public function evalStatic()

in src/parser/xhpast/api/XHPASTNode.php [30:106]
75 lines of code
20 McCabe index (conditional complexity)

  public function evalStatic() {
    switch ($this->getTypeName()) {
      case 'n_STATEMENT':
        return $this->getChildByIndex(0)->evalStatic();
        break;
      case 'n_STRING_SCALAR':
        return (string)$this->getStringLiteralValue();
      case 'n_NUMERIC_SCALAR':
        $value = $this->getSemanticString();
        if (preg_match('/^0x/i', $value)) {
          // Hex
          $value = base_convert(substr($value, 2), 16, 10);
        } else if (preg_match('/^0\d+$/i', $value)) {
          // Octal
          $value = base_convert(substr($value, 1),  8, 10);
        }
        return +$value;
      case 'n_SYMBOL_NAME':
        $value = $this->getSemanticString();
        if ($value == 'INF') {
          return INF;
        }
        switch (strtolower($value)) {
          case 'true':
            return true;
          case 'false':
            return false;
          case 'null':
            return null;
          default:
            throw new Exception(pht('Unrecognized symbol name.'));
        }
        break;
      case 'n_UNARY_PREFIX_EXPRESSION':
        $operator = $this->getChildOfType(0, 'n_OPERATOR');
        $operand = $this->getChildByIndex(1);
        switch ($operator->getSemanticString()) {
          case '-':
            return -$operand->evalStatic();
            break;
          case '+':
            return $operand->evalStatic();
            break;
          default:
            throw new Exception(
              pht('Unexpected operator in static expression.'));
        }
        break;
      case 'n_ARRAY_LITERAL':
        $result = array();
        $values = $this->getChildOfType(0, 'n_ARRAY_VALUE_LIST');
        foreach ($values->getChildren() as $child) {
          $key = $child->getChildByIndex(0);
          $val = $child->getChildByIndex(1);
          if ($key->getTypeName() == 'n_EMPTY') {
            $result[] = $val->evalStatic();
          } else {
            $result[$key->evalStatic()] = $val->evalStatic();
          }
        }
        return $result;
      case 'n_CONCATENATION_LIST':
        $result = '';
        foreach ($this->getChildren() as $child) {
          if ($child->getTypeName() == 'n_OPERATOR') {
            continue;
          }
          $result .= $child->evalStatic();
        }
        return $result;
      default:
        throw new Exception(
          pht(
            'Unexpected node during static evaluation, of type: %s',
            $this->getTypeName()));
    }
  }