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<h4>Introduction</h4>
<div> The Boost Preprocessing library is a library of macros, with
support for preprocessor metaprogramming. The library supports
both C++ and C compilation. It does not depend on any other Boost
libraries and therefore may be used as a standalone library.<br>
</div>
<div>The library requires that the compiler supports <a
href="topics/variadic_macros.html">variadic macros</a>. Since
variadic macros are a C99 or C++11 feature the library ostensibly
requires at least compilation at those C or C++ standard levels. A
number of compilers support variadic macros at a lower level, so
it still may be possible using the library at that compilation
level, as long as strict C++98/C++03 compliance is not enforced.<br>
</div>
<div> An excerpt from <i>C++ Template Metaprogramming: Concepts,
Tools, and Techniques from Boost and Beyond</i> by Dave Abrahams
and Aleksey Gurtovoy has been made <a
href="AppendixA-AnIntroductiontoPreprocessorMetaprogramming.html"
target="_top"><font color="blue"><b><u><i>available</i></u></b></font></a>.
This excerpt contains a basic introduction to the Preprocessor
library and preprocessor metaprogramming which may help users new
to the library and users interested in seeing some of the
facilities offered by the library. </div>
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