How to use std::find() on vector of objects

main.cpp

#include <iostream>
#include <algorithm>
#include <vector>
#include <iterator>

enum ItemType
{
    TORCH,
    KEY,
    GEM,
    PEBBLE
};

class Item
{
public:
    bool operator==(Item const& other) const {
        return this == other;
    }

    Item(ItemType)
        : type(type)
    {
    }

    ItemType type;
};

int main()
{
    std::vector<Item> backpack;
    backpack.push_back(TORCH);
    backpack.push_back(KEY);
    backpack.push_back(GEM);

    auto result = std::find(backpack.begin(), backpack.end(), TORCH);
    if (result != backpack.end())
        std::cout << "Found.\n";
    else
        std::cout << "Not found.\n";
    return 0;
}