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https://issues.apache.org/jira/browse/PIG-1618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xuefu Zhang updated PIG-1618:
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Attachment: NewParser-7.patch
Updated the patch (#6) based on some of the feedback.
Line number/column number is not asserted because of Antlr's recovery feature.
The numbers are shown in the error messages, but it's not available without
turning the recovery off, which requires some additional work. Will provide the
capability later.
> Switch to new parser generator technology
> -----------------------------------------
>
> Key: PIG-1618
> URL: https://issues.apache.org/jira/browse/PIG-1618
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.8.0
> Reporter: Alan Gates
> Assignee: Xuefu Zhang
> Fix For: 0.9.0
>
> Attachments: antlr-3.2.jar, javadoc.patch, NewParser-1.patch,
> NewParser-2.patch, NewParser-3.patch, NewParser-3.patch, NewParser-4.patch,
> NewParser-5.patch, NewParser-6.patch, NewParser-7.patch
>
>
> There are many bugs in Pig related to the parser, particularly to bad error
> messages. After review of Java CC we feel these will be difficult to address
> using that tool. Also, the .jjt files used by JavaCC are hard to understand
> and maintain.
> ANTLR is being reviewed as the most likely choice to move to, but other
> parsers will be reviewed as well.
> This JIRA will act as an umbrella issue for other parser issues.
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