string parser c++

Splitting a string to a vector of words is very common task in text processing field. And I try to write  several lines of C++ code to deal this problem.

size_t split(const std::string &line, std::vector<std::string> &wordVec, const char sep)

{

    wordVec.clear();

    std::string::size_type pos = 0, prev_pos = 0;

    while (std::string::npos != (pos = line.find_first_of(' ', pos))) {

        wordVec.push_back(line.substr(prev_pos, pos - prev_pos));

        prev_pos = ++pos;

    }

    if(prev_pos < line.size())

    {

        wordVec.push_back(line.substr(prev_pos, pos-prev_pos));

//        std::cout<<"["<

    }

    

    return wordVec.size();

}