public function ComparisonExpression()
{
$peek = $this->_lexer->glimpse();
$leftExpr = $this->ArithmeticExpression();
$operator = $this->ComparisonOperator();
if ($this->_isNextAllAnySome()) {
$rightExpr = $this->QuantifiedExpression();
} else {
$rightExpr = $this->ArithmeticExpression();
}
return new AST\ComparisonExpression($leftExpr, $operator, $rightExpr);
}