Investiage syntax extensions to use dynamic content instead of string literal

[jcubic]

In SRFI-163 there is new syntax:

#2a((11 12 13) (21 22 23))

It's currently not possible to implement this as an extension.

Using Regular Expression together with string may allow to implement this:

New proposal:

(set-special! #/#[0-9]+a/ 'make-array lips.specials.SPLICE)

I'm not sure how hard it will be to extend the Lexer to use regex instead of string literal.