::</span><span class="identifier">tom_rational</span></code>.
          It acts as a thin wrapper around <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">rational</span><span class="special">&lt;</span><span class="identifier">tom_int</span><span class="special">&gt;</span></code> to provide a rational number type that
          is a drop-in replacement for the native C++ number types, but with unlimited
          precision.
        </