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Decision can match input such as "'}'" using multiple alternatives [message #677518]

Wed, 08 June 2011 18:04

Elhamlaoui Mahmoud

Messages: 268
Registered: March 2010

Senior Member

Hi,

I have alittle problem with the factoring in my grammar that i couldnt figure out :

i have the flowwing grammar :
Quote:

P returns P:
{P}
'{{ '
('id' id=String0)?
(attr+=AddAttr)?
'}'
(c=C)?
'}}';

AddAttr returns AddAttr:
{AddAttr}
('rId' rId=Int0)?
('value' value=String0)?
;
Int0 returns type::Int:
STRING
;

String0 returns type::String:
STRING
;

Any ideas where the error
Quote:

Decision can match input such as "'}'" using multiple alternatives

comes from
thanks

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Re: Decision can match input such as "'}'" using multiple alternatives [message #677545 is a reply to message #677518]

Wed, 08 June 2011 19:17

Christian Dietrich

Messages: 14716
Registered: July 2009

Senior Member

Hi,

the problem is

(attr+=AddAttr)?

vs.

AddAttr returns AddAttr:
{AddAttr}
('rId' rId=Int0)?
('value' value=String0)?
;

this is too much optionality for the parser
changing to

attr+=AddAttr

should solve the problem

~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Decision can match input such as "'}'" using multiple alternatives [message #677741 is a reply to message #677545]

Thu, 09 June 2011 09:14

Elhamlaoui Mahmoud

Messages: 268
Registered: March 2010

Senior Member

thanks Christian, problem solved

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