public JsValue EvaluateNewExpression(NewExpression newExpression)
{
var arguments = newExpression.Arguments.Select(EvaluateExpression).Select(_engine.GetValue).ToArray();
// todo: optimize by defining a common abstract class or interface
var callee = _engine.GetValue(EvaluateExpression(newExpression.Callee)).TryCast<IConstructor>();
if (callee == null)
{
throw new JavaScriptException(_engine.TypeError, "The object can't be used as constructor.");
}
// construct the new instance using the Function's constructor method
var instance = callee.Construct(arguments);
return instance;
}
private void EmitNewExpression(NewExpression e)
{
Write("new ");
Emit(e.Callee);
EmitFunctionCallArguments(e.Arguments);
}