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From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups: comp.lang.c
Subject: Re: "A diagram of C23 basic types"
Date: Fri, 4 Apr 2025 04:50:37 +0200
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On 03.04.2025 11:03, David Brown wrote:
> On 02/04/2025 23:43, Janis Papanagnou wrote:
>> On 02.04.2025 16:59, David Brown wrote:
>>> [...]
>>>
>>>  From the next version beyond C23, so far there is :
>>>
>>> 1. Declarations in "if" and "switch" statements, like those in "for"
>>> loops, helps keep local variable scopes small and neat.
>>
>> Oh, I thought that would already be supported in some existing "C"
>> version for the 'if'; I probably confused that with C++.
>>
> 
> C++17 has it.
> 
> I guess the C committee waited until C++17 had been common enough that
> they could see if it was useful in real code, and if it lead to any
> unexpected problems in code or compilers before copying it for C.

Really, that recent!? - I was positive that I used it long before 2017
during the days when I did quite regularly C++ programming. - Could it
be that some GNU compiler (C++ or "C") supported that before it became
C++ standard?

Janis