From: kaba@nowhere.com   
      
   11.8.2012 9:14, Francis Glassborow kirjoitti:   
   > On 10/08/2012 22:35, Kaba wrote:   
   >> 10.8.2012 21:19, Francis Glassborow kirjoitti:   
   >>> On 09/08/2012 19:51, Kaba wrote:   
   >>>> Would it make sense to generalize the implicit return-type   
   >>>> deduction of the lambda functions to all functions? Motivation:   
   >>>> reading the Boost.Proto documentation and seeing something like   
   >>>> this:   
   >>>>   
   >>> But the problem is that only a function declaration is needed in   
   >>> order to call a function. How will the caller know what the return   
   >>> type is?   
   >   
   > template g(T t);   
   >   
   > int main(){   
   >      g(f());  // how is the compiler to deal with this?   
   > // ...   
   > }   
      
   I see. Then one would need to add the requirement that a function with   
   the implicit-return type has to be defined before its return-type is   
   queried. In this case, emit "error: Unable to deduce the return-type of   
   the function template  g(T t), where T = ".   
   Lambdas are able to avoid this problem because they can never be   
   forward-declared.   
      
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