IRC channel logs

<IHateIrc>void_pointer: yup. SCIP

<void_pointer>Haven't actually done the book myself. Have looked at it in a couple places though. I learned scheme from "Teach Yourself Scheme in Fixnum Days", the Guile Manual, the R6RS standards documents, and some writing by many different people on macros

<IHateIrc>I glanced over the r5rs document. I didn't read it VERY throuhly. I need to learn more about delimited continuations and some other things that didn't make sense.

<zv>gyep

<zv>also, gotta spam myself here

<zv>cuz SICP

<zv> https://github.com/zv/SICP-guile

<mg_>I'm wrapping a c api (with (system foreign) stuff), and it makes sense to express it through goops I think. Is there any hook I can set up so that I free the appropriate resources when an instance is gced? Or do I have to do that manually

<mg_>2

<wingo>mg_: see the foreign object docs for 2.2, you can attach a finalizer

<wingo>ACTION sent sandbox module to guile-devel; review welcome

<wingo>mark_weaver: hey, your thoughts very welcome re: sandbox proposal on guile-devel

<mg_>wingo: thanks. I'm on 2.0.13 currently (nixos). But I chose to make a c wrapper instead, which I saw had the finalizer argument

<mg_>and on that note, is there a good way to go from a c array of stuff to a scm list?

<wingo>not a great way, no -- you have to do that manually

<mg_>so basically start with an empty list, loop the array and build with scm_list_2(scm_from_something(item), list) ?

<wingo>build with scm_cons from the back

<wingo>res = SCM_EOL; while (n--) res = scm_cons (scm_from_something (items[n]), res);

<wingo>something like that

<mg_>right. Couldn't find scm_cons in the docs, makes sense that that exists!

<mg_>Thanks alot mate :)

<daviid>hello guilers!

<mg_>does anyone have any links to what you consider well written guile c extensions?

<civodul>mg_: i think you can check things like guile-cairo, guile-rsvg, guile-ncurses, etc.

<civodul>well, these are all bindings, not sure if that's what you're looking for

<civodul>if you're writing bindings, i recommend using (system foreign) instead of the C API

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<mg_>civodul: any specific reason for that?

<mg_>I'm writing a binding to a c++ lib

<mg_>(but it has a c interface included, it that matters)

<mg_>I tried going down that route first, but couldn't find any info on how to e.g. handle c enums

<daviid>mg_: there is (rnrs enums)

<daviid>guile-squee use this module: https://notabug.org/cwebber/guile-squee/src/devel/squee/enum.scm

<daviid>I use goops, in g-golf, because g-golf will use goops anyway, here is the module, for info http://git.savannah.gnu.org/cgit/g-golf.git/tree/g-golf/support/enum.scm and here is an example of use of it to define <genum> it http://git.savannah.gnu.org/cgit/g-golf.git/tree/g-golf/gobject/enum-flags.scm and using it http://git.savannah.gnu.org/cgit/g-golf.git/tree/g-golf/gi/types.scm

<daviid>mg_: ^^

<civodul>ooh i didn't know these

<civodul>mg_: the FFI allows you to write pure Scheme code, which is generally more "fun" and more flexible

<civodul>you can do live hacking as well

<civodul>but for enums, yeah, either you use sophisticated machinery to determine the enum values

<civodul>or you hardcode them as Scheme constants

<civodul>which is generally okay if the C library has a reasonably stable ABI

<dsmith-work>Happy Friday, Guilers!!

<mg_>daviid/civodul: thanks for the pointers (no pun intended). I'll take a look tonight

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<dsmith-work>mg_: The ffi will be even nicer when guile generates native code. Who knows, might be able to inline the calls and be more efficient than the C wrappers.

<mg_>dsmith-work: that would be nice! I guess I'm more used to C style languages so that feels simpler, but the goal is to learn so (system foreign) it is

<dsmith-work>mg_: Yeah, C is my native tongue, so I usually reach for it first too.

<mg_>hm, how do i deal with a signature like "int some_func(enum some_enum **stuff)?

<paroneayea>ACTION implementing a fun stack based language on top of guile

<janneke>,L postscript? ;-)

<paroneayea>janneke: nope! it's kind of like PushGP, but it uses generic methods which "search" the stack for applicable values rather than have different stacks for each type

<paroneayea>janneke: I plan to write a genetic programming environment on top of it.

<janneke>whoa, paroneayea!

<paroneayea>:)

<paroneayea>the goal is to have a distributed anti-abuse system

<paroneayea>where your anti-abuse programs make babies with the programs of people you trust

<paroneayea>who knows if I'll get there

<paroneayea>in the meanwhile it's fun to explore

<janneke>:-)

<zv>did you know that the word 'guile' comes from the anglo-saxon 'wign' meanings "witchcraft"

<civodul>fun :-)

<dsmith-work>wile

<gazon>zv: i would love to know source of that entomological info