tree 91b52363cb0eb5cd34d9b0457222f762c77745ea
parent e70a1db5b010896df640910a45dfd38d02c02834
author Marcel van Lohuizen <mpvl@golang.org> 1617870391 +0200
committer Marcel van Lohuizen <mpvl@golang.org> 1617899558 +0000

cue: support optional field lookup in LookupPath

This is done by allowing Selectors to be converted
to an optional form (if they aren't already).

It also supports the use of the Selectors AnyIndex and
AnyString for getting `T` for  `[string]: T` and `[...T]`.

This also allows deprecating Elem and Template, which
will be done in a separate CL.

Change-Id: I6074382f12259c3dd87557471d80f82720a84779
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/9347
Reviewed-by: CUE cueckoo <cueckoo@gmail.com>
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>