From: bartc@freeuk.com   
      
   "Pallav singh"  wrote in message   
   news:10-04-073@comp.compilers...   
      
   > should user be allowed to write multiple not   
   >   
   > not not not ( expr );   
   > not not  ( expr );   
      
   > [How does associativity matter here?  Those examples may be redundant   
   > ... -John]   
      
   'not not expr' is sometimes used to force a value of zero or one (rather   
   than zero or not zero).   
      
   And when 'expr' is a textual macro, then 'not expr' may well expand to 'not   
   not ...'.   
      
   So a string of 'not's can be jolly useful..   
      
   --   
   Bartc   
      
   --- SoupGate-Win32 v1.05   
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