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Boost library as in https://sourceforge.net/projects/boost/files/boost/1.57.0/

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<html> <head> <title>arrays.html</title> <link rel="stylesheet" type="text/css" href="../styles.css"> </head> <body> <h4>Arrays</h4> <div> An <i>array</i> is a data structure consisting of a two-element <i>tuple</i>.&nbsp; The first element is the number of elements in the <i>array</i>.&nbsp; The second element is another <i>tuple</i> of the elements in the <i>array</i>.&nbsp; For example, </div> <div class="code"> (<i>3</i>, (<i>a</i>, <i>b</i>, <i>c</i>)) </div> <div> ...is an <i>array</i> of <i>3</i> elements--<i>a</i>, <i>b</i>, and <i>c</i>. </div> <div> The primary strength of <i>arrays</i> is that they store their own size.&nbsp; Because of this, access to elements does not require the size.&nbsp; It only requires that an element exists at a certain index. </div> <div> This allows macro parameters to be variable in size and allows data states to change size without the user explicitly keeping track of the size independently.</div> <div>With variadic macro support a <i>tuple </i>has all of the functionality as an <i>array</i>, knows its own size, and is easier syntactically to use. Because of that an <i>array</i> should be used, as opposed to a <i>tuple</i>, only if your compiler does not support variadic macros.<br> <br> Elements of an <i>array</i> can be extracted with <b>BOOST_PP_ARRAY_ELEM</b>, an <i>array's</i> size can be extracted with <b>BOOST_PP_ARRAY_SIZE</b>, and an <i>array</i> can be converted to the more primitive <i>tuple</i> data structure with <b>BOOST_PP_ARRAY_DATA</b>. </div> <h4>Primitives</h4> <ul> <li><a href="../ref/array_data.html">BOOST_PP_ARRAY_DATA</a></li> <li><a href="../ref/array_elem.html">BOOST_PP_ARRAY_ELEM</a></li> <li><a href="../ref/array_size.html">BOOST_PP_ARRAY_SIZE</a></li> </ul> <hr size="1"> <div style="margin-left: 0px;"> <i>� Copyright <a href="http://www.housemarque.com" target="_top">Housemarque Oy</a> 2002</i> <br> <i>� Copyright Paul Mensonides 2002</i> </div> <div style="margin-left: 0px;"> <p><small>Distributed under the Boost Software License, Version 1.0. (See accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p> </div> </body> </html>