From: Tore.Halvorsen@googlemail.com   
      
   On Friday, 4 October 2013 19:23:10 UTC+2, Öö Tiib  wrote:   
   > For simple tests use some online service like: http://ideone.com/   
      
   Thank you for that link!   
      
   > 'std::string' has number of implicit conversion constructors and   
   > copy constructor so above code must be is ambiguous. Implicit   
   > conversion constructors together with implicit conversion operators   
   > often result with confused compiler (and confused people too).   
      
   Ah, yes, I see.   
      
   Since foo can be converted into the different types that std::string   
   takes as parameters to its convertion constructor, there is no clear   
   path from foo to std::string...   
      
      
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