How do I use std::transform_iterator in C++11?

Can you explain how to use std::transform_iterator in C++11?

Sure! std::transform_iterator is a part of the C++11 standard library that allows you to create an iterator that applies a transformation function to the elements of another iterator.

Can you give me a code example of how to use it?

Absolutely! Here's a simple example:

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

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    auto transformFunc = [](int x) { return x * x; };
    std::transform_iterator<decltype(transformFunc), std::vector<int>::iterator> it(vec.begin(), transformFunc);
    std::transform_iterator<decltype(transformFunc), std::vector<int>::iterator> end(vec.end(), transformFunc);

    for (; it != end; ++it) {
        std::cout << *it << " ";
    }
    return 0;
}

This will output the squares of the numbers in the vector.

What are some common use cases for std::transform_iterator?

Common use cases include transforming data while iterating, such as applying a function to each element in a collection without modifying the original data.