Bug in boost/algorithm/string

[dix75@…]

I have bug in function is_lower. Kubuntu 10.10 x32 gcc 4.5

std::string str ="hello world";
std::cout << str << " " << (boost::all(str,boost::is_lower()) ? "is " : "is not") << " written in the lower case" << std::endl;

hello world is not written in the lower case
?????

[Steven Watanabe]

You're asking whether every character in the string "hello world" is a lower case character. A space is not a lower case character, thus the result is false.