public object VisitSuperExpr(Expr.Super expr)
{
if (_currentClass == ClassType.NONE)
{
Lox.Error(expr.Keyword, "Cannot use 'super' outside of a class.");
}
else if (_currentClass != ClassType.SUBCLASS)
{
Lox.Error(expr.Keyword, "Cannot use 'super' in a class with no superclass");
}
ResolveLocal(expr, expr.Keyword);
return(null);
}
public object VisitSuperExpr(Expr.Super expr)
{
int? distance = _locals[expr];
LoxClass superclass = (LoxClass)_environment.GetAt((int)distance, "super");
LoxInstance @object = (LoxInstance)_environment.GetAt((int)distance - 1, "this");
LoxFunction method = superclass.FindMethod(expr.Method.Lexeme);
if (method == null)
{
throw new RuntimeError(expr.Method, $"Undefined method '{expr.Method.Lexeme}'.");
}
return(method.Bind(@object));
}
public string Visit(Expr.Super expr)
{
throw new NotImplementedException();
}