array_elem.html 1.6 KB

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  3. <title>BOOST_PP_ARRAY_ELEM</title>
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  8. The <b>BOOST_PP_ARRAY_ELEM</b> macro extracts an element from a <i>array</i>.
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  10. <h4>Usage</h4>
  11. <div class="code">
  12. <b>BOOST_PP_ARRAY_ELEM</b>(<i>i</i>, <i>array</i>)
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  14. <h4>Arguments</h4>
  15. <dl>
  16. <dt>i</dt>
  17. <dd>
  18. The zero-based index into the <i>array</i> of the element to be extracted.&nbsp;
  19. </dd>
  20. <dt>array</dt>
  21. <dd>
  22. The <i>array</i> from which an element is to be extracted.&nbsp;
  23. This <i>array</i> must contain at least <i>i</i> + <i>1</i> elements.
  24. </dd>
  25. </dl>
  26. <h4>Requirements</h4>
  27. <div>
  28. <b>Header:</b> &nbsp;<a href="../headers/array/elem.html">&lt;boost/preprocessor/array/elem.hpp&gt;</a>
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  30. <h4>Sample Code</h4>
  31. <div><pre>
  32. #include &lt;<a href="../headers/array/elem.html">boost/preprocessor/array/elem.hpp</a>&gt;
  33. #define ARRAY (4, (a, b, c, d))
  34. <a href="array_elem.html">BOOST_PP_ARRAY_ELEM</a>(0, ARRAY) // expands to a
  35. <a href="array_elem.html">BOOST_PP_ARRAY_ELEM</a>(3, ARRAY) // expands to d
  36. </pre></div>
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  39. <i>© Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i>
  40. </br><i>© Copyright Paul Mensonides 2002</i>
  41. </div>
  42. <div style="margin-left: 0px;">
  43. <p><small>Distributed under the Boost Software License, Version 1.0. (See
  44. accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
  45. copy at <a href=
  46. "http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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