conditions.h

// that's the condition interface; A condtion have just to be met
class Condition {                                                                       
public:                                                                                 
        virtual bool isMet(File&) const = 0;                                                  
};                                                                                      
                                                                                        
class FilenameEquals : public Condition                                              
{                                                                                    
    FilenameEquals(string);                                                          
    bool isMet(File&) const;                                                         
};                                                                                    
                                                                                     
class FilenameContains : public Condition                                            
{                                                                                    
    FilenameContains(string);                                                        
    bool isMet(File&) const;                                                         
}; 

gistfile2.txt

vector<Condition>::const_iterator iterator;
for(iterator = this->_conditions.begin();                                        
 iterator != this->_conditions.end(); ++iterator ){                              
                                                                                 
    if (!iterator->isMet(file)){                                                 
        return; // exists if one condition is not met                            
    }                                                                            
}