使用Kotlin和Duktape在Android中进行JS传播语法

Question

我正在使用Duktape在Android应用程序中运行JS代码。我正在尝试在JS中实现一个接收多个varargs参数的日志函数。 运行代码时出现异常：

方法抛出“ com.squareup.duktape.DuktapeException”异常。 SyntaxError：预期的标识符（第3行）

Duktape是否支持Spread syntax？一般是否支持Kotlin可选件？

//JS code
"""
    var Console = {
        log : function(...args) {
            __consoleImpl.log(args);
                    }
            };
"""

//Kotlin interface
interface Console {

    fun log(arg1:String? = null, arg2:String? = null, arg3:String? = null, arg4:String? = null,
            arg5:String? = null, arg6:String? = null, arg7:String? = null, arg8:String? = null,
            arg9:String? = null, arg10:String? = null)
}


//Interface impl
class ConsoleImpl() : Console {

    override fun log(arg1: String?, arg2: String?, arg3: String?, arg4: String?, arg5: String?, arg6: String?, arg7: String?, arg8: String?, arg9: String?, arg10: String?) {
    val values = listOfNotNull(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10).map {it.toString()}.filter { it != "undefined" }
    Log.d("ConsoleImpl", values.joinToString())
    }
}

//in setup
duktape.set("__consoleImpl", Console::class.java, ConsoleImpl())
duktape.evaluate("Console.log("message")) //exception thrown here

Answer 1

duktape仅完全支持ES5，以及ES6和ES7（see post ES5 features）的一些功能。传播语法是ES6的功能。