* src/bison.simple: Remove #line just before %%epilogue. It

[bison.git] / src / reader.c

diff --git a/src/reader.c b/src/reader.c
index cc24af65904feb5b8755b6dfbde63ddc7510837e..d42d90ecc9492b62c7f99761eef379c190feae57 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -1,5 +1,5 @@
 /* Input parser for bison
 /* Input parser for bison

-   Copyright 1984, 1986, 1989, 1992, 1998, 2000
+   Copyright 1984, 1986, 1989, 1992, 1998, 2000, 2001

    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.


@@ -26,22 +26,21 @@
 #include "quote.h"
 #include "getargs.h"
 #include "files.h"
 #include "quote.h"
 #include "getargs.h"
 #include "files.h"

-#include "xalloc.h"

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

+#include "options.h"

 #include "lex.h"
 #include "gram.h"
 #include "complain.h"
 #include "output.h"
 #include "reader.h"
 #include "conflicts.h"
 #include "lex.h"
 #include "gram.h"
 #include "complain.h"
 #include "output.h"
 #include "reader.h"
 #include "conflicts.h"

-
-/* Number of slots allocated (but not necessarily used yet) in `rline'  */
-static int rline_allocated;
+#include "muscle_tab.h"

 
 typedef struct symbol_list
 {
   struct symbol_list *next;
   bucket *sym;
 
 typedef struct symbol_list
 {
   struct symbol_list *next;
   bucket *sym;

+  int line;

   bucket *ruleprec;
 }
 symbol_list;
   bucket *ruleprec;
 }
 symbol_list;


@@ -63,11 +62,21 @@ static int typed;
 /* Incremented for each %left, %right or %nonassoc seen */
 static int lastprec;
 
 /* Incremented for each %left, %right or %nonassoc seen */
 static int lastprec;
 

-/* Incremented for each generated symbol */
-static int gensym_count;
-

 static bucket *errtoken;
 static bucket *undeftoken;
 static bucket *errtoken;
 static bucket *undeftoken;

+
+
+static symbol_list *
+symbol_list_new (bucket *sym)
+{
+  symbol_list *res = XMALLOC (symbol_list, 1);
+  res->next = NULL;
+  res->sym = sym;
+  res->line = lineno;
+  res->ruleprec = NULL;
+  return res;
+}
+

 \f
 
 /*===================\
 \f
 
 /*===================\


@@ -125,7 +134,7 @@ read_signed_integer (FILE *stream)
 `--------------------------------------------------------------*/
 
 static char *
 `--------------------------------------------------------------*/
 
 static char *

-get_type_name (int n, symbol_list * rule)
+get_type_name (int n, symbol_list *rule)

 {
   int i;
   symbol_list *rp;
 {
   int i;
   symbol_list *rp;


@@ -153,19 +162,17 @@ get_type_name (int n, symbol_list * rule)
   return rp->sym->type_name;
 }
 \f
   return rp->sym->type_name;
 }
 \f

-/*-----------------------------------------------------------------.
-| Dump the string from FIN to FOUT and OOUT if non null.  MATCH is |
-| the delimiter of the string (either ' or ").                     |
-`-----------------------------------------------------------------*/
+/*------------------------------------------------------------.
+| Dump the string from FIN to OOUT if non null.  MATCH is the |
+| delimiter of the string (either ' or ").                    |
+`------------------------------------------------------------*/

 
 static inline void
 
 static inline void

-copy_string (FILE *fin, FILE *fout, struct obstack *oout, int match)
+copy_string2 (FILE *fin, struct obstack *oout, int match, int store)

 {
   int c;
 
 {
   int c;
 

-  if (fout)
-    putc (match, fout);
-  if (oout)
+  if (store)

     obstack_1grow (oout, match);
 
   c = getc (fin);
     obstack_1grow (oout, match);
 
   c = getc (fin);


@@ -182,20 +189,14 @@ copy_string (FILE *fin, FILE *fout, struct obstack *oout, int match)
          continue;
        }
 
          continue;
        }
 

-      if (fout)
-       putc (c, fout);
-      if (oout)
-       obstack_1grow (oout, c);
+      obstack_1grow (oout, c);

 
       if (c == '\\')
        {
          c = getc (fin);
          if (c == EOF)
            fatal (_("unterminated string at end of file"));
 
       if (c == '\\')
        {
          c = getc (fin);
          if (c == EOF)
            fatal (_("unterminated string at end of file"));

-         if (fout)
-           putc (c, fout);
-         if (oout)
-           obstack_1grow (oout, c);
+         obstack_1grow (oout, c);

 
          if (c == '\n')
            lineno++;
 
          if (c == '\n')
            lineno++;


@@ -204,34 +205,48 @@ copy_string (FILE *fin, FILE *fout, struct obstack *oout, int match)
       c = getc (fin);
     }
 
       c = getc (fin);
     }
 

-  if (fout)
-    putc (c, fout);
-  if (oout)
+  if (store)

     obstack_1grow (oout, c);
 }
 
     obstack_1grow (oout, c);
 }
 

+/* FIXME. */

 
 

-/*----------------------------------------------------------------.
-| Dump the wannabee comment from IN to OUT1 and OUT2.  In fact we |
-| just saw a `/', which might or might not be a comment.  In any  |
-| case, copy what we saw.                                         |
-|                                                                 |
-| OUT2 might be NULL.                                             |
-`----------------------------------------------------------------*/
+static inline void
+copy_string (FILE *fin, struct obstack *oout, int match)
+{
+  copy_string2 (fin, oout, match, 1);
+}
+
+/* FIXME. */
+
+static inline void
+copy_identifier (FILE *fin, struct obstack *oout)
+{
+  int c;
+
+  while (isalnum (c = getc (fin)) || c == '_')
+    obstack_1grow (oout, c);
+
+  ungetc (c, fin);
+}
+
+/*-----------------------------------------------------------------.
+| Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |
+| NULL).  In fact we just saw a `/', which might or might not be a |
+| comment.  In any case, copy what we saw.                         |
+|                                                                  |
+| OUT2 might be NULL.                                              |
+`-----------------------------------------------------------------*/

 
 static inline void
 
 static inline void

-copy_comment2 (FILE *fin, FILE *out1,
-              struct obstack *oout2, struct obstack *oout)
+copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)

 {
   int cplus_comment;
   int ended;
   int c;
 
   /* We read a `/', output it. */
 {
   int cplus_comment;
   int ended;
   int c;
 
   /* We read a `/', output it. */

-  if (out1)
-    putc ('/', out1);
-  if (oout)
-    obstack_1grow (oout, '/');
+  obstack_1grow (oout1, '/');

   if (oout2)
     obstack_1grow (oout2, '/');
 
   if (oout2)
     obstack_1grow (oout2, '/');
 


@@ -248,10 +263,7 @@ copy_comment2 (FILE *fin, FILE *out1,
       return;
     }
 
       return;
     }
 

-  if (out1)
-    putc (c, out1);
-  if (oout)
-    obstack_1grow (oout, c);
+  obstack_1grow (oout1, c);

   if (oout2)
     obstack_1grow (oout2, c);
   c = getc (fin);
   if (oout2)
     obstack_1grow (oout2, c);
   c = getc (fin);


@@ -263,10 +275,7 @@ copy_comment2 (FILE *fin, FILE *out1,
        {
          while (c == '*')
            {
        {
          while (c == '*')
            {

-             if (out1)
-               putc (c, out1);
-             if (oout)
-               obstack_1grow (oout, c);
+             obstack_1grow (oout1, c);

              if (oout2)
                obstack_1grow (oout2, c);
              c = getc (fin);
              if (oout2)
                obstack_1grow (oout2, c);
              c = getc (fin);


@@ -274,10 +283,7 @@ copy_comment2 (FILE *fin, FILE *out1,
 
          if (c == '/')
            {
 
          if (c == '/')
            {

-             if (out1)
-               putc (c, out1);
-             if (oout)
-               obstack_1grow (oout, c);
+             obstack_1grow (oout1, c);

              if (oout2)
                obstack_1grow (oout2, c);
              ended = 1;
              if (oout2)
                obstack_1grow (oout2, c);
              ended = 1;


@@ -286,10 +292,7 @@ copy_comment2 (FILE *fin, FILE *out1,
       else if (c == '\n')
        {
          lineno++;
       else if (c == '\n')
        {
          lineno++;

-         if (out1)
-           putc (c, out1);
-         if (oout)
-           obstack_1grow (oout, c);
+         obstack_1grow (oout1, c);

          if (oout2)
            obstack_1grow (oout2, c);
          if (cplus_comment)
          if (oout2)
            obstack_1grow (oout2, c);
          if (cplus_comment)


@@ -301,10 +304,7 @@ copy_comment2 (FILE *fin, FILE *out1,
        fatal (_("unterminated comment"));
       else
        {
        fatal (_("unterminated comment"));
       else
        {

-         if (out1)
-           putc (c, out1);
-         if (oout)
-           obstack_1grow (oout, c);
+         obstack_1grow (oout1, c);

          if (oout2)
            obstack_1grow (oout2, c);
          c = getc (fin);
          if (oout2)
            obstack_1grow (oout2, c);
          c = getc (fin);


@@ -315,50 +315,42 @@ copy_comment2 (FILE *fin, FILE *out1,
 
 /*-------------------------------------------------------------------.
 | Dump the comment (actually the current string starting with a `/') |
 
 /*-------------------------------------------------------------------.
 | Dump the comment (actually the current string starting with a `/') |

-| from FIN to FOUT.                                                  |
+| from FIN to OOUT.                                                  |

 `-------------------------------------------------------------------*/
 
 static inline void
 `-------------------------------------------------------------------*/
 
 static inline void

-copy_comment (FILE *fin, FILE *fout, struct obstack *oout)
+copy_comment (FILE *fin, struct obstack *oout)

 {
 {

-  copy_comment2 (fin, fout, NULL, oout);
+  copy_comment2 (fin, oout, NULL);

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

-| FIN is pointing to a location (i.e., a `@').  Output to FOUT a   |
+| FIN is pointing to a location (i.e., a `@').  Output to OOUT a   |

 | reference to this location. STACK_OFFSET is the number of values |
 | in the current rule so far, which says where to find `$0' with   |
 | respect to the top of the stack.                                 |
 `-----------------------------------------------------------------*/
 
 static inline void
 | reference to this location. STACK_OFFSET is the number of values |
 | in the current rule so far, which says where to find `$0' with   |
 | respect to the top of the stack.                                 |
 `-----------------------------------------------------------------*/
 
 static inline void

-copy_at (FILE *fin, FILE *fout, struct obstack *oout, int stack_offset)
+copy_at (FILE *fin, struct obstack *oout, int stack_offset)

 {
   int c;
 
   c = getc (fin);
   if (c == '$')
     {
 {
   int c;
 
   c = getc (fin);
   if (c == '$')
     {

-      if (fout)
-       fprintf (fout, "yyloc");
-      if (oout)
-       obstack_grow_literal_string (oout, "yyloc");
+      obstack_sgrow (oout, "yyloc");

       locations_flag = 1;
     }
   else if (isdigit (c) || c == '-')
     {
       int n;
       locations_flag = 1;
     }
   else if (isdigit (c) || c == '-')
     {
       int n;

-      char buf[4096];

 
       ungetc (c, fin);
       n = read_signed_integer (fin);
 
 
       ungetc (c, fin);
       n = read_signed_integer (fin);
 

-      sprintf (buf, "yylsp[%d]", n - stack_offset);
-      if (fout)
-       fputs (buf, fout);
-      if (oout)
-       obstack_grow (oout, buf, strlen (buf));
+      obstack_fgrow1 (oout, "yylsp[%d]", n - stack_offset);

       locations_flag = 1;
     }
   else
       locations_flag = 1;
     }
   else


@@ -375,17 +367,17 @@ copy_at (FILE *fin, FILE *fout, struct obstack *oout, int stack_offset)
 |                                                                    |
 | Possible inputs: $[<TYPENAME>]($|integer)                          |
 |                                                                    |
 |                                                                    |
 | Possible inputs: $[<TYPENAME>]($|integer)                          |
 |                                                                    |

-| Output to FOUT a reference to this semantic value. STACK_OFFSET is |
+| Output to OOUT a reference to this semantic value. STACK_OFFSET is |

 | the number of values in the current rule so far, which says where  |
 | to find `$0' with respect to the top of the stack.                 |
 `-------------------------------------------------------------------*/
 
 static inline void
 | the number of values in the current rule so far, which says where  |
 | to find `$0' with respect to the top of the stack.                 |
 `-------------------------------------------------------------------*/
 
 static inline void

-copy_dollar (FILE *fin, FILE *fout, struct obstack *oout,
+copy_dollar (FILE *fin, struct obstack *oout,

             symbol_list *rule, int stack_offset)
 {
   int c = getc (fin);
             symbol_list *rule, int stack_offset)
 {
   int c = getc (fin);

-  char *type_name = NULL;
+  const char *type_name = NULL;

 
   /* Get the type name if explicit. */
   if (c == '<')
 
   /* Get the type name if explicit. */
   if (c == '<')


@@ -398,20 +390,12 @@ copy_dollar (FILE *fin, FILE *fout, struct obstack *oout,
 
   if (c == '$')
     {
 
   if (c == '$')
     {

-      if (fout)
-       fputs ("yyval", fout);
-      if (oout)
-       obstack_grow_literal_string (oout, "yyval");
+      obstack_sgrow (oout, "yyval");

 
       if (!type_name)
        type_name = get_type_name (0, rule);
       if (type_name)
 
       if (!type_name)
        type_name = get_type_name (0, rule);
       if (type_name)

-       {
-         if (fout)
-           fprintf (fout, ".%s", type_name);
-         if (oout)
-           obstack_fgrow1 (oout, ".%s", type_name);
-       }
+       obstack_fgrow1 (oout, ".%s", type_name);

       if (!type_name && typed)
        complain (_("$$ of `%s' has no declared type"),
                  rule->sym->tag);
       if (!type_name && typed)
        complain (_("$$ of `%s' has no declared type"),
                  rule->sym->tag);


@@ -425,18 +409,10 @@ copy_dollar (FILE *fin, FILE *fout, struct obstack *oout,
       if (!type_name && n > 0)
        type_name = get_type_name (n, rule);
 
       if (!type_name && n > 0)
        type_name = get_type_name (n, rule);
 

-      if (fout)
-       fprintf (fout, "yyvsp[%d]", n - stack_offset);
-      if (oout)
-       obstack_fgrow1 (oout, "yyvsp[%d]", n - stack_offset);
+      obstack_fgrow1 (oout, "yyvsp[%d]", n - stack_offset);

 
       if (type_name)
 
       if (type_name)

-       {
-         if (fout)
-           fprintf (fout, ".%s", type_name);
-         if (oout)
-           obstack_fgrow1 (oout, ".%s", type_name);
-       }
+       obstack_fgrow1 (oout, ".%s", type_name);

       if (!type_name && typed)
        complain (_("$%d of `%s' has no declared type"),
                  n, rule->sym->tag);
       if (!type_name && typed)
        complain (_("$%d of `%s' has no declared type"),
                  n, rule->sym->tag);


@@ -462,8 +438,11 @@ copy_definition (void)
   int after_percent;
 
   if (!no_lines_flag)
   int after_percent;
 
   if (!no_lines_flag)

-    obstack_fgrow2 (&attrs_obstack, "#line %d %s\n",
-                   lineno, quotearg_style (c_quoting_style, infile));
+    {
+      obstack_fgrow2 (&attrs_obstack, muscle_find ("linef"),
+                     lineno, quotearg_style (c_quoting_style,
+                                             muscle_find("filename")));
+    }

 
   after_percent = 0;
 
 
   after_percent = 0;
 


@@ -484,11 +463,11 @@ copy_definition (void)
 
        case '\'':
        case '"':
 
        case '\'':
        case '"':

-         copy_string (finput, 0, &attrs_obstack, c);
+         copy_string (finput, &attrs_obstack, c);

          break;
 
        case '/':
          break;
 
        case '/':

-         copy_comment (finput, 0, &attrs_obstack);
+         copy_comment (finput, &attrs_obstack);

          break;
 
        case EOF:
          break;
 
        case EOF:


@@ -520,8 +499,8 @@ copy_definition (void)
 static void
 parse_token_decl (symbol_class what_is, symbol_class what_is_not)
 {
 static void
 parse_token_decl (symbol_class what_is, symbol_class what_is_not)
 {

-  int token = 0;
-  char *typename = 0;
+  token_t token = tok_undef;
+  char *typename = NULL;

 
   /* The symbol being defined.  */
   struct bucket *symbol = NULL;
 
   /* The symbol being defined.  */
   struct bucket *symbol = NULL;


@@ -540,18 +519,18 @@ parse_token_decl (symbol_class what_is, symbol_class what_is_not)
        fatal (_("Premature EOF after %s"), token_buffer);
 
       token = lex ();
        fatal (_("Premature EOF after %s"), token_buffer);
 
       token = lex ();

-      if (token == COMMA)
+      if (token == tok_comma)

        {
          symbol = NULL;
          continue;
        }
        {
          symbol = NULL;
          continue;
        }

-      if (token == TYPENAME)
+      if (token == tok_typename)

        {
          typename = xstrdup (token_buffer);
          value_components_used = 1;
          symbol = NULL;
        }
        {
          typename = xstrdup (token_buffer);
          value_components_used = 1;
          symbol = NULL;
        }

-      else if (token == IDENTIFIER && *symval->tag == '\"' && symbol)
+      else if (token == tok_identifier && *symval->tag == '\"' && symbol)

        {
          if (symval->alias)
            warn (_("symbol `%s' used more than once as a literal string"),
        {
          if (symval->alias)
            warn (_("symbol `%s' used more than once as a literal string"),


@@ -570,10 +549,9 @@ parse_token_decl (symbol_class what_is, symbol_class what_is_not)
              /* symbol and symval combined are only one symbol */
              nsyms--;
            }
              /* symbol and symval combined are only one symbol */
              nsyms--;
            }

-         translations = 1;

          symbol = NULL;
        }
          symbol = NULL;
        }

-      else if (token == IDENTIFIER)
+      else if (token == tok_identifier)

        {
          int oldclass = symval->class;
          symbol = symval;
        {
          int oldclass = symval->class;
          symbol = symval;


@@ -592,15 +570,15 @@ parse_token_decl (symbol_class what_is, symbol_class what_is_not)
                complain (_("type redeclaration for %s"), symbol->tag);
            }
        }
                complain (_("type redeclaration for %s"), symbol->tag);
            }
        }

-      else if (symbol && token == NUMBER)
+      else if (symbol && token == tok_number)

        {
          symbol->user_token_number = numval;
        {
          symbol->user_token_number = numval;

-         translations = 1;

        }
       else
        {
          complain (_("`%s' is invalid in %s"),
        }
       else
        {
          complain (_("`%s' is invalid in %s"),

-                   token_buffer, (what_is == token_sym) ? "%token" : "%nterm");
+                   token_buffer,
+                   (what_is == token_sym) ? "%token" : "%nterm");

          skip_to_char ('%');
        }
     }
          skip_to_char ('%');
        }
     }


@@ -617,7 +595,7 @@ parse_start_decl (void)
 {
   if (start_flag)
     complain (_("multiple %s declarations"), "%start");
 {
   if (start_flag)
     complain (_("multiple %s declarations"), "%start");

-  if (lex () != IDENTIFIER)
+  if (lex () != tok_identifier)

     complain (_("invalid %s declaration"), "%start");
   else
     {
     complain (_("invalid %s declaration"), "%start");
   else
     {


@@ -636,7 +614,7 @@ parse_type_decl (void)
 {
   char *name;
 
 {
   char *name;
 

-  if (lex () != TYPENAME)
+  if (lex () != tok_typename)

     {
       complain ("%s", _("%type declaration has no <typename>"));
       skip_to_char ('%');
     {
       complain ("%s", _("%type declaration has no <typename>"));
       skip_to_char ('%');


@@ -647,7 +625,7 @@ parse_type_decl (void)
 
   for (;;)
     {
 
   for (;;)
     {

-      int t;
+      token_t t;

       int tmp_char = ungetc (skip_white_space (), finput);
 
       if (tmp_char == '%')
       int tmp_char = ungetc (skip_white_space (), finput);
 
       if (tmp_char == '%')


@@ -660,11 +638,11 @@ parse_type_decl (void)
       switch (t)
        {
 
       switch (t)
        {
 

-       case COMMA:
-       case SEMICOLON:
+       case tok_comma:
+       case tok_semicolon:

          break;
 
          break;
 

-       case IDENTIFIER:
+       case tok_identifier:

          if (symval->type_name == NULL)
            symval->type_name = name;
          else if (strcmp (name, symval->type_name) != 0)
          if (symval->type_name == NULL)
            symval->type_name = name;
          else if (strcmp (name, symval->type_name) != 0)


@@ -697,7 +675,7 @@ parse_assoc_decl (associativity assoc)
 
   for (;;)
     {
 
   for (;;)
     {

-      int t;
+      token_t t;

       int tmp_char = ungetc (skip_white_space (), finput);
 
       if (tmp_char == '%')
       int tmp_char = ungetc (skip_white_space (), finput);
 
       if (tmp_char == '%')


@@ -709,14 +687,14 @@ parse_assoc_decl (associativity assoc)
 
       switch (t)
        {
 
       switch (t)
        {

-       case TYPENAME:
+       case tok_typename:

          name = xstrdup (token_buffer);
          break;
 
          name = xstrdup (token_buffer);
          break;
 

-       case COMMA:
+       case tok_comma:

          break;
 
          break;
 

-       case IDENTIFIER:
+       case tok_identifier:

          if (symval->prec != 0)
            complain (_("redefining precedence of %s"), symval->tag);
          symval->prec = lastprec;
          if (symval->prec != 0)
            complain (_("redefining precedence of %s"), symval->tag);
          symval->prec = lastprec;


@@ -733,11 +711,10 @@ parse_assoc_decl (associativity assoc)
            }
          break;
 
            }
          break;
 

-       case NUMBER:
-         if (prev == IDENTIFIER)
+       case tok_number:
+         if (prev == tok_identifier)

            {
              symval->user_token_number = numval;
            {
              symval->user_token_number = numval;

-             translations = 1;

            }
          else
            {
            }
          else
            {


@@ -748,7 +725,7 @@ token_buffer);
            }
          break;
 
            }
          break;
 

-       case SEMICOLON:
+       case tok_semicolon:

          return;
 
        default:
          return;
 
        default:


@@ -757,16 +734,15 @@ token_buffer);
        }
 
       prev = t;
        }
 
       prev = t;

-

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

-| Copy the union declaration into ATTRS_OBSTACK (and fdefines), |
-| where it is made into the definition of YYSTYPE, the type of  |
-| elements of the parser value stack.                           |
+| Copy the union declaration into the stype muscle             |
+| (and fdefines),  where it is made into the definition of     |
+| YYSTYPE, the type of elements of the parser value stack.     |

 `--------------------------------------------------------------*/
 
 static void
 `--------------------------------------------------------------*/
 
 static void


@@ -774,29 +750,43 @@ parse_union_decl (void)
 {
   int c;
   int count = 0;
 {
   int c;
   int count = 0;

+  struct obstack union_obstack;
+  const char *prologue = "\
+#ifndef YYSTYPE\n\
+typedef union";
+  const char *epilogue = "\
+ yystype;\n\
+# define YYSTYPE yystype\n\
+#endif\n";

 
   if (typed)
     complain (_("multiple %s declarations"), "%union");
 
   typed = 1;
 
 
   if (typed)
     complain (_("multiple %s declarations"), "%union");
 
   typed = 1;
 

-  if (!no_lines_flag)
-    obstack_fgrow2 (&attrs_obstack, "\n#line %d %s\n",
-                   lineno, quotearg_style (c_quoting_style, infile));
-  else
+  /* FIXME: I'm worried: are you sure attrs_obstack is properly
+     filled?  */
+  /* I don't see any reasons to keep this line, because we should
+     create a special skeleton for this option.  */
+  if (no_lines_flag)

     obstack_1grow (&attrs_obstack, '\n');
 
     obstack_1grow (&attrs_obstack, '\n');
 

-  obstack_grow_literal_string (&attrs_obstack, "typedef union");
+  obstack_init (&union_obstack);
+  obstack_sgrow (&union_obstack, "union");

   if (defines_flag)
   if (defines_flag)

-    obstack_grow_literal_string (&defines_obstack, "typedef union");
+    obstack_sgrow (&defines_obstack, prologue);

 
   c = getc (finput);
 
   while (c != EOF)
     {
 
   c = getc (finput);
 
   while (c != EOF)
     {

-      obstack_1grow (&attrs_obstack, c);
-      if (defines_flag)
-       obstack_1grow (&defines_obstack, c);
+      /* If C contains '/', it is output by copy_comment ().  */
+      if (c != '/')
+       {
+         obstack_1grow (&union_obstack, c);
+         if (defines_flag)
+           obstack_1grow (&defines_obstack, c);
+       }

 
       switch (c)
        {
 
       switch (c)
        {


@@ -805,7 +795,7 @@ parse_union_decl (void)
          break;
 
        case '/':
          break;
 
        case '/':

-         copy_comment2 (finput, 0, &defines_obstack, &attrs_obstack);
+         copy_comment2 (finput, &defines_obstack, &union_obstack);

          break;
 
        case '{':
          break;
 
        case '{':


@@ -818,19 +808,21 @@ parse_union_decl (void)
          count--;
          if (count <= 0)
            {
          count--;
          if (count <= 0)
            {

-             obstack_grow_literal_string (&attrs_obstack, " YYSTYPE;\n");

              if (defines_flag)
              if (defines_flag)

-               obstack_grow_literal_string (&defines_obstack, " YYSTYPE;\n");
+               obstack_sgrow (&defines_obstack, epilogue);

              /* JF don't choke on trailing semi */
              c = skip_white_space ();
              if (c != ';')
                ungetc (c, finput);
              /* JF don't choke on trailing semi */
              c = skip_white_space ();
              if (c != ';')
                ungetc (c, finput);

+             obstack_1grow (&union_obstack, 0);
+             muscle_insert ("stype", obstack_finish (&union_obstack));

              return;
            }
        }
 
       c = getc (finput);
     }
              return;
            }
        }
 
       c = getc (finput);
     }

+

 }
 
 
 }
 
 


@@ -875,14 +867,13 @@ parse_expect_decl (void)
 static void
 parse_thong_decl (void)
 {
 static void
 parse_thong_decl (void)
 {

-  int token;
+  token_t token;

   struct bucket *symbol;
   char *typename = 0;
   struct bucket *symbol;
   char *typename = 0;

-  int usrtoknum;
+  int usrtoknum = SUNDEF;

 
 

-  translations = 1;

   token = lex ();              /* fetch typename or first token */
   token = lex ();              /* fetch typename or first token */

-  if (token == TYPENAME)
+  if (token == tok_typename)

     {
       typename = xstrdup (token_buffer);
       value_components_used = 1;
     {
       typename = xstrdup (token_buffer);
       value_components_used = 1;


@@ -891,7 +882,7 @@ parse_thong_decl (void)
 
   /* process first token */
 
 
   /* process first token */
 

-  if (token != IDENTIFIER)
+  if (token != tok_identifier)

     {
       complain (_("unrecognized item %s, expected an identifier"),
                token_buffer);
     {
       complain (_("unrecognized item %s, expected an identifier"),
                token_buffer);


@@ -905,17 +896,15 @@ parse_thong_decl (void)
 
   token = lex ();              /* get number or literal string */
 
 
   token = lex ();              /* get number or literal string */
 

-  if (token == NUMBER)
+  if (token == tok_number)

     {
       usrtoknum = numval;
       token = lex ();          /* okay, did number, now get literal */
     }
     {
       usrtoknum = numval;
       token = lex ();          /* okay, did number, now get literal */
     }

-  else
-    usrtoknum = 0;

 
   /* process literal string token */
 
 
   /* process literal string token */
 

-  if (token != IDENTIFIER || *symval->tag != '\"')
+  if (token != tok_identifier || *symval->tag != '\"')

     {
       complain (_("expected string constant instead of %s"), token_buffer);
       skip_to_char ('%');
     {
       complain (_("expected string constant instead of %s"), token_buffer);
       skip_to_char ('%');


@@ -932,6 +921,102 @@ parse_thong_decl (void)
   nsyms--;
 }
 
   nsyms--;
 }
 

+static void
+parse_muscle_decl (void)
+{
+  int ch = ungetc (skip_white_space (), finput);
+  char* muscle_key;
+  char* muscle_value;
+
+  /* Read key. */
+  if (!isalpha (ch) && ch != '_')
+    {
+      complain (_("invalid %s declaration"), "%define");
+      skip_to_char ('%');
+      return;
+    }
+  copy_identifier (finput, &muscle_obstack);
+  obstack_1grow (&muscle_obstack, 0);
+  muscle_key = obstack_finish (&muscle_obstack);
+
+  /* Read value. */
+  ch = skip_white_space ();
+  if (ch != '"')
+    {
+      ungetc (ch, finput);
+      if (ch != EOF)
+       {
+         complain (_("invalid %s declaration"), "%define");
+         skip_to_char ('%');
+         return;
+       }
+      else
+       fatal (_("Premature EOF after %s"), "\"");
+    }
+  copy_string2 (finput, &muscle_obstack, '"', 0);
+  obstack_1grow (&muscle_obstack, 0);
+  muscle_value = obstack_finish (&muscle_obstack);
+
+  /* Store the (key, value) pair in the environment. */
+  muscle_insert (muscle_key, muscle_value);
+}
+
+
+
+/*---------------------------------.
+| Parse a double quoted parameter. |
+`---------------------------------*/
+
+static const char *
+parse_dquoted_param (const char *from)
+{
+  struct obstack param_obstack;
+  const char *param = NULL;
+  int c;
+
+  obstack_init (&param_obstack);
+  c = skip_white_space ();
+
+  if (c != '"')
+    {
+      complain (_("invalid %s declaration"), from);
+      ungetc (c, finput);
+      skip_to_char ('%');
+      return NULL;
+    }
+
+  for (;;)
+    {
+      if (literalchar (NULL, &c, '\"'))
+       obstack_1grow (&param_obstack, c);
+      else
+       break;
+    }
+
+  obstack_1grow (&param_obstack, '\0');
+  param = obstack_finish (&param_obstack);
+
+  if (c != '"' || strlen (param) == 0)
+    {
+      complain (_("invalid %s declaration"), from);
+      if (c != '"')
+       ungetc (c, finput);
+      skip_to_char ('%');
+      return NULL;
+    }
+
+  return param;
+}
+
+/*----------------------------------.
+| Parse what comes after %skeleton. |
+`----------------------------------*/
+
+static void
+parse_skel_decl (void)
+{
+  skeleton = parse_dquoted_param ("%skeleton");
+}

 
 /*----------------------------------------------------------------.
 | Read from finput until `%%' is seen.  Discard the `%%'.  Handle |
 
 /*----------------------------------------------------------------.
 | Read from finput until `%%' is seen.  Discard the `%%'.  Handle |


@@ -942,78 +1027,81 @@ parse_thong_decl (void)
 static void
 read_declarations (void)
 {
 static void
 read_declarations (void)
 {

-  int c;
-  int tok;
-

   for (;;)
     {
   for (;;)
     {

-      c = skip_white_space ();
+      int c = skip_white_space ();

 
       if (c == '%')
        {
 
       if (c == '%')
        {

-         tok = parse_percent_token ();
+         token_t tok = parse_percent_token ();

 
          switch (tok)
            {
 
          switch (tok)
            {

-           case TWO_PERCENTS:
+           case tok_two_percents:

              return;
 
              return;
 

-           case PERCENT_LEFT_CURLY:
+           case tok_percent_left_curly:

              copy_definition ();
              break;
 
              copy_definition ();
              break;
 

-           case TOKEN:
+           case tok_token:

              parse_token_decl (token_sym, nterm_sym);
              break;
 
              parse_token_decl (token_sym, nterm_sym);
              break;
 

-           case NTERM:
+           case tok_nterm:

              parse_token_decl (nterm_sym, token_sym);
              break;
 
              parse_token_decl (nterm_sym, token_sym);
              break;
 

-           case TYPE:
+           case tok_type:

              parse_type_decl ();
              break;
 
              parse_type_decl ();
              break;
 

-           case START:
+           case tok_start:

              parse_start_decl ();
              break;
 
              parse_start_decl ();
              break;
 

-           case UNION:
+           case tok_union:

              parse_union_decl ();
              break;
 
              parse_union_decl ();
              break;
 

-           case EXPECT:
+           case tok_expect:

              parse_expect_decl ();
              break;
              parse_expect_decl ();
              break;

-           case THONG:
+
+           case tok_thong:

              parse_thong_decl ();
              break;
 
              parse_thong_decl ();
              break;
 

-           case LEFT:
+           case tok_left:

              parse_assoc_decl (left_assoc);
              break;
 
              parse_assoc_decl (left_assoc);
              break;
 

-           case RIGHT:
+           case tok_right:

              parse_assoc_decl (right_assoc);
              break;
 
              parse_assoc_decl (right_assoc);
              break;
 

-           case NONASSOC:
+           case tok_nonassoc:

              parse_assoc_decl (non_assoc);
              break;
 
              parse_assoc_decl (non_assoc);
              break;
 

-           case SEMANTIC_PARSER:
-             if (!semantic_parser)
-               fguard = xfopen (guardfile, "w");
-             semantic_parser = 1;
+           case tok_define:
+             parse_muscle_decl ();
+             break;
+
+           case tok_skel:
+             parse_skel_decl ();

              break;
 
              break;
 

-           case PURE_PARSER:
-             pure_parser = 1;
+           case tok_noop:

              break;
 
              break;
 

-           case NOOP:
+           case tok_stropt:
+           case tok_intopt:
+           case tok_obsolete:
+             abort ();

              break;
 
              break;
 

+           case tok_illegal:

            default:
              complain (_("unrecognized: %s"), token_buffer);
              skip_to_char ('%');
            default:
              complain (_("unrecognized: %s"), token_buffer);
              skip_to_char ('%');


@@ -1043,20 +1131,18 @@ copy_action (symbol_list *rule, int stack_offset)
 {
   int c;
   int count;
 {
   int c;
   int count;

-  char buf[4096];

 
   /* offset is always 0 if parser has already popped the stack pointer */
   if (semantic_parser)
     stack_offset = 0;
 
 
   /* offset is always 0 if parser has already popped the stack pointer */
   if (semantic_parser)
     stack_offset = 0;
 

-  sprintf (buf, "\ncase %d:\n", nrules);
-  obstack_grow (&action_obstack, buf, strlen (buf));
+  obstack_fgrow1 (&action_obstack, "\ncase %d:\n", nrules);

 
   if (!no_lines_flag)
     {
 
   if (!no_lines_flag)
     {

-      sprintf (buf, "#line %d %s\n",
-              lineno, quotearg_style (c_quoting_style, infile));
-      obstack_grow (&action_obstack, buf, strlen (buf));
+      obstack_fgrow2 (&action_obstack, muscle_find ("linef"),
+                     lineno, quotearg_style (c_quoting_style,
+                                             muscle_find ("filename")));

     }
   obstack_1grow (&action_obstack, '{');
 
     }
   obstack_1grow (&action_obstack, '{');
 


@@ -1081,20 +1167,20 @@ copy_action (symbol_list *rule, int stack_offset)
 
            case '\'':
            case '"':
 
            case '\'':
            case '"':

-             copy_string (finput, 0, &action_obstack, c);
+             copy_string (finput, &action_obstack, c);

              break;
 
            case '/':
              break;
 
            case '/':

-             copy_comment (finput, 0, &action_obstack);
+             copy_comment (finput, &action_obstack);

              break;
 
            case '$':
              break;
 
            case '$':

-             copy_dollar (finput, 0, &action_obstack,
+             copy_dollar (finput, &action_obstack,

                           rule, stack_offset);
              break;
 
            case '@':
                           rule, stack_offset);
              break;
 
            case '@':

-             copy_at (finput, 0, &action_obstack,
+             copy_at (finput, &action_obstack,

                       stack_offset);
              break;
 
                       stack_offset);
              break;
 


@@ -1117,8 +1203,7 @@ copy_action (symbol_list *rule, int stack_offset)
        }
     }
 
        }
     }
 

-  obstack_grow_literal_string (&action_obstack,
-                              ";\n    break;}");
+  obstack_sgrow (&action_obstack, ";\n    break;}");

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


@@ -1141,11 +1226,12 @@ copy_guard (symbol_list *rule, int stack_offset)
   if (semantic_parser)
     stack_offset = 0;
 
   if (semantic_parser)
     stack_offset = 0;
 

-  fprintf (fguard, "\ncase %d:\n", nrules);
+  obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);

   if (!no_lines_flag)
   if (!no_lines_flag)

-    fprintf (fguard, "#line %d %s\n",
-            lineno, quotearg_style (c_quoting_style, infile));
-  putc ('{', fguard);
+    obstack_fgrow2 (&guard_obstack, muscle_find ("linef"),
+                   lineno, quotearg_style (c_quoting_style,
+                                           muscle_find ("filename")));
+  obstack_1grow (&guard_obstack, '{');

 
   count = 0;
   c = getc (finput);
 
   count = 0;
   c = getc (finput);


@@ -1155,18 +1241,18 @@ copy_guard (symbol_list *rule, int stack_offset)
       switch (c)
        {
        case '\n':
       switch (c)
        {
        case '\n':

-         putc (c, fguard);
+         obstack_1grow (&guard_obstack, c);

          lineno++;
          break;
 
        case '{':
          lineno++;
          break;
 
        case '{':

-         putc (c, fguard);
+         obstack_1grow (&guard_obstack, c);

          brace_flag = 1;
          count++;
          break;
 
        case '}':
          brace_flag = 1;
          count++;
          break;
 
        case '}':

-         putc (c, fguard);
+         obstack_1grow (&guard_obstack, c);

          if (count > 0)
            count--;
          else
          if (count > 0)
            count--;
          else


@@ -1178,26 +1264,26 @@ copy_guard (symbol_list *rule, int stack_offset)
 
        case '\'':
        case '"':
 
        case '\'':
        case '"':

-         copy_string (finput, fguard, 0, c);
+         copy_string (finput, &guard_obstack, c);

          break;
 
        case '/':
          break;
 
        case '/':

-         copy_comment (finput, fguard, 0);
+         copy_comment (finput, &guard_obstack);

          break;
 
        case '$':
          break;
 
        case '$':

-         copy_dollar (finput, fguard, 0, rule, stack_offset);
+         copy_dollar (finput, &guard_obstack, rule, stack_offset);

          break;
 
        case '@':
          break;
 
        case '@':

-         copy_at (finput, fguard, 0, stack_offset);
+         copy_at (finput, &guard_obstack, stack_offset);

          break;
 
        case EOF:
          fatal ("%s", _("unterminated %guard clause"));
 
        default:
          break;
 
        case EOF:
          fatal ("%s", _("unterminated %guard clause"));
 
        default:

-         putc (c, fguard);
+         obstack_1grow (&guard_obstack, c);

        }
 
       if (c != '}' || count != 0)
        }
 
       if (c != '}' || count != 0)


@@ -1206,7 +1292,7 @@ copy_guard (symbol_list *rule, int stack_offset)
 
   c = skip_white_space ();
 
 
   c = skip_white_space ();
 

-  fprintf (fguard, ";\n    break;}");
+  obstack_sgrow (&guard_obstack, ";\n    break;}");

   if (c == '{')
     copy_action (rule, stack_offset);
   else if (c == '=')
   if (c == '{')
     copy_action (rule, stack_offset);
   else if (c == '=')


@@ -1220,20 +1306,6 @@ copy_guard (symbol_list *rule, int stack_offset)
 }
 \f
 
 }
 \f
 

-static void
-record_rule_line (void)
-{
-  /* Record each rule's source line number in rline table.  */
-
-  if (nrules >= rline_allocated)
-    {
-      rline_allocated = nrules * 2;
-      rline = XREALLOC (rline, short, rline_allocated);
-    }
-  rline[nrules] = lineno;
-}
-
-

 /*-------------------------------------------------------------------.
 | Generate a dummy symbol, a nonterminal, whose name cannot conflict |
 | with the user's names.                                             |
 /*-------------------------------------------------------------------.
 | Generate a dummy symbol, a nonterminal, whose name cannot conflict |
 | with the user's names.                                             |


@@ -1242,9 +1314,14 @@ record_rule_line (void)
 static bucket *
 gensym (void)
 {
 static bucket *
 gensym (void)
 {

+  /* Incremented for each generated symbol */
+  static int gensym_count = 0;
+  static char buf[256];
+

   bucket *sym;
 
   bucket *sym;
 

-  sprintf (token_buffer, "@%d", ++gensym_count);
+  sprintf (buf, "@%d", ++gensym_count);
+  token_buffer = buf;

   sym = getsym (token_buffer);
   sym->class = nterm_sym;
   sym->value = nvars++;
   sym = getsym (token_buffer);
   sym->class = nterm_sym;
   sym->value = nvars++;


@@ -1262,12 +1339,12 @@ static int
 get_type (void)
 {
   int k;
 get_type (void)
 {
   int k;

-  int t;
+  token_t token;

   char *name;
 
   char *name;
 

-  t = lex ();
+  token = lex ();

 
 

-  if (t != TYPENAME)
+  if (token != tok_typename)

     {
       complain (_("invalid %s declaration"), "%type");
       return t;
     {
       complain (_("invalid %s declaration"), "%type");
       return t;


@@ -1277,17 +1354,17 @@ get_type (void)
 
   for (;;)
     {
 
   for (;;)
     {

-      t = lex ();
+      token = lex ();

 
 

-      switch (t)
+      switch (token)

        {
        {

-       case SEMICOLON:
+       case tok_semicolon:

          return lex ();
 
          return lex ();
 

-       case COMMA:
+       case tok_comma:

          break;
 
          break;
 

-       case IDENTIFIER:
+       case tok_identifier:

          if (symval->type_name == NULL)
            symval->type_name = name;
          else if (strcmp (name, symval->type_name) != 0)
          if (symval->type_name == NULL)
            symval->type_name = name;
          else if (strcmp (name, symval->type_name) != 0)


@@ -1296,7 +1373,7 @@ get_type (void)
          break;
 
        default:
          break;
 
        default:

-         return t;
+         return token;

        }
     }
 }
        }
     }
 }


@@ -1317,7 +1394,7 @@ get_type (void)
 static void
 readgram (void)
 {
 static void
 readgram (void)
 {

-  int t;
+  token_t t;

   bucket *lhs = NULL;
   symbol_list *p;
   symbol_list *p1;
   bucket *lhs = NULL;
   symbol_list *p;
   symbol_list *p1;


@@ -1333,9 +1410,9 @@ readgram (void)
 
   t = lex ();
 
 
   t = lex ();
 

-  while (t != TWO_PERCENTS && t != ENDFILE)
+  while (t != tok_two_percents && t != tok_eof)

     {
     {

-      if (t == IDENTIFIER || t == BAR)
+      if (t == tok_identifier || t == tok_bar)

        {
          int action_flag = 0;
          /* Number of symbols in rhs of this rule so far */
        {
          int action_flag = 0;
          /* Number of symbols in rhs of this rule so far */


@@ -1343,7 +1420,7 @@ readgram (void)
          int xactions = 0;     /* JF for error checking */
          bucket *first_rhs = 0;
 
          int xactions = 0;     /* JF for error checking */
          bucket *first_rhs = 0;
 

-         if (t == IDENTIFIER)
+         if (t == tok_identifier)

            {
              lhs = symval;
 
            {
              lhs = symval;
 


@@ -1354,14 +1431,14 @@ readgram (void)
                }
 
              t = lex ();
                }
 
              t = lex ();

-             if (t != COLON)
+             if (t != tok_colon)

                {
                  complain (_("ill-formed rule: initial symbol not followed by colon"));
                  unlex (t);
                }
            }
 
                {
                  complain (_("ill-formed rule: initial symbol not followed by colon"));
                  unlex (t);
                }
            }
 

-         if (nrules == 0 && t == BAR)
+         if (nrules == 0 && t == tok_bar)

            {
              complain (_("grammar starts with vertical bar"));
              lhs = symval;     /* BOGUS: use a random symval */
            {
              complain (_("grammar starts with vertical bar"));
              lhs = symval;     /* BOGUS: use a random symval */


@@ -1371,10 +1448,7 @@ readgram (void)
          nrules++;
          nitems++;
 
          nrules++;
          nitems++;
 

-         record_rule_line ();
-
-         p = XCALLOC (symbol_list, 1);
-         p->sym = lhs;
+         p = symbol_list_new (lhs);

 
          crule1 = p1;
          if (p1)
 
          crule1 = p1;
          if (p1)


@@ -1401,28 +1475,28 @@ readgram (void)
          for (;;)
            {
              t = lex ();
          for (;;)
            {
              t = lex ();

-             if (t == PREC)
+             if (t == tok_prec)

                {
                  t = lex ();
                  crule->ruleprec = symval;
                  t = lex ();
                }
 
                {
                  t = lex ();
                  crule->ruleprec = symval;
                  t = lex ();
                }
 

-             if (!(t == IDENTIFIER || t == LEFT_CURLY))
+             if (!(t == tok_identifier || t == tok_left_curly))

                break;
 
              /* If next token is an identifier, see if a colon follows it.
                 If one does, exit this rule now.  */
                break;
 
              /* If next token is an identifier, see if a colon follows it.
                 If one does, exit this rule now.  */

-             if (t == IDENTIFIER)
+             if (t == tok_identifier)

                {
                  bucket *ssave;
                {
                  bucket *ssave;

-                 int t1;
+                 token_t t1;

 
                  ssave = symval;
                  t1 = lex ();
                  unlex (t1);
                  symval = ssave;
 
                  ssave = symval;
                  t1 = lex ();
                  unlex (t1);
                  symval = ssave;

-                 if (t1 == COLON)
+                 if (t1 == tok_colon)

                    break;
 
                  if (!first_rhs)       /* JF */
                    break;
 
                  if (!first_rhs)       /* JF */


@@ -1436,47 +1510,45 @@ readgram (void)
                 non-terminal.  */
              if (action_flag)
                {
                 non-terminal.  */
              if (action_flag)
                {

-                 bucket *sdummy;
-

                  /* Since the action was written out with this rule's
                     number, we must give the new rule this number by
                     inserting the new rule before it.  */
 
                  /* Make a dummy nonterminal, a gensym.  */
                  /* Since the action was written out with this rule's
                     number, we must give the new rule this number by
                     inserting the new rule before it.  */
 
                  /* Make a dummy nonterminal, a gensym.  */

-                 sdummy = gensym ();
+                 bucket *sdummy = gensym ();

 
 

-                 /* Make a new rule, whose body is empty,
-                    before the current one, so that the action
-                    just read can belong to it.  */
+                 /* Make a new rule, whose body is empty, before the
+                    current one, so that the action just read can
+                    belong to it.  */

                  nrules++;
                  nitems++;
                  nrules++;
                  nitems++;

-                 record_rule_line ();
-                 p = XCALLOC (symbol_list, 1);
+                 p = symbol_list_new (sdummy);
+                 /* Attach its lineno to that of the host rule. */
+                 p->line = crule->line;

                  if (crule1)
                    crule1->next = p;
                  else
                    grammar = p;
                  if (crule1)
                    crule1->next = p;
                  else
                    grammar = p;

-                 p->sym = sdummy;
-                 crule1 = XCALLOC (symbol_list, 1);
-                 p->next = crule1;
+                 /* End of the rule. */
+                 crule1 = symbol_list_new (NULL);

                  crule1->next = crule;
 
                  crule1->next = crule;
 

+                 p->next = crule1;
+

                  /* Insert the dummy generated by that rule into this
                     rule.  */
                  nitems++;
                  /* Insert the dummy generated by that rule into this
                     rule.  */
                  nitems++;

-                 p = XCALLOC (symbol_list, 1);
-                 p->sym = sdummy;
+                 p = symbol_list_new (sdummy);

                  p1->next = p;
                  p1 = p;
 
                  action_flag = 0;
                }
 
                  p1->next = p;
                  p1 = p;
 
                  action_flag = 0;
                }
 

-             if (t == IDENTIFIER)
+             if (t == tok_identifier)

                {
                  nitems++;
                {
                  nitems++;

-                 p = XCALLOC (symbol_list, 1);
-                 p->sym = symval;
+                 p = symbol_list_new (symval);

                  p1->next = p;
                  p1 = p;
                }
                  p1->next = p;
                  p1 = p;
                }


@@ -1490,18 +1562,18 @@ readgram (void)
            }                   /* end of  read rhs of rule */
 
          /* Put an empty link in the list to mark the end of this rule  */
            }                   /* end of  read rhs of rule */
 
          /* Put an empty link in the list to mark the end of this rule  */

-         p = XCALLOC (symbol_list, 1);
+         p = symbol_list_new (NULL);

          p1->next = p;
          p1 = p;
 
          p1->next = p;
          p1 = p;
 

-         if (t == PREC)
+         if (t == tok_prec)

            {
              complain (_("two @prec's in a row"));
              t = lex ();
              crule->ruleprec = symval;
              t = lex ();
            }
            {
              complain (_("two @prec's in a row"));
              t = lex ();
              crule->ruleprec = symval;
              t = lex ();
            }

-         if (t == GUARD)
+         if (t == tok_guard)

            {
              if (!semantic_parser)
                complain (_("%%guard present but %%semantic_parser not specified"));
            {
              if (!semantic_parser)
                complain (_("%%guard present but %%semantic_parser not specified"));


@@ -1509,7 +1581,7 @@ readgram (void)
              copy_guard (crule, rulelength);
              t = lex ();
            }
              copy_guard (crule, rulelength);
              t = lex ();
            }

-         else if (t == LEFT_CURLY)
+         else if (t == tok_left_curly)

            {
              /* This case never occurs -wjh */
              if (action_flag)
            {
              /* This case never occurs -wjh */
              if (action_flag)


@@ -1534,7 +1606,7 @@ readgram (void)
          /* Warn if there is no default for $$ but we need one.  */
          else if (!xactions && !first_rhs && lhs->type_name != 0)
            complain (_("empty rule for typed nonterminal, and no action"));
          /* Warn if there is no default for $$ but we need one.  */
          else if (!xactions && !first_rhs && lhs->type_name != 0)
            complain (_("empty rule for typed nonterminal, and no action"));

-         if (t == SEMICOLON)
+         if (t == tok_semicolon)

            t = lex ();
        }
 #if 0
            t = lex ();
        }
 #if 0


@@ -1544,31 +1616,31 @@ readgram (void)
        b) most of them scan forward until finding a next %
                thus they may swallow lots of intervening rules
 */
        b) most of them scan forward until finding a next %
                thus they may swallow lots of intervening rules
 */

-      else if (t == TOKEN)
+      else if (t == tok_token)

        {
          parse_token_decl (token_sym, nterm_sym);
          t = lex ();
        }
        {
          parse_token_decl (token_sym, nterm_sym);
          t = lex ();
        }

-      else if (t == NTERM)
+      else if (t == tok_nterm)

        {
          parse_token_decl (nterm_sym, token_sym);
          t = lex ();
        }
        {
          parse_token_decl (nterm_sym, token_sym);
          t = lex ();
        }

-      else if (t == TYPE)
+      else if (t == tok_type)

        {
          t = get_type ();
        }
        {
          t = get_type ();
        }

-      else if (t == UNION)
+      else if (t == tok_union)

        {
          parse_union_decl ();
          t = lex ();
        }
        {
          parse_union_decl ();
          t = lex ();
        }

-      else if (t == EXPECT)
+      else if (t == tok_expect)

        {
          parse_expect_decl ();
          t = lex ();
        }
        {
          parse_expect_decl ();
          t = lex ();
        }

-      else if (t == START)
+      else if (t == tok_start)

        {
          parse_start_decl ();
          t = lex ();
        {
          parse_start_decl ();
          t = lex ();


@@ -1577,7 +1649,7 @@ readgram (void)
 
       else
        {
 
       else
        {

-         complain (_("invalid input: %s"), token_buffer);
+         complain (_("invalid input: %s"), quote (token_buffer));

          t = lex ();
        }
     }
          t = lex ();
        }
     }


@@ -1590,22 +1662,6 @@ readgram (void)
   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 
   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 

-  /* JF put out same default YYSTYPE as YACC does */
-  if (typed == 0
-      && !value_components_used)
-    {
-      /* We used to use `unsigned long' as YYSTYPE on MSDOS,
-         but it seems better to be consistent.
-         Most programs should declare their own type anyway.  */
-      obstack_grow_literal_string (&attrs_obstack,
-                           "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
-      if (defines_flag)
-       obstack_grow_literal_string (&defines_obstack, "\
-#ifndef YYSTYPE\n\
-# define YYSTYPE int\n\
-#endif\n");
-    }
-

   /* Report any undefined symbols and consider them nonterminals.  */
 
   for (bp = firstsymbol; bp; bp = bp->next)
   /* Report any undefined symbols and consider them nonterminals.  */
 
   for (bp = firstsymbol; bp; bp = bp->next)


@@ -1620,6 +1676,32 @@ readgram (void)
 
   ntokens = nsyms - nvars;
 }
 
   ntokens = nsyms - nvars;
 }

+
+/* At the end of the grammar file, some C source code must
+   be stored. It is going to be associated to the epilogue
+   directive.  */
+static void
+read_additionnal_code (void)
+{
+  char c;
+  struct obstack el_obstack;
+
+  obstack_init (&el_obstack);
+
+  if (!no_lines_flag)
+    {
+      obstack_fgrow2 (&el_obstack, muscle_find ("linef"),
+                     lineno, quotearg_style (c_quoting_style,
+                                             muscle_find("filename")));
+    }
+
+  while ((c = getc (finput)) != EOF)
+    obstack_1grow (&el_obstack, c);
+
+  obstack_1grow (&el_obstack, 0);
+  muscle_insert ("epilogue", obstack_finish (&el_obstack));
+}
+

 \f
 /*--------------------------------------------------------------.
 | For named tokens, but not literal ones, define the name.  The |
 \f
 /*--------------------------------------------------------------.
 | For named tokens, but not literal ones, define the name.  The |


@@ -1660,15 +1742,53 @@ output_token_defines (struct obstack *oout)
       if (c != '\0')
        continue;
 
       if (c != '\0')
        continue;
 

-      obstack_fgrow2 (oout, "#define\t%s\t%d\n",
-                     symbol,
-                     ((translations && !raw_flag)
-                      ? bp->user_token_number : bp->value));
+      obstack_fgrow2 (oout, "# define\t%s\t%d\n",
+                     symbol, bp->user_token_number);

       if (semantic_parser)
       if (semantic_parser)

-       obstack_fgrow2 (oout, "#define\tT%s\t%d\n", symbol, bp->value);
+       /* FIXME: This is certainly dead wrong, and should be just as
+          above. --akim.  */
+       obstack_fgrow2 (oout, "# define\tT%s\t%d\n", symbol, bp->value);

     }
     }

+}
+
+
+/*------------------------------------------------------------------.
+| Set TOKEN_TRANSLATIONS.  Check that no two symbols share the same |
+| number.                                                           |
+`------------------------------------------------------------------*/
+
+static void
+token_translations_init (void)
+{
+  bucket *bp = NULL;
+  int i;
+
+  token_translations = XCALLOC (short, max_user_token_number + 1);

 
 

-  obstack_1grow (oout, '\n');
+  /* Initialize all entries for literal tokens to 2, the internal
+     token number for $undefined., which represents all invalid
+     inputs.  */
+  for (i = 0; i <= max_user_token_number; i++)
+    token_translations[i] = 2;
+
+  for (bp = firstsymbol; bp; bp = bp->next)
+    {
+      /* Non-terminal? */
+      if (bp->value >= ntokens)
+       continue;
+      /* A token string alias? */
+      if (bp->user_token_number == SALIAS)
+       continue;
+
+      assert (bp->user_token_number != SUNDEF);
+
+      /* A token which translation has already been set? */
+      if (token_translations[bp->user_token_number] != 2)
+       complain (_("tokens %s and %s both assigned number %d"),
+                 tags[token_translations[bp->user_token_number]],
+                 bp->tag, bp->user_token_number);
+      token_translations[bp->user_token_number] = bp->value;
+    }

 }
 
 
 }
 
 


@@ -1681,22 +1801,21 @@ output_token_defines (struct obstack *oout)
 static void
 packsymbols (void)
 {
 static void
 packsymbols (void)
 {

-  bucket *bp;
+  bucket *bp = NULL;

   int tokno = 1;
   int tokno = 1;

-  int i;

   int last_user_token_number;
   static char DOLLAR[] = "$";
 
   int last_user_token_number;
   static char DOLLAR[] = "$";
 

-  /* int lossage = 0; JF set but not used */
-

   tags = XCALLOC (char *, nsyms + 1);
   tags = XCALLOC (char *, nsyms + 1);

-  tags[0] = DOLLAR;

   user_toknums = XCALLOC (short, nsyms + 1);
   user_toknums = XCALLOC (short, nsyms + 1);

-  user_toknums[0] = 0;

 
   sprec = XCALLOC (short, nsyms);
   sassoc = XCALLOC (short, nsyms);
 
 
   sprec = XCALLOC (short, nsyms);
   sassoc = XCALLOC (short, nsyms);
 

+  /* The EOF token. */
+  tags[0] = DOLLAR;
+  user_toknums[0] = 0;
+

   max_user_token_number = 256;
   last_user_token_number = 256;
 
   max_user_token_number = 256;
   last_user_token_number = 256;
 


@@ -1749,7 +1868,7 @@ packsymbols (void)
 
       if (bp->class == token_sym)
        {
 
       if (bp->class == token_sym)
        {

-         if (translations && !(bp->user_token_number))
+         if (bp->user_token_number == SUNDEF)

            bp->user_token_number = ++last_user_token_number;
          if (bp->user_token_number > max_user_token_number)
            max_user_token_number = bp->user_token_number;
            bp->user_token_number = ++last_user_token_number;
          if (bp->user_token_number > max_user_token_number)
            max_user_token_number = bp->user_token_number;


@@ -1759,75 +1878,62 @@ packsymbols (void)
       user_toknums[bp->value] = bp->user_token_number;
       sprec[bp->value] = bp->prec;
       sassoc[bp->value] = bp->assoc;
       user_toknums[bp->value] = bp->user_token_number;
       sprec[bp->value] = bp->prec;
       sassoc[bp->value] = bp->assoc;

-

     }
 
     }
 

-  if (translations)
-    {
-      int j;
-
-      token_translations = XCALLOC (short, max_user_token_number + 1);
-
-      /* initialize all entries for literal tokens to 2, the internal
-         token number for $undefined., which represents all invalid
-         inputs.  */
-      for (j = 0; j <= max_user_token_number; j++)
-       token_translations[j] = 2;
-
-      for (bp = firstsymbol; bp; bp = bp->next)
-       {
-         if (bp->value >= ntokens)
-           continue;           /* non-terminal */
-         if (bp->user_token_number == SALIAS)
-           continue;
-         if (token_translations[bp->user_token_number] != 2)
-           complain (_("tokens %s and %s both assigned number %d"),
-                     tags[token_translations[bp->user_token_number]],
-                     bp->tag, bp->user_token_number);
-         token_translations[bp->user_token_number] = bp->value;
-       }
-    }
+  token_translations_init ();

 
   error_token_number = errtoken->value;
 
 
   error_token_number = errtoken->value;
 

-  if (!no_parser_flag)
-    output_token_defines (&table_obstack);
-

   if (startval->class == unknown_sym)
     fatal (_("the start symbol %s is undefined"), startval->tag);
   else if (startval->class == token_sym)
     fatal (_("the start symbol %s is a token"), startval->tag);
 
   start_symbol = startval->value;
   if (startval->class == unknown_sym)
     fatal (_("the start symbol %s is undefined"), startval->tag);
   else if (startval->class == token_sym)
     fatal (_("the start symbol %s is a token"), startval->tag);
 
   start_symbol = startval->value;

+}
+
+
+/*-----------------------------------.
+| Output definition of token names.  |
+`-----------------------------------*/
+
+static void
+symbols_output (void)
+{
+  {
+    struct obstack tokendefs;
+    obstack_init (&tokendefs);
+    output_token_defines (&tokendefs);
+    obstack_1grow (&tokendefs, 0);
+    muscle_insert ("tokendef", xstrdup (obstack_finish (&tokendefs)));
+    obstack_free (&tokendefs, NULL);
+  }

 
   if (defines_flag)
     {
       output_token_defines (&defines_obstack);
 
       if (!pure_parser)
 
   if (defines_flag)
     {
       output_token_defines (&defines_obstack);
 
       if (!pure_parser)

+       obstack_fgrow1 (&defines_obstack, "\nextern YYSTYPE %slval;\n",
+                       spec_name_prefix);
+      if (semantic_parser)

        {
        {

-         if (spec_name_prefix)
-           obstack_fgrow1 (&defines_obstack, "\nextern YYSTYPE %slval;\n",
-                           spec_name_prefix);
-         else
-           obstack_grow_literal_string (&defines_obstack,
-                                        "\nextern YYSTYPE yylval;\n");
-       }
+         int i;

 
 

-      if (semantic_parser)
-       for (i = ntokens; i < nsyms; i++)
-         {
-           /* don't make these for dummy nonterminals made by gensym.  */
-           if (*tags[i] != '@')
-              obstack_fgrow2 (&defines_obstack,
-                              "#define\tNT%s\t%d\n", tags[i], i);
-         }
+         for (i = ntokens; i < nsyms; i++)
+           {
+             /* don't make these for dummy nonterminals made by gensym.  */
+             if (*tags[i] != '@')
+               obstack_fgrow2 (&defines_obstack,
+                               "# define\tNT%s\t%d\n", tags[i], i);
+           }

 #if 0
 #if 0

-      /* `fdefines' is now a temporary file, so we need to copy its
-         contents in `done', so we can't close it here.  */
-      fclose (fdefines);
-      fdefines = NULL;
+         /* `fdefines' is now a temporary file, so we need to copy its
+            contents in `done', so we can't close it here.  */
+         fclose (fdefines);
+         fdefines = NULL;

 #endif
 #endif

+       }

     }
 }
 
     }
 }
 


@@ -1844,14 +1950,8 @@ packgram (void)
   int ruleno;
   symbol_list *p;
 
   int ruleno;
   symbol_list *p;
 

-  bucket *ruleprec;
-

   ritem = XCALLOC (short, nitems + 1);
   ritem = XCALLOC (short, nitems + 1);

-  rlhs = XCALLOC (short, nrules) - 1;
-  rrhs = XCALLOC (short, nrules) - 1;
-  rprec = XCALLOC (short, nrules) - 1;
-  rprecsym = XCALLOC (short, nrules) - 1;
-  rassoc = XCALLOC (short, nrules) - 1;
+  rule_table = XCALLOC (rule_t, nrules) - 1;

 
   itemno = 0;
   ruleno = 1;
 
   itemno = 0;
   ruleno = 1;


@@ -1859,9 +1959,11 @@ packgram (void)
   p = grammar;
   while (p)
     {
   p = grammar;
   while (p)
     {

-      rlhs[ruleno] = p->sym->value;
-      rrhs[ruleno] = itemno;
-      ruleprec = p->ruleprec;
+      bucket *ruleprec = p->ruleprec;
+      rule_table[ruleno].lhs = p->sym->value;
+      rule_table[ruleno].rhs = itemno;
+      rule_table[ruleno].line = p->line;
+      rule_table[ruleno].useful = TRUE;

 
       p = p->next;
       while (p && p->sym)
 
       p = p->next;
       while (p && p->sym)


@@ -1871,8 +1973,8 @@ packgram (void)
             of the last token in it.  */
          if (p->sym->class == token_sym)
            {
             of the last token in it.  */
          if (p->sym->class == token_sym)
            {

-             rprec[ruleno] = p->sym->prec;
-             rassoc[ruleno] = p->sym->assoc;
+             rule_table[ruleno].prec = p->sym->prec;
+             rule_table[ruleno].assoc = p->sym->assoc;

            }
          if (p)
            p = p->next;
            }
          if (p)
            p = p->next;


@@ -1882,9 +1984,9 @@ packgram (void)
          the specified symbol's precedence replaces the default.  */
       if (ruleprec)
        {
          the specified symbol's precedence replaces the default.  */
       if (ruleprec)
        {

-         rprec[ruleno] = ruleprec->prec;
-         rassoc[ruleno] = ruleprec->assoc;
-         rprecsym[ruleno] = ruleprec->value;
+         rule_table[ruleno].prec = ruleprec->prec;
+         rule_table[ruleno].assoc = ruleprec->assoc;
+         rule_table[ruleno].precsym = ruleprec->value;

        }
 
       ritem[itemno++] = -ruleno;
        }
 
       ritem[itemno++] = -ruleno;


@@ -1895,11 +1997,14 @@ packgram (void)
     }
 
   ritem[itemno] = 0;
     }
 
   ritem[itemno] = 0;

+
+  if (trace_flag)
+    ritem_print (stderr);

 }
 \f
 /*-------------------------------------------------------------------.
 | Read in the grammar specification and record it in the format      |
 }
 \f
 /*-------------------------------------------------------------------.
 | Read in the grammar specification and record it in the format      |

-| described in gram.h.  All guards are copied into the FGUARD file   |
+| described in gram.h.  All guards are copied into the GUARD_OBSTACK |

 | and all actions into ACTION_OBSTACK, in each case forming the body |
 | of a C function (YYGUARD or YYACTION) which contains a switch      |
 | statement to decide which guard or action to execute.              |
 | and all actions into ACTION_OBSTACK, in each case forming the body |
 | of a C function (YYGUARD or YYACTION) which contains a switch      |
 | statement to decide which guard or action to execute.              |


@@ -1911,41 +2016,33 @@ reader (void)
   start_flag = 0;
   startval = NULL;             /* start symbol not specified yet. */
 
   start_flag = 0;
   startval = NULL;             /* start symbol not specified yet. */
 

-#if 0
-  /* initially assume token number translation not needed.  */
-  translations = 0;
-#endif
-  /* Nowadays translations is always set to 1, since we give `error' a
-     user-token-number to satisfy the Posix demand for YYERRCODE==256.
-   */
-  translations = 1;
-

   nsyms = 1;
   nvars = 0;
   nrules = 0;
   nitems = 0;
   nsyms = 1;
   nvars = 0;
   nrules = 0;
   nitems = 0;

-  rline_allocated = 10;
-  rline = XCALLOC (short, rline_allocated);

 
   typed = 0;
   lastprec = 0;
 
 
   typed = 0;
   lastprec = 0;
 

-  gensym_count = 0;
-

   semantic_parser = 0;
   pure_parser = 0;
 
   grammar = NULL;
 
   semantic_parser = 0;
   pure_parser = 0;
 
   grammar = NULL;
 

-  init_lex ();
+  lex_init ();

   lineno = 1;
 
   lineno = 1;
 

+  /* Initialize the muscle obstack.  */
+  obstack_init (&muscle_obstack);
+

   /* Initialize the symbol table.  */
   tabinit ();
   /* Initialize the symbol table.  */
   tabinit ();

+

   /* Construct the error token */
   errtoken = getsym ("error");
   errtoken->class = token_sym;
   errtoken->user_token_number = 256;   /* Value specified by POSIX.  */
   /* Construct the error token */
   errtoken = getsym ("error");
   errtoken->class = token_sym;
   errtoken->user_token_number = 256;   /* Value specified by POSIX.  */

+

   /* Construct a token that represents all undefined literal tokens.
      It is always token number 2.  */
   undeftoken = getsym ("$undefined.");
   /* Construct a token that represents all undefined literal tokens.
      It is always token number 2.  */
   undeftoken = getsym ("$undefined.");


@@ -1955,63 +2052,22 @@ reader (void)
   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */
   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */

-  obstack_1grow (&table_obstack, '\n');
-  obstack_fgrow3 (&table_obstack, "\
-/* %s, made from %s\n\
-   by GNU bison %s.  */\n\
-\n",
-                 no_parser_flag ? "Bison-generated parse tables" : "A Bison parser",
-                 infile, VERSION);
-
-  obstack_grow_literal_string (&table_obstack,
-                      "#define YYBISON 1  /* Identify Bison output.  */\n\n");

   read_declarations ();
   read_declarations ();

-  /* Start writing the guard and action files, if they are needed.  */
-  output_headers ();

   /* Read in the grammar, build grammar in list form.  Write out
      guards and actions.  */
   readgram ();
   /* Read in the grammar, build grammar in list form.  Write out
      guards and actions.  */
   readgram ();

+  /* Some C code is given at the end of the grammar file. */
+  read_additionnal_code ();
+

   /* Now we know whether we need the line-number stack.  If we do,
   /* Now we know whether we need the line-number stack.  If we do,

-     write its type into the .tab.h file.  */
-  if (defines_flag)
-    reader_output_yylsp (&defines_obstack);
-  /* Write closing delimiters for actions and guards.  */
-  output_trailers ();
-  if (locations_flag)
-    obstack_grow_literal_string (&table_obstack, "#define YYLSP_NEEDED 1\n\n");
+     write its type into the .tab.h file.
+     This is no longer need with header skeleton.  */
+

   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();
   /* Convert the grammar into the format described in gram.h.  */
   packgram ();
   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();
   /* Convert the grammar into the format described in gram.h.  */
   packgram ();

-  /* Free the symbol table data structure since symbols are now all
-     referred to by symbol number.  */
-  free_symtab ();
-}
-
-
-/*------------------------------------------------------------------.
-| Define YYLTYPE.  Cannot be in the skeleton since we might have to |
-| output it in the headers if --defines is used.                    |
-`------------------------------------------------------------------*/
-
-void
-reader_output_yylsp (struct obstack *oout)
-{
-  if (locations_flag)
-    obstack_grow_literal_string (oout, "\
-\n\
-#ifndef YYLTYPE\n\
-typedef struct yyltype\n\
-{\n\
-  int first_line;\n\
-  int first_column;\n\
-\n\
-  int last_line;\n\
-  int last_column;\n\
-} yyltype;\n\
-\n\
-# define YYLTYPE yyltype\n\
-#endif\n\
-\n");
+  /* Output the headers. */
+  symbols_output ();

 }
 }