tree 347d0383ffd6c2e3f7b6c6b0105bbb3cffcd4e7a
parent d9af603eb379f0587b2e4e73fa57464aa716bde6
author Marcel van Lohuizen <mpvl@golang.org> 1619778914 +0200
committer Marcel van Lohuizen <mpvl@golang.org> 1619814897 +0000

cue: prepare API implementation for structure sharing

The CUE API relies on the Parent field to reflect the
path down which the user descended to obtain the
value. With structure sharing, this means this parent
field may vary by context.

This now adds another field to Value, which keeps
track of a differing parent Value chain. The field
only needs to be set in the case of actual structure
sharing.

Change-Id: Ia03de7d249ce72e72104740ce649827e7b07f2ad
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/9572
Reviewed-by: CUE cueckoo <cueckoo@gmail.com>
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Paul Jolly <paul@myitcv.org.uk>