Algo-Web / 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).