tree 0cf3c0b6d37a34ff1fab7e355c8bae8945e06024
parent a4dbd6413f37b51ad9504b6a04e9e04c23e856bf
author Paul J. Davis <paul.joseph.davis@gmail.com> 1418415938 -0600
committer Paul J. Davis <paul.joseph.davis@gmail.com> 1418415938 -0600

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.

COUCHDB-2511