Copy BYacc's nice way to report the grammar.

[bison.git] / src / print.c

diff --git a/src/print.c b/src/print.c
index 7be9f63df48eb70d2d868aff23bda3bf4385b7aa..280ac8d8417acbe5c4ffe8def58090df8968d31c 100644 (file)
--- a/src/print.c
+++ b/src/print.c
@@ -1,5 +1,6 @@
 /* Print information on generated parser, for bison,
 /* Print information on generated parser, for bison,

-   Copyright 1984, 1986, 1989, 2000, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002
+   Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -46,19 +47,6 @@ print_token (int extnum, int token)
 }
 #endif
 
 }
 #endif
 

-static inline const char *
-escape (const char *s)
-{
-  return quotearg_n_style (1, escape_quoting_style, s);
-}
-
-/* Be cautious not to use twice the same slot in a single expression. */
-static inline const char *
-escape2 (const char *s)
-{
-  return quotearg_n_style (2, escape_quoting_style, s);
-}
-

 \f
 /*--------------------------------.
 | Report information on a state.  |
 \f
 /*--------------------------------.
 | Report information on a state.  |


@@ -68,24 +56,23 @@ static void
 print_core (FILE *out, state_t *state)
 {
   int i;
 print_core (FILE *out, state_t *state)
 {
   int i;

-  short *sitems = state->items;
-  int snitems   = state->nitems;
+  item_number_t *sitems = state->items;
+  int snritems   = state->nitems;

 
 

-  /* New experimental feature: if TRACE_FLAGS output all the items of
-     a state, not only its kernel.  */
-  if (trace_flag)
+  /* Output all the items of a state, not only its kernel.  */
+  if (report_flag & report_itemsets)

     {
     {

-      closure (sitems, snitems);
+      closure (sitems, snritems);

       sitems = itemset;
       sitems = itemset;

-      snitems = nitemset;
+      snritems = nritemset;

     }
 
     }
 

-  if (snitems)
+  if (snritems)

     {
     {

-      for (i = 0; i < snitems; i++)
+      for (i = 0; i < snritems; i++)

        {
        {

-         short *sp;
-         short *sp1;
+         item_number_t *sp;
+         item_number_t *sp1;

          int rule;
 
          sp1 = sp = ritem + sitems[i];
          int rule;
 
          sp1 = sp = ritem + sitems[i];


@@ -94,15 +81,40 @@ print_core (FILE *out, state_t *state)
            sp++;
 
          rule = -(*sp);
            sp++;
 
          rule = -(*sp);

-         fprintf (out, "    %s  ->  ", escape (symbols[rules[rule].lhs]->tag));
+         fprintf (out, "    %s  ->  ", symbol_tag_get (rules[rule].lhs));

 
          for (sp = rules[rule].rhs; sp < sp1; sp++)
 
          for (sp = rules[rule].rhs; sp < sp1; sp++)

-           fprintf (out, "%s ", escape (symbols[*sp]->tag));
+           fprintf (out, "%s ", symbol_tag_get (symbols[*sp]));

 
          fputc ('.', out);
 
          for (/* Nothing */; *sp >= 0; ++sp)
 
          fputc ('.', out);
 
          for (/* Nothing */; *sp >= 0; ++sp)

-           fprintf (out, " %s", escape (symbols[*sp]->tag));
+           fprintf (out, " %s", symbol_tag_get (symbols[*sp]));
+
+         /* Display the lookaheads?  */
+         if (report_flag & report_lookaheads)
+           {
+             int j, k;
+             int nlookaheads = 0;
+             /* Look for lookaheads corresponding to this rule. */
+             for (j = 0; j < state->nlookaheads; ++j)
+               for (k = 0; k < ntokens; ++k)
+                 if (bitset_test (LA[state->lookaheadsp + j], k)
+                     && LArule[state->lookaheadsp + j]->number == rule)
+                   nlookaheads++;
+             if (nlookaheads)
+               {
+                 fprintf (out, "  [");
+                 for (j = 0; j < state->nlookaheads; ++j)
+                   for (k = 0; k < ntokens; ++k)
+                     if (bitset_test (LA[state->lookaheadsp + j], k)
+                         && LArule[state->lookaheadsp + j]->number == rule)
+                       fprintf (out, "%s%s",
+                                symbol_tag_get (symbols[k]),
+                                --nlookaheads ? ", " : "");
+                 fprintf (out, "]");
+               }
+           }

 
          fprintf (out, _("   (rule %d)"), rule - 1);
          fputc ('\n', out);
 
          fprintf (out, _("   (rule %d)"), rule - 1);
          fputc ('\n', out);


@@ -123,10 +135,10 @@ print_shifts (FILE *out, state_t *state)
     if (!SHIFT_IS_DISABLED (shiftp, i))
       {
        int state1 = shiftp->shifts[i];
     if (!SHIFT_IS_DISABLED (shiftp, i))
       {
        int state1 = shiftp->shifts[i];

-       int symbol = states[state1]->accessing_symbol;
+       symbol_number_t symbol = states[state1]->accessing_symbol;

        fprintf (out,
                 _("    %-4s\tshift, and go to state %d\n"),
        fprintf (out,
                 _("    %-4s\tshift, and go to state %d\n"),

-                escape (symbols[symbol]->tag), state1);
+                symbol_tag_get (symbols[symbol]), state1);

       }
 
   if (i > 0)
       }
 
   if (i > 0)


@@ -143,7 +155,7 @@ print_errs (FILE *out, state_t *state)
   for (i = 0; i < errp->nerrs; ++i)
     if (errp->errs[i])
       fprintf (out, _("    %-4s\terror (nonassociative)\n"),
   for (i = 0; i < errp->nerrs; ++i)
     if (errp->errs[i])
       fprintf (out, _("    %-4s\terror (nonassociative)\n"),

-              escape (symbols[errp->errs[i]]->tag));
+              symbol_tag_get (symbols[errp->errs[i]]));

 
   if (i > 0)
     fputc ('\n', out);
 
   if (i > 0)
     fputc ('\n', out);


@@ -165,9 +177,9 @@ print_gotos (FILE *out, state_t *state)
        if (!SHIFT_IS_DISABLED (shiftp, i))
          {
            int state1 = shiftp->shifts[i];
        if (!SHIFT_IS_DISABLED (shiftp, i))
          {
            int state1 = shiftp->shifts[i];

-           int symbol = states[state1]->accessing_symbol;
+           symbol_number_t symbol = states[state1]->accessing_symbol;

            fprintf (out, _("    %-4s\tgo to state %d\n"),
            fprintf (out, _("    %-4s\tgo to state %d\n"),

-                    escape (symbols[symbol]->tag), state1);
+                    symbol_tag_get (symbols[symbol]), state1);

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


@@ -189,9 +201,9 @@ print_reductions (FILE *out, state_t *state)
   if (state->consistent)
     {
       int rule = redp->rules[0];
   if (state->consistent)
     {
       int rule = redp->rules[0];

-      int symbol = rules[rule].lhs;
+      symbol_number_t symbol = rules[rule].lhs->number;

       fprintf (out, _("    $default\treduce using rule %d (%s)\n\n"),
       fprintf (out, _("    $default\treduce using rule %d (%s)\n\n"),

-              rule - 1, escape (symbols[symbol]->tag));
+              rule - 1, symbol_tag_get (symbols[symbol]));

       return;
     }
 
       return;
     }
 


@@ -213,24 +225,26 @@ print_reductions (FILE *out, state_t *state)
 
   if (state->nlookaheads == 1 && !nodefault)
     {
 
   if (state->nlookaheads == 1 && !nodefault)
     {

-      int default_rule = LAruleno[state->lookaheadsp];
+      rule_t *default_rule = LArule[state->lookaheadsp];

 
       bitset_and (lookaheadset, LA[state->lookaheadsp], shiftset);
 
       for (i = 0; i < ntokens; i++)
        if (bitset_test (lookaheadset, i))
          fprintf (out, _("    %-4s\t[reduce using rule %d (%s)]\n"),
 
       bitset_and (lookaheadset, LA[state->lookaheadsp], shiftset);
 
       for (i = 0; i < ntokens; i++)
        if (bitset_test (lookaheadset, i))
          fprintf (out, _("    %-4s\t[reduce using rule %d (%s)]\n"),

-                  escape (symbols[i]->tag), default_rule - 1,
-                  escape2 (symbols[rules[default_rule].lhs]->tag));
+                  symbol_tag_get (symbols[i]),
+                  default_rule->number - 1,
+                  symbol_tag_get_n (default_rule->lhs, 1));

 
       fprintf (out, _("    $default\treduce using rule %d (%s)\n\n"),
 
       fprintf (out, _("    $default\treduce using rule %d (%s)\n\n"),

-              default_rule - 1, escape (symbols[rules[default_rule].lhs]->tag));
+              default_rule->number - 1,
+              symbol_tag_get (default_rule->lhs));

     }
   else if (state->nlookaheads >= 1)
     {
       int cmax = 0;
       int default_LA = -1;
     }
   else if (state->nlookaheads >= 1)
     {
       int cmax = 0;
       int default_LA = -1;

-      int default_rule = 0;
+      rule_t *default_rule = NULL;

 
       if (!nodefault)
        for (i = 0; i < state->nlookaheads; ++i)
 
       if (!nodefault)
        for (i = 0; i < state->nlookaheads; ++i)


@@ -248,7 +262,7 @@ print_reductions (FILE *out, state_t *state)
              {
                cmax = count;
                default_LA = state->lookaheadsp + i;
              {
                cmax = count;
                default_LA = state->lookaheadsp + i;

-               default_rule = LAruleno[state->lookaheadsp + i];
+               default_rule = LArule[state->lookaheadsp + i];

              }
 
            bitset_or (shiftset, shiftset, lookaheadset);
              }
 
            bitset_or (shiftset, shiftset, lookaheadset);


@@ -274,9 +288,9 @@ print_reductions (FILE *out, state_t *state)
                    if (state->lookaheadsp + j != default_LA)
                      fprintf (out,
                               _("    %-4s\treduce using rule %d (%s)\n"),
                    if (state->lookaheadsp + j != default_LA)
                      fprintf (out,
                               _("    %-4s\treduce using rule %d (%s)\n"),

-                              escape (symbols[i]->tag),
-                              LAruleno[state->lookaheadsp + j] - 1,
-                              escape2 (symbols[rules[LAruleno[state->lookaheadsp + j]].lhs]->tag));
+                              symbol_tag_get (symbols[i]),
+                              LArule[state->lookaheadsp + j]->number - 1,
+                              symbol_tag_get_n (LArule[state->lookaheadsp + j]->lhs, 1));

                    else
                      defaulted = 1;
 
                    else
                      defaulted = 1;
 


@@ -287,23 +301,23 @@ print_reductions (FILE *out, state_t *state)
                    if (defaulted)
                      fprintf (out,
                               _("    %-4s\treduce using rule %d (%s)\n"),
                    if (defaulted)
                      fprintf (out,
                               _("    %-4s\treduce using rule %d (%s)\n"),

-                              escape (symbols[i]->tag),
-                              LAruleno[default_LA] - 1,
-                              escape2 (symbols[rules[LAruleno[default_LA]].lhs]->tag));
+                              symbol_tag_get (symbols[i]),
+                              LArule[default_LA]->number - 1,
+                              symbol_tag_get_n (LArule[default_LA]->lhs, 1));

                    defaulted = 0;
                    fprintf (out,
                             _("    %-4s\t[reduce using rule %d (%s)]\n"),
                    defaulted = 0;
                    fprintf (out,
                             _("    %-4s\t[reduce using rule %d (%s)]\n"),

-                            escape (symbols[i]->tag),
-                            LAruleno[state->lookaheadsp + j] - 1,
-                            escape2 (symbols[rules[LAruleno[state->lookaheadsp + j]].lhs]->tag));
+                            symbol_tag_get (symbols[i]),
+                            LArule[state->lookaheadsp + j]->number - 1,
+                            symbol_tag_get_n (LArule[state->lookaheadsp + j]->lhs, 1));

                  }
              }
        }
 
       if (default_LA >= 0)
        fprintf (out, _("    $default\treduce using rule %d (%s)\n"),
                  }
              }
        }
 
       if (default_LA >= 0)
        fprintf (out, _("    $default\treduce using rule %d (%s)\n"),

-                default_rule - 1,
-                escape (symbols[rules[default_rule].lhs]->tag));
+                default_rule->number - 1,
+                symbol_tag_get (default_rule->lhs));

     }
 }
 
     }
 }
 


@@ -336,6 +350,9 @@ print_state (FILE *out, state_t *state)
   fputs ("\n\n", out);
   print_core (out, state);
   print_actions (out, state);
   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);
 }
 \f
   fputs ("\n\n", out);
 }
 \f


@@ -357,48 +374,32 @@ do {                                              \
 static void
 print_grammar (FILE *out)
 {
 static void
 print_grammar (FILE *out)
 {

-  int i, j;
-  short *rule;
+  symbol_number_t i;
+  item_number_t *rule;

   char buffer[90];
   int column = 0;
 
   char buffer[90];
   int column = 0;
 

-  /* rule # : LHS -> RHS */
-  fprintf (out, "%s\n\n", _("Grammar"));
-  fprintf (out, "  %s\n", _("Number, Line, Rule"));
-  for (i = 1; i < nrules + 1; i++)
-    /* Don't print rules disabled in reduce_grammar_tables.  */
-    if (rules[i].useful)
-      {
-       fprintf (out, _("  %3d %3d %s ->"),
-                i - 1, rules[i].line, escape (symbols[rules[i].lhs]->tag));
-       rule = rules[i].rhs;
-       if (*rule >= 0)
-         while (*rule >= 0)
-           fprintf (out, " %s", escape (symbols[*rule++]->tag));
-       else
-         fprintf (out, " /* %s */", _("empty"));
-       fputc ('\n', out);
-      }
-  fputs ("\n\n", out);
-
+  grammar_rules_print (out);

 
   /* TERMINAL (type #) : rule #s terminal is on RHS */
   fprintf (out, "%s\n\n", _("Terminals, with rules where they appear"));
   for (i = 0; i < max_user_token_number + 1; i++)
 
   /* TERMINAL (type #) : rule #s terminal is on RHS */
   fprintf (out, "%s\n\n", _("Terminals, with rules where they appear"));
   for (i = 0; i < max_user_token_number + 1; i++)

-    if (token_translations[i] != 2)
+    if (token_translations[i] != undeftoken->number)

       {
       {

+       const char *tag = symbol_tag_get (symbols[token_translations[i]]);
+       int r;

        buffer[0] = 0;
        buffer[0] = 0;

-       column = strlen (escape (symbols[token_translations[i]]->tag));
-       fputs (escape (symbols[token_translations[i]]->tag), out);
+       column = strlen (tag);
+       fputs (tag, out);

        END_TEST (50);
        sprintf (buffer, " (%d)", i);
 
        END_TEST (50);
        sprintf (buffer, " (%d)", i);
 

-       for (j = 1; j < nrules + 1; j++)
-         for (rule = rules[j].rhs; *rule >= 0; rule++)
-           if (*rule == token_translations[i])
+       for (r = 1; r < nrules + 1; r++)
+         for (rule = rules[r].rhs; *rule >= 0; rule++)
+           if (item_number_as_symbol_number (*rule) == token_translations[i])

              {
                END_TEST (65);
              {
                END_TEST (65);

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

                break;
              }
        fprintf (out, "%s\n", buffer);
                break;
              }
        fprintf (out, "%s\n", buffer);


@@ -410,13 +411,15 @@ print_grammar (FILE *out)
   for (i = ntokens; i < nsyms; i++)
     {
       int left_count = 0, right_count = 0;
   for (i = ntokens; i < nsyms; i++)
     {
       int left_count = 0, right_count = 0;

+      int r;
+      const char *tag = symbol_tag_get (symbols[i]);

 
 

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

        {
        {

-         if (rules[j].lhs == i)
+         if (rules[r].lhs->number == i)

            left_count++;
            left_count++;

-         for (rule = rules[j].rhs; *rule >= 0; rule++)
-           if (*rule == i)
+         for (rule = rules[r].rhs; *rule >= 0; rule++)
+           if (item_number_as_symbol_number (*rule) == i)

              {
                right_count++;
                break;
              {
                right_count++;
                break;


@@ -424,8 +427,8 @@ print_grammar (FILE *out)
        }
 
       buffer[0] = 0;
        }
 
       buffer[0] = 0;

-      fputs (escape (symbols[i]->tag), out);
-      column = strlen (escape (symbols[i]->tag));
+      fputs (tag, out);
+      column = strlen (tag);

       sprintf (buffer, " (%d)", i);
       END_TEST (0);
 
       sprintf (buffer, " (%d)", i);
       END_TEST (0);
 


@@ -434,11 +437,11 @@ print_grammar (FILE *out)
          END_TEST (50);
          sprintf (buffer + strlen (buffer), _(" on left:"));
 
          END_TEST (50);
          sprintf (buffer + strlen (buffer), _(" on left:"));
 

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

            {
              END_TEST (65);
            {
              END_TEST (65);

-             if (rules[j].lhs == i)
-               sprintf (buffer + strlen (buffer), " %d", j - 1);
+             if (rules[r].lhs->number == i)
+               sprintf (buffer + strlen (buffer), " %d", r - 1);

            }
        }
 
            }
        }
 


@@ -448,13 +451,13 @@ 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 (j = 1; j < nrules + 1; j++)
+         for (r = 1; r < nrules + 1; r++)

            {
            {

-             for (rule = rules[j].rhs; *rule >= 0; rule++)
-               if (*rule == i)
+             for (rule = rules[r].rhs; *rule >= 0; rule++)
+               if (item_number_as_symbol_number (*rule) == i)

                  {
                    END_TEST (65);
                  {
                    END_TEST (65);

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

                    break;
                  }
            }
                    break;
                  }
            }


@@ -473,22 +476,14 @@ print_results (void)
      that conflicts with Posix.  */
   FILE *out = xfopen (spec_verbose_file, "w");
 
      that conflicts with Posix.  */
   FILE *out = xfopen (spec_verbose_file, "w");
 

-  size_t size = obstack_object_size (&output_obstack);
-  fwrite (obstack_finish (&output_obstack), 1, size, out);
-  obstack_free (&output_obstack, NULL);
-
-  if (size)
-    fputs ("\n\n", out);
-

   reduce_output (out);
   conflicts_output (out);
 
   print_grammar (out);
 
   reduce_output (out);
   conflicts_output (out);
 
   print_grammar (out);
 

-  /* New experimental feature: output all the items of a state, not
-     only its kernel.  Requires to run closure, which need memory
-     allocation/deallocation.  */
-  if (trace_flag)
+  /* If the whole state item sets, not only the kernels, are wanted,
+     `closure' will be run, which needs memory allocation/deallocation.   */
+  if (report_flag & report_itemsets)

     new_closure (nritems);
   /* Storage for print_reductions.  */
   shiftset =  bitset_create (ntokens, BITSET_FIXED);
     new_closure (nritems);
   /* Storage for print_reductions.  */
   shiftset =  bitset_create (ntokens, BITSET_FIXED);


@@ -497,7 +492,7 @@ print_results (void)
     print_state (out, states[i]);
   bitset_free (shiftset);
   bitset_free (lookaheadset);
     print_state (out, states[i]);
   bitset_free (shiftset);
   bitset_free (lookaheadset);

-  if (trace_flag)
+  if (report_flag & report_itemsets)

     free_closure ();
 
   xfclose (out);
     free_closure ();
 
   xfclose (out);