linux-kernel - Re: Comma at end of enum lists

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Message-ID: <47EE7C3A.5000909@zytor.com>
Date:	Sat, 29 Mar 2008 10:28:26 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Al Viro <viro@...IV.linux.org.uk>
CC:	Jacek Luczak <difrost.kernel@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Comma at end of enum lists

Al Viro wrote:
> On Sat, Mar 29, 2008 at 10:20:38AM -0700, H. Peter Anvin wrote:
>> Jacek Luczak wrote:
>>> Hi All,
>>>
>>> I've found that in many enum lists, there's a comma at the end, e.g. 
>>> (arch/x86/kernel/early_printk.c):
>>>
>>> enum {
>>>        MAGIC1 = 0xBACCD00A,
>>>        MAGIC2 = 0xCA110000,
>>>        XOPEN = 5,
>>>        XWRITE = 4,
>>> };
>>>
>>> Just out of curiosity, is there any particular reason here (no word in 
>>> CodingStyle about that).
>>>
>> Yes, it's so you can add a line without affecting the line before it, 
>> making a one-line patch into a two-line patch that's more likely to 
>> conflict.
> 
> Note that doing that makes sense only when you can expect additions to
> the end and even then it's a matter of taste.

Yes, it is.

I personally prefer it this way (strongly) for exactly the same reason C 
requires a semicolon at the end of each statement, as opposed to Pascal 
which doesn't require a semicolon immediately before an "end".

	-hpa
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