From: francis.glassborow@btinternet.com   
      
   On 05/10/2013 12:41, fmatthew5876 wrote:   
   >> What about:   
   >>   
   >> enum Color { // How I hate spellings that are specific to   
   >>               // to one side of the Atlantic   
   >>     red, blue, green, count };   
   >> constexpr unsigned colors{(unsigned) count};   
   >   
   > That still has a lot of the problems I mentioned.   
   >   
   > void printScreen(Color c);   
   >   
   > printScreen(count); //<- Must handle this invalid input at runtime   
   >   
   > switch(c) {   
   > case red:   
   > case blue:   
   > case green:   
   > }   
   >   
   > Using compiler switch warnings, it will complain that there is no case   
   > for color.   
   >   
   >   
      
   add something such as   
      
   case count:   
   default: throw "not a color";   
      
   Satisfies the compiler and handles all invalid colors   
      
      
      
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