2021-04-14 quickjs调用类的非静态成员函数

class MyClass
{
public:
    MyClass() {}
    MyClass(std::vector<int>) {}

    double member_variable = 5.5;
    std::string member_function(const std::string& s) { return "Hello, " + s + " " + std::to_string(member_variable); }
};

void println(const std::string& str) { std::cout << str << std::endl; }

MyClass* pGlobalMyClass = NULL;

int main()
{
    qjs::Runtime runtime;
    qjs::Context context(runtime);
    try
    {
        // export classes as a module
        auto& module = context.addModule("MyModule");
        module.function<&println>("println");
        module.class_<MyClass>("MyClass")
                .constructor<>()
                .constructor<std::vector<int>>("MyClassA")
                .fun<&MyClass::member_variable>("member_variable")
                .fun<&MyClass::member_function>("member_function");
        // import module
        context.eval("import * as my from 'MyModule'; globalThis.my = my;", "<import>", JS_EVAL_TYPE_MODULE);
        // evaluate js code
        context.eval(
                     "let v1 = new my.MyClass();" "\n"
        );
        context.eval(
                "function my_callback(str) {" "\n"
                "  my.println(v1.member_function(str));" "\n"
                "}" "\n"
        );
        // callback
        auto cb = (std::function<void(const std::string&)>) context.eval("my_callback");
        cb("world");

        context.eval("v1.member_variable=" + std::to_string(3) + ";\n");

        cb("world");
    }
    catch(qjs::exception)
    {
        auto exc = context.getException();
        std::cerr << (std::string) exc << std::endl;
        if((bool) exc["stack"])
            std::cerr << (std::string) exc["stack"] << std::endl;
        return 1;
    }
}

Hello, world 5.500000
Hello, world 3.000000