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From: Blue-Maned_Hawk <bluemanedhawk@invalid.invalid>
Newsgroups: comp.lang.c
Subject: Help requested with P99-based macro to create Wayland listeners
Date: Tue, 9 Apr 2024 00:36:11 -0000 (UTC)
Organization: A noiseless patient Spider
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This macro doesn't work and i don't know why.  I've tried multiple 
different things to try to delay the expansion of _0MAKE_LISTENER and none 
of them have worked.  I don't know if there's a more idiomatic way to do 
this.  I've tried looking at the output from putting it through ‘cpp’ and 
that didn't work because it errored out before i could see what it 
expanded to.

#define MAKE_LISTENER(object_type, ...) static const struct\
object_type##_listener object_type##_listener = { P99_SEQ(\
_0MAKE_LISTENER, P99_SEQ((object_type), __VA_ARGS__)) }
#define _0MAKE_LISTENER(x) _1MAKE_LISTENER (x, _2MAKE_LISTENER
#define _1MAKE_LISTENER _3MAKE_LISTENER
#define _2MAKE_LISTENER(y) y)
#define _3MAKE_LISTENER _4MAKE_LISTENER
#define _4MAKE_LISTENER(object_type, event_name) .event_name =\
callback_##object_type##_##event_name



-- 
Blue-Maned_Hawk│shortens to Hawk│/blu.mɛin.dʰak/│he/him/his/himself/Mr.
blue-maned_hawk.srht.site
Like many 40-year-olds, these machines have more health issues than 
expected.