[jira] [Commented] (METRON-658) Invalid Stellar Predicate Statement

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/METRON-658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15848773#comment-15848773 ] 

ASF GitHub Bot commented on METRON-658:
---------------------------------------

Github user cestella commented on the issue:

    https://github.com/apache/incubator-metron/pull/430
  
    +1 by inspection, good contribution.  I like the refactoring of the grammar too.  Stellar is getting cleaner and cleaner with every contribution like this.


> Invalid Stellar Predicate Statement
> -----------------------------------
>
>                 Key: METRON-658
>                 URL: https://issues.apache.org/jira/browse/METRON-658
>             Project: Metron
>          Issue Type: Bug
>            Reporter: Josh Meyer
>              Labels: grammar, stellar
>
> Currently there seems to be an issue in the way Stellar defines predicate statements in its grammar. This may not necessarily be limited to predicate statements, but currently this is where the issue is showing itself. For example, the following expressions should be valid, but each of them fails during parsing.
> {code}
> ('grok' not in 'foobar') == true
> 'grok' not in ('foobar' == true)
> 'grok' not in 'foobar' == true
> {code}



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