[Review] SE-0144: Allow Single Dollar Sign as a Valid Identifier

  * What is your evaluation of the proposal?

-1. I would much rather see it either as an operator, or more likely as some other special syntax/meaning in Swift.

  * Is the problem being addressed significant enough to warrant a change to Swift?

No. Providing backwards compatibility with a single library that used an undocumented feature is not a significant enough reason.

  * Does this proposal fit well with the feel and direction of Swift?


  * How much effort did you put into your review? A glance, a quick reading, or an in-depth study?

I read the proposal and previous reviews.