X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/bbb5bcc6f85b9ae3f951ab062455767318b827ad..709ae8c6ee619a2bf89a26ddd7575bdeb5d1896f:/src/reader.c

diff --git a/src/reader.c b/src/reader.c
index 7e23c0ef..f1577b48 100644
--- a/src/reader.c
+++ b/src/reader.c
@@ -1,5 +1,5 @@
 /* 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.
@@ -21,27 +21,28 @@
 
 
 #include "system.h"
-#include "obstack.h"
 #include "quotearg.h"
 #include "quote.h"
 #include "getargs.h"
 #include "files.h"
-#include "xalloc.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"
-
-/* 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;
+  int line;
+  /* The action is attached to the LHS of a rule. */
+  const char *action;
+  int action_line;
   bucket *ruleprec;
 }
 symbol_list;
@@ -65,6 +66,19 @@ static int lastprec;
 
 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;
+}
+
 
 
 /*===================\
@@ -122,7 +136,7 @@ read_signed_integer (FILE *stream)
 `--------------------------------------------------------------*/
 
 static char *
-get_type_name (int n, symbol_list * rule)
+get_type_name (int n, symbol_list *rule)
 {
   int i;
   symbol_list *rp;
@@ -156,11 +170,12 @@ get_type_name (int n, symbol_list * rule)
 `------------------------------------------------------------*/
 
 static inline void
-copy_string (FILE *fin, struct obstack *oout, int match)
+copy_string2 (FILE *fin, struct obstack *oout, int match, int store)
 {
   int c;
 
-  obstack_1grow (oout, match);
+  if (store)
+    obstack_1grow (oout, match);
 
   c = getc (fin);
 
@@ -192,29 +207,47 @@ copy_string (FILE *fin, struct obstack *oout, int match)
       c = getc (fin);
     }
 
-  obstack_1grow (oout, c);
+  if (store)
+    obstack_1grow (oout, c);
 }
 
+/* FIXME. */
 
-/*-----------------------------------------------------------------.
-| Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |
-| NULL).  In fact we just saw a `/', which might or might not be a |
-| comment.  In any case, copy what we saw.                         |
-|                                                                  |
-| OUT2 might be NULL.                                              |
-`-----------------------------------------------------------------*/
+static inline void
+copy_string (FILE *fin, struct obstack *oout, int match)
+{
+  copy_string2 (fin, oout, match, 1);
+}
+
+/* FIXME. */
 
 static inline void
-copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
+copy_identifier (FILE *fin, struct obstack *oout)
+{
+  int c;
+
+  while (isalnum (c = getc (fin)) || c == '_')
+    obstack_1grow (oout, c);
+
+  ungetc (c, fin);
+}
+
+
+/*------------------------------------------------------------------.
+| Dump the wannabee comment from IN to 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
+copy_comment (FILE *fin, struct obstack *oout)
 {
   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)))
     {
@@ -229,9 +262,7 @@ copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
       return;
     }
 
-  obstack_1grow (oout1, c);
-  if (oout2)
-    obstack_1grow (oout2, c);
+  obstack_1grow (oout, c);
   c = getc (fin);
 
   ended = 0;
@@ -241,26 +272,20 @@ copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
 	{
 	  while (c == '*')
 	    {
-	      obstack_1grow (oout1, c);
-	      if (oout2)
-		obstack_1grow (oout2, c);
+	      obstack_1grow (oout, 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++;
-	  obstack_1grow (oout1, c);
-	  if (oout2)
-	    obstack_1grow (oout2, c);
+	  obstack_1grow (oout, c);
 	  if (cplus_comment)
 	    ended = 1;
 	  else
@@ -270,27 +295,13 @@ copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
 	fatal (_("unterminated comment"));
       else
 	{
-	  obstack_1grow (oout1, c);
-	  if (oout2)
-	    obstack_1grow (oout2, c);
+	  obstack_1grow (oout, c);
 	  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 |
@@ -404,8 +415,11 @@ copy_definition (void)
   int after_percent;
 
   if (!no_lines_flag)
-    obstack_fgrow2 (&attrs_obstack, "#line %d %s\n",
-		    lineno, quotearg_style (c_quoting_style, infile));
+    {
+      obstack_fgrow2 (&attrs_obstack, muscle_find ("linef"),
+		      lineno, quotearg_style (c_quoting_style,
+					      muscle_find("filename")));
+    }
 
   after_percent = 0;
 
@@ -462,8 +476,8 @@ copy_definition (void)
 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;
@@ -512,7 +526,6 @@ parse_token_decl (symbol_class what_is, symbol_class what_is_not)
 	      /* symbol and symval combined are only one symbol */
 	      nsyms--;
 	    }
-	  translations = 1;
  	  symbol = NULL;
 	}
       else if (token == tok_identifier)
@@ -537,12 +550,12 @@ parse_token_decl (symbol_class what_is, symbol_class what_is_not)
       else if (symbol && token == tok_number)
 	{
 	  symbol->user_token_number = numval;
-	  translations = 1;
 	}
       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 ('%');
 	}
     }
@@ -679,7 +692,6 @@ parse_assoc_decl (associativity assoc)
 	  if (prev == tok_identifier)
 	    {
 	      symval->user_token_number = numval;
-	      translations = 1;
 	    }
 	  else
 	    {
@@ -699,16 +711,15 @@ token_buffer);
 	}
 
       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
@@ -716,29 +727,23 @@ parse_union_decl (void)
 {
   int c;
   int count = 0;
-
+  bool done = FALSE;
+  struct obstack union_obstack;
   if (typed)
     complain (_("multiple %s declarations"), "%union");
 
   typed = 1;
 
-  if (!no_lines_flag)
-    obstack_fgrow2 (&attrs_obstack, "\n#line %d %s\n",
-		    lineno, quotearg_style (c_quoting_style, infile));
-  else
-    obstack_1grow (&attrs_obstack, '\n');
-
-  obstack_sgrow (&attrs_obstack, "typedef union");
-  if (defines_flag)
-    obstack_sgrow (&defines_obstack, "typedef union");
-
-  c = getc (finput);
+  obstack_init (&union_obstack);
+  obstack_sgrow (&union_obstack, "union");
 
-  while (c != EOF)
+  while (!done)
     {
-      obstack_1grow (&attrs_obstack, c);
-      if (defines_flag)
-	obstack_1grow (&defines_obstack, c);
+      c = xgetc (finput);
+
+      /* If C contains '/', it is output by copy_comment ().  */
+      if (c != '/')
+	obstack_1grow (&union_obstack, c);
 
       switch (c)
 	{
@@ -747,7 +752,7 @@ parse_union_decl (void)
 	  break;
 
 	case '/':
-	  copy_comment2 (finput, &defines_obstack, &attrs_obstack);
+	  copy_comment (finput, &union_obstack);
 	  break;
 
 	case '{':
@@ -755,24 +760,22 @@ parse_union_decl (void)
 	  break;
 
 	case '}':
+	  /* FIXME: Errr.  How could this happen???. --akim */
 	  if (count == 0)
 	    complain (_("unmatched %s"), "`}'");
 	  count--;
-	  if (count <= 0)
-	    {
-	      obstack_sgrow (&attrs_obstack, " YYSTYPE;\n");
-	      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);
-	      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));
 }
 
 
@@ -820,9 +823,8 @@ parse_thong_decl (void)
   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)
     {
@@ -852,8 +854,6 @@ parse_thong_decl (void)
       usrtoknum = numval;
       token = lex ();		/* okay, did number, now get literal */
     }
-  else
-    usrtoknum = 0;
 
   /* process literal string token */
 
@@ -874,34 +874,96 @@ parse_thong_decl (void)
   nsyms--;
 }
 
-/*------------------------------------------.
-| Parse what comes after %header_extension. |
-`------------------------------------------*/
-
 static void
-parse_header_extension_decl (void)
+parse_muscle_decl (void)
 {
-  char buff[32];
+  int ch = ungetc (skip_white_space (), finput);
+  char* muscle_key;
+  char* muscle_value;
+
+  /* Read key. */
+  if (!isalpha (ch) && ch != '_')
+    {
+      complain (_("invalid %s declaration"), "%define");
+      skip_to_char ('%');
+      return;
+    }
+  copy_identifier (finput, &muscle_obstack);
+  obstack_1grow (&muscle_obstack, 0);
+  muscle_key = obstack_finish (&muscle_obstack);
 
-  if (header_extension)
-    complain (_("multiple %%header_extension declarations"));
-  fscanf (finput, "%s", buff);
-  header_extension = xstrdup (buff);
+  /* Read value. */
+  ch = skip_white_space ();
+  if (ch != '"')
+    {
+      ungetc (ch, finput);
+      if (ch != EOF)
+	{
+	  complain (_("invalid %s declaration"), "%define");
+	  skip_to_char ('%');
+	  return;
+	}
+      else
+	fatal (_("Premature EOF after %s"), "\"");
+    }
+  copy_string2 (finput, &muscle_obstack, '"', 0);
+  obstack_1grow (&muscle_obstack, 0);
+  muscle_value = obstack_finish (&muscle_obstack);
+
+  /* Store the (key, value) pair in the environment. */
+  muscle_insert (muscle_key, muscle_value);
 }
 
-/*------------------------------------------.
-| Parse what comes after %source_extension. |
-`------------------------------------------*/
 
-static void
-parse_source_extension_decl (void)
+
+/*---------------------------------.
+| Parse a double quoted parameter. |
+`---------------------------------*/
+
+static const char *
+parse_dquoted_param (const char *from)
 {
-  char buff[32];
+  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;
+    }
 
-  if (src_extension)
-    complain (_("multiple %%source_extension declarations"));
-  fscanf (finput, "%s", buff);
-  src_extension = xstrdup (buff);
+  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. |
+`----------------------------------*/
+
+static void
+parse_skel_decl (void)
+{
+  skeleton = parse_dquoted_param ("%skeleton");
 }
 
 /*----------------------------------------------------------------.
@@ -913,16 +975,13 @@ parse_source_extension_decl (void)
 static void
 read_declarations (void)
 {
-  int c;
-  int tok;
-
   for (;;)
     {
-      c = skip_white_space ();
+      int c = skip_white_space ();
 
       if (c == '%')
 	{
-	  tok = parse_percent_token ();
+	  token_t tok = parse_percent_token ();
 
 	  switch (tok)
 	    {
@@ -973,17 +1032,24 @@ read_declarations (void)
 	      parse_assoc_decl (non_assoc);
 	      break;
 
-	    case tok_hdrext:
-	      parse_header_extension_decl ();
+	    case tok_define:
+	      parse_muscle_decl ();
 	      break;
 
-	    case tok_srcext:
-	      parse_source_extension_decl ();
+	    case tok_skel:
+	      parse_skel_decl ();
 	      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 ('%');
@@ -1013,23 +1079,11 @@ copy_action (symbol_list *rule, int stack_offset)
 {
   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;
 
-  sprintf (buf, "\ncase %d:\n", nrules);
-  obstack_grow (&action_obstack, buf, strlen (buf));
-
-  if (!no_lines_flag)
-    {
-      sprintf (buf, "#line %d %s\n",
-	       lineno, quotearg_style (c_quoting_style, infile));
-      obstack_grow (&action_obstack, buf, strlen (buf));
-    }
-  obstack_1grow (&action_obstack, '{');
-
   count = 1;
   c = getc (finput);
 
@@ -1087,7 +1141,9 @@ copy_action (symbol_list *rule, int stack_offset)
 	}
     }
 
-  obstack_sgrow (&action_obstack, ";\n    break;}");
+  obstack_1grow (&action_obstack, '\0');
+  rule->action = obstack_finish (&action_obstack);
+  rule->action_line = lineno;
 }
 
 /*-------------------------------------------------------------------.
@@ -1112,8 +1168,9 @@ copy_guard (symbol_list *rule, int stack_offset)
 
   obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
   if (!no_lines_flag)
-    obstack_fgrow2 (&guard_obstack, "#line %d %s\n",
-		    lineno, quotearg_style (c_quoting_style, infile));
+    obstack_fgrow2 (&guard_obstack, muscle_find ("linef"),
+		    lineno, quotearg_style (c_quoting_style,
+					    muscle_find ("filename")));
   obstack_1grow (&guard_obstack, '{');
 
   count = 0;
@@ -1189,20 +1246,6 @@ copy_guard (symbol_list *rule, int stack_offset)
 }
 
 
-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.                                             |
@@ -1224,337 +1267,246 @@ gensym (void)
   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
 
-/*------------------------------------------------------------------.
-| 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;
-  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.  */
-  symbol_list *crule;
+  symbol_list *crule = NULL;
   /* 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)
-    {
-      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 || 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 (t == tok_identifier)
+	  {
+	    lhs = symval;
 
-	  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.  */
+	    if (!start_flag)
+	      {
+		startval = lhs;
+		start_flag = 1;
+	      }
 
-	  nrules++;
-	  nitems++;
+	    t = lex ();
+	    if (t != tok_colon)
+	      {
+		complain (_("ill-formed rule: initial symbol not followed by colon"));
+		unlex (t);
+	      }
+	  }
 
-	  record_rule_line ();
+	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.  */
 
-	  p = XCALLOC (symbol_list, 1);
-	  p->sym = lhs;
+	nrules++;
+	nitems++;
 
-	  crule1 = p1;
-	  if (p1)
-	    p1->next = p;
-	  else
-	    grammar = p;
+	p = symbol_list_new (lhs);
 
-	  p1 = p;
-	  crule = p;
+	crule1 = p1;
+	if (p1)
+	  p1->next = p;
+	else
+	  grammar = p;
 
-	  /* mark the rule's lhs as a nonterminal if not already so.  */
+	p1 = p;
+	crule = p;
 
-	  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);
+	/* mark the rule's lhs as a nonterminal if not already so.  */
 
-	  /* read the rhs of the rule.  */
+	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);
 
-	  for (;;)
-	    {
-	      t = lex ();
-	      if (t == tok_prec)
-		{
-		  t = lex ();
-		  crule->ruleprec = symval;
-		  t = lex ();
-		}
-
-	      if (!(t == tok_identifier || t == tok_left_curly))
-		break;
-
-	      /* If next token is an identifier, see if a colon follows it.
-	         If one does, exit this rule now.  */
-	      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)
-		{
-		  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 */
-
-	  /* Put an empty link in the list to mark the end of this rule  */
-	  p = XCALLOC (symbol_list, 1);
-	  p1->next = p;
-	  p1 = p;
+	/* read the rhs of the rule.  */
 
-	  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"));
+	for (;;)
+	  {
+	    t = lex ();
+	    if (t == tok_prec)
+	      {
+		t = lex ();
+		crule->ruleprec = symval;
+		t = lex ();
+	      }
+
+	    if (!(t == tok_identifier || t == tok_left_curly))
+	      break;
 
-	      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)
+	    /* 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.  */
+	      {
+		copy_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 ();
-	}
-#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
+	    crule->ruleprec = symval;
+	    t = lex ();
+	  }
+	if (t == tok_guard)
+	  {
+	    if (!semantic_parser)
+	      complain (_("%%guard present but %%semantic_parser not specified"));
 
-      else
-	{
-	  complain (_("invalid input: %s"), quote (token_buffer));
+	    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)
 	  t = lex ();
-	}
-    }
+      }
+    else
+      {
+	complain (_("invalid input: %s"), quote (token_buffer));
+	t = lex ();
+      }
+
 
   /* grammar has been read.  Do some checking */
 
@@ -1564,22 +1516,6 @@ readgram (void)
   if (nrules == 0)
     fatal (_("no rules in the input grammar"));
 
-  /* JF put out same default YYSTYPE as YACC does */
-  if (typed == 0
-      && !value_components_used)
-    {
-      /* We used to use `unsigned long' as YYSTYPE on MSDOS,
-         but it seems better to be consistent.
-         Most programs should declare their own type anyway.  */
-      obstack_sgrow (&attrs_obstack,
-			   "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
-      if (defines_flag)
-	obstack_sgrow (&defines_obstack, "\
-# ifndef YYSTYPE\n\
-#  define YYSTYPE int\n\
-# endif\n");
-    }
-
   /* Report any undefined symbols and consider them nonterminals.  */
 
   for (bp = firstsymbol; bp; bp = bp->next)
@@ -1594,54 +1530,70 @@ readgram (void)
 
   ntokens = nsyms - nvars;
 }
-
-/*--------------------------------------------------------------.
-| For named tokens, but not literal ones, define the name.  The |
-| value is the user token number.                               |
-`--------------------------------------------------------------*/
 
+/* At the end of the grammar file, some C source code must
+   be stored. It is going to be associated to the epilogue
+   directive.  */
 static void
-output_token_defines (struct obstack *oout)
+read_additionnal_code (void)
 {
-  bucket *bp;
-  char *cp, *symbol;
   char c;
+  struct obstack el_obstack;
 
-  for (bp = firstsymbol; bp; bp = bp->next)
+  obstack_init (&el_obstack);
+
+  if (!no_lines_flag)
     {
-      symbol = bp->tag;		/* get symbol */
+      obstack_fgrow2 (&el_obstack, muscle_find ("linef"),
+		      lineno, quotearg_style (c_quoting_style,
+					      muscle_find("filename")));
+    }
+
+  while ((c = getc (finput)) != EOF)
+    obstack_1grow (&el_obstack, c);
 
+  obstack_1grow (&el_obstack, 0);
+  muscle_insert ("epilogue", obstack_finish (&el_obstack));
+}
+
+
+/*------------------------------------------------------------------.
+| 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;
-      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;
+      assert (bp->user_token_number != SUNDEF);
 
-      obstack_fgrow2 (oout, "# define\t%s\t%d\n",
-		      symbol,
-		      (translations ? bp->user_token_number : bp->value));
-      if (semantic_parser)
-	obstack_fgrow2 (oout, "# define\tT%s\t%d\n", symbol, bp->value);
+      /* 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;
     }
-
-  obstack_1grow (oout, '\n');
 }
 
 
@@ -1654,22 +1606,21 @@ output_token_defines (struct obstack *oout)
 static void
 packsymbols (void)
 {
-  bucket *bp;
+  bucket *bp = NULL;
   int tokno = 1;
-  int i;
   int last_user_token_number;
   static char DOLLAR[] = "$";
 
-  /* int lossage = 0; JF set but not used */
-
   tags = XCALLOC (char *, nsyms + 1);
-  tags[0] = DOLLAR;
   user_toknums = XCALLOC (short, nsyms + 1);
-  user_toknums[0] = 0;
 
   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;
 
@@ -1722,7 +1673,7 @@ packsymbols (void)
 
       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;
@@ -1732,76 +1683,72 @@ packsymbols (void)
       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;
 
-  if (!no_parser_flag)
-    output_token_defines (&table_obstack);
-
   if (startval->class == unknown_sym)
     fatal (_("the start symbol %s is undefined"), startval->tag);
   else if (startval->class == token_sym)
     fatal (_("the start symbol %s is a token"), startval->tag);
 
   start_symbol = startval->value;
+}
+
+
+/*---------------------------------------------------------------.
+| Save the definition of token names in the `TOKENDEFS' muscle.  |
+`---------------------------------------------------------------*/
+
+static void
+symbols_save (void)
+{
+  struct obstack tokendefs;
+  bucket *bp;
+  char *cp, *symbol;
+  char c;
+  obstack_init (&tokendefs);
 
-  if (defines_flag)
+  for (bp = firstsymbol; bp; bp = bp->next)
     {
-      output_token_defines (&defines_obstack);
+      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
-	    obstack_sgrow (&defines_obstack,
-				 "\nextern YYSTYPE yylval;\n");
+	    continue;
 	}
 
+      /* Don't #define nonliteral tokens whose names contain periods.  */
+      cp = symbol;
+      while ((c = *cp++) && c != '.');
+      if (c != '\0')
+	continue;
+
+      obstack_fgrow2 (&tokendefs, "# define\t%s\t%d\n",
+		      symbol, bp->user_token_number);
       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);
-	  }
-#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
+	/* FIXME: This is probably wrong, and should be just as
+	   above. --akim.  */
+	obstack_fgrow2 (&tokendefs, "# define\tT%s\t%d\n", symbol, bp->value);
     }
+
+  obstack_1grow (&tokendefs, 0);
+  muscle_insert ("tokendef", xstrdup (obstack_finish (&tokendefs)));
+  obstack_free (&tokendefs, NULL);
 }
 
 
@@ -1817,14 +1764,8 @@ packgram (void)
   int ruleno;
   symbol_list *p;
 
-  bucket *ruleprec;
-
   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;
@@ -1832,9 +1773,13 @@ packgram (void)
   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;
+      rule_table[ruleno].action = p->action;
+      rule_table[ruleno].action_line = p->action_line;
 
       p = p->next;
       while (p && p->sym)
@@ -1844,8 +1789,8 @@ packgram (void)
 	     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;
@@ -1855,9 +1800,9 @@ packgram (void)
          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;
@@ -1868,6 +1813,9 @@ packgram (void)
     }
 
   ritem[itemno] = 0;
+
+  if (trace_flag)
+    ritem_print (stderr);
 }
 
 /*-------------------------------------------------------------------.
@@ -1884,21 +1832,10 @@ reader (void)
   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;
-  rline_allocated = 10;
-  rline = XCALLOC (short, rline_allocated);
 
   typed = 0;
   lastprec = 0;
@@ -1908,15 +1845,20 @@ reader (void)
 
   grammar = NULL;
 
-  init_lex ();
+  lex_init ();
   lineno = 1;
 
+  /* Initialize the muscle obstack.  */
+  obstack_init (&muscle_obstack);
+
   /* Initialize the symbol table.  */
   tabinit ();
+
   /* Construct the error token */
   errtoken = getsym ("error");
   errtoken->class = token_sym;
   errtoken->user_token_number = 256;	/* Value specified by POSIX.  */
+
   /* Construct a token that represents all undefined literal tokens.
      It is always token number 2.  */
   undeftoken = getsym ("$undefined.");
@@ -1926,63 +1868,19 @@ reader (void)
   /* Read the declaration section.  Copy %{ ... %} groups to
      TABLE_OBSTACK and FDEFINES file.  Also notice any %token, %left,
      etc. found there.  */
-  obstack_1grow (&table_obstack, '\n');
-  obstack_fgrow3 (&table_obstack, "\
-/* %s, made from %s\n\
-   by GNU bison %s.  */\n\
-\n",
-		  no_parser_flag ? "Bison-generated parse tables" : "A Bison parser",
-		  infile, VERSION);
-
-  obstack_sgrow (&table_obstack,
-		       "#define YYBISON 1  /* Identify Bison output.  */\n\n");
   read_declarations ();
-  /* Start writing the guard and action files, if they are needed.  */
-  output_headers ();
   /* Read in the grammar, build grammar in list form.  Write out
      guards and actions.  */
   readgram ();
-  /* Now we know whether we need the line-number stack.  If we do,
-     write its type into the .tab.h file.  */
-  if (defines_flag)
-    reader_output_yylsp (&defines_obstack);
-  /* Write closing delimiters for actions and guards.  */
-  output_trailers ();
-  if (locations_flag)
-    obstack_sgrow (&table_obstack, "#define YYLSP_NEEDED 1\n\n");
+  /* Some C code is given at the end of the grammar file. */
+  read_additionnal_code ();
+
   /* Assign the symbols their symbol numbers.  Write #defines for the
      token symbols into FDEFINES if requested.  */
   packsymbols ();
+  /* Save them. */
+  symbols_save ();
+
   /* Convert the grammar into the format described in gram.h.  */
   packgram ();
-  /* Free the symbol table data structure since symbols are now all
-     referred to by symbol number.  */
-  free_symtab ();
-}
-
-
-/*------------------------------------------------------------------.
-| Define YYLTYPE.  Cannot be in the skeleton since we might have to |
-| output it in the headers if --defines is used.                    |
-`------------------------------------------------------------------*/
-
-void
-reader_output_yylsp (struct obstack *oout)
-{
-  if (locations_flag)
-    obstack_sgrow (oout, "\
-\n\
-#ifndef YYLTYPE\n\
-typedef struct yyltype\n\
-{\n\
-  int first_line;\n\
-  int first_column;\n\
-\n\
-  int last_line;\n\
-  int last_column;\n\
-} yyltype;\n\
-\n\
-# define YYLTYPE yyltype\n\
-#endif\n\
-\n");
 }