[boost] Type traits "redefinable" macros

From: John Maddock (John_Maddock_at_[hidden])
Date: 2001-08-28 07:00:58

>A simple technique for supporting external redefinition is to define the
macro
>defaults conditionally:
>
>    #ifndef BOOST_IS_UNION
>    #define BOOST_IS_UNION(T) false
>    #endif

Yes agreed.

>[Of course, all of this can be rather safely ignored, because the number
of
>compilers with the special support is negligibly small.]

Zero :-(   ?

- John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/