/// <summary>
/// 8.10.5
/// </summary>
/// <param name="global"></param>
/// <param name="obj"></param>
/// <returns></returns>
internal static Descriptor ToPropertyDesciptor(IGlobal global, JsDictionaryObject owner, string name, JsInstance jsInstance)
{
if (jsInstance.Class != JsInstance.CLASS_OBJECT) {
throw new JsException(global.TypeErrorClass.New("The target object has to be an instance of an object"));
}
JsObject obj = (JsObject)jsInstance;
if ((obj.HasProperty("value") || obj.HasProperty("writable")) && (obj.HasProperty("set") || obj.HasProperty("get"))) {
throw new JsException(global.TypeErrorClass.New("The property cannot be both writable and have get/set accessors or cannot have both a value and an accessor defined"));
}
Descriptor desc;
JsInstance result = null;
if (obj.HasProperty("value")) {
desc = new ValueDescriptor(owner, name, obj["value"]);
}
else {
desc = new PropertyDescriptor(global, owner, name);
}
if (obj.TryGetProperty("enumerable", out result)) {
desc.Enumerable = result.ToBoolean();
}
if (obj.TryGetProperty("configurable", out result)) {
desc.Configurable = result.ToBoolean();
}
if (obj.TryGetProperty("writable", out result)) {
desc.Writable = result.ToBoolean();
}
if (obj.TryGetProperty("get", out result)) {
if (!(result is JsFunction))
throw new JsException(global.TypeErrorClass.New("The getter has to be a function"));
((PropertyDescriptor)desc).GetFunction = (JsFunction)result;
}
if (obj.TryGetProperty("set", out result)) {
if (!(result is JsFunction))
throw new JsException(global.TypeErrorClass.New("The setter has to be a function"));
((PropertyDescriptor)desc).SetFunction = (JsFunction)result;
}
return desc;
}
public void Visit(PropertyDeclarationExpression expression)
{
switch (expression.Mode)
{
case PropertyExpressionType.Data:
expression.Expression.Accept(this);
Result = new ValueDescriptor(CurrentScope, expression.Name, Result);
break;
case PropertyExpressionType.Get:
case PropertyExpressionType.Set:
JsFunction get = null, set = null;
if (expression.GetExpression != null)
{
expression.GetExpression.Accept(this);
get = (JsFunction)Result;
}
if (expression.SetExpression != null)
{
expression.SetExpression.Accept(this);
set = (JsFunction)Result;
}
Result = new PropertyDescriptor(Global, CurrentScope, expression.Name) { GetFunction = get, SetFunction = set, Enumerable = true };
break;
default:
break;
}
}
public void Visit(PropertyDeclarationExpression expression)
{
// previous result was the object in which we need to define a property
var target = Result as JsDictionaryObject;
switch (expression.Mode) {
case PropertyExpressionType.Data:
expression.Expression.Accept(this);
Result = new ValueDescriptor(target, expression.Name, Result);
break;
case PropertyExpressionType.Get:
case PropertyExpressionType.Set:
JsFunction get = null, set = null;
if (expression.GetExpression != null) {
expression.GetExpression.Accept(this);
get = (JsFunction)Result;
}
if (expression.SetExpression != null) {
expression.SetExpression.Accept(this);
set = (JsFunction)Result;
}
Result = new PropertyDescriptor(Global, target, expression.Name) { GetFunction = get, SetFunction = set, Enumerable = true };
break;
default:
break;
}
}