On Thu, 13 Dec 2001, Jeff 'japhy' Pinyan wrote:
> On Dec 14, [EMAIL PROTECTED] said:
>
> >what is the longest piece of perl code $c which is "perl -c" correct with
> >the requirement that each character in $c is ord-less than the next one. ie
>
> !&'()*+-.0123456789<=>@ABCDEFGHIJKLMNOPQRSTUVWXYZ^_abcdefghijklmnopqrstuvwxyz{}
>
> Note the leading space. I think that's as good as you'll get.
I think I can do better, quite easily:
#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
Note the leading space, again. That's using only the printable ASCII
characters, of course. Leading tab, newline, etc. are easy to add, as
are trailing 8-bit characters. But surprisingly enough, the following
also outputs "- syntax OK" for at least versions 5.005_03 and 5.7.1:
perl -e 'print map chr, 0, 4 .. 255' | perl -c
That's a total of 253 out of 256 characters, which seems unbeatable.
No, I've no idea why that works. Explanations gladly accepted.
--
Ilmari Karonen - http://www.sci.fi/~iltzu/
"I'd say the number of people in the world who really understand Perl's
regex code is about three, plus or minus four."
-- Larry Wall on the perl5-porters list
