libs/vmd/doc/html/BOOST_VMD_IS_TYPE_D.html

   1 <html>
   2 <head>
   3 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
   4 <title>Macro BOOST_VMD_IS_TYPE_D</title>
   5 <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css">
   6 <meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
   7 <link rel="home" href="index.html" title="Chapter&#160;1.&#160;The Variadic Macro Data Library 1.9">
   8 <link rel="up" href="header/boost/vmd/is_type_hpp.html" title="Header &lt;boost/vmd/is_type.hpp&gt;">
   9 <link rel="prev" href="BOOST_VMD_IS_TYPE.html" title="Macro BOOST_VMD_IS_TYPE">
  10 <link rel="next" href="header/boost/vmd/is_unary_hpp.html" title="Header &lt;boost/vmd/is_unary.hpp&gt;">
  11 </head>
  12 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
  13 <table cellpadding="2" width="100%"><tr>
  14 <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td>
  15 <td align="center"><a href="../../../../index.html">Home</a></td>
  16 <td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td>
  17 <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
  18 <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
  19 <td align="center"><a href="../../../../more/index.htm">More</a></td>
  20 </tr></table>
  21 <hr>
  22 <div class="spirit-nav">
  23 <a accesskey="p" href="BOOST_VMD_IS_TYPE.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="header/boost/vmd/is_type_hpp.html"><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="header/boost/vmd/is_unary_hpp.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
  24 </div>
  25 <div class="refentry">
  26 <a name="BOOST_VMD_IS_TYPE_D"></a><div class="titlepage"></div>
  27 <div class="refnamediv">
  28 <h2><span class="refentrytitle">Macro BOOST_VMD_IS_TYPE_D</span></h2>
  29 <p>BOOST_VMD_IS_TYPE_D &#8212; Tests whether a sequence is a VMD type. Re-entrant version. </p>
  30 </div>
  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="header/boost/vmd/is_type_hpp.html" title="Header &lt;boost/vmd/is_type.hpp&gt;">boost/vmd/is_type.hpp</a>&gt;
  33
  34 </span>BOOST_VMD_IS_TYPE_D(d, sequence)</pre></div>
  35 <div class="refsect1">
  36 <a name="idm45529680622720"></a><h2>Description</h2>
  37 <p>d = The next available BOOST_PP_WHILE iteration. sequence = a possible VMD type</p>
  38 <p>returns = 1 if the sequence is a VMD type, 0 if it is not.</p>
  39 <p>If the sequence is not a VMD data type this macro could lead to a preprocessor error. This is because the macro uses preprocessor concatenation to determine if the sequence is an identifier once it is determined that the sequence does not start with parentheses. If the data being concatenated would lead to an invalid preprocessor token the compiler can issue a preprocessor error. </p>
  40 </div>
  41 </div>
  42 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
  43 <td align="left"></td>
  44 <td align="right"><div class="copyright-footer">Copyright &#169; 2010-2017 Tropic Software
  45       East Inc</div></td>
  46 </tr></table>
  47 <hr>
  48 <div class="spirit-nav">
  49 <a accesskey="p" href="BOOST_VMD_IS_TYPE.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="header/boost/vmd/is_type_hpp.html"><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="header/boost/vmd/is_unary_hpp.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
  50 </div>
  51 </body>
  52 </html>