r">int_</span></code>
          which has <code class="computeroutput"><span class="keyword">int</span></code>, or <code class="computeroutput"><span class="identifier">ascii</span><span class="special">::</span><span class="identifier">char_</span></code> which has <code class="computeroutput"><span class="keyword">char</span></code>.
          For primitive parsers apply the normal C++ convertibility rules: you can
          use any C++ type to receive the parsed value as long as the attribute type
      