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Re: [wg14/wg21 liaison] How to handle conflicting 'unreachable' definitions

From: Martin Uecker <ma.uecker_at_[hidden]>
Date: Thu, 04 Apr 2024 17:17:14 +0200
Am Donnerstag, dem 04.04.2024 um 16:58 +0200 schrieb Jā‚‘ā‚™ā‚› Gustedt via Liaison:
> > Why, for heaven's sake, is 'unreachable' a macro in C?

I wanted it to be a function as this is more useful to C as
well, but somehow I was the only one arguing for it.

> I don't know what the heavens have to do with it, but as you know C
> has its own objectives and traditions.
> From memory, there were two objectives:
> - make the feature testable

This seems unnecessary because it comes with C23.

> - make it easy for C library providers (usually different from
> compiler implementors) to implement it on top of existing features
> such as `__builtin_unreachable`.

Library providers could provide a function and a macro
as the same time as for any other c library function.


Received on 2024-04-04 15:17:17