regex_replace_with_lambda

gistfile1.txt

template<typename T, typename F>
std::basic_string<T> regex_replace_with_lambda(
    const std::basic_string<T>& str,
    const std::basic_regex<T>&  re,
    F                      f)
{
    typedef std::basic_string<T> StrT;

    auto ret = StrT();

    auto it = std::regex_token_iterator<typename StrT::const_iterator>(
        std::begin(str),
        std::end(str),
        re);

    auto last = std::regex_token_iterator<typename StrT::const_iterator>();

    auto cur = std::begin(str);
    while (it != last) {
        auto before = StrT(cur, it->first);
        if (!before.empty()) {
            ret += before;
        }
        ret += f(it->str());
        cur += before.length() + it->length();
        ++it;
    }
    if (cur != std::end(str)) {
        ret += StrT(cur, std::end(str));
    }

    return ret;
}