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<h2><span class="refentrytitle">Macro BOOST_TTI_HAS_DATA</span></h2>
<p>BOOST_TTI_HAS_DATA &#8212; Expands to a metafunction which tests whether member data or static member data with a particular name and type exists. </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: &lt;<a class="link" href="header/boost/tti/has_data_hpp.html" title="Header &lt;boost/tti/has_data.hpp&gt;">boost/tti/has_data.hpp</a>&gt;

</span>BOOST_TTI_HAS_DATA(name)</pre></div>
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<a name="idm45456560534432"></a><h2>Description</h2>
<p>name = the name of the inner member.</p>
<p>generates a metafunction called "has_data_name" where 'name' is the macro parameter.       template&lt;class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE&gt;
      struct has_data_name
        {
        static const value = unspecified;
        typedef mpl::bool_&lt;true-or-false&gt; type;
        };

      The metafunction types and return:

        BOOST_TTI_TP_T    = the enclosing type in which to look for our 'name'

        BOOST_TTI_TP_TYPE = The type of the member data or static member.

        returns  = 'value' is true if the 'name' exists, with the correct data type,
                   otherwise 'value' is false.
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