"special">&lt;</span><span class="keyword">typename</span> Type<span class="special">&gt;</span> 
  <span class="keyword">struct</span> <a class="link" href="map/on_codomain_mo_idp41587472.html" title="Struct template on_codomain_model&lt;Type, true, false&gt;">on_codomain_model</a><span class="special">&lt;</span><span class="identifier">Type</span><span class="special">,</span> <span class="keyword">true</span><span class="special">,</span> <span class="keyword">false</span><span class="special">&gt;</spa