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Re: [netmod] can a leaf of type "empty" have a "default" value?

"Reshad Rahman (rrahman)" <rrahman@cisco.com> Fri, 17 May 2019 19:59 UTC

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From: "Reshad Rahman (rrahman)" <rrahman@cisco.com>
To: Kent Watsen <kent+ietf@watsen.net>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] can a leaf of type "empty" have a "default" value?
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Date: Fri, 17 May 2019 19:59:41 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/wd3jX1tJy2JX185PBASmuLZcIfQ>
Subject: Re: [netmod] can a leaf of type "empty" have a "default" value?
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Hi Kent,

From https://tools.ietf.org/html/rfc7950#section-9.11
An empty type cannot have a default value.

Regards,
Reshad.

From: netmod <netmod-bounces@ietf.org> on behalf of Kent Watsen <kent+ietf@watsen.net>
Date: Friday, May 17, 2019 at 3:53 PM
To: "netmod@ietf.org" <netmod@ietf.org>
Subject: [netmod] can a leaf of type "empty" have a "default" value?


A leaf with type "empty" is often times used to represent a boolean: present == set, not present == not set.  Is there a way in YANG to specify that the "empty" type leaf is "set" by default?  Perhaps like this:

    leaf flag {
        type empty;
        default "";
    }

Kent // contributor

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