Re: [Boost-users] function_traits<> help, ASAP please!

From: Aleksey Gurtovoy (agurtovoy_at_[hidden])
Date: 2004-12-25 16:14:49

Hossein Haeri writes:
> Dear all,
> 
> According to the Boost.Type_Traits I guess that
> function_traits<> is supposed to be of the most docile
> ones. After all it's got a few lines of comment...
> 
> Don't know how, and why, but the following plain-jane
> programme
> 
> #include <iostream>
> #include "boost\type_traits\function_traits.hpp"
> 
> int main()
> {
>   typedef void (*FType) ();
                  ^

Should be

    typedef void (FType) ();

>   typedef 
>     typename 
>       boost::function_traits<FType>
>         ::result_type return_type;
> 
>   cin.get();
>   return 0;
> }
> 
> Gives me the following error under GCC 3.3.1 (which
> I'm sure supports partial template specialisation):

[...]

> 
> Is he right? Is there anything particular I should had
> done, and I've not?

'function_traits' requires you to pass a _function type_, 
which is a different beast from a pointer to a function.

HTH,
--
Aleksey Gurtovoy
MetaCommunications Engineering