src/lint/linter/ArcanistScriptAndRegexLinter.php [315:389]:
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        $this->regex = $value;
        return;
    }

    return parent::setLinterConfigurationValue($key, $value);
  }

/* -(  Parsing Output  )----------------------------------------------------- */

  /**
   * Get the line and character of the message from the regex match.
   *
   * @param dict Captured groups from regex.
   * @return pair<int|null,int|null> Line and character of the message.
   *
   * @task parse
   */
  private function getMatchLineAndChar(array $match, $path) {
    if (!empty($match['offset'])) {
      list($line, $char) = $this->getEngine()->getLineAndCharFromOffset(
        idx($match, 'file', $path),
        $match['offset']);
      return array($line + 1, $char + 1);
    }

    $line = idx($match, 'line');
    if (strlen($line)) {
      $line = (int)$line;
      if (!$line) {
        $line = 1;
      }
    } else {
      $line = null;
    }

    $char = idx($match, 'char');
    if ($char) {
      $char = (int)$char;
    } else {
      $char = null;
    }

    return array($line, $char);
  }

  /**
   * Map the regex matching groups to a message severity. We look for either
   * a nonempty severity name group like 'error', or a group called 'severity'
   * with a valid name.
   *
   * @param dict Captured groups from regex.
   * @return const  @{class:ArcanistLintSeverity} constant.
   *
   * @task parse
   */
  private function getMatchSeverity(array $match) {
    $map = array(
      'error'    => ArcanistLintSeverity::SEVERITY_ERROR,
      'warning'  => ArcanistLintSeverity::SEVERITY_WARNING,
      'autofix'  => ArcanistLintSeverity::SEVERITY_AUTOFIX,
      'advice'   => ArcanistLintSeverity::SEVERITY_ADVICE,
      'disabled' => ArcanistLintSeverity::SEVERITY_DISABLED,
    );

    $severity_name = strtolower(idx($match, 'severity'));

    foreach ($map as $name => $severity) {
      if (!empty($match[$name])) {
        return $severity;
      } else if ($severity_name == $name) {
        return $severity;
      }
    }

    return ArcanistLintSeverity::SEVERITY_ERROR;
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src/lint/linter/UberSingleScriptAndRegexLinter.php [305:379]:
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        $this->regex = $value;
        return;
    }

    return parent::setLinterConfigurationValue($key, $value);
  }

/* -(  Parsing Output  )----------------------------------------------------- */

  /**
   * Get the line and character of the message from the regex match.
   *
   * @param dict Captured groups from regex.
   * @return pair<int|null,int|null> Line and character of the message.
   *
   * @task parse
   */
  private function getMatchLineAndChar(array $match, $path) {
    if (!empty($match['offset'])) {
      list($line, $char) = $this->getEngine()->getLineAndCharFromOffset(
        idx($match, 'file', $path),
        $match['offset']);
      return array($line + 1, $char + 1);
    }

    $line = idx($match, 'line');
    if (strlen($line)) {
      $line = (int)$line;
      if (!$line) {
        $line = 1;
      }
    } else {
      $line = null;
    }

    $char = idx($match, 'char');
    if ($char) {
      $char = (int)$char;
    } else {
      $char = null;
    }

    return array($line, $char);
  }

  /**
   * Map the regex matching groups to a message severity. We look for either
   * a nonempty severity name group like 'error', or a group called 'severity'
   * with a valid name.
   *
   * @param dict Captured groups from regex.
   * @return const  @{class:ArcanistLintSeverity} constant.
   *
   * @task parse
   */
  private function getMatchSeverity(array $match) {
    $map = array(
      'error'    => ArcanistLintSeverity::SEVERITY_ERROR,
      'warning'  => ArcanistLintSeverity::SEVERITY_WARNING,
      'autofix'  => ArcanistLintSeverity::SEVERITY_AUTOFIX,
      'advice'   => ArcanistLintSeverity::SEVERITY_ADVICE,
      'disabled' => ArcanistLintSeverity::SEVERITY_DISABLED,
    );

    $severity_name = strtolower(idx($match, 'severity'));

    foreach ($map as $name => $severity) {
      if (!empty($match[$name])) {
        return $severity;
      } else if ($severity_name == $name) {
        return $severity;
      }
    }

    return ArcanistLintSeverity::SEVERITY_ERROR;
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