XtextAntlrGeneratorFragment... that was the problem, sorry, my fault
On 2 June 2012 19:53, Oleg Bolshakov <[email protected]> wrote:
> That does work in plain antlr with "backtrack = true", but doesn't work in
> Xtext not regarding backtrack option.
> For setting up backtrack I used this code in workflow:
> // generates a more lightweight Antlr parser and lexer tailored for
> content assist
> fragment = parser.antlr.XtextAntlrUiGeneratorFragment {
> options = {
> backtrack = true
> }
> }
> What's wrong?
>
>
> On 2 June 2012 16:16, Sebastian Zarnekow <[email protected]>wrote:
>
>> The error message is from Antlr and has nothing to do with Xtext specific
>> functionality. I assume you'd get that from a plain Antlr grammar, too.
>>
>> Regards,
>> Sebastian
>>
>> Sent from my iPhone
>>
>> On 02.06.2012, at 14:05, Oleg Bolshakov <[email protected]> wrote:
>>
>> sorry, "rule rulerules_s" instead of "rule ruleassignment_expression"
>>
>> On 2 June 2012 16:04, Oleg Bolshakov <[email protected]> wrote:
>>
>>> There is a LL(*) grammar from here:
>>> www.antlr.org/wiki/display/~admin/LL%28*%29+grammar+analysis<http://www.antlr.org/wiki/display/%7Eadmin/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?
>>>
>>
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>
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