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From: Marcel Logen <333200007110-0201@ybtra.de>
Newsgroups: sci.crypt
Subject: Re: lun - Lucky Number
Date: Sun, 16 Mar 2025 23:21:50 +0100
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Richard Heathfield in sci.crypt:

>On 16/03/2025 14:57, Marcel Logen wrote:
>>Richard Heathfield in sci.crypt:

>>>#define BIT_QRY(x,i) (((x)[(i)>>3] & (1<<((i)&7)))!=0)
>>
>>This is actually another C question:
>>
>>Why does it have to be "(x)" and "(i)" everywhere instead of
>>"x" and "i"? What kind of "protection" is meant here?
[...]
>If in doubt, steer well clear of side effects in macros.

Ah, OK, all this refers to macros.

I had initially assumed that it was generally about paren-
theses around variable names.

Marcel