Is it possible to retrieve blank strings with boost::tokenizer?

From: Sean Shubin (sean.shubin_at_[hidden])
Date: 2002-09-04 13:03:59

For example, using the code:

string line = "\taaa\t\tbbb\t";
typedef tokenizer<char_separator<char> > tok;
char_separator<char> sep("\t");
tok tokens(line, sep);
for(tok::iterator i = tokens.begin();i!=tokens.end();++i) {
  cout << "\t\"" << *i << "\"" << endl;
}

I get this output:
        "aaa"
        "bbb"

I want to get this output:
        ""
        "aaa"
        ""
        "bbb"
        ""