[boost] Re: Re: Request for enable_if.hpp

From: Jonathan D. Turkanis (technews_at_[hidden])
Date: 2003-12-05 16:37:50

"Jaakko Jarvi" <jajarvi_at_[hidden]> wrote in message:
 > Is this what you have in mind?
 >
 > #ifndef BOOST_NO_SFINAE
 >
 >   // real enable_if
 >
 > #else
 >
 >   template<class T> struct enable_if {
 >     BOOST_STATIC_ASSERT(false); // enable_if is known not to work
 >   };
 >
 >   // same for enable_if_c, lazy_enable_if, ...
 >
 > #endif

That's it.

Or BOOST_STATIC_ASSERT(!BOOST_NO_SFINAE), for self-documentation.

Jonathan