Obscure C code (was Re: Excessive optimization)

[Keven Miller]

I have a copy of
Draft Proposed American National Standard for Information Systems
-- Programming Language C
Jan 11, 1988  X3J11/88-001

In section 3.3.3.3 (page 45 line 27) it states
   The result of the logical negation operator ! is 0 if the value of its 
operand compares
unequal to 0, 1 if the value of its operand compares equal to 0. The result 
has type int.
The expression !E is equivalent to (0==E).

Keven Miller

----- Original Message ----- 
From: Eric Smith
To: Sridhar Ayengar
Cc: On-Topic and Off-Topic Posts
Sent: Saturday, December 04, 2010 01:07 AM
Subject: Re: Obscure C code (was Re: Excessive optimization)


Sridhar Ayengar wrote:
 > That's a pretty new standard.  What did older
 > C standards say on the subject?

The same thing.  I just don't have them handy to give specific section
references.