replace_all

replace_all.cpp

template <typename T>
std::basic_string<T> replace_all(const std::basic_string<T>& str, const T* from, const T* to)
{
    std::basic_string<T> ret;
    ret.reserve(str.length());

    size_t from_len = 0;
    while (from[from_len]) {
        from_len++;
    }

    size_t start_pos = 0, pos;
    while ((pos = str.find(from, start_pos)) != std::basic_string<T>::npos) {
        ret += str.substr(start_pos, pos - start_pos);
        ret += to;
        pos += from_len;
        start_pos = pos;
    }
    ret += str.substr(start_pos);
    return ret;
}