How Can I Use a Regex on the Reverse of a string?

I want to use a regex on the reverse of a string.

I can do the following but all my sub_matches are reversed:

string foo("lorem ipsum");
match_results<string::reverse_iterator> sm;

if (regex_match(foo.rbegin(), foo.rend(), sm, regex("(\\w+)\\s+(\\w+)"))) {
    cout << sm[1] << ' ' << sm[2] << endl;
}
else {
    cout << "bad\n";
}

[Live example]

What I want is to get out:

ipsum lorem

Is there any provision for this beyond reversing the strings after they're matched like this:

string first(sm[1]);
string second(sm[2]);

reverse(first.begin(), first.end());
reverse(second.begin(), second.end());

cout << first << ' ' << second << endl;