How to test if a string contains any digits in C++

Question

I want to know if a string has any digits, or if there are no digits. Is there a function that easily does this?

Answer 1

boost::regex re("[0-9]");
const std::string src = "test 123 test";
boost::match_results what; 
bool search_result = 
   boost::regex_search(src.begin(), src.end(), what, re, boost::match_default);