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   comp.compilers      Compiler construction, theory, etc. (Mod      2,753 messages   

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   Message 1,886 of 2,753   
   Eric Sosman to Marc van Lieshout   
   Re: Writing a C Compiler: lvalues   
   17 May 10 09:00:28   
   
   XPost: comp.lang.c   
   From: esosman@ieee.org   
      
   On 5/16/2010 4:20 PM, Marc van Lieshout wrote:   
   >   
   > An lvalue is an expression that evaluates to an address, so it *can* be   
   > used on the left hand side of an assignment.   
      
        That won't quite do.  Here are two counter-examples, one an   
   expression that evaluates to an address but is not an lvalue:   
      
   	malloc(42)   
      
   ... and one an lvalue that cannot possibly involve an address:   
      
   	register int x;   
   	x = 42;   
      
   An lvalue (we're talking C here, right?) "is an expression with an   
   object type or an incomplete type other than void" (6.3.2.1p1).   
      
   --   
   Eric Sosman   
   esosman@ieee.org   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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