在c++中实例化自定义类并调用方法

static napi_value GetMsg(napi_env env, napi_callback_info info) { 
  size_t argc = 1; 
  napi_value argv[1] = {nullptr}; 
  napi_get_cb_info(env, info, &argc, argv, nullptr, nullptr); 
  ​ 
  napi_status status; 
  ​ 
  napi_value setFunc; 
  napi_get_named_property(env, argv[0], "setMsg", &setFunc); 
  ​ 
  napi_value code; 
  napi_create_uint32(env, 200, &code); 
  char strMsg[] = "OK"; 
  napi_value msg; 
  napi_create_string_utf8(env, strMsg, strlen(strMsg), &msg); 
  napi_value parameter[2]; 
  parameter[0] = code; 
  parameter[1] = msg; 
  status = napi_call_function(env, argv[0], setFunc, 2, parameter, nullptr); 
  napi_value logFunc; 
  napi_get_named_property(env, argv[0], "toLog", &logFunc); 
  status = napi_call_function(env, argv[0], logFunc, 0, nullptr, nullptr); 
  ​ 
  return nullptr; 
}

export class MsgResult { 
  code: number = 0; 
  msg: string = ""; 
  ​ 
  setMsg(code: number, msg: string) { 
    this.code = code; 
    this.msg = msg; 
  } 
  ​ 
  toLog() { 
    console.log(this.code + ":" + this.msg) 
  } 
} 
​ 
import testNapi from 'libentry.so'; 
import { MsgResult } from './MsgResult'; 
let r = new MsgResult() 
testNapi.getMsg(r);