scription</a>
        </h6>
<p>
          The enumeration validity_failure_type enumerates the possible reasons for
          which a geometry may be found as invalid by the is_valid algorithm. Besides
          the values that indicate invalidity, there is an additional value (no_failure)
          that indicates validity.
        </p>
<h6>
<a name="geometry.reference.enumerations.validity_failure_type.h1"></a>
          <span class="phrase"><a name="geometry.reference.enumerations.validity_failure_type.sy