andsalves / doctrine-elastic

     *          | InputParameter | CaseExpression

     */

    public function ArithmeticPrimary() {

        if ($this->lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS)) {

            $this->match(Lexer::T_OPEN_PARENTHESIS);

            $expr = $this->SimpleArithmeticExpression();

            $this->match(Lexer::T_CLOSE_PARENTHESIS);

            return new AST\ParenthesisExpression($expr);

        }

        switch ($this->lexer->lookahead['type']) {

            case Lexer::T_COALESCE:

        $peek = $this->lexer->glimpse();

        // Subselect

        if ($this->lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS) && $peek['type'] === Lexer::T_SELECT) {

            $this->match(Lexer::T_OPEN_PARENTHESIS);

            $expr = $this->Subselect();

            $this->match(Lexer::T_CLOSE_PARENTHESIS);

            return $expr;

        }

        // ResultVariable (string)

        if ($this->lexer->isNextToken(Lexer::T_IDENTIFIER) &&