Slime and string ~
in [Lisp]
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From: Peter Keller on 8 Jul 2010 01:47 Jorge Gajon <gajon(a)gajon.org> wrote: > On 2010-07-08, Peter Keller <psilord(a)cs.wisc.edu> wrote: >> >> What I found I really need is the equivalent of perl's here documents. >> > > Doug Hoyte shows how to implement a 'heredoc' reader in his book > "Let Over Lambda". You can actually read that chapter at it's website: > > http://letoverlambda.com/index.cl/guest/chap4.html#sec_3 HA! Funnily enough, I own that book. I've been so busy understanding some of the other chapters that I completely forgot about that example in the book. :) Thanks for pointing it out, that is pretty useful for me in my context. -pete
From: Rupert Swarbrick on 8 Jul 2010 08:37 Peter Keller <psilord(a)cs.wisc.edu> writes: > > Just before I read this message, I indeed found the same thing. In fact plain > lisp strings do work just fine for my needs when I need a heredoc-like > thing. > > The usual place where it is unhappy is if I have some chunk of code on the > right hand side of the screen and want a long string to be wrapped in a > meaningful manner in accordance with the indention levels around the string. > I don't know if things are being passed through FORMAT, but if so you can use the magic behaviour of ~ followed by a newline. If that occurs in a format string, the new line and all the whitespace immediately following it gets ignored: CL-USER> (format t "Test me ~ please~%") Test me please NIL Of course, if you just want to print string literals, this might be an icky way to do it... Rupert
From: Peter Keller on 8 Jul 2010 11:56 Rupert Swarbrick <rswarbrick(a)gmail.com> wrote: > [-- text/plain, encoding 7bit, charset: ISO-8859-1, 26 lines --] > > I don't know if things are being passed through FORMAT, but if so you > can use the magic behaviour of ~ followed by a newline. If that occurs > in a format string, the new line and all the whitespace immediately > following it gets ignored: > > CL-USER> (format t "Test me ~ > please~%") > Test me please > NIL > > Of course, if you just want to print string literals, this might be an > icky way to do it... This I knew, however, SLIME doesn't indent format strings in this form correctly. That was the main query concerning this thread. I found other means around it, but it was surprising there's be an oversight in the indention algorithm in emacs/SLIME in this context. Thank you. -pete
From: Thomas A. Russ on 8 Jul 2010 13:23
Peter Keller <psilord(a)cs.wisc.edu> writes: > Thomas A. Russ <tar(a)sevak.isi.edu> wrote: > > Either the #. or the constant macro-expansion route will also work. I > > guess my approach would be to use #. if they are literal constants. One > > place I might do that is to define seconds-per-day as #.(* 24 60 60) to > > make it more readable. > > Out of curiosity, I would have assumed any of the popular CL implementations > would have done some kind of optimization with (* 24 60 60), so why would you > explicitly state it to be compiled at read time? Because I'm an old guy and early lisp compilers were not always that smart. -- Thomas A. Russ, USC/Information Sciences Institute |