mplementation of the macro, using the <span class="bold"><strong>VA_OPT</strong></span> preprocessor construct, is the author's own and reuses code added to the Boost preprocessor library by this author.</p>
<p>... = variadic input, for VC++8 this must be a single parameter</p>
<p>returns = 1 if the input is empty, 0 if it is not</p>
<p>It is recommended to append BOOST_PP_EMPTY() to whatever input is being tested in order to avoid possible warning messages from some compilers about no parameters being pass