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<zacque>
Hi, I don't get the OBJECT parameter in PPRINT-LOGICAL-BLOCK. It's stated that "The object is normally a list that the body forms are responsible for printing." Yet, it makes no difference if I pass a list object or NIL into it
<zacque>
Ah, makes sense! I was confused by the first SIMPLE-PPRINT-DEFUN example, didn't notice that PPRINT-POP is used in the PPRINT-LET example
<zacque>
Thanks!
<yitzi>
np
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<zacque>
CLHS 22.2.1.1 is so difficult to understand. Does anyone have the code to generate Figure 22-3?
<zacque>
(a) Is there a line break at the end of "000000000000000000000000000"? Or does it wrap around to "11"? (b) So, is the space in "11 111111111111111111111111" meant to be a whitespace or a line break? (c) Why are there so many spaces before "22 222", "333 3333", and "444..."?
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<asarch>
How are the multi-lines comments?
<jackdaniel>
#| bo \n bo \n |#
<jackdaniel>
or #+(or)"boo\nbo\nbo"
<jackdaniel>
and #-(and)"boo\nbo\nbo"
<jackdaniel>
alternatively ;;; foo \n;;; bar
<asarch>
Thank you, thank you very much :-)
<jackdaniel>
I have a strong conviction that you should know that by now if you were listening to advices on this channel
<asarch>
I lost the half of the log when I was trying to build the OpenSmalltalk-VM with OpenBSD
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<asarch>
I clobber the main partition by mistake with dd if=/dev/zero of=/dev/sda bs=512 count=1 :-(
<jackdaniel>
I don't really care, my point is that instead of doing systematic study you waste people time by pursuing chaotic endvaours (that in itself is fine, but you keep coming here to ask very basic questions for years)
<jackdaniel>
openbsd and partitioning is offtopic on this channel
<asarch>
I know, I know
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<asarch>
And I really appreciate your help with my basic questions
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<asarch>
My web app gets better every time I ask something like this
<asarch>
I am still stuck at the part where I need to generate Lisp code dynamically a la (:htm (:body (:table (:thead (:tr (:th …) (:th …) (:th …) …)))))
<asarch>
The (:th …) part
<asarch>
How could you pass a list to a function to generate the table header columns and then pass the result to the (:htm) generator?
<jackdaniel>
minion: tell asarch about pcl
<minion>
asarch: look at pcl: pcl-book: "Practical Common Lisp", an introduction to Common Lisp by Peter Seibel, available at http://www.gigamonkeys.com/book/ and in dead-tree form from Apress (as of 11 April 2005).
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<madnificent>
jackdaniel: I think we should inform that hte first section of PCL is a bit outdated. It starts with setting up an environment and part of that is now commonly handled by quicklisp. The book is great and I've bought a few to motivate peers.
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<jackdaniel>
madnificent: sure
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<thuna`>
Does anyone know the equivalent of `unread-char' for non-character streams?
<Bike>
i don't believe there is one, but the flexi-streams library has an unread-byte.
<thuna`>
Hm. How does unread-char work anyway?
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<jackdaniel>
there is usually a slot that maintains "unread" object
<jackdaniel>
next read takes it
<jackdaniel>
variation that allows multiple unreads may maintain a list with push/pop
<jackdaniel>
unread is a standardized hack ;) if there is scan pointer then it may be simply decremented
<jackdaniel>
but that applies only to some streams
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<Guest74>
anyone know if there's a function you can call from lisp to clear the slime repl?
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<Alfr>
Guest74, slime-repl-clear-..
<Guest74>
from common lisp.
<Alfr>
Guest74, only if you allow cl to control emacs.
<Guest74>
not a problem.
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<Guest74>
I'm guessing those functions use a global that isn't present when you send something over to be eval'd.
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<Alfr>
Guest74, can't look that up rn, using sly on this machine, sorry.
<Alfr>
Guest74, best guess, simply affecting the current buffer in emacs?
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<Guest74>
best guess about what?
<Alfr>
Guest74, about how the command decides what buffer to clear.
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<jackdaniel>
autogenerated is fine because I may use it with sdl2 docs. also too much is already done to switch
<mfiano>
One feature you might find interesting in the most recent SDL2 release this month is subpixel precision
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<mfiano>
There are new structs for rects etc that take floats.
<jackdaniel>
I'm utilizing gl context for the renderer
<mfiano>
Aha
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<mfiano>
The renderer will use gl on linux if using the texture api.
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<mfiano>
I find the gl context overkill in most cases :)
<mfiano>
the hardware accelerated abstraction is usually what I want these days
<jackdaniel>
I know that sdl renderer is accelerated, but it lacks some features. also, this is for a tutorial too
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<morganw>
I'm 95% sure that the GL context is needed to avoid some issues with some Intel graphics drivers/chipsets on Linux.
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<mfiano>
Most issues with Intel graphics driver on Linux stems from Mesa relying on floating point errors to fail silently when linking shader programs, which happens in both an explicit GL context and with SDL2's implicit GL context, unless you mask the float traps yourself.
<mfiano>
Useless trivia: I have submitted so many bug reports to Mesa in this regard that my game engine's shader code is used in Mesa's test suite, but it's a losing battle I gave up on a long time ago.
<mfiano>
CL generated shader code is in the Linux intel driver :)
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<rotateq>
oh really? cool
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