Messages in this thread | | | Date | Mon, 25 Jul 2005 18:34:13 -0700 | From | Andrew Morton <> | Subject | Re: [patch 2.6.13-rc3] i386: clean up user_mode macros |
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Miles Bader <miles@lsi.nec.co.jp> wrote: > > Linus Torvalds <torvalds@osdl.org> writes: > > Ask a hundred random C programmers what "!!x" means, versus what "x != 0" > > means, and time their replies. > > I've always thought of "!!" as the "canonicalize boolean" operator...
Me too. Once you get used to it, it's just the "convert non-zero to 1" operator.
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