From: gah@ugcs.caltech.edu   
      
   Chris F Clark wrote:   
      
   (snip regarding C++ parsing)   
      
   >  Worse, I think that some of the devious examples he came up with   
   > required not only semantic input (i.e. which identifiers were   
   > declared as what coming into the sequence), but could change which   
   > identifiers were being declared (as well as what they were being   
   > declared as).   
      
   I am not so sure what features you are considering, but typedef does   
   complicate the separation of lexing and parsing.  Do you have any   
   examples of the ambiguous cases?   
      
   -- glen   
      
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