public object visitSuperExpr(Expr.Super expr)
{
if (currentClass == ClassType.NONE)
{
Lox.error(expr.Keyword,
"Cannot use 'super' outisde of 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)env.getAt(
distance, "super");
LoxInstance instance = (LoxInstance)env.getAt(
distance - 1, "this");
LoxFunction method = superClass.findMethod(expr.Method.Lexeme);
if (method == null)
{
throw new RuntimeError(expr.Method,
$"Undefined propert '{expr.Method.Lexeme}'");
}
return(method.bind(instance));
}
public string visitSuperExpr(Expr.Super expr)
{
throw new NotImplementedException();
}