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| 26 | <a name="BOOST_VARIANT_ENUM_PARAMS"></a><div class="titlepage"></div> |
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| 27 | <div class="refnamediv"> |
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| 28 | <h2><span class="refentrytitle">Macro BOOST_VARIANT_ENUM_PARAMS</span></h2> |
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| 29 | <p>BOOST_VARIANT_ENUM_PARAMS — <p>Enumerate parameters for use with |
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| 30 | <code class="computeroutput"><a href="boost/variant.html" title="Class template variant">variant</a></code>.</p></p> |
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| 31 | </div> |
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| 32 | <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
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| 33 | <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis">BOOST_VARIANT_ENUM_PARAMS(param)</pre></div> |
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| 34 | <div class="refsect1" lang="en"> |
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| 35 | <a name="id2832432"></a><h2>Description</h2> |
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| 36 | <p>Expands to a comma-separated sequence of length |
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| 37 | <code class="computeroutput"><a href="BOOST_VARIANT_LIMIT_TYPES.html" title="Macro BOOST_VARIANT_LIMIT_TYPES">BOOST_VARIANT_LIMIT_TYPES</a></code>, where |
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| 38 | each element in the sequence consists of the concatenation of |
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| 39 | <span class="emphasis"><em>param</em></span> with its zero-based index into the |
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| 40 | sequence. That is, |
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| 41 | <code class="computeroutput">param ## 0, param ## 1, ..., param ## BOOST_VARIANT_LIMIT_TYPES - 1</code>.</p> |
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| 42 | <p><span class="bold"><strong>Rationale</strong></span>: This macro greatly |
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| 43 | simplifies for the user the process of declaring |
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| 44 | <code class="computeroutput"><a href="boost/variant.html" title="Class template variant">variant</a></code> types |
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| 45 | in function templates or explicit partial specializations of class |
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| 46 | templates, as shown in the |
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| 47 | <a href="variant/tutorial.html#variant.tutorial.preprocessor" title="Preprocessor macros">tutorial</a>.</p> |
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