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Text File  |  1989-11-04  |  319 b   |  18 lines
  1. %term ID END
  2. %left '+'
  3. %left '*'
  4. %left '('
  5.  
  6. %%
  7. exp:      exp '+' term          = { 1; }
  8.         | term                  = { 2; }
  9.  
  10. term:     term '*' fact         = { 3; }
  11.         | fact                  = { 4; }
  12.  
  13. fact:     '(' exp ')'           = { 5; }
  14.         | ID                    = { 6; }
  15.  
  16. %%
  17.  
  18.