Effective-C++_Item_23.cpp

class WebBrowser {
public:
  // ...
  void clearCache();
  void clearHistory();
  void removeCookies();
  // ...
};

class WebBrowser {
public:
  // ...
  void clearEverything(); // calls clearCache, clearHistory, removeCookies
  // ...
};

void clearBrowser(WebBrowser& wb) {
  wb.clearCache();
  wb.clearHistory();
  wb.removeCookies();
}

namespace WebBrowserStuff {
 class WebBrowser { ... };
 void clearBrowser(WebBrowser& wb);
}

// header "webbrowser.h" — header for class WebBrowser itself 
// as well as "core" WebBrowser-related functionality 
namespace WebBrowserStuff { 
  class WebBrowser { ... }; 
  // "core" related functionality, 
  // e.g. non-member functions almost all clients need 
} 
// header "webbrowserbookmarks.h" 
namespace WebBrowserStuff { 
  // bookmark-related convenience functions
}
// header "webbrowsercookies.h" 
namespace WebBrowserStuff { 
  // cookie-related convenience functions
}