Allow when in action

[bogaertb]

It would be good to be able to define an action when the value of a certain leaf is set to a (set of) specific value(s). For example: in case we want to reset specific HW components one might think to define a reset action, however certain components (identified by a HW class) might not be supporting a reset. A possible implementation would be that the device returns an error in this case. To me it looks cleaner if YANG would support this by allowing a when clause for the action RPC definition.

[immibis]

Good idea.

[sunseawq]

Support.

[schoenw]

Sounds not too complicated but needs more thought.

[kwatsen]

workaround: put action inside a dummy container with a "when" statement

[mbj4668]

I support this. It is likely an omission.