Tiny Brainfuck interpreter

bf.cpp

#include <array>
#include <fstream>
#include <iostream>

using namespace std;

const size_t memory_size = 1024;

template <typename It>
It& skip(It&& it, char from, char to) {
    while (*++it != to) if (*it == from) skip(it, from, to);
    return it;
}

int main(int argc, char *argv[]) {
    ifstream fs(argv[1]);
    string program((istreambuf_iterator<char>(fs)), istreambuf_iterator<char>());
    auto ip = program.begin();

    array<char, memory_size> memory{ };
    auto data = memory.begin();

    while (ip != program.end()) {
        switch (*ip++) {
        case '>': data++; break;
        case '<': data--; break;
        case '+': (*data)++; break;
        case '-': (*data)--; break;
        case '.': cout << *data; break;
        case ',': cin >> *data; break;
        case '[': if (!*data) skip(ip, '[', ']'); break;
        case ']': if (*data) ip = skip(reverse_iterator<string::iterator>(ip), ']', '[').base(); break;
        }
    }
}

Pass brainfuck source file as argument to the program: bf <file>.