Re: [MIT-Scheme-devel] checking for legal XML characters

[Chris Hanson]

Taylor R Campbell wrote:
> Is there a better way to check whether a string consists solely of
> legal XML characters than this?  What I really want is a way to walk
> across UTF-8 strings, with which UTF8-STRING-IN-ALPHABET? could be
> implemented, I suppose.  (OK, what I *really* want is to see my
> alternative string API implemented -- module system first, though.)

OK, I created procedures for-all-chars-in-string? and
for-any-char-in-string?, which should do what you want.  There's also a
procedure alphabet-predicate that creates an appropriate predicate
argument for passing into one of the former.

That about what you wanted?