IRC channel logs

<sibl>with Guile ffi, how do I define a function with variable arguments (va_list) like printf ?

<mwette>sibl: you can't do those specifically, you need to define an interface per invocation

<sibl>I see, not very practical but okay, thank you !

<mwette>I think newer libffi may have more help for this but guile hooks are not there.

<mwette>user still needs to specify types for all arguments

<mwette>I believe libffi v4 is targeting a capability to process the va_list.

<old>I don't know for othjer arch, but for System V AMD64 psABI, it should be relativelly straight foward for libffi to handle variadic arguments

<old>I would argue to never use variadic arguments in public API

<mwette>printf is pretty useful

<old>lol sure

<old>In _modern_ public API :p

<cow_2001>is there a way to write  style comments into sxml?

<cow_2001>hmm... (@ (sxml simple) xml->sxml) just drops the  comments

<identity>doubt that sxml provides a way to serialize comments

<ekaitz>cow_2001: I bet you can just dump strings with that content that are not processed

<ekaitz>cow_2001: (lambda () (display "") should do it

<ekaitz>that way you avoid escaping

<ieure>revolting

<cow_2001>ieure: a man gotta do what a man gotta do

<cow_2001>but i doubt it will work

<ekaitz>i wish that was documented... in fact... I think I sent a pr that documents that

<ekaitz>cow_2001: why shouldn't it work? You can make it superclever, if you wish

<cow_2001>oh, and i am using sxml type of builder in haunt

<cow_2001>sxml reader

<lilyp>probably not with (sxml simple), but the ssax one it wraps should have you covered

<lilyp>note though that ssax and simple do some things differently

2025-08-05.log