[xtext-dev] Xtext does not parse all LL(*) grammars, does it?

[Oleg Bolshakov <viona31@xxxxxxxxx>]

There is a LL(*) grammar from here: www.antlr.org/wiki/display/~admin/LL%28*%29+grammar+analysis

Model:
	(elem=rules_s);

rules_s : 
  rule_e 'X'
  | rule_e 'Y'
 ;
 
rule_e : 'L' rule_e 'R'
  | 'I'
 ;

Xtext posts this error message when generating workflow:
"rule ruleassignment_expression has non-LL(*) decision due to recursive rule invocations reachable from alts 1,2"

What is the reason? Xtext does not parse all LL(*) grammars, does it?