfloat)>;
enum PFNGLPATHDASHARRAYNVPROC { None, Some(unsafe extern "C" fn(_: u32, _: i32, _: *const f32)), }
No value.
Some value of type T.
T