Re: [Boost-users] enable_if and multiple partial specializations

Subject: Re: [Boost-users] enable_if and multiple partial specializations
From: Gennadiy Rozental (rogeeff_at_[hidden])
Date: 2011-04-08 11:05:45

Joel Falcou <joel.falcou <at> lri.fr> writes:

> template<class T>
> struct M<T,typename boost::enable_if< boost::is_enum<T>  >::type>  {
>        static void foo() { std::cout<<  "enum"<<  std::endl; }
>   };
> 
> template<typename T>
>   struct M<T, typename boost::enable_if_c< boost::is_scalar<T>::value && 
> !boost::is_enum<T>::value  >::type>  {
>        static void foo() { std::cout<<  "scalar"<<  std::endl; }
>   };
> 

This will not really work for me. This was just an artificial example. In
reality I have generic header which defines the template, another common header
which defines some not very specific specialization and multiple (number changes
as project grows) headers where I define more specific specializations. I can't
"NOT" all the specific conditions in "scalar" level specialization - It's just
not maintainable.

Any other options?

Thank you,
Gennadiy