Qeti / POData

     * 

     * @return AbstractExpression

     */

    private function _parseLogicalOr()

    {

        $this->_recurseEnter();

        $left = $this->_parseLogicalAnd();

        while ($this->_tokenIdentifierIs(ODataConstants::KEYWORD_OR)) {

            $logicalOpToken = clone $this->_getCurrentToken();

            $this->_lexer->nextToken();

            $right = $this->_parseLogicalAnd();

            FunctionDescription::verifyLogicalOpArguments($logicalOpToken, $left, $right);

            $left = new LogicalExpression(

                $left, $right, ExpressionType::OR_LOGICAL

            );

        }

        $this->_recurseLeave();

        return $left;

    }

    /**

     * Parse logical and (and).

     * 

     * @return AbstractExpression

     */

    private function _parseLogicalAnd()

    {

        $this->_recurseEnter();

        $left = $this->_parseComparison();

        while ($this->_tokenIdentifierIs(ODataConstants::KEYWORD_AND)) {

            $logicalOpToken = clone $this->_getCurrentToken();

            $this->_lexer->nextToken();

            $right = $this->_parseComparison();

            FunctionDescription::verifyLogicalOpArguments($logicalOpToken, $left, $right);

            $left = new LogicalExpression($left, $right, ExpressionType::AND_LOGICAL );

        }

        $this->_recurseLeave();

        return $left;

    }

    /**

     * Parse comparison operation (eq, ne, gt, ge, lt, le)