[Boost-users] Re:

From: Ben Hutchings (ben.hutchings_at_[hidden])
Date: 2005-01-12 08:57:59

David Abrahams wrote:

>Ben Hutchings wrote:
>
>> Well the first attempt doesn't solve the problem because it requires an
>> extra parameter.  The second attempt solves it but I don't think you're
>> supposed to make use of other templates.
>
>Any solutions is allowable, though that one is not particularly elegant.
>
>> I think the expected solution
>> would be more like this:
>> 
>> 
>>      template<typename T>
>>      struct add_const_ref
>>      {
>>          typename T const & type;
>>      };
>> 
>>      template<typename T>
>>      struct add_const_ref<T &>
>>      {
>>          typename T & type;
>>      };
>
>Actually there's a much more concise solution using the type traits
>library.  That is, after all, the focus of the chapter.
>
Remind me not to talk about books I haven't read in future...

Ben.