* src/LR0.c, src/conflicts.c, src/lalr.c, src/lalr.h, src/output.c

[bison.git] / src / reader.c

diff --git a/src/reader.c b/src/reader.c
index 03c0d31197ea3ee3902ca5eceaeacb2b8c799750..d76bd6feea7a6a71c7b7642d781026e9b95d1048 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -21,7 +21,6 @@
 
 
 #include "system.h"
 
 
 #include "system.h"

-#include "obstack.h"

 #include "quotearg.h"
 #include "quote.h"
 #include "getargs.h"
 #include "quotearg.h"
 #include "quote.h"
 #include "getargs.h"


@@ -36,20 +35,23 @@
 #include "conflicts.h"
 #include "muscle_tab.h"
 
 #include "conflicts.h"
 #include "muscle_tab.h"
 

-/* Number of slots allocated (but not necessarily used yet) in `rline'  */
-static int rline_allocated;
-

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

+  int line;
+
+  /* The action is attached to the LHS of a rule. */
+  const char *action;
+  int action_line;
+
+  /* The guard is attached to the LHS of a rule. */
+  const char *guard;
+  int guard_line;

   bucket *ruleprec;
   bucket *ruleprec;

-}
-symbol_list;
+} symbol_list;

 
 int lineno;
 
 int lineno;

-char **tags;
-short *user_toknums;

 static symbol_list *grammar;
 static int start_flag;
 static bucket *startval;
 static symbol_list *grammar;
 static int start_flag;
 static bucket *startval;


@@ -64,8 +66,26 @@ 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;
 

-static bucket *errtoken;
-static bucket *undeftoken;
+static bucket *errtoken = NULL;
+static bucket *undeftoken = NULL;
+static bucket *eoftoken = NULL;
+static bucket *axiom = NULL;
+
+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->action = NULL;
+  res->action_line = 0;
+  res->guard = NULL;
+  res->guard_line = 0;
+  res->ruleprec = NULL;
+  return res;
+}
+

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


@@ -123,7 +143,7 @@ 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;


@@ -219,25 +239,22 @@ copy_identifier (FILE *fin, struct obstack *oout)
   ungetc (c, fin);
 }
 
   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.                                              |
-`-----------------------------------------------------------------*/
+
+/*------------------------------------------------------------------.
+| Dump the wannabee comment from IN to OOUT.  In fact we just saw a |
+| `/', which might or might not be a comment.  In any case, copy    |
+| what we saw.                                                      |
+`------------------------------------------------------------------*/

 
 static inline void
 
 static inline void

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

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

-  obstack_1grow (oout1, '/');
-  if (oout2)
-    obstack_1grow (oout2, '/');
+  obstack_1grow (oout, '/');

 
   switch ((c = getc (fin)))
     {
 
   switch ((c = getc (fin)))
     {


@@ -252,9 +269,7 @@ copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
       return;
     }
 
       return;
     }
 

-  obstack_1grow (oout1, c);
-  if (oout2)
-    obstack_1grow (oout2, c);
+  obstack_1grow (oout, c);

   c = getc (fin);
 
   ended = 0;
   c = getc (fin);
 
   ended = 0;


@@ -264,26 +279,20 @@ copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
        {
          while (c == '*')
            {
        {
          while (c == '*')
            {

-             obstack_1grow (oout1, c);
-             if (oout2)
-               obstack_1grow (oout2, c);
+             obstack_1grow (oout, c);

              c = getc (fin);
            }
 
          if (c == '/')
            {
              c = getc (fin);
            }
 
          if (c == '/')
            {

-             obstack_1grow (oout1, c);
-             if (oout2)
-               obstack_1grow (oout2, c);
+             obstack_1grow (oout, c);

              ended = 1;
            }
        }
       else if (c == '\n')
        {
          lineno++;
              ended = 1;
            }
        }
       else if (c == '\n')
        {
          lineno++;

-         obstack_1grow (oout1, c);
-         if (oout2)
-           obstack_1grow (oout2, c);
+         obstack_1grow (oout, c);

          if (cplus_comment)
            ended = 1;
          else
          if (cplus_comment)
            ended = 1;
          else


@@ -293,27 +302,13 @@ copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
        fatal (_("unterminated comment"));
       else
        {
        fatal (_("unterminated comment"));
       else
        {

-         obstack_1grow (oout1, c);
-         if (oout2)
-           obstack_1grow (oout2, c);
+         obstack_1grow (oout, c);

          c = getc (fin);
        }
     }
 }
 
 
          c = getc (fin);
        }
     }
 }
 
 

-/*-------------------------------------------------------------------.
-| Dump the comment (actually the current string starting with a `/') |
-| from FIN to OOUT.                                                  |
-`-------------------------------------------------------------------*/
-
-static inline void
-copy_comment (FILE *fin, struct obstack *oout)
-{
-  copy_comment2 (fin, oout, NULL);
-}
-
-

 /*-----------------------------------------------------------------.
 | FIN is pointing to a location (i.e., a `@').  Output to OOUT a   |
 | reference to this location. STACK_OFFSET is the number of values |
 /*-----------------------------------------------------------------.
 | FIN is pointing to a location (i.e., a `@').  Output to OOUT a   |
 | reference to this location. STACK_OFFSET is the number of values |


@@ -338,9 +333,16 @@ copy_at (FILE *fin, struct obstack *oout, int stack_offset)
 
       ungetc (c, fin);
       n = read_signed_integer (fin);
 
       ungetc (c, fin);
       n = read_signed_integer (fin);

-
-      obstack_fgrow1 (oout, "yylsp[%d]", n - stack_offset);
-      locations_flag = 1;
+      if (n > stack_offset)
+       complain (_("invalid value: %s%d"), "@", n);
+      else
+       {
+         /* Offset is always 0 if parser has already popped the stack
+            pointer.  */
+         obstack_fgrow1 (oout, "yylsp[%d]",
+                         n - (semantic_parser ? 0 : stack_offset));
+         locations_flag = 1;
+       }

     }
   else
     {
     }
   else
     {


@@ -395,16 +397,24 @@ copy_dollar (FILE *fin, struct obstack *oout,
       ungetc (c, fin);
       n = read_signed_integer (fin);
 
       ungetc (c, fin);
       n = read_signed_integer (fin);
 

-      if (!type_name && n > 0)
-       type_name = get_type_name (n, rule);
-
-      obstack_fgrow1 (oout, "yyvsp[%d]", n - stack_offset);
-
-      if (type_name)
-       obstack_fgrow1 (oout, ".%s", type_name);
-      if (!type_name && typed)
-       complain (_("$%d of `%s' has no declared type"),
-                 n, rule->sym->tag);
+      if (n > stack_offset)
+       complain (_("invalid value: %s%d"), "$", n);
+      else
+       {
+         if (!type_name && n > 0)
+           type_name = get_type_name (n, rule);
+
+         /* Offset is always 0 if parser has already popped the stack
+            pointer.  */
+         obstack_fgrow1 (oout, "yyvsp[%d]",
+                         n - (semantic_parser ? 0 : stack_offset));
+
+         if (type_name)
+           obstack_fgrow1 (oout, ".%s", type_name);
+         if (!type_name && typed)
+           complain (_("$%d of `%s' has no declared type"),
+                     n, rule->sym->tag);
+       }

     }
   else
     {
     }
   else
     {


@@ -426,14 +436,12 @@ copy_definition (void)
   /* -1 while reading a character if prev char was %. */
   int after_percent;
 
   /* -1 while reading a character if prev char was %. */
   int after_percent;
 

-#if 0

   if (!no_lines_flag)
     {
       obstack_fgrow2 (&attrs_obstack, muscle_find ("linef"),
                      lineno, quotearg_style (c_quoting_style,
   if (!no_lines_flag)
     {
       obstack_fgrow2 (&attrs_obstack, muscle_find ("linef"),
                      lineno, quotearg_style (c_quoting_style,

-                                             muscle_find("filename")));
+                                             muscle_find ("filename")));

     }
     }

-#endif

 
   after_percent = 0;
 
 
   after_percent = 0;
 


@@ -564,11 +572,15 @@ parse_token_decl (symbol_class what_is, symbol_class what_is_not)
       else if (symbol && token == tok_number)
        {
          symbol->user_token_number = numval;
       else if (symbol && token == tok_number)
        {
          symbol->user_token_number = numval;

+         /* User defined EOF token? */
+         if (numval == 0)
+           eoftoken = symbol;

        }
       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 ('%');
        }
     }


@@ -740,34 +752,23 @@ parse_union_decl (void)
 {
   int c;
   int count = 0;
 {
   int c;
   int count = 0;

+  bool done = FALSE;

   struct obstack union_obstack;
   struct obstack union_obstack;

-

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

-  /* FIXME: I'm worried: are you sure attrs_obstack is properly
-     filled?  */
-  if (no_lines_flag)
-    obstack_1grow (&attrs_obstack, '\n');
-

   obstack_init (&union_obstack);
   obstack_sgrow (&union_obstack, "union");
   obstack_init (&union_obstack);
   obstack_sgrow (&union_obstack, "union");

-  if (defines_flag)
-    obstack_sgrow (&defines_obstack, "typedef union");
-
-  c = getc (finput);

 
 

-  while (c != EOF)
+  while (!done)

     {
     {

+      c = xgetc (finput);
+

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

 
       switch (c)
        {
 
       switch (c)
        {


@@ -776,7 +777,7 @@ parse_union_decl (void)
          break;
 
        case '/':
          break;
 
        case '/':

-         copy_comment2 (finput, &defines_obstack, &union_obstack);
+         copy_comment (finput, &union_obstack);

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


@@ -784,26 +785,22 @@ parse_union_decl (void)
          break;
 
        case '}':
          break;
 
        case '}':

+         /* FIXME: Errr.  How could this happen???. --akim */

          if (count == 0)
            complain (_("unmatched %s"), "`}'");
          count--;
          if (count == 0)
            complain (_("unmatched %s"), "`}'");
          count--;

-         if (count <= 0)
-           {
-             if (defines_flag)
-               obstack_sgrow (&defines_obstack, " YYSTYPE;\n");
-             /* 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;
-           }
+         if (!count)
+           done = TRUE;
+         break;

        }
        }

-
-      c = getc (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));

 }
 
 
 }
 
 


@@ -902,12 +899,13 @@ parse_thong_decl (void)
   nsyms--;
 }
 
   nsyms--;
 }
 

+

 static void
 parse_muscle_decl (void)
 {
   int ch = ungetc (skip_white_space (), finput);
 static void
 parse_muscle_decl (void)
 {
   int ch = ungetc (skip_white_space (), finput);

-  char* muscle_key;
-  char* muscle_value;
+  char *muscle_key;
+  char *muscle_value;

 
   /* Read key. */
   if (!isalpha (ch) && ch != '_')
 
   /* Read key. */
   if (!isalpha (ch) && ch != '_')


@@ -943,14 +941,55 @@ parse_muscle_decl (void)
 }
 
 
 }
 
 

+
+/*---------------------------------.
+| 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;
+    }
+
+  while ((c = literalchar ()) != '"')
+    obstack_1grow (&param_obstack, c);
+
+  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. |
 `----------------------------------*/
 
 /*----------------------------------.
 | Parse what comes after %skeleton. |
 `----------------------------------*/
 

-void
+static void

 parse_skel_decl (void)
 {
 parse_skel_decl (void)
 {

-  /* Complete with parse_dquoted_param () on the CVS branch 1.29.  */
+  skeleton = parse_dquoted_param ("%skeleton");

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


@@ -1033,10 +1072,10 @@ read_declarations (void)
            case tok_stropt:
            case tok_intopt:
            case tok_obsolete:
            case tok_stropt:
            case tok_intopt:
            case tok_obsolete:

-           case tok_illegal:

              abort ();
              break;
 
              abort ();
              break;
 

+           case tok_illegal:

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


@@ -1059,79 +1098,61 @@ read_declarations (void)
 | matching `}' into the actions file.  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.                              |
 | matching `}' into the actions file.  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.                              |

+|                                                                    |
+| This routine is used both for actions and guards.  Only            |
+| ACTION_OBSTACK is used, but this is fine, since we use only        |
+| pointers to relevant portions inside this obstack.                 |

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

-copy_action (symbol_list *rule, int stack_offset)
+parse_braces (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;
-
-  obstack_fgrow1 (&action_obstack, "\ncase %d:\n", nrules);
-
-  if (!no_lines_flag)
-    {
-      obstack_fgrow2 (&action_obstack, muscle_find ("linef"),
-                     lineno, quotearg_style (c_quoting_style,
-                                             muscle_find ("filename")));
-    }
-  obstack_1grow (&action_obstack, '{');

 
   count = 1;
 
   count = 1;

-  c = getc (finput);
-

   while (count > 0)
     {
   while (count > 0)
     {

-      while (c != '}')
-       {
-         switch (c)
-           {
-           case '\n':
-             obstack_1grow (&action_obstack, c);
-             lineno++;
-             break;
-
-           case '{':
-             obstack_1grow (&action_obstack, c);
-             count++;
-             break;
-
-           case '\'':
-           case '"':
-             copy_string (finput, &action_obstack, c);
-             break;
+      while ((c = getc (finput)) != '}')
+       switch (c)
+         {
+         case '\n':
+           obstack_1grow (&action_obstack, c);
+           lineno++;
+           break;

 
 

-           case '/':
-             copy_comment (finput, &action_obstack);
-             break;
+         case '{':
+           obstack_1grow (&action_obstack, c);
+           count++;
+           break;

 
 

-           case '$':
-             copy_dollar (finput, &action_obstack,
-                          rule, stack_offset);
-             break;
+         case '\'':
+         case '"':
+           copy_string (finput, &action_obstack, c);
+           break;

 
 

-           case '@':
-             copy_at (finput, &action_obstack,
-                      stack_offset);
-             break;
+         case '/':
+           copy_comment (finput, &action_obstack);
+           break;

 
 

-           case EOF:
-             fatal (_("unmatched %s"), "`{'");
+         case '$':
+           copy_dollar (finput, &action_obstack,
+                        rule, stack_offset);
+           break;

 
 

-           default:
-             obstack_1grow (&action_obstack, c);
-           }
+         case '@':
+           copy_at (finput, &action_obstack,
+                    stack_offset);
+           break;

 
 

-         c = getc (finput);
-       }
+         case EOF:
+           fatal (_("unmatched %s"), "`{'");

 
 

-      /* above loop exits when c is '}' */
+         default:
+           obstack_1grow (&action_obstack, c);
+         }

 
 

+      /* Above loop exits when C is '}'.  */

       if (--count)
        {
          obstack_1grow (&action_obstack, c);
       if (--count)
        {
          obstack_1grow (&action_obstack, c);


@@ -1139,122 +1160,31 @@ copy_action (symbol_list *rule, int stack_offset)
        }
     }
 
        }
     }
 

-  obstack_sgrow (&action_obstack, ";\n    break;}");
+  obstack_1grow (&action_obstack, '\0');

 }
 }

-\f
-/*-------------------------------------------------------------------.
-| After `%guard' is seen in the input file, copy the actual guard    |
-| into the guards file.  If the guard is followed by an action, copy |
-| that into the actions file.  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, for the simple parser in which    |
-| the stack is not popped until after the guard is run.              |
-`-------------------------------------------------------------------*/
+

 
 static void
 
 static void

-copy_guard (symbol_list *rule, int stack_offset)
+parse_action (symbol_list *rule, int stack_offset)

 {
 {

-  int c;
-  int count;
-  int brace_flag = 0;
-
-  /* offset is always 0 if parser has already popped the stack pointer */
-  if (semantic_parser)
-    stack_offset = 0;
-
-  obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
-  if (!no_lines_flag)
-    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);
-
-  while (brace_flag ? (count > 0) : (c != ';'))
-    {
-      switch (c)
-       {
-       case '\n':
-         obstack_1grow (&guard_obstack, c);
-         lineno++;
-         break;
-
-       case '{':
-         obstack_1grow (&guard_obstack, c);
-         brace_flag = 1;
-         count++;
-         break;
-
-       case '}':
-         obstack_1grow (&guard_obstack, c);
-         if (count > 0)
-           count--;
-         else
-           {
-             complain (_("unmatched %s"), "`}'");
-             c = getc (finput);        /* skip it */
-           }
-         break;
-
-       case '\'':
-       case '"':
-         copy_string (finput, &guard_obstack, c);
-         break;
-
-       case '/':
-         copy_comment (finput, &guard_obstack);
-         break;
-
-       case '$':
-         copy_dollar (finput, &guard_obstack, rule, stack_offset);
-         break;
-
-       case '@':
-         copy_at (finput, &guard_obstack, stack_offset);
-         break;
-
-       case EOF:
-         fatal ("%s", _("unterminated %guard clause"));
-
-       default:
-         obstack_1grow (&guard_obstack, c);
-       }
-
-      if (c != '}' || count != 0)
-       c = getc (finput);
-    }
-
-  c = skip_white_space ();
-
-  obstack_sgrow (&guard_obstack, ";\n    break;}");
-  if (c == '{')
-    copy_action (rule, stack_offset);
-  else if (c == '=')
-    {
-      c = getc (finput);       /* why not skip_white_space -wjh */
-      if (c == '{')
-       copy_action (rule, stack_offset);
-    }
-  else
-    ungetc (c, finput);
+  rule->action_line = lineno;
+  parse_braces (rule, stack_offset);
+  rule->action = obstack_finish (&action_obstack);

 }
 }

-\f
+

 
 static void
 
 static void

-record_rule_line (void)
+parse_guard (symbol_list *rule, int stack_offset)

 {
 {

-  /* 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;
+  token_t t = lex ();
+  if (t != tok_left_curly)
+    complain (_("invalid %s declaration"), "%guard");
+  rule->guard_line = lineno;
+  parse_braces (rule, stack_offset);
+  rule->guard = obstack_finish (&action_obstack);

 }
 
 }
 

+\f

 
 /*-------------------------------------------------------------------.
 | Generate a dummy symbol, a nonterminal, whose name cannot conflict |
 
 /*-------------------------------------------------------------------.
 | Generate a dummy symbol, a nonterminal, whose name cannot conflict |


@@ -1277,343 +1207,250 @@ gensym (void)
   sym->value = nvars++;
   return sym;
 }
   sym->value = nvars++;
   return sym;
 }

-
-#if 0
-/*------------------------------------------------------------------.
-| read in a %type declaration and record its information for        |
-| get_type_name to access.  This is unused.  It is only called from |
-| the #if 0 part of readgram                                        |
-`------------------------------------------------------------------*/
-
-static int
-get_type (void)
-{
-  int k;
-  token_t token;
-  char *name;
-
-  token = lex ();
-
-  if (token != tok_typename)
-    {
-      complain (_("invalid %s declaration"), "%type");
-      return t;
-    }
-
-  name = xstrdup (token_buffer);
-
-  for (;;)
-    {
-      token = lex ();
-
-      switch (token)
-       {
-       case tok_semicolon:
-         return lex ();
-
-       case tok_comma:
-         break;
-
-       case tok_identifier:
-         if (symval->type_name == NULL)
-           symval->type_name = name;
-         else if (strcmp (name, symval->type_name) != 0)
-           complain (_("type redeclaration for %s"), symval->tag);
-
-         break;
-
-       default:
-         return token;
-       }
-    }
-}
-
-#endif

 \f
 \f

-/*------------------------------------------------------------------.
-| Parse the input grammar into a one symbol_list structure.  Each   |
-| rule is represented by a sequence of symbols: the left hand side  |
-| followed by the contents of the right hand side, followed by a    |
-| null pointer instead of a symbol to terminate the rule.  The next |
-| symbol is the lhs of the following rule.                          |
-|                                                                   |
-| All guards and actions are copied out to the appropriate files,   |
-| labelled by the rule number they apply to.                        |
-`------------------------------------------------------------------*/
+/*-------------------------------------------------------------------.
+| Parse the input grammar into a one symbol_list structure.  Each    |
+| rule is represented by a sequence of symbols: the left hand side   |
+| followed by the contents of the right hand side, followed by a     |
+| null pointer instead of a symbol to terminate the rule.  The next  |
+| symbol is the lhs of the following rule.                           |
+|                                                                    |
+| All guards and actions are copied out to the appropriate files,    |
+| labelled by the rule number they apply to.                         |
+|                                                                    |
+| Bison used to allow some %directives in the rules sections, but    |
+| this is no longer consider appropriate: (i) the documented grammar |
+| doesn't claim it, (ii), it would promote bad style, (iii), error   |
+| recovery for %directives consists in skipping the junk until a `%' |
+| is seen and helrp synchronizing.  This scheme is definitely wrong  |
+| in the rules section.                                              |
+`-------------------------------------------------------------------*/

 
 static void
 readgram (void)
 {
   token_t t;
   bucket *lhs = NULL;
 
 static void
 readgram (void)
 {
   token_t t;
   bucket *lhs = NULL;

-  symbol_list *p;
-  symbol_list *p1;
+  symbol_list *p = NULL;
+  symbol_list *p1 = NULL;

   bucket *bp;
 
   /* Points to first symbol_list of current rule. its symbol is the
      lhs of the rule.  */
   bucket *bp;
 
   /* Points to first symbol_list of current rule. its symbol is the
      lhs of the rule.  */

-  symbol_list *crule;
+  symbol_list *crule = NULL;

   /* Points to the symbol_list preceding crule.  */
   /* Points to the symbol_list preceding crule.  */

-  symbol_list *crule1;
-
-  p1 = NULL;
+  symbol_list *crule1 = NULL;

 
   t = lex ();
 
   while (t != tok_two_percents && t != tok_eof)
 
   t = lex ();
 
   while (t != tok_two_percents && t != tok_eof)

-    {
-      if (t == tok_identifier || t == tok_bar)
-       {
-         int action_flag = 0;
-         /* Number of symbols in rhs of this rule so far */
-         int rulelength = 0;
-         int xactions = 0;     /* JF for error checking */
-         bucket *first_rhs = 0;
-
-         if (t == tok_identifier)
-           {
-             lhs = symval;
-
-             if (!start_flag)
-               {
-                 startval = lhs;
-                 start_flag = 1;
-               }
-
-             t = lex ();
-             if (t != tok_colon)
-               {
-                 complain (_("ill-formed rule: initial symbol not followed by colon"));
-                 unlex (t);
-               }
-           }
-
-         if (nrules == 0 && t == tok_bar)
-           {
-             complain (_("grammar starts with vertical bar"));
-             lhs = symval;     /* BOGUS: use a random symval */
-           }
-         /* start a new rule and record its lhs.  */
-
-         nrules++;
-         nitems++;
-
-         record_rule_line ();
-
-         p = XCALLOC (symbol_list, 1);
-         p->sym = lhs;
-
-         crule1 = p1;
-         if (p1)
-           p1->next = p;
-         else
-           grammar = p;
-
-         p1 = p;
-         crule = p;
-
-         /* mark the rule's lhs as a nonterminal if not already so.  */
+    if (t == tok_identifier || t == tok_bar)
+      {
+       int action_flag = 0;
+       /* Number of symbols in rhs of this rule so far */
+       int rulelength = 0;
+       int xactions = 0;       /* JF for error checking */
+       bucket *first_rhs = 0;
+
+       if (t == tok_identifier)
+         {
+           lhs = symval;
+
+           if (!start_flag)
+             {
+               startval = lhs;
+               start_flag = 1;
+             }

 
 

-         if (lhs->class == unknown_sym)
-           {
-             lhs->class = nterm_sym;
-             lhs->value = nvars;
-             nvars++;
-           }
-         else if (lhs->class == token_sym)
-           complain (_("rule given for %s, which is a token"), lhs->tag);
+           t = lex ();
+           if (t != tok_colon)
+             {
+               complain (_("ill-formed rule: initial symbol not followed by colon"));
+               unlex (t);
+             }
+         }
+
+       if (nrules == 0 && t == tok_bar)
+         {
+           complain (_("grammar starts with vertical bar"));
+           lhs = symval;       /* BOGUS: use a random symval */
+         }
+       /* start a new rule and record its lhs.  */
+
+       nrules++;
+       nitems++;
+
+       p = symbol_list_new (lhs);
+
+       crule1 = p1;
+       if (p1)
+         p1->next = p;
+       else
+         grammar = p;

 
 

-         /* read the rhs of the rule.  */
+       p1 = p;
+       crule = p;

 
 

-         for (;;)
-           {
-             t = lex ();
-             if (t == tok_prec)
-               {
-                 t = lex ();
-                 crule->ruleprec = symval;
-                 t = lex ();
-               }
+       /* mark the rule's lhs as a nonterminal if not already so.  */

 
 

-             if (!(t == tok_identifier || t == tok_left_curly))
-               break;
+       if (lhs->class == unknown_sym)
+         {
+           lhs->class = nterm_sym;
+           lhs->value = nvars;
+           nvars++;
+         }
+       else if (lhs->class == token_sym)
+         complain (_("rule given for %s, which is a token"), lhs->tag);

 
 

-             /* If next token is an identifier, see if a colon follows it.
-                If one does, exit this rule now.  */
-             if (t == tok_identifier)
-               {
-                 bucket *ssave;
-                 token_t t1;
-
-                 ssave = symval;
-                 t1 = lex ();
-                 unlex (t1);
-                 symval = ssave;
-                 if (t1 == tok_colon)
-                   break;
-
-                 if (!first_rhs)       /* JF */
-                   first_rhs = symval;
-                 /* Not followed by colon =>
-                    process as part of this rule's rhs.  */
-               }
+       /* read the rhs of the rule.  */

 
 

-             /* If we just passed an action, that action was in the middle
-                of a rule, so make a dummy rule to reduce it to a
-                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.  */
-                 sdummy = gensym ();
-
-                 /* Make a new rule, whose body is empty,
-                    before the current one, so that the action
-                    just read can belong to it.  */
-                 nrules++;
-                 nitems++;
-                 record_rule_line ();
-                 p = XCALLOC (symbol_list, 1);
-                 if (crule1)
-                   crule1->next = p;
-                 else
-                   grammar = p;
-                 p->sym = sdummy;
-                 crule1 = XCALLOC (symbol_list, 1);
-                 p->next = crule1;
-                 crule1->next = crule;
-
-                 /* Insert the dummy generated by that rule into this
-                    rule.  */
-                 nitems++;
-                 p = XCALLOC (symbol_list, 1);
-                 p->sym = sdummy;
-                 p1->next = p;
-                 p1 = p;
-
-                 action_flag = 0;
-               }
-
-             if (t == tok_identifier)
-               {
-                 nitems++;
-                 p = XCALLOC (symbol_list, 1);
-                 p->sym = symval;
-                 p1->next = p;
-                 p1 = p;
-               }
-             else              /* handle an action.  */
-               {
-                 copy_action (crule, rulelength);
-                 action_flag = 1;
-                 xactions++;   /* JF */
-               }
-             rulelength++;
-           }                   /* end of  read rhs of rule */
+       for (;;)
+         {
+           t = lex ();
+           if (t == tok_prec)
+             {
+               t = lex ();
+               crule->ruleprec = symval;
+               t = lex ();
+             }
+
+           if (!(t == tok_identifier || t == tok_left_curly))
+             break;

 
 

-         /* Put an empty link in the list to mark the end of this rule  */
-         p = XCALLOC (symbol_list, 1);
-         p1->next = p;
-         p1 = p;
+           /* If next token is an identifier, see if a colon follows it.
+              If one does, exit this rule now.  */
+           if (t == tok_identifier)
+             {
+               bucket *ssave;
+               token_t t1;
+
+               ssave = symval;
+               t1 = lex ();
+               unlex (t1);
+               symval = ssave;
+               if (t1 == tok_colon)
+                 break;
+
+               if (!first_rhs) /* JF */
+                 first_rhs = symval;
+               /* Not followed by colon =>
+                  process as part of this rule's rhs.  */
+             }
+
+           /* If we just passed an action, that action was in the middle
+              of a rule, so make a dummy rule to reduce it to a
+              non-terminal.  */
+           if (action_flag)
+             {
+               /* 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.  */
+               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.  */
+               nrules++;
+               nitems++;
+               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;
+               /* End of the rule. */
+               crule1 = symbol_list_new (NULL);
+               crule1->next = crule;
+
+               p->next = crule1;
+
+               /* Insert the dummy generated by that rule into this
+                  rule.  */
+               nitems++;
+               p = symbol_list_new (sdummy);
+               p1->next = p;
+               p1 = p;
+
+               action_flag = 0;
+             }
+
+           if (t == tok_identifier)
+             {
+               nitems++;
+               p = symbol_list_new (symval);
+               p1->next = p;
+               p1 = p;
+             }
+           else                /* handle an action.  */
+             {
+               parse_action (crule, rulelength);
+               action_flag = 1;
+               xactions++;     /* JF */
+             }
+           rulelength++;
+         }                     /* end of  read rhs of rule */
+
+       /* Put an empty link in the list to mark the end of this rule  */
+       p = symbol_list_new (NULL);
+       p1->next = p;
+       p1 = p;
+
+       if (t == tok_prec)
+         {
+           complain (_("two @prec's in a row"));
+           t = lex ();
+           crule->ruleprec = symval;
+           t = lex ();
+         }

 
 

-         if (t == tok_prec)
-           {
-             complain (_("two @prec's in a row"));
-             t = lex ();
-             crule->ruleprec = symval;
-             t = lex ();
-           }
-         if (t == tok_guard)
-           {
-             if (!semantic_parser)
-               complain (_("%%guard present but %%semantic_parser not specified"));
+       if (t == tok_guard)
+         {
+           if (!semantic_parser)
+             complain (_("%%guard present but %%semantic_parser not specified"));

 
 

-             copy_guard (crule, rulelength);
-             t = lex ();
-           }
-         else if (t == tok_left_curly)
-           {
-             /* This case never occurs -wjh */
-             if (action_flag)
-               complain (_("two actions at end of one rule"));
-             copy_action (crule, rulelength);
-             action_flag = 1;
-             xactions++;       /* -wjh */
-             t = lex ();
-           }
-         /* If $$ is being set in default way, report if any type
-            mismatch.  */
-         else if (!xactions
-                  && first_rhs && lhs->type_name != first_rhs->type_name)
-           {
-             if (lhs->type_name == 0
-                 || first_rhs->type_name == 0
-                 || strcmp (lhs->type_name, first_rhs->type_name))
-               complain (_("type clash (`%s' `%s') on default action"),
-                         lhs->type_name ? lhs->type_name : "",
-                         first_rhs->type_name ? first_rhs->type_name : "");
-           }
-         /* Warn if there is no default for $$ but we need one.  */
-         else if (!xactions && !first_rhs && lhs->type_name != 0)
-           complain (_("empty rule for typed nonterminal, and no action"));
-         if (t == tok_semicolon)
+           parse_guard (crule, rulelength);

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

-       }
-#if 0
-      /* these things can appear as alternatives to rules.  */
-/* NO, they cannot.
-       a) none of the documentation allows them
-       b) most of them scan forward until finding a next %
-               thus they may swallow lots of intervening rules
-*/
-      else if (t == tok_token)
-       {
-         parse_token_decl (token_sym, nterm_sym);
-         t = lex ();
-       }
-      else if (t == tok_nterm)
-       {
-         parse_token_decl (nterm_sym, token_sym);
-         t = lex ();
-       }
-      else if (t == tok_type)
-       {
-         t = get_type ();
-       }
-      else if (t == tok_union)
-       {
-         parse_union_decl ();
-         t = lex ();
-       }
-      else if (t == tok_expect)
-       {
-         parse_expect_decl ();
-         t = lex ();
-       }
-      else if (t == tok_start)
-       {
-         parse_start_decl ();
-         t = lex ();
-       }
-#endif
-
-      else
-       {
-         complain (_("invalid input: %s"), quote (token_buffer));
+         }
+
+       if (t == tok_left_curly)
+         {
+           /* This case never occurs -wjh */
+           if (action_flag)
+             complain (_("two actions at end of one rule"));
+           parse_action (crule, rulelength);
+           action_flag = 1;
+           xactions++; /* -wjh */
+           t = lex ();
+         }
+       /* If $$ is being set in default way, report if any type
+          mismatch.  */
+       else if (!xactions
+                && first_rhs && lhs->type_name != first_rhs->type_name)
+         {
+           if (lhs->type_name == 0
+               || first_rhs->type_name == 0
+               || strcmp (lhs->type_name, first_rhs->type_name))
+             complain (_("type clash (`%s' `%s') on default action"),
+                       lhs->type_name ? lhs->type_name : "",
+                       first_rhs->type_name ? first_rhs->type_name : "");
+         }
+       /* Warn if there is no default for $$ but we need one.  */
+       else if (!xactions && !first_rhs && lhs->type_name != 0)
+         complain (_("empty rule for typed nonterminal, and no action"));
+       if (t == tok_semicolon)

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

-       }
-    }
+      }
+    else
+      {
+       complain (_("invalid input: %s"), quote (token_buffer));
+       t = lex ();
+      }

 
   /* grammar has been read.  Do some checking */
 
 
   /* grammar has been read.  Do some checking */
 

-  if (nsyms > MAXSHORT)
-    fatal (_("too many symbols (tokens plus nonterminals); maximum %d"),
-          MAXSHORT);

   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 
   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 


@@ -1629,6 +1466,25 @@ readgram (void)
        bp->value = nvars++;
       }
 
        bp->value = nvars++;
       }
 

+  /* Insert the initial rule, which line is that of the first rule
+     (not that of the start symbol):
+
+     axiom: %start EOF.  */
+  p = symbol_list_new (axiom);
+  p->line = grammar->line;
+  p->next = symbol_list_new (startval);
+  p->next->next = symbol_list_new (eoftoken);
+  p->next->next->next = symbol_list_new (NULL);
+  p->next->next->next->next = grammar;
+  nrules += 1;
+  nitems += 3;
+  grammar = p;
+  startval = axiom;
+
+  if (nsyms > MAXSHORT)
+    fatal (_("too many symbols (tokens plus nonterminals); maximum %d"),
+          MAXSHORT);
+

   ntokens = nsyms - nvars;
 }
 
   ntokens = nsyms - nvars;
 }
 


@@ -1643,6 +1499,13 @@ read_additionnal_code (void)
 
   obstack_init (&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);
 
   while ((c = getc (finput)) != EOF)
     obstack_1grow (&el_obstack, c);
 


@@ -1651,55 +1514,6 @@ read_additionnal_code (void)
 }
 
 \f
 }
 
 \f

-/*--------------------------------------------------------------.
-| For named tokens, but not literal ones, define the name.  The |
-| value is the user token number.                               |
-`--------------------------------------------------------------*/
-
-static void
-output_token_defines (struct obstack *oout)
-{
-  bucket *bp;
-  char *cp, *symbol;
-  char c;
-
-  for (bp = firstsymbol; bp; bp = bp->next)
-    {
-      symbol = bp->tag;                /* get symbol */
-
-      if (bp->value >= ntokens)
-       continue;
-      if (bp->user_token_number == SALIAS)
-       continue;
-      if ('\'' == *symbol)
-       continue;               /* skip literal character */
-      if (bp == errtoken)
-       continue;               /* skip error token */
-      if ('\"' == *symbol)
-       {
-         /* use literal string only if given a symbol with an alias */
-         if (bp->alias)
-           symbol = bp->alias->tag;
-         else
-           continue;
-       }
-
-      /* Don't #define nonliteral tokens whose names contain periods.  */
-      cp = symbol;
-      while ((c = *cp++) && c != '.');
-      if (c != '\0')
-       continue;
-
-      obstack_fgrow2 (oout, "# define\t%s\t%d\n",
-                     symbol, bp->user_token_number);
-      if (semantic_parser)
-       /* 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.                                                           |
 /*------------------------------------------------------------------.
 | Set TOKEN_TRANSLATIONS.  Check that no two symbols share the same |
 | number.                                                           |


@@ -1733,18 +1547,17 @@ token_translations_init (void)
       /* 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"),
       /* 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]],
+                 symbols[token_translations[bp->user_token_number]]->tag,

                  bp->tag, bp->user_token_number);
       token_translations[bp->user_token_number] = bp->value;
     }
 }
 
 
                  bp->tag, bp->user_token_number);
       token_translations[bp->user_token_number] = bp->value;
     }
 }
 
 

-/*------------------------------------------------------------------.
-| Assign symbol numbers, and write definition of token names into   |
-| FDEFINES.  Set up vectors TAGS and SPREC of names and precedences |
-| of symbols.                                                       |
-`------------------------------------------------------------------*/
+/*----------------------------------------------------------------.
+| Assign symbol numbers, and write definition of token names into |
+| FDEFINES.  Set up vectors SYMBOL_TABLE, TAGS of symbols.        |
+`----------------------------------------------------------------*/

 
 static void
 packsymbols (void)
 
 static void
 packsymbols (void)


@@ -1752,17 +1565,8 @@ packsymbols (void)
   bucket *bp = NULL;
   int tokno = 1;
   int last_user_token_number;
   bucket *bp = NULL;
   int tokno = 1;
   int last_user_token_number;

-  static char DOLLAR[] = "$";
-
-  tags = XCALLOC (char *, nsyms + 1);
-  user_toknums = XCALLOC (short, nsyms + 1);

 
 

-  sprec = XCALLOC (short, nsyms);
-  sassoc = XCALLOC (short, nsyms);
-
-  /* The EOF token. */
-  tags[0] = DOLLAR;
-  user_toknums[0] = 0;
+  symbols = XCALLOC (bucket *, nsyms);

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


@@ -1775,11 +1579,18 @@ packsymbols (void)
        }
       else if (bp->alias)
        {
        }
       else if (bp->alias)
        {

-         /* this symbol and its alias are a single token defn.
-            allocate a tokno, and assign to both check agreement of
-            ->prec and ->assoc fields and make both the same */
-         if (bp->value == 0)
-           bp->value = bp->alias->value = tokno++;
+         /* This symbol and its alias are a single token defn.
+            Allocate a tokno, and assign to both check agreement of
+            prec and assoc fields and make both the same */
+         if (bp->value == -1)
+           {
+             if (bp == eoftoken || bp->alias == eoftoken)
+               bp->value = bp->alias->value = 0;
+             else
+               {
+                 bp->value = bp->alias->value = tokno++;
+               }
+           }

 
          if (bp->prec != bp->alias->prec)
            {
 
          if (bp->prec != bp->alias->prec)
            {


@@ -1805,13 +1616,17 @@ packsymbols (void)
                bp->assoc = bp->alias->assoc;
            }
 
                bp->assoc = bp->alias->assoc;
            }
 

+         /* Do not do processing below for SALIASs.  */

          if (bp->user_token_number == SALIAS)
          if (bp->user_token_number == SALIAS)

-           continue;           /* do not do processing below for SALIASs */
+           continue;

 
        }
 
        }

-      else                     /* bp->class == token_sym */
+      else /* bp->class == token_sym */

        {
        {

-         bp->value = tokno++;
+         if (bp == eoftoken)
+           bp->value = 0;
+         else
+           bp->value = tokno++;

        }
 
       if (bp->class == token_sym)
        }
 
       if (bp->class == token_sym)


@@ -1822,10 +1637,7 @@ packsymbols (void)
            max_user_token_number = bp->user_token_number;
        }
 
            max_user_token_number = bp->user_token_number;
        }
 

-      tags[bp->value] = bp->tag;
-      user_toknums[bp->value] = bp->user_token_number;
-      sprec[bp->value] = bp->prec;
-      sassoc[bp->value] = bp->assoc;
+      symbols[bp->value] = bp;

     }
 
   token_translations_init ();
     }
 
   token_translations_init ();


@@ -1841,60 +1653,53 @@ packsymbols (void)
 }
 
 
 }
 
 

-/*-----------------------------------.
-| Output definition of token names.  |
-`-----------------------------------*/
+/*---------------------------------------------------------------.
+| Save the definition of token names in the `TOKENDEFS' muscle.  |
+`---------------------------------------------------------------*/

 
 static void
 
 static void

-symbols_output (void)
+symbols_save (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 0
-  if (!no_parser_flag)
-    output_token_defines (&table_obstack);
-#endif
-
-  if (defines_flag)
+  struct obstack tokendefs;
+  bucket *bp;
+  obstack_init (&tokendefs);
+
+  for (bp = firstsymbol; bp; bp = bp->next)

     {
     {

-      output_token_defines (&defines_obstack);
+      char *symbol = bp->tag;                /* get symbol */

 
 

-      if (!pure_parser)
+      if (bp->value >= ntokens)
+       continue;
+      if (bp->user_token_number == SALIAS)
+       continue;
+      if ('\'' == *symbol)
+       continue;               /* skip literal character */
+      if (bp == errtoken)
+       continue;               /* skip error token */
+      if ('\"' == *symbol)

        {
        {

-         if (spec_name_prefix)
-           obstack_fgrow1 (&defines_obstack, "\nextern YYSTYPE %slval;\n",
-                           spec_name_prefix);
+         /* use literal string only if given a symbol with an alias */
+         if (bp->alias)
+           symbol = bp->alias->tag;

          else
          else

-           obstack_sgrow (&defines_obstack,
-                                "\nextern YYSTYPE yylval;\n");
+           continue;

        }
 
        }
 

-      if (semantic_parser)
-       {
-         int i;
+      /* Don't #define nonliteral tokens whose names contain periods.  */
+      if (strchr (symbol, '.'))
+       continue;

 
 

-         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
-         /* `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
-       }
+      obstack_fgrow2 (&tokendefs, "# define %s\t%d\n",
+                     symbol, bp->user_token_number);
+      if (semantic_parser)
+       /* FIXME: This is probably wrong, and should be just as
+          above. --akim.  */
+       obstack_fgrow2 (&tokendefs, "# define T%s\t%d\n", symbol, bp->value);

     }
     }

+
+  obstack_1grow (&tokendefs, 0);
+  muscle_insert ("tokendef", xstrdup (obstack_finish (&tokendefs)));
+  obstack_free (&tokendefs, NULL);

 }
 
 
 }
 
 


@@ -1910,14 +1715,12 @@ packgram (void)
   int ruleno;
   symbol_list *p;
 
   int ruleno;
   symbol_list *p;
 

-  bucket *ruleprec;
+  /* We use short to index items.  */
+  if (nitems >= MAXSHORT)
+    fatal (_("too many items (max %d)"), MAXSHORT);

 
   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;
+  rules = XCALLOC (rule_t, nrules) - 1;

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


@@ -1925,9 +1728,15 @@ 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;
+      rules[ruleno].lhs = p->sym->value;
+      rules[ruleno].rhs = itemno;
+      rules[ruleno].line = p->line;
+      rules[ruleno].useful = TRUE;
+      rules[ruleno].action = p->action;
+      rules[ruleno].action_line = p->action_line;
+      rules[ruleno].guard = p->guard;
+      rules[ruleno].guard_line = p->guard_line;

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


@@ -1937,8 +1746,8 @@ 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;
+             rules[ruleno].prec = p->sym->prec;
+             rules[ruleno].assoc = p->sym->assoc;

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


@@ -1948,9 +1757,9 @@ 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;
+         rules[ruleno].prec = ruleprec->prec;
+         rules[ruleno].assoc = ruleprec->assoc;
+         rules[ruleno].precsym = ruleprec->value;

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


@@ -1961,6 +1770,11 @@ packgram (void)
     }
 
   ritem[itemno] = 0;
     }
 
   ritem[itemno] = 0;

+  nritems = itemno;
+  assert (nritems == nitems);
+
+  if (trace_flag)
+    ritem_print (stderr);

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


@@ -1977,12 +1791,10 @@ reader (void)
   start_flag = 0;
   startval = NULL;             /* start symbol not specified yet. */
 
   start_flag = 0;
   startval = NULL;             /* start symbol not specified yet. */
 

-  nsyms = 1;
+  nsyms = 0;

   nvars = 0;
   nrules = 0;
   nitems = 0;
   nvars = 0;
   nrules = 0;
   nitems = 0;

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

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


@@ -2001,6 +1813,11 @@ reader (void)
   /* Initialize the symbol table.  */
   tabinit ();
 
   /* Initialize the symbol table.  */
   tabinit ();
 

+  /* Construct the axiom symbol. */
+  axiom = getsym ("$axiom");
+  axiom->class = nterm_sym;
+  axiom->value = nvars++;
+

   /* Construct the error token */
   errtoken = getsym ("error");
   errtoken->class = token_sym;
   /* Construct the error token */
   errtoken = getsym ("error");
   errtoken->class = token_sym;


@@ -2012,24 +1829,42 @@ reader (void)
   undeftoken->class = token_sym;
   undeftoken->user_token_number = 2;
 
   undeftoken->class = token_sym;
   undeftoken->user_token_number = 2;
 

+  /* Initialize the obstacks. */
+  obstack_init (&action_obstack);
+  obstack_init (&attrs_obstack);
+  obstack_init (&output_obstack);
+
+  finput = xfopen (infile, "r");
+

   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */
   read_declarations ();
   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */
   read_declarations ();

+
+  /* If the user did not define her EOFTOKEN, do it now. */
+  if (!eoftoken)
+    {
+      eoftoken = getsym ("$");
+      eoftoken->class = token_sym;
+      /* Value specified by POSIX.  */
+      eoftoken->user_token_number = 0;
+    }
+

   /* 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 ();
 
   /* 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,
-     write its type into the .tab.h file.
-     This is no longer need with header skeleton.  */
+  lex_free ();
+  xfclose (finput);

 
   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();
 
   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();

-  symbols_output ();
+  /* Save them. */
+  symbols_save ();
+

   /* Convert the grammar into the format described in gram.h.  */
   packgram ();
 }
   /* Convert the grammar into the format described in gram.h.  */
   packgram ();
 }