ss="identifier">MultiPass</span><span class="special">&gt;</span>
        <span class="keyword">static</span> <span class="keyword">bool</span> <span class="identifier">input_is_valid</span><span class="special">(</span><span class="identifier">MultiPass</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">mp</span><span class="special">,</span> <span class="identifier">value_type</span> <span class="keyword">const</span><span class="special">&amp;</span> <spa