[clisp-list] macros for CLISP -- character literals in strings

[Pascal J.B. <pj...@in...>]

Hoehle, Joerg-Cyril writes:
> Hi,
> 
> Pascal J.Bourguignon wrote:
> >(defconstant +space-list+ '(#\newline #\Return #\Linefeed 
> >#\space #\tab #\page))
> >;; Note, usually, I prefer to keep characters in strings,
> >;; and using POSITION instead of MEMBER.
> >;; It's just harder to come with a string literal containing 
> >these characters.
> 
> Uh? What about
> (coerce '(#\newline #\Return #\Linefeed #\space #\tab #\page) 'string)

Nice!  Thank  you. Up to now  I used FORMAT  to do the same,  but this
sounds better.

> Come on, constant values in Lisp can be computed and result from
> complex computations, unlike preprocessor literals in C.
> 
> Ok, such string literals are not so nice when printed or while in
> the debugger, but that's not the reason you invoke.  " ^M ^L"
> 
> I agree that another case is slightly harder: a mixture of text and
> #\newline in between. E.g. I myself tend to dislike invoking FORMAT
> to achieve constant strings with embedded newlines like in
> (defconstant +foo+ (format nil "First line~%Another line~%"))
> But your example with only special characters does not fall into
> this category.
> 
> Regards,
> 	Jörg Höhle.

-- 
__Pascal_Bourguignon__                     http://www.informatimago.com/
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