Question

我想从传递字符串参数的Javascript代码中调用用C ++编写的方法。我找到的解决方案是使用Node.js和SWIG生成绑定。

我从这里开始跟踪示例（参见enobayram帖子）：How can I use a C++ library from node.js?

C ++方法如下：

Handle<Value> CMyClass::Open(const v8::Arguments& args)
{
 HandleScope scope;

 std::string port(*v8::String::Utf8Value(args[0]));
 std::cout << port << std::endl;

 return scope.Close(Undefined());
}

从Node.js控制台：

var toto = require("./build/Release/MyClass")

var c = new toto.CMyClass()

c.Open("test")
Error: in method 'CMyClass_Open', argument 2 of type 'v8::Arguments const &'
    at repl:1:4
    at REPLServer.self.eval (repl.js:110:21)
    at Interface.<anonymous> (repl.js:239:12)
    at Interface.EventEmitter.emit (events.js:95:17)
    at Interface._onLine (readline.js:202:10)
    at Interface._line (readline.js:531:8)
    at Interface._ttyWrite (readline.js:760:14)
    at ReadStream.onkeypress (readline.js:99:10)
    at ReadStream.EventEmitter.emit (events.js:98:17)
    at emitKey (readline.js:1095:12)

有什么想法吗？非常感谢

Answer 1

在你的swig_wrapper.i（或示例中的mylib.i）中，在行%include "std_string.i"之前添加%include myclass.h，然后重新运行swig。

引文：http://www.swig.org/Doc1.3/Library.html#Library_stl_cpp_library

std::deque      std_deque.i
std::list       std_list.i
std::map        std_map.i
std::pair       std_pair.i
std::set        std_set.i
std::string     std_string.i
std::vector     std_vector.i

C ++示例：

/* C++ --> JavaScript */
std::string testOut() {
    return "Hello World!";
}

/* JavaScript --> C++ */
void testIn(std::string args) {
    std::cout << "Result: " << args << std::endl;
}

将字符串参数从node.js传递给C ++代码（使用SWIG）

1 个答案: