ess of whether <code>NDEBUG</code> is defined.</p>
</div>
<div class="paragraph">
<p><code>boost::assertion_failed_msg</code> is declared in <code>&lt;boost/assert.hpp&gt;</code> as</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code>namespace boost
{
    void assertion_failed_msg(char const * expr, char const * msg,
        char const * function, char const * file, long line);
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>but it is never defined. The user is e