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[SVN r15198]
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Paul Mensonides
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<html>
<head>
<title>arrays.html</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
<script language="javascript" type="text/javascript" src="../scripts.js"></script>
</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 the 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>
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>
</body>
</html>

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<html>
<head>
<title>lists.html</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
<script language="javascript" type="text/javascript" src="../scripts.js"></script>
</head>
<body>
<h4>Lists</h4>
<div>
A <i>list</i> is a simple cons-style list with a head and a tail.&nbsp;
The head of a <i>list</i> is an element,
and the tail is either another <i>list</i> or <b>BOOST_PP_NIL</b>.
For example,
</div>
<div class="code">
(<i>a</i>, (<i>b</i>, (<i>c</i>, <b>BOOST_PP_NIL</b>)))
</div>
<div>
...is a <i>list</i> of <i>3</i> elements--<i>a</i>, <i>b</i>, and <i>c</i>.
</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>
Elements of a <i>list</i> can be extracted with
<b>BOOST_PP_LIST_FIRST</b> and <b>BOOST_PP_LIST_REST</b>.&nbsp;
</div>
<h4>Primitives</h4>
<ul>
<li><a href="../ref/list_first.html">BOOST_PP_LIST_FIRST</a></li>
<li><a href="../ref/list_rest.html">BOOST_PP_LIST_REST</a></li>
<li><a href="../ref/nil.html">BOOST_PP_NIL</a></li>
</ul>
</body>
</html>

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<html>
<head>
<title>tuples.html</title>
<link rel="stylesheet" type="text/css" href="../styles.css">
<script language="javascript" type="text/javascript" src="../scripts.js"></script>
</head>
<body>
<h4>Tuples</h4>
<div>
A <i>tuple</i> is a simple comma-separated list of elements inside parenthesis.&nbsp;
For example,
</div>
<div class="code">
(<i>a</i>, <i>b</i>, <i>c</i>)
</div>
<div>
...is a <i>tuple</i> of <i>3</i> elements--<i>a</i>, <i>b</i>, and <i>c</i>.
</div>
<div>
<i>Tuples</i> are fast and easy to use.&nbsp;
However, all access to <i>tuples</i> requires knowledge of its size.
</div>
<div>
Elements of a <i>tuple</i> can be extracted with
<b>BOOST_PP_TUPLE_ELEM</b>.
</div>
<h4>Primitives</h4>
<ul>
<li><a href="../ref/tuple_elem.html">BOOST_PP_TUPLE_ELEM</a></li>
</ul>
</body>
</html>