/[bison]/bison/src/gram.h
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revision 1.51 by eggert, Wed Dec 11 06:33:22 2002 UTC revision 1.52 by eggert, Fri Dec 13 08:25:31 2002 UTC
# Line 1  Line 1 
1  /* Data definitions for internal representation of bison's input,  /* Data definitions for internal representation of Bison's input.
2    
3     Copyright (C) 1984, 1986, 1989, 1992, 2001, 2002     Copyright (C) 1984, 1986, 1989, 1992, 2001, 2002
4     Free Software Foundation, Inc.     Free Software Foundation, Inc.
5    
# Line 124  extern unsigned int nritems; Line 125  extern unsigned int nritems;
125    
126     Therefore, a symbol_number must be a valid item_number, and we     Therefore, a symbol_number must be a valid item_number, and we
127     sometimes have to perform the converse transformation.  */     sometimes have to perform the converse transformation.  */
128  # define symbol_number_as_item_number(Tok) ((item_number) (Tok))  
129  # define item_number_as_symbol_number(Ite) ((symbol_number) (Ite))  static inline item_number
130    symbol_number_as_item_number (symbol_number s)
131    {
132      return s;
133    }
134    
135    static inline symbol_number
136    item_number_as_symbol_number (item_number i)
137    {
138      return i;
139    }
140    
141  extern symbol_number start_symbol;  extern symbol_number start_symbol;
142    
143  /* Rule numbers.  */  /* Rule numbers.  */
144  typedef short rule_number;  typedef short rule_number;
145  extern rule_number nrules;  extern rule_number nrules;
146  # define int_of_rule_number(RNum) ((int) (RNum))  
147  # define rule_number_as_item_number(RNum) ((item_number) (- RNum - 1))  static inline item_number
148  # define item_number_as_rule_number(INum) ((rule_number) (- INum - 1))  rule_number_as_item_number (rule_number r)
149    {
150      return -1 - r;
151    }
152    
153    static inline rule_number
154    item_number_as_rule_number (item_number i)
155    {
156      return -1 - i;
157    }
158    
159    
160  /*--------.  /*--------.

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