X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/bc933ef16d171af4f27616649c7a99c77e9b75fe..02d12d0de29cd35a6fd2acabc551e0d89b3fa242:/src/print.c

diff --git a/src/print.c b/src/print.c
index 9ed6919e..cb1600c9 100644
--- a/src/print.c
+++ b/src/print.c
@@ -1,5 +1,6 @@
 /* Print information on generated parser, for bison,
-   Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002
+
+   Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002, 2003, 2004, 2005
    Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
@@ -16,28 +17,30 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
+#include <config.h>
 #include "system.h"
-#include "quotearg.h"
-#include "files.h"
-#include "symtab.h"
-#include "gram.h"
+
+#include <bitset.h>
+#include <quotearg.h>
+
 #include "LR0.h"
-#include "lalr.h"
+#include "closure.h"
 #include "conflicts.h"
+#include "files.h"
 #include "getargs.h"
-#include "state.h"
-#include "reader.h"
+#include "gram.h"
+#include "lalr.h"
 #include "print.h"
+#include "reader.h"
 #include "reduce.h"
-#include "closure.h"
-#include "bitset.h"
+#include "state.h"
+#include "symtab.h"
 
-static bitset shiftset;
-static bitset lookaheadset;
+static bitset shift_set;
+static bitset look_ahead_set;
 
 #if 0
 static void
@@ -48,16 +51,30 @@ print_token (int extnum, int token)
 #endif
 
 
+
+/*---------------------------------------.
+| *WIDTH := max (*WIDTH, strlen (STR)).  |
+`---------------------------------------*/
+
+static void
+max_length (size_t *width, const char *str)
+{
+  size_t len = strlen (str);
+  if (len > *width)
+    *width = len;
+}
+
 /*--------------------------------.
 | Report information on a state.  |
 `--------------------------------*/
 
 static void
-print_core (FILE *out, state_t *state)
+print_core (FILE *out, state *s)
 {
-  int i;
-  item_number_t *sitems = state->items;
-  int snritems   = state->nitems;
+  size_t i;
+  item_number *sitems = s->items;
+  size_t snritems = s->nitems;
+  symbol *previous_lhs = NULL;
 
   /* Output all the items of a state, not only its kernel.  */
   if (report_flag & report_itemsets)
@@ -67,279 +84,348 @@ print_core (FILE *out, state_t *state)
       snritems = nritemset;
     }
 
-  if (snritems)
-    {
-      for (i = 0; i < snritems; i++)
-	{
-	  item_number_t *sp;
-	  item_number_t *sp1;
-	  int rule;
+  if (!snritems)
+    return;
 
-	  sp1 = sp = ritem + sitems[i];
+  fputc ('\n', out);
 
-	  while (*sp >= 0)
-	    sp++;
+  for (i = 0; i < snritems; i++)
+    {
+      item_number *sp;
+      item_number *sp1;
+      rule_number r;
 
-	  rule = -(*sp);
-	  fprintf (out, "    %s  ->  ", symbol_tag_get (rules[rule].lhs));
+      sp1 = sp = ritem + sitems[i];
 
-	  for (sp = rules[rule].rhs; sp < sp1; sp++)
-	    fprintf (out, "%s ", symbol_tag_get (symbols[*sp]));
+      while (*sp >= 0)
+	sp++;
 
-	  fputc ('.', out);
+      r = item_number_as_rule_number (*sp);
 
-	  for (/* Nothing */; *sp >= 0; ++sp)
-	    fprintf (out, " %s", symbol_tag_get (symbols[*sp]));
+      rule_lhs_print (&rules[r], previous_lhs, out);
+      previous_lhs = rules[r].lhs;
 
-	  /* Display the lookaheads?  */
-	  if (report_flag & report_lookaheads)
-	    state_rule_lookaheads_print (state, &rules[rule], out);
+      for (sp = rules[r].rhs; sp < sp1; sp++)
+	fprintf (out, " %s", symbols[*sp]->tag);
+      fputs (" .", out);
+      for (/* Nothing */; *sp >= 0; ++sp)
+	fprintf (out, " %s", symbols[*sp]->tag);
 
-	  fprintf (out, _("   (rule %d)"), rule - 1);
-	  fputc ('\n', out);
-	}
+      /* Display the look-ahead tokens?  */
+      if (report_flag & report_look_ahead_tokens)
+	state_rule_look_ahead_tokens_print (s, &rules[r], out);
 
       fputc ('\n', out);
     }
 }
 
 
+/*------------------------------------------------------------.
+| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of S on |
+| OUT.                                                        |
+`------------------------------------------------------------*/
+
 static void
-print_shifts (FILE *out, state_t *state)
+print_transitions (state *s, FILE *out, bool display_transitions_p)
 {
+  transitions *trans = s->transitions;
+  size_t width = 0;
   int i;
-  shifts_t *shiftp = state->shifts;
 
-  for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
-    if (!SHIFT_IS_DISABLED (shiftp, i))
+  /* Compute the width of the look-ahead token column.  */
+  for (i = 0; i < trans->num; i++)
+    if (!TRANSITION_IS_DISABLED (trans, i)
+	&& TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
       {
-	state_number_t state1 = shiftp->shifts[i];
-	symbol_number_t symbol = states[state1]->accessing_symbol;
-	fprintf (out,
-		 _("    %-4s\tshift, and go to state %d\n"),
-		 symbol_tag_get (symbols[symbol]), state1);
+	symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+	max_length (&width, sym->tag);
       }
 
-  if (i > 0)
-    fputc ('\n', out);
-}
-
-
-static void
-print_errs (FILE *out, state_t *state)
-{
-  errs_t *errp = state->errs;
-  int i;
+  /* Nothing to report. */
+  if (!width)
+    return;
 
-  for (i = 0; i < errp->nerrs; ++i)
-    if (errp->errs[i])
-      fprintf (out, _("    %-4s\terror (nonassociative)\n"),
-	       symbol_tag_get (symbols[errp->errs[i]]));
+  fputc ('\n', out);
+  width += 2;
 
-  if (i > 0)
-    fputc ('\n', out);
+  /* Report look-ahead tokens and shifts.  */
+  for (i = 0; i < trans->num; i++)
+    if (!TRANSITION_IS_DISABLED (trans, i)
+	&& TRANSITION_IS_SHIFT (trans, i) == display_transitions_p)
+      {
+	symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)];
+	const char *tag = sym->tag;
+	state *s1 = trans->states[i];
+	int j;
+
+	fprintf (out, "    %s", tag);
+	for (j = width - strlen (tag); j > 0; --j)
+	  fputc (' ', out);
+	if (display_transitions_p)
+	  fprintf (out, _("shift, and go to state %d\n"), s1->number);
+	else
+	  fprintf (out, _("go to state %d\n"), s1->number);
+      }
 }
 
 
+/*--------------------------------------------------------.
+| Report the explicit errors of S raised from %nonassoc.  |
+`--------------------------------------------------------*/
+
 static void
-print_gotos (FILE *out, state_t *state)
+print_errs (FILE *out, state *s)
 {
+  errs *errp = s->errs;
+  size_t width = 0;
   int i;
-  shifts_t *shiftp = state->shifts;
 
-  for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
-    /* Skip token shifts.  */;
+  /* Compute the width of the look-ahead token column.  */
+  for (i = 0; i < errp->num; ++i)
+    if (errp->symbols[i])
+      max_length (&width, errp->symbols[i]->tag);
 
-  if (i < shiftp->nshifts)
-    {
-      for (; i < shiftp->nshifts; i++)
-	if (!SHIFT_IS_DISABLED (shiftp, i))
-	  {
-	    state_number_t state1 = shiftp->shifts[i];
-	    symbol_number_t symbol = states[state1]->accessing_symbol;
-	    fprintf (out, _("    %-4s\tgo to state %d\n"),
-		     symbol_tag_get (symbols[symbol]), state1);
-	  }
+  /* Nothing to report. */
+  if (!width)
+    return;
 
-      fputc ('\n', out);
-    }
+  fputc ('\n', out);
+  width += 2;
+
+  /* Report look-ahead tokens and errors.  */
+  for (i = 0; i < errp->num; ++i)
+    if (errp->symbols[i])
+      {
+	const char *tag = errp->symbols[i]->tag;
+	int j;
+	fprintf (out, "    %s", tag);
+	for (j = width - strlen (tag); j > 0; --j)
+	  fputc (' ', out);
+	fputs (_("error (nonassociative)\n"), out);
+      }
 }
 
 
-/*----------------------------------------------------------.
-| Return the default rule of this STATE if it has one, NULL |
-| otherwise.                                                |
-`----------------------------------------------------------*/
+/*-------------------------------------------------------------.
+| Return the default rule of S if it has one, NULL otherwise.  |
+`-------------------------------------------------------------*/
 
-static rule_t *
-state_default_rule_compute (state_t *state)
+static rule *
+state_default_rule (state *s)
 {
-  reductions_t *redp = state->reductions;
-  rule_t *default_rule = NULL;
+  reductions *reds = s->reductions;
+  rule *default_rule = NULL;
   int cmax = 0;
   int i;
 
-  /* No need for a lookahead.  */
-  if (state->consistent)
-    return &rules[redp->rules[0]];
+  /* No need for a look-ahead.  */
+  if (s->consistent)
+    return reds->rules[0];
 
-  /* 1. Each reduction is possibly masked by the lookaheads on which
+  /* 1. Each reduction is possibly masked by the look-ahead tokens on which
      we shift (S/R conflicts)...  */
-  bitset_zero (shiftset);
+  bitset_zero (shift_set);
   {
-    shifts_t *shiftp = state->shifts;
-    for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
-      if (!SHIFT_IS_DISABLED (shiftp, i))
-	{
-	  /* If this state has a shift for the error token, don't use a
+    transitions *trans = s->transitions;
+    FOR_EACH_SHIFT (trans, i)
+      {
+	/* If this state has a shift for the error token, don't use a
 	     default rule.  */
-	  if (SHIFT_IS_ERROR (shiftp, i))
-	    return NULL;
-	  bitset_set (shiftset, SHIFT_SYMBOL (shiftp, i));
-	}
+	if (TRANSITION_IS_ERROR (trans, i))
+	  return NULL;
+	bitset_set (shift_set, TRANSITION_SYMBOL (trans, i));
+      }
   }
 
-  /* 2. Each reduction is possibly masked by the lookaheads on which
+  /* 2. Each reduction is possibly masked by the look-ahead tokens on which
      we raise an error (due to %nonassoc).  */
   {
-    errs_t *errp = state->errs;
-    for (i = 0; i < errp->nerrs; i++)
-      if (errp->errs[i])
-	bitset_set (shiftset, errp->errs[i]);
+    errs *errp = s->errs;
+    for (i = 0; i < errp->num; i++)
+      if (errp->symbols[i])
+	bitset_set (shift_set, errp->symbols[i]->number);
   }
 
-  for (i = 0; i < state->nlookaheads; ++i)
+  for (i = 0; i < reds->num; ++i)
     {
       int count = 0;
 
-      /* How many non-masked lookaheads are there for this reduction?
-	 */
-      bitset_andn (lookaheadset, state->lookaheads[i], shiftset);
-      count = bitset_count (lookaheadset);
+      /* How many non-masked look-ahead tokens are there for this
+	 reduction?  */
+      bitset_andn (look_ahead_set, reds->look_ahead_tokens[i], shift_set);
+      count = bitset_count (look_ahead_set);
 
       if (count > cmax)
 	{
 	  cmax = count;
-	  default_rule = state->lookaheads_rule[i];
+	  default_rule = reds->rules[i];
 	}
 
       /* 3. And finally, each reduction is possibly masked by previous
 	 reductions (in R/R conflicts, we keep the first reductions).
 	 */
-      bitset_or (shiftset, shiftset, state->lookaheads[i]);
+      bitset_or (shift_set, shift_set, reds->look_ahead_tokens[i]);
     }
 
   return default_rule;
 }
 
 
-/*----------------------------------------------------.
-| Report on OUT the reduction actions of this STATE.  |
-`----------------------------------------------------*/
+/*--------------------------------------------------------------------------.
+| Report a reduction of RULE on LOOK_AHEAD_TOKEN (which can be `default').  |
+| If not ENABLED, the rule is masked by a shift or a reduce (S/R and        |
+| R/R conflicts).                                                           |
+`--------------------------------------------------------------------------*/
 
 static void
-print_reductions (FILE *out, state_t *state)
+print_reduction (FILE *out, size_t width,
+		 const char *look_ahead_token,
+		 rule *r, bool enabled)
 {
-  int i;
-  shifts_t *shiftp = state->shifts;
-  reductions_t *redp = state->reductions;
-  rule_t *default_rule = NULL;
+  int j;
+  fprintf (out, "    %s", look_ahead_token);
+  for (j = width - strlen (look_ahead_token); j > 0; --j)
+    fputc (' ', out);
+  if (!enabled)
+    fputc ('[', out);
+  if (r->number)
+    fprintf (out, _("reduce using rule %d (%s)"), r->number, r->lhs->tag);
+  else
+    fprintf (out, _("accept"));
+  if (!enabled)
+    fputc (']', out);
+  fputc ('\n', out);
+}
 
-  if (redp->nreds == 0)
-    return;
 
-  default_rule = state_default_rule_compute (state);
+/*-------------------------------------------.
+| Report on OUT the reduction actions of S.  |
+`-------------------------------------------*/
 
-  bitset_zero (shiftset);
-  for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
-    if (!SHIFT_IS_DISABLED (shiftp, i))
-      bitset_set (shiftset, SHIFT_SYMBOL (shiftp, i));
+static void
+print_reductions (FILE *out, state *s)
+{
+  transitions *trans = s->transitions;
+  reductions *reds = s->reductions;
+  rule *default_rule = NULL;
+  size_t width = 0;
+  int i, j;
 
-  for (i = 0; i < ntokens; i++)
-    {
-      int j;
-      int defaulted = 0;
-      int count = bitset_test (shiftset, i);
-
-      for (j = 0; j < state->nlookaheads; ++j)
-	if (bitset_test (state->lookaheads[j], i))
-	  {
-	    if (count == 0)
-	      {
-		if (state->lookaheads_rule[j] != default_rule)
-		  fprintf (out,
-			   _("    %-4s\treduce using rule %d (%s)\n"),
-			   symbol_tag_get (symbols[i]),
-			   state->lookaheads_rule[j]->number - 1,
-			   symbol_tag_get_n (state->lookaheads_rule[j]->lhs, 1));
-		else
-		  defaulted = 1;
-		count++;
-	      }
-	    else
-	      {
-		if (defaulted)
-		  fprintf (out,
-			   _("    %-4s\treduce using rule %d (%s)\n"),
-			   symbol_tag_get (symbols[i]),
-			   default_rule->number - 1,
-			   symbol_tag_get_n (default_rule->lhs, 1));
-		defaulted = 0;
-		fprintf (out,
-			 _("    %-4s\t[reduce using rule %d (%s)]\n"),
-			 symbol_tag_get (symbols[i]),
-			 state->lookaheads_rule[j]->number - 1,
-			 symbol_tag_get_n (state->lookaheads_rule[j]->lhs, 1));
-	      }
-	  }
-    }
+  if (reds->num == 0)
+    return;
 
+  default_rule = state_default_rule (s);
+
+  bitset_zero (shift_set);
+  FOR_EACH_SHIFT (trans, i)
+    bitset_set (shift_set, TRANSITION_SYMBOL (trans, i));
+
+  /* Compute the width of the look-ahead token column.  */
   if (default_rule)
-    fprintf (out, _("    $default\treduce using rule %d (%s)\n"),
-	     default_rule->number - 1,
-	     symbol_tag_get (default_rule->lhs));
+    width = strlen (_("$default"));
+
+  if (reds->look_ahead_tokens)
+    for (i = 0; i < ntokens; i++)
+      {
+	bool count = bitset_test (shift_set, i);
+
+	for (j = 0; j < reds->num; ++j)
+	  if (bitset_test (reds->look_ahead_tokens[j], i))
+	    {
+	      if (! count)
+		{
+		  if (reds->rules[j] != default_rule)
+		    max_length (&width, symbols[i]->tag);
+		  count = true;
+		}
+	      else
+		{
+		  max_length (&width, symbols[i]->tag);
+		}
+	    }
+      }
+
+  /* Nothing to report. */
+  if (!width)
+    return;
+
   fputc ('\n', out);
+  width += 2;
+
+  /* Report look-ahead tokens (or $default) and reductions.  */
+  if (reds->look_ahead_tokens)
+    for (i = 0; i < ntokens; i++)
+      {
+	bool defaulted = false;
+	bool count = bitset_test (shift_set, i);
+
+	for (j = 0; j < reds->num; ++j)
+	  if (bitset_test (reds->look_ahead_tokens[j], i))
+	    {
+	      if (! count)
+		{
+		  if (reds->rules[j] != default_rule)
+		    print_reduction (out, width,
+				     symbols[i]->tag,
+				     reds->rules[j], true);
+		  else
+		    defaulted = true;
+		  count = true;
+		}
+	      else
+		{
+		  if (defaulted)
+		    print_reduction (out, width,
+				     symbols[i]->tag,
+				     default_rule, true);
+		  defaulted = false;
+		  print_reduction (out, width,
+				   symbols[i]->tag,
+				   reds->rules[j], false);
+		}
+	    }
+      }
+
+  if (default_rule)
+    print_reduction (out, width,
+		     _("$default"), default_rule, true);
 }
 
 
 /*--------------------------------------------------------------.
 | Report on OUT all the actions (shifts, gotos, reductions, and |
-| explicit erros from %nonassoc) of STATE.                      |
+| explicit erros from %nonassoc) of S.                          |
 `--------------------------------------------------------------*/
 
 static void
-print_actions (FILE *out, state_t *state)
+print_actions (FILE *out, state *s)
 {
-  reductions_t *redp = state->reductions;
-  shifts_t *shiftp = state->shifts;
-
-  if (shiftp->nshifts == 0 && redp->nreds == 0)
-    {
-      if (state->number == final_state->number)
-	fprintf (out, _("    $default\taccept\n"));
-      else
-	fprintf (out, _("    NO ACTIONS\n"));
-      return;
-    }
-
-  print_shifts (out, state);
-  print_errs (out, state);
-  print_reductions (out, state);
-  print_gotos (out, state);
+  /* Print shifts.  */
+  print_transitions (s, out, true);
+  print_errs (out, s);
+  print_reductions (out, s);
+  /* Print gotos.  */
+  print_transitions (s, out, false);
 }
 
 
+/*----------------------------------.
+| Report all the data on S on OUT.  |
+`----------------------------------*/
+
 static void
-print_state (FILE *out, state_t *state)
+print_state (FILE *out, state *s)
 {
-  fprintf (out, _("state %d"), state->number);
-  fputs ("\n\n", out);
-  print_core (out, state);
-  print_actions (out, state);
-  if ((report_flag & report_solved_conflicts)
-      && state->solved_conflicts)
-    fputs (state->solved_conflicts, out);
   fputs ("\n\n", out);
+  fprintf (out, _("state %d"), s->number);
+  fputc ('\n', out);
+  print_core (out, s);
+  print_actions (out, s);
+  if ((report_flag & report_solved_conflicts) && s->solved_conflicts)
+    {
+      fputc ('\n', out);
+      fputs (s->solved_conflicts, out);
+    }
 }
 
 /*-----------------------------------------.
@@ -360,7 +446,7 @@ do {						\
 static void
 print_grammar (FILE *out)
 {
-  symbol_number_t i;
+  symbol_number i;
   char buffer[90];
   int column = 0;
 
@@ -371,9 +457,9 @@ print_grammar (FILE *out)
   for (i = 0; i < max_user_token_number + 1; i++)
     if (token_translations[i] != undeftoken->number)
       {
-	const char *tag = symbol_tag_get (symbols[token_translations[i]]);
-	rule_number_t r;
-	item_number_t *rhsp;
+	const char *tag = symbols[token_translations[i]]->tag;
+	rule_number r;
+	item_number *rhsp;
 
 	buffer[0] = 0;
 	column = strlen (tag);
@@ -381,12 +467,12 @@ print_grammar (FILE *out)
 	END_TEST (50);
 	sprintf (buffer, " (%d)", i);
 
-	for (r = 1; r < nrules + 1; r++)
+	for (r = 0; r < nrules; r++)
 	  for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
 	    if (item_number_as_symbol_number (*rhsp) == token_translations[i])
 	      {
 		END_TEST (65);
-		sprintf (buffer + strlen (buffer), " %d", r - 1);
+		sprintf (buffer + strlen (buffer), " %d", r);
 		break;
 	      }
 	fprintf (out, "%s\n", buffer);
@@ -398,12 +484,12 @@ print_grammar (FILE *out)
   for (i = ntokens; i < nsyms; i++)
     {
       int left_count = 0, right_count = 0;
-      rule_number_t r;
-      const char *tag = symbol_tag_get (symbols[i]);
+      rule_number r;
+      const char *tag = symbols[i]->tag;
 
-      for (r = 1; r < nrules + 1; r++)
+      for (r = 0; r < nrules; r++)
 	{
-	  item_number_t *rhsp;
+	  item_number *rhsp;
 	  if (rules[r].lhs->number == i)
 	    left_count++;
 	  for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
@@ -425,11 +511,11 @@ print_grammar (FILE *out)
 	  END_TEST (50);
 	  sprintf (buffer + strlen (buffer), _(" on left:"));
 
-	  for (r = 1; r < nrules + 1; r++)
+	  for (r = 0; r < nrules; r++)
 	    {
 	      END_TEST (65);
 	      if (rules[r].lhs->number == i)
-		sprintf (buffer + strlen (buffer), " %d", r - 1);
+		sprintf (buffer + strlen (buffer), " %d", r);
 	    }
 	}
 
@@ -439,33 +525,34 @@ print_grammar (FILE *out)
 	    sprintf (buffer + strlen (buffer), ",");
 	  END_TEST (50);
 	  sprintf (buffer + strlen (buffer), _(" on right:"));
-	  for (r = 1; r < nrules + 1; r++)
+	  for (r = 0; r < nrules; r++)
 	    {
-	      item_number_t *rhsp;
+	      item_number *rhsp;
 	      for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
 		if (item_number_as_symbol_number (*rhsp) == i)
 		  {
 		    END_TEST (65);
-		    sprintf (buffer + strlen (buffer), " %d", r - 1);
+		    sprintf (buffer + strlen (buffer), " %d", r);
 		    break;
 		  }
 	    }
 	}
       fprintf (out, "%s\n", buffer);
     }
-  fputs ("\n\n", out);
 }
 
 void
 print_results (void)
 {
-  state_number_t i;
+  state_number i;
 
   /* We used to use just .out if SPEC_NAME_PREFIX (-p) was used, but
      that conflicts with Posix.  */
   FILE *out = xfopen (spec_verbose_file, "w");
 
   reduce_output (out);
+  grammar_rules_partial_print (out,
+			       _("Rules never reduced"), rule_never_reduced_p);
   conflicts_output (out);
 
   print_grammar (out);
@@ -475,12 +562,12 @@ print_results (void)
   if (report_flag & report_itemsets)
     new_closure (nritems);
   /* Storage for print_reductions.  */
-  shiftset =  bitset_create (ntokens, BITSET_FIXED);
-  lookaheadset = bitset_create (ntokens, BITSET_FIXED);
+  shift_set =  bitset_create (ntokens, BITSET_FIXED);
+  look_ahead_set = bitset_create (ntokens, BITSET_FIXED);
   for (i = 0; i < nstates; i++)
     print_state (out, states[i]);
-  bitset_free (shiftset);
-  bitset_free (lookaheadset);
+  bitset_free (shift_set);
+  bitset_free (look_ahead_set);
   if (report_flag & report_itemsets)
     free_closure ();