tree c05a910332bd61fd2f4b924cff35441489235d68
parent 503fecdd6eb356c0795db09bb8a0335634b22852
author Marcel van Lohuizen <mpvl@golang.org> 1574453051 -0800
committer Marcel van Lohuizen <mpvl@golang.org> 1574454006 +0000

cue: don't validate optional fields

Errors are always allowed in optional fields (it means the field
must remain unspecified).

Change-Id: I314f15773dabd4e26d5e0f3e0ae1f0dfd9d32173
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/4060
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>