[lkml]   [2008]   [Aug]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] BUILD_BUG_ON sucks
On Saturday 16 August 2008 20:09:48 Alexey Dobriyan wrote:
> BUILD_BUG_ON should have never existed -- BUG_ON could upgrade itself to
> compile-breaking version if compiler has enough information and this is
> what patch does.
> The only downside is that one can't write BUG_ON(1) anymore.

Interesting idea, but I've come to actually like the semantic explicitness of
BUILD_BUG_ON. There's a difference between "we should never get here"
and "this should never exist".

But maybe I just like it because we have it. At very least BUILD_BUG_ON
should definitely compile-barf on a non-constant expr, and vice versa for

Note that BUG_ON() is a hack caused by lack of attribute((cold)). "if (x)
BUG()" is clearer, and possible in the long run as people upgrade compilers.


 \ /
  Last update: 2008-08-16 12:59    [W:0.092 / U:2.948 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site