split string into words

#include <string>
#include <vector>
#include <iostream>
#include <assert.h>

std::vector<std::string> split(const std::string &s)
{
    typedef std::string::size_type pos_t;
    pos_t beg_pos, end_pos;

    const std::string delims("\t ;,.");
    std::vector<std::string> ret;

    beg_pos = s.find_first_not_of(delims);

    while(beg_pos != std::string::npos)
    {
        end_pos = s.find_first_of(delims, beg_pos);

        if(std::string::npos == end_pos)
        {
            end_pos = s.length();
        }

        ret.push_back(s.substr(beg_pos, end_pos-beg_pos));
        beg_pos = s.find_first_not_of(delims, end_pos);
    }
    return ret;
}

int _tmain(int argc, _TCHAR* argv[])
{
    std::string s("\tbo1.bo2  bobo3 a");
    std::vector<std::string> v = split(s);
    assert(v.size() == 4);
    assert(v[0] == "bo1");
    assert(v[1] == "bo2");
    assert(v[2] == "bobo3");
    assert(v[3] == "a");
    return 0;
}