="identifier">N</span><span class="special">&gt;</span> <span class="identifier">T</span> <span class="identifier">constant_my_constant</span><span class="special">{...}</span></code>,
        then you cannot define <code class="computeroutput"><span class="identifier">constant_my_constant</span></code>
        until you add the temporary <code class="computeroutput"><span class="identifier">BOOST_DEFINE_MATH_CONSTANT</span><span class="special">(</span><span class="identifier">my_constant</span><span class