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| <h2><span class="refentrytitle">Macro BOOST_VARIANT_ENUM_PARAMS</span></h2> |
| <p>BOOST_VARIANT_ENUM_PARAMS — Enumerate parameters for use with |
| <code class="computeroutput"><a class="link" href="boost/variant.html" title="Class template variant">variant</a></code>.</p> |
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| <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
| <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="variant/reference.html#header.boost.variant.variant_fwd_hpp" title="Header <boost/variant/variant_fwd.hpp>">boost/variant/variant_fwd.hpp</a>> |
| |
| </span>BOOST_VARIANT_ENUM_PARAMS(param)</pre></div> |
| <div class="refsect1"> |
| <a name="id3074711"></a><h2>Description</h2> |
| <p>Expands to a comma-separated sequence of length |
| <code class="computeroutput"><a class="link" href="BOOST_VARIANT_LIMIT_TYPES.html" title="Macro BOOST_VARIANT_LIMIT_TYPES">BOOST_VARIANT_LIMIT_TYPES</a></code>, where |
| each element in the sequence consists of the concatenation of |
| <span class="emphasis"><em>param</em></span> with its zero-based index into the |
| sequence. That is, |
| <code class="computeroutput">param ## 0, param ## 1, ..., param ## BOOST_VARIANT_LIMIT_TYPES - 1</code>.</p> |
| <p><span class="bold"><strong>Rationale</strong></span>: This macro greatly |
| simplifies for the user the process of declaring |
| <code class="computeroutput"><a class="link" href="boost/variant.html" title="Class template variant">variant</a></code> types |
| in function templates or explicit partial specializations of class |
| templates, as shown in the |
| <a class="link" href="variant/tutorial.html#variant.tutorial.preprocessor" title="Preprocessor macros">tutorial</a>.</p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2002, 2003 Eric Friedman, Itay Maman<p>Distributed under the Boost Software License, Version 1.0. |
| (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at |
| <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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