tree 4e42ddd089e7802aff9acac8853df0b0bb2f3482
parent 9934915f950528c1d8ae353fd14b74d577bb45dd
author Marcel van Lohuizen <mpvl@golang.org> 1564833236 +0200
committer Marcel van Lohuizen <mpvl@golang.org> 1564834735 +0000

cue: treat cycle errors as normal incomplete errors

Reference cycles are no different from any other
non-concrete values that can still be resolved.
Reflect this accordingly.

Not doing so can cause unfication to fail in the
validation step done after it.

Add an option to explicitly disallow cycles in
Validate. This may be useful if applications
want to ensure there are no cycles but otherwise
don't care about the precense of non-concrete
values.

Change-Id: Ib718081067e230d8eabd37b9169e292cefec8536
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/2708
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>