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  3. <title>facilities/check_empty.hpp</title>
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  8. The <b>facilities/check_empty.hpp</b> header defines a variadic macro for the C++20 level that checks if its data is empty or not.
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  10. <h4>Usage</h4>
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  12. #include <b>&lt;boost/preprocessor/facilities/check_empty.hpp&gt;</b>
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  14. <h4>Contents</h4>
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  16. <li><a href="../../ref/check_empty.html">BOOST_PP_CHECK_EMPTY</a> <a href="../../topics/variadic_macros.html#VNotation" target="_self">(v)</a></li>
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  20. <i></i><i>© Copyright Edward Diener 2019</i>
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  23. <p><small>Distributed under the Boost Software License, Version 1.0. (See
  24. accompanying file <a href="../../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
  25. copy at <a href=
  26. "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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