Flow\Parser::parseCompareExpression PHP Метод

    protected function parseCompareExpression()
    {
        static $operators = array('!==', '===', '==', '!=', '<>', '<', '>', '>=', '<=');
        $line = $this->stream->getCurrentToken()->getLine();
        $expr = $this->parseConcatExpression();
        $ops = array();
        while ($this->stream->test(Token::OPERATOR, $operators)) {
            $ops[] = array($this->stream->next()->getValue(), $this->parseAddExpression());
        }
        if (empty($ops)) {
            return $expr;
        }
        return new Expression\CompareExpression($expr, $ops, $line);
    }