alid
          (with strategy)</a>, <a class="indexterm" href="reference/algorithms/is_valid/is_valid_1.html">is_valid</a>, <a class="indexterm" href="reference/algorithms/is_valid/is_valid_3_with_failure_value_and_strategy.html">is_valid
          (with failure value and strategy)</a>, <a class="indexterm" href="reference/algorithms/is_valid/is_valid_2_with_failure_value.html">is_valid
          (with failure value)</a>, <a class="indexterm" href="reference/algorithms/is_valid/is_valid_3_with_message_and_s