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+<html>
+  <head>
+    <meta content="text/html; charset=windows-1252" http-equiv="content-type">
+    <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.<br>
+      <br>
+      An <i>array </i>can be empty and have no elements. An empty array has a
+      0 size. The notation for an empty array is '(0,())'.<br>
+      <br>
+      <span style="font-style: italic;"> </span></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. The only advantage an <i>array </i>has over a <i>tuple
+      </i>is that an <i>array </i>can be empty while a <i>tuple </i>always
+      has at least one element and therefore can never have a size of 0.<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>