| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Struct template is_mpi_op</title> |
| <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> |
| <link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> |
| <link rel="up" href="../../mpi/reference.html#header.boost.mpi.operations_hpp" title="Header <boost/mpi/operations.hpp>"> |
| <link rel="prev" href="bitwise_xor.html" title="Struct template bitwise_xor"> |
| <link rel="next" href="packed_iarchive.html" title="Class packed_iarchive"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table cellpadding="2" width="100%"><tr> |
| <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> |
| <td align="center"><a href="../../../../index.html">Home</a></td> |
| <td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> |
| <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> |
| <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> |
| <td align="center"><a href="../../../../more/index.htm">More</a></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="bitwise_xor.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../mpi/reference.html#header.boost.mpi.operations_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="packed_iarchive.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="refentry"> |
| <a name="boost.mpi.is_mpi_op"></a><div class="titlepage"></div> |
| <div class="refnamediv"> |
| <h2><span class="refentrytitle">Struct template is_mpi_op</span></h2> |
| <p>boost::mpi::is_mpi_op — Determine if a function object has an associated <code class="computeroutput">MPI_Op</code>. </p> |
| </div> |
| <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.operations_hpp" title="Header <boost/mpi/operations.hpp>">boost/mpi/operations.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Op<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_op.html" title="Struct template is_mpi_op">is_mpi_op</a> <span class="special">{</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id2060468"></a><h2>Description</h2> |
| <p>This trait determines if a function object type <code class="computeroutput">Op</code>, when used with argument type <code class="computeroutput">T</code>, has an associated <code class="computeroutput">MPI_Op</code>. If so, <code class="computeroutput">is_mpi_op<Op,T></code> will derive from <code class="computeroutput">mpl::false_</code> and will contain a static member function <code class="computeroutput">op</code> that takes no arguments but returns the associated <code class="computeroutput">MPI_Op</code> value. For instance, <code class="computeroutput">is_mpi_op<std::plus<int></code>,int>op() returns <code class="computeroutput">MPI_SUM</code>.</p> |
| <p>Users may specialize <code class="computeroutput">is_mpi_op</code> for any other class templates that map onto operations that have <code class="computeroutput">MPI_Op</code> equivalences, such as bitwise OR, logical and, or maximum. However, users are encouraged to use the standard function objects in the <code class="computeroutput">functional</code> and <code class="computeroutput">boost/mpi/operations.hpp</code> headers whenever possible. For function objects that are class templates with a single template parameter, it may be easier to specialize <code class="computeroutput">is_builtin_mpi_op</code>. </p> |
| </div> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <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"> |
| http://www.boost.org/LICENSE_1_0.txt </a>) |
| </p> |
| </div></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="bitwise_xor.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../mpi/reference.html#header.boost.mpi.operations_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="packed_iarchive.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |
