functions address

I have this:

Code:

---


bool cmpItem (Item fst, Item snd) {
    ...
}

class Item {
    ...
};

class Character {
    ...
    list<Item> items;
    void addItem(Item item) {
        ...
        items.sort(cmpItem);
    }
};

---

which works fine. But just for organizing better my code, I would like cmpItem do be inside the Item class. But then the code "items.sort(cmpItem)" doesn't compile, since cmpItem is probably at the wrong scope. Is there a way to do this?

You either need to make CmpItem a static function (which is probabky what you want if you want to pass it to something that takes a generic function pointer), or you need to use the "class-member function pointer", as described here. http://www.parashift.com/c++-faq-lit...o-members.html

Most fo the time when you think you need a pointer-to-member-function, it's probably better to solve the problem with deriving different variants of the class, instead of using pointers. There are exceptions to this rule, but most of the time it's true.

--
Mats

Btw, addItem should probably take a reference, not by-value.

Quote:

---

Originally Posted by Elysia

Btw, addItem should probably take a reference, not by-value.

---

I don't change the item, just add it to the list. But now that you mention it, it should be const.

I knew the static keyword was useful :P (first time using it)