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| <h2><span class="refentrytitle">Struct template is_mpi_builtin_datatype</span></h2> |
| <p>boost::mpi::is_mpi_builtin_datatype — Type trait that determines if there exists a built-in MPI data type for a given C++ type. </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="../../mpi/reference.html#header.boost.mpi.datatype_hpp" title="Header <boost/mpi/datatype.hpp>">boost/mpi/datatype.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="is_mpi_builtin_datatype.html" title="Struct template is_mpi_builtin_datatype">is_mpi_builtin_datatype</a> <span class="special">{</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id2044101"></a><h2>Description</h2> |
| <p>This type trait determines when there is a direct mapping from a C++ type to an MPI type. For instance, the C++ <code class="computeroutput">int</code> type maps directly to the MPI type <code class="computeroutput">MPI_INT</code>. When there is a direct mapping from the type <code class="computeroutput">T</code> to an MPI type, <code class="computeroutput">is_mpi_builtin_datatype</code> will derive from <code class="computeroutput">mpl::true_</code> and the MPI data type will be accessible via <code class="computeroutput">get_mpi_datatype</code>.</p> |
| <p>In general, users should not need to specialize this trait. However, if you have an additional C++ type that can map directly to only of MPI's built-in types, specialize either this trait or one of the traits corresponding to categories of MPI data types (<code class="computeroutput">is_mpi_integer_datatype</code>, <code class="computeroutput">is_mpi_floating_point_datatype</code>, <code class="computeroutput">is_mpi_logical_datatype</code>, <code class="computeroutput">is_mpi_complex_datatype</code>, or <code class="computeroutput">is_mpi_builtin_datatype</code>). <code class="computeroutput">is_mpi_builtin_datatype</code> derives <code class="computeroutput">mpl::true_</code> if any of the traits corresponding to MPI data type categories derived <code class="computeroutput">mpl::true_</code>. </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor, |
| Matthias Troyer, Trustees of Indiana University<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top"> |
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