public LoxFunction bind(LoxInstance instance)
{
Environment environment = new Environment(closure);
environment.define("this", instance);
return(new LoxFunction(declaration, environment, isInitializer));
}
public object call(Interpreter interpreter, List <object> arguments)
{
LoxInstance instance = new LoxInstance(this);
LoxFunction initializer = findMethod("init");
if (initializer != null)
{
initializer.bind(instance).call(interpreter, arguments);
}
return(instance);
}
public object visitSuperExpr(Expr.Super expr)
{
int distance = locals[expr];
LoxClass superclass = (LoxClass)environment.getAt(distance, "super");
// "this" is always one level nearer than "super"'s environment
LoxInstance object_ = (LoxInstance)environment.getAt(distance - 1, "this");
LoxFunction method = superclass.findMethod(expr.method.lexeme());
if (method == null)
{
throw new RuntimeError(expr.method, "Undefined property '" + expr.method.lexeme() + "'.");
}
return(method.bind(object_));
}