public Object GetProperty(Token name)
{
if (Fields.ContainsKey(name.Lexeme))
{
return(Fields[name.Lexeme]);
}
CoxFunction method = Klass.FindMethod(this, name.Lexeme);
if (method != null)
{
return(method);
}
throw new RuntimeError(name, "Undefined property '" + name.Lexeme + "'.");
}
public object VisitSuperExpr(Super expr)
{
int distance = Locals[expr];
CoxClass superclass = (CoxClass)Environment.GetAt(distance, "super");
// "this" is always one level nearer than "super"'s environment.
CoxInstance receiver = (CoxInstance)Environment.GetAt(distance - 1, "this");
CoxFunction method = superclass.FindMethod(receiver, expr.Method.Lexeme);
if (method == null)
{
throw new RuntimeError(expr.Method, $"Undefined property '{expr.Method.Lexeme}'.");
}
return(method);
}