[jira] [Commented] (PIG-2597) Move grunt from javacc to ANTRL

["Kyungho Jeon (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-2597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14019544#comment-14019544 ] 

Kyungho Jeon commented on PIG-2597:
-----------------------------------

Sorry that I hasn't been quite active. :( I think I am confused with the above comment by [~daijy] regarding Macro. I find a test case in the workaround (PIG-3359). Would it be good enough for me to design based on the test case, or is there any other cases that the test case does not cover?

> Move grunt from javacc to ANTRL
> -------------------------------
>
>                 Key: PIG-2597
>                 URL: https://issues.apache.org/jira/browse/PIG-2597
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Jonathan Coveney
>            Assignee: Daniel Dai
>              Labels: gsoc2014
>         Attachments: pig02.diff
>
>
> Currently, the parser for queries is in ANTLR, but Grunt is still javacc. The parser is very difficult to work with, and next to impossible to understand or modify. ANTLR provides a much cleaner, more standard way to generate parsers/lexers/ASTs/etc, and moving from javacc to Grunt would be huge as we continue to add features to Pig.
> This is a candidate project for Google summer of code 2014. More information about the program can be found at https://cwiki.apache.org/confluence/display/PIG/GSoc2014



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