[r6rs-discuss] Proposed features for small Scheme, part 3: Unicode

[Arthur A. Gleckler]

> Gosh, John, if it's this easy, why did we have all those arguments before
> in which certain people were saying it was /impossible/ to have
> case-insensitive identifiers?
>
> (define (same-identifier? id1 id2)
>  (or (equal? (string-downcase (symbol->string id1))
>              (string-downcase (symbol->string id2)))
>      (equal? (map char-downcase (symbol->string id1))
>              (map char-downcase (symbol->string id2))))
>
> Or maybe you have to upcase it and downcase it for greatest generality?  But
> something like this.  Whatever is most inclusive.
>
> +1 for your proposal if we can have case-insensitivity back!

Thank you so much for bringing this up!  I loathe the change that made
Scheme case-sensitive.  Unicode has a clearly laid out system for
doing case-insensitive comparison of identifiers for programming
languages (<http://unicode.org/reports/tr31/tr31-5.html#R5>), and we
should be able to use it in Scheme.