src/ArrayIntersections.php
protected function isNoResultMask($mask) {
    foreach ($this->noResultMasks as $noresultMask) {
      if ($mask === $noresultMask) {
        return TRUE; // @codeCoverageIgnore
      }
      if (($mask & $noresultMask) === $noresultMask) {
        $this->noResultMasks[] = $mask;
        return TRUE;
      }
    }
    return FALSE;
  }
protected function isNoResultMask($mask) {
    foreach ($this->noResultMasks as $noresultMask) {
      if ($mask === $noresultMask) {
        return TRUE; // @codeCoverageIgnore
      }
      if (($mask & $noresultMask) === $noresultMask) {
        $this->noResultMasks[] = $mask;
        return TRUE;
      }
    }
    return FALSE;
  }
protected function isNoResultMask ( $ mask ) { foreach ( $ this -> noResultMasks as $ noresultMask ) { if ( $ mask === $ noresultMask ) { return TRUE ; // @codeCoverageIgnore } if ( ( $ mask & $ noresultMask ) === $ noresultMask ) { $ this -> noResultMasks [ ] = $ mask ; return TRUE ; } } return FALSE ; }
Try to determine if this mask will result in no intersections based on
previously generated masks.

@param string $mask
The mask to check.

@return boolean
TRUE if this mask would result in an empty intersection, FALSE if not or
if not known.
Try to determine if this mask will result in no intersections based on previously generated masks .