How do I find elements with custom comparators with std::deque for embedded targets?

To find elements in a `std::deque` using a custom comparator, you can define a comparator function or a functor and use algorithms like `std::find_if`. Below is an example demonstrating this approach:

#include <iostream>
#include <deque>
#include <algorithm>

// Custom comparator
struct CustomComparator {
    int targetValue;

    CustomComparator(int value) : targetValue(value) {}

    bool operator()(int element) const {
        return element == targetValue;
    }
};

int main() {
    std::deque myDeque = {1, 2, 3, 4, 5};

    int valueToFind = 3;
    CustomComparator comp(valueToFind);

    auto it = std::find_if(myDeque.begin(), myDeque.end(), comp);

    if (it != myDeque.end()) {
        std::cout << "Element found: " << *it << std::endl;
    } else {
        std::cout << "Element not found" << std::endl;
    }

    return 0;
}