The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference
by Nicolai M. Josuttis, Addison-Wesley, 1999
© Copyright Nicolai M. Josuttis 1999
#include <iostream> #include <algorithm> #include <functional> #include <string> #include <cctype> #include "compose.hpp" using namespace std; using namespace boost; int main() { string s("Internationalization"); string sub("Nation"); // search substring case insensitive string::iterator pos; pos = search (s.begin(),s.end(), // string to search in sub.begin(),sub.end(), // substring to search compose_f_gx_hy(equal_to<int>(), // compar. criterion ptr_fun(::toupper), ptr_fun(::toupper))); if (pos != s.end()) { cout << "\"" << sub << "\" is part of \"" << s << "\"" << endl; } }