3eab1272   
   From: daniel.kruegler@googlemail.com   
      
   Am 04.02.2012 20:31, schrieb GH:   
   > Hi all, is there a way to statically reference the return type of a   
   > function or an expression? To make myself clear, take the iomanip   
   > std::setw for example. The standard explicitly leaves the return type   
   > of std::setw implementation dependent. Suppose I want to know and   
   > reference the type of std::setw(8) (e g create a variable of that   
   > type), is there anyway to reference that type without going to the   
   > headers and using the implementation dependent type such as std::_Setw   
   > in g++?   
      
   In C++11 you can use decltype to realize that:   
      
   #include    
      
   typedef decltype(std::setw(8)) setw_type;   
      
   or more generally:   
      
   #include    
   #include    
      
   typedef decltype(std::setw(std::declval())) setw_type;   
      
   HTH & Greetings from Bremen,   
      
   Daniel Krügler   
      
      
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