* 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 49e5158e1e030ae34aa82dcef0676eb88151f040..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.


@@ -26,23 +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"

-#include "macrotab.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;


@@ -66,6 +64,19 @@ static int lastprec;
 
 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
 
 /*===================\


@@ -123,7 +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;


@@ -426,11 +437,12 @@ 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)
   if (!no_lines_flag)

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

 
   after_percent = 0;
 
 
   after_percent = 0;
 


@@ -487,8 +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)
 {

-  token_t 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;


@@ -537,7 +549,6 @@ 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;
        }
       else if (token == tok_identifier)
          symbol = NULL;
        }
       else if (token == tok_identifier)


@@ -562,12 +573,12 @@ 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;

-         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 ('%');
        }
     }


@@ -704,7 +715,6 @@ parse_assoc_decl (associativity assoc)
          if (prev == tok_identifier)
            {
              symval->user_token_number = numval;
          if (prev == tok_identifier)
            {
              symval->user_token_number = numval;

-             translations = 1;

            }
          else
            {
            }
          else
            {


@@ -724,16 +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


@@ -741,30 +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, 
-                                           macro_find("filename")));
-  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_sgrow (&attrs_obstack, "typedef union");
+  obstack_init (&union_obstack);
+  obstack_sgrow (&union_obstack, "union");

   if (defines_flag)
   if (defines_flag)

-    obstack_sgrow (&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)
        {


@@ -773,7 +795,7 @@ parse_union_decl (void)
          break;
 
        case '/':
          break;
 
        case '/':

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

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


@@ -786,19 +808,21 @@ parse_union_decl (void)
          count--;
          if (count <= 0)
            {
          count--;
          if (count <= 0)
            {

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

              if (defines_flag)
              if (defines_flag)

-               obstack_sgrow (&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);
     }

+

 }
 
 
 }
 
 


@@ -846,9 +870,8 @@ parse_thong_decl (void)
   token_t token;
   struct bucket *symbol;
   char *typename = 0;
   token_t token;
   struct bucket *symbol;
   char *typename = 0;

-  int usrtoknum;
+  int usrtoknum = SUNDEF;

 
 

-  translations = 1;

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


@@ -878,8 +901,6 @@ parse_thong_decl (void)
       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 */
 


@@ -900,14 +921,12 @@ parse_thong_decl (void)
   nsyms--;
 }
 
   nsyms--;
 }
 

-/* FIXME. */
-

 static void
 static void

-parse_macro_decl (void)
+parse_muscle_decl (void)

 {
   int ch = ungetc (skip_white_space (), finput);
 {
   int ch = ungetc (skip_white_space (), finput);

-  char* macro_key;
-  char* macro_value;
+  char* muscle_key;
+  char* muscle_value;

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


@@ -916,10 +935,10 @@ parse_macro_decl (void)
       skip_to_char ('%');
       return;
     }
       skip_to_char ('%');
       return;
     }

-  copy_identifier (finput, &macro_obstack);
-  obstack_1grow (&macro_obstack, 0);
-  macro_key = obstack_finish (&macro_obstack);
-  
+  copy_identifier (finput, &muscle_obstack);
+  obstack_1grow (&muscle_obstack, 0);
+  muscle_key = obstack_finish (&muscle_obstack);
+

   /* Read value. */
   ch = skip_white_space ();
   if (ch != '"')
   /* Read value. */
   ch = skip_white_space ();
   if (ch != '"')


@@ -934,53 +953,69 @@ parse_macro_decl (void)
       else
        fatal (_("Premature EOF after %s"), "\"");
     }
       else
        fatal (_("Premature EOF after %s"), "\"");
     }

-  copy_string2 (finput, &macro_obstack, '"', 0);
-  obstack_1grow (&macro_obstack, 0);
-  macro_value = obstack_finish (&macro_obstack);
+  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. */
 
   /* Store the (key, value) pair in the environment. */

-  macro_insert (macro_key, macro_value);
+  muscle_insert (muscle_key, muscle_value);

 }
 
 
 }
 
 

-/*----------------------------------.
-| Parse what comes after %skeleton. |
-`----------------------------------*/

 
 

-void
-parse_skel_decl (void)
+/*---------------------------------.
+| Parse a double quoted parameter. |
+`---------------------------------*/
+
+static const char *
+parse_dquoted_param (const char *from)

 {
 {

-  /* Complete with parse_dquoted_param () on the CVS branch 1.29.  */
-}
+  struct obstack param_obstack;
+  const char *param = NULL;
+  int c;

 
 

-/*------------------------------------------.
-| Parse what comes after %header_extension. |
-`------------------------------------------*/
+  obstack_init (&param_obstack);
+  c = skip_white_space ();

 
 

-static void
-parse_header_extension_decl (void)
-{
-  char buff[32];
+  if (c != '"')
+    {
+      complain (_("invalid %s declaration"), from);
+      ungetc (c, finput);
+      skip_to_char ('%');
+      return NULL;
+    }

 
 

-  if (header_extension)
-    complain (_("multiple %%header_extension declarations"));
-  fscanf (finput, "%s", buff);
-  header_extension = xstrdup (buff);
+  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 %source_extension. |
-`------------------------------------------*/
+/*----------------------------------.
+| Parse what comes after %skeleton. |
+`----------------------------------*/

 
 static void
 
 static void

-parse_source_extension_decl (void)
+parse_skel_decl (void)

 {
 {

-  char buff[32];
-
-  if (src_extension)
-    complain (_("multiple %%source_extension declarations"));
-  fscanf (finput, "%s", buff);
-  src_extension = xstrdup (buff);
+  skeleton = parse_dquoted_param ("%skeleton");

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


@@ -992,16 +1027,13 @@ parse_source_extension_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)
            {


@@ -1052,18 +1084,10 @@ read_declarations (void)
              parse_assoc_decl (non_assoc);
              break;
 
              parse_assoc_decl (non_assoc);
              break;
 

-           case tok_hdrext:
-             parse_header_extension_decl ();
-             break;
-
-           case tok_srcext:
-             parse_source_extension_decl ();
-             break;
-

            case tok_define:
            case tok_define:

-             parse_macro_decl ();
+             parse_muscle_decl ();

              break;
              break;

-             
+

            case tok_skel:
              parse_skel_decl ();
              break;
            case tok_skel:
              parse_skel_decl ();
              break;


@@ -1071,6 +1095,13 @@ read_declarations (void)
            case tok_noop:
              break;
 
            case tok_noop:
              break;
 

+           case tok_stropt:
+           case tok_intopt:
+           case tok_obsolete:
+             abort ();
+             break;
+
+           case tok_illegal:

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


@@ -1100,21 +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, 
-                                      macro_find ("filename")));
-      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, '{');
 


@@ -1200,9 +1228,9 @@ copy_guard (symbol_list *rule, int stack_offset)
 
   obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
   if (!no_lines_flag)
 
   obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
   if (!no_lines_flag)

-    obstack_fgrow2 (&guard_obstack, "#line %d %s\n",
+    obstack_fgrow2 (&guard_obstack, muscle_find ("linef"),

                    lineno, quotearg_style (c_quoting_style,
                    lineno, quotearg_style (c_quoting_style,

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

   obstack_1grow (&guard_obstack, '{');
 
   count = 0;
   obstack_1grow (&guard_obstack, '{');
 
   count = 0;


@@ -1278,20 +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.                                             |


@@ -1434,10 +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)


@@ -1499,36 +1510,35 @@ 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;
 
                  p1->next = p;
                  p1 = p;
 


@@ -1538,8 +1548,7 @@ readgram (void)
              if (t == tok_identifier)
                {
                  nitems++;
              if (t == tok_identifier)
                {
                  nitems++;

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

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


@@ -1553,7 +1562,7 @@ 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;
 


@@ -1676,14 +1685,21 @@ read_additionnal_code (void)
 {
   char c;
   struct obstack el_obstack;
 {
   char c;
   struct obstack el_obstack;

-  
+

   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);

-  
+

   obstack_1grow (&el_obstack, 0);
   obstack_1grow (&el_obstack, 0);

-  macro_insert ("epilogue", obstack_finish (&el_obstack));
+  muscle_insert ("epilogue", obstack_finish (&el_obstack));

 }
 
 \f
 }
 
 \f


@@ -1727,14 +1743,55 @@ output_token_defines (struct obstack *oout)
        continue;
 
       obstack_fgrow2 (oout, "# define\t%s\t%d\n",
        continue;
 
       obstack_fgrow2 (oout, "# define\t%s\t%d\n",

-                     symbol,
-                     (translations ? bp->user_token_number : bp->value));
+                     symbol, bp->user_token_number);

       if (semantic_parser)
       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);
     }
 }
 
 
        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);
+
+  /* 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;
+    }
+}
+
+

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


@@ -1744,20 +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[] = "$";
 
   tags = XCALLOC (char *, nsyms + 1);
   int last_user_token_number;
   static char DOLLAR[] = "$";
 
   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;
 


@@ -1810,7 +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;


@@ -1820,81 +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;
 

-  output_token_defines (&output_obstack);
-  obstack_1grow (&output_obstack, 0);
-  macro_insert ("tokendef", obstack_finish (&output_obstack));
-
-#if 0
-  if (!no_parser_flag)
-    output_token_defines (&table_obstack);
-#endif
-

   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_sgrow (&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

+       }

     }
 }
 
     }
 }
 


@@ -1911,14 +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;


@@ -1926,9 +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)


@@ -1938,8 +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;


@@ -1949,9 +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;


@@ -1962,6 +1997,9 @@ packgram (void)
     }
 
   ritem[itemno] = 0;
     }
 
   ritem[itemno] = 0;

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

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


@@ -1978,21 +2016,10 @@ 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;


@@ -2002,11 +2029,11 @@ reader (void)
 
   grammar = NULL;
 
 
   grammar = NULL;
 

-  init_lex ();
+  lex_init ();

   lineno = 1;
 
   lineno = 1;
 

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

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


@@ -2031,18 +2058,16 @@ reader (void)
   readgram ();
   /* Some C code is given at the end of the grammar file. */
   read_additionnal_code ();
   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 0
-  if (defines_flag)
-    reader_output_yylsp (&defines_obstack);
-#endif
+     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 ();
+  /* Output the headers. */
+  symbols_output ();

 }
 }