Re: [Boost-users] Comparing is_pointer with true_

Subject: Re: [Boost-users] Comparing is_pointer with true_
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-01-19 12:27:17

AMDG

jean-louis.a.leroy_at_[hidden] wrote:
>> I'm quite sure that I follow.  Do you mean that you have a template like 
>> this:
>> template<bool B>
>> void f(mpl::bool_<B>);
>>     
>
> Nearly. It's more like this:
>
> template<class WritePointers, ...>
> struct WriteAttributes {
>   template<class Attribute>
>   void operator ()(Attribute a) const
>   {
>     typedef ... attribute_type;
>     write(is_convertible<is_pointer<attribute_type>, WritePointers>(), ...);
>   }
>   template<...>
>   void write(mpl::false_, ...); // non-pointer pass
>   template<...>
>   void write(mpl::true_, ...); // pointer pass
>   // ...
> };
>   

I see.  How about

boost::mpl::equal_to<is_pointer<attribute_type>, WritePointers>

In Christ,
Steven Watanabe