Extractor to recognise the string str.cons function.
Extractor to recognise the string str.cons function.
      
    
      Extractor to recognise the string str.empty function.
Extractor to recognise the string str.empty function.
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
    
      
    
      
      
    
      
      
    
      
      
    
      
    
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      (Since version ) see corresponding Javadoc for more information.