Exploring Programming Language Architecture in Perl (Scheme-Like Interpreter) | Hacker News Reader

Exploring Programming Language Architecture in Perl (Scheme-Like Interpreter)

billhails.net

43 pointsdraegtun3 comments

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That was pleasantly surprising. Very thorough and highly recommended.

Don't miss the PDF link for later perusal.

http://billhails.net/Book/EPLAiP.pdf

Nice find draegtun, thanks!

I wonder why I haven't seen this book before?

It felt like seeing pictures from my childhood, since when I studied long ago Lisp was the first language taught. I've written partial implementation of lisps a couple of times, it isn't hard -- and quite beautiful.

(It's a pity it isn't using the new Perl 6/Rakudo parsing stuff, which is probably too new.)

On CPAN there is a small Perl Lisp interpreter: http://search.cpan.org/dist/perl-lisp/

It seems to have be written for the express purpose of parsing Gnu newsreader 'eld' files! (example here: http://cpansearch.perl.org/src/GAAS/perl-lisp-0.06/newsrc.el...).

Here is a more general Lisp example in the distribution:

    (defun sum (a b &optional c)
      (write a b c)
      (+ a b))

    (setq a 100)
    (setq b (sum 4 5))
    (write (print (list a b)))

    (write (ord "a"))
    (write (chr ?a))

    (write "Yesterday was:" (localtime (- (time) (* 24 60 60))))
    (setq pid (perl-eval "$$"))

    (setq a 10)
    (while (not (zerop a))
      (write a)
      (setq a (1- a)))

    (list "Good bye")

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