d>Amortized constant time</td><td></td><td>Value of <code>n</code>.</td><td></td></tr>
<tr><td><code>typename n::next</code></td><td>Amortized constant time</td><td><code>n::value_type</code> supports an increment operation; <code>n::value</code> is incrementable</td><td>Increment operation</td><td><code>n::next::value == n::value + 1</code> </td></tr>
<tr><td><code>typename n::prior</code></td><td>Amortized constant time</td><td><code>n::value_type</code> supports an decrement operation; <code>n::value</co