private static GraceObject objectFromElement(XElement root)
{
GraceObject obj = GraceObject.Done;
var stringEl = root.XPathSelectElement("//string");
if (stringEl != null)
{
obj = GraceString.Create(stringEl.Value);
}
var numberEl = root.XPathSelectElement("//number");
if (numberEl != null)
{
double d;
if (double.TryParse(numberEl.Value, out d))
{
obj = GraceNumber.Create(d);
}
}
var objectEl = root.XPathSelectElement("//object");
if (objectEl != null)
{
int objKey;
if (int.TryParse(objectEl.Value, out objKey))
{
obj = new GraceForeignObject(objKey);
}
}
return(obj);
}
/// <summary>
/// Load extensions to builtins from traits in an
/// existing object.
/// </summary>
/// <param name="ext">Object containing extension traits.</param>
public void LoadExtensionsFromObject(GraceObject ext)
{
var req = MethodRequest.Nullary("ObjectExtension");
req.IsInherits = true;
if (ext.RespondsTo(req))
{
var uo = new UserObject();
req.InheritingObject = uo;
ext.Request(this, req);
GraceObject.ExtendDefaultMethods(req.InheritedMethods);
}
req = MethodRequest.Nullary("NumberExtension");
req.IsInherits = true;
if (ext.RespondsTo(req))
{
var uo = new UserObject();
req.InheritingObject = uo;
ext.Request(this, req);
GraceNumber.ExtendWith(req.InheritedMethods);
}
req = MethodRequest.Nullary("StringExtension");
req.IsInherits = true;
if (ext.RespondsTo(req))
{
var uo = new UserObject();
req.InheritingObject = uo;
ext.Request(this, req);
GraceString.ExtendWith(req.InheritedMethods);
}
}
private GraceObject mSize()
{
return(GraceNumber.Create(data.Length));
}
