From: mailbox@dmitry-kazakov.de   
      
   On 06/06/2016 09:08, Andreas Schramm wrote:   
      
   > for specifying the syntax of operator expressions   
   > with multiple levels of precedences,   
   > there are essentially two approaches:   
   > (i) by precedence and associativity declarations, and   
   > (ii) by a hierarchy of non-terminals.   
      
   (iii) By only precedence, which I prefer. Associativity is not needed if   
   operator precedence is split into the left and right ones. That allows   
   to express any associativity, unary operators included.   
      
   --   
   Regards,   
   Dmitry A. Kazakov   
   http://www.dmitry-kazakov.de   
      
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