(C++) Hello Boost.Xpressive

 

Hello Boost.Xpressive is an extension of Hello World. Like Hello World, Hello Boost.Xpressive is a simple console application. Hello Boost.Xpressive, however, also requires the Boost.Xpressive library.

 

The base code of Hello Boost.Xpressive is:

 

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#include <iostream> #include <boost/xpressive/xpressive.hpp> ///Example adapted from http://www.boost.org/doc/libs/1_54_0/doc/html/xpressive/user_s_guide.html int main() {   const std::string hello( "hello world!" );   const boost::xpressive::sregex rex = boost::xpressive::sregex::compile( "(\\w+) (\\w+)!" );   boost::xpressive::smatch what;   if( boost::xpressive::regex_match( hello, what, rex ) )   {     std::cout << what[0] << '\n'; // whole match     std::cout << what[1] << '\n'; // first capture     std::cout << what[2] << '\n'; // second capture   } }

 

Here are some detailed examples of Hello Boost.Xpressive, depending on IDE and operating system:

 

• 'Hello Boost.Xpressive' using Qt Creator under Cygwin
• 'Hello Boost.Xpressive' using Qt Creator under Lubuntu
• 'Hello Boost.Xpressive' using Qt Creator under Lubuntu, crosscompile to Windows