tree 677293e66fa0955373e142ce4af65aaaa4bbabf5
parent 7334a13a7a52858187e7e9e8028baea7c25b3644
author Marcel van Lohuizen <mpvl@golang.org> 1573341264 +0100
committer Marcel van Lohuizen <mpvl@golang.org> 1573383322 +0000

cue/scanner: allow $ as a letter in identifies

This brings CUE identifiers in line with JavaScript,
and more importantly, JSON style.

It is common in JSON to have identifiers with a $.
With the restriction that string labels can no longer
be referenced, and with the elimination of quoted
identifiers, this has become a bit awkward.

Also, unlike Go, CUE cannot enforce a certain
capitalization style as this is often enforced by the
given APIs. Allowing `$` in addition to `_` gives users
a bit more flexibility in using identifiers that stand out
from other conventions used within an API.

Change-Id: If6253d1e353729aad07ccd665ccd04018ab2ccce
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/3982
Reviewed-by: Jonathan Amsterdam <jba@google.com>