* tests/actions.at (Actions after errors): New test case.

[bison.git] / src / print.c

diff --git a/src/print.c b/src/print.c
index 9ed6919e5b42b04f48f2c8e1e59cbc609cc50cd5..ae2ead9a8072b1da594f8b678804433b2879232d 100644 (file)
--- a/src/print.c
+++ b/src/print.c
@@ -48,6 +48,19 @@ print_token (int extnum, int token)
 #endif
 
 \f
 #endif
 
 \f

+
+/*---------------------------------------.
+| *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.  |
 `--------------------------------*/
 /*--------------------------------.
 | Report information on a state.  |
 `--------------------------------*/


@@ -58,6 +71,7 @@ print_core (FILE *out, state_t *state)
   int i;
   item_number_t *sitems = state->items;
   int snritems   = state->nitems;
   int i;
   item_number_t *sitems = state->items;
   int snritems   = state->nitems;

+  symbol_t *previous_lhs = NULL;

 
   /* Output all the items of a state, not only its kernel.  */
   if (report_flag & report_itemsets)
 
   /* Output all the items of a state, not only its kernel.  */
   if (report_flag & report_itemsets)


@@ -67,102 +81,125 @@ print_core (FILE *out, state_t *state)
       snritems = nritemset;
     }
 
       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_t *sp;
+      item_number_t *sp1;
+      int rule;

 
 

-         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);
+      rule = item_number_as_rule_number (*sp);

 
 

-         for (/* Nothing */; *sp >= 0; ++sp)
-           fprintf (out, " %s", symbol_tag_get (symbols[*sp]));
+      rule_lhs_print (&rules[rule], previous_lhs, out);
+      previous_lhs = rules[rule].lhs;

 
 

-         /* Display the lookaheads?  */
-         if (report_flag & report_lookaheads)
-           state_rule_lookaheads_print (state, &rules[rule], out);
+      for (sp = rules[rule].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 lookaheads?  */
+      if (report_flag & report_lookaheads)
+       state_rule_lookaheads_print (state, &rules[rule], out);

 
       fputc ('\n', out);
     }
 }
 
 
 
       fputc ('\n', out);
     }
 }
 
 

+/*----------------------------------------------------------------.
+| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of STATE on |
+| OUT.                                                            |
+`----------------------------------------------------------------*/
+

 static void
 static void

-print_shifts (FILE *out, state_t *state)
+print_transitions (state_t *state, FILE *out, bool display_transitions_p)

 {
 {

+  transitions_t *transitions = state->transitions;
+  size_t width = 0;

   int i;
   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 lookaheads column.  */
+  for (i = 0; i < transitions->num; i++)
+    if (!TRANSITION_IS_DISABLED (transitions, i)
+       && TRANSITION_IS_SHIFT (transitions, 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_t *symbol = symbols[TRANSITION_SYMBOL (transitions, i)];
+       max_length (&width, symbol->tag);

       }
 
       }
 

-  if (i > 0)
-    fputc ('\n', out);
+  /* Nothing to report. */
+  if (!width)
+    return;
+
+  fputc ('\n', out);
+  width += 2;
+
+  /* Report lookaheads and shifts.  */
+  for (i = 0; i < transitions->num; i++)
+    if (!TRANSITION_IS_DISABLED (transitions, i)
+       && TRANSITION_IS_SHIFT (transitions, i) == display_transitions_p)
+      {
+       symbol_t *symbol = symbols[TRANSITION_SYMBOL (transitions, i)];
+       const char *tag = symbol->tag;
+       state_t *state1 = transitions->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"), state1->number);
+       else
+         fprintf (out, _("go to state %d\n"), state1->number);
+      }

 }
 
 
 }
 
 

+/*------------------------------------------------------------.
+| Report the explicit errors of STATE raised from %nonassoc.  |
+`------------------------------------------------------------*/
+

 static void
 print_errs (FILE *out, state_t *state)
 {
   errs_t *errp = state->errs;
 static void
 print_errs (FILE *out, state_t *state)
 {
   errs_t *errp = state->errs;

+  size_t width = 0;

   int i;
 
   int i;
 

-  for (i = 0; i < errp->nerrs; ++i)
-    if (errp->errs[i])
-      fprintf (out, _("    %-4s\terror (nonassociative)\n"),
-              symbol_tag_get (symbols[errp->errs[i]]));
-
-  if (i > 0)
-    fputc ('\n', out);
-}
-
-
-static void
-print_gotos (FILE *out, state_t *state)
-{
-  int i;
-  shifts_t *shiftp = state->shifts;
+  /* Compute the width of the lookaheads column.  */
+  for (i = 0; i < errp->num; ++i)
+    if (errp->symbols[i])
+      max_length (&width, errp->symbols[i]->tag);

 
 

-  for (i = 0; i < shiftp->nshifts && SHIFT_IS_SHIFT (shiftp, i); i++)
-    /* Skip token shifts.  */;
+  /* Nothing to report. */
+  if (!width)
+    return;

 
 

-  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);
-         }
+  fputc ('\n', out);
+  width += 2;

 
 

-      fputc ('\n', out);
-    }
+  /* Report lookaheads 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);
+      }

 }
 
 
 }
 
 


@@ -172,7 +209,7 @@ print_gotos (FILE *out, state_t *state)
 `----------------------------------------------------------*/
 
 static rule_t *
 `----------------------------------------------------------*/
 
 static rule_t *

-state_default_rule_compute (state_t *state)
+state_default_rule (state_t *state)

 {
   reductions_t *redp = state->reductions;
   rule_t *default_rule = NULL;
 {
   reductions_t *redp = state->reductions;
   rule_t *default_rule = NULL;


@@ -181,58 +218,85 @@ state_default_rule_compute (state_t *state)
 
   /* No need for a lookahead.  */
   if (state->consistent)
 
   /* No need for a lookahead.  */
   if (state->consistent)

-    return &rules[redp->rules[0]];
+    return redp->rules[0];

 
   /* 1. Each reduction is possibly masked by the lookaheads on which
      we shift (S/R conflicts)...  */
   bitset_zero (shiftset);
   {
 
   /* 1. Each reduction is possibly masked by the lookaheads on which
      we shift (S/R conflicts)...  */
   bitset_zero (shiftset);
   {

-    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_t *transitions = state->transitions;
+    FOR_EACH_SHIFT (transitions, i)
+      {
+       /* If this state has a shift for the error token, don't use a

             default rule.  */
             default rule.  */

-         if (SHIFT_IS_ERROR (shiftp, i))
-           return NULL;
-         bitset_set (shiftset, SHIFT_SYMBOL (shiftp, i));
-       }
+       if (TRANSITION_IS_ERROR (transitions, i))
+         return NULL;
+       bitset_set (shiftset, TRANSITION_SYMBOL (transitions, i));
+      }

   }
 
   /* 2. Each reduction is possibly masked by the lookaheads on which
      we raise an error (due to %nonassoc).  */
   {
     errs_t *errp = state->errs;
   }
 
   /* 2. Each reduction is possibly masked by the lookaheads 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]);
+    for (i = 0; i < errp->num; i++)
+      if (errp->symbols[i])
+       bitset_set (shiftset, errp->symbols[i]->number);

   }
 
   }
 

-  for (i = 0; i < state->nlookaheads; ++i)
+  for (i = 0; i < redp->num; ++i)

     {
       int count = 0;
 
       /* How many non-masked lookaheads are there for this reduction?
         */
     {
       int count = 0;
 
       /* How many non-masked lookaheads are there for this reduction?
         */

-      bitset_andn (lookaheadset, state->lookaheads[i], shiftset);
+      bitset_andn (lookaheadset, redp->lookaheads[i], shiftset);

       count = bitset_count (lookaheadset);
 
       if (count > cmax)
        {
          cmax = count;
       count = bitset_count (lookaheadset);
 
       if (count > cmax)
        {
          cmax = count;

-         default_rule = state->lookaheads_rule[i];
+         default_rule = redp->rules[i];

        }
 
       /* 3. And finally, each reduction is possibly masked by previous
         reductions (in R/R conflicts, we keep the first reductions).
         */
        }
 
       /* 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 (shiftset, shiftset, redp->lookaheads[i]);

     }
 
   return default_rule;
 }
 
 
     }
 
   return default_rule;
 }
 
 

+/*--------------------------------------------------------------------.
+| Report a reduction of RULE on LOOKAHEADS (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_reduction (FILE *out, size_t width,
+                const char *lookahead,
+                rule_t *rule, bool enabled)
+{
+  int j;
+  fprintf (out, "    %s", lookahead);
+  for (j = width - strlen (lookahead); j > 0; --j)
+    fputc (' ', out);
+  if (!enabled)
+    fputc ('[', out);
+  if (rule->number)
+    fprintf (out, _("reduce using rule %d (%s)"),
+            rule->number, rule->lhs->tag);
+  else
+    fprintf (out, _("accept"));
+  if (!enabled)
+    fputc (']', out);
+  fputc ('\n', out);
+}
+
+

 /*----------------------------------------------------.
 | Report on OUT the reduction actions of this STATE.  |
 `----------------------------------------------------*/
 /*----------------------------------------------------.
 | Report on OUT the reduction actions of this STATE.  |
 `----------------------------------------------------*/


@@ -240,65 +304,90 @@ state_default_rule_compute (state_t *state)
 static void
 print_reductions (FILE *out, state_t *state)
 {
 static void
 print_reductions (FILE *out, state_t *state)
 {

-  int i;
-  shifts_t *shiftp = state->shifts;
+  transitions_t *transitions = state->transitions;

   reductions_t *redp = state->reductions;
   rule_t *default_rule = NULL;
   reductions_t *redp = state->reductions;
   rule_t *default_rule = NULL;

+  size_t width = 0;
+  int i, j;

 
 

-  if (redp->nreds == 0)
+  if (redp->num == 0)

     return;
 
     return;
 

-  default_rule = state_default_rule_compute (state);
+  default_rule = state_default_rule (state);

 
   bitset_zero (shiftset);
 
   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));
-
-  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));
-             }
-         }
-    }
+  FOR_EACH_SHIFT (transitions, i)
+    bitset_set (shiftset, TRANSITION_SYMBOL (transitions, i));

 
 

+  /* Compute the width of the lookaheads column.  */

   if (default_rule)
   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 (redp->lookaheads)
+    for (i = 0; i < ntokens; i++)
+      {
+       int count = bitset_test (shiftset, i);
+
+       for (j = 0; j < redp->num; ++j)
+         if (bitset_test (redp->lookaheads[j], i))
+           {
+             if (count == 0)
+               {
+                 if (redp->rules[j] != default_rule)
+                   max_length (&width, symbols[i]->tag);
+                 count++;
+               }
+             else
+               {
+                 max_length (&width, symbols[i]->tag);
+               }
+           }
+      }
+
+  /* Nothing to report. */
+  if (!width)
+    return;
+

   fputc ('\n', out);
   fputc ('\n', out);

+  width += 2;
+
+  /* Report lookaheads (or $default) and reductions.  */
+  if (redp->lookaheads)
+    for (i = 0; i < ntokens; i++)
+      {
+       int defaulted = 0;
+       int count = bitset_test (shiftset, i);
+
+       for (j = 0; j < redp->num; ++j)
+         if (bitset_test (redp->lookaheads[j], i))
+           {
+             if (count == 0)
+               {
+                 if (redp->rules[j] != default_rule)
+                   print_reduction (out, width,
+                                    symbols[i]->tag,
+                                    redp->rules[j], true);
+                 else
+                   defaulted = 1;
+                 count++;
+               }
+             else
+               {
+                 if (defaulted)
+                   print_reduction (out, width,
+                                    symbols[i]->tag,
+                                    default_rule, true);
+                 defaulted = 0;
+                 print_reduction (out, width,
+                                  symbols[i]->tag,
+                                  redp->rules[j], false);
+               }
+           }
+      }
+
+  if (default_rule)
+    print_reduction (out, width,
+                    _("$default"), default_rule, true);

 }
 
 
 }
 
 


@@ -310,36 +399,33 @@ print_reductions (FILE *out, state_t *state)
 static void
 print_actions (FILE *out, state_t *state)
 {
 static void
 print_actions (FILE *out, state_t *state)
 {

-  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 shifts.  */
+  print_transitions (state, out, true);

   print_errs (out, state);
   print_reductions (out, state);
   print_errs (out, state);
   print_reductions (out, state);

-  print_gotos (out, state);
+  /* Print gotos.  */
+  print_transitions (state, out, false);

 }
 
 
 }
 
 

+/*--------------------------------------.
+| Report all the data on STATE on OUT.  |
+`--------------------------------------*/
+

 static void
 print_state (FILE *out, state_t *state)
 {
 static void
 print_state (FILE *out, state_t *state)
 {

-  fprintf (out, _("state %d"), state->number);

   fputs ("\n\n", out);
   fputs ("\n\n", out);

+  fprintf (out, _("state %d"), state->number);
+  fputc ('\n', out);

   print_core (out, state);
   print_actions (out, state);
   if ((report_flag & report_solved_conflicts)
       && state->solved_conflicts)
   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);
+    {
+      fputc ('\n', out);
+      fputs (state->solved_conflicts, out);
+    }

 }
 \f
 /*-----------------------------------------.
 }
 \f
 /*-----------------------------------------.


@@ -371,7 +457,7 @@ print_grammar (FILE *out)
   for (i = 0; i < max_user_token_number + 1; i++)
     if (token_translations[i] != undeftoken->number)
       {
   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]]);
+       const char *tag = symbols[token_translations[i]]->tag;

        rule_number_t r;
        item_number_t *rhsp;
 
        rule_number_t r;
        item_number_t *rhsp;
 


@@ -381,12 +467,12 @@ print_grammar (FILE *out)
        END_TEST (50);
        sprintf (buffer, " (%d)", i);
 
        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);
          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);
                break;
              }
        fprintf (out, "%s\n", buffer);


@@ -399,9 +485,9 @@ print_grammar (FILE *out)
     {
       int left_count = 0, right_count = 0;
       rule_number_t r;
     {
       int left_count = 0, right_count = 0;
       rule_number_t r;

-      const char *tag = symbol_tag_get (symbols[i]);
+      const char *tag = symbols[i]->tag;

 
 

-      for (r = 1; r < nrules + 1; r++)
+      for (r = 0; r < nrules; r++)

        {
          item_number_t *rhsp;
          if (rules[r].lhs->number == i)
        {
          item_number_t *rhsp;
          if (rules[r].lhs->number == i)


@@ -425,11 +511,11 @@ print_grammar (FILE *out)
          END_TEST (50);
          sprintf (buffer + strlen (buffer), _(" on left:"));
 
          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)
            {
              END_TEST (65);
              if (rules[r].lhs->number == i)

-               sprintf (buffer + strlen (buffer), " %d", r - 1);
+               sprintf (buffer + strlen (buffer), " %d", r);

            }
        }
 
            }
        }
 


@@ -439,21 +525,20 @@ print_grammar (FILE *out)
            sprintf (buffer + strlen (buffer), ",");
          END_TEST (50);
          sprintf (buffer + strlen (buffer), _(" on right:"));
            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;
              for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++)
                if (item_number_as_symbol_number (*rhsp) == i)
                  {
                    END_TEST (65);
            {
              item_number_t *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);
     }
                    break;
                  }
            }
        }
       fprintf (out, "%s\n", buffer);
     }

-  fputs ("\n\n", out);

 }
 \f
 void
 }
 \f
 void


@@ -466,6 +551,8 @@ print_results (void)
   FILE *out = xfopen (spec_verbose_file, "w");
 
   reduce_output (out);
   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);
   conflicts_output (out);
 
   print_grammar (out);