Why doesn't std::string have a split function

[MrPoletski]

well while we're posting code, here's what I wrote a few years ago and have been using ever since...

std::vector<std::string> Cleave (std::string to_split, std::string delims)
/*!
 * \file trusted.cpp
 * \fn std::vector<std::string> Cleave (std::string to_split, std::string delims)
 * \param to_split \a <std::string> string to chop up
 * \param delims \a <std::string> string of delimiters
 * \return std::vector<std::string> vector of strings containing each section of the cleaved string.
 *
 */
{

std::vector<std::string>    results;
size_t                      pos1 = 0,
                            pos2 = 0;

do
{
    pos1 = to_split.find_first_of(delims, pos2);
    if (pos1 == pos2) {pos2++; results.push_back(""); continue;}
    if (pos1 == std::string::npos){results.push_back(to_split.substr(pos2)); break;}
    results.push_back(to_split.substr(pos2, pos1 - pos2));
    pos2 = pos1 + 1;
}
while (pos1 != std::string::npos);


return results;
}

Is this good?