Альтернативы boost::algorithm::join

string join(string* strings, int stringslen, string separator)
{
    string output;
    for (int i = 0;i < stringslen - 1;i++)
    {
        output += strings[i];
        output += separator;
    }
    output += strings[stringslen - 1];
    return output;
}

template <template <class ...> class Container, class ... Args>
std::string join(const Container<std::string, Args...>& strings, const std::string& separator) {
    typedef Container<std::string, Args...> ctype;
    std::string output;
    if (!strings.empty()) {
        for (typename ctype::const_iterator i = strings.begin(); i != std::prev(strings.end()); i++) {
            output += *i;
            output += separator;
        }
        output += *std::prev(strings.end());
    }
    return output;
}

template<typename It>
std::string join(It begin, It end, const std::string& sep) {
    std::ostringstream stream;
    std::copy(begin, end, std::ostream_iterator<std::string>{stream, sep.c_str()});
    auto output = stream.str();
    output.erase(output.end() - sep.length(), output.end());
    return output;
}