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<h2><span class="refentrytitle">Macro BOOST_VMD_ASSERT_IS_ARRAY_D</span></h2>
<p>BOOST_VMD_ASSERT_IS_ARRAY_D &#8212; Asserts that the sequence is a Boost PP array. Re-entrant version. </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/vmd/assert_is_array_hpp.html" title="Header &lt;boost/vmd/assert_is_array.hpp&gt;">boost/vmd/assert_is_array.hpp</a>&gt;

</span>BOOST_VMD_ASSERT_IS_ARRAY_D(d, sequence)</pre></div>
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<a name="idm45529681065264"></a><h2>Description</h2>
<p>The macro checks that the sequence is a Boost PP array. If it is not a Boost PP array, it forces a compiler error.</p>
<p>The macro normally checks for a Boost PP array only in debug mode. However an end-user can force the macro to check or not check by defining the macro BOOST_VMD_ASSERT_DATA to 1 or 0 respectively.</p>
<p>d = The next available BOOST_PP_WHILE iteration. sequence = a possible Boost PP sequence.</p>
<p>returns = Normally the macro returns nothing.        If the sequence is a Boost PP array, nothing is 
       output.

       For VC++, because there is no sure way of forcing  
       a compiler error from within a macro without producing
       output, if the sequence is not a Boost PP array the 
       macro forces a compiler error by outputting invalid C++.

       For all other compilers a compiler error is forced 
       without producing output if the sequence is not a 
       Boost PP array.
 </p>
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