lass="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> InputIterator1<span class="special">,</span> <span class="keyword">typename</span> InputIterator2<span class="special">,</span> 
         <span class="keyword">typename</span> BinaryPredicate<span class="special">&gt;</span> 
  <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="keyword">bool</span> 
  <span class="identifier">equal</span><span class="special">(</span><span class="identifier">