PREV INDEX NEXT

Author: Unknown
Subject: Alphanumeric chars
Date: Wednesday, 21 Oct 2020, 19:55:18

The spec states that

> NAME is a maximal sequence of one or more alphanumeric or _
> characters that begins with an alphabetic or _ character

I had taken alphanumeric to mean just letters and numbers, but it looks like the staff solution does not return an error for the input ${A-}. What is the full set of characters that can occur after the first character in NAME?
PREV INDEX NEXT