Re: [yang-doctors] Unsupported schema tree w/ cyclic dependencies + schema node identifier clarification

[Juergen Schoenwaelder <[e-mail]>]

On Sun, Mar 24, 2019 at 04:59:43PM +0000, Ebben Aries wrote:
> > 
> > I view this as a bug in the compiler!
> >
> 
> I agree.  It seems section 9.9 covers some of this to come to the
> conclusion that strict checks as such should not be in order if a
> require-instance statement is not in use however the problem here is a
> bit different in attempting to resolve a schema node that does not exist
> at all due to the deviation (which could fall into the same category I
> suppose)

In the general case, it is desirable that compilers generate warnings
or errors when schema nodes are referenced that have no definition
(regardless of require-instance).  Whether this is a warning of an
error may be context dependent, for example, a typedef with a
reference to something undefined is likely just a warning as long as
the defined type is not used but it becomes an error if the defined
type is used by a leaf or a leaf-list.

In your particular case, the compiler knows that the schema node is
defined and the compiler knows that it got deviated away. Hence, the
compiler can stay silent as long as the typedef is not used.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
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