template<class InputIterator, class ForwardIterator>
constexpr InputIterator
find_first_of(InputIterator first1, InputIterator last1,
		      ForwardIterator first2, ForwardIterator last2);

template <class ExecutionPolicy, class ForwardIterator1, class ForwardIterator2>
ForwardIterator1
find_first_of(ExecutionPolicy&& exec, ForwardIterator1 first, ForwardIterator1 last,
              ForwardIterator2 s_first, ForwardIterator2 s_last);

template<class InputIterator, class ForwardIterator,
	     class BinaryPredicate>
constexpr InputIterator
find_first_of(InputIterator first1, InputIterator last1,
              ForwardIterator first2, ForwardIterator last2,
              BinaryPredicate comp);

template <class ExecutionPolicy, class ForwardIterator1,
          class ForwardIterator2, class BinaryPredicate>
ForwardIterator1 find_first_of(ExecutionPolicy&& exec, ForwardIterator1 first, ForwardIterator1 last,
                               ForwardIterator2 s_first, ForwardIterator2 s_last, BinaryPredicate pred)

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>

int main()
{
    auto f = {'!', '_', '1'};
    std::string str = "hel1o_world!";
    auto find_it = std::find_first_of(std::begin(str), std::end(str),
                                      std::begin(f), std::end(f));
    if (find_it != std::end(str))
    {
        std::cout << std::string_view(find_it, std::end(str)) << std::endl;
    }
    else
    {
        std::cout << "No matches." << std::endl;
    }
    return 0;
}

1o_world!

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
int main()
{
    auto f = {'!', '_'};

    auto pred = [](auto i_el, auto f_el) {
        return i_el == f_el;
    };

    std::string str = "hello_world!";
    auto find_it = std::find_first_of(std::begin(str), std::end(str),
                                      std::begin(f), std::end(f), pred);
    if (find_it != std::end(str))
    {
        std::cout << std::string_view(find_it, std::end(str)) << std::endl;
    }
    else
    {
        std::cout << "No matches." << std::endl;
    }
    return 0;
}

_world!