(yyremoveDeletes, yy_reduce_print, yyglrReduce, yyreportTree): Do not

[bison.git] / src / output.c

diff --git a/src/output.c b/src/output.c
index 65a7d5b294fa1d9a3c969d01e67db74beaa12f5a..90adafb9068ab9163a13a46287bb0521cf059626 100644 (file)
--- a/src/output.c
+++ b/src/output.c
@@ -1,5 +1,6 @@
-/* Output the generated parsing program for bison,
-   Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
+/* Output the generated parsing program for Bison.
+
+   Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003

    Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
    Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.


@@ -20,932 +21,480 @@
    02111-1307, USA.  */
 
 
    02111-1307, USA.  */
 
 

-/* The parser tables consist of these tables.  Marked ones needed only
-   for the semantic parser.  Double marked are output only if switches
-   are set.
-
-   YYTRANSLATE = vector mapping yylex's token numbers into bison's
-   token numbers.
-
-   ++ YYTNAME = vector of string-names indexed by bison token number.
-
-   ++ YYTOKNUM = vector of yylex token numbers corresponding to
-   entries in YYTNAME.
-
-   YYRLINE = vector of line-numbers of all rules.  For yydebug
-   printouts.
-
-   YYRHS = vector of items of all rules.  This is exactly what RITEMS
-   contains.  For yydebug and for semantic parser.
-
-   YYPRHS[R] = index in YYRHS of first item for rule R.
-
-   YYR1[R] = symbol number of symbol that rule R derives.
-
-   YYR2[R] = number of symbols composing right hand side of rule R.
-
-   + YYSTOS[S] = the symbol number of the symbol that leads to state
-   S.
-
-   YYDEFACT[S] = default rule to reduce with in state s, when YYTABLE
-   doesn't specify something else to do.  Zero means the default is an
-   error.
-
-   YYDEFGOTO[I] = default state to go to after a reduction of a rule
-   that generates variable NTOKENS + I, except when YYTABLE specifies
-   something else to do.
-
-   YYPACT[S] = index in YYTABLE of the portion describing state S.
-   The lookahead token's type is used to index that portion to find
-   out what to do.
-
-   If the value in YYTABLE is positive, we shift the token and go to
-   that state.
-
-   If the value is negative, it is minus a rule number to reduce by.
-
-   If the value is zero, the default action from YYDEFACT[S] is used.
-
-   YYPGOTO[I] = the index in YYTABLE of the portion describing what to
-   do after reducing a rule that derives variable I + NTOKENS.  This
-   portion is indexed by the parser state number, S, as of before the
-   text for this nonterminal was read.  The value from YYTABLE is the
-   state to go to if the corresponding value in YYCHECK is S.
-
-   YYTABLE = a vector filled with portions for different uses, found
-   via YYPACT and YYPGOTO.
-
-   YYCHECK = a vector indexed in parallel with YYTABLE.  It indicates,
-   in a roundabout way, the bounds of the portion you are trying to
-   examine.
-
-   Suppose that the portion of yytable starts at index P and the index
-   to be examined within the portion is I.  Then if YYCHECK[P+I] != I,
-   I is outside the bounds of what is actually allocated, and the
-   default (from YYDEFACT or YYDEFGOTO) should be used.  Otherwise,
-   YYTABLE[P+I] should be used.
+#include "system.h"

 
 

-   YYFINAL = the state number of the termination state.  YYFLAG = most
-   negative short int.  Used to flag ??  */
+#include <error.h>
+#include <get-errno.h>
+#include <quotearg.h>
+#include <subpipe.h>
+#include <timevar.h>

 
 

-#include "system.h"
-#include "quotearg.h"
-#include "error.h"
-#include "getargs.h"
+#include "complain.h"

 #include "files.h"
 #include "files.h"

+#include "getargs.h"

 #include "gram.h"
 #include "gram.h"

-#include "LR0.h"
-#include "complain.h"
+#include "muscle_tab.h"

 #include "output.h"
 #include "output.h"

-#include "lalr.h"

 #include "reader.h"
 #include "symtab.h"
 #include "reader.h"
 #include "symtab.h"

-#include "conflicts.h"
-#include "muscle_tab.h"
-
-/* From lib/readpipe.h.  */
-FILE *readpipe PARAMS ((const char *, ...));
+#include "tables.h"

 
 /* From src/scan-skel.l. */
 
 /* From src/scan-skel.l. */

-int skel_lex PARAMS ((void));
-extern FILE *skel_in;
-
-static int nvectors;
-static int nentries;
-static short **froms = NULL;
-static short **tos = NULL;
-static short *tally = NULL;
-static short *width = NULL;
-static short *actrow = NULL;
-static short *state_count = NULL;
-static short *order = NULL;
-static short *base = NULL;
-static short *pos = NULL;
-static short *table = NULL;
-static short *check = NULL;
-static int lowzero;
-static int high;
-
-struct obstack muscle_obstack;
-static struct obstack format_obstack;
+void scan_skel (FILE *);

 
 

-int error_verbose = 0;

 
 

-/* Returns the number of lines of S.  */
-size_t
-get_lines_number (const char *s)
-{
-  size_t lines = 0;
+static struct obstack format_obstack;

 
 

-  size_t i;
-  for (i = 0; s[i]; ++i)
-    if (s[i] == '\n')
-      ++lines;
+bool error_verbose = false;

 
 

-  return lines;
-}

 
 
 
 

-/* FIXME. */
+/*-------------------------------------------------------------------.
+| Create a function NAME which associates to the muscle NAME the     |
+| result of formatting the FIRST and then TABLE_DATA[BEGIN..END[ (of |
+| TYPE), and to the muscle NAME_max, the max value of the            |
+| TABLE_DATA.                                                        |
+`-------------------------------------------------------------------*/

 
 

-static inline void
-output_table_data (struct obstack *oout,
-                  short *table_data,
-                  short first,
-                  int begin,
-                  int end)
-{
-  int i;
-  int j = 1;

 
 

-  obstack_fgrow1 (oout, "%6d", first);
-  for (i = begin; i < end; ++i)
-    {
-      obstack_1grow (oout, ',');
-      if (j >= 10)
-       {
-         obstack_sgrow (oout, "\n  ");
-         j = 1;
-       }
-      else
-       ++j;
-      obstack_fgrow1 (oout, "%6d", table_data[i]);
-    }
-  obstack_1grow (oout, 0);
+#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type)                       \
+                                                                       \
+static void                                                            \
+Name (const char *name,                                                        \
+      Type *table_data,                                                        \
+      Type first,                                                      \
+      int begin,                                                       \
+      int end)                                                         \
+{                                                                      \
+  Type min = first;                                                    \
+  Type max = first;                                                    \
+  long int lmin;                                                       \
+  long int lmax;                                                       \
+  int i;                                                               \
+  int j = 1;                                                           \
+                                                                       \
+  obstack_fgrow1 (&format_obstack, "%6d", first);                      \
+  for (i = begin; i < end; ++i)                                                \
+    {                                                                  \
+      obstack_1grow (&format_obstack, ',');                            \
+      if (j >= 10)                                                     \
+       {                                                               \
+         obstack_sgrow (&format_obstack, "\n  ");                      \
+         j = 1;                                                        \
+       }                                                               \
+      else                                                             \
+       ++j;                                                            \
+      obstack_fgrow1 (&format_obstack, "%6d", table_data[i]);          \
+      if (table_data[i] < min)                                         \
+       min = table_data[i];                                            \
+      if (max < table_data[i])                                         \
+       max = table_data[i];                                            \
+    }                                                                  \
+  obstack_1grow (&format_obstack, 0);                                  \
+  muscle_insert (name, obstack_finish (&format_obstack));              \
+                                                                       \
+  lmin = min;                                                          \
+  lmax = max;                                                          \
+  /* Build `NAME_min' and `NAME_max' in the obstack. */                        \
+  obstack_fgrow1 (&format_obstack, "%s_min", name);                    \
+  obstack_1grow (&format_obstack, 0);                                  \
+  MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmin);     \
+  obstack_fgrow1 (&format_obstack, "%s_max", name);                    \
+  obstack_1grow (&format_obstack, 0);                                  \
+  MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmax);     \

 }
 
 }
 

+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_unsigned_int_table, unsigned int)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_int_table, int)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_short_table, short)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_base_table, base_number)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_rule_number_table, rule_number)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_symbol_number_table, symbol_number)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_item_number_table, item_number)
+GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number)

 
 

-static void
-output_token_translations (void)
-{
-  output_table_data (&format_obstack, token_translations,
-                    0, 1, max_user_token_number + 1);
-  muscle_insert ("translate", obstack_finish (&format_obstack));
-  XFREE (token_translations);
-}

 
 

+/*----------------------------------------------------------------------.
+| Print to OUT a representation of FILENAME escaped both for C and M4.  |
+`----------------------------------------------------------------------*/

 
 static void
 
 static void

-output_gram (void)
+escaped_file_name_output (FILE *out, char const *filename)

 {
 {

-  {
-    int i;
-    short *values = XCALLOC (short, nrules + 1);
-    for (i = 0; i < nrules + 1; ++i)
-      values[i] = rules[i].rhs;
-    output_table_data (&format_obstack, values,
-                      0, 1, nrules + 1);
-    XFREE (values);
-  }
+  char const *p;
+  fprintf (out, "[[");

 
 

-  muscle_insert ("prhs", obstack_finish (&format_obstack));
-
-  {
-    short *yyrhs;
-    int i;
-
-    yyrhs = XMALLOC (short, nritems);
-
-    for (i = 1; i < nritems; ++i)
-      yyrhs[i] = ritem[i] >= 0 ? ritem[i] : -1;
-
-    output_table_data (&format_obstack, yyrhs,
-                      ritem[0], 1, nritems);
-    muscle_insert ("rhs", obstack_finish (&format_obstack));
-
-    XFREE (yyrhs);
-  }
+  for (p = quotearg_style (c_quoting_style, filename); *p; p++)
+    switch (*p)
+      {
+      case '$': fputs ("$][", out); break;
+      case '@': fputs ("@@",  out); break;
+      case '[': fputs ("@{",  out); break;
+      case ']': fputs ("@}",  out); break;
+      default: fputc (*p, out); break;
+      }

 
 

-#if 0
-  if (!semantic_parser)
-    obstack_sgrow (&table_obstack, "\n#endif\n");
-#endif
+  fprintf (out, "]]");

 }
 
 
 }
 
 

-static void
-output_stos (void)
-{
-  int i;
-  short *values = (short *) alloca (sizeof (short) * nstates);
-  for (i = 0; i < nstates; ++i)
-    values[i] = states[i]->accessing_symbol;
-  output_table_data (&format_obstack, values,
-                    0, 1, nstates);
-  muscle_insert ("stos", obstack_finish (&format_obstack));
-}
-
+/*------------------------------------------------------------------.
+| Prepare the muscles related to the symbols: translate, tname, and |
+| toknum.                                                           |
+`------------------------------------------------------------------*/

 
 static void
 
 static void

-output_rule_data (void)
+prepare_symbols (void)

 {
 {

-  int i;
-  int j;
-  short *short_tab = NULL;
-
-  {
-    short *values = XCALLOC (short, nrules + 1);
-    for (i = 0; i < nrules + 1; ++i)
-      values[i] = rules[i].line;
-    output_table_data (&format_obstack, values,
-                      0, 1, nrules + 1);
-    muscle_insert ("rline", obstack_finish (&format_obstack));
-    XFREE (values);
-  }
+  MUSCLE_INSERT_INT ("tokens_number", ntokens);
+  MUSCLE_INSERT_INT ("nterms_number", nvars);
+  MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
+  MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number);

 
 

+  muscle_insert_symbol_number_table ("translate",
+                                    token_translations,
+                                    token_translations[0],
+                                    1, max_user_token_number + 1);

 
 

-  j = 0;
-  for (i = 0; i < nsyms; i++)
-    {
-      /* Be sure not to use twice the same quotearg slot. */
-      const char *cp =
-       quotearg_n_style (1, c_quoting_style,
-                         quotearg_style (escape_quoting_style, symbols[i]->tag));
-      /* Width of the next token, including the two quotes, the coma
-        and the space.  */
-      int strsize = strlen (cp) + 2;
-
-      if (j + strsize > 75)
-       {
-         obstack_sgrow (&format_obstack, "\n  ");
-         j = 2;
-       }
-
-      obstack_sgrow (&format_obstack, cp);
-      obstack_sgrow (&format_obstack, ", ");
-      j += strsize;
-    }
-  /* Add a NULL entry to list of tokens (well, 0, as NULL might not be
-     defined).  */
-  obstack_sgrow (&format_obstack, "0");
+  /* tname -- token names.  */
+  {
+    int i;
+    /* We assume that the table will be output starting at column 2. */
+    int j = 2;
+    for (i = 0; i < nsyms; i++)
+      {
+       const char *cp = quotearg_style (c_quoting_style, symbols[i]->tag);
+       /* Width of the next token, including the two quotes, the
+          comma and the space.  */
+       int width = strlen (cp) + 2;
+
+       if (j + width > 75)
+         {
+           obstack_sgrow (&format_obstack, "\n ");
+           j = 1;
+         }
+
+       if (i)
+         obstack_1grow (&format_obstack, ' ');
+       MUSCLE_OBSTACK_SGROW (&format_obstack, cp);
+       obstack_1grow (&format_obstack, ',');
+       j += width;
+      }
+    /* Add a NULL entry to list of tokens (well, 0, as NULL might not be
+       defined).  */
+    obstack_sgrow (&format_obstack, " 0");

 
 

-  /* Finish table and store. */
-  obstack_1grow (&format_obstack, 0);
-  muscle_insert ("tname", obstack_finish (&format_obstack));
+    /* Finish table and store. */
+    obstack_1grow (&format_obstack, 0);
+    muscle_insert ("tname", obstack_finish (&format_obstack));
+  }

 
   /* Output YYTOKNUM. */
   {
 
   /* Output YYTOKNUM. */
   {

-    short *values = XCALLOC (short, ntokens + 1);
-    for (i = 0; i < ntokens + 1; ++i)
+    int i;
+    int *values = MALLOC (values, ntokens);
+    for (i = 0; i < ntokens; ++i)

       values[i] = symbols[i]->user_token_number;
       values[i] = symbols[i]->user_token_number;

-    output_table_data (&format_obstack, values,
-                      0, 1, ntokens + 1);
-    muscle_insert ("toknum", obstack_finish (&format_obstack));
-    XFREE (values);
-  }
-
-
-  /* Output YYR1. */
-  {
-    short *values = XCALLOC (short, nrules + 1);
-    for (i = 0; i < nrules + 1; ++i)
-      values[i] = rules[i].lhs;
-    output_table_data (&format_obstack, values,
-                      0, 1, nrules + 1);
-    muscle_insert ("r1", obstack_finish (&format_obstack));
-    XFREE (values);
+    muscle_insert_int_table ("toknum", values,
+                            values[0], 1, ntokens);
+    free (values);

   }
   }

-
-  /* Output YYR2. */
-  short_tab = XMALLOC (short, nrules + 1);
-  for (i = 1; i < nrules; i++)
-    short_tab[i] = rules[i + 1].rhs - rules[i].rhs - 1;
-  short_tab[nrules] =  nritems - rules[nrules].rhs - 1;
-  output_table_data (&format_obstack, short_tab,
-                    0, 1, nrules + 1);
-  muscle_insert ("r2", obstack_finish (&format_obstack));
-  XFREE (short_tab);

 }
 
 }
 

-/*------------------------------------------------------------------.
-| Decide what to do for each type of token if seen as the lookahead |
-| token in specified state.  The value returned is used as the      |
-| default action (yydefact) for the state.  In addition, actrow is  |
-| filled with what to do for each kind of token, index by symbol    |
-| number, with zero meaning do the default action.  The value       |
-| MINSHORT, a very negative number, means this situation is an      |
-| error.  The parser recognizes this value specially.               |
-|                                                                   |
-| This is where conflicts are resolved.  The loop over lookahead    |
-| rules considered lower-numbered rules last, and the last rule     |
-| considered that likes a token gets to handle it.                  |
-`------------------------------------------------------------------*/

 
 

-static int
-action_row (state_t *state)
-{
-  int i;
-  int default_rule = 0;
-  reductions *redp = state->reductions;
-  shifts *shiftp = state->shifts;
-  errs *errp = state->errs;
-  /* set nonzero to inhibit having any default reduction */
-  int nodefault = 0;
+/*-------------------------------------------------------------.
+| Prepare the muscles related to the rules: rhs, prhs, r1, r2, |
+| rline, dprec, merger.                                        |
+`-------------------------------------------------------------*/

 
 

-  for (i = 0; i < ntokens; i++)
-    actrow[i] = 0;
-
-  if (redp->nreds >= 1)
+static void
+prepare_rules (void)
+{
+  rule_number r;
+  unsigned int i = 0;
+  item_number *rhs = MALLOC (rhs, nritems);
+  unsigned int *prhs = MALLOC (prhs, nrules);
+  unsigned int *rline = MALLOC (rline, nrules);
+  symbol_number *r1 = MALLOC (r1, nrules);
+  unsigned int *r2 = MALLOC (r2, nrules);
+  short *dprec = MALLOC (dprec, nrules);
+  short *merger = MALLOC (merger, nrules);
+
+  for (r = 0; r < nrules; ++r)

     {
     {

-      int j;
-      /* loop over all the rules available here which require
-        lookahead */
-      for (i = state->nlookaheads - 1; i >= 0; --i)
-       /* and find each token which the rule finds acceptable
-          to come next */
-       for (j = 0; j < ntokens; j++)
-         /* and record this rule as the rule to use if that
-            token follows.  */
-         if (BITISSET (LA (state->lookaheadsp + i), j))
-           actrow[j] = -LAruleno[state->lookaheadsp + i];
-    }
-
-  /* Now see which tokens are allowed for shifts in this state.  For
-     them, record the shift as the thing to do.  So shift is preferred
-     to reduce.  */
-  for (i = 0; i < shiftp->nshifts; i++)
-    {
-      int symbol;
-      int shift_state = shiftp->shifts[i];
-      if (!shift_state)
-       continue;
-
-      symbol = states[shift_state]->accessing_symbol;
-
-      if (ISVAR (symbol))
-       break;
-
-      actrow[symbol] = shift_state;
-
-      /* Do not use any default reduction if there is a shift for
-        error */
-      if (symbol == error_token_number)
-       nodefault = 1;
+      item_number *rhsp = NULL;
+      /* Index of rule R in RHS. */
+      prhs[r] = i;
+      /* RHS of the rule R. */
+      for (rhsp = rules[r].rhs; *rhsp >= 0; ++rhsp)
+       rhs[i++] = *rhsp;
+      /* LHS of the rule R. */
+      r1[r] = rules[r].lhs->number;
+      /* Length of rule R's RHS. */
+      r2[r] = i - prhs[r];
+      /* Separator in RHS. */
+      rhs[i++] = -1;
+      /* Line where rule was defined. */
+      rline[r] = rules[r].location.start.line;
+      /* Dynamic precedence (GLR).  */
+      dprec[r] = rules[r].dprec;
+      /* Merger-function index (GLR).  */
+      merger[r] = rules[r].merger;

     }
     }

+  if (i != nritems)
+    abort ();
+
+  muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems);
+  muscle_insert_unsigned_int_table ("prhs", prhs, 0, 0, nrules);
+  muscle_insert_unsigned_int_table ("rline", rline, 0, 0, nrules);
+  muscle_insert_symbol_number_table ("r1", r1, 0, 0, nrules);
+  muscle_insert_unsigned_int_table ("r2", r2, 0, 0, nrules);
+  muscle_insert_short_table ("dprec", dprec, 0, 0, nrules);
+  muscle_insert_short_table ("merger", merger, 0, 0, nrules);
+
+  MUSCLE_INSERT_INT ("rules_number", nrules);
+  MUSCLE_INSERT_INT ("max_left_semantic_context", max_left_semantic_context);
+
+  free (rhs);
+  free (prhs);
+  free (rline);
+  free (r1);
+  free (r2);
+  free (dprec);
+  free (merger);
+}

 
 

-  /* See which tokens are an explicit error in this state (due to
-     %nonassoc).  For them, record MINSHORT as the action.  */
-  for (i = 0; i < errp->nerrs; i++)
-    {
-      int symbol = errp->errs[i];
-      actrow[symbol] = MINSHORT;
-    }
+/*--------------------------------------------.
+| Prepare the muscles related to the states.  |
+`--------------------------------------------*/

 
 

-  /* Now find the most common reduction and make it the default action
-     for this state.  */
+static void
+prepare_states (void)
+{
+  state_number i;
+  symbol_number *values = MALLOC (values, nstates);
+  for (i = 0; i < nstates; ++i)
+    values[i] = states[i]->accessing_symbol;
+  muscle_insert_symbol_number_table ("stos", values,
+                                    0, 1, nstates);
+  free (values);

 
 

-  if (redp->nreds >= 1 && !nodefault)
-    {
-      if (state->consistent)
-       default_rule = redp->rules[0];
-      else
-       {
-         int max = 0;
-         for (i = 0; i < state->nlookaheads; i++)
-           {
-             int count = 0;
-             int rule = -LAruleno[state->lookaheadsp + i];
-             int j;
-
-             for (j = 0; j < ntokens; j++)
-               if (actrow[j] == rule)
-                 count++;
-
-             if (count > max)
-               {
-                 max = count;
-                 default_rule = rule;
-               }
-           }
-
-         /* actions which match the default are replaced with zero,
-            which means "use the default" */
-
-         if (max > 0)
-           {
-             int j;
-             for (j = 0; j < ntokens; j++)
-               if (actrow[j] == default_rule)
-                 actrow[j] = 0;
-
-             default_rule = -default_rule;
-           }
-       }
-    }
+  MUSCLE_INSERT_INT ("last", high);
+  MUSCLE_INSERT_INT ("final_state_number", final_state->number);
+  MUSCLE_INSERT_INT ("states_number", nstates);
+}

 
 

-  /* If have no default rule, the default is an error.
-     So replace any action which says "error" with "use default".  */

 
 

-  if (default_rule == 0)
-    for (i = 0; i < ntokens; i++)
-      if (actrow[i] == MINSHORT)
-       actrow[i] = 0;
-
-  return default_rule;
-}

 
 

+/*---------------------------------.
+| Output the user actions to OUT.  |
+`---------------------------------*/

 
 static void
 
 static void

-save_row (int state)
+user_actions_output (FILE *out)

 {
 {

-  int i;
-  int count;
-  short *sp;
-  short *sp1;
-  short *sp2;
-
-  count = 0;
-  for (i = 0; i < ntokens; i++)
-    if (actrow[i] != 0)
-      count++;
-
-  if (count == 0)
-    return;
-
-  froms[state] = sp1 = sp = XCALLOC (short, count);
-  tos[state] = sp2 = XCALLOC (short, count);
+  rule_number r;

 
 

-  for (i = 0; i < ntokens; i++)
-    if (actrow[i] != 0)
+  fputs ("m4_define([b4_actions], \n[[", out);
+  for (r = 0; r < nrules; ++r)
+    if (rules[r].action)

       {
       {

-       *sp1++ = i;
-       *sp2++ = actrow[i];
+       fprintf (out, "  case %d:\n", r + 1);
+
+       fprintf (out, "]b4_syncline([[%d]], ",
+                rules[r].action_location.start.line);
+       escaped_file_name_output (out, rules[r].action_location.start.file);
+       fprintf (out, ")[\n");
+       fprintf (out, "    %s\n    break;\n\n",
+                rules[r].action);

       }
       }

-
-  tally[state] = count;
-  width[state] = sp1[-1] - sp[0] + 1;
+  fputs ("]])\n\n", out);

 }
 
 }
 

-
-/*------------------------------------------------------------------.
-| Figure out the actions for the specified state, indexed by        |
-| lookahead token type.                                             |
-|                                                                   |
-| The YYDEFACT table is output now.  The detailed info is saved for |
-| putting into YYTABLE later.                                       |
-`------------------------------------------------------------------*/
+/*--------------------------------------.
+| Output the merge functions to OUT.   |
+`--------------------------------------*/

 
 static void
 
 static void

-token_actions (void)
+merger_output (FILE *out)

 {
 {

-  int i;
-  short *yydefact = XCALLOC (short, nstates);
+  int n;
+  merger_list* p;

 
 

-  actrow = XCALLOC (short, ntokens);
-  for (i = 0; i < nstates; ++i)
+  fputs ("m4_define([b4_mergers], \n[[", out);
+  for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next)

     {
     {

-      yydefact[i] = action_row (states[i]);
-      save_row (i);
+      if (p->type[0] == '\0')
+       fprintf (out, "  case %d: yyval = %s (*yy0, *yy1); break;\n",
+                n, p->name);
+      else
+       fprintf (out, "  case %d: yyval.%s = %s (*yy0, *yy1); break;\n",
+                n, p->type, p->name);

     }
     }

-
-  output_table_data (&format_obstack, yydefact,
-                    yydefact[0], 1, nstates);
-  muscle_insert ("defact", obstack_finish (&format_obstack));
-
-  XFREE (actrow);
-  XFREE (yydefact);
-}
-
-
-/*-----------------------------.
-| Output the actions to OOUT.  |
-`-----------------------------*/
-
-void
-actions_output (FILE *out)
-{
-  int rule;
-  for (rule = 1; rule < nrules + 1; ++rule)
-    if (rules[rule].action)
-      {
-       fprintf (out, "  case %d:\n", rule);
-
-       if (!no_lines_flag)
-         fprintf (out, muscle_find ("linef"),
-                  rules[rule].action_line,
-                  quotearg_style (c_quoting_style,
-                                  muscle_find ("filename")));
-       /* As a Bison extension, add the ending semicolon.  Since some
-          Yacc don't do that, help people using bison as a Yacc
-          finding their missing semicolons.  */
-       fprintf (out, "{ %s%s }\n    break;\n\n",
-                rules[rule].action,
-                yacc_flag ? ";" : "");
-      }
-}
-
-
-/*----------------------------.
-| Output the guards to OOUT.  |
-`----------------------------*/
-
-void
-guards_output (FILE *out)
-{
-  int rule;
-  for (rule = 1; rule < nrules + 1; ++rule)
-    if (rules[rule].guard)
-      {
-       fprintf (out, "  case %d:\n", rule);
-
-       if (!no_lines_flag)
-         fprintf (out, muscle_find ("linef"),
-                  rules[rule].guard_line,
-                  quotearg_style (c_quoting_style,
-                                  muscle_find ("filename")));
-       fprintf (out, "{ %s; }\n    break;\n\n",
-                rules[rule].guard);
-      }
+  fputs ("]])\n\n", out);

 }
 
 }
 

+/*--------------------------------------.
+| Output the tokens definition to OUT.  |
+`--------------------------------------*/

 
 

-/*---------------------------------------.
-| Output the tokens definition to OOUT.  |
-`---------------------------------------*/
-
-void
+static void

 token_definitions_output (FILE *out)
 {
   int i;
 token_definitions_output (FILE *out)
 {
   int i;

+  char const *sep = "";
+
+  fputs ("m4_define([b4_tokens], \n[", out);

   for (i = 0; i < ntokens; ++i)
     {
   for (i = 0; i < ntokens; ++i)
     {

-      bucket *symbol = symbols[i];
-      int number = symbol->user_token_number;
+      symbol *sym = symbols[i];
+      int number = sym->user_token_number;
+
+      /* At this stage, if there are literal aliases, they are part of
+        SYMBOLS, so we should not find symbols which are the aliases
+        here.  */
+      if (number == USER_NUMBER_ALIAS)
+       abort ();

 
 

-      if (number == SALIAS)
-       continue;

       /* Skip error token.  */
       /* Skip error token.  */

-      if (symbol->value == error_token_number)
+      if (sym == errtoken)
+       continue;
+
+      /* If this string has an alias, then it is necessarily the alias
+        which is to be output.  */
+      if (sym->alias)
+       sym = sym->alias;
+
+      /* Don't output literal chars or strings (when defined only as a
+        string).  Note that must be done after the alias resolution:
+        think about `%token 'f' "f"'.  */
+      if (sym->tag[0] == '\'' || sym->tag[0] == '\"')

        continue;
        continue;

-      if (symbol->tag[0] == '\'')
-       continue;               /* skip literal character */
-      if (symbol->tag[0] == '\"')
-       {
-         /* use literal string only if given a symbol with an alias */
-         if (symbol->alias)
-           symbol = symbol->alias;
-         else
-           continue;
-       }

 
       /* Don't #define nonliteral tokens whose names contain periods
         or '$' (as does the default value of the EOF token).  */
 
       /* Don't #define nonliteral tokens whose names contain periods
         or '$' (as does the default value of the EOF token).  */

-      if (strchr (symbol->tag, '.') || strchr (symbol->tag, '$'))
+      if (strchr (sym->tag, '.') || strchr (sym->tag, '$'))

        continue;
 
        continue;
 

-      fprintf (out, "# define %s\t%d\n",
-              symbol->tag, number);
-      if (semantic_parser)
-       /* FIXME: This is probably wrong, and should be just as
-          above. --akim.  */
-       fprintf (out, "# define T%s\t%d\n", symbol->tag, symbol->value);
+      fprintf (out, "%s[[[%s]], [%d]]",
+              sep, sym->tag, number);
+      sep = ",\n";

     }
     }

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

 }
 
 
 }
 
 

-static void
-save_column (int symbol, int default_state)
-{
-  int i;
-  short *sp;
-  short *sp1;
-  short *sp2;
-  int count;
-  int symno = symbol - ntokens + nstates;
-
-  short begin = goto_map[symbol];
-  short end = goto_map[symbol + 1];
-
-  count = 0;
-  for (i = begin; i < end; i++)
-    if (to_state[i] != default_state)
-      count++;
-
-  if (count == 0)
-    return;
-
-  froms[symno] = sp1 = sp = XCALLOC (short, count);
-  tos[symno] = sp2 = XCALLOC (short, count);
-
-  for (i = begin; i < end; i++)
-    if (to_state[i] != default_state)
-      {
-       *sp1++ = from_state[i];
-       *sp2++ = to_state[i];
-      }
-
-  tally[symno] = count;
-  width[symno] = sp1[-1] - sp[0] + 1;
-}
+/*---------------------------------------.
+| Output the symbol destructors to OUT.  |
+`---------------------------------------*/

 
 

-static int
-default_goto (int symbol)
+static void
+symbol_destructors_output (FILE *out)

 {
   int i;
 {
   int i;

-  int m = goto_map[symbol];
-  int n = goto_map[symbol + 1];
-  int default_state = -1;
-  int max = 0;
-
-  if (m == n)
-    return -1;
+  char const *sep = "";

 
 

-  for (i = 0; i < nstates; i++)
-    state_count[i] = 0;
-
-  for (i = m; i < n; i++)
-    state_count[to_state[i]]++;
-
-  for (i = 0; i < nstates; i++)
-    if (state_count[i] > max)
+  fputs ("m4_define([b4_symbol_destructors], \n[", out);
+  for (i = 0; i < nsyms; ++i)
+    if (symbols[i]->destructor)

       {
       {

-       max = state_count[i];
-       default_state = i;
+       symbol *sym = symbols[i];
+
+       /* Filename, lineno,
+          Symbol-name, Symbol-number,
+          destructor, typename. */
+       fprintf (out, "%s[", sep);
+       sep = ",\n";
+       escaped_file_name_output (out, sym->destructor_location.start.file);
+       fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
+                sym->destructor_location.start.line,
+                sym->tag,
+                sym->number,
+                sym->destructor,
+                sym->type_name);

       }
       }

-
-  return default_state;
+  fputs ("])\n\n", out);

 }
 
 
 }
 
 

-/*-------------------------------------------------------------------.
-| Figure out what to do after reducing with each rule, depending on  |
-| the saved state from before the beginning of parsing the data that |
-| matched this rule.                                                 |
-|                                                                    |
-| The YYDEFGOTO table is output now.  The detailed info is saved for |
-| putting into YYTABLE later.                                        |
-`-------------------------------------------------------------------*/
+/*------------------------------------.
+| Output the symbol printers to OUT.  |
+`------------------------------------*/

 
 static void
 
 static void

-goto_actions (void)
+symbol_printers_output (FILE *out)

 {
   int i;
 {
   int i;

-  short *yydefgoto = XMALLOC (short, nsyms - ntokens);
-
-  state_count = XCALLOC (short, nstates);
-  for (i = ntokens; i < nsyms; ++i)
-    {
-      int default_state = default_goto (i);
-      save_column (i, default_state);
-      yydefgoto[i - ntokens] = default_state;
-    }
-
-  output_table_data (&format_obstack, yydefgoto,
-                    yydefgoto[0], 1, nsyms - ntokens);
-  muscle_insert ("defgoto", obstack_finish (&format_obstack));
-
-  XFREE (state_count);
-  XFREE (yydefgoto);
-}
-
-
-/* The next few functions decide how to pack the actions and gotos
-   information into yytable. */
+  char const *sep = "";

 
 

-static void
-sort_actions (void)
-{
-  int i;
-
-  order = XCALLOC (short, nvectors);
-  nentries = 0;
-
-  for (i = 0; i < nvectors; i++)
-    if (tally[i] > 0)
+  fputs ("m4_define([b4_symbol_printers], \n[", out);
+  for (i = 0; i < nsyms; ++i)
+    if (symbols[i]->printer)

       {
       {

-       int k;
-       int t = tally[i];
-       int w = width[i];
-       int j = nentries - 1;
-
-       while (j >= 0 && (width[order[j]] < w))
-         j--;
-
-       while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t))
-         j--;
-
-       for (k = nentries - 1; k > j; k--)
-         order[k + 1] = order[k];
-
-       order[j + 1] = i;
-       nentries++;
+       symbol *sym = symbols[i];
+
+       /* Filename, lineno,
+          Symbol-name, Symbol-number,
+          printer, typename. */
+       fprintf (out, "%s[", sep);
+       sep = ",\n";
+       escaped_file_name_output (out, sym->printer_location.start.file);
+       fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
+                sym->printer_location.start.line,
+                sym->tag,
+                sym->number,
+                sym->printer,
+                sym->type_name);

       }
       }

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

 }
 
 
 }
 
 

-static int
-matching_state (int vector)
-{
-  int i = order[vector];
-  int t;
-  int w;
-  int prev;
-
-  if (i >= nstates)
-    return -1;
-
-  t = tally[i];
-  w = width[i];
-
-  for (prev = vector - 1; prev >= 0; prev--)
-    {
-      int j = order[prev];
-      int k;
-      int match = 1;
-
-      if (width[j] != w || tally[j] != t)
-       return -1;
-
-      for (k = 0; match && k < t; k++)
-       if (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k])
-         match = 0;
-
-      if (match)
-       return j;
-    }
-
-  return -1;
-}
-
-
-static int
-pack_vector (int vector)
-{
-  int i = order[vector];
-  int j;
-  int t = tally[i];
-  int loc = 0;
-  short *from = froms[i];
-  short *to = tos[i];
-
-  assert (t);
-
-  for (j = lowzero - from[0]; j < MAXTABLE; j++)
-    {
-      int k;
-      int ok = 1;
-
-      for (k = 0; ok && k < t; k++)
-       {
-         loc = j + from[k];
-         if (loc > MAXTABLE)
-           fatal (_("maximum table size (%d) exceeded"), MAXTABLE);
-
-         if (table[loc] != 0)
-           ok = 0;
-       }
-
-      for (k = 0; ok && k < vector; k++)
-       if (pos[k] == j)
-         ok = 0;
-
-      if (ok)
-       {
-         for (k = 0; k < t; k++)
-           {
-             loc = j + from[k];
-             table[loc] = to[k];
-             check[loc] = from[k];
-           }
-
-         while (table[lowzero] != 0)
-           lowzero++;
-
-         if (loc > high)
-           high = loc;
-
-         return j;
-       }
-    }
-#define pack_vector_succeeded 0
-  assert (pack_vector_succeeded);
-  return 0;
-}
-
-
-static void
-pack_table (void)
-{
-  int i;
-  int place;
-  int state;
-
-  base = XCALLOC (short, nvectors);
-  pos = XCALLOC (short, nentries);
-  table = XCALLOC (short, MAXTABLE);
-  check = XCALLOC (short, MAXTABLE);
-
-  lowzero = 0;
-  high = 0;
-
-  for (i = 0; i < nvectors; i++)
-    base[i] = MINSHORT;
-
-  for (i = 0; i < MAXTABLE; i++)
-    check[i] = -1;
-
-  for (i = 0; i < nentries; i++)
-    {
-      state = matching_state (i);
-
-      if (state < 0)
-       place = pack_vector (i);
-      else
-       place = base[state];
-
-      pos[i] = place;
-      base[order[i]] = place;
-    }
-
-  for (i = 0; i < nvectors; i++)
-    {
-      XFREE (froms[i]);
-      XFREE (tos[i]);
-    }
-
-  XFREE (froms);
-  XFREE (tos);
-  XFREE (pos);
-}
-
-/* the following functions output yytable, yycheck
-   and the vectors whose elements index the portion starts */
-

 static void
 static void

-output_base (void)
+prepare_actions (void)

 {
 {

-  /* Output pact. */
-  output_table_data (&format_obstack, base,
-                    base[0], 1, nstates);
-  muscle_insert ("pact", obstack_finish (&format_obstack));
-
-  /* Output pgoto. */
-  output_table_data (&format_obstack, base,
-                    base[nstates], nstates + 1, nvectors);
-  muscle_insert ("pgoto", obstack_finish (&format_obstack));
-
-  XFREE (base);
-}
-
-
-static void
-output_table (void)
-{
-  output_table_data (&format_obstack, table,
-                    table[0], 1, high + 1);
-  muscle_insert ("table", obstack_finish (&format_obstack));
-  XFREE (table);
-}
-
-
-static void
-output_check (void)
-{
-  output_table_data (&format_obstack, check,
-                    check[0], 1, high + 1);
-  muscle_insert ("check", obstack_finish (&format_obstack));
-  XFREE (check);
-}
-
-/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable
-   and yycheck.  */
-
-static void
-output_actions (void)
-{
-  int i;
-  nvectors = nstates + nvars;
-
-  froms = XCALLOC (short *, nvectors);
-  tos = XCALLOC (short *, nvectors);
-  tally = XCALLOC (short, nvectors);
-  width = XCALLOC (short, nvectors);
-
-  token_actions ();
-  XFREE (LA);
-  XFREE (LAruleno);
-
-  goto_actions ();
-  XFREE (goto_map + ntokens);
-  XFREE (from_state);
-  XFREE (to_state);
-
-  sort_actions ();
-  pack_table ();
-
-  output_base ();
-  output_table ();
-
-  output_check ();
-
-  for (i = 0; i < nstates; ++i)
-    {
-      free (states[i]->shifts);
-      XFREE (states[i]->reductions);
-      free (states[i]->errs);
-      free (states[i]);
-    }
-  XFREE (states);
+  /* Figure out the actions for the specified state, indexed by
+     lookahead token type.  */
+
+  muscle_insert_rule_number_table ("defact", yydefact,
+                                  yydefact[0], 1, nstates);
+
+  /* Figure out what to do after reducing with each rule, depending on
+     the saved state from before the beginning of parsing the data
+     that matched this rule.  */
+  muscle_insert_state_number_table ("defgoto", yydefgoto,
+                                   yydefgoto[0], 1, nsyms - ntokens);
+
+
+  /* Output PACT. */
+  muscle_insert_base_table ("pact", base,
+                            base[0], 1, nstates);
+  MUSCLE_INSERT_INT ("pact_ninf", base_ninf);
+
+  /* Output PGOTO. */
+  muscle_insert_base_table ("pgoto", base,
+                            base[nstates], nstates + 1, nvectors);
+
+  muscle_insert_base_table ("table", table,
+                           table[0], 1, high + 1);
+  MUSCLE_INSERT_INT ("table_ninf", table_ninf);
+
+  muscle_insert_base_table ("check", check,
+                           check[0], 1, high + 1);
+
+  /* GLR parsing slightly modifies YYTABLE and YYCHECK (and thus
+     YYPACT) so that in states with unresolved conflicts, the default
+     reduction is not used in the conflicted entries, so that there is
+     a place to put a conflict pointer.
+
+     This means that YYCONFLP and YYCONFL are nonsense for a non-GLR
+     parser, so we could avoid accidents by not writing them out in
+     that case.  Nevertheless, it seems even better to be able to use
+     the GLR skeletons even without the non-deterministic tables.  */
+  muscle_insert_unsigned_int_table ("conflict_list_heads", conflict_table,
+                                   conflict_table[0], 1, high + 1);
+  muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list,
+                                   conflict_list[0], 1, conflict_list_cnt);

 }
 
 \f
 }
 
 \f


@@ -956,41 +505,70 @@ output_actions (void)
 static void
 output_skeleton (void)
 {
 static void
 output_skeleton (void)
 {

-  /* Store the definition of all the muscles. */
-  char *tempdir = getenv ("TMPDIR");
-  char *tempfile = NULL;
-  FILE *out = NULL;
-  ssize_t bytes_read;
-  int fd;
-
-  if (tempdir == NULL)
-    tempdir = DEFAULT_TMPDIR;
-  tempfile = xmalloc (strlen (tempdir) + 11);
-  sprintf (tempfile, "%s/bsnXXXXXX", tempdir);
-  fd = mkstemp (tempfile);
-  if (fd == -1)
-    error (EXIT_FAILURE, errno, "%s", tempfile);
-
-  out = fdopen (fd, "w");
-  if (out == NULL)
-    error (EXIT_FAILURE, errno, "%s", tempfile);
-
-  /* There are no comments, especially not `#': we do want M4 expansion
-     after `#': think of CPP macros!  */
-  fputs ("m4_changecom()\n", out);
+  FILE *in;
+  FILE *out;
+  int filter_fd[2];
+  char const *argv[6];
+  pid_t pid;
+
+  /* Compute the names of the package data dir and skeleton file.
+     Test whether m4sugar.m4 is readable, to check for proper
+     installation.  A faulty installation can cause deadlock, so a
+     cheap sanity check is worthwhile.  */
+  char const m4sugar[] = "m4sugar/m4sugar.m4";
+  char *full_m4sugar;
+  char *full_cm4;
+  char *full_path;
+  char const *p;
+  char const *m4 = (p = getenv ("M4")) ? p : M4;
+  char const *pkgdatadir = (p = getenv ("BISON_PKGDATADIR")) ? p : PKGDATADIR;
+  size_t skeleton_size = strlen (skeleton) + 1;
+  size_t pkgdatadirlen = strlen (pkgdatadir);
+  while (pkgdatadirlen && pkgdatadir[pkgdatadirlen - 1] == '/')
+    pkgdatadirlen--;
+  full_path = xmalloc (pkgdatadirlen + 1
+                      + (skeleton_size < sizeof m4sugar
+                         ? sizeof m4sugar : skeleton_size));
+  strcpy (full_path, pkgdatadir);
+  full_path[pkgdatadirlen] = '/';
+  strcpy (full_path + pkgdatadirlen + 1, m4sugar);
+  full_m4sugar = xstrdup (full_path);
+  strcpy (full_path + pkgdatadirlen + 1, "c.m4");
+  full_cm4 = xstrdup (full_path);
+  strcpy (full_path + pkgdatadirlen + 1, skeleton);
+  xfclose (xfopen (full_m4sugar, "r"));
+
+  /* Create an m4 subprocess connected to us via two pipes.  */
+
+  if (trace_flag & trace_tools)
+    fprintf (stderr, "running: %s %s - %s %s\n",
+            m4, full_m4sugar, full_cm4, full_path);
+
+  argv[0] = m4;
+  argv[1] = full_m4sugar;
+  argv[2] = "-";
+  argv[3] = full_cm4;
+  argv[4] = full_path;
+  argv[5] = NULL;
+
+  init_subpipe ();
+  pid = create_subpipe (argv, filter_fd);
+  free (full_m4sugar);
+  free (full_cm4);
+  free (full_path);
+
+  out = fdopen (filter_fd[0], "w");
+  if (! out)
+    error (EXIT_FAILURE, get_errno (), "fdopen");
+
+  /* Output the definitions of all the muscles.  */

   fputs ("m4_init()\n", out);
 
   fputs ("m4_init()\n", out);
 

-  fputs ("m4_define([b4_actions], \n[[", out);
-  actions_output (out);
-  fputs ("]])\n\n", out);
-
-  fputs ("m4_define([b4_guards], \n[[", out);
-  guards_output (out);
-  fputs ("]])\n\n", out);
-
-  fputs ("m4_define([b4_tokendef], \n[[", out);
+  user_actions_output (out);
+  merger_output (out);

   token_definitions_output (out);
   token_definitions_output (out);

-  fputs ("]])\n\n", out);
+  symbol_destructors_output (out);
+  symbol_printers_output (out);

 
   muscles_m4_output (out);
 
 
   muscles_m4_output (out);
 


@@ -998,137 +576,48 @@ output_skeleton (void)
   fputs ("m4_divert_push(0)dnl\n", out);
   xfclose (out);
 
   fputs ("m4_divert_push(0)dnl\n", out);
   xfclose (out);
 

-  /* Invoke m4 on the definition of the muscles, and the skeleton. */
-  {
-    const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
-    const char *m4 = getenv ("M4");
-    if (!m4)
-      m4 = M4;
-    if (!bison_pkgdatadir)
-      bison_pkgdatadir = PKGDATADIR;
-    if (trace_flag)
-      fprintf (stderr,
-              "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n",
-              m4, bison_pkgdatadir, tempfile, skeleton);
-    skel_in = readpipe (m4,
-                       "-I", bison_pkgdatadir,
-                       "m4sugar/m4sugar.m4",
-                       tempfile,
-                       skeleton,
-                       NULL);
-    if (!skel_in)
-      error (EXIT_FAILURE, errno, "cannot run m4");
-    skel_lex ();
-
-    /* If `debugging', keep this file alive. */
-    if (!trace_flag)
-      unlink (tempfile);
-  }
+  /* Read and process m4's output.  */
+  timevar_push (TV_M4);
+  in = fdopen (filter_fd[1], "r");
+  if (! in)
+    error (EXIT_FAILURE, get_errno (), "fdopen");
+  scan_skel (in);
+  xfclose (in);
+  reap_subpipe (pid, m4);
+  timevar_pop (TV_M4);

 }
 
 static void
 prepare (void)
 {
 }
 
 static void
 prepare (void)
 {

-  MUSCLE_INSERT_INT ("last", high);
-  MUSCLE_INSERT_INT ("flag", MINSHORT);
-  MUSCLE_INSERT_INT ("pure", pure_parser);
-  MUSCLE_INSERT_INT ("nsym", nsyms);
-  MUSCLE_INSERT_INT ("debug", debug_flag);
-  MUSCLE_INSERT_INT ("final", final_state);
-  MUSCLE_INSERT_INT ("maxtok", max_user_token_number);
-  MUSCLE_INSERT_INT ("error_verbose", error_verbose);
+  /* Flags. */
+  MUSCLE_INSERT_BOOL ("debug", debug_flag);
+  MUSCLE_INSERT_BOOL ("defines_flag", defines_flag);
+  MUSCLE_INSERT_BOOL ("error_verbose", error_verbose);
+  MUSCLE_INSERT_BOOL ("locations_flag", locations_flag);
+  MUSCLE_INSERT_BOOL ("pure", pure_parser);
+  MUSCLE_INSERT_BOOL ("synclines_flag", !no_lines_flag);
+
+  /* File names.  */

   MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
 
   MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
 

-  /* FIXME: This is wrong: the muscles should decide whether they hold
-     a copy or not, but the situation is too obscure currently.  */
-  MUSCLE_INSERT_STRING ("output_infix", output_infix ? output_infix : "");
-  MUSCLE_INSERT_STRING ("output_prefix", short_base_name);
-  MUSCLE_INSERT_STRING ("output_parser_name", parser_file_name);
-  MUSCLE_INSERT_STRING ("output_header_name", spec_defines_file);
-
-  MUSCLE_INSERT_INT ("nnts", nvars);
-  MUSCLE_INSERT_INT ("nrules", nrules);
-  MUSCLE_INSERT_INT ("nstates", nstates);
-  MUSCLE_INSERT_INT ("ntokens", ntokens);
-
-  MUSCLE_INSERT_INT ("locations_flag", locations_flag);
-  MUSCLE_INSERT_INT ("defines_flag", defines_flag);
-
-  /* Copy definitions in directive.  */
-  obstack_1grow (&attrs_obstack, 0);
-  muscle_insert ("prologue", obstack_finish (&attrs_obstack));
+  /* User Code.  */
+  obstack_1grow (&pre_prologue_obstack, 0);
+  obstack_1grow (&post_prologue_obstack, 0);
+  muscle_insert ("pre_prologue", obstack_finish (&pre_prologue_obstack));
+  muscle_insert ("post_prologue", obstack_finish (&post_prologue_obstack));

 
   /* Find the right skeleton file.  */
   if (!skeleton)
     {
 
   /* Find the right skeleton file.  */
   if (!skeleton)
     {

-      if (semantic_parser)
-       skeleton = "bison.hairy";
+      if (glr_parser || nondeterministic_parser)
+       skeleton = "glr.c";

       else
       else

-       skeleton = "bison.simple";
+       skeleton = "yacc.c";

     }
 
   /* Parse the skeleton file and output the needed parsers.  */
     }
 
   /* Parse the skeleton file and output the needed parsers.  */

-  muscle_insert ("skeleton", skeleton);
-}
-
-/*-------------------------.
-| Output the header file.  |
-`-------------------------*/
-
-static void
-header_output (void)
-{
-  FILE *out = xfopen (spec_defines_file, "w");
-  char *macro_name = compute_header_macro ();
-
-  fprintf (out, "#ifndef %s\n", macro_name);
-  fprintf (out, "# define %s\n\n", macro_name);
-
-  token_definitions_output (out);
-  fprintf (out, "\
-#ifndef YYSTYPE\n\
-typedef %s
-yystype;\n\
-# define YYSTYPE yystype\n\
-#endif\n",
-                   muscle_find ("stype"));
-
-  if (!pure_parser)
-    fprintf (out, "\nextern YYSTYPE %slval;\n",
-            spec_name_prefix ? spec_name_prefix : "yy");
-
-  if (locations_flag)
-    {
-      fputs ("\n\n", out);
-      fprintf (out, "\
-#ifndef YYLTYPE\n\
-typedef struct yyltype\n\
-{\n\
-  int first_line;\n\
-  int first_column;\n\
-  int last_line;\n\
-  int last_column;\n\
-} yyltype;\n\
-# define YYLTYPE yyltype\n\
-#endif\n");
-      if (!pure_parser)
-       fprintf (out, "\nextern YYLTYPE %slloc;\n",
-                spec_name_prefix ? spec_name_prefix : "yy");
-    }
-
-  if (semantic_parser)
-    {
-      int i;
-
-      for (i = ntokens; i < nsyms; i++)
-       /* don't make these for dummy nonterminals made by gensym.  */
-       if (*symbols[i]->tag != '@')
-         fprintf (out, "# define NT%s\t%d\n", symbols[i]->tag, i);
-    }
-
-  fprintf (out, "\n#endif /* not %s */\n", macro_name);
-  free (macro_name);
-  xfclose (out);
+  MUSCLE_INSERT_C_STRING ("skeleton", skeleton);

 }
 
 
 }
 
 


@@ -1141,28 +630,17 @@ output (void)
 {
   obstack_init (&format_obstack);
 
 {
   obstack_init (&format_obstack);
 

-  output_token_translations ();
-  output_gram ();
-
-  XFREE (ritem);
-  if (semantic_parser)
-    output_stos ();
-  output_rule_data ();
-  output_actions ();
+  prepare_symbols ();
+  prepare_rules ();
+  prepare_states ();
+  prepare_actions ();

 
   prepare ();
 
   /* Process the selected skeleton file.  */
   output_skeleton ();
 
 
   prepare ();
 
   /* Process the selected skeleton file.  */
   output_skeleton ();
 

-  /* Output the header if needed. */
-
-  if (0)
-    header_output ();
-
-  free (rules + 1);
-  obstack_free (&muscle_obstack, NULL);

   obstack_free (&format_obstack, NULL);
   obstack_free (&format_obstack, NULL);

-  obstack_free (&action_obstack, NULL);
-  obstack_free (&attrs_obstack, NULL);
+  obstack_free (&pre_prologue_obstack, NULL);
+  obstack_free (&post_prologue_obstack, NULL);

 }
 }