Re: 10 languages

Nice, I'm surprised there was more to add without breaking the rest. I've been looking at Lisp myself, but unfortunately there doesn't seem to be a way to add that without making either the C or the Lisp code invalid, or removing some other language. (C, Lisp, Perl, and maybe sh and TeX is doable though. The big problem is PostScript.)

Update: Yup, C, Lisp, Perl, sh and TeX is possible:

// +'+%#|
//\output{\setbox0\vbox{\box255}\setbox0\hbox{\parindent0ptJust anothe
+r \TeX\ hacker,}\shipout\box0}\bye
#include <stdio.h>
int main() { puts("Just another C hacker,"); }
/*%|# (princ "Just another Lisp hacker,
") (quit) +'+ 2>&- if print "Just another Perl hacker,
" and exit; printf "Just another sh hacker,
"; exit #*/
[download]

Comment on Re: 10 languages Download Code

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Re^2: 10 languages by Anonymous Monk on Jan 17, 2006 at 17:42 UTC
If you open a paren in PostScript, it just starts a string, which you can cancel later with `pop'. And a paren is a quite harmless character in most other languages. See the 1st two lines in my original code.	[reply]
Re^3: 10 languages by truedfx (Monk) on Jan 17, 2006 at 19:36 UTC
Thanks. Unfortunately, the problem is that a C program (again, unless you don't mind making it invalid) can't start with a `(`; it must start with a keyword after preprocessing, and before preprocessing, the only ways around that are by starting with `#`, `%:`, `//`, `/*`, or `_Pragma`, possibly combined with `\`. (Technically, trigraphs could also be used, but `??` causes even bigger problems.) Comments in Lisp start with `;` or are embedded in `#\|...\|#`, so the opening must be a valid Lisp expression. The two things that don't break C that I could find are `//`, and `#\` followed by a newline. Both seem to unconditionally break PostScript, but if you have a way around that, I'd be very interested.	[reply] [d/l] [select]


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