Being a *template* metaprogramming framework, the MPL concentrates on
getting one thing done well and leaves most of the clearly
preprocessor-related tasks to the corresponding specialized
libraries [PRE]_, [Ve03]_. But whether we like it or not, macros play
an important role on today's C++ metaprogramming, and some of
the useful MPL-level functionality cannot be implemented
without leaking its preprocessor-dependent implementation
nature into the library's public interface.
`The Boost Preprocessor Metaprogramming library`__
__ http://www.boost.org/libs/preprocessor/doc/index.html
.. copyright:: Copyright � 2001-2009 Aleksey Gurtovoy and David Abrahams
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)