Re: code critique


On Wed, 30 May 2007 17:13:27 +0200, Daniel Leidisch <news@xxxxxxxxxxxx> said:
| In article <87r6oyigvo.fsf@xxxxxxxxxxxxxxxxxx> you wrote:
|| ...
|| * A portability caveat: ANSI Common Lisp does not require characters
|| to be encoded in ASCII or any other encoding, and so CODE-CHAR may
|| not do what you expect here.

| Do you have any suggestions as to how to implement this
| more portably? After a quick (apropos 'ascii) I recognized
| that all fbound symbols are in the SB-IMPL package (sbcl is my
| cl-implementation of choice), so I assume that there is no standard
| way to do it. The first thing that came to my mind was to add an
| ascii table lookup myself. Is there a better solution?

Not really. Either you or a library writer needs to provide the
mapping for URL-encoded characters. (Imagine that your program is
running in EBCDIC land; how can it have "native" knowledge that,
say, #x20 (rather than #x40) is the code for #\Space?)

---Vassil.


--
The truly good code is the obviously correct code.
.

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