span><span class="special">&lt;</span><span class="keyword">typename</span> F<span class="special">&gt;</span> <a class="link" href="specify_nothing.html" title="Class specify_nothing">specify_nothing</a> <a name="idm45572792071840-bb"></a><span class="identifier">except</span><span class="special">(</span><span class="identifier">F</span> <span class="keyword">const</span> <span class="special">&amp;</span> f<span class="special">)</span><span class="special">;</span></pre>Allow to specify exception guaran