ceph/src/boost/libs/preprocessor/doc/data/tuples.html

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   8     <h4>Tuples</h4>
   9     <div> A <i>tuple</i> is a simple comma-separated list of elements inside
  10       parenthesis.&nbsp; For example, </div>
  11     <div class="code"> (<i>a</i>, <i>b</i>, <i>c</i>) </div>
  12     <div> ...is a <i>tuple</i> of <i>3</i> elements--<i>a</i>, <i>b</i>, and
  13       <i>c</i>.<br>
  14       <br>
  15       A <i>tuple </i>cannot be empty. The notation '()' as a <i>tuple </i>is
  16       a single element <i>tuple </i>of size 1, where the element is empty. </div>
  17     <div> <i>Tuples</i> are fast and easy to use.&nbsp; With variadic macro
  18       support it is not necessary to know the size of a <i>tuple; </i>without
  19       variadic macro support&nbsp;all access to <i>tuples</i> requires
  20       knowledge of its size. Use a <i>tuple </i>instead of an <i>array</i> if
  21       your compiler supports variadic macros, since a <i>tuple </i>has all of
  22       the functionality as an <i>array </i>and is easier syntactically to use.
  23       The only functionality an <i>array </i>has which a <i>tuple </i>does
  24       not have is that an <i>array </i>can be empty whereas a <i>tuple </i>cannot
  25       be empty.</div>
  26     <div> Elements of a <i>tuple</i> can be extracted with <b>BOOST_PP_TUPLE_ELEM</b>.
  27     </div>
  28     <h4>Primitives</h4>
  29     <ul>
  30       <li><a href="../ref/tuple_elem.html">BOOST_PP_TUPLE_ELEM</a></li>
  31     </ul>
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  33     <div style="margin-left: 0px;"> <i>© Copyright <a href="http://www.housemarque.com"
  34           target="_top">Housemarque Oy</a> 2002</i> <br>
  35       <i>© Copyright Paul Mensonides 2002</i> </div>
  36     <div style="margin-left: 0px;">
  37       <p><small>Distributed under the Boost Software License, Version 1.0. (See
  38           accompanying file <a href="../../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a>
  39           or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</small></p>
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