Use ASCII for Sebastien Fricker's name.

[bison.git] / src / output.c

diff --git a/src/output.c b/src/output.c
index 57744b108e94bbe3dc3aaf5fc64eda1c0b2b1edb..ef7683ec09dd7fb33add5384ed40aa8ddaa94da8 100644 (file)
--- a/src/output.c
+++ b/src/output.c
@@ -1,6 +1,7 @@
-/* Output the generated parsing program for bison,
-   Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
-   Free Software Foundation, Inc.
+/* Output the generated parsing program for Bison.
+
+   Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
+   2005, 2006, 2007 Free Software Foundation, Inc.

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


@@ -16,97 +17,34 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to the Free
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to the Free

-   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-   02111-1307, USA.  */
-
-
-/* The parser tables consist of these tables.
-
-   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.
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.  */

 
 

-   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 <config.h>
+#include "system.h"

 
 

-   YYFINAL = the state number of the termination state.  YYFLAG = most
-   negative short int.  Used to flag ??  */
+#include <configmake.h>
+#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 "complain.h"
+#include "muscle_tab.h"

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

+#include "scan-code.h"    /* max_left_semantic_context */
+#include "scan-skel.h"

 #include "symtab.h"
 #include "tables.h"
 #include "symtab.h"
 #include "tables.h"

-#include "muscle_tab.h"
-
-/* From src/scan-skel.l. */
-void m4_invoke PARAMS ((const char *definitions));

 
 
 static struct obstack format_obstack;
 
 
 
 static struct obstack format_obstack;
 

-int error_verbose = 0;
-
-

 
 /*-------------------------------------------------------------------.
 | Create a function NAME which associates to the muscle NAME the     |
 
 /*-------------------------------------------------------------------.
 | Create a function NAME which associates to the muscle NAME the     |


@@ -119,7 +57,7 @@ int error_verbose = 0;
 #define GENERATE_MUSCLE_INSERT_TABLE(Name, Type)                       \
                                                                        \
 static void                                                            \
 #define GENERATE_MUSCLE_INSERT_TABLE(Name, Type)                       \
                                                                        \
 static void                                                            \

-Name (const char *name,                                                        \
+Name (char const *name,                                                        \

       Type *table_data,                                                        \
       Type first,                                                      \
       int begin,                                                       \
       Type *table_data,                                                        \
       Type first,                                                      \
       int begin,                                                       \


@@ -127,6 +65,8 @@ Name (const char *name,                                                      \
 {                                                                      \
   Type min = first;                                                    \
   Type max = first;                                                    \
 {                                                                      \
   Type min = first;                                                    \
   Type max = first;                                                    \

+  long int lmin;                                                       \
+  long int lmax;                                                       \

   int i;                                                               \
   int j = 1;                                                           \
                                                                        \
   int i;                                                               \
   int j = 1;                                                           \
                                                                        \


@@ -150,67 +90,94 @@ Name (const char *name,                                                    \
   obstack_1grow (&format_obstack, 0);                                  \
   muscle_insert (name, obstack_finish (&format_obstack));              \
                                                                        \
   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);                                  \
   /* 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),            \
-                         (long int) min);                              \
+  MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmin);     \

   obstack_fgrow1 (&format_obstack, "%s_max", name);                    \
   obstack_1grow (&format_obstack, 0);                                  \
   obstack_fgrow1 (&format_obstack, "%s_max", name);                    \
   obstack_1grow (&format_obstack, 0);                                  \

-  MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack),            \
-                         (long int) max);                              \
+  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_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_t)
-GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_rule_number_table, rule_number_t)
-GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_symbol_number_table, symbol_number_t)
-GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_item_number_table, item_number_t)
-GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number_t)
+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)
+
+
+/*--------------------------------------------------------------------.
+| Print to OUT a representation of STRING escaped both for C and M4.  |
+`--------------------------------------------------------------------*/
+
+static void
+escaped_output (FILE *out, char const *string)
+{
+  char const *p;
+  fprintf (out, "[[");
+
+  for (p = quotearg_style (c_quoting_style, string); *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;
+      }
+
+  fprintf (out, "]]");
+}

 
 
 
 

-/*-----------------------------------------------------------------.
-| Prepare the muscles related to the tokens: translate, tname, and |
-| toknum.                                                          |
-`-----------------------------------------------------------------*/
+/*------------------------------------------------------------------.
+| Prepare the muscles related to the symbols: translate, tname, and |
+| toknum.                                                           |
+`------------------------------------------------------------------*/

 
 static void
 
 static void

-prepare_tokens (void)
+prepare_symbols (void)

 {
 {

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

+  /* tname -- token names.  */

   {
     int i;
   {
     int i;

-    int j = 0;
+    /* We assume that the table will be output starting at column 2. */
+    int j = 2;

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

-       /* Be sure not to use twice the same QUOTEARG slot:
-          SYMBOL_TAG_GET uses slot 0.  */
-       const char *cp =
-         quotearg_n_style (1, c_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)
+       char const *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 = 2;
+           obstack_sgrow (&format_obstack, "\n ");
+           j = 1;

          }
 
          }
 

-       obstack_sgrow (&format_obstack, cp);
-       obstack_sgrow (&format_obstack, ", ");
-       j += strsize;
+       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");
+    obstack_sgrow (&format_obstack, " ]b4_null[");

 
     /* Finish table and store. */
     obstack_1grow (&format_obstack, 0);
 
     /* Finish table and store. */
     obstack_1grow (&format_obstack, 0);


@@ -220,7 +187,7 @@ prepare_tokens (void)
   /* Output YYTOKNUM. */
   {
     int i;
   /* Output YYTOKNUM. */
   {
     int i;

-    int *values = XCALLOC (int, ntokens);
+    int *values = xnmalloc (ntokens, sizeof *values);

     for (i = 0; i < ntokens; ++i)
       values[i] = symbols[i]->user_token_number;
     muscle_insert_int_table ("toknum", values,
     for (i = 0; i < ntokens; ++i)
       values[i] = symbols[i]->user_token_number;
     muscle_insert_int_table ("toknum", values,


@@ -232,25 +199,25 @@ prepare_tokens (void)
 
 /*-------------------------------------------------------------.
 | Prepare the muscles related to the rules: rhs, prhs, r1, r2, |
 
 /*-------------------------------------------------------------.
 | Prepare the muscles related to the rules: rhs, prhs, r1, r2, |

-| rline, dprec, merger                                         |
+| rline, dprec, merger.                                        |

 `-------------------------------------------------------------*/
 
 static void
 prepare_rules (void)
 {
 `-------------------------------------------------------------*/
 
 static void
 prepare_rules (void)
 {

-  rule_number_t r;
+  rule_number r;

   unsigned int i = 0;
   unsigned int i = 0;

-  item_number_t *rhs = XMALLOC (item_number_t, nritems);
-  unsigned int *prhs = XMALLOC (unsigned int, nrules);
-  unsigned int *rline = XMALLOC (unsigned int, nrules);
-  symbol_number_t *r1 = XMALLOC (symbol_number_t, nrules);
-  unsigned int *r2 = XMALLOC (unsigned int, nrules);
-  short *dprec = XMALLOC (short, nrules);
-  short *merger = XMALLOC (short, nrules);
+  item_number *rhs = xnmalloc (nritems, sizeof *rhs);
+  unsigned int *prhs = xnmalloc (nrules, sizeof *prhs);
+  unsigned int *rline = xnmalloc (nrules, sizeof *rline);
+  symbol_number *r1 = xnmalloc (nrules, sizeof *r1);
+  unsigned int *r2 = xnmalloc (nrules, sizeof *r2);
+  int *dprec = xnmalloc (nrules, sizeof *dprec);
+  int *merger = xnmalloc (nrules, sizeof *merger);

 
   for (r = 0; r < nrules; ++r)
     {
 
   for (r = 0; r < nrules; ++r)
     {

-      item_number_t *rhsp = NULL;
+      item_number *rhsp = NULL;

       /* Index of rule R in RHS. */
       prhs[r] = i;
       /* RHS of the rule R. */
       /* Index of rule R in RHS. */
       prhs[r] = i;
       /* RHS of the rule R. */


@@ -263,21 +230,24 @@ prepare_rules (void)
       /* Separator in RHS. */
       rhs[i++] = -1;
       /* Line where rule was defined. */
       /* Separator in RHS. */
       rhs[i++] = -1;
       /* Line where rule was defined. */

-      rline[r] = rules[r].location.first_line;
-      /* Dynamic precedence (GLR) */
+      rline[r] = rules[r].location.start.line;
+      /* Dynamic precedence (GLR).  */

       dprec[r] = rules[r].dprec;
       dprec[r] = rules[r].dprec;

-      /* Merger-function index (GLR) */
+      /* Merger-function index (GLR).  */

       merger[r] = rules[r].merger;
     }
       merger[r] = rules[r].merger;
     }

-  assert (i == nritems);
+  aver (i == nritems);

 
   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_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_table ("dprec", dprec, 0, 0, nrules);
+  muscle_insert_int_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 (rhs);
   free (prhs);


@@ -295,41 +265,40 @@ prepare_rules (void)
 static void
 prepare_states (void)
 {
 static void
 prepare_states (void)
 {

-  state_number_t i;
-  symbol_number_t *values =
-    (symbol_number_t *) alloca (sizeof (symbol_number_t) * nstates);
+  state_number i;
+  symbol_number *values = xnmalloc (nstates, sizeof *values);

   for (i = 0; i < nstates; ++i)
     values[i] = states[i]->accessing_symbol;
   muscle_insert_symbol_number_table ("stos", values,
                                     0, 1, 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);
+
+  MUSCLE_INSERT_INT ("last", high);
+  MUSCLE_INSERT_INT ("final_state_number", final_state->number);
+  MUSCLE_INSERT_INT ("states_number", nstates);

 }
 
 
 
 }
 
 
 

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

 
 static void
 user_actions_output (FILE *out)
 {
 
 static void
 user_actions_output (FILE *out)
 {

-  rule_number_t r;
+  rule_number r;

 
 

-  fputs ("m4_define([b4_actions], \n[[", out);
+  fputs ("m4_define([b4_actions], \n[", out);

   for (r = 0; r < nrules; ++r)
     if (rules[r].action)
       {
   for (r = 0; r < nrules; ++r)
     if (rules[r].action)
       {

-       fprintf (out, "  case %d:\n", r + 1);
-
-       if (!no_lines_flag)
-         fprintf (out, muscle_find ("linef"),
-                  rules[r].action_location.first_line,
-                  quotearg_style (c_quoting_style,
-                                  muscle_find ("filename")));
-       fprintf (out, "    %s\n    break;\n\n",
-                rules[r].action);
+       fprintf (out, "b4_case(%d, [b4_syncline(%d, ", r + 1,
+                rules[r].action_location.start.line);
+       escaped_output (out, rules[r].action_location.start.file);
+       fprintf (out, ")\n[    %s]])\n\n", rules[r].action);

       }
       }

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

 }
 
 /*--------------------------------------.
 }
 
 /*--------------------------------------.


@@ -346,127 +315,99 @@ merger_output (FILE *out)
   for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next)
     {
       if (p->type[0] == '\0')
   for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next)
     {
       if (p->type[0] == '\0')

-       fprintf (out, "  case %d: yyval = %s (*yy0, *yy1); break;\n",
+       fprintf (out, "  case %d: *yy0 = %s (*yy0, *yy1); break;\n",

                 n, p->name);
       else
                 n, p->name);
       else

-       fprintf (out, "  case %d: yyval.%s = %s (*yy0, *yy1); break;\n",
+       fprintf (out, "  case %d: yy0->%s = %s (*yy0, *yy1); break;\n",

                 n, p->type, p->name);
     }
   fputs ("]])\n\n", out);
 }
 
                 n, p->type, p->name);
     }
   fputs ("]])\n\n", out);
 }
 

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

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

-  int first = 1;
+  char const *sep = "";

 
   fputs ("m4_define([b4_tokens], \n[", out);
   for (i = 0; i < ntokens; ++i)
     {
 
   fputs ("m4_define([b4_tokens], \n[", out);
   for (i = 0; i < ntokens; ++i)
     {

-      symbol_t *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.  */
 
       /* At this stage, if there are literal aliases, they are part of
         SYMBOLS, so we should not find symbols which are the aliases
         here.  */

-      assert (number != USER_NUMBER_ALIAS);
+      aver (number != USER_NUMBER_ALIAS);

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

-      if (symbol == errtoken)
+      if (sym == errtoken)

        continue;
 
       /* If this string has an alias, then it is necessarily the alias
         which is to be output.  */
        continue;
 
       /* If this string has an alias, then it is necessarily the alias
         which is to be output.  */

-      if (symbol->alias)
-       symbol = symbol->alias;
+      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"'.  */
 
       /* 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 (symbol->tag[0] == '\'' || symbol->tag[0] == '\"')
+      if (sym->tag[0] == '\'' || sym->tag[0] == '\"')

        continue;
 
       /* Don't #define nonliteral tokens whose names contain periods
         or '$' (as does the default value of the EOF token).  */
        continue;
 
       /* 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, "%s[[[%s]], [%d]]",
-              first ? "" : ",\n", symbol->tag, number);
-
-      first = 0;
+      fprintf (out, "%s[[[%s]], %d]",
+              sep, sym->tag, number);
+      sep = ",\n";

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

-/*----------------------------------------.
-| Output the symbol destructors to OOUT.  |
-`----------------------------------------*/
-
-static void
-symbol_destructors_output (FILE *out)
-{
-  int i;
-  int first = 1;
-
-  fputs ("m4_define([b4_symbol_destructors], \n[", out);
-  for (i = 0; i < nsyms; ++i)
-    if (symbols[i]->destructor)
-      {
-       symbol_t *symbol = symbols[i];
-
-       /* Filename, lineno,
-          Symbol-name, Symbol-number,
-          destructor, typename. */
-       fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
-                first ? "" : ",\n",
-                infile, symbol->destructor_location.first_line,
-                symbol->tag,
-                symbol->number,
-                symbol->destructor,
-                symbol->type_name);
-
-       first = 0;
-      }
-  fputs ("])\n\n", out);
-}
-
-
-/*-------------------------------------.
-| Output the symbol printers to OOUT.  |
-`-------------------------------------*/
+/*---------------------------------------------------.
+| Output the symbol destructors or printers to OUT.  |
+`---------------------------------------------------*/

 
 static void
 
 static void

-symbol_printers_output (FILE *out)
+symbol_code_props_output (FILE *out, char const *what,
+                          code_props const *(*get)(symbol const *))

 {
   int i;
 {
   int i;

-  int first = 1;
+  char const *sep = "";

 
 

-  fputs ("m4_define([b4_symbol_printers], \n[", out);
+  fputs ("m4_define([b4_symbol_", out);
+  fputs (what, out);
+  fputs ("], \n[", out);

   for (i = 0; i < nsyms; ++i)
   for (i = 0; i < nsyms; ++i)

-    if (symbols[i]->destructor)
-      {
-       symbol_t *symbol = symbols[i];
-
-       /* Filename, lineno,
-          Symbol-name, Symbol-number,
-          destructor, typename. */
-       fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
-                first ? "" : ",\n",
-                infile, symbol->printer_location.first_line,
-                symbol->tag,
-                symbol->number,
-                symbol->printer,
-                symbol->type_name);
-
-       first = 0;
-      }
+    {
+      symbol *sym = symbols[i];
+      char const *code = (*get) (sym)->code;
+      if (code)
+        {
+          location loc = (*get) (sym)->location;
+          /* Filename, lineno,
+             Symbol-name, Symbol-number,
+             code, optional typename.  */
+          fprintf (out, "%s[", sep);
+          sep = ",\n";
+          escaped_output (out, loc.start.file);
+          fprintf (out, ", %d, ", loc.start.line);
+          escaped_output (out, sym->tag);
+          fprintf (out, ", %d, [[%s]]", sym->number, code);
+          if (sym->type_name)
+            fprintf (out, ", [[%s]]", sym->type_name);
+          fputc (']', out);
+        }
+    }

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


@@ -513,9 +454,9 @@ prepare_actions (void)
      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,
      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);
+                                   conflict_table[0], 1, high + 1);

   muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list,
   muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list,

-                                   conflict_list[0], 1, conflict_list_cnt);
+                                   0, 1, conflict_list_cnt);

 }
 
 \f
 }
 
 \f


@@ -526,101 +467,152 @@ prepare_actions (void)
 static void
 output_skeleton (void)
 {
 static void
 output_skeleton (void)
 {

-  /* Store the definition of all the muscles. */
-  const char *tempdir = getenv ("TMPDIR");
-  char *tempfile = NULL;
-  FILE *out = NULL;
-  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[7];
+  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 const m4bison[] = "bison.m4";
+  char *full_m4sugar;
+  char *full_m4bison;
+  char *full_skeleton;
+  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_skeleton = xmalloc (pkgdatadirlen + 1
+                          + (skeleton_size < sizeof m4sugar
+                             ? sizeof m4sugar : skeleton_size));
+  strncpy (full_skeleton, pkgdatadir, pkgdatadirlen);
+  full_skeleton[pkgdatadirlen] = '/';
+  strcpy (full_skeleton + pkgdatadirlen + 1, m4sugar);
+  full_m4sugar = xstrdup (full_skeleton);
+  strcpy (full_skeleton + pkgdatadirlen + 1, m4bison);
+  full_m4bison = xstrdup (full_skeleton);
+  if (strchr (skeleton, '/'))
+    strcpy (full_skeleton, skeleton);
+  else
+    strcpy (full_skeleton + 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_m4bison, full_skeleton);
+
+  argv[0] = m4;
+  argv[1] = full_m4sugar;
+  argv[2] = "-";
+  argv[3] = full_m4bison;
+  argv[4] = full_skeleton;
+  argv[5] = trace_flag & trace_m4 ? "-dV" : NULL;
+  argv[6] = NULL;
+
+  init_subpipe ();
+  pid = create_subpipe (argv, filter_fd);
+  free (full_m4bison);
+  free (full_m4sugar);
+  free (full_skeleton);
+
+  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);
 
   user_actions_output (out);
   merger_output (out);
   token_definitions_output (out);
   fputs ("m4_init()\n", out);
 
   user_actions_output (out);
   merger_output (out);
   token_definitions_output (out);

-  symbol_destructors_output (out);
-  symbol_printers_output (out);
+  symbol_code_props_output (out, "destructors", &symbol_destructor_get);
+  symbol_code_props_output (out, "printers", &symbol_printer_get);

 
   muscles_m4_output (out);
 
   muscles_m4_output (out);

-
-  fputs ("m4_wrap([m4_divert_pop(0)])\n", out);
-  fputs ("m4_divert_push(0)dnl\n", out);

   xfclose (out);
 
   xfclose (out);
 

+  /* Read and process m4's output.  */

   timevar_push (TV_M4);
   timevar_push (TV_M4);

-  m4_invoke (tempfile);
+  end_of_output_subpipe (pid, filter_fd);
+  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);
   timevar_pop (TV_M4);

-
-  /* If `debugging', keep this file alive. */
-  if (!(trace_flag & trace_tools))
-    unlink (tempfile);
-
-  free (tempfile);

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

-  /* Flags. */
-  MUSCLE_INSERT_INT ("locations_flag", locations_flag);
-  MUSCLE_INSERT_INT ("defines_flag", defines_flag);
-  MUSCLE_INSERT_INT ("error_verbose", error_verbose);
-  MUSCLE_INSERT_INT ("pure", pure_parser);
-  MUSCLE_INSERT_INT ("debug", debug_flag);
-
-  /* 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 ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
-  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);
-
-  /* Symbols. */
-  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);
-
-  /* Rules. */
-  MUSCLE_INSERT_INT ("rules_number", nrules);
+  /* BISON_USE_PUSH_FOR_PULL is for the test suite and should not be documented
+     for the user.  */
+  char const *use_push_for_pull_env = getenv ("BISON_USE_PUSH_FOR_PULL");
+  bool use_push_for_pull_flag = false;
+  if (use_push_for_pull_env != NULL
+      && use_push_for_pull_env[0] != '\0'
+      && 0 != strcmp (use_push_for_pull_env, "0"))
+    use_push_for_pull_flag = true;

 
 

-  /* States. */
-  MUSCLE_INSERT_INT ("last", high);
-  MUSCLE_INSERT_INT ("final_state_number", final_state->number);
-  MUSCLE_INSERT_INT ("states_number", nstates);
-
-  /* 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)
-    {
-      if (glr_parser)
-       skeleton = "glr.c";
-      else
-       skeleton = "yacc.c";
-    }
-
-  /* Parse the skeleton file and output the needed parsers.  */
-  muscle_insert ("skeleton", skeleton);
+  /* Flags. */
+  MUSCLE_INSERT_BOOL ("debug_flag", debug_flag);
+  MUSCLE_INSERT_BOOL ("defines_flag", defines_flag);
+  MUSCLE_INSERT_BOOL ("error_verbose_flag", error_verbose);
+  MUSCLE_INSERT_BOOL ("glr_flag", glr_parser);
+  MUSCLE_INSERT_BOOL ("locations_flag", locations_flag);
+  MUSCLE_INSERT_BOOL ("nondeterministic_flag", nondeterministic_parser);
+  MUSCLE_INSERT_BOOL ("pull_flag", pull_parser);
+  MUSCLE_INSERT_BOOL ("pure_flag", pure_parser);
+  MUSCLE_INSERT_BOOL ("push_flag", push_parser);
+  MUSCLE_INSERT_BOOL ("synclines_flag", !no_lines_flag);
+  MUSCLE_INSERT_BOOL ("tag_seen_flag", tag_seen);
+  MUSCLE_INSERT_BOOL ("use_push_for_pull_flag", use_push_for_pull_flag);
+  MUSCLE_INSERT_BOOL ("yacc_flag", yacc_flag);
+
+  /* File names.  */
+  if (spec_name_prefix)
+    MUSCLE_INSERT_STRING ("prefix", spec_name_prefix);
+
+  MUSCLE_INSERT_STRING ("file_name_all_but_ext", all_but_ext);
+
+#define DEFINE(Name) MUSCLE_INSERT_STRING (#Name, Name ? Name : "")
+  DEFINE (dir_prefix);
+  DEFINE (parser_file_name);
+  DEFINE (spec_defines_file);
+  DEFINE (spec_file_prefix);
+  DEFINE (spec_graph_file);
+  DEFINE (spec_name_prefix);
+  DEFINE (spec_outfile);
+  DEFINE (spec_verbose_file);
+#undef DEFINE
+
+  /* Find the right skeleton file, and add muscles about the skeletons.  */
+  if (skeleton)
+    MUSCLE_INSERT_C_STRING ("skeleton", skeleton);
+  else
+    skeleton = language->skeleton;
+
+  /* About the skeletons.  */
+  {
+    char const *pkgdatadir = getenv ("BISON_PKGDATADIR");
+    /* b4_pkgdatadir is used inside m4_include in the skeletons, so digraphs
+       would never be expanded.  Hopefully no one has M4-special characters in
+       his Bison installation path.  */
+    MUSCLE_INSERT_STRING_RAW ("pkgdatadir",
+                              pkgdatadir ? pkgdatadir : PKGDATADIR);
+  }

 }
 
 
 }
 
 


@@ -633,7 +625,7 @@ output (void)
 {
   obstack_init (&format_obstack);
 
 {
   obstack_init (&format_obstack);
 

-  prepare_tokens ();
+  prepare_symbols ();

   prepare_rules ();
   prepare_states ();
   prepare_actions ();
   prepare_rules ();
   prepare_states ();
   prepare_actions ();


@@ -644,6 +636,4 @@ output (void)
   output_skeleton ();
 
   obstack_free (&format_obstack, NULL);
   output_skeleton ();
 
   obstack_free (&format_obstack, NULL);

-  obstack_free (&pre_prologue_obstack, NULL);
-  obstack_free (&post_prologue_obstack, NULL);

 }
 }