:</span><span class="identifier">numeric_limits</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">digits</span> <span class="special">-</span> <span class="number">2</span><span class="special">);</span>
   <span class="comment">// Call bracket_and_solve_root to find the solution, note that this is a rising function:</span>
   <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span