Fix the previous test.

[bison.git] / src / reader.c

diff --git a/src/reader.c b/src/reader.c
index 8db4183192ac2ee1ea04f780c6ff234ab51a6570..cf3e18f370bc289c7d6c0e47569a2fd988a5ce66 100644 (file)
--- a/src/reader.c
+++ b/src/reader.c
@@ -1,650 +1,604 @@
 /* Input parser for bison
 /* Input parser for bison

-   Copyright (C) 1984, 1986, 1989, 1992, 1998 Free Software Foundation, Inc.
+   Copyright 1984, 1986, 1989, 1992, 1998, 2000, 2001
+   Free Software Foundation, Inc.

 
 

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

 
 

-Bison is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+   Bison is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.

 
 

-Bison is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+   Bison is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.

 
 

-You should have received a copy of the GNU General Public License
-along with Bison; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with Bison; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */

 
 
 
 

-/* read in the grammar specification and record it in the format described in gram.h.
-  All guards are copied into the fguard file and all actions into faction,
-  in each case forming the body of a C function (yyguard or yyaction)
-  which contains a switch statement to decide which guard or action to execute.
-
-The entry point is reader().  */
-
-#include <stdio.h>

 #include "system.h"
 #include "system.h"

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

 #include "files.h"
 #include "files.h"

-#include "alloc.h"

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

+#include "options.h"

 #include "lex.h"
 #include "gram.h"
 #include "lex.h"
 #include "gram.h"

-#include "machine.h"
-
-#define        LTYPESTR        "\n#ifndef YYLTYPE\ntypedef\n  struct yyltype\n\
-    {\n      int timestamp;\n      int first_line;\n      int first_column;\
-\n      int last_line;\n      int last_column;\n      char *text;\n   }\n\
-  yyltype;\n\n#define YYLTYPE yyltype\n#endif\n\n"
-
-/* Number of slots allocated (but not necessarily used yet) in `rline'  */
-int rline_allocated;
-
-extern char *program_name;
-extern int definesflag;
-extern int nolinesflag;
-extern int noparserflag;
-extern int rawtoknumflag;
-extern bucket *symval;
-extern int numval;
-extern int expected_conflicts;
-extern char *token_buffer;
-extern int maxtoken;
-
-extern void init_lex PARAMS((void));
-extern char *grow_token_buffer PARAMS((char *));
-extern void tabinit PARAMS((void));
-extern void output_headers PARAMS((void));
-extern void output_trailers PARAMS((void));
-extern void free_symtab PARAMS((void));
-extern void open_extra_files PARAMS((void));
-extern char *int_to_string PARAMS((int));
-extern char *printable_version PARAMS((int));
-extern void fatal PARAMS((char *));
-extern void fatals PARAMS((char *, char *));
-extern void warn PARAMS((char *));
-extern void warni PARAMS((char *, int));
-extern void warns PARAMS((char *, char *));
-extern void warnss PARAMS((char *, char *, char *));
-extern void warnsss PARAMS((char *, char *, char *, char *));
-extern void unlex PARAMS((int));
-extern void done PARAMS((int));
-
-extern int skip_white_space PARAMS((void));
-extern int parse_percent_token PARAMS((void));
-extern int lex PARAMS((void));
-
-typedef
-  struct symbol_list
-    {
-      struct symbol_list *next;
-      bucket *sym;
-      bucket *ruleprec;
-    }
-  symbol_list;
-
-
-void reader PARAMS((void));
-void reader_output_yylsp PARAMS((FILE *));
-void read_declarations PARAMS((void));
-void copy_definition PARAMS((void));
-void parse_token_decl PARAMS((int, int));
-void parse_start_decl PARAMS((void));
-void parse_type_decl PARAMS((void));
-void parse_assoc_decl PARAMS((int));
-void parse_union_decl PARAMS((void));
-void parse_expect_decl PARAMS((void));
-char *get_type_name PARAMS((int, symbol_list *));
-void copy_guard PARAMS((symbol_list *, int));
-void parse_thong_decl PARAMS((void));
-void copy_action PARAMS((symbol_list *, int));
-bucket *gensym PARAMS((void));
-void readgram PARAMS((void));
-void record_rule_line PARAMS((void));
-void packsymbols PARAMS((void));
-void output_token_defines PARAMS((FILE *));
-void packgram PARAMS((void));
-int read_signed_integer PARAMS((FILE *));
-static int get_type PARAMS((void));
+#include "complain.h"
+#include "output.h"
+#include "reader.h"
+#include "conflicts.h"
+#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;
+
+  /* The guard is attached to the LHS of a rule. */
+  const char *guard;
+  int guard_line;
+  bucket *ruleprec;
+} symbol_list;

 
 int lineno;
 
 int lineno;

-symbol_list *grammar;
-int start_flag;
-bucket *startval;
-char **tags;
-int *user_toknums;
+static symbol_list *grammar;
+static int start_flag;
+static bucket *startval;

 
 /* Nonzero if components of semantic values are used, implying
    they must be unions.  */
 static int value_components_used;
 
 
 /* Nonzero if components of semantic values are used, implying
    they must be unions.  */
 static int value_components_used;
 

-static int typed;  /* nonzero if %union has been seen.  */
+/* Nonzero if %union has been seen.  */
+static int typed;

 
 

-static int lastprec;  /* incremented for each %left, %right or %nonassoc seen */
+/* Incremented for each %left, %right or %nonassoc seen */
+static int lastprec;

 
 

-static int gensym_count;  /* incremented for each generated symbol */
+static bucket *errtoken = NULL;
+static bucket *undeftoken = NULL;
+static bucket *eoftoken = NULL;
+static bucket *axiom = NULL;

 
 

-static bucket *errtoken;
-static bucket *undeftoken;
-
-/* Nonzero if any action or guard uses the @n construct.  */
-static int yylsp_needed;
+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;
+}

 
 

-extern char *version_string;
+\f

 
 

+/*===================\
+| Low level lexing.  |
+\===================*/

 
 static void
 skip_to_char (int target)
 {
   int c;
   if (target == '\n')
 
 static void
 skip_to_char (int target)
 {
   int c;
   if (target == '\n')

-    warn(_("   Skipping to next \\n"));
+    complain (_("   Skipping to next \\n"));

   else
   else

-    warni(_("   Skipping to next %c"), target);
+    complain (_("   Skipping to next %c"), target);

 
   do
 
   do

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

   while (c != target && c != EOF);
   if (c != EOF)
   while (c != target && c != EOF);
   if (c != EOF)

-    ungetc(c, finput);
+    ungetc (c, finput);

 }
 
 
 }
 
 

-void
-reader (void)
+/*---------------------------------------------------------.
+| Read a signed integer from STREAM and return its value.  |
+`---------------------------------------------------------*/
+
+static inline int
+read_signed_integer (FILE *stream)

 {
 {

-  start_flag = 0;
-  startval = NULL;  /* start symbol not specified yet. */
+  int c = getc (stream);
+  int sign = 1;
+  int n = 0;

 
 

-#if 0
-  translations = 0;  /* initially assume token number translation not needed.  */
-#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;
+  if (c == '-')
+    {
+      c = getc (stream);
+      sign = -1;
+    }

 
 

-  nsyms = 1;
-  nvars = 0;
-  nrules = 0;
-  nitems = 0;
-  rline_allocated = 10;
-  rline = NEW2(rline_allocated, short);
+  while (isdigit (c))
+    {
+      n = 10 * n + (c - '0');
+      c = getc (stream);
+    }

 
 

-  typed = 0;
-  lastprec = 0;
+  ungetc (c, stream);

 
 

-  gensym_count = 0;
+  return sign * n;
+}
+\f
+/*--------------------------------------------------------------.
+| Get the data type (alternative in the union) of the value for |
+| symbol N in rule RULE.                                        |
+`--------------------------------------------------------------*/

 
 

-  semantic_parser = 0;
-  pure_parser = 0;
-  yylsp_needed = 0;
+static char *
+get_type_name (int n, symbol_list *rule)
+{
+  int i;
+  symbol_list *rp;

 
 

-  grammar = NULL;
+  if (n < 0)
+    {
+      complain (_("invalid $ value"));
+      return NULL;
+    }

 
 

-  init_lex();
-  lineno = 1;
+  rp = rule;
+  i = 0;

 
 

-  /* initialize the symbol table.  */
-  tabinit();
-  /* construct the error token */
-  errtoken = getsym("error");
-  errtoken->class = STOKEN;
-  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.");
-  undeftoken->class = STOKEN;
-  undeftoken->user_token_number = 2;
-  /* Read the declaration section.  Copy %{ ... %} groups to ftable and fdefines file.
-     Also notice any %token, %left, etc. found there.  */
-  if (noparserflag)
-    fprintf(ftable, "\n/*  Bison-generated parse tables, made from %s\n",
-               infile);
-  else
-    fprintf(ftable, "\n/*  A Bison parser, made from %s\n", infile);
-  fprintf(ftable, " by  %s  */\n\n", version_string);
-  fprintf(ftable, "#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 (fdefines)
-    reader_output_yylsp(fdefines);
-  /* write closing delimiters for actions and guards.  */
-  output_trailers();
-  if (yylsp_needed)
-    fprintf(ftable, "#define YYLSP_NEEDED\n\n");
-  /* 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();
+  while (i < n)
+    {
+      rp = rp->next;
+      if (rp == NULL || rp->sym == NULL)
+       {
+         complain (_("invalid $ value"));
+         return NULL;
+       }
+      i++;
+    }
+
+  return rp->sym->type_name;

 }
 }

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

 
 

-void
-reader_output_yylsp (FILE *f)
+static inline void
+copy_string2 (FILE *fin, struct obstack *oout, int match, int store)

 {
 {

-  if (yylsp_needed)
-    fprintf(f, LTYPESTR);
-}
+  int c;

 
 

-/* read from finput until %% is seen.  Discard the %%.
-Handle any % declarations,
-and copy the contents of any %{ ... %} groups to fattrs.  */
+  if (store)
+    obstack_1grow (oout, match);

 
 

-void
-read_declarations (void)
-{
-  register int c;
-  register int tok;
+  c = getc (fin);

 
 

-  for (;;)
+  while (c != match)

     {
     {

-      c = skip_white_space();
+      if (c == EOF)
+       fatal (_("unterminated string at end of file"));
+      if (c == '\n')
+       {
+         complain (_("unterminated string"));
+         ungetc (c, fin);
+         c = match;            /* invent terminator */
+         continue;
+       }

 
 

-      if (c == '%')
+      obstack_1grow (oout, c);
+
+      if (c == '\\')

        {
        {

-         tok = parse_percent_token();
+         c = getc (fin);
+         if (c == EOF)
+           fatal (_("unterminated string at end of file"));
+         obstack_1grow (oout, c);

 
 

-         switch (tok)
-           {
-           case TWO_PERCENTS:
-             return;
+         if (c == '\n')
+           lineno++;
+       }

 
 

-           case PERCENT_LEFT_CURLY:
-             copy_definition();
-             break;
+      c = getc (fin);
+    }

 
 

-           case TOKEN:
-             parse_token_decl (STOKEN, SNTERM);
-             break;
+  if (store)
+    obstack_1grow (oout, c);
+}

 
 

-           case NTERM:
-             parse_token_decl (SNTERM, STOKEN);
-             break;
+/* FIXME. */

 
 

-           case TYPE:
-             parse_type_decl();
-             break;
+static inline void
+copy_string (FILE *fin, struct obstack *oout, int match)
+{
+  copy_string2 (fin, oout, match, 1);
+}

 
 

-           case START:
-             parse_start_decl();
-             break;
+/* FIXME. */

 
 

-           case UNION:
-             parse_union_decl();
-             break;
+static inline void
+copy_identifier (FILE *fin, struct obstack *oout)
+{
+  int c;

 
 

-           case EXPECT:
-             parse_expect_decl();
-             break;
-           case THONG:
-             parse_thong_decl();
-             break;
-           case LEFT:
-             parse_assoc_decl(LEFT_ASSOC);
-             break;
+  while (isalnum (c = getc (fin)) || c == '_')
+    obstack_1grow (oout, c);

 
 

-           case RIGHT:
-             parse_assoc_decl(RIGHT_ASSOC);
-             break;
+  ungetc (c, fin);
+}

 
 

-           case NONASSOC:
-             parse_assoc_decl(NON_ASSOC);
-             break;

 
 

-           case SEMANTIC_PARSER:
-             if (semantic_parser == 0)
-               {
-                 semantic_parser = 1;
-                 open_extra_files();
-               }
-             break;
+/*------------------------------------------------------------------.
+| 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.                                                      |
+`------------------------------------------------------------------*/

 
 

-           case PURE_PARSER:
-             pure_parser = 1;
-             break;
+static inline void
+copy_comment (FILE *fin, struct obstack *oout)
+{
+  int cplus_comment;
+  int ended;
+  int c;

 
 

-           case NOOP:
-             break;
+  /* We read a `/', output it. */
+  obstack_1grow (oout, '/');

 
 

-           default:
-             warns(_("unrecognized: %s"), token_buffer);
-             skip_to_char('%');
-         }
+  switch ((c = getc (fin)))
+    {
+    case '/':
+      cplus_comment = 1;
+      break;
+    case '*':
+      cplus_comment = 0;
+      break;
+    default:
+      ungetc (c, fin);
+      return;
+    }
+
+  obstack_1grow (oout, c);
+  c = getc (fin);
+
+  ended = 0;
+  while (!ended)
+    {
+      if (!cplus_comment && c == '*')
+       {
+         while (c == '*')
+           {
+             obstack_1grow (oout, c);
+             c = getc (fin);
+           }
+
+         if (c == '/')
+           {
+             obstack_1grow (oout, c);
+             ended = 1;
+           }
+       }
+      else if (c == '\n')
+       {
+         lineno++;
+         obstack_1grow (oout, c);
+         if (cplus_comment)
+           ended = 1;
+         else
+           c = getc (fin);

        }
       else if (c == EOF)
        }
       else if (c == EOF)

-        fatal(_("no input grammar"));
+       fatal (_("unterminated comment"));

       else
        {
       else
        {

-               char buff[100];
-               sprintf(buff, _("unknown character: %s"), printable_version(c));
-               warn(buff);
-               skip_to_char('%');
+         obstack_1grow (oout, c);
+         c = getc (fin);

        }
     }
 }
 
 
        }
     }
 }
 
 

-/* copy the contents of a %{ ... %} into the definitions file.
-The %{ has already been read.  Return after reading the %}.  */
+/*-----------------------------------------------------------------.
+| FIN is pointing to a location (i.e., a `@').  Output to OOUT a   |
+| reference to this location. STACK_OFFSET is the number of values |
+| in the current rule so far, which says where to find `$0' with   |
+| respect to the top of the stack.                                 |
+`-----------------------------------------------------------------*/

 
 

-void
+static inline void
+copy_at (FILE *fin, struct obstack *oout, int stack_offset)
+{
+  int c;
+
+  c = getc (fin);
+  if (c == '$')
+    {
+      obstack_sgrow (oout, "yyloc");
+      locations_flag = 1;
+    }
+  else if (isdigit (c) || c == '-')
+    {
+      int n;
+
+      ungetc (c, fin);
+      n = read_signed_integer (fin);
+      if (n > stack_offset)
+       complain (_("invalid value: %s%d"), "@", n);
+      else
+       {
+         /* Offset is always 0 if parser has already popped the stack
+            pointer.  */
+         obstack_fgrow1 (oout, "yylsp[%d]",
+                         n - (semantic_parser ? 0 : stack_offset));
+         locations_flag = 1;
+       }
+    }
+  else
+    {
+      char buf[] = "@c";
+      buf[1] = c;
+      complain (_("%s is invalid"), quote (buf));
+    }
+}
+
+
+/*-------------------------------------------------------------------.
+| FIN is pointing to a wannabee semantic value (i.e., a `$').        |
+|                                                                    |
+| Possible inputs: $[<TYPENAME>]($|integer)                          |
+|                                                                    |
+| Output to OOUT a reference to this semantic value. STACK_OFFSET is |
+| the number of values in the current rule so far, which says where  |
+| to find `$0' with respect to the top of the stack.                 |
+`-------------------------------------------------------------------*/
+
+static inline void
+copy_dollar (FILE *fin, struct obstack *oout,
+            symbol_list *rule, int stack_offset)
+{
+  int c = getc (fin);
+  const char *type_name = NULL;
+
+  /* Get the type name if explicit. */
+  if (c == '<')
+    {
+      read_type_name (fin);
+      type_name = token_buffer;
+      value_components_used = 1;
+      c = getc (fin);
+    }
+
+  if (c == '$')
+    {
+      obstack_sgrow (oout, "yyval");
+
+      if (!type_name)
+       type_name = get_type_name (0, rule);
+      if (type_name)
+       obstack_fgrow1 (oout, ".%s", type_name);
+      if (!type_name && typed)
+       complain (_("$$ of `%s' has no declared type"),
+                 rule->sym->tag);
+    }
+  else if (isdigit (c) || c == '-')
+    {
+      int n;
+      ungetc (c, fin);
+      n = read_signed_integer (fin);
+
+      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
+    {
+      char buf[] = "$c";
+      buf[1] = c;
+      complain (_("%s is invalid"), quote (buf));
+    }
+}
+\f
+/*-------------------------------------------------------------------.
+| Copy the contents of a `%{ ... %}' into the definitions file.  The |
+| `%{' has already been read.  Return after reading the `%}'.        |
+`-------------------------------------------------------------------*/
+
+static void

 copy_definition (void)
 {
 copy_definition (void)
 {

-  register int c;
-  register int match;
-  register int ended;
-  register int after_percent;  /* -1 while reading a character if prev char was % */
-  int cplus_comment;
+  int c;
+  /* -1 while reading a character if prev char was %. */
+  int after_percent;

 
 

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

 
   after_percent = 0;
 
 
   after_percent = 0;
 

-  c = getc(finput);
+  c = getc (finput);

 
   for (;;)
     {
       switch (c)
        {
        case '\n':
 
   for (;;)
     {
       switch (c)
        {
        case '\n':

-         putc(c, fattrs);
+         obstack_1grow (&attrs_obstack, c);

          lineno++;
          break;
 
        case '%':
          lineno++;
          break;
 
        case '%':

-          after_percent = -1;
+         after_percent = -1;

          break;
 
        case '\'':
        case '"':
          break;
 
        case '\'':
        case '"':

-         match = c;
-         putc(c, fattrs);
-         c = getc(finput);
-
-         while (c != match)
-           {
-             if (c == EOF)
-               fatal(_("unterminated string at end of file"));
-             if (c == '\n')
-               {
-                 warn(_("unterminated string"));
-                 ungetc(c, finput);
-                 c = match;
-                 continue;
-               }
-
-             putc(c, fattrs);
-
-             if (c == '\\')
-               {
-                 c = getc(finput);
-                 if (c == EOF)
-                   fatal(_("unterminated string at end of file"));
-                 putc(c, fattrs);
-                 if (c == '\n')
-                   lineno++;
-               }
-
-             c = getc(finput);
-           }
-
-         putc(c, fattrs);
+         copy_string (finput, &attrs_obstack, c);

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

-         putc(c, fattrs);
-         c = getc(finput);
-         if (c != '*' && c != '/')
-           continue;
-
-         cplus_comment = (c == '/');
-         putc(c, fattrs);
-         c = getc(finput);
-
-         ended = 0;
-         while (!ended)
-           {
-             if (!cplus_comment && c == '*')
-               {
-                 while (c == '*')
-                   {
-                     putc(c, fattrs);
-                     c = getc(finput);
-                   }
-
-                 if (c == '/')
-                   {
-                     putc(c, fattrs);
-                     ended = 1;
-                   }
-               }
-             else if (c == '\n')
-               {
-                 lineno++;
-                 putc(c, fattrs);
-                 if (cplus_comment)
-                   ended = 1;
-                 else
-                   c = getc(finput);
-               }
-             else if (c == EOF)
-               fatal(_("unterminated comment in `%{' definition"));
-             else
-               {
-                 putc(c, fattrs);
-                 c = getc(finput);
-               }
-           }
-
+         copy_comment (finput, &attrs_obstack);

          break;
 
        case EOF:
          break;
 
        case EOF:

-         fatal(_("unterminated `%{' definition"));
+         fatal ("%s", _("unterminated `%{' definition"));

 
        default:
 
        default:

-         putc(c, fattrs);
+         obstack_1grow (&attrs_obstack, c);

        }
 
        }
 

-      c = getc(finput);
+      c = getc (finput);

 
       if (after_percent)
        {
          if (c == '}')
            return;
 
       if (after_percent)
        {
          if (c == '}')
            return;

-         putc('%', fattrs);
+         obstack_1grow (&attrs_obstack, '%');

        }
       after_percent = 0;
        }
       after_percent = 0;

-

     }
     }

-

 }
 
 
 }
 
 

+/*-------------------------------------------------------------------.
+| Parse what comes after %token or %nterm.  For %token, WHAT_IS is   |
+| token_sym and WHAT_IS_NOT is nterm_sym.  For %nterm, the arguments |
+| are reversed.                                                      |
+`-------------------------------------------------------------------*/

 
 

-/* parse what comes after %token or %nterm.
-For %token, what_is is STOKEN and what_is_not is SNTERM.
-For %nterm, the arguments are reversed.  */
-
-void
-parse_token_decl (int what_is, int what_is_not)
+static void
+parse_token_decl (symbol_class what_is, symbol_class what_is_not)

 {
 {

-  register int token = 0;
-  register char *typename = 0;
-  register struct bucket *symbol = NULL;  /* pts to symbol being defined */
-  int k;
+  token_t token = tok_undef;
+  char *typename = NULL;
+
+  /* The symbol being defined.  */
+  struct bucket *symbol = NULL;

 
 

+  /* After `%token' and `%nterm', any number of symbols maybe be
+     defined.  */

   for (;;)
     {
       int tmp_char = ungetc (skip_white_space (), finput);
 
   for (;;)
     {
       int tmp_char = ungetc (skip_white_space (), finput);
 

+      /* `%' (for instance from `%token', or from `%%' etc.) is the
+        only valid means to end this declaration.  */

       if (tmp_char == '%')
        return;
       if (tmp_char == EOF)
       if (tmp_char == '%')
        return;
       if (tmp_char == EOF)

-       fatals ("Premature EOF after %s", token_buffer);
+       fatal (_("Premature EOF after %s"), token_buffer);

 
 

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

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

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

        {
        {

-         k = strlen(token_buffer);
-         typename = NEW2(k + 1, char);
-         strcpy(typename, token_buffer);
+         typename = xstrdup (token_buffer);

          value_components_used = 1;
          symbol = NULL;
        }
          value_components_used = 1;
          symbol = NULL;
        }

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

        {
        {

-         translations = 1;
-         symval->class = STOKEN;
-         symval->type_name = typename;
-         symval->user_token_number = symbol->user_token_number;
-         symbol->user_token_number = SALIAS;
-
-         symval->alias = symbol;
-         symbol->alias = symval;
-         symbol = NULL;
-
-         nsyms--;   /* symbol and symval combined are only one symbol */
+         if (symval->alias)
+           warn (_("symbol `%s' used more than once as a literal string"),
+                 symval->tag);
+         else if (symbol->alias)
+           warn (_("symbol `%s' given more than one literal string"),
+                 symbol->tag);
+         else
+           {
+             symval->class = token_sym;
+             symval->type_name = typename;
+             symval->user_token_number = symbol->user_token_number;
+             symbol->user_token_number = SALIAS;
+             symval->alias = symbol;
+             symbol->alias = symval;
+             /* symbol and symval combined are only one symbol */
+             nsyms--;
+           }
+         symbol = NULL;

        }
        }

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

        {
          int oldclass = symval->class;
          symbol = symval;
 
          if (symbol->class == what_is_not)
        {
          int oldclass = symval->class;
          symbol = symval;
 
          if (symbol->class == what_is_not)

-           warns(_("symbol %s redefined"), symbol->tag);
+           complain (_("symbol %s redefined"), symbol->tag);

          symbol->class = what_is;
          symbol->class = what_is;

-         if (what_is == SNTERM && oldclass != SNTERM)
+         if (what_is == nterm_sym && oldclass != nterm_sym)

            symbol->value = nvars++;
 
          if (typename)
            {
              if (symbol->type_name == NULL)
                symbol->type_name = typename;
            symbol->value = nvars++;
 
          if (typename)
            {
              if (symbol->type_name == NULL)
                symbol->type_name = typename;

-             else if (strcmp(typename, symbol->type_name) != 0)
-               warns(_("type redeclaration for %s"), symbol->tag);
+             else if (strcmp (typename, symbol->type_name) != 0)
+               complain (_("type redeclaration for %s"), symbol->tag);

            }
        }
            }
        }

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

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

-         translations = 1;
-        }
+         /* User defined EOF token? */
+         if (numval == 0)
+           eoftoken = symbol;
+       }

       else
        {
       else
        {

-         warnss(_("`%s' is invalid in %s"),
-               token_buffer,
-               (what_is == STOKEN) ? "%token" : "%nterm");
-         skip_to_char('%');
+         complain (_("`%s' is invalid in %s"),
+                   token_buffer,
+                   (what_is == token_sym) ? "%token" : "%nterm");
+         skip_to_char ('%');

        }
     }
 
 }
 
        }
     }
 
 }
 

-/* parse what comes after %thong
-       the full syntax is
-               %thong <type> token number literal
- the <type> or number may be omitted.  The number specifies the
- user_token_number.
-
- Two symbols are entered in the table, one for the token symbol and
- one for the literal.  Both are given the <type>, if any, from the declaration.
- The ->user_token_number of the first is SALIAS and the ->user_token_number
- of the second is set to the number, if any, from the declaration.
- The two symbols are linked via pointers in their ->alias fields.
-
- during output_defines_table, the symbol is reported
- thereafter, only the literal string is retained
- it is the literal string that is output to yytname
-*/
-
-void
-parse_thong_decl (void)
-{
-  register int token;
-  register struct bucket *symbol;
-  register char *typename = 0;
-  int k, usrtoknum;
-
-  translations = 1;
-  token = lex();               /* fetch typename or first token */
-  if (token == TYPENAME) {
-    k = strlen(token_buffer);
-    typename = NEW2(k + 1, char);
-    strcpy(typename, token_buffer);
-    value_components_used = 1;
-    token = lex();             /* fetch first token */
-  }
-
-  /* process first token */
-
-  if (token != IDENTIFIER)
-    {
-      warns(_("unrecognized item %s, expected an identifier"),
-           token_buffer);
-      skip_to_char('%');
-      return;
-    }
-  symval->class = STOKEN;
-  symval->type_name = typename;
-  symval->user_token_number = SALIAS;
-  symbol = symval;
-
-  token = lex();               /* get number or literal string */
-
-  if (token == NUMBER) {
-    usrtoknum = numval;
-    token = lex();             /* okay, did number, now get literal */
-  }
-  else usrtoknum = 0;
-
-  /* process literal string token */
-
-  if (token != IDENTIFIER || *symval->tag != '\"')
-    {
-      warns(_("expected string constant instead of %s"),
-           token_buffer);
-      skip_to_char('%');
-      return;
-    }
-  symval->class = STOKEN;
-  symval->type_name = typename;
-  symval->user_token_number = usrtoknum;
-
-  symval->alias = symbol;
-  symbol->alias = symval;
-
-  nsyms--;                     /* symbol and symval combined are only one symbol */
-}
-

 
 

-/* parse what comes after %start */
+/*------------------------------.
+| Parse what comes after %start |
+`------------------------------*/

 
 

-void
+static void

 parse_start_decl (void)
 {
   if (start_flag)
 parse_start_decl (void)
 {
   if (start_flag)

-    warn(_("multiple %start declarations"));
-  if (lex() != IDENTIFIER)
-    warn(_("invalid %start declaration"));
+    complain (_("multiple %s declarations"), "%start");
+  if (lex () != tok_identifier)
+    complain (_("invalid %s declaration"), "%start");

   else
     {
       start_flag = 1;
   else
     {
       start_flag = 1;


@@ -652,181 +606,169 @@ parse_start_decl (void)
     }
 }
 
     }
 }
 

+/*-----------------------------------------------------------.
+| read in a %type declaration and record its information for |
+| get_type_name to access                                    |
+`-----------------------------------------------------------*/

 
 

-
-/* read in a %type declaration and record its information for get_type_name to access */
-
-void
+static void

 parse_type_decl (void)
 {
 parse_type_decl (void)
 {

-  register int k;
-  register char *name;
+  char *name;

 
 

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

     {
     {

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

       return;
     }
 
       return;
     }
 

-  k = strlen(token_buffer);
-  name = NEW2(k + 1, char);
-  strcpy(name, token_buffer);
+  name = xstrdup (token_buffer);

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

-      register int t;
+      token_t t;

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

-       fatals ("Premature EOF after %s", token_buffer);
+       fatal (_("Premature EOF after %s"), token_buffer);

 
 

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

 
       switch (t)
        {
 
 
       switch (t)
        {
 

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

          break;
 
          break;
 

-       case IDENTIFIER:
+       case tok_identifier:

          if (symval->type_name == NULL)
            symval->type_name = name;
          if (symval->type_name == NULL)
            symval->type_name = name;

-         else if (strcmp(name, symval->type_name) != 0)
-           warns(_("type redeclaration for %s"), symval->tag);
+         else if (strcmp (name, symval->type_name) != 0)
+           complain (_("type redeclaration for %s"), symval->tag);

 
          break;
 
        default:
 
          break;
 
        default:

-         warns(_("invalid %%type declaration due to item: `%s'"), token_buffer);
-         skip_to_char('%');
+         complain (_("invalid %%type declaration due to item: %s"),
+                   token_buffer);
+         skip_to_char ('%');

        }
     }
 }
 
 
 
        }
     }
 }
 
 
 

-/* read in a %left, %right or %nonassoc declaration and record its information.  */
-/* assoc is either LEFT_ASSOC, RIGHT_ASSOC or NON_ASSOC.  */
+/*----------------------------------------------------------------.
+| Read in a %left, %right or %nonassoc declaration and record its |
+| information.                                                    |
+`----------------------------------------------------------------*/

 
 

-void
-parse_assoc_decl (int assoc)
+static void
+parse_assoc_decl (associativity assoc)

 {
 {

-  register int k;
-  register char *name = NULL;
-  register int prev = 0;
+  char *name = NULL;
+  int prev = 0;

 
 

-  lastprec++;  /* Assign a new precedence level, never 0.  */
+  lastprec++;                  /* Assign a new precedence level, never 0.  */

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

-      register int t;
+      token_t t;

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

-       fatals ("Premature EOF after %s", token_buffer);
+       fatal (_("Premature EOF after %s"), token_buffer);

 
 

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

 
       switch (t)
        {
 
       switch (t)
        {

-
-       case TYPENAME:
-         k = strlen(token_buffer);
-         name = NEW2(k + 1, char);
-         strcpy(name, token_buffer);
+       case tok_typename:
+         name = xstrdup (token_buffer);

          break;
 
          break;
 

-       case COMMA:
+       case tok_comma:

          break;
 
          break;
 

-       case IDENTIFIER:
+       case tok_identifier:

          if (symval->prec != 0)
          if (symval->prec != 0)

-           warns(_("redefining precedence of %s"), symval->tag);
+           complain (_("redefining precedence of %s"), symval->tag);

          symval->prec = lastprec;
          symval->assoc = assoc;
          symval->prec = lastprec;
          symval->assoc = assoc;

-         if (symval->class == SNTERM)
-           warns(_("symbol %s redefined"), symval->tag);
-         symval->class = STOKEN;
+         if (symval->class == nterm_sym)
+           complain (_("symbol %s redefined"), symval->tag);
+         symval->class = token_sym;

          if (name)
          if (name)

-           { /* record the type, if one is specified */
+           {                   /* record the type, if one is specified */

              if (symval->type_name == NULL)
                symval->type_name = name;
              if (symval->type_name == NULL)
                symval->type_name = name;

-             else if (strcmp(name, symval->type_name) != 0)
-               warns(_("type redeclaration for %s"), symval->tag);
+             else if (strcmp (name, symval->type_name) != 0)
+               complain (_("type redeclaration for %s"), symval->tag);

            }
          break;
 
            }
          break;
 

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

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

-             translations = 1;
-            }
-          else
-            {
-             warns(_("invalid text (%s) - number should be after identifier"),
-                       token_buffer);
-             skip_to_char('%');
-            }
+           }
+         else
+           {
+             complain (_
+                       ("invalid text (%s) - number should be after identifier"),
+token_buffer);
+             skip_to_char ('%');
+           }

          break;
 
          break;
 

-       case SEMICOLON:
+       case tok_semicolon:

          return;
 
        default:
          return;
 
        default:

-         warns(_("unexpected item: %s"), token_buffer);
-         skip_to_char('%');
+         complain (_("unexpected item: %s"), token_buffer);
+         skip_to_char ('%');

        }
 
       prev = t;
        }
 
       prev = t;

-

     }
 }
 
 
 
     }
 }
 
 
 

-/* copy the union declaration into fattrs (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.     |
+`--------------------------------------------------------------*/

 
 

-void
+static void

 parse_union_decl (void)
 {
 parse_union_decl (void)
 {

-  register int c;
-  register int count;
-  register int in_comment;
-  int cplus_comment;
-
+  int c;
+  int count = 0;
+  bool done = FALSE;
+  struct obstack union_obstack;

   if (typed)
   if (typed)

-    warn(_("multiple %union declarations"));
+    complain (_("multiple %s declarations"), "%union");

 
   typed = 1;
 
 
   typed = 1;
 

-  if (!nolinesflag)
-    fprintf(fattrs, "\n#line %d \"%s\"\n", lineno, infile);
-  else
-    fprintf(fattrs, "\n");
-
-  fprintf(fattrs, "typedef union");
-  if (fdefines)
-    fprintf(fdefines, "typedef union");
+  obstack_init (&union_obstack);
+  obstack_sgrow (&union_obstack, "union");

 
 

-  count = 0;
-  in_comment = 0;
-
-  c = getc(finput);
-
-  while (c != EOF)
+  while (!done)

     {
     {

-      putc(c, fattrs);
-      if (fdefines)
-       putc(c, fdefines);
+      c = xgetc (finput);
+
+      /* If C contains '/', it is output by copy_comment ().  */
+      if (c != '/')
+       obstack_1grow (&union_obstack, c);

 
       switch (c)
        {
 
       switch (c)
        {


@@ -835,1192 +777,902 @@ parse_union_decl (void)
          break;
 
        case '/':
          break;
 
        case '/':

-         c = getc(finput);
-         if (c != '*' && c != '/')
-           ungetc(c, finput);
-         else
-           {
-             putc(c, fattrs);
-             if (fdefines)
-               putc(c, fdefines);
-             cplus_comment = (c == '/');
-             in_comment = 1;
-             c = getc(finput);
-             while (in_comment)
-               {
-                 putc(c, fattrs);
-                 if (fdefines)
-                   putc(c, fdefines);
-
-                 if (c == '\n')
-                   {
-                     lineno++;
-                     if (cplus_comment)
-                       {
-                         in_comment = 0;
-                         break;
-                       }
-                   }
-                 if (c == EOF)
-                   fatal(_("unterminated comment at end of file"));
-
-                 if (!cplus_comment && c == '*')
-                   {
-                     c = getc(finput);
-                     if (c == '/')
-                       {
-                         putc('/', fattrs);
-                         if (fdefines)
-                           putc('/', fdefines);
-                         in_comment = 0;
-                       }
-                   }
-                 else
-                   c = getc(finput);
-               }
-           }
+         copy_comment (finput, &union_obstack);

          break;
 
          break;
 

-

        case '{':
          count++;
          break;
 
        case '}':
        case '{':
          count++;
          break;
 
        case '}':

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

          if (count == 0)
          if (count == 0)

-           warn (_("unmatched close-brace (`}')"));
+           complain (_("unmatched %s"), "`}'");

          count--;
          count--;

-         if (count <= 0)
-           {
-             fprintf(fattrs, " YYSTYPE;\n");
-             if (fdefines)
-               fprintf(fdefines, " 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));

 }
 
 }
 

-/* parse the declaration %expect N which says to expect N
-   shift-reduce conflicts.  */

 
 

-void
+/*-------------------------------------------------------.
+| Parse the declaration %expect N which says to expect N |
+| shift-reduce conflicts.                                |
+`-------------------------------------------------------*/
+
+static void

 parse_expect_decl (void)
 {
 parse_expect_decl (void)
 {

-  register int c;
-  register int count;
-  char buffer[20];
-
-  c = getc(finput);
-  while (c == ' ' || c == '\t')
-    c = getc(finput);
-
-  count = 0;
-  while (c >= '0' && c <= '9')
-    {
-      if (count < 20)
-       buffer[count++] = c;
-      c = getc(finput);
-    }
-  buffer[count] = 0;
-
+  int c = skip_white_space ();

   ungetc (c, finput);
 
   ungetc (c, finput);
 

-  if (count <= 0 || count > 10)
-       warn(_("argument of %expect is not an integer"));
-  expected_conflicts = atoi (buffer);
+  if (!isdigit (c))
+    complain (_("argument of %%expect is not an integer"));
+  else
+    expected_conflicts = read_signed_integer (finput);

 }
 
 }
 

-/* that's all of parsing the declaration section */
-\f
-/* Get the data type (alternative in the union) of the value for symbol n in rule rule.  */

 
 

-char *
-get_type_name (int n, symbol_list *rule)
-{
-  static char *msg = N_("invalid $ value");
+/*-------------------------------------------------------------------.
+| Parse what comes after %thong.  the full syntax is                 |
+|                                                                    |
+|                %thong <type> token number literal                  |
+|                                                                    |
+| the <type> or number may be omitted.  The number specifies the     |
+| user_token_number.                                                 |
+|                                                                    |
+| Two symbols are entered in the table, one for the token symbol and |
+| one for the literal.  Both are given the <type>, if any, from the  |
+| declaration.  The ->user_token_number of the first is SALIAS and   |
+| the ->user_token_number of the second is set to the number, if     |
+| any, from the declaration.  The two symbols are linked via         |
+| pointers in their ->alias fields.                                  |
+|                                                                    |
+| During OUTPUT_DEFINES_TABLE, the symbol is reported thereafter,    |
+| only the literal string is retained it is the literal string that  |
+| is output to yytname                                               |
+`-------------------------------------------------------------------*/

 
 

-  register int i;
-  register symbol_list *rp;
+static void
+parse_thong_decl (void)
+{
+  token_t token;
+  struct bucket *symbol;
+  char *typename = 0;
+  int usrtoknum = SUNDEF;

 
 

-  if (n < 0)
+  token = lex ();              /* fetch typename or first token */
+  if (token == tok_typename)

     {
     {

-      warn(_(msg));
-      return NULL;
+      typename = xstrdup (token_buffer);
+      value_components_used = 1;
+      token = lex ();          /* fetch first token */

     }
 
     }
 

-  rp = rule;
-  i = 0;
+  /* process first token */

 
 

-  while (i < n)
+  if (token != tok_identifier)

     {
     {

-      rp = rp->next;
-      if (rp == NULL || rp->sym == NULL)
-       {
-         warn(_(msg));
-         return NULL;
-       }
-      i++;
+      complain (_("unrecognized item %s, expected an identifier"),
+               token_buffer);
+      skip_to_char ('%');
+      return;

     }
     }

+  symval->class = token_sym;
+  symval->type_name = typename;
+  symval->user_token_number = SALIAS;
+  symbol = symval;

 
 

-  return (rp->sym->type_name);
-}
-
-
-/* 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.  */
-
-void
-copy_guard (symbol_list *rule, int stack_offset)
-{
-  register int c;
-  register int n;
-  register int count;
-  register int match;
-  register int ended;
-  register char *type_name;
-  int brace_flag = 0;
-  int cplus_comment;
-
-  /* offset is always 0 if parser has already popped the stack pointer */
-  if (semantic_parser) stack_offset = 0;
-
-  fprintf(fguard, "\ncase %d:\n", nrules);
-  if (!nolinesflag)
-    fprintf(fguard, "#line %d \"%s\"\n", lineno, infile);
-  putc('{', fguard);
-
-  count = 0;
-  c = getc(finput);
+  token = lex ();              /* get number or literal string */

 
 

-  while (brace_flag ? (count > 0) : (c != ';'))
+  if (token == tok_number)

     {
     {

-      switch (c)
-       {
-       case '\n':
-         putc(c, fguard);
-         lineno++;
-         break;
-
-       case '{':
-         putc(c, fguard);
-         brace_flag = 1;
-         count++;
-         break;
-
-       case '}':
-         putc(c, fguard);
-         if (count > 0)
-           count--;
-         else
-           {
-             warn(_("unmatched right brace (`}')"));
-             c = getc(finput); /* skip it */
-           }
-          break;
-
-       case '\'':
-       case '"':
-         match = c;
-         putc(c, fguard);
-         c = getc(finput);
-
-         while (c != match)
-           {
-             if (c == EOF)
-               fatal(_("unterminated string at end of file"));
-             if (c == '\n')
-               {
-                 warn(_("unterminated string"));
-                 ungetc(c, finput);
-                 c = match;            /* invent terminator */
-                 continue;
-               }
-
-             putc(c, fguard);
-
-             if (c == '\\')
-               {
-                 c = getc(finput);
-                 if (c == EOF)
-                   fatal(_("unterminated string"));
-                 putc(c, fguard);
-                 if (c == '\n')
-                   lineno++;
-               }
-
-             c = getc(finput);
-           }
-
-         putc(c, fguard);
-         break;
-
-       case '/':
-         putc(c, fguard);
-         c = getc(finput);
-         if (c != '*' && c != '/')
-           continue;
-
-         cplus_comment = (c == '/');
-         putc(c, fguard);
-         c = getc(finput);
-
-         ended = 0;
-         while (!ended)
-           {
-             if (!cplus_comment && c == '*')
-               {
-                 while (c == '*')
-                   {
-                     putc(c, fguard);
-                     c = getc(finput);
-                   }
-
-                 if (c == '/')
-                   {
-                     putc(c, fguard);
-                     ended = 1;
-                   }
-               }
-             else if (c == '\n')
-               {
-                 lineno++;
-                 putc(c, fguard);
-                 if (cplus_comment)
-                   ended = 1;
-                 else
-                   c = getc(finput);
-               }
-             else if (c == EOF)
-               fatal(_("unterminated comment"));
-             else
-               {
-                 putc(c, fguard);
-                 c = getc(finput);
-               }
-           }
+      usrtoknum = numval;
+      token = lex ();          /* okay, did number, now get literal */
+    }

 
 

-         break;
+  /* process literal string token */

 
 

-       case '$':
-         c = getc(finput);
-         type_name = NULL;
+  if (token != tok_identifier || *symval->tag != '\"')
+    {
+      complain (_("expected string constant instead of %s"), token_buffer);
+      skip_to_char ('%');
+      return;
+    }
+  symval->class = token_sym;
+  symval->type_name = typename;
+  symval->user_token_number = usrtoknum;

 
 

-         if (c == '<')
-           {
-             register char *cp = token_buffer;
+  symval->alias = symbol;
+  symbol->alias = symval;

 
 

-             while ((c = getc(finput)) != '>' && c > 0)
-               {
-                 if (cp == token_buffer + maxtoken)
-                   cp = grow_token_buffer(cp);
+  /* symbol and symval combined are only one symbol.  */
+  nsyms--;
+}

 
 

-                 *cp++ = c;
-               }
-             *cp = 0;
-             type_name = token_buffer;

 
 

-             c = getc(finput);
-           }
+static void
+parse_muscle_decl (void)
+{
+  int ch = ungetc (skip_white_space (), finput);
+  char *muscle_key;
+  char *muscle_value;

 
 

-         if (c == '$')
-           {
-             fprintf(fguard, "yyval");
-             if (!type_name) type_name = rule->sym->type_name;
-             if (type_name)
-               fprintf(fguard, ".%s", type_name);
-             if(!type_name && typed)
-               warns(_("$$ of `%s' has no declared type"), rule->sym->tag);
-           }
+  /* 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);

 
 

-         else if (isdigit(c) || c == '-')
-           {
-             ungetc (c, finput);
-             n = read_signed_integer(finput);
-             c = getc(finput);
-
-             if (!type_name && n > 0)
-               type_name = get_type_name(n, rule);
-
-             fprintf(fguard, "yyvsp[%d]", n - stack_offset);
-             if (type_name)
-               fprintf(fguard, ".%s", type_name);
-             if(!type_name && typed)
-               warnss(_("$%s of `%s' has no declared type"), int_to_string(n), rule->sym->tag);
-             continue;
-           }
-         else
-           warns(_("$%s is invalid"), printable_version(c));
+  /* 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);

 
 

-         break;
+  /* Store the (key, value) pair in the environment. */
+  muscle_insert (muscle_key, muscle_value);
+}

 
 

-       case '@':
-         c = getc(finput);
-         if (isdigit(c) || c == '-')
-           {
-             ungetc (c, finput);
-             n = read_signed_integer(finput);
-             c = getc(finput);
-           }
-         else
-           {
-             warns(_("@%s is invalid"), printable_version(c));
-             n = 1;
-           }

 
 

-         fprintf(fguard, "yylsp[%d]", n - stack_offset);
-         yylsp_needed = 1;

 
 

-         continue;
+/*---------------------------------.
+| Parse a double quoted parameter. |
+`---------------------------------*/

 
 

-       case EOF:
-         fatal(_("unterminated %%guard clause"));
+static const char *
+parse_dquoted_param (const char *from)
+{
+  struct obstack param_obstack;
+  const char *param = NULL;
+  int c;

 
 

-       default:
-         putc(c, fguard);
-       }
+  obstack_init (&param_obstack);
+  c = skip_white_space ();

 
 

-      if (c != '}' || count != 0)
-       c = getc(finput);
+  if (c != '"')
+    {
+      complain (_("invalid %s declaration"), from);
+      ungetc (c, finput);
+      skip_to_char ('%');
+      return NULL;

     }
 
     }
 

-  c = skip_white_space();
+  while ((c = literalchar ()) != '"')
+    obstack_1grow (&param_obstack, c);

 
 

-  fprintf(fguard, ";\n    break;}");
-  if (c == '{')
-    copy_action(rule, stack_offset);
-  else if (c == '=')
+  obstack_1grow (&param_obstack, '\0');
+  param = obstack_finish (&param_obstack);
+
+  if (c != '"' || strlen (param) == 0)

     {
     {

-      c = getc(finput);        /* why not skip_white_space -wjh */
-      if (c == '{')
-       copy_action(rule, stack_offset);
+      complain (_("invalid %s declaration"), from);
+      if (c != '"')
+       ungetc (c, finput);
+      skip_to_char ('%');
+      return NULL;

     }
     }

-  else
-    ungetc(c, finput);
-}
-

 
 

+  return param;
+}

 
 

-/* Assuming that a { has just been seen, copy everything up to the 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.  */
+/*----------------------------------.
+| Parse what comes after %skeleton. |
+`----------------------------------*/

 
 

-void
-copy_action (symbol_list *rule, int stack_offset)
+static void
+parse_skel_decl (void)

 {
 {

-  register int c;
-  register int n;
-  register int count;
-  register int match;
-  register int ended;
-  register char *type_name;
-  int cplus_comment;
+  skeleton = parse_dquoted_param ("%skeleton");
+}

 
 

-  /* offset is always 0 if parser has already popped the stack pointer */
-  if (semantic_parser) stack_offset = 0;
+/*----------------------------------------------------------------.
+| Read from finput until `%%' is seen.  Discard the `%%'.  Handle |
+| any `%' declarations, and copy the contents of any `%{ ... %}'  |
+| groups to ATTRS_OBSTACK.                                        |
+`----------------------------------------------------------------*/

 
 

-  fprintf(faction, "\ncase %d:\n", nrules);
-  if (!nolinesflag)
-    fprintf(faction, "#line %d \"%s\"\n", lineno, infile);
-  putc('{', faction);
+static void
+read_declarations (void)
+{
+  for (;;)
+    {
+      int c = skip_white_space ();

 
 

-  count = 1;
-  c = getc(finput);
+      if (c == '%')
+       {
+         token_t tok = parse_percent_token ();

 
 

-  while (count > 0)
-    {
-      while (c != '}')
-        {
-          switch (c)
+         switch (tok)

            {
            {

-           case '\n':
-             putc(c, faction);
-             lineno++;
-             break;
+           case tok_two_percents:
+             return;

 
 

-           case '{':
-             putc(c, faction);
-             count++;
+           case tok_percent_left_curly:
+             copy_definition ();

              break;
 
              break;
 

-           case '\'':
-           case '"':
-             match = c;
-             putc(c, faction);
-             c = getc(finput);
-
-             while (c != match)
-               {
-                 if (c == '\n')
-                   {
-                     warn(_("unterminated string"));
-                     ungetc(c, finput);
-                     c = match;
-                     continue;
-                   }
-                 else if (c == EOF)
-                   fatal(_("unterminated string at end of file"));
-
-                 putc(c, faction);
-
-                 if (c == '\\')
-                   {
-                     c = getc(finput);
-                     if (c == EOF)
-                       fatal(_("unterminated string"));
-                     putc(c, faction);
-                     if (c == '\n')
-                       lineno++;
-                   }
-
-                 c = getc(finput);
-               }
-
-             putc(c, faction);
+           case tok_token:
+             parse_token_decl (token_sym, nterm_sym);

              break;
 
              break;
 

-           case '/':
-             putc(c, faction);
-             c = getc(finput);
-             if (c != '*' && c != '/')
-               continue;
-
-             cplus_comment = (c == '/');
-             putc(c, faction);
-             c = getc(finput);
+           case tok_nterm:
+             parse_token_decl (nterm_sym, token_sym);
+             break;

 
 

-             ended = 0;
-             while (!ended)
-               {
-                 if (!cplus_comment && c == '*')
-                   {
-                     while (c == '*')
-                       {
-                         putc(c, faction);
-                         c = getc(finput);
-                       }
-
-                     if (c == '/')
-                       {
-                         putc(c, faction);
-                         ended = 1;
-                       }
-                   }
-                 else if (c == '\n')
-                   {
-                     lineno++;
-                     putc(c, faction);
-                     if (cplus_comment)
-                       ended = 1;
-                     else
-                       c = getc(finput);
-                   }
-                 else if (c == EOF)
-                   fatal(_("unterminated comment"));
-                 else
-                   {
-                     putc(c, faction);
-                     c = getc(finput);
-                   }
-               }
+           case tok_type:
+             parse_type_decl ();
+             break;

 
 

+           case tok_start:
+             parse_start_decl ();

              break;
 
              break;
 

-           case '$':
-             c = getc(finput);
-             type_name = NULL;
+           case tok_union:
+             parse_union_decl ();
+             break;

 
 

-             if (c == '<')
-               {
-                 register char *cp = token_buffer;
+           case tok_expect:
+             parse_expect_decl ();
+             break;

 
 

-                 while ((c = getc(finput)) != '>' && c > 0)
-                   {
-                     if (cp == token_buffer + maxtoken)
-                       cp = grow_token_buffer(cp);
+           case tok_thong:
+             parse_thong_decl ();
+             break;

 
 

-                     *cp++ = c;
-                   }
-                 *cp = 0;
-                 type_name = token_buffer;
-                 value_components_used = 1;
+           case tok_left:
+             parse_assoc_decl (left_assoc);
+             break;

 
 

-                 c = getc(finput);
-               }
-             if (c == '$')
-               {
-                 fprintf(faction, "yyval");
-                 if (!type_name) type_name = get_type_name(0, rule);
-                 if (type_name)
-                   fprintf(faction, ".%s", type_name);
-                 if(!type_name && typed)
-                   warns(_("$$ of `%s' has no declared type"), rule->sym->tag);
-               }
-             else if (isdigit(c) || c == '-')
-               {
-                 ungetc (c, finput);
-                 n = read_signed_integer(finput);
-                 c = getc(finput);
-
-                 if (!type_name && n > 0)
-                   type_name = get_type_name(n, rule);
-
-                 fprintf(faction, "yyvsp[%d]", n - stack_offset);
-                 if (type_name)
-                   fprintf(faction, ".%s", type_name);
-                 if(!type_name && typed)
-                   warnss(_("$%s of `%s' has no declared type"),
-                               int_to_string(n), rule->sym->tag);
-                 continue;
-               }
-             else
-               warns(_("$%s is invalid"), printable_version(c));
+           case tok_right:
+             parse_assoc_decl (right_assoc);
+             break;

 
 

+           case tok_nonassoc:
+             parse_assoc_decl (non_assoc);

              break;
 
              break;
 

-           case '@':
-             c = getc(finput);
-             if (isdigit(c) || c == '-')
-               {
-                 ungetc (c, finput);
-                 n = read_signed_integer(finput);
-                 c = getc(finput);
-               }
-             else
-               {
-                 warn(_("invalid @-construct"));
-                 n = 1;
-               }
+           case tok_define:
+             parse_muscle_decl ();
+             break;

 
 

-             fprintf(faction, "yylsp[%d]", n - stack_offset);
-             yylsp_needed = 1;
+           case tok_skel:
+             parse_skel_decl ();
+             break;

 
 

-             continue;
+           case tok_noop:
+             break;

 
 

-           case EOF:
-             fatal(_("unmatched `{'"));
+           case tok_stropt:
+           case tok_intopt:
+           case tok_obsolete:
+             abort ();
+             break;

 
 

+           case tok_illegal:

            default:
            default:

-             putc(c, faction);
+             complain (_("unrecognized: %s"), token_buffer);
+             skip_to_char ('%');

            }
            }

+       }
+      else if (c == EOF)
+       fatal (_("no input grammar"));
+      else
+       {
+         char buf[] = "c";
+         buf[0] = c;
+         complain (_("unknown character: %s"), quote (buf));
+         skip_to_char ('%');
+       }
+    }
+}
+\f
+/*-------------------------------------------------------------------.
+| Assuming that a `{' has just been seen, copy everything up to the  |
+| 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.                 |
+`-------------------------------------------------------------------*/

 
 

-          c = getc(finput);
-        }
+static void
+parse_braces (symbol_list *rule, int stack_offset)
+{
+  int c;
+  int count;

 
 

-      /* above loop exits when c is '}' */
+  count = 1;
+  while (count > 0)
+    {
+      while ((c = getc (finput)) != '}')
+       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;
+
+         case '/':
+           copy_comment (finput, &action_obstack);
+           break;
+
+         case '$':
+           copy_dollar (finput, &action_obstack,
+                        rule, stack_offset);
+           break;
+
+         case '@':
+           copy_at (finput, &action_obstack,
+                    stack_offset);
+           break;
+
+         case EOF:
+           fatal (_("unmatched %s"), "`{'");
+
+         default:
+           obstack_1grow (&action_obstack, c);
+         }

 
 

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

       if (--count)
       if (--count)

-        {
-         putc(c, faction);
-         c = getc(finput);
-       }
+       obstack_1grow (&action_obstack, c);

     }
 
     }
 

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

 }
 
 
 }
 
 

-
-/* generate a dummy symbol, a nonterminal,
-whose name cannot conflict with the user's names. */
-
-bucket *
-gensym (void)
+static void
+parse_action (symbol_list *rule, int stack_offset)

 {
 {

-  register bucket *sym;
-
-  sprintf (token_buffer, "@%d", ++gensym_count);
-  sym = getsym(token_buffer);
-  sym->class = SNTERM;
-  sym->value = nvars++;
-  return (sym);
+  rule->action_line = lineno;
+  parse_braces (rule, stack_offset);
+  rule->action = obstack_finish (&action_obstack);

 }
 
 }
 

-/* 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.  */
-
-void
-readgram (void)
+static void
+parse_guard (symbol_list *rule, int stack_offset)

 {
 {

-  register int t;
-  register bucket *lhs;
-  register symbol_list *p;
-  register symbol_list *p1;
-  register bucket *bp;
+  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);
+}

 
 

-  symbol_list *crule;  /* points to first symbol_list of current rule.  */
-                       /* its symbol is the lhs of the rule.   */
-  symbol_list *crule1;  /* points to the symbol_list preceding crule.  */
+\f

 
 

-  p1 = NULL;
+/*-------------------------------------------------------------------.
+| Generate a dummy symbol, a nonterminal, whose name cannot conflict |
+| with the user's names.                                             |
+`-------------------------------------------------------------------*/

 
 

-  t = lex();
+static bucket *
+gensym (void)
+{
+  /* Incremented for each generated symbol */
+  static int gensym_count = 0;
+  static char buf[256];

 
 

-  while (t != TWO_PERCENTS && t != ENDFILE)
-    {
-      if (t == IDENTIFIER || t == BAR)
-       {
-         register int actionflag = 0;
-         int rulelength = 0;  /* number of symbols in rhs of this rule so far  */
-         int xactions = 0;     /* JF for error checking */
-         bucket *first_rhs = 0;
+  bucket *sym;

 
 

-         if (t == IDENTIFIER)
-           {
-             lhs = symval;
+  sprintf (buf, "@%d", ++gensym_count);
+  token_buffer = buf;
+  sym = getsym (token_buffer);
+  sym->class = nterm_sym;
+  sym->value = nvars++;
+  return sym;
+}
+\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.                         |
+|                                                                    |
+| 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.                                              |
+`-------------------------------------------------------------------*/

 
 

-             if (!start_flag)
-               {
-                 startval = lhs;
-                 start_flag = 1;
-               }
+static void
+readgram (void)
+{
+  token_t t;
+  bucket *lhs = NULL;
+  symbol_list *p = NULL;
+  symbol_list *p1 = NULL;
+  bucket *bp;

 
 

-             t = lex();
-             if (t != COLON)
-               {
-                 warn(_("ill-formed rule: initial symbol not followed by colon"));
-                 unlex(t);
-               }
-           }
+  /* Points to first symbol_list of current rule. its symbol is the
+     lhs of the rule.  */
+  symbol_list *crule = NULL;
+  /* Points to the symbol_list preceding crule.  */
+  symbol_list *crule1 = NULL;

 
 

-         if (nrules == 0 && t == BAR)
-           {
-             warn(_("grammar starts with vertical bar"));
-             lhs = symval;     /* BOGUS: use a random symval */
-           }
-         /* start a new rule and record its lhs.  */
+  t = lex ();

 
 

-         nrules++;
-         nitems++;
-
-         record_rule_line ();
+  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;

 
 

-         p = NEW(symbol_list);
-         p->sym = lhs;
+       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);
+             }
+         }

 
 

-         crule1 = p1;
-         if (p1)
-           p1->next = p;
-         else
-           grammar = p;
+       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.  */

 
 

-         p1 = p;
-         crule = p;
+       nrules++;
+       nitems++;

 
 

-         /* mark the rule's lhs as a nonterminal if not already so.  */
+       p = symbol_list_new (lhs);

 
 

-         if (lhs->class == SUNKNOWN)
-           {
-             lhs->class = SNTERM;
-             lhs->value = nvars;
-             nvars++;
-           }
-         else if (lhs->class == STOKEN)
-           warns(_("rule given for %s, which is a token"), lhs->tag);
+       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 == PREC)
-               {
-                 t = lex();
-                 crule->ruleprec = symval;
-                 t = lex();
-               }
+       /* mark the rule's lhs as a nonterminal if not already so.  */

 
 

-             if (! (t == IDENTIFIER || t == 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 == IDENTIFIER)
-               {
-                 register bucket *ssave;
-                 register int t1;
-
-                 ssave = symval;
-                 t1 = lex();
-                 unlex(t1);
-                 symval = ssave;
-                 if (t1 == 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 (actionflag)
-               {
-                 register 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 = NEW(symbol_list);
-                 if (crule1)
-                   crule1->next = p;
-                 else grammar = p;
-                 p->sym = sdummy;
-                 crule1 = NEW(symbol_list);
-                 p->next = crule1;
-                 crule1->next = crule;
-
-                 /* insert the dummy generated by that rule into this rule.  */
-                 nitems++;
-                 p = NEW(symbol_list);
-                 p->sym = sdummy;
-                 p1->next = p;
-                 p1 = p;
-
-                 actionflag = 0;
-               }
+       for (;;)
+         {
+           t = lex ();
+           if (t == tok_prec)
+             {
+               t = lex ();
+               crule->ruleprec = symval;
+               t = lex ();
+             }
+
+           if (!(t == tok_identifier || t == tok_left_curly))
+             break;

 
 

-             if (t == IDENTIFIER)
-               {
-                 nitems++;
-                 p = NEW(symbol_list);
-                 p->sym = symval;
-                 p1->next = p;
-                 p1 = p;
-               }
-             else /* handle an action.  */
-               {
-                 copy_action(crule, rulelength);
-                 actionflag = 1;
-                 xactions++;   /* JF */
-               }
-             rulelength++;
-           }   /* end of  read rhs of rule */
+           /* 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;
+               /* Move the action from the host rule to this one. */
+               p->action = crule->action;
+               p->action_line = crule->action_line;
+               crule->action = NULL;
+
+               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 ();
+         }

 
 

-         /* Put an empty link in the list to mark the end of this rule  */
-         p = NEW(symbol_list);
-         p1->next = p;
-         p1 = p;
+       if (t == tok_guard)
+         {
+           if (!semantic_parser)
+             complain (_("%%guard present but %%semantic_parser not specified"));

 
 

-         if (t == PREC)
-           {
-             warn(_("two @prec's in a row"));
-             t = lex();
-             crule->ruleprec = symval;
-             t = lex();
-           }
-         if (t == GUARD)
-           {
-             if (! semantic_parser)
-               warn(_("%%guard present but %%semantic_parser not specified"));
+           parse_guard (crule, rulelength);
+           t = lex ();
+         }

 
 

-             copy_guard(crule, rulelength);
-             t = lex();
-           }
-         else if (t == LEFT_CURLY)
-           {
-               /* This case never occurs -wjh */
-             if (actionflag)  warn(_("two actions at end of one rule"));
-             copy_action(crule, rulelength);
-             actionflag = 1;
-             xactions++;       /* -wjh */
-             t = lex();
-           }
-         /* If $$ is being set in default way,
-            warn if any type mismatch.  */
-         else if (!xactions && first_rhs && lhs->type_name != first_rhs->type_name)
-           {
-             if (lhs->type_name == 0 || first_rhs->type_name == 0
-                 || strcmp(lhs->type_name,first_rhs->type_name))
-               warnss(_("type clash (`%s' `%s') on default action"),
+       if (t == tok_left_curly)
+         {
+           /* This case never occurs -wjh */
+           if (action_flag)
+             complain (_("two actions at end of one rule"));
+           parse_action (crule, rulelength);
+           action_flag = 1;
+           xactions++; /* -wjh */
+           t = lex ();
+         }
+       /* If $$ 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 : "");
                        lhs->type_name ? lhs->type_name : "",
                        first_rhs->type_name ? first_rhs->type_name : "");

-           }
-         /* Warn if there is no default for $$ but we need one.  */
-         else if (!xactions && !first_rhs && lhs->type_name != 0)
-           warn(_("empty rule for typed nonterminal, and no action"));
-         if (t == SEMICOLON)
-           t = lex();
-       }
-#if 0
-  /* these things can appear as alternatives to rules.  */
-/* NO, they cannot.
-       a) none of the documentation allows them
-       b) most of them scan forward until finding a next %
-               thus they may swallow lots of intervening rules
-*/
-      else if (t == TOKEN)
-       {
-         parse_token_decl(STOKEN, SNTERM);
-         t = lex();
-       }
-      else if (t == NTERM)
-       {
-         parse_token_decl(SNTERM, STOKEN);
-         t = lex();
-       }
-      else if (t == TYPE)
-       {
-         t = get_type();
-       }
-      else if (t == UNION)
-       {
-         parse_union_decl();
-         t = lex();
-       }
-      else if (t == EXPECT)
-       {
-         parse_expect_decl();
-         t = lex();
-       }
-      else if (t == START)
-       {
-         parse_start_decl();
-         t = lex();
-       }
-#endif
-
-      else
-       {
-         warns(_("invalid input: %s"), token_buffer);
-         t = lex();
-       }
-    }
+         }
+       /* Warn if there is no default for $$ 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 */
 
 
   /* grammar has been read.  Do some checking */
 

-  if (nsyms > MAXSHORT)
-    fatals(_("too many symbols (tokens plus nonterminals); maximum %s"),
-          int_to_string(MAXSHORT));

   if (nrules == 0)
   if (nrules == 0)

-    fatal(_("no rules in the input grammar"));
-
-  if (typed == 0       /* JF put out same default YYSTYPE as YACC does */
-      && !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.  */
-      fprintf(fattrs, "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
-      if (fdefines)
-       fprintf(fdefines, "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
-    }
+    fatal (_("no rules in the input grammar"));

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

-    if (bp->class == SUNKNOWN)
+    if (bp->class == unknown_sym)

       {
       {

-       warns(_("symbol %s is used, but is not defined as a token and has no rules"),
-                       bp->tag);
-       bp->class = SNTERM;
+       complain (_
+                 ("symbol %s is used, but is not defined as a token and has no rules"),
+                 bp->tag);
+       bp->class = nterm_sym;

        bp->value = nvars++;
       }
 
        bp->value = nvars++;
       }
 

-  ntokens = nsyms - 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;

 
 

-void
-record_rule_line (void)
-{
-  /* Record each rule's source line number in rline table.  */
+  if (nsyms > MAXSHORT)
+    fatal (_("too many symbols (tokens plus nonterminals); maximum %d"),
+          MAXSHORT);

 
 

-  if (nrules >= rline_allocated)
-    {
-      rline_allocated = nrules * 2;
-      rline = (short *) xrealloc ((char *) rline,
-                                 rline_allocated * sizeof (short));
-    }
-  rline[nrules] = lineno;
+  ntokens = nsyms - nvars;

 }
 
 }
 

-
-/* 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)
+/* At the end of the grammar file, some C source code must
+   be stored. It is going to be associated to the epilogue
+   directive.  */
+static void
+read_additionnal_code (void)

 {
 {

-  register int k;
-  register int t;
-  register char *name;
+  char c;
+  struct obstack el_obstack;

 
 

-  t = lex();
+  obstack_init (&el_obstack);

 
 

-  if (t != TYPENAME)
+  if (!no_lines_flag)

     {
     {

-      warn(_("ill-formed %type declaration"));
-      return t;
+      obstack_fgrow2 (&el_obstack, muscle_find ("linef"),
+                     lineno, quotearg_style (c_quoting_style,
+                                             muscle_find ("filename")));

     }
 
     }
 

-  k = strlen(token_buffer);
-  name = NEW2(k + 1, char);
-  strcpy(name, token_buffer);
+  while ((c = getc (finput)) != EOF)
+    obstack_1grow (&el_obstack, c);

 
 

-  for (;;)
-    {
-      t = lex();
+  obstack_1grow (&el_obstack, 0);
+  muscle_insert ("epilogue", obstack_finish (&el_obstack));
+}

 
 

-      switch (t)
-       {
-       case SEMICOLON:
-         return (lex());
+\f
+/*------------------------------------------------------------------.
+| Set TOKEN_TRANSLATIONS.  Check that no two symbols share the same |
+| number.                                                           |
+`------------------------------------------------------------------*/

 
 

-       case COMMA:
-         break;
+static void
+token_translations_init (void)
+{
+  bucket *bp = NULL;
+  int i;

 
 

-       case IDENTIFIER:
-         if (symval->type_name == NULL)
-           symval->type_name = name;
-         else if (strcmp(name, symval->type_name) != 0)
-           warns(_("type redeclaration for %s"), symval->tag);
+  token_translations = XCALLOC (short, max_user_token_number + 1);

 
 

-         break;
+  /* 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;

 
 

-       default:
-         return (t);
-       }
+  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"),
+                 symbols[token_translations[bp->user_token_number]]->tag,
+                 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 SYMBOL_TABLE, TAGS of symbols.        |
+`----------------------------------------------------------------*/

 
 

-/* assign symbol numbers, and write definition of token names into fdefines.
-Set up vectors tags and sprec of names and precedences of symbols.  */
-
-void
+static void

 packsymbols (void)
 {
 packsymbols (void)
 {

-  register bucket *bp;
-  register int tokno = 1;
-  register int i;
-  register int last_user_token_number;
-
-  /* int lossage = 0; JF set but not used */
+  bucket *bp = NULL;
+  int tokno = 1;
+  int last_user_token_number;

 
 

-  tags = NEW2(nsyms + 1, char *);
-  tags[0] = "$";
-  user_toknums = NEW2(nsyms + 1, int);
-  user_toknums[0] = 0;
-
-  sprec = NEW2(nsyms, short);
-  sassoc = NEW2(nsyms, short);
+  symbols = XCALLOC (bucket *, nsyms);

 
   max_user_token_number = 256;
   last_user_token_number = 256;
 
   for (bp = firstsymbol; bp; bp = bp->next)
     {
 
   max_user_token_number = 256;
   last_user_token_number = 256;
 
   for (bp = firstsymbol; bp; bp = bp->next)
     {

-      if (bp->class == SNTERM)
+      if (bp->class == nterm_sym)

        {
          bp->value += ntokens;
        }
       else if (bp->alias)
        {
        {
          bp->value += ntokens;
        }
       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++;
-
-               if (bp->prec != bp->alias->prec) {
-                       if (bp->prec != 0 && bp->alias->prec != 0
-                                       && bp->user_token_number == SALIAS)
-                               warnss(_("conflicting precedences for %s and %s"),
-                                       bp->tag, bp->alias->tag);
-                       if (bp->prec != 0) bp->alias->prec = bp->prec;
-                       else bp->prec = bp->alias->prec;
+         /* 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->assoc != bp->alias->assoc) {
-                       if (bp->assoc != 0 && bp->alias->assoc != 0
-                                       && bp->user_token_number == SALIAS)
-                               warnss(_("conflicting assoc values for %s and %s"),
-                                       bp->tag, bp->alias->tag);
-                       if (bp->assoc != 0) bp->alias->assoc = bp->assoc;
-                       else bp->assoc = bp->alias->assoc;
-               }
+         if (bp->prec != bp->alias->prec)
+           {
+             if (bp->prec != 0 && bp->alias->prec != 0
+                 && bp->user_token_number == SALIAS)
+               complain (_("conflicting precedences for %s and %s"),
+                         bp->tag, bp->alias->tag);
+             if (bp->prec != 0)
+               bp->alias->prec = bp->prec;
+             else
+               bp->prec = bp->alias->prec;
+           }

 
 

-               if (bp->user_token_number == SALIAS)
-                       continue;  /* do not do processing below for SALIASs */
+         if (bp->assoc != bp->alias->assoc)
+           {
+             if (bp->assoc != 0 && bp->alias->assoc != 0
+                 && bp->user_token_number == SALIAS)
+               complain (_("conflicting assoc values for %s and %s"),
+                         bp->tag, bp->alias->tag);
+             if (bp->assoc != 0)
+               bp->alias->assoc = bp->assoc;
+             else
+               bp->assoc = bp->alias->assoc;
+           }

 
 

-       }
-      else  /* bp->class == STOKEN */
+         /* Do not do processing below for SALIASs.  */
+         if (bp->user_token_number == SALIAS)
+           continue;
+
+       }
+      else /* bp->class == token_sym */

        {
        {

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

        }
 
        }
 

-      if (bp->class == STOKEN)
+      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;
        }
 

-      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;

     }
 
     }
 

-  if (translations)
-    {
-      register int i;
-
-      token_translations = NEW2(max_user_token_number+1, short);
-
-      /* 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)
-        {
-          if (bp->value >= ntokens) continue;            /* non-terminal */
-          if (bp->user_token_number == SALIAS) continue;
-          if (token_translations[bp->user_token_number] != 2)
-           warnsss(_("tokens %s and %s both assigned number %s"),
-                             tags[token_translations[bp->user_token_number]],
-                             bp->tag,
-                             int_to_string(bp->user_token_number));
-          token_translations[bp->user_token_number] = bp->value;
-        }
-    }
+  token_translations_init ();

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

-  if (! noparserflag)
-    output_token_defines(ftable);
-
-  if (startval->class == SUNKNOWN)
-    fatals(_("the start symbol %s is undefined"), startval->tag);
-  else if (startval->class == STOKEN)
-    fatals(_("the start symbol %s is a token"), startval->tag);
+  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;
 
   start_symbol = startval->value;

-
-  if (definesflag)
-    {
-      output_token_defines(fdefines);
-
-      if (!pure_parser)
-       {
-         if (spec_name_prefix)
-           fprintf(fdefines, "\nextern YYSTYPE %slval;\n", spec_name_prefix);
-         else
-           fprintf(fdefines, "\nextern YYSTYPE yylval;\n");
-       }
-
-      if (semantic_parser)
-       for (i = ntokens; i < nsyms; i++)
-         {
-           /* don't make these for dummy nonterminals made by gensym.  */
-           if (*tags[i] != '@')
-             fprintf(fdefines, "#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
-    }
-}
-
-/* For named tokens, but not literal ones, define the name.
-   The value is the user token number.
-*/
-void
-output_token_defines (FILE *file)
-{
-  bucket *bp;
-  register char *cp, *symbol;
-  register 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;
-
-      fprintf(file, "#define\t%s\t%d\n", symbol,
-               ((translations && ! rawtoknumflag)
-                       ? bp->user_token_number
-                       : bp->value));
-      if (semantic_parser)
-        fprintf(file, "#define\tT%s\t%d\n", symbol, bp->value);
-    }
-
-  putc('\n', file);

 }
 
 
 }
 
 

+/*---------------------------------------------------------------.
+| Convert the rules into the representation using RRHS, RLHS and |
+| RITEMS.                                                        |
+`---------------------------------------------------------------*/

 
 

-/* convert the rules into the representation using rrhs, rlhs and ritems.  */
-
-void
+static void

 packgram (void)
 {
 packgram (void)
 {

-  register int itemno;
-  register int ruleno;
-  register symbol_list *p;
-/*  register bucket *bp; JF unused */
+  int itemno;
+  int ruleno;
+  symbol_list *p;

 
 

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

 
 

-  ritem = NEW2(nitems + 1, short);
-  rlhs = NEW2(nrules, short) - 1;
-  rrhs = NEW2(nrules, short) - 1;
-  rprec = NEW2(nrules, short) - 1;
-  rprecsym = NEW2(nrules, short) - 1;
-  rassoc = NEW2(nrules, short) - 1;
+  ritem = XCALLOC (short, nitems + 1);
+  rules = XCALLOC (rule_t, nrules) - 1;

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


@@ -2028,9 +1680,15 @@ 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)


@@ -2038,54 +1696,128 @@ packgram (void)
          ritem[itemno++] = p->sym->value;
          /* A rule gets by default the precedence and associativity
             of the last token in it.  */
          ritem[itemno++] = p->sym->value;
          /* A rule gets by default the precedence and associativity
             of the last token in it.  */

-          if (p->sym->class == STOKEN)
+         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;

        }
 
       /* If this rule has a %prec,
        }
 
       /* If this rule has a %prec,

-        the specified symbol's precedence replaces the default.  */
+         the specified symbol's precedence replaces the default.  */

       if (ruleprec)
        {
       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;
       ruleno++;
 
        }
 
       ritem[itemno++] = -ruleno;
       ruleno++;
 

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

     }
 
   ritem[itemno] = 0;
     }
 
   ritem[itemno] = 0;

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

 }
 \f
 }
 \f

-/* Read a signed integer from STREAM and return its value.  */
+/*-------------------------------------------------------------------.
+| Read in the grammar specification and record it in the format      |
+| described in gram.h.  All guards are copied into the GUARD_OBSTACK |
+| and all actions into ACTION_OBSTACK, in each case forming the body |
+| of a C function (YYGUARD or YYACTION) which contains a switch      |
+| statement to decide which guard or action to execute.              |
+`-------------------------------------------------------------------*/

 
 

-int
-read_signed_integer (FILE *stream)
+void
+reader (void)

 {
 {

-  register int c = getc(stream);
-  register int sign = 1;
-  register int n;
+  start_flag = 0;
+  startval = NULL;             /* start symbol not specified yet. */

 
 

-  if (c == '-')
-    {
-      c = getc(stream);
-      sign = -1;
-    }
-  n = 0;
-  while (isdigit(c))
+  nsyms = 0;
+  nvars = 0;
+  nrules = 0;
+  nitems = 0;
+
+  typed = 0;
+  lastprec = 0;
+
+  semantic_parser = 0;
+  pure_parser = 0;
+
+  grammar = NULL;
+
+  lex_init ();
+  lineno = 1;
+
+  /* Initialize the muscle obstack.  */
+  obstack_init (&muscle_obstack);
+
+  /* Initialize the symbol table.  */
+  tabinit ();
+
+  /* Construct the axiom symbol. */
+  axiom = getsym ("$axiom");
+  axiom->class = nterm_sym;
+  axiom->value = nvars++;
+
+  /* Construct the error token */
+  errtoken = getsym ("error");
+  errtoken->class = token_sym;
+  errtoken->user_token_number = 256;   /* Value specified by POSIX.  */
+
+  /* Construct a token that represents all undefined literal tokens.
+     It is always token number 2.  */
+  undeftoken = getsym ("$undefined.");
+  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 ();
+
+  /* If the user did not define her EOFTOKEN, do it now. */
+  if (!eoftoken)

     {
     {

-      n = 10*n + (c - '0');
-      c = getc(stream);
+      eoftoken = getsym ("$");
+      eoftoken->class = token_sym;
+      /* Value specified by POSIX.  */
+      eoftoken->user_token_number = 0;

     }
 
     }
 

-  ungetc(c, stream);
+  /* 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 ();
+
+  lex_free ();
+  xfclose (finput);
+
+  /* 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 ();

 
 

-  return n * sign;
+  /* The grammar as a symbol_list is no longer needed. */
+  LIST_FREE (symbol_list, grammar);

 }
 }