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Date: Tue, 20 Sep 2022 16:08:03 +0200
From: Jₑₙₛ Gustedt <>
To: Rich Felker <>
Subject: Re: [PATCH] vfprintf: support C2x %b and %B conversion


on Tue, 20 Sep 2022 09:55:54 -0400 you (Rich Felker <>)

> In general, offering non-portable functionality that applications
> can't already generally expect to have on popular systems, with no way
> to probe for availability, does not seem useful, and it's even less
> useful when there's a trivial portable way to do the same thing.

Unfortunately, for the the bit-precise types there isn't. The
supported types may be wider than `long long` (128 and even 256 will
be common values that will probably widely supported) and then the
task of printing them gets as nasty as for today's `__int128`. My hope
was really to get all of these done for once, such that our users may
use their creativity to do more useful stuff.


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