Recognise $ as a valid variable name

[davenewza]

It would be handy if $ could be recognised as a valid variable name. It would mean expressions such as $.name would be possible. The idea is that it would synonymous to this.name in certain contexts. As far as I can see, $ isn't referenced in the CEL specification for anything else and I don't see any strict definition for naming of variables. Thoughts?

[TristonianJones]

Hi @davenewza, the naming of variables must adhere to valid identifier characters: [_a-zA-Z]([_a-zA-Z0-9])*

We did recently introduce support for backticks for accessing fields with invalid identifier characters (also reserved words) which you may find useful.

[davenewza]

Thanks - all makes sense