Implicit switch exceptions (was: [switch] Status of implementation of switch expression)

[John Rose]

On Feb 27, 2018, at 2:33 PM, Brian Goetz <Brian.Goetz at Oracle.COM> wrote:
> 
> Scala uses MatchError (extends RuntimeException) for this.

I think we could just steal that.  And maybe class
SwitchCaseNotFoundError extends MatchError,
or is that too much splitting?

— John