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- <title>BOOST_PP_REPEAT_z</title>
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- <div style="margin-left: 0px;"> The <b>BOOST_PP_REPEAT_<i>z</i></b> macro
- represents a reentry into the <b>BOOST_PP_REPEAT</b> repetition
- construct. </div>
- <h4>Usage</h4>
- <div class="code"> <b>BOOST_PP_REPEAT_</b> ## <i>z</i>(<i>count</i>, <i>macro</i>,
- <i>data</i>) </div>
- <h4>Arguments</h4>
- <dl>
- <dt>z</dt>
- <dd> The next available <b>BOOST_PP_REPEAT</b> dimension. </dd>
- <dt>count</dt>
- <dd> The number of repetitious calls to <i>macro</i>. Valid values
- range from <i>0</i> to <b>BOOST_PP_LIMIT_REPEAT</b>. </dd>
- <dt>macro</dt>
- <dd> A ternary operation of the form <i>macro</i>(<i>z</i>, <i>n</i>, <i>data</i>).
- This macro is expanded by <b>BOOST_PP_REPEAT</b> with the next
- available repetition depth, the current repetition number, and the
- auxiliary <i>data</i> argument. </dd>
- <dt>data</dt>
- <dd> Auxiliary data passed to <i>macro</i>. </dd>
- </dl>
- <h4>Remarks</h4>
- <div> This macro expands to the sequence:
- <div> <i>macro</i>(<i>z</i>, <i>0</i>, <i>data</i>) <i>macro</i>(<i>z</i>,
- <i>1</i>, <i>data</i>) ... <i>macro</i>(<i>z</i>, <i>count</i> - <i>1</i>,
- <i>data</i>) </div>
- </div>
- <div> At certain times, it may be necessary to perform the concatenation
- with <b>BOOST_PP_CAT</b> rather than the preprocessor token-pasting
- operator. This happens when the <i>z</i> value is a macro
- invocation itself. It needs a delay to allow it to expand. The
- syntax in such a scenario becomes:
- <div> <b>BOOST_PP_CAT</b>(<b>BOOST_PP_REPEAT_</b>, <i>z</i>)(<i>count</i>,
- <i>macro</i>, <i>data</i>) </div>
- </div>
- <h4>See Also</h4>
- <ul>
- <li><a href="cat.html">BOOST_PP_CAT</a></li>
- <li><a href="limit_repeat.html">BOOST_PP_LIMIT_REPEAT</a></li>
- <li><a href="repeat.html">BOOST_PP_REPEAT</a></li>
- <li><a href="repeat_z_macros.html"><span style="color: gray;">Macros with
- Z re-entrancy forms</span></a></li>
- </ul>
- <h4>Requirements</h4>
- <div> <b>Header:</b> <a href="../headers/repetition/repeat.html"><boost/preprocessor/repetition/repeat.hpp></a>
- </div>
- <h4>Sample Code</h4>
- <div>
- <pre>#include <<a href="../headers/arithmetic/inc.html">boost/preprocessor/arithmetic/inc.hpp</a>>
- #include <<a href="../headers/punctuation/comma_if.html">boost/preprocessor/punctuation/comma_if.hpp</a>>
- #include <<a href="../headers/repetition/repeat.html">boost/preprocessor/repetition/repeat.hpp</a>>
- #define TEXT(z, n, text) <a href="comma_if.html">BOOST_PP_COMMA_IF</a>(n) text
- #define TEMPLATE(z, n, _) \
- <a href="comma_if.html">BOOST_PP_COMMA_IF</a>(n) \
- template< \
- <a href="repeat_z.html">BOOST_PP_REPEAT_</a> ## z( \
- <a href="inc.html">BOOST_PP_INC</a>(n), \
- TEXT, class \
- ) \
- > class T ## n \
- /**/
- <a href="repeat.html">BOOST_PP_REPEAT</a>(3, TEMPLATE, nil)
- /*
- expands to:
- template<class> class T0,
- template<class, class> class T1,
- template<class, class, class> class T2
- */
- </pre></div>
- <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<br>
- </i><i>© Copyright Edward Diener 2014</i><br>
- </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>
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