Messages in this thread | | | Date | Sat, 29 Mar 2008 18:19:38 +0100 | From | Mikael Pettersson <> | Subject | Re: Comma at end of enum lists |
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Jacek Luczak writes: > 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. This idiom allows you to add or remove items without changing adjacent lines.
In a language with strict a comma-as-separator rule you can get this benefit by placing the comma before new items rather than after existing items:
enum { FOO ,FIE ,FUM };
but luckily C doesn't need this perversion.
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