internal ScriptValue OrdinaryToPrimitive([NotNull] ScriptObject obj, ScriptValue.Type preferredType)
{
//https://tc39.github.io/ecma262/#sec-ordinarytoprimitive
var methodNames = new string[2];
if (preferredType == ScriptValue.Type.String)
{
methodNames[0] = "toString";
methodNames[1] = "valueOf";
}
else
{
methodNames[0] = "valueOf";
methodNames[1] = "toString";
}
foreach (var methodName in methodNames)
{
var method = obj.Get(methodName, obj);
if (IsCallable(method))
{
var result = Call((ScriptObject)method, obj);
if (!result.IsObject)
{
return(result);
}
}
}
throw CreateTypeError();
}
internal ScriptValue ToPrimitive(ScriptValue input, ScriptValue.Type preferredType = ScriptValue.Type.Undefined)
{
if (input.IsObject)
{
var exoticToPrimitive = GetMethod(input, Symbol.ToPrimitive);
if (exoticToPrimitive != null)
{
string hint;
if (preferredType == ScriptValue.Type.Undefined)
{
hint = "default";
}
else if (preferredType == ScriptValue.Type.String)
{
hint = "string";
}
else
{
hint = "number";
}
var result = Call(exoticToPrimitive, input, hint);
if (!result.IsObject)
{
return(result);
}
throw CreateTypeError();
}
if (preferredType != ScriptValue.Type.String)
{
preferredType = ScriptValue.Type.Number;
}
return(OrdinaryToPrimitive((ScriptObject)input, preferredType));
}
return(input);
}
private static ScriptValue GetOwnPropertyKeys([NotNull] Agent agent, ScriptValue value, ScriptValue.Type type)
{
//https://tc39.github.io/ecma262/#sec-getownpropertykeys
var obj = agent.ToObject(value);
var keys = obj.OwnPropertyKeys();
var nameList = keys.Where(x => x.ValueType == type);
return(ArrayIntrinsics.CreateArrayFromList(agent, nameList));
}
