2.9BSD - /usr/src/cmd/cpp/cpy.y

   1: /*	@(#)cpy.y	2.1	SCCS id keyword	*/
   2: %term number stop DEFINED
   3: %term EQ NE LE GE LS RS
   4: %term ANDAND OROR
   5: %left ','
   6: %right '='
   7: %right '?' ':'
   8: %left OROR
   9: %left ANDAND
  10: %left '|' '^'
  11: %left '&'
  12: %binary EQ NE
  13: %binary '<' '>' LE GE
  14: %left LS RS
  15: %left '+' '-'
  16: %left '*' '/' '%'
  17: %right '!' '~' UMINUS
  18: %left '(' '.'
  19: %%
  20: S:  e stop  ={return($1);}
  21: 
  22: 
  23: e:    e '*' e
  24:         ={$$ = $1 * $3;}
  25:     | e '/' e
  26:         ={$$ = $1 / $3;}
  27:     | e '%' e
  28:         ={$$ = $1 % $3;}
  29:     | e '+' e
  30:         ={$$ = $1 + $3;}
  31:     | e '-' e
  32:         ={$$ = $1 - $3;}
  33:     | e LS e
  34:         ={$$ = $1 << $3;}
  35:     | e RS e
  36:         ={$$ = $1 >> $3;}
  37:     | e '<' e
  38:         ={$$ = $1 < $3;}
  39:     | e '>' e
  40:         ={$$ = $1 > $3;}
  41:     | e LE e
  42:         ={$$ = $1 <= $3;}
  43:     | e GE e
  44:         ={$$ = $1 >= $3;}
  45:     | e EQ e
  46:         ={$$ = $1 == $3;}
  47:     | e NE e
  48:         ={$$ = $1 != $3;}
  49:     | e '&' e
  50:         ={$$ = $1 & $3;}
  51:     | e '^' e
  52:         ={$$ = $1 ^ $3;}
  53:     | e '|' e
  54:         ={$$ = $1 | $3;}
  55:     | e ANDAND e
  56:         ={$$ = $1 && $3;}
  57:     | e OROR e
  58:         ={$$ = $1 || $3;}
  59:     | e '?' e ':' e
  60:         ={$$ = $1 ? $3 : $5;}
  61:     | e ',' e
  62:         ={$$ = $3;}
  63:     | term
  64:         ={$$ = $1;}
  65: term:
  66:       '-' term %prec UMINUS
  67:         ={$$ = -$2;}
  68:     | '!' term
  69:         ={$$ = !$2;}
  70:     | '~' term
  71:         ={$$ = ~$2;}
  72:     | '(' e ')'
  73:         ={$$ = $2;}
  74:     | DEFINED '(' number ')'
  75:         ={$$= $3;}
  76:     | DEFINED number
  77:         ={$$ = $2;}
  78:     | number
  79:         ={$$= $1;}
  80: %%
  81: # include "yylex.c"