private void UpdateCache(StoneObject target)
{
string memberName = this.Name;
this.ClassInfo = target.ClassInfo;
int index = this.ClassInfo.GetFieldIndex(memberName);
if (index != -1)
{
this.IsField = true;
this.Index = index;
return;
}
index = this.ClassInfo.GetMethodIndex(memberName);
if (index != -1)
{
this.IsField = false;
this.Index = index;
return;
}
throw new StoneException(string.Format("Bad member access: {0}", this.Name), this);
}
private void InitializeObject(ClassInfo classInfo, StoneObject stoneObject, IEnvironment environment)
{
if (classInfo.SuperClass != null)
{
this.InitializeObject(classInfo.SuperClass, stoneObject, environment);
}
classInfo.Body.Eval(environment);
}
private void SetField(StoneObject stoneObject, Dot expression, object rightValue)
{
if (stoneObject.ClassInfo != this.ClassInfo)
{
string memberName = expression.Name;
this.ClassInfo = stoneObject.ClassInfo;
int index = this.ClassInfo.GetFieldIndex(memberName);
if (index == -1)
{
throw new StoneException(string.Format("Bad member access: {0}", memberName), this);
}
this.Index = index;
}
stoneObject.Write(this.Index, rightValue);
}
public override object Eval(IEnvironment environment, object value)
{
string memberName = this.Name;
if (value is ClassInfo && memberName == "new")
{
ClassInfo classInfo = (ClassInfo)value;
IEnvironment newEnvironment = new Environment(1, classInfo.Environment);
StoneObject stoneObject = new StoneObject(classInfo, classInfo.Size);
newEnvironment.Put(0, 0, stoneObject);
this.InitializeObject(classInfo, stoneObject, newEnvironment);
return(stoneObject);
}
else if (value is StoneObject)
{
StoneObject target = (StoneObject)value;
if (target.ClassInfo != this.ClassInfo)
{
this.UpdateCache(target);
}
if (this.IsField)
{
return(target.Read(this.Index));
}
else
{
return(target.GetMethod(this.Index));
}
}
throw new StoneException(string.Format("Bad member access: {0}", memberName), this);
}
