/[bison]/bison/src/derives.h
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revision 1.3 by akim, Tue Nov 7 16:28:46 2000 UTC revision 1.4 by akim, Wed Dec 5 09:28:00 2001 UTC
# Line 1  Line 1 
1  /* Match rules with nonterminals for bison,  /* Match rules with nonterminals for bison,
2     Copyright 1984, 1989, 2000 Free Software Foundation, Inc.     Copyright 1984, 1989, 2000, 2001 Free Software Foundation, Inc.
3    
4     This file is part of Bison, the GNU Compiler Compiler.     This file is part of Bison, the GNU Compiler Compiler.
5    
# Line 21  Line 21 
21  #ifndef DERIVES_H_  #ifndef DERIVES_H_
22  # define DERIVES_H_  # define DERIVES_H_
23    
24    /* DERIVES[SYMBOL - NTOKENS] points to a vector of the number of the
25       rules that SYMBOL derives, terminated with -1.  */
26  extern short **derives;  extern short **derives;
27    
28  /* set_derives finds, for each variable (nonterminal), which rules can  /* Compute DERIVES.  */
    derive it.  It sets up the value of derives so that derives[i -  
    ntokens] points to a vector of rule numbers, terminated with -1.  
    */  
29    
30  void set_derives PARAMS((void));  void set_derives PARAMS((void));
31  void free_derives PARAMS((void));  void free_derives PARAMS((void));

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