[jira] [Commented] (COUCHDB-2511) Add IS_OLD_RECORD macro to couch_db.hrl

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COUCHDB-2511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14959203#comment-14959203 ] 

ASF subversion and git services commented on COUCHDB-2511:
----------------------------------------------------------

Commit b5e7e54faba5bc06ebd76cd64b0dd5e2c1d06f0c in couchdb-couch's branch refs/heads/master from [~paul.joseph.davis]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb-couch.git;h=b5e7e54 ]

Add IS_OLD_RECORD macro

This can be used in guards to detect if a state variable needs to be
upgraded. An example of it's use might be:

    handle_call(Msg, From, St) when ?IS_OLD_RECORD(St, #st{}) ->
        handle_call(Msg, From, upgrade_state(St));

This is useful for upgrading any of our various gen behaviors that
aren't properly supervised.

This closes #23

COUCHDB-2511

Signed-off-by: Alexander Shorin <kx...@apache.org>


> Add IS_OLD_RECORD macro to couch_db.hrl
> ---------------------------------------
>
>                 Key: COUCHDB-2511
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-2511
>             Project: CouchDB
>          Issue Type: Improvement
>      Security Level: public(Regular issues) 
>          Components: Database Core
>            Reporter: Paul Joseph Davis
>
> This is useful for detecting upgrade in our various un-supervised processes.



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