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From: bart <bc@freeuk.com>
Newsgroups: comp.lang.c
Subject: Re: Loops (was Re: do { quit; } else { })
Date: Thu, 24 Apr 2025 09:26:23 +0100
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On 24/04/2025 08:40, Muttley@DastardlyHQ.org wrote:
> On Wed, 23 Apr 2025 18:43:33 -0000 (UTC)
> Kaz Kylheku <643-408-1753@kylheku.com> wibbled:
>> On 2025-04-23, bart <bc@freeuk.com> wrote:
>>> On 23/04/2025 16:31, David Brown wrote:
>>>> On 22/04/2025 22:03, bart wrote:
>>>
>>>> Too few levels of functions and/or macros (there is no semantic
>>>> difference between macros and functions in this matter)
>>>
>>> There is a great deal of difference. Functions tend to be well-formed in
>>> their inputs and outputs.
>>>
>>> Macros take some abitrary blocks of syntax and return another arbitrary
>>> block of syntax:
>>>
>>>       #define INDEX(a, b, y) a y b
>>>       INDEX(a, i, [) ];
>>
>> While that's terrible, I've never seen anything like it in the wild.
> 
> He loves coming up with unrealistic code examples that no decent programmer
> would ever write then points and says look how bad macros must be. Using that
> approach you can easily come up with highly contorted code that no one can read
> as the Obfuscated C contest proves.
> 

And you do like totally ignoring the context. This was an example of how 
macros work compared with how functions work.

Functions return a value of some type; macros yield a bunch of lexical 
tokens.