[netmod] choice statements and trim vs explicit default handling

["Sterne, Jason (Nokia - CA/Ottawa)" <[e-mail]>]

Hi all,

When a server operates in 'trim' mode (rfc6243), setting a leaf to its default value removes it from the config (i.e. it is indistinguishable from the case where that leaf was never configured or the case where that leaf was deleted/removed).

(A)
Does setting a leaf in one case of a choice to its default value (in a 'trim' mode server) cause leafs in other cases to be implicitly deleted ?  I assume not.

For example:

choice foo {
  case aa {
    leaf some-bool { type Boolean; default "false"; }
  {
  case bb {
    leaf some-num { type int32; }
  }
}

If some-num is currently set to 50, and then an edit-config sets some-bool to "false", does that clear the some-num leaf ?
(i.e. does it select case aa ?)

RFC 7950 says: "the creation of a node from one case implicitly deletes all nodes from all other cases".
RFC 6243 section 2.2.3 describes that a leaf set to default (in a trim server) doesn't exist.

(B)
Now how about if the server operates in 'explicit' mode ?  Does setting some-bool to "false" clear some-num ?  I assume it does (but it just seems a little funny that the behavior on this changes between trim and explicit servers).


Regards,
Jason