/[bison]/bison/src/lalr.h
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revision 1.22 by akim, Wed Jul 3 10:54:33 2002 UTC revision 1.23 by akim, Thu Aug 1 18:12:11 2002 UTC
# Line 21  Line 21 
21  #ifndef LALR_H_  #ifndef LALR_H_
22  # define LALR_H_  # define LALR_H_
23    
24  #include "bitset.h"  # include "bitset.h"
25  #include "bitsetv.h"  # include "bitsetv.h"
26    
27  /* Import the definition of CORE, TRANSITIONS and REDUCTIONS. */  /* Import the definition of CORE, TRANSITIONS and REDUCTIONS. */
28  # include "state.h"  # include "state.h"
# Line 36  Line 36 
36    
37  void lalr PARAMS ((void));  void lalr PARAMS ((void));
38    
39    /* Release the information related to lookaheads.  Can be performed
40       once the action tables are computed.  */
41    
42    void lalr_free PARAMS ((void));
43    
44    
45  /* lalr() builds these data structures. */  /* lalr() builds these data structures. */
46    
# Line 56  extern goto_number_t *goto_map; Line 61  extern goto_number_t *goto_map;
61  extern state_number_t *from_state;  extern state_number_t *from_state;
62  extern state_number_t *to_state;  extern state_number_t *to_state;
63    
 /* LARULE is a vector which records the rules that need lookahead in  
    various states.  The elements of LARULE that apply to state S are  
    those from LOOKAHEADS[S] through LOOKAHEADS[S+1]-1.  
   
    If LR is the length of LArule, then a number from 0 to LR-1 can  
    specify both a rule and a state where the rule might be applied.  
    */  
   
 extern rule_t **LArule;  
   
 /* LA is a LR by NTOKENS matrix of bits.  LA[l, i] is 1 if the rule  
    LAruleno[l] is applicable in the appropriate state when the next  
    token is symbol i.  If LA[l, i] and LA[l, j] are both 1 for i != j,  
    it is a conflict.  */  
   
 extern bitsetv LA;  
   
64    
65  #endif /* !LALR_H_ */  #endif /* !LALR_H_ */

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