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boolean [message #1044291]

Thu, 18 April 2013 18:21

T Pot

Messages: 2
Registered: April 2013

Junior Member

I have the following rule:

Else_Statement:
{Else_Statement}
(hasElse ?= (ELSE else_statement=Statement_List)?)?
;

Terminal ELSE:
'ELSE'
;

The line (hasElse ?= (ELSE else_statement=Statement_List)?)?
gives the following error:

Multiple markers at this line:
- missing ')' at else_statement
- mismatched input ')' expecting ';'

How come this is not allowed?

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Re: boolean [message #1044386 is a reply to message #1044291]

Thu, 18 April 2013 21:18

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

the placement is false. you have to add it before a terminal/datatype rule

Else_Statement:
{Else_Statement}
( (hasElse ?=ELSE else_statement=Statement_List)?)?
;

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

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