* lex.c (real_yylex) : Change integer literal overflow handling to

[pf3gnuchains/gcc-fork.git] / gcc / cp / lex.c

/* Separate lexical analyzer for GNU C++.
   Copyright (C) 1987, 89, 92-98, 1999 Free Software Foundation, Inc.
   Hacked by Michael Tiemann (tiemann@cygnus.com)

This file is part of GNU CC.

GNU CC 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.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


/* This file is the lexical analyzer for GNU C++.  */

/* Cause the `yydebug' variable to be defined.  */
#define YYDEBUG 1

#include "config.h"
#include "system.h"
#include "input.h"
#include "tree.h"
#include "lex.h"
#include "cp-tree.h"
#include "parse.h"
#include "flags.h"
#include "obstack.h"
#include "c-pragma.h"
#include "toplev.h"
#include "output.h"

#ifdef MULTIBYTE_CHARS
#include "mbchar.h"
#include <locale.h>
#endif

#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free

#ifndef DIR_SEPARATOR
#define DIR_SEPARATOR '/'
#endif

extern struct obstack permanent_obstack;
extern struct obstack *current_obstack, *saveable_obstack;

extern void yyprint PROTO((FILE *, int, YYSTYPE));

static tree get_time_identifier PROTO((const char *));
static int check_newline PROTO((void));
static int skip_white_space PROTO((int));
static void finish_defarg PROTO((void));
static int my_get_run_time PROTO((void));
static int get_last_nonwhite_on_line PROTO((void));
static int interface_strcmp PROTO((const char *));
static int readescape PROTO((int *));
static char *extend_token_buffer PROTO((const char *));
static void consume_string PROTO((struct obstack *, int));
static int set_typedecl_interface_info PROTO((tree *, void *));
static void feed_defarg PROTO((tree, tree));
static int set_vardecl_interface_info PROTO((tree *, void *));
static void store_pending_inline PROTO((tree, struct pending_inline *));
static void reinit_parse_for_expr PROTO((struct obstack *));
static int *init_cpp_parse PROTO((void));
static int handle_cp_pragma PROTO((const char *));
#ifdef HANDLE_GENERIC_PRAGMAS
static int handle_generic_pragma PROTO((int));
#endif
#ifdef GATHER_STATISTICS
#ifdef REDUCE_LENGTH
static int reduce_cmp PROTO((int *, int *));
static int token_cmp PROTO((int *, int *));
#endif
#endif
static void begin_definition_of_inclass_inline PROTO((struct pending_inline*));
static void parse_float PROTO((PTR));
static int is_global PROTO((tree));
static void init_filename_times PROTO((void));

/* Given a file name X, return the nondirectory portion.
   Keep in mind that X can be computed more than once.  */
char *
file_name_nondirectory (x)
     const char *x;
{
  char *tmp = (char *) rindex (x, '/');
  if (DIR_SEPARATOR != '/' && ! tmp)
    tmp = (char *) rindex (x, DIR_SEPARATOR);
  if (tmp)
    return (char *) (tmp + 1);
  else
    return (char *) x;
}

/* This obstack is needed to hold text.  It is not safe to use
   TOKEN_BUFFER because `check_newline' calls `yylex'.  */
struct obstack inline_text_obstack;
char *inline_text_firstobj;

#if USE_CPPLIB
#include "cpplib.h"
extern cpp_reader  parse_in;
extern cpp_options parse_options;
extern unsigned char *yy_cur, *yy_lim;
#else
FILE *finput;
#endif
int end_of_file;

/* Pending language change.
   Positive is push count, negative is pop count.  */
int pending_lang_change = 0;

/* Wrap the current header file in extern "C".  */
static int c_header_level = 0;

extern int first_token;
extern struct obstack token_obstack;

/* ??? Don't really know where this goes yet.  */
#if 1
#include "input.c"
#else
extern void put_back (/* int */);
extern int input_redirected ();
extern void feed_input (/* char *, int */);
#endif

/* Holds translations from TREE_CODEs to operator name strings,
   i.e., opname_tab[PLUS_EXPR] == "+".  */
char **opname_tab;
char **assignop_tab;
\f
extern int yychar;              /*  the lookahead symbol                */
extern YYSTYPE yylval;          /*  the semantic value of the           */
                                /*  lookahead symbol                    */

#if 0
YYLTYPE yylloc;                 /*  location data for the lookahead     */
                                /*  symbol                              */
#endif


/* the declaration found for the last IDENTIFIER token read in.
   yylex must look this up to detect typedefs, which get token type TYPENAME,
   so it is left around in case the identifier is not a typedef but is
   used in a context which makes it a reference to a variable.  */
tree lastiddecl;

/* The elements of `ridpointers' are identifier nodes
   for the reserved type names and storage classes.
   It is indexed by a RID_... value.  */
tree ridpointers[(int) RID_MAX];

/* We may keep statistics about how long which files took to compile.  */
static int header_time, body_time;
static tree filename_times;
static tree this_filename_time;

/* Array for holding counts of the numbers of tokens seen.  */
extern int *token_count;
\f
/* Return something to represent absolute declarators containing a *.
   TARGET is the absolute declarator that the * contains.
   CV_QUALIFIERS is a list of modifiers such as const or volatile
   to apply to the pointer type, represented as identifiers.

   We return an INDIRECT_REF whose "contents" are TARGET
   and whose type is the modifier list.  */

tree
make_pointer_declarator (cv_qualifiers, target)
     tree cv_qualifiers, target;
{
  if (target && TREE_CODE (target) == IDENTIFIER_NODE
      && ANON_AGGRNAME_P (target))
    error ("type name expected before `*'");
  target = build_parse_node (INDIRECT_REF, target);
  TREE_TYPE (target) = cv_qualifiers;
  return target;
}

/* Return something to represent absolute declarators containing a &.
   TARGET is the absolute declarator that the & contains.
   CV_QUALIFIERS is a list of modifiers such as const or volatile
   to apply to the reference type, represented as identifiers.

   We return an ADDR_EXPR whose "contents" are TARGET
   and whose type is the modifier list.  */
   
tree
make_reference_declarator (cv_qualifiers, target)
     tree cv_qualifiers, target;
{
  if (target)
    {
      if (TREE_CODE (target) == ADDR_EXPR)
        {
          error ("cannot declare references to references");
          return target;
        }
      if (TREE_CODE (target) == INDIRECT_REF)
        {
          error ("cannot declare pointers to references");
          return target;
        }
      if (TREE_CODE (target) == IDENTIFIER_NODE && ANON_AGGRNAME_P (target))
          error ("type name expected before `&'");
    }
  target = build_parse_node (ADDR_EXPR, target);
  TREE_TYPE (target) = cv_qualifiers;
  return target;
}

tree
make_call_declarator (target, parms, cv_qualifiers, exception_specification)
     tree target, parms, cv_qualifiers, exception_specification;
{
  target = build_parse_node (CALL_EXPR, target, parms, cv_qualifiers);
  TREE_TYPE (target) = exception_specification;
  return target;
}

void
set_quals_and_spec (call_declarator, cv_qualifiers, exception_specification)
     tree call_declarator, cv_qualifiers, exception_specification;
{
  TREE_OPERAND (call_declarator, 2) = cv_qualifiers;
  TREE_TYPE (call_declarator) = exception_specification;
}
\f
/* Build names and nodes for overloaded operators.  */

tree ansi_opname[LAST_CPLUS_TREE_CODE];
tree ansi_assopname[LAST_CPLUS_TREE_CODE];

char *
operator_name_string (name)
     tree name;
{
  char *opname = IDENTIFIER_POINTER (name) + 2;
  tree *opname_table;
  int i, assign;

  /* Works for builtin and user defined types.  */
  if (IDENTIFIER_GLOBAL_VALUE (name)
      && TREE_CODE (IDENTIFIER_GLOBAL_VALUE (name)) == TYPE_DECL)
    return IDENTIFIER_POINTER (name);

  if (opname[0] == 'a' && opname[2] != '\0' && opname[2] != '_')
    {
      opname += 1;
      assign = 1;
      opname_table = ansi_assopname;
    }
  else
    {
      assign = 0;
      opname_table = ansi_opname;
    }

  for (i = 0; i < (int) LAST_CPLUS_TREE_CODE; i++)
    {
      if (opname[0] == IDENTIFIER_POINTER (opname_table[i])[2+assign]
          && opname[1] == IDENTIFIER_POINTER (opname_table[i])[3+assign])
        break;
    }

  if (i == LAST_CPLUS_TREE_CODE)
    return "<invalid operator>";

  if (assign)
    return assignop_tab[i];
  else
    return opname_tab[i];
}
\f
int interface_only;             /* whether or not current file is only for
                                   interface definitions.  */
int interface_unknown;          /* whether or not we know this class
                                   to behave according to #pragma interface.  */

/* lexical analyzer */

#ifndef WCHAR_TYPE_SIZE
#ifdef INT_TYPE_SIZE
#define WCHAR_TYPE_SIZE INT_TYPE_SIZE
#else
#define WCHAR_TYPE_SIZE BITS_PER_WORD
#endif
#endif

/* Number of bytes in a wide character.  */
#define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT)

static int maxtoken;            /* Current nominal length of token buffer.  */
char *token_buffer;             /* Pointer to token buffer.
                                   Actual allocated length is maxtoken + 2.  */

#include "hash.h"
\f

/* Nonzero tells yylex to ignore \ in string constants.  */
static int ignore_escape_flag = 0;

static tree
get_time_identifier (name)
     const char *name;
{
  tree time_identifier;
  int len = strlen (name);
  char *buf = (char *) alloca (len + 6);
  strcpy (buf, "file ");
  bcopy (name, buf+5, len);
  buf[len+5] = '\0';
  time_identifier = get_identifier (buf);
  if (TIME_IDENTIFIER_TIME (time_identifier) == NULL_TREE)
    {
      push_obstacks_nochange ();
      end_temporary_allocation ();
      TIME_IDENTIFIER_TIME (time_identifier) = build_int_2 (0, 0);
      TIME_IDENTIFIER_FILEINFO (time_identifier) 
        = build_int_2 (0, 1);
      SET_IDENTIFIER_GLOBAL_VALUE (time_identifier, filename_times);
      filename_times = time_identifier;
      pop_obstacks ();
    }
  return time_identifier;
}

#ifdef __GNUC__
__inline
#endif
static int
my_get_run_time ()
{
  int old_quiet_flag = quiet_flag;
  int this_time;
  quiet_flag = 0;
  this_time = get_run_time ();
  quiet_flag = old_quiet_flag;
  return this_time;
}
\f
/* Table indexed by tree code giving a string containing a character
   classifying the tree code.  Possibilities are
   t, d, s, c, r, <, 1 and 2.  See cp/cp-tree.def for details.  */

#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,

char cplus_tree_code_type[] = {
  'x',
#include "cp-tree.def"
};
#undef DEFTREECODE

/* Table indexed by tree code giving number of expression
   operands beyond the fixed part of the node structure.
   Not used for types or decls.  */

#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,

int cplus_tree_code_length[] = {
  0,
#include "cp-tree.def"
};
#undef DEFTREECODE

/* Names of tree components.
   Used for printing out the tree and error messages.  */
#define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,

const char *cplus_tree_code_name[] = {
  "@@dummy",
#include "cp-tree.def"
};
#undef DEFTREECODE
\f
/* toplev.c needs to call these.  */

void
lang_init_options ()
{
#if USE_CPPLIB
  cpp_reader_init (&parse_in);
  parse_in.opts = &parse_options;
  cpp_options_init (&parse_options);
#endif

  /* Default exceptions on.  */
  flag_exceptions = 1;
}

void
lang_init ()
{
  /* the beginning of the file is a new line; check for # */
  /* With luck, we discover the real source file's name from that
     and put it in input_filename.  */
#if ! USE_CPPLIB
  put_back (check_newline ());
#else
  check_newline ();
  yy_cur--;
#endif
  if (flag_gnu_xref) GNU_xref_begin (input_filename);
  init_repo (input_filename);
}

void
lang_finish ()
{
  extern int errorcount, sorrycount;
  if (flag_gnu_xref) GNU_xref_end (errorcount+sorrycount);
}

char *
lang_identify ()
{
  return "cplusplus";
}

static void
init_filename_times ()
{
  this_filename_time = get_time_identifier ("<top level>");
  if (flag_detailed_statistics)
    {
      header_time = 0;
      body_time = my_get_run_time ();
      TREE_INT_CST_LOW (TIME_IDENTIFIER_TIME (this_filename_time)) 
        = body_time;
    }
}

/* Change by Bryan Boreham, Kewill, Thu Jul 27 09:46:05 1989.
   Stuck this hack in to get the files open correctly; this is called
   in place of init_parse if we are an unexec'd binary.    */

#if 0
void
reinit_lang_specific ()
{
  init_filename_times ();
  reinit_search_statistics ();
}
#endif

static int *
init_cpp_parse ()
{
#ifdef GATHER_STATISTICS
#ifdef REDUCE_LENGTH
  reduce_count = (int *)malloc (sizeof (int) * (REDUCE_LENGTH + 1));
  bzero (reduce_count, sizeof (int) * (REDUCE_LENGTH + 1));
  reduce_count += 1;
  token_count = (int *)malloc (sizeof (int) * (TOKEN_LENGTH + 1));
  bzero (token_count, sizeof (int) * (TOKEN_LENGTH + 1));
  token_count += 1;
#endif
#endif
  return token_count;
}

char *
init_parse (filename)
     char *filename;
{
  extern int flag_no_gnu_keywords;
  extern int flag_operator_names;

  int i;

#ifdef MULTIBYTE_CHARS
  /* Change to the native locale for multibyte conversions.  */
  setlocale (LC_CTYPE, "");
  literal_codeset = getenv ("LANG");
#endif

#if USE_CPPLIB
  parse_in.show_column = 1;
  if (! cpp_start_read (&parse_in, filename))
    abort ();

  /* cpp_start_read always puts at least one line directive into the
     token buffer.  We must arrange to read it out here. */
  yy_cur = parse_in.token_buffer;
  yy_lim = CPP_PWRITTEN (&parse_in);

#else
  /* Open input file.  */
  if (filename == 0 || !strcmp (filename, "-"))
    {
      finput = stdin;
      filename = "stdin";
    }
  else
    finput = fopen (filename, "r");
  if (finput == 0)
    pfatal_with_name (filename);

#ifdef IO_BUFFER_SIZE
  setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
#endif
#endif /* !USE_CPPLIB */

  /* Initialize the lookahead machinery.  */
  init_spew ();

  /* Make identifier nodes long enough for the language-specific slots.  */
  set_identifier_size (sizeof (struct lang_identifier));
  decl_printable_name = lang_printable_name;

  init_cplus_expand ();

  bcopy (cplus_tree_code_type,
         tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE,
         (int)LAST_CPLUS_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE);
  bcopy ((char *)cplus_tree_code_length,
         (char *)(tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE),
         (LAST_CPLUS_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (int));
  bcopy ((char *)cplus_tree_code_name,
         (char *)(tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE),
         (LAST_CPLUS_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *));

  opname_tab = (char **)oballoc ((int)LAST_CPLUS_TREE_CODE * sizeof (char *));
  bzero ((char *)opname_tab, (int)LAST_CPLUS_TREE_CODE * sizeof (char *));
  assignop_tab = (char **)oballoc ((int)LAST_CPLUS_TREE_CODE * sizeof (char *));
  bzero ((char *)assignop_tab, (int)LAST_CPLUS_TREE_CODE * sizeof (char *));

  ansi_opname[0] = get_identifier ("<invalid operator>");
  for (i = 0; i < (int) LAST_CPLUS_TREE_CODE; i++)
    {
      ansi_opname[i] = ansi_opname[0];
      ansi_assopname[i] = ansi_opname[0];
    }

  ansi_opname[(int) MULT_EXPR] = get_identifier ("__ml");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) MULT_EXPR]) = 1;
  ansi_opname[(int) INDIRECT_REF] = ansi_opname[(int) MULT_EXPR];
  ansi_assopname[(int) MULT_EXPR] = get_identifier ("__aml");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) MULT_EXPR]) = 1;
  ansi_assopname[(int) INDIRECT_REF] = ansi_assopname[(int) MULT_EXPR];
  ansi_opname[(int) TRUNC_MOD_EXPR] = get_identifier ("__md");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUNC_MOD_EXPR]) = 1;
  ansi_assopname[(int) TRUNC_MOD_EXPR] = get_identifier ("__amd");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) TRUNC_MOD_EXPR]) = 1;
  ansi_opname[(int) CEIL_MOD_EXPR] = ansi_opname[(int) TRUNC_MOD_EXPR];
  ansi_opname[(int) FLOOR_MOD_EXPR] = ansi_opname[(int) TRUNC_MOD_EXPR];
  ansi_opname[(int) ROUND_MOD_EXPR] = ansi_opname[(int) TRUNC_MOD_EXPR];
  ansi_opname[(int) MINUS_EXPR] = get_identifier ("__mi");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) MINUS_EXPR]) = 1;
  ansi_opname[(int) NEGATE_EXPR] = ansi_opname[(int) MINUS_EXPR];
  ansi_assopname[(int) MINUS_EXPR] = get_identifier ("__ami");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) MINUS_EXPR]) = 1;
  ansi_assopname[(int) NEGATE_EXPR] = ansi_assopname[(int) MINUS_EXPR];
  ansi_opname[(int) RSHIFT_EXPR] = get_identifier ("__rs");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) RSHIFT_EXPR]) = 1;
  ansi_assopname[(int) RSHIFT_EXPR] = get_identifier ("__ars");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) RSHIFT_EXPR]) = 1;
  ansi_opname[(int) NE_EXPR] = get_identifier ("__ne");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) NE_EXPR]) = 1;
  ansi_opname[(int) GT_EXPR] = get_identifier ("__gt");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) GT_EXPR]) = 1;
  ansi_opname[(int) GE_EXPR] = get_identifier ("__ge");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) GE_EXPR]) = 1;
  ansi_opname[(int) BIT_IOR_EXPR] = get_identifier ("__or");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_IOR_EXPR]) = 1;
  ansi_assopname[(int) BIT_IOR_EXPR] = get_identifier ("__aor");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) BIT_IOR_EXPR]) = 1;
  ansi_opname[(int) TRUTH_ANDIF_EXPR] = get_identifier ("__aa");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUTH_ANDIF_EXPR]) = 1;
  ansi_opname[(int) TRUTH_NOT_EXPR] = get_identifier ("__nt");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUTH_NOT_EXPR]) = 1;
  ansi_opname[(int) PREINCREMENT_EXPR] = get_identifier ("__pp");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) PREINCREMENT_EXPR]) = 1;
  ansi_opname[(int) POSTINCREMENT_EXPR] = ansi_opname[(int) PREINCREMENT_EXPR];
  ansi_opname[(int) MODIFY_EXPR] = get_identifier ("__as");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) MODIFY_EXPR]) = 1;
  ansi_assopname[(int) NOP_EXPR] = ansi_opname[(int) MODIFY_EXPR];
  ansi_opname[(int) COMPOUND_EXPR] = get_identifier ("__cm");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) COMPOUND_EXPR]) = 1;
  ansi_opname[(int) EXACT_DIV_EXPR] = get_identifier ("__dv");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) EXACT_DIV_EXPR]) = 1;
  ansi_assopname[(int) EXACT_DIV_EXPR] = get_identifier ("__adv");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) EXACT_DIV_EXPR]) = 1;
  ansi_opname[(int) TRUNC_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR];
  ansi_opname[(int) CEIL_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR];
  ansi_opname[(int) FLOOR_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR];
  ansi_opname[(int) ROUND_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR];
  ansi_opname[(int) PLUS_EXPR] = get_identifier ("__pl");
  ansi_assopname[(int) TRUNC_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR];
  ansi_assopname[(int) CEIL_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR];
  ansi_assopname[(int) FLOOR_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR];
  ansi_assopname[(int) ROUND_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR];
  IDENTIFIER_OPNAME_P (ansi_opname[(int) PLUS_EXPR]) = 1;
  ansi_assopname[(int) PLUS_EXPR] = get_identifier ("__apl");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) PLUS_EXPR]) = 1;
  ansi_opname[(int) CONVERT_EXPR] = ansi_opname[(int) PLUS_EXPR];
  ansi_assopname[(int) CONVERT_EXPR] = ansi_assopname[(int) PLUS_EXPR];
  ansi_opname[(int) LSHIFT_EXPR] = get_identifier ("__ls");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) LSHIFT_EXPR]) = 1;
  ansi_assopname[(int) LSHIFT_EXPR] = get_identifier ("__als");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) LSHIFT_EXPR]) = 1;
  ansi_opname[(int) EQ_EXPR] = get_identifier ("__eq");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) EQ_EXPR]) = 1;
  ansi_opname[(int) LT_EXPR] = get_identifier ("__lt");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) LT_EXPR]) = 1;
  ansi_opname[(int) LE_EXPR] = get_identifier ("__le");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) LE_EXPR]) = 1;
  ansi_opname[(int) BIT_AND_EXPR] = get_identifier ("__ad");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_AND_EXPR]) = 1;
  ansi_assopname[(int) BIT_AND_EXPR] = get_identifier ("__aad");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) BIT_AND_EXPR]) = 1;
  ansi_opname[(int) ADDR_EXPR] = ansi_opname[(int) BIT_AND_EXPR];
  ansi_assopname[(int) ADDR_EXPR] = ansi_assopname[(int) BIT_AND_EXPR];
  ansi_opname[(int) BIT_XOR_EXPR] = get_identifier ("__er");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_XOR_EXPR]) = 1;
  ansi_assopname[(int) BIT_XOR_EXPR] = get_identifier ("__aer");
  IDENTIFIER_OPNAME_P (ansi_assopname[(int) BIT_XOR_EXPR]) = 1;
  ansi_opname[(int) TRUTH_ORIF_EXPR] = get_identifier ("__oo");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUTH_ORIF_EXPR]) = 1;
  ansi_opname[(int) BIT_NOT_EXPR] = get_identifier ("__co");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_NOT_EXPR]) = 1;
  ansi_opname[(int) PREDECREMENT_EXPR] = get_identifier ("__mm");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) PREDECREMENT_EXPR]) = 1;
  ansi_opname[(int) POSTDECREMENT_EXPR] = ansi_opname[(int) PREDECREMENT_EXPR];
  ansi_opname[(int) COMPONENT_REF] = get_identifier ("__rf");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) COMPONENT_REF]) = 1;
  ansi_opname[(int) MEMBER_REF] = get_identifier ("__rm");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) MEMBER_REF]) = 1;
  ansi_opname[(int) CALL_EXPR] = get_identifier ("__cl");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) CALL_EXPR]) = 1;
  ansi_opname[(int) ARRAY_REF] = get_identifier ("__vc");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) ARRAY_REF]) = 1;
  ansi_opname[(int) NEW_EXPR] = get_identifier ("__nw");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) NEW_EXPR]) = 1;
  ansi_opname[(int) DELETE_EXPR] = get_identifier ("__dl");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) DELETE_EXPR]) = 1;
  ansi_opname[(int) VEC_NEW_EXPR] = get_identifier ("__vn");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) VEC_NEW_EXPR]) = 1;
  ansi_opname[(int) VEC_DELETE_EXPR] = get_identifier ("__vd");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) VEC_DELETE_EXPR]) = 1;
  ansi_opname[(int) TYPE_EXPR] = get_identifier (OPERATOR_TYPENAME_FORMAT);
  IDENTIFIER_OPNAME_P (ansi_opname[(int) TYPE_EXPR]) = 1;

  /* This is not true: these operators are not defined in ANSI,
     but we need them anyway.  */
  ansi_opname[(int) MIN_EXPR] = get_identifier ("__mn");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) MIN_EXPR]) = 1;
  ansi_opname[(int) MAX_EXPR] = get_identifier ("__mx");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) MAX_EXPR]) = 1;
  ansi_opname[(int) COND_EXPR] = get_identifier ("__cn");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) COND_EXPR]) = 1;
  ansi_opname[(int) SIZEOF_EXPR] = get_identifier ("__sz");
  IDENTIFIER_OPNAME_P (ansi_opname[(int) SIZEOF_EXPR]) = 1;

  init_method ();
  init_error ();
  gcc_obstack_init (&inline_text_obstack);
  inline_text_firstobj = (char *) obstack_alloc (&inline_text_obstack, 0);

  /* Start it at 0, because check_newline is called at the very beginning
     and will increment it to 1.  */
  lineno = 0;
  input_filename = "<internal>";
  current_function_decl = NULL;

  maxtoken = 40;
  token_buffer = (char *) xmalloc (maxtoken + 2);

  ridpointers[(int) RID_INT] = get_identifier ("int");
  ridpointers[(int) RID_BOOL] = get_identifier ("bool");
  ridpointers[(int) RID_CHAR] = get_identifier ("char");
  ridpointers[(int) RID_VOID] = get_identifier ("void");
  ridpointers[(int) RID_FLOAT] = get_identifier ("float");
  ridpointers[(int) RID_DOUBLE] = get_identifier ("double");
  ridpointers[(int) RID_SHORT] = get_identifier ("short");
  ridpointers[(int) RID_LONG] = get_identifier ("long");
  ridpointers[(int) RID_UNSIGNED] = get_identifier ("unsigned");
  ridpointers[(int) RID_SIGNED] = get_identifier ("signed");
  ridpointers[(int) RID_INLINE] = get_identifier ("inline");
  ridpointers[(int) RID_CONST] = get_identifier ("const");
  ridpointers[(int) RID_VOLATILE] = get_identifier ("volatile");
  ridpointers[(int) RID_RESTRICT] = get_identifier ("__restrict");
  ridpointers[(int) RID_AUTO] = get_identifier ("auto");
  ridpointers[(int) RID_STATIC] = get_identifier ("static");
  ridpointers[(int) RID_EXTERN] = get_identifier ("extern");
  ridpointers[(int) RID_TYPEDEF] = get_identifier ("typedef");
  ridpointers[(int) RID_REGISTER] = get_identifier ("register");
  ridpointers[(int) RID_COMPLEX] = get_identifier ("__complex");

  /* C++ extensions. These are probably not correctly named.  */
  ridpointers[(int) RID_WCHAR] = get_identifier ("__wchar_t");
  class_type_node = build_int_2 (class_type, 0);
  TREE_TYPE (class_type_node) = class_type_node;
  ridpointers[(int) RID_CLASS] = class_type_node;

  record_type_node = build_int_2 (record_type, 0);
  TREE_TYPE (record_type_node) = record_type_node;
  ridpointers[(int) RID_RECORD] = record_type_node;

  union_type_node = build_int_2 (union_type, 0);
  TREE_TYPE (union_type_node) = union_type_node;
  ridpointers[(int) RID_UNION] = union_type_node;

  enum_type_node = build_int_2 (enum_type, 0);
  TREE_TYPE (enum_type_node) = enum_type_node;
  ridpointers[(int) RID_ENUM] = enum_type_node;

  ridpointers[(int) RID_VIRTUAL] = get_identifier ("virtual");
  ridpointers[(int) RID_EXPLICIT] = get_identifier ("explicit");
  ridpointers[(int) RID_EXPORT] = get_identifier ("export");
  ridpointers[(int) RID_FRIEND] = get_identifier ("friend");

  ridpointers[(int) RID_PUBLIC] = get_identifier ("public");
  ridpointers[(int) RID_PRIVATE] = get_identifier ("private");
  ridpointers[(int) RID_PROTECTED] = get_identifier ("protected");
  ridpointers[(int) RID_TEMPLATE] = get_identifier ("template");
  /* This is for ANSI C++.  */
  ridpointers[(int) RID_MUTABLE] = get_identifier ("mutable");

  /* Signature handling extensions.  */
  signature_type_node = build_int_2 (signature_type, 0);
  TREE_TYPE (signature_type_node) = signature_type_node;
  ridpointers[(int) RID_SIGNATURE] = signature_type_node;

  /* Create the built-in __null node.  Note that we can't yet call for
     type_for_size here because integer_type_node and so forth are not
     set up.  Therefore, we don't set the type of these nodes until
     init_decl_processing.  */
  null_node = build_int_2 (0, 0);
  ridpointers[RID_NULL] = null_node;

  opname_tab[(int) COMPONENT_REF] = "->";
  opname_tab[(int) MEMBER_REF] = "->*";
  opname_tab[(int) INDIRECT_REF] = "*";
  opname_tab[(int) ARRAY_REF] = "[]";
  opname_tab[(int) MODIFY_EXPR] = "=";
  opname_tab[(int) NEW_EXPR] = "new";
  opname_tab[(int) DELETE_EXPR] = "delete";
  opname_tab[(int) VEC_NEW_EXPR] = "new []";
  opname_tab[(int) VEC_DELETE_EXPR] = "delete []";
  opname_tab[(int) COND_EXPR] = "?:";
  opname_tab[(int) CALL_EXPR] = "()";
  opname_tab[(int) PLUS_EXPR] = "+";
  opname_tab[(int) MINUS_EXPR] = "-";
  opname_tab[(int) MULT_EXPR] = "*";
  opname_tab[(int) TRUNC_DIV_EXPR] = "/";
  opname_tab[(int) CEIL_DIV_EXPR] = "(ceiling /)";
  opname_tab[(int) FLOOR_DIV_EXPR] = "(floor /)";
  opname_tab[(int) ROUND_DIV_EXPR] = "(round /)";
  opname_tab[(int) TRUNC_MOD_EXPR] = "%";
  opname_tab[(int) CEIL_MOD_EXPR] = "(ceiling %)";
  opname_tab[(int) FLOOR_MOD_EXPR] = "(floor %)";
  opname_tab[(int) ROUND_MOD_EXPR] = "(round %)";
  opname_tab[(int) NEGATE_EXPR] = "-";
  opname_tab[(int) MIN_EXPR] = "<?";
  opname_tab[(int) MAX_EXPR] = ">?";
  opname_tab[(int) ABS_EXPR] = "abs";
  opname_tab[(int) FFS_EXPR] = "ffs";
  opname_tab[(int) LSHIFT_EXPR] = "<<";
  opname_tab[(int) RSHIFT_EXPR] = ">>";
  opname_tab[(int) BIT_IOR_EXPR] = "|";
  opname_tab[(int) BIT_XOR_EXPR] = "^";
  opname_tab[(int) BIT_AND_EXPR] = "&";
  opname_tab[(int) BIT_ANDTC_EXPR] = "&~";
  opname_tab[(int) BIT_NOT_EXPR] = "~";
  opname_tab[(int) TRUTH_ANDIF_EXPR] = "&&";
  opname_tab[(int) TRUTH_ORIF_EXPR] = "||";
  opname_tab[(int) TRUTH_AND_EXPR] = "strict &&";
  opname_tab[(int) TRUTH_OR_EXPR] = "strict ||";
  opname_tab[(int) TRUTH_NOT_EXPR] = "!";
  opname_tab[(int) LT_EXPR] = "<";
  opname_tab[(int) LE_EXPR] = "<=";
  opname_tab[(int) GT_EXPR] = ">";
  opname_tab[(int) GE_EXPR] = ">=";
  opname_tab[(int) EQ_EXPR] = "==";
  opname_tab[(int) NE_EXPR] = "!=";
  opname_tab[(int) IN_EXPR] = "in";
  opname_tab[(int) RANGE_EXPR] = "...";
  opname_tab[(int) CONVERT_EXPR] = "+";
  opname_tab[(int) ADDR_EXPR] = "&";
  opname_tab[(int) PREDECREMENT_EXPR] = "--";
  opname_tab[(int) PREINCREMENT_EXPR] = "++";
  opname_tab[(int) POSTDECREMENT_EXPR] = "--";
  opname_tab[(int) POSTINCREMENT_EXPR] = "++";
  opname_tab[(int) COMPOUND_EXPR] = ",";

  assignop_tab[(int) NOP_EXPR] = "=";
  assignop_tab[(int) PLUS_EXPR] =  "+=";
  assignop_tab[(int) CONVERT_EXPR] =  "+=";
  assignop_tab[(int) MINUS_EXPR] = "-=";
  assignop_tab[(int) NEGATE_EXPR] = "-=";
  assignop_tab[(int) MULT_EXPR] = "*=";
  assignop_tab[(int) INDIRECT_REF] = "*=";
  assignop_tab[(int) TRUNC_DIV_EXPR] = "/=";
  assignop_tab[(int) EXACT_DIV_EXPR] = "(exact /=)";
  assignop_tab[(int) CEIL_DIV_EXPR] = "(ceiling /=)";
  assignop_tab[(int) FLOOR_DIV_EXPR] = "(floor /=)";
  assignop_tab[(int) ROUND_DIV_EXPR] = "(round /=)";
  assignop_tab[(int) TRUNC_MOD_EXPR] = "%=";
  assignop_tab[(int) CEIL_MOD_EXPR] = "(ceiling %=)";
  assignop_tab[(int) FLOOR_MOD_EXPR] = "(floor %=)";
  assignop_tab[(int) ROUND_MOD_EXPR] = "(round %=)";
  assignop_tab[(int) MIN_EXPR] = "<?=";
  assignop_tab[(int) MAX_EXPR] = ">?=";
  assignop_tab[(int) LSHIFT_EXPR] = "<<=";
  assignop_tab[(int) RSHIFT_EXPR] = ">>=";
  assignop_tab[(int) BIT_IOR_EXPR] = "|=";
  assignop_tab[(int) BIT_XOR_EXPR] = "^=";
  assignop_tab[(int) BIT_AND_EXPR] = "&=";
  assignop_tab[(int) ADDR_EXPR] = "&=";

  init_filename_times ();

  /* Some options inhibit certain reserved words.
     Clear those words out of the hash table so they won't be recognized.  */
#define UNSET_RESERVED_WORD(STRING) \
  do { struct resword *s = is_reserved_word (STRING, sizeof (STRING) - 1); \
       if (s) s->name = ""; } while (0)

#if 0
  /* let's parse things, and if they use it, then give them an error.  */
  if (!flag_exceptions)
    {
      UNSET_RESERVED_WORD ("throw");
      UNSET_RESERVED_WORD ("try");
      UNSET_RESERVED_WORD ("catch");
    }
#endif

  if (!flag_rtti || flag_no_gnu_keywords)
    {
      UNSET_RESERVED_WORD ("classof");
      UNSET_RESERVED_WORD ("headof");
    }

  if (! flag_handle_signatures || flag_no_gnu_keywords)
    {
      /* Easiest way to not recognize signature
         handling extensions...  */
      UNSET_RESERVED_WORD ("signature");
      UNSET_RESERVED_WORD ("sigof");
    }
  if (flag_no_asm || flag_no_gnu_keywords)
    UNSET_RESERVED_WORD ("typeof");
  if (! flag_operator_names)
    {
      /* These are new ANSI keywords that may break code.  */
      UNSET_RESERVED_WORD ("and");
      UNSET_RESERVED_WORD ("and_eq");
      UNSET_RESERVED_WORD ("bitand");
      UNSET_RESERVED_WORD ("bitor");
      UNSET_RESERVED_WORD ("compl");
      UNSET_RESERVED_WORD ("not");
      UNSET_RESERVED_WORD ("not_eq");
      UNSET_RESERVED_WORD ("or");
      UNSET_RESERVED_WORD ("or_eq");
      UNSET_RESERVED_WORD ("xor");
      UNSET_RESERVED_WORD ("xor_eq");
    }

  token_count = init_cpp_parse ();
  interface_unknown = 1;

  return filename;
}

void
finish_parse ()
{
#if USE_CPPLIB
  cpp_finish (&parse_in);
#else
  fclose (finput);
#endif
}

void
reinit_parse_for_function ()
{
  current_base_init_list = NULL_TREE;
  current_member_init_list = NULL_TREE;
}
\f
#ifdef __GNUC__
__inline
#endif
void
yyprint (file, yychar, yylval)
     FILE *file;
     int yychar;
     YYSTYPE yylval;
{
  tree t;
  switch (yychar)
    {
    case IDENTIFIER:
    case TYPENAME:
    case TYPESPEC:
    case PTYPENAME:
    case IDENTIFIER_DEFN:
    case TYPENAME_DEFN:
    case PTYPENAME_DEFN:
    case SCSPEC:
    case PRE_PARSED_CLASS_DECL:
      t = yylval.ttype;
      if (TREE_CODE (t) == TYPE_DECL || TREE_CODE (t) == TEMPLATE_DECL)
        {
          fprintf (file, " `%s'", IDENTIFIER_POINTER (DECL_NAME (t)));
          break;
        }
      my_friendly_assert (TREE_CODE (t) == IDENTIFIER_NODE, 224);
      if (IDENTIFIER_POINTER (t))
          fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
      break;
    case AGGR:
      if (yylval.ttype == class_type_node)
        fprintf (file, " `class'");
      else if (yylval.ttype == record_type_node)
        fprintf (file, " `struct'");
      else if (yylval.ttype == union_type_node)
        fprintf (file, " `union'");
      else if (yylval.ttype == enum_type_node)
        fprintf (file, " `enum'");
      else if (yylval.ttype == signature_type_node)
        fprintf (file, " `signature'");
      else
        my_friendly_abort (80);
      break;
    }
}

#if defined(GATHER_STATISTICS) && defined(REDUCE_LENGTH)
static int *reduce_count;
#endif

int *token_count;

#if 0
#define REDUCE_LENGTH (sizeof (yyr2) / sizeof (yyr2[0]))
#define TOKEN_LENGTH (256 + sizeof (yytname) / sizeof (yytname[0]))
#endif

#ifdef GATHER_STATISTICS
#ifdef REDUCE_LENGTH
void
yyhook (yyn)
     int yyn;
{
  reduce_count[yyn] += 1;
}

static int
reduce_cmp (p, q)
     int *p, *q;
{
  return reduce_count[*q] - reduce_count[*p];
}

static int
token_cmp (p, q)
     int *p, *q;
{
  return token_count[*q] - token_count[*p];
}
#endif
#endif

void
print_parse_statistics ()
{
#ifdef GATHER_STATISTICS
#ifdef REDUCE_LENGTH
#if YYDEBUG != 0
  int i;
  int maxlen = REDUCE_LENGTH;
  unsigned *sorted;
  
  if (reduce_count[-1] == 0)
    return;

  if (TOKEN_LENGTH > REDUCE_LENGTH)
    maxlen = TOKEN_LENGTH;
  sorted = (unsigned *) alloca (sizeof (int) * maxlen);

  for (i = 0; i < TOKEN_LENGTH; i++)
    sorted[i] = i;
  qsort (sorted, TOKEN_LENGTH, sizeof (int), token_cmp);
  for (i = 0; i < TOKEN_LENGTH; i++)
    {
      int idx = sorted[i];
      if (token_count[idx] == 0)
        break;
      if (token_count[idx] < token_count[-1])
        break;
      fprintf (stderr, "token %d, `%s', count = %d\n",
               idx, yytname[YYTRANSLATE (idx)], token_count[idx]);
    }
  fprintf (stderr, "\n");
  for (i = 0; i < REDUCE_LENGTH; i++)
    sorted[i] = i;
  qsort (sorted, REDUCE_LENGTH, sizeof (int), reduce_cmp);
  for (i = 0; i < REDUCE_LENGTH; i++)
    {
      int idx = sorted[i];
      if (reduce_count[idx] == 0)
        break;
      if (reduce_count[idx] < reduce_count[-1])
        break;
      fprintf (stderr, "rule %d, line %d, count = %d\n",
               idx, yyrline[idx], reduce_count[idx]);
    }
  fprintf (stderr, "\n");
#endif
#endif
#endif
}

/* Sets the value of the 'yydebug' variable to VALUE.
   This is a function so we don't have to have YYDEBUG defined
   in order to build the compiler.  */

void
set_yydebug (value)
     int value;
{
#if YYDEBUG != 0
  extern int yydebug;
  yydebug = value;
#else
  warning ("YYDEBUG not defined.");
#endif
}

\f
/* Functions and data structures for #pragma interface.

   `#pragma implementation' means that the main file being compiled
   is considered to implement (provide) the classes that appear in
   its main body.  I.e., if this is file "foo.cc", and class `bar'
   is defined in "foo.cc", then we say that "foo.cc implements bar".

   All main input files "implement" themselves automagically.

   `#pragma interface' means that unless this file (of the form "foo.h"
   is not presently being included by file "foo.cc", the
   CLASSTYPE_INTERFACE_ONLY bit gets set.  The effect is that none
   of the vtables nor any of the inline functions defined in foo.h
   will ever be output.

   There are cases when we want to link files such as "defs.h" and
   "main.cc".  In this case, we give "defs.h" a `#pragma interface',
   and "main.cc" has `#pragma implementation "defs.h"'.  */

struct impl_files
{
  char *filename;
  struct impl_files *next;
};

static struct impl_files *impl_file_chain;

/* Helper function to load global variables with interface
   information.  */

void
extract_interface_info ()
{
  tree fileinfo = 0;

  if (flag_alt_external_templates)
    {
      struct tinst_level *til = tinst_for_decl ();
  
      if (til)
        fileinfo = get_time_identifier (til->file);
    }
  if (!fileinfo)
    fileinfo = get_time_identifier (input_filename);
  fileinfo = TIME_IDENTIFIER_FILEINFO (fileinfo);
  interface_only = TREE_INT_CST_LOW (fileinfo);
  interface_unknown = TREE_INT_CST_HIGH (fileinfo);
}

/* Return nonzero if S is not considered part of an
   INTERFACE/IMPLEMENTATION pair.  Otherwise, return 0.  */

static int
interface_strcmp (s)
     const char *s;
{
  /* Set the interface/implementation bits for this scope.  */
  struct impl_files *ifiles;
  const char *s1;

  for (ifiles = impl_file_chain; ifiles; ifiles = ifiles->next)
    {
      const char *t1 = ifiles->filename;
      s1 = s;

      if (*s1 != *t1 || *s1 == 0)
        continue;

      while (*s1 == *t1 && *s1 != 0)
        s1++, t1++;

      /* A match.  */
      if (*s1 == *t1)
        return 0;

      /* Don't get faked out by xxx.yyy.cc vs xxx.zzz.cc.  */
      if (index (s1, '.') || index (t1, '.'))
        continue;

      if (*s1 == '\0' || s1[-1] != '.' || t1[-1] != '.')
        continue;

      /* A match.  */
      return 0;
    }

  /* No matches.  */
  return 1;
}

static int
set_typedecl_interface_info (t, data)
     tree *t;
     void *data ATTRIBUTE_UNUSED;
{
  tree id = get_time_identifier (DECL_SOURCE_FILE (*t));
  tree fileinfo = TIME_IDENTIFIER_FILEINFO (id);
  tree type = TREE_TYPE (*t);

  CLASSTYPE_INTERFACE_ONLY (type) = TREE_INT_CST_LOW (fileinfo)
    = interface_strcmp (file_name_nondirectory (DECL_SOURCE_FILE (*t)));
  return 0;
}

static int
set_vardecl_interface_info (t, data)
     tree *t;
     void *data ATTRIBUTE_UNUSED;
{
  tree type = DECL_CONTEXT (*t);

  if (CLASSTYPE_INTERFACE_KNOWN (type))
    {
      if (CLASSTYPE_INTERFACE_ONLY (type))
        set_typedecl_interface_info (&TYPE_MAIN_DECL (type), data);
      else
        CLASSTYPE_VTABLE_NEEDS_WRITING (type) = 1;
      DECL_EXTERNAL (*t) = CLASSTYPE_INTERFACE_ONLY (type);
      TREE_PUBLIC (*t) = 1;
      return 1;
    }
  return 0;
}
\f
/* Set up the state required to correctly handle the definition of the
   inline function whose preparsed state has been saved in PI.  */

static void
begin_definition_of_inclass_inline (pi)
     struct pending_inline* pi;
{
  tree context;

  if (!pi->fndecl)
    return;

  /* If this is an inline function in a local class, we must make sure
     that we save all pertinent information about the function
     surrounding the local class.  */
  context = hack_decl_function_context (pi->fndecl);
  if (context)
    push_cp_function_context (context);

  feed_input (pi->buf, pi->len);
  lineno = pi->lineno;
  input_filename = pi->filename;
  yychar = PRE_PARSED_FUNCTION_DECL;
  yylval.ttype = build_tree_list ((tree) pi, pi->fndecl);
  /* Pass back a handle to the rest of the inline functions, so that they
     can be processed later.  */
  DECL_PENDING_INLINE_INFO (pi->fndecl) = 0;
  interface_unknown = pi->interface == 1;
  interface_only  = pi->interface == 0;
}

/* Called from the top level: if there are any pending inlines to
   do, set up to process them now.  This function sets up the first function
   to be parsed; after it has been, the rule for fndef in parse.y will
   call process_next_inline to start working on the next one.  */

void
do_pending_inlines ()
{
  struct pending_inline *t;

  /* Oops, we're still dealing with the last batch.  */
  if (yychar == PRE_PARSED_FUNCTION_DECL)
    return;

  /* Reverse the pending inline functions, since
     they were cons'd instead of appended.  */
  {
    struct pending_inline *prev = 0, *tail;
    t = pending_inlines;
    pending_inlines = 0;

    for (; t; t = tail)
      {
        tail = t->next;
        t->next = prev;
        t->deja_vu = 1;
        prev = t;
      }
    t = prev;
  }

  if (t == 0)
    return;
            
  /* Now start processing the first inline function.  */
  begin_definition_of_inclass_inline (t);
}

static int nextchar = -1;

/* Called from the fndecl rule in the parser when the function just parsed
   was declared using a PRE_PARSED_FUNCTION_DECL (i.e. came from
   do_pending_inlines).  */

void
process_next_inline (t)
     tree t;
{
  tree context;
  struct pending_inline *i = (struct pending_inline *) TREE_PURPOSE (t);
  context = hack_decl_function_context (i->fndecl);  
  if (context)
    pop_cp_function_context (context);
  i = i->next;
  if (yychar == YYEMPTY)
    yychar = yylex ();
  if (yychar != END_OF_SAVED_INPUT)
    {
      error ("parse error at end of saved function text");

      /* restore_pending_input will abort unless yychar is either
         END_OF_SAVED_INPUT or YYEMPTY; since we already know we're
         hosed, feed back YYEMPTY.  We also need to discard nextchar,
         since that may have gotten set as well.  */
      nextchar = -1;
    }
  yychar = YYEMPTY;
  end_input ();
  if (i)
    begin_definition_of_inclass_inline (i);
  else
    extract_interface_info ();
}

/* Since inline methods can refer to text which has not yet been seen,
   we store the text of the method in a structure which is placed in the
   DECL_PENDING_INLINE_INFO field of the FUNCTION_DECL.
   After parsing the body of the class definition, the FUNCTION_DECL's are
   scanned to see which ones have this field set.  Those are then digested
   one at a time.

   This function's FUNCTION_DECL will have a bit set in its common so
   that we know to watch out for it.  */

static void
consume_string (this_obstack, matching_char)
     register struct obstack *this_obstack;
     int matching_char;
{
  register int c;
  int starting_lineno = lineno;
  do
    {
      c = getch ();
      if (c == EOF)
        {
          int save_lineno = lineno;
          lineno = starting_lineno;
          if (matching_char == '"')
            error ("end of file encountered inside string constant");
          else
            error ("end of file encountered inside character constant");
          lineno = save_lineno;
          return;
        }
      if (c == '\\')
        {
          obstack_1grow (this_obstack, c);
          c = getch ();
          obstack_1grow (this_obstack, c);

          /* Make sure we continue the loop */
          c = 0;
          continue;
        }
      if (c == '\n')
        {
          if (pedantic)
            pedwarn ("ANSI C++ forbids newline in string constant");
          lineno++;
        }
      obstack_1grow (this_obstack, c);
    }
  while (c != matching_char);
}

static int nextyychar = YYEMPTY;
static YYSTYPE nextyylval;

struct pending_input {
  int nextchar, yychar, nextyychar, eof;
  YYSTYPE yylval, nextyylval;
  struct obstack token_obstack;
  int first_token;
};

struct pending_input *
save_pending_input ()
{
  struct pending_input *p;
  p = (struct pending_input *) xmalloc (sizeof (struct pending_input));
  p->nextchar = nextchar;
  p->yychar = yychar;
  p->nextyychar = nextyychar;
  p->yylval = yylval;
  p->nextyylval = nextyylval;
  p->eof = end_of_file;
  yychar = nextyychar = YYEMPTY;
  nextchar = -1;
  p->first_token = first_token;
  p->token_obstack = token_obstack;

  first_token = 0;
  gcc_obstack_init (&token_obstack);
  end_of_file = 0;
  return p;
}

void
restore_pending_input (p)
     struct pending_input *p;
{
  my_friendly_assert (nextchar == -1, 229);
  nextchar = p->nextchar;
  my_friendly_assert (yychar == YYEMPTY || yychar == END_OF_SAVED_INPUT, 230);
  yychar = p->yychar;
  my_friendly_assert (nextyychar == YYEMPTY, 231);
  nextyychar = p->nextyychar;
  yylval = p->yylval;
  nextyylval = p->nextyylval;
  first_token = p->first_token;
  obstack_free (&token_obstack, (char *) 0);
  token_obstack = p->token_obstack;
  end_of_file = p->eof;
  free (p);
}

/* Unget character CH from the input stream.
   If RESCAN is non-zero, then we want to `see' this
   character as the next input token.  */

void
yyungetc (ch, rescan)
     int ch;
     int rescan;
{
  /* Unget a character from the input stream.  */
  if (yychar == YYEMPTY || rescan == 0)
    {
      if (nextchar >= 0)
        put_back (nextchar);
      nextchar = ch;
    }
  else
    {
      my_friendly_assert (nextyychar == YYEMPTY, 232);
      nextyychar = yychar;
      nextyylval = yylval;
      yychar = ch;
    }
}

void
clear_inline_text_obstack ()
{
  obstack_free (&inline_text_obstack, inline_text_firstobj);
}

/* This function stores away the text for an inline function that should
   be processed later.  It decides how much later, and may need to move
   the info between obstacks; therefore, the caller should not refer to
   the T parameter after calling this function.  */

static void
store_pending_inline (decl, t)
     tree decl;
     struct pending_inline *t;
{
  t->fndecl = decl;
  DECL_PENDING_INLINE_INFO (decl) = t;

  /* Because we use obstacks, we must process these in precise order.  */
  t->next = pending_inlines;
  pending_inlines = t;
}

void
reinit_parse_for_method (yychar, decl)
     int yychar;
     tree decl;
{
  int len;
  int starting_lineno = lineno;
  char *starting_filename = input_filename;

  reinit_parse_for_block (yychar, &inline_text_obstack);

  len = obstack_object_size (&inline_text_obstack);
  current_base_init_list = NULL_TREE;
  current_member_init_list = NULL_TREE;
  if (decl == void_type_node
      || (current_class_type && TYPE_REDEFINED (current_class_type)))
    {
      /* Happens when we get two declarations of the same
         function in the same scope.  */
      char *buf = obstack_finish (&inline_text_obstack);
      obstack_free (&inline_text_obstack, buf);
      return;
    }
  else
    {
      struct pending_inline *t;
      char *buf = obstack_finish (&inline_text_obstack);

      t = (struct pending_inline *) obstack_alloc (&inline_text_obstack,
                                                   sizeof (struct pending_inline));
      t->lineno = starting_lineno;
      t->filename = starting_filename;
      t->token = YYEMPTY;
      t->token_value = 0;
      t->buf = buf;
      t->len = len;
      t->deja_vu = 0;
#if 0
      if (interface_unknown && processing_template_defn && flag_external_templates && ! DECL_IN_SYSTEM_HEADER (decl))
        warn_if_unknown_interface (decl);
#endif
      t->interface = (interface_unknown ? 1 : (interface_only ? 0 : 2));
      store_pending_inline (decl, t);
    }
}

/* Consume a block -- actually, a method beginning
   with `:' or `{' -- and save it away on the specified obstack.  */

void
reinit_parse_for_block (pyychar, obstackp)
     int pyychar;
     struct obstack *obstackp;
{
  register int c = 0;
  int blev = 1;
  int starting_lineno = lineno;
  char *starting_filename = input_filename;
  int len;
  int look_for_semicolon = 0;
  int look_for_lbrac = 0;

  if (pyychar == '{')
    obstack_1grow (obstackp, '{');
  else if (pyychar == '=')
    look_for_semicolon = 1;
  else if (pyychar == ':')
    {
      obstack_1grow (obstackp, pyychar);
      /* Add a space so we don't get confused by ': ::A(20)'.  */
      obstack_1grow (obstackp, ' ');
      look_for_lbrac = 1;
      blev = 0;
    }
  else if (pyychar == RETURN_KEYWORD)
    {
      obstack_grow (obstackp, "return", 6);
      look_for_lbrac = 1;
      blev = 0;
    }
  else if (pyychar == TRY)
    {
      obstack_grow (obstackp, "try", 3);
      look_for_lbrac = 1;
      blev = 0;
    }
  else
    {
      yyerror ("parse error in method specification");
      obstack_1grow (obstackp, '{');
    }

  if (nextchar != EOF)
    {
      c = nextchar;
      nextchar = EOF;
    }
  else
    c = getch ();
  
  while (c != EOF)
    {
      int this_lineno = lineno;

      c = skip_white_space (c);

      /* Don't lose our cool if there are lots of comments.  */
      if (lineno == this_lineno + 1)
        obstack_1grow (obstackp, '\n');
      else if (lineno == this_lineno)
        ;
      else if (lineno - this_lineno < 10)
        {
          int i;
          for (i = lineno - this_lineno; i > 0; i--)
            obstack_1grow (obstackp, '\n');
        }
      else
        {
          char buf[16];
          sprintf (buf, "\n# %d \"", lineno);
          len = strlen (buf);
          obstack_grow (obstackp, buf, len);

          len = strlen (input_filename);
          obstack_grow (obstackp, input_filename, len);
          obstack_1grow (obstackp, '\"');
          obstack_1grow (obstackp, '\n');
        }

      while (c > ' ')           /* ASCII dependent...  */
        {
          obstack_1grow (obstackp, c);
          if (c == '{')
            {
              look_for_lbrac = 0;
              blev++;
            }
          else if (c == '}')
            {
              blev--;
              if (blev == 0 && !look_for_semicolon)
                {
                  if (pyychar == TRY)
                    {
                      if (peekyylex () == CATCH)
                        {
                          yylex ();
                          obstack_grow (obstackp, " catch ", 7);
                          look_for_lbrac = 1;
                        }
                      else
                        {
                          yychar = '{';
                          goto done;
                        }
                    }
                  else
                    {
                      goto done;
                    }
                }
            }
          else if (c == '\\')
            {
              /* Don't act on the next character...e.g, doing an escaped
                 double-quote.  */
              c = getch ();
              if (c == EOF)
                {
                  error_with_file_and_line (starting_filename,
                                            starting_lineno,
                                            "end of file read inside definition");
                  goto done;
                }
              obstack_1grow (obstackp, c);
            }
          else if (c == '\"')
            consume_string (obstackp, c);
          else if (c == '\'')
            consume_string (obstackp, c);
          else if (c == ';')
            {
              if (look_for_lbrac)
                {
                  error ("function body for constructor missing");
                  obstack_1grow (obstackp, '{');
                  obstack_1grow (obstackp, '}');
                  len += 2;
                  goto done;
                }
              else if (look_for_semicolon && blev == 0)
                goto done;
            }
          c = getch ();
        }

      if (c == EOF)
        {
          error_with_file_and_line (starting_filename,
                                    starting_lineno,
                                    "end of file read inside definition");
          goto done;
        }
      else if (c != '\n')
        {
          obstack_1grow (obstackp, c);
          c = getch ();
        }
    }
 done:
  obstack_1grow (obstackp, '\0');
}

/* Consume a no-commas expression -- actually, a default argument -- and
   save it away on the specified obstack.  */

static void
reinit_parse_for_expr (obstackp)
     struct obstack *obstackp;
{
  register int c = 0;
  int starting_lineno = lineno;
  char *starting_filename = input_filename;
  int len;
  int plev = 0;

  if (nextchar != EOF)
    {
      c = nextchar;
      nextchar = EOF;
    }
  else
    c = getch ();
  
  while (c != EOF)
    {
      int this_lineno = lineno;

      c = skip_white_space (c);

      /* Don't lose our cool if there are lots of comments.  */
      if (lineno == this_lineno + 1)
        obstack_1grow (obstackp, '\n');
      else if (lineno == this_lineno)
        ;
      else if (lineno - this_lineno < 10)
        {
          int i;
          for (i = lineno - this_lineno; i > 0; --i)
            obstack_1grow (obstackp, '\n');
        }
      else
        {
          char buf[16];
          sprintf (buf, "\n# %d \"", lineno);
          len = strlen (buf);
          obstack_grow (obstackp, buf, len);

          len = strlen (input_filename);
          obstack_grow (obstackp, input_filename, len);
          obstack_1grow (obstackp, '\"');
          obstack_1grow (obstackp, '\n');
        }

      while (c > ' ')           /* ASCII dependent...  */
        {
          if (plev <= 0 && (c == ')' || c == ','))
            {
              put_back (c);
              goto done;
            }
          obstack_1grow (obstackp, c);
          if (c == '(' || c == '[')
            ++plev;
          else if (c == ']' || c == ')')
            --plev;
          else if (c == '\\')
            {
              /* Don't act on the next character...e.g, doing an escaped
                 double-quote.  */
              c = getch ();
              if (c == EOF)
                {
                  error_with_file_and_line (starting_filename,
                                            starting_lineno,
                                            "end of file read inside definition");
                  goto done;
                }
              obstack_1grow (obstackp, c);
            }
          else if (c == '\"')
            consume_string (obstackp, c);
          else if (c == '\'')
            consume_string (obstackp, c);
          c = getch ();
        }

      if (c == EOF)
        {
          error_with_file_and_line (starting_filename,
                                    starting_lineno,
                                    "end of file read inside definition");
          goto done;
        }
      else if (c != '\n')
        {
          obstack_1grow (obstackp, c);
          c = getch ();
        }
    }
 done:
  obstack_1grow (obstackp, '\0');
}

int do_snarf_defarg;

/* Decide whether the default argument we are about to see should be
   gobbled up as text for later parsing.  */

void
maybe_snarf_defarg ()
{
  if (current_class_type && TYPE_BEING_DEFINED (current_class_type))
    do_snarf_defarg = 1;
}

/* When we see a default argument in a method declaration, we snarf it as
   text using snarf_defarg.  When we get up to namespace scope, we then go
   through and parse all of them using do_pending_defargs.  Since yacc
   parsers are not reentrant, we retain defargs state in these two
   variables so that subsequent calls to do_pending_defargs can resume
   where the previous call left off.  */

tree defarg_fns;
tree defarg_parm;

tree
snarf_defarg ()
{
  int len;
  char *buf;
  tree arg;

  reinit_parse_for_expr (&inline_text_obstack);
  len = obstack_object_size (&inline_text_obstack);
  buf = obstack_finish (&inline_text_obstack);

  push_obstacks (&inline_text_obstack, &inline_text_obstack);
  arg = make_node (DEFAULT_ARG);
  DEFARG_LENGTH (arg) = len - 1;
  DEFARG_POINTER (arg) = buf;
  pop_obstacks ();

  return arg;
}

/* Called from grokfndecl to note a function decl with unparsed default
   arguments for later processing.  Also called from grokdeclarator
   for function types with unparsed defargs; the call from grokfndecl
   will always come second, so we can overwrite the entry from the type.  */

void
add_defarg_fn (decl)
     tree decl;
{
  if (TREE_CODE (decl) == FUNCTION_DECL)
    TREE_VALUE (defarg_fns) = decl;
  else
    {
      push_obstacks (&inline_text_obstack, &inline_text_obstack);
      defarg_fns = tree_cons (current_class_type, decl, defarg_fns);  
      pop_obstacks ();
    }
}

/* Helper for do_pending_defargs.  Starts the parsing of a default arg.  */

static void
feed_defarg (f, p)
     tree f, p;
{
  tree d = TREE_PURPOSE (p);
  feed_input (DEFARG_POINTER (d), DEFARG_LENGTH (d));
  if (TREE_CODE (f) == FUNCTION_DECL)
    {
      lineno = DECL_SOURCE_LINE (f);
      input_filename = DECL_SOURCE_FILE (f);
    }
  yychar = DEFARG_MARKER;
  yylval.ttype = p;
}

/* Helper for do_pending_defargs.  Ends the parsing of a default arg.  */

static void
finish_defarg ()
{
  if (yychar == YYEMPTY)
    yychar = yylex ();
  if (yychar != END_OF_SAVED_INPUT)
    {
      error ("parse error at end of saved function text");

      /* restore_pending_input will abort unless yychar is either
         END_OF_SAVED_INPUT or YYEMPTY; since we already know we're
         hosed, feed back YYEMPTY.  We also need to discard nextchar,
         since that may have gotten set as well.  */
      nextchar = -1;
    }
  yychar = YYEMPTY;
  end_input ();
}  

/* Main function for deferred parsing of default arguments.  Called from
   the parser.  */

void
do_pending_defargs ()
{
  if (defarg_parm)
    finish_defarg ();

  for (; defarg_fns; defarg_fns = TREE_CHAIN (defarg_fns))
    {
      tree defarg_fn = TREE_VALUE (defarg_fns);
      if (defarg_parm == NULL_TREE)
        {
          push_nested_class (TREE_PURPOSE (defarg_fns), 1);
          pushlevel (0);
          if (TREE_CODE (defarg_fn) == FUNCTION_DECL)
            maybe_begin_member_template_processing (defarg_fn);

          if (TREE_CODE (defarg_fn) == FUNCTION_DECL)
            {
#if 0
              tree p;
              for (p = DECL_ARGUMENTS (defarg_fn); p; p = TREE_CHAIN (p))
                pushdecl (copy_node (p));
#endif
              defarg_parm = TYPE_ARG_TYPES (TREE_TYPE (defarg_fn));
            }
          else
            defarg_parm = TYPE_ARG_TYPES (defarg_fn);
        }
      else
        defarg_parm = TREE_CHAIN (defarg_parm);

      for (; defarg_parm; defarg_parm = TREE_CHAIN (defarg_parm))
        if (TREE_PURPOSE (defarg_parm)
            && TREE_CODE (TREE_PURPOSE (defarg_parm)) == DEFAULT_ARG)
          {
            feed_defarg (defarg_fn, defarg_parm);

            /* Return to the parser, which will process this defarg
               and call us again.  */
            return;
          }

      if (TREE_CODE (defarg_fn) == FUNCTION_DECL)
        {
          maybe_end_member_template_processing ();
          check_default_args (defarg_fn);
        }

      poplevel (0, 0, 0);
      pop_nested_class ();
    }
}

/* Build a default function named NAME for type TYPE.
   KIND says what to build.

   When KIND == 0, build default destructor.
   When KIND == 1, build virtual destructor.
   When KIND == 2, build default constructor.
   When KIND == 3, build default X(const X&) constructor.
   When KIND == 4, build default X(X&) constructor.
   When KIND == 5, build default operator = (const X&).
   When KIND == 6, build default operator = (X&).  */

tree
cons_up_default_function (type, full_name, kind)
     tree type, full_name;
     int kind;
{
  extern tree void_list_node;
  tree declspecs = NULL_TREE;
  tree fn, args = NULL_TREE;
  tree argtype;
  int retref = 0;
  tree name = constructor_name (full_name);

  switch (kind)
    {
      /* Destructors.  */
    case 1:
      declspecs = build_decl_list (NULL_TREE, ridpointers [(int) RID_VIRTUAL]);
      /* Fall through...  */
    case 0:
      name = build_parse_node (BIT_NOT_EXPR, name);
      args = void_list_node;
      break;

    case 2:
      /* Default constructor.  */
      args = void_list_node;
      break;

    case 3:
      type = build_qualified_type (type, TYPE_QUAL_CONST);
      /* Fall through...  */
    case 4:
      /* According to ARM $12.8, the default copy ctor will be declared, but
         not defined, unless it's needed.  */
      argtype = build_reference_type (type);
      args = tree_cons (NULL_TREE,
                        build_tree_list (hash_tree_chain (argtype, NULL_TREE),
                                         get_identifier ("_ctor_arg")),
                        void_list_node);
      break;

    case 5:
    case 6:
      retref = 1;
      declspecs = build_decl_list (NULL_TREE, type);

      if (kind == 5)
        type = build_qualified_type (type, TYPE_QUAL_CONST);

      name = ansi_opname [(int) MODIFY_EXPR];

      argtype = build_reference_type (type);
      args = tree_cons (NULL_TREE,
                        build_tree_list (hash_tree_chain (argtype, NULL_TREE),
                                         get_identifier ("_ctor_arg")),
                        void_list_node);
      break;

    default:
      my_friendly_abort (59);
    }

  declspecs = decl_tree_cons (NULL_TREE, ridpointers [(int) RID_INLINE],
                              declspecs);

  TREE_PARMLIST (args) = 1;

  {
    tree declarator = make_call_declarator (name, args, NULL_TREE, NULL_TREE);
    if (retref)
      declarator = build_parse_node (ADDR_EXPR, declarator);

    fn = grokfield (declarator, declspecs, NULL_TREE, NULL_TREE, NULL_TREE);
  }
  
  if (fn == void_type_node)
    return fn;

  if (kind > 2)
    SET_DECL_ARTIFICIAL (TREE_CHAIN (DECL_ARGUMENTS (fn)));

#if 0
  if (processing_template_defn)
    {
      SET_DECL_IMPLICIT_INSTANTIATION (fn);
      repo_template_used (fn);
    }
#endif

#if 0
  if (CLASSTYPE_INTERFACE_KNOWN (type))
    {
      DECL_INTERFACE_KNOWN (fn) = 1;
      DECL_NOT_REALLY_EXTERN (fn) = (!CLASSTYPE_INTERFACE_ONLY (type)
                                     && flag_implement_inlines);
    }
  else
#endif
    DECL_NOT_REALLY_EXTERN (fn) = 1;

  mark_inline_for_output (fn);

#ifdef DEBUG_DEFAULT_FUNCTIONS
  { char *fn_type = NULL;
    tree t = name;
    switch (kind)
      {
      case 0: fn_type = "default destructor"; break;
      case 1: fn_type = "virtual destructor"; break;
      case 2: fn_type = "default constructor"; break;
      case 3: fn_type = "default X(const X&)"; break;
      case 4: fn_type = "default X(X&)"; break;
      }
    if (fn_type)
      {
        if (TREE_CODE (name) == BIT_NOT_EXPR)
          t = TREE_OPERAND (name, 0);
        fprintf (stderr, "[[[[ %s for %s:\n%s]]]]\n", fn_type,
                 IDENTIFIER_POINTER (t), func_buf);
      }
  }
#endif /* DEBUG_DEFAULT_FUNCTIONS */

  /* Show that this function was generated by the compiler.  */
  SET_DECL_ARTIFICIAL (fn);
  
  return fn;
}

/* Heuristic to tell whether the user is missing a semicolon
   after a struct or enum declaration.  Emit an error message
   if we know the user has blown it.  */

void
check_for_missing_semicolon (type)
     tree type;
{
  if (yychar < 0)
    yychar = yylex ();

  if ((yychar > 255
       && yychar != SCSPEC
       && yychar != IDENTIFIER
       && yychar != TYPENAME
       && yychar != CV_QUALIFIER
       && yychar != SELFNAME)
      || end_of_file)
    {
      if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (type)))
        error ("semicolon missing after %s declaration",
               TREE_CODE (type) == ENUMERAL_TYPE ? "enum" : "struct");
      else
        cp_error ("semicolon missing after declaration of `%T'", type);
      shadow_tag (build_tree_list (0, type));
    }
  /* Could probably also hack cases where class { ... } f (); appears.  */
  clear_anon_tags ();
}

void
note_got_semicolon (type)
     tree type;
{
  if (TREE_CODE_CLASS (TREE_CODE (type)) != 't')
    my_friendly_abort (60);
  if (CLASS_TYPE_P (type))
    CLASSTYPE_GOT_SEMICOLON (type) = 1;
}

void
note_list_got_semicolon (declspecs)
     tree declspecs;
{
  tree link;

  for (link = declspecs; link; link = TREE_CHAIN (link))
    {
      tree type = TREE_VALUE (link);
      if (TREE_CODE_CLASS (TREE_CODE (type)) == 't')
        note_got_semicolon (type);
    }
  clear_anon_tags ();
}
\f
/* If C is not whitespace, return C.
   Otherwise skip whitespace and return first nonwhite char read.  */

static int
skip_white_space (c)
     register int c;
{
  for (;;)
    {
      switch (c)
        {
        case '\n':
          c = check_newline ();
          break;

        case ' ':
        case '\t':
        case '\f':
        case '\r':
        case '\v':
        case '\b':
          do
            c = getch ();
          while (c == ' ' || c == '\t');
          break;

        case '\\':
          c = getch ();
          if (c == '\n')
            lineno++;
          else
            error ("stray '\\' in program");
          c = getch ();
          break;

        default:
          return (c);
        }
    }
}



/* Make the token buffer longer, preserving the data in it.
   P should point to just beyond the last valid character in the old buffer.
   The value we return is a pointer to the new buffer
   at a place corresponding to P.  */

static char *
extend_token_buffer (p)
     const char *p;
{
  int offset = p - token_buffer;

  maxtoken = maxtoken * 2 + 10;
  token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2);

  return token_buffer + offset;
}
\f
static int
get_last_nonwhite_on_line ()
{
  register int c;

  /* Is this the last nonwhite stuff on the line?  */
  if (nextchar >= 0)
    c = nextchar, nextchar = -1;
  else
    c = getch ();

  while (c == ' ' || c == '\t')
    c = getch ();
  return c;
}

#if defined HANDLE_PRAGMA
/* Local versions of these macros, that can be passed as function pointers.  */
static int
pragma_getc ()
{
  int c;
      
  if (nextchar != EOF)
    {
      c = nextchar;
      nextchar = EOF;
    }
  else
    c = getch ();

  return c;
}

static void
pragma_ungetc (arg)
     int arg;
{
  yyungetc (arg, 0);
}
#endif /* HANDLE_PRAGMA */

/* At the beginning of a line, increment the line number
   and process any #-directive on this line.
   If the line is a #-directive, read the entire line and return a newline.
   Otherwise, return the line's first non-whitespace character.  */

int linemode;

static int
check_newline ()
{
  register int c;
  register int token;
  int saw_line = 0;

  /* Read first nonwhite char on the line.  Do this before incrementing the
     line number, in case we're at the end of saved text.  */

  do
    c = getch ();
  while (c == ' ' || c == '\t');

  lineno++;

  if (c != '#')
    {
      /* If not #, return it so caller will use it.  */
      return c;
    }

  /* Don't read beyond this line.  */
  linemode = 1;
  
  /* Read first nonwhite char after the `#'.  */

  do
    c = getch ();
  while (c == ' ' || c == '\t');

  /* If a letter follows, then if the word here is `line', skip
     it and ignore it; otherwise, ignore the line, with an error
     if the word isn't `pragma'.  */

  if (ISALPHA (c))
    {
      if (c == 'p')
        {
          if (getch () == 'r'
              && getch () == 'a'
              && getch () == 'g'
              && getch () == 'm'
              && getch () == 'a')
            {
              token = real_yylex ();
              if (token == IDENTIFIER
                  && TREE_CODE (yylval.ttype) == IDENTIFIER_NODE)
                {
                  /* If this is 1, we handled it; if it's -1, it was one we
                     wanted but had something wrong with it.  Only if it's
                     0 was it not handled.  */
                  if (handle_cp_pragma (IDENTIFIER_POINTER (yylval.ttype)))
                    goto skipline;
                }
              else if (token == END_OF_LINE)
                goto skipline;

#ifdef HANDLE_PRAGMA
              /* We invoke HANDLE_PRAGMA before HANDLE_GENERIC_PRAGMAS
                 (if both are defined), in order to give the back
                 end a chance to override the interpretation of
                 SYSV style pragmas.  */
              if (HANDLE_PRAGMA (pragma_getc, pragma_ungetc,
                                 IDENTIFIER_POINTER (yylval.ttype)))
                goto skipline;
#endif /* HANDLE_PRAGMA */
              
#ifdef HANDLE_GENERIC_PRAGMAS
              if (handle_generic_pragma (token))
                goto skipline;
#endif /* HANDLE_GENERIC_PRAGMAS */

              /* Issue a warning message if we have been asked to do so.
                 Ignoring unknown pragmas in system header file unless
                 an explcit -Wunknown-pragmas has been given. */
              if (warn_unknown_pragmas > 1
                  || (warn_unknown_pragmas && ! in_system_header))
                warning ("ignoring pragma: %s", token_buffer);
            }
          
          goto skipline;
        }
      else if (c == 'd')
        {
          if (getch () == 'e'
              && getch () == 'f'
              && getch () == 'i'
              && getch () == 'n'
              && getch () == 'e'
              && ((c = getch ()) == ' ' || c == '\t'))
            {
              debug_define (lineno, GET_DIRECTIVE_LINE ());
              goto skipline;
            }
        }
      else if (c == 'u')
        {
          if (getch () == 'n'
              && getch () == 'd'
              && getch () == 'e'
              && getch () == 'f'
              && ((c = getch ()) == ' ' || c == '\t'))
            {
              debug_undef (lineno, GET_DIRECTIVE_LINE ());
              goto skipline;
            }
        }
      else if (c == 'l')
        {
          if (getch () == 'i'
              && getch () == 'n'
              && getch () == 'e'
              && ((c = getch ()) == ' ' || c == '\t'))
            {
              saw_line = 1;
              goto linenum;
            }
        }
      else if (c == 'i')
        {
          if (getch () == 'd'
              && getch () == 'e'
              && getch () == 'n'
              && getch () == 't'
              && ((c = getch ()) == ' ' || c == '\t'))
            {
              /* #ident.  The pedantic warning is now in cccp.c.  */

              /* Here we have just seen `#ident '.
                 A string constant should follow.  */

              token = real_yylex ();
              if (token == END_OF_LINE)
                goto skipline;
              if (token != STRING
                  || TREE_CODE (yylval.ttype) != STRING_CST)
                {
                  error ("invalid #ident");
                  goto skipline;
                }

              if (! flag_no_ident)
                {
#ifdef ASM_OUTPUT_IDENT
                  ASM_OUTPUT_IDENT (asm_out_file,
                                    TREE_STRING_POINTER (yylval.ttype));
#endif
                }

              /* Skip the rest of this line.  */
              goto skipline;
            }
        }
      else if (c == 'n')
        {
          if (getch () == 'e'
              && getch () == 'w'
              && getch () == 'w'
              && getch () == 'o'
              && getch () == 'r'
              && getch () == 'l'
              && getch () == 'd'
              && ((c = getch ()) == ' ' || c == '\t'))
            {
              /* Used to test incremental compilation.  */
              sorry ("#pragma newworld");
              goto skipline;
            }
        }
      error ("undefined or invalid # directive");
      goto skipline;
    }

linenum:
  /* Here we have either `#line' or `# <nonletter>'.
     In either case, it should be a line number; a digit should follow.  */

  while (c == ' ' || c == '\t')
    c = getch ();

  /* If the # is the only nonwhite char on the line,
     just ignore it.  Check the new newline.  */
  if (c == EOF)
    goto skipline;

  /* Something follows the #; read a token.  */

  put_back (c);
  token = real_yylex ();

  if (token == CONSTANT
      && TREE_CODE (yylval.ttype) == INTEGER_CST)
    {
      int old_lineno = lineno;
      enum { act_none, act_push, act_pop } action = act_none;
      int entering_system_header = 0;
      int entering_c_header = 0;

      /* subtract one, because it is the following line that
         gets the specified number */

      int l = TREE_INT_CST_LOW (yylval.ttype) - 1;
      c = get_last_nonwhite_on_line ();
      if (c == EOF)
        {
          /* No more: store the line number and check following line.  */
          lineno = l;
          goto skipline;
        }
      put_back (c);

      /* More follows: it must be a string constant (filename).  */

      if (saw_line)
        {
          /* Don't treat \ as special if we are processing #line 1 "...".
             If you want it to be treated specially, use # 1 "...".  */
          ignore_escape_flag = 1;
        }

      /* Read the string constant.  */
      token = real_yylex ();

      ignore_escape_flag = 0;

      if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST)
        {
          error ("invalid #line");
          goto skipline;
        }

      /* Changing files again.  This means currently collected time
         is charged against header time, and body time starts back
         at 0.  */
      if (flag_detailed_statistics)
        {
          int this_time = my_get_run_time ();
          tree time_identifier = get_time_identifier (TREE_STRING_POINTER (yylval.ttype));
          header_time += this_time - body_time;
          TREE_INT_CST_LOW (TIME_IDENTIFIER_TIME (this_filename_time))
            += this_time - body_time;
          this_filename_time = time_identifier;
          body_time = this_time;
        }

      input_filename
        = (char *) permalloc (TREE_STRING_LENGTH (yylval.ttype) + 1);
      strcpy (input_filename, TREE_STRING_POINTER (yylval.ttype));
      lineno = l;
      GNU_xref_file (input_filename);
      
      if (main_input_filename == 0)
        {
          struct impl_files *ifiles = impl_file_chain;

          if (ifiles)
            {
              while (ifiles->next)
                ifiles = ifiles->next;
              ifiles->filename = file_name_nondirectory (input_filename);
            }

          main_input_filename = input_filename;
          if (write_virtuals == 3)
            {
              walk_globals (vtable_decl_p,
                            set_vardecl_interface_info,
                            /*data=*/0);
              walk_globals (vtype_decl_p,
                            set_typedecl_interface_info,
                            /*data=*/0);
            }
        }

      extract_interface_info ();

      c = get_last_nonwhite_on_line ();
      if (c == EOF)
        {
          /* Update the name in the top element of input_file_stack.  */
          if (input_file_stack)
            input_file_stack->name = input_filename;
        }
      else
        {
          put_back (c);

          token = real_yylex ();

          /* `1' after file name means entering new file.
             `2' after file name means just left a file.  */

          if (token == CONSTANT
              && TREE_CODE (yylval.ttype) == INTEGER_CST)
            {
              if (TREE_INT_CST_LOW (yylval.ttype) == 1)
                action = act_push;
              else if (TREE_INT_CST_LOW (yylval.ttype) == 2)
                action = act_pop;

              if (action)
                {
                  c = get_last_nonwhite_on_line ();
                  if (c != EOF)
                    {
                      put_back (c);
                      token = real_yylex ();
                    }
                }
            }

          /* `3' after file name means this is a system header file.  */

          if (token == CONSTANT
              && TREE_CODE (yylval.ttype) == INTEGER_CST
              && TREE_INT_CST_LOW (yylval.ttype) == 3)
            {
              entering_system_header = 1;

              c = get_last_nonwhite_on_line ();
              if (c != EOF)
                {
                  put_back (c);
                  token = real_yylex ();
                }
            }

          /* `4' after file name means this is a C header file.  */

          if (token == CONSTANT
              && TREE_CODE (yylval.ttype) == INTEGER_CST
              && TREE_INT_CST_LOW (yylval.ttype) == 4)
            {
              entering_c_header = 1;

              c = get_last_nonwhite_on_line ();
              if (c != EOF)
                {
                  put_back (c);
                  token = real_yylex ();
                }
            }

          /* Do the actions implied by the preceding numbers.  */

          if (action == act_push)
            {
              /* Pushing to a new file.  */
              struct file_stack *p;

              p = (struct file_stack *) xmalloc (sizeof (struct file_stack));
              input_file_stack->line = old_lineno;
              p->next = input_file_stack;
              p->name = input_filename;
              input_file_stack = p;
              input_file_stack_tick++;
              debug_start_source_file (input_filename);
              in_system_header = entering_system_header;
              if (c_header_level)
                ++c_header_level;
              else if (entering_c_header)
                {
                  c_header_level = 1;
                  ++pending_lang_change;
                }
            }
          else if (action == act_pop)
            {
              /* Popping out of a file.  */
              if (input_file_stack->next)
                {
                  struct file_stack *p;

                  if (c_header_level && --c_header_level == 0)
                    {
                      if (entering_c_header)
                        warning ("badly nested C headers from preprocessor");
                      --pending_lang_change;
                    }
                  in_system_header = entering_system_header;

                  p = input_file_stack;
                  input_file_stack = p->next;
                  free (p);
                  input_file_stack_tick++;
                  debug_end_source_file (input_file_stack->line);
                }
              else
                error ("#-lines for entering and leaving files don't match");
            }
          else
            in_system_header = entering_system_header;
        }

      /* If NEXTCHAR is not end of line, we don't care what it is.  */
      if (nextchar == EOF)
        c = EOF;
    }
  else
    error ("invalid #-line");

  /* skip the rest of this line.  */
 skipline:
  linemode = 0;
  end_of_file = 0;
  nextchar = -1;
  while ((c = getch ()) != EOF && c != '\n');
  return c;
}

void
do_pending_lang_change ()
{
  for (; pending_lang_change > 0; --pending_lang_change)
    push_lang_context (lang_name_c);
  for (; pending_lang_change < 0; ++pending_lang_change)
    pop_lang_context ();
}
\f
#define ENDFILE -1  /* token that represents end-of-file */

/* Read an escape sequence, returning its equivalent as a character,
   or store 1 in *ignore_ptr if it is backslash-newline.  */

static int
readescape (ignore_ptr)
     int *ignore_ptr;
{
  register int c = getch ();
  register int code;
  register unsigned count;
  unsigned firstdig = 0;
  int nonnull;

  switch (c)
    {
    case 'x':
      code = 0;
      count = 0;
      nonnull = 0;
      while (1)
        {
          c = getch ();
          if (! ISXDIGIT (c))
            {
              put_back (c);
              break;
            }
          code *= 16;
          if (c >= 'a' && c <= 'f')
            code += c - 'a' + 10;
          if (c >= 'A' && c <= 'F')
            code += c - 'A' + 10;
          if (c >= '0' && c <= '9')
            code += c - '0';
          if (code != 0 || count != 0)
            {
              if (count == 0)
                firstdig = code;
              count++;
            }
          nonnull = 1;
        }
      if (! nonnull)
        error ("\\x used with no following hex digits");
      else if (count == 0)
        /* Digits are all 0's.  Ok.  */
        ;
      else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node)
               || (count > 1
                   && (((unsigned)1 <<
                        (TYPE_PRECISION (integer_type_node) - (count - 1) * 4))
                       <= firstdig)))
        pedwarn ("hex escape out of range");
      return code;

    case '0':  case '1':  case '2':  case '3':  case '4':
    case '5':  case '6':  case '7':
      code = 0;
      count = 0;
      while ((c <= '7') && (c >= '0') && (count++ < 3))
        {
          code = (code * 8) + (c - '0');
          c = getch ();
        }
      put_back (c);
      return code;

    case '\\': case '\'': case '"':
      return c;

    case '\n':
      lineno++;
      *ignore_ptr = 1;
      return 0;

    case 'n':
      return TARGET_NEWLINE;

    case 't':
      return TARGET_TAB;

    case 'r':
      return TARGET_CR;

    case 'f':
      return TARGET_FF;

    case 'b':
      return TARGET_BS;

    case 'a':
      return TARGET_BELL;

    case 'v':
      return TARGET_VT;

    case 'e':
    case 'E':
      if (pedantic)
        pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c);
      return 033;

    case '?':
      return c;

      /* `\(', etc, are used at beginning of line to avoid confusing Emacs.  */
    case '(':
    case '{':
    case '[':
      /* `\%' is used to prevent SCCS from getting confused.  */
    case '%':
      if (pedantic)
        pedwarn ("unknown escape sequence `\\%c'", c);
      return c;
    }
  if (ISGRAPH (c))
    pedwarn ("unknown escape sequence `\\%c'", c);
  else
    pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c);
  return c;
}

/* Value is 1 (or 2) if we should try to make the next identifier look like
   a typename (when it may be a local variable or a class variable).
   Value is 0 if we treat this name in a default fashion.  */
int looking_for_typename;

#ifdef __GNUC__
__inline
#endif
int
identifier_type (decl)
     tree decl;
{
  tree t;
  if (TREE_CODE (decl) == TEMPLATE_DECL)
    {
      if (TREE_CODE (DECL_RESULT (decl)) == TYPE_DECL)
        return PTYPENAME;
      else if (looking_for_template) 
        return PFUNCNAME;
    }
  if (looking_for_template && really_overloaded_fn (decl))
    {
      /* See through a baselink.  */
      if (TREE_CODE (decl) == TREE_LIST)
        decl = TREE_VALUE (decl);

      for (t = decl; t != NULL_TREE; t = OVL_CHAIN (t))
        if (DECL_FUNCTION_TEMPLATE_P (OVL_FUNCTION (t))) 
          return PFUNCNAME;
    }
  if (TREE_CODE (decl) == NAMESPACE_DECL)
    return NSNAME;
  if (TREE_CODE (decl) != TYPE_DECL)
    return IDENTIFIER;
  if (DECL_ARTIFICIAL (decl) && TREE_TYPE (decl) == current_class_type)
    return SELFNAME;

  /* A constructor declarator for a template type will get here as an
     implicit typename, a TYPENAME_TYPE with a type.  */
  t = got_scope;
  if (t && TREE_CODE (t) == TYPENAME_TYPE)
    t = TREE_TYPE (t);
  decl = TREE_TYPE (decl);
  if (TREE_CODE (decl) == TYPENAME_TYPE)
    decl = TREE_TYPE (decl);
  if (t && t == decl)
    return SELFNAME;

  return TYPENAME;
}

void
see_typename ()
{
  /* Only types expected, not even namespaces. */
  looking_for_typename = 2;
  if (yychar < 0)
    if ((yychar = yylex ()) < 0) yychar = 0;
  looking_for_typename = 0;
  if (yychar == IDENTIFIER)
    {
      lastiddecl = lookup_name (yylval.ttype, -2);
      if (lastiddecl == 0)
        {
          if (flag_labels_ok)
            lastiddecl = IDENTIFIER_LABEL_VALUE (yylval.ttype);
        }
      else
        yychar = identifier_type (lastiddecl);
    }
}

/* Return true if d is in a global scope. */

static int
is_global (d)
  tree d;
{
  while (1)
    switch (TREE_CODE (d))
      {
      case ERROR_MARK:
        return 1;

      case OVERLOAD: d = OVL_FUNCTION (d); continue;
      case TREE_LIST: d = TREE_VALUE (d); continue;
      default:
        my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (d)) == 'd', 980629);

        /* A template parameter is not really global, even though it
           has no enclosing scope.  */
        if (DECL_TEMPLATE_PARM_P (d))
          return 0;

        d = CP_DECL_CONTEXT (d);
        return TREE_CODE (d) == NAMESPACE_DECL;
      }
}

tree
do_identifier (token, parsing, args)
     register tree token;
     int parsing;
     tree args;
{
  register tree id;
  int lexing = (parsing == 1);
  int in_call = (parsing == 2);

  if (! lexing || IDENTIFIER_OPNAME_P (token))
    id = lookup_name (token, 0);
  else
    id = lastiddecl;

  /* Scope class declarations before global
     declarations.  */
  if ((!id || is_global (id))
      && current_class_type != 0
      && TYPE_SIZE (current_class_type) == 0)
    {
      /* Could be from one of the base classes.  */
      tree field = lookup_field (current_class_type, token, 1, 0);
      if (field == 0)
        ;
      else if (field == error_mark_node)
        /* We have already generated the error message.
           But we still want to return this value.  */
        id = lookup_field (current_class_type, token, 0, 0);
      else if (TREE_CODE (field) == VAR_DECL
               || TREE_CODE (field) == CONST_DECL
               || TREE_CODE (field) == TEMPLATE_DECL)
        id = field;
      else if (TREE_CODE (field) != FIELD_DECL)
        my_friendly_abort (61);
      else
        {
          cp_error ("invalid use of member `%D'", field);
          id = error_mark_node;
          return id;
        }
    }

  /* Do Koenig lookup if appropriate (inside templates we build lookup
     expressions instead).  */
  if (args && !current_template_parms && (!id || is_global (id)))
    /* If we have arguments and we only found global names, do Koenig
       lookup. */
    id = lookup_arg_dependent (token, id, args);

  /* Remember that this name has been used in the class definition, as per
     [class.scope0] */
  if (id && parsing
      /* Avoid breaking if we get called for a default argument that
         refers to an overloaded method.  Eventually this will not be
         necessary, since default arguments shouldn't be parsed until
         after the class is complete.  (jason 3/12/97) */
      && TREE_CODE (id) != OVERLOAD)
    maybe_note_name_used_in_class (token, id);

  if (id == error_mark_node)
    {
      /* lookup_name quietly returns error_mark_node if we're parsing,
         as we don't want to complain about an identifier that ends up
         being used as a declarator.  So we call it again to get the error
         message.  */
      id = lookup_name (token, 0);
      return error_mark_node;
    }
      
  if (!id)
    {
      if (current_template_parms)
        return build_min_nt (LOOKUP_EXPR, token);
      else if (IDENTIFIER_OPNAME_P (token))
        {
          if (token != ansi_opname[ERROR_MARK])
            cp_error ("`%D' not defined", token);
          id = error_mark_node;
        }
      else if (in_call && ! flag_strict_prototype)
        {
          id = implicitly_declare (token);
        }
      else if (current_function_decl == 0)
        {
          cp_error ("`%D' was not declared in this scope", token);
          id = error_mark_node;
        }
      else
        {
          if (IDENTIFIER_NAMESPACE_VALUE (token) != error_mark_node
              || IDENTIFIER_ERROR_LOCUS (token) != current_function_decl)
            {
              static int undeclared_variable_notice;

              cp_error ("`%D' undeclared (first use this function)", token);

              if (! undeclared_variable_notice)
                {
                  error ("(Each undeclared identifier is reported only once");
                  error ("for each function it appears in.)");
                  undeclared_variable_notice = 1;
                }
            }
          id = error_mark_node;
          /* Prevent repeated error messages.  */
          SET_IDENTIFIER_NAMESPACE_VALUE (token, error_mark_node);
          SET_IDENTIFIER_ERROR_LOCUS (token, current_function_decl);
        }
    }

  if (TREE_CODE (id) == VAR_DECL && DECL_DEAD_FOR_LOCAL (id))
    {
      tree shadowed = DECL_SHADOWED_FOR_VAR (id);
      while (shadowed != NULL_TREE && TREE_CODE (shadowed) == VAR_DECL
             && DECL_DEAD_FOR_LOCAL (shadowed))
        shadowed = DECL_SHADOWED_FOR_VAR (shadowed);
      if (!shadowed)
        shadowed = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (id));
      if (shadowed)
        {
          if (!DECL_ERROR_REPORTED (id))
            {
              warning ("name lookup of `%s' changed",
                       IDENTIFIER_POINTER (token));
              cp_warning_at ("  matches this `%D' under current ANSI rules",
                             shadowed);
              cp_warning_at ("  matches this `%D' under old rules", id);
              DECL_ERROR_REPORTED (id) = 1;
            }
          id = shadowed;
        }
      else if (!DECL_ERROR_REPORTED (id))
        {
          static char msg[]
            = "name lookup of `%s' changed for new ANSI `for' scoping";
          DECL_ERROR_REPORTED (id) = 1;
          if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (id)))
            {
              error (msg, IDENTIFIER_POINTER (token));
              cp_error_at ("  cannot use obsolete binding at `%D' because it has a destructor", id);
              id = error_mark_node;
            }
          else
            {
              pedwarn (msg, IDENTIFIER_POINTER (token));
              cp_pedwarn_at ("  using obsolete binding at `%D'", id);
            }
        }
    }
  /* TREE_USED is set in `hack_identifier'.  */
  if (TREE_CODE (id) == CONST_DECL)
    {
      /* Check access.  */
      if (IDENTIFIER_CLASS_VALUE (token) == id)
        enforce_access (DECL_REAL_CONTEXT(id), id);
      if (!processing_template_decl || DECL_TEMPLATE_PARM_P (id))
        id = DECL_INITIAL (id);
    }
  else
    id = hack_identifier (id, token);

  /* We must look up dependent names when the template is
     instantiated, not while parsing it.  For now, we don't
     distinguish between dependent and independent names.  So, for
     example, we look up all overloaded functions at
     instantiation-time, even though in some cases we should just use
     the DECL we have here.  We also use LOOKUP_EXPRs to find things
     like local variables, rather than creating TEMPLATE_DECLs for the
     local variables and then finding matching instantiations.  */
  if (current_template_parms
      && (is_overloaded_fn (id) 
          /* If it's not going to be around at instantiation time, we
             look it up then.  This is a hack, and should go when we
             really get dependent/independent name lookup right.  */
          || !TREE_PERMANENT (id)
          /* Some local VAR_DECLs (such as those for local variables
             in member functions of local classes) are built on the
             permanent obstack.  */
          || (TREE_CODE (id) == VAR_DECL 
              && CP_DECL_CONTEXT (id)
              && TREE_CODE (CP_DECL_CONTEXT (id)) == FUNCTION_DECL)
          || TREE_CODE (id) == PARM_DECL
          || TREE_CODE (id) == RESULT_DECL
          || TREE_CODE (id) == USING_DECL))
    id = build_min_nt (LOOKUP_EXPR, token);
      
  return id;
}

tree
do_scoped_id (token, parsing)
     tree token;
     int parsing;
{
  tree id;
  /* during parsing, this is ::name. Otherwise, it is black magic. */
  if (parsing)
    {
      struct tree_binding _b;
      id = binding_init (&_b);
      if (!qualified_lookup_using_namespace (token, global_namespace, id, 0))
        id = NULL_TREE;
      else
        id = BINDING_VALUE (id);
    } 
  else
    id = IDENTIFIER_GLOBAL_VALUE (token);
  if (parsing && yychar == YYEMPTY)
    yychar = yylex ();
  if (! id)
    {
      if (processing_template_decl)
        {
          id = build_min_nt (LOOKUP_EXPR, token);
          LOOKUP_EXPR_GLOBAL (id) = 1;
          return id;
        }
      if (parsing && (yychar == '(' || yychar == LEFT_RIGHT)
          && ! flag_strict_prototype)
        id = implicitly_declare (token);
      else
        {
          if (IDENTIFIER_NAMESPACE_VALUE (token) != error_mark_node)
            cp_error ("`::%D' undeclared (first use here)", token);
          id = error_mark_node;
          /* Prevent repeated error messages.  */
          SET_IDENTIFIER_NAMESPACE_VALUE (token, error_mark_node);
        }
    }
  else
    {
      if (TREE_CODE (id) == ADDR_EXPR)
        mark_used (TREE_OPERAND (id, 0));
      else if (TREE_CODE (id) != OVERLOAD)
        mark_used (id);
    }
  if (TREE_CODE (id) == CONST_DECL && ! processing_template_decl)
    {
      /* XXX CHS - should we set TREE_USED of the constant? */
      id = DECL_INITIAL (id);
      /* This is to prevent an enum whose value is 0
         from being considered a null pointer constant.  */
      id = build1 (NOP_EXPR, TREE_TYPE (id), id);
      TREE_CONSTANT (id) = 1;
    }

  if (processing_template_decl)
    {
      if (is_overloaded_fn (id))
        {
          id = build_min_nt (LOOKUP_EXPR, token);
          LOOKUP_EXPR_GLOBAL (id) = 1;
          return id;
        }
      /* else just use the decl */
    }
  return convert_from_reference (id);
}

tree
identifier_typedecl_value (node)
     tree node;
{
  tree t, type;
  type = IDENTIFIER_TYPE_VALUE (node);
  if (type == NULL_TREE)
    return NULL_TREE;

  if (IDENTIFIER_BINDING (node))
    {
      t = IDENTIFIER_VALUE (node);
      if (t && TREE_CODE (t) == TYPE_DECL && TREE_TYPE (t) == type)
        return t;
    }
  if (IDENTIFIER_NAMESPACE_VALUE (node))
    {
      t = IDENTIFIER_NAMESPACE_VALUE (node);
      if (t && TREE_CODE (t) == TYPE_DECL && TREE_TYPE (t) == type)
        return t;
    }

  /* Will this one ever happen?  */
  if (TYPE_MAIN_DECL (type))
    return TYPE_MAIN_DECL (type);

  /* We used to do an internal error of 62 here, but instead we will
     handle the return of a null appropriately in the callers.  */
  return NULL_TREE;
}

struct pf_args 
{
  /* Input */
  /* I/O */
  char *p;
  int c;
  int imag;
  tree type;
  /* Output */
  REAL_VALUE_TYPE value;
};

static void
parse_float (data)
     PTR data;
{
  struct pf_args * args = (struct pf_args *) data;
  int fflag = 0, lflag = 0;
  /* Copy token_buffer now, while it has just the number
     and not the suffixes; once we add `f' or `i',
     REAL_VALUE_ATOF may not work any more.  */
  char *copy = (char *) alloca (args->p - token_buffer + 1);
  bcopy (token_buffer, copy, args->p - token_buffer + 1);
  
  while (1)
    {
      int lose = 0;
      
      /* Read the suffixes to choose a data type.  */
      switch (args->c)
        {
        case 'f': case 'F':
          if (fflag)
            error ("more than one `f' in numeric constant");
          fflag = 1;
          break;
          
        case 'l': case 'L':
          if (lflag)
            error ("more than one `l' in numeric constant");
          lflag = 1;
          break;
          
        case 'i': case 'I':
          if (args->imag)
            error ("more than one `i' or `j' in numeric constant");
          else if (pedantic)
            pedwarn ("ANSI C++ forbids imaginary numeric constants");
          args->imag = 1;
          break;
          
        default:
          lose = 1;
        }
      
      if (lose)
        break;
      
      if (args->p >= token_buffer + maxtoken - 3)
        args->p = extend_token_buffer (args->p);
      *(args->p++) = args->c;
      *(args->p) = 0;
      args->c = getch ();
    }
  
  /* The second argument, machine_mode, of REAL_VALUE_ATOF
     tells the desired precision of the binary result
     of decimal-to-binary conversion.  */
  
  if (fflag)
    {
      if (lflag)
        error ("both `f' and `l' in floating constant");
      
      args->type = float_type_node;
      args->value = REAL_VALUE_ATOF (copy, TYPE_MODE (args->type));
      /* A diagnostic is required here by some ANSI C testsuites.
         This is not pedwarn, become some people don't want
         an error for this.  */
      if (REAL_VALUE_ISINF (args->value) && pedantic)
        warning ("floating point number exceeds range of `float'");
    }
  else if (lflag)
    {
      args->type = long_double_type_node;
      args->value = REAL_VALUE_ATOF (copy, TYPE_MODE (args->type));
      if (REAL_VALUE_ISINF (args->value) && pedantic)
        warning ("floating point number exceeds range of `long double'");
    }
  else
    {
      args->value = REAL_VALUE_ATOF (copy, TYPE_MODE (args->type));
      if (REAL_VALUE_ISINF (args->value) && pedantic)
        warning ("floating point number exceeds range of `double'");
    }
}

int
real_yylex ()
{
  register int c;
  register int value;
  int wide_flag = 0;
  int dollar_seen = 0;
  int i;

  if (nextchar >= 0)
    c = nextchar, nextchar = -1;
  else
    c = getch ();

  /* Effectively do c = skip_white_space (c)
     but do it faster in the usual cases.  */
  while (1)
    switch (c)
      {
      case ' ':
      case '\t':
      case '\f':
      case '\v':
      case '\b':
        c = getch ();
        break;

      case '\r':
        /* Call skip_white_space so we can warn if appropriate.  */

      case '\n':
      case '/':
      case '\\':
        c = skip_white_space (c);
      default:
        goto found_nonwhite;
      }
 found_nonwhite:

  token_buffer[0] = c;
  token_buffer[1] = 0;

/*  yylloc.first_line = lineno; */

  switch (c)
    {
    case EOF:
      token_buffer[0] = '\0';
      end_of_file = 1;
      if (input_redirected ())
        value = END_OF_SAVED_INPUT;
      else if (linemode)
        value = END_OF_LINE;
      else
        value = ENDFILE;
      break;

    case '$':
      if (! dollars_in_ident)
        error ("`$' in identifier");
      else if (pedantic)
        pedwarn ("`$' in identifier");
      dollar_seen = 1;
      goto letter;

    case 'L':
      /* Capital L may start a wide-string or wide-character constant.  */
      {
        register int c = getch ();
        if (c == '\'')
          {
            wide_flag = 1;
            goto char_constant;
          }
        if (c == '"')
          {
            wide_flag = 1;
            goto string_constant;
          }
        put_back (c);
      }

    case 'A':  case 'B':  case 'C':  case 'D':  case 'E':
    case 'F':  case 'G':  case 'H':  case 'I':  case 'J':
    case 'K':             case 'M':  case 'N':  case 'O':
    case 'P':  case 'Q':  case 'R':  case 'S':  case 'T':
    case 'U':  case 'V':  case 'W':  case 'X':  case 'Y':
    case 'Z':
    case 'a':  case 'b':  case 'c':  case 'd':  case 'e':
    case 'f':  case 'g':  case 'h':  case 'i':  case 'j':
    case 'k':  case 'l':  case 'm':  case 'n':  case 'o':
    case 'p':  case 'q':  case 'r':  case 's':  case 't':
    case 'u':  case 'v':  case 'w':  case 'x':  case 'y':
    case 'z':
    case '_':
    letter:
      {
        register char *p;

        p = token_buffer;
        if (input == 0)
          {
            /* We know that `token_buffer' can hold at least on char,
               so we install C immediately.
               We may have to read the value in `putback_char', so call
               `getch' once.  */
            *p++ = c;
            c = getch ();

            /* Make this run fast.  We know that we are reading straight
               from FINPUT in this case (since identifiers cannot straddle
               input sources.  */
            while (ISALNUM (c) || (c == '_') || c == '$')
              {
                if (c == '$')
                  {
                    if (! dollars_in_ident)
                      error ("`$' in identifier");
                    else if (pedantic)
                      pedwarn ("`$' in identifier");
                  }

                if (p >= token_buffer + maxtoken)
                  p = extend_token_buffer (p);

                *p++ = c;
                c = getch ();
              }

            if (linemode && c == '\n')
              {
                put_back (c);
                c = EOF;
              }
          }
        else
          {
            /* We know that `token_buffer' can hold at least on char,
               so we install C immediately.  */
            *p++ = c;
            c = getch ();

            while (ISALNUM (c) || (c == '_') || c == '$')
              {
                if (c == '$')
                  {
                    if (! dollars_in_ident)
                      error ("`$' in identifier");
                    else if (pedantic)
                      pedwarn ("`$' in identifier");
                  }

                if (p >= token_buffer + maxtoken)
                  p = extend_token_buffer (p);

                *p++ = c;
                c = getch ();
              }
          }

        *p = 0;
        nextchar = c;

        value = IDENTIFIER;
        yylval.itype = 0;

      /* Try to recognize a keyword.  Uses minimum-perfect hash function */

        {
          register struct resword *ptr;

          if ((ptr = is_reserved_word (token_buffer, p - token_buffer)))
            {
              if (ptr->rid)
                {
                  tree old_ttype = ridpointers[(int) ptr->rid];

                  /* If this provides a type for us, then revert lexical
                     state to standard state.  */
                  if (TREE_CODE (old_ttype) == IDENTIFIER_NODE
                      && IDENTIFIER_GLOBAL_VALUE (old_ttype) != 0
                      && TREE_CODE (IDENTIFIER_GLOBAL_VALUE (old_ttype)) == TYPE_DECL)
                    looking_for_typename = 0;
                  else if (ptr->token == AGGR || ptr->token == ENUM)
                    looking_for_typename = 2;

                  /* Check if this is a language-type declaration.
                     Just glimpse the next non-white character.  */
                  nextchar = skip_white_space (nextchar);
                  if (nextchar == '"')
                    {
                      /* We are looking at a string.  Complain
                         if the token before the string is no `extern'.
                         
                         Could cheat some memory by placing this string
                         on the temporary_, instead of the saveable_
                         obstack.  */

                      if (ptr->rid != RID_EXTERN)
                        error ("invalid modifier `%s' for language string",
                               ptr->name);
                      real_yylex ();
                      value = EXTERN_LANG_STRING;
                      yylval.ttype = get_identifier (TREE_STRING_POINTER (yylval.ttype));
                      break;
                    }
                  if (ptr->token == VISSPEC)
                    {
                      switch (ptr->rid)
                        {
                        case RID_PUBLIC:
                          yylval.ttype = access_public_node;
                          break;
                        case RID_PRIVATE:
                          yylval.ttype = access_private_node;
                          break;
                        case RID_PROTECTED:
                          yylval.ttype = access_protected_node;
                          break;
                        default:
                          my_friendly_abort (63);
                        }
                    }
                  else
                    yylval.ttype = old_ttype;
                }
              else if (ptr->token == EQCOMPARE)
                {
                  yylval.code = NE_EXPR;
                  token_buffer[0] = '!';
                  token_buffer[1] = '=';
                  token_buffer[2] = 0;
                }
              else if (ptr->token == ASSIGN)
                {
                  if (strcmp ("and_eq", token_buffer) == 0)
                    {
                      yylval.code = BIT_AND_EXPR;
                      token_buffer[0] = '&';
                    }
                  else if (strcmp ("or_eq", token_buffer) == 0)
                    {
                      yylval.code = BIT_IOR_EXPR;
                      token_buffer[0] = '|';
                    }
                  else if (strcmp ("xor_eq", token_buffer) == 0)
                    {
                      yylval.code = BIT_XOR_EXPR;
                      token_buffer[0] = '^';
                    }
                  token_buffer[1] = '=';
                  token_buffer[2] = 0;
                }
              else if (ptr->token == '&')
                {
                  yylval.code = BIT_AND_EXPR;
                  token_buffer[0] = '&';
                  token_buffer[1] = 0;
                }
              else if (ptr->token == '|')
                {
                  yylval.code = BIT_IOR_EXPR;
                  token_buffer[0] = '|';
                  token_buffer[1] = 0;
                }
              else if (ptr->token == '^')
                {
                  yylval.code = BIT_XOR_EXPR;
                  token_buffer[0] = '^';
                  token_buffer[1] = 0;
                }

              value = (int) ptr->token;
            }
        }

        /* If we did not find a keyword, look for an identifier
           (or a typename).  */

        if (value == IDENTIFIER || value == TYPESPEC)
          GNU_xref_ref (current_function_decl, token_buffer);

        if (value == IDENTIFIER)
          {
            register tree tmp = get_identifier (token_buffer);

#if !defined(VMS) && defined(JOINER)
            /* Make sure that user does not collide with our internal
               naming scheme.  */
            if (JOINER == '$'
                && dollar_seen
                && (THIS_NAME_P (tmp)
                    || VPTR_NAME_P (tmp)
                    || DESTRUCTOR_NAME_P (tmp)
                    || VTABLE_NAME_P (tmp)
                    || TEMP_NAME_P (tmp)
                    || ANON_AGGRNAME_P (tmp)
                    || ANON_PARMNAME_P (tmp)))
              warning ("identifier name `%s' conflicts with GNU C++ internal naming strategy",
                       token_buffer);
#endif

            yylval.ttype = tmp;
          }
        if (value == NEW && ! global_bindings_p ())
          {
            value = NEW;
            goto done;
          }
      }
      break;

    case '.':
      {
        register int c1 = getch ();
        token_buffer[0] = c;
        token_buffer[1] = c1;
        if (c1 == '*')
          {
            value = DOT_STAR;
            token_buffer[2] = 0;
            goto done;
          }
        if (c1 == '.')
          {
            c1 = getch ();
            if (c1 == '.')
              {
                token_buffer[2] = c1;
                token_buffer[3] = 0;
                value = ELLIPSIS;
                goto done;
              }
            error ("parse error at `..'");
          }
        if (ISDIGIT (c1))
          {
            put_back (c1);
            goto resume_numerical_scan;
          }
        nextchar = c1;
        value = '.';
        token_buffer[1] = 0;
        goto done;
      }
    case '0':  case '1':
        /* Optimize for most frequent case.  */
      {
        register int c1 = getch ();
        if (! ISALNUM (c1) && c1 != '.')
          {
            /* Terminate string.  */
            token_buffer[0] = c;
            token_buffer[1] = 0;
            if (c == '0')
              yylval.ttype = integer_zero_node;
            else
              yylval.ttype = integer_one_node;
            nextchar = c1;
            value = CONSTANT;
            goto done;
          }
        put_back (c1);
      }
      /* fall through...  */
                          case '2':  case '3':  case '4':
    case '5':  case '6':  case '7':  case '8':  case '9':
    resume_numerical_scan:
      {
        register char *p;
        int base = 10;
        int count = 0;
        int largest_digit = 0;
        int numdigits = 0;
        /* for multi-precision arithmetic,
           we actually store only HOST_BITS_PER_CHAR bits in each part.
           The number of parts is chosen so as to be sufficient to hold
           the enough bits to fit into the two HOST_WIDE_INTs that contain
           the integer value (this is always at least as many bits as are
           in a target `long long' value, but may be wider).  */
#define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2 + 2)
        int parts[TOTAL_PARTS];
        int overflow = 0;

        enum anon1 { NOT_FLOAT, AFTER_POINT, TOO_MANY_POINTS} floatflag
          = NOT_FLOAT;

        for (count = 0; count < TOTAL_PARTS; count++)
          parts[count] = 0;

        p = token_buffer;
        *p++ = c;

        if (c == '0')
          {
            *p++ = (c = getch ());
            if ((c == 'x') || (c == 'X'))
              {
                base = 16;
                *p++ = (c = getch ());
              }
            /* Leading 0 forces octal unless the 0 is the only digit.  */
            else if (c >= '0' && c <= '9')
              {
                base = 8;
                numdigits++;
              }
            else
              numdigits++;
          }

        /* Read all the digits-and-decimal-points.  */

        while (c == '.'
               || (ISALNUM (c) && (c != 'l') && (c != 'L')
                   && (c != 'u') && (c != 'U')
                   && c != 'i' && c != 'I' && c != 'j' && c != 'J'
                   && (floatflag == NOT_FLOAT || ((c != 'f') && (c != 'F')))))
          {
            if (c == '.')
              {
                if (base == 16)
                  error ("floating constant may not be in radix 16");
                if (floatflag == TOO_MANY_POINTS)
                  /* We have already emitted an error.  Don't need another.  */
                  ;
                else if (floatflag == AFTER_POINT)
                  {
                    error ("malformed floating constant");
                    floatflag = TOO_MANY_POINTS;
                    /* Avoid another error from atof by forcing all characters
                       from here on to be ignored.  */
                    p[-1] = '\0';
                  }
                else
                  floatflag = AFTER_POINT;

                base = 10;
                *p++ = c = getch ();
                /* Accept '.' as the start of a floating-point number
                   only when it is followed by a digit.
                   Otherwise, unread the following non-digit
                   and use the '.' as a structural token.  */
                if (p == token_buffer + 2 && !ISDIGIT (c))
                  {
                    if (c == '.')
                      {
                        c = getch ();
                        if (c == '.')
                          {
                            *p++ = '.';
                            *p = '\0';
                            value = ELLIPSIS;
                            goto done;
                          }
                        error ("parse error at `..'");
                      }
                    nextchar = c;
                    token_buffer[1] = '\0';
                    value = '.';
                    goto done;
                  }
              }
            else
              {
                /* It is not a decimal point.
                   It should be a digit (perhaps a hex digit).  */

                if (ISDIGIT (c))
                  {
                    c = c - '0';
                  }
                else if (base <= 10)
                  {
                    if (c == 'e' || c == 'E')
                      {
                        base = 10;
                        floatflag = AFTER_POINT;
                        break;   /* start of exponent */
                      }
                    error ("nondigits in number and not hexadecimal");
                    c = 0;
                  }
                else if (c >= 'a')
                  {
                    c = c - 'a' + 10;
                  }
                else
                  {
                    c = c - 'A' + 10;
                  }
                if (c >= largest_digit)
                  largest_digit = c;
                numdigits++;

                for (count = 0; count < TOTAL_PARTS; count++)
                  {
                    parts[count] *= base;
                    if (count)
                      {
                        parts[count]
                          += (parts[count-1] >> HOST_BITS_PER_CHAR);
                        parts[count-1]
                          &= (1 << HOST_BITS_PER_CHAR) - 1;
                      }
                    else
                      parts[0] += c;
                  }

                /* If the extra highest-order part ever gets anything in it,
                   the number is certainly too big.  */
                if (parts[TOTAL_PARTS - 1] != 0)
                  overflow = 1;

                if (p >= token_buffer + maxtoken - 3)
                  p = extend_token_buffer (p);
                *p++ = (c = getch ());
              }
          }

        if (numdigits == 0)
          error ("numeric constant with no digits");

        if (largest_digit >= base)
          error ("numeric constant contains digits beyond the radix");

        /* Remove terminating char from the token buffer and delimit the string */
        *--p = 0;

        if (floatflag != NOT_FLOAT)
          {
            tree type = double_type_node;
            int exceeds_double = 0;
            int imag = 0;
            REAL_VALUE_TYPE value;
            struct pf_args args;

            /* Read explicit exponent if any, and put it in tokenbuf.  */

            if ((c == 'e') || (c == 'E'))
              {
                if (p >= token_buffer + maxtoken - 3)
                  p = extend_token_buffer (p);
                *p++ = c;
                c = getch ();
                if ((c == '+') || (c == '-'))
                  {
                    *p++ = c;
                    c = getch ();
                  }
                if (! ISDIGIT (c))
                  error ("floating constant exponent has no digits");
                while (ISDIGIT (c))
                  {
                    if (p >= token_buffer + maxtoken - 3)
                      p = extend_token_buffer (p);
                    *p++ = c;
                    c = getch ();
                  }
              }

            *p = 0;
            errno = 0;

            /* Setup input for parse_float() */
            args.p = p;
            args.c = c;
            args.imag = imag;
            args.type = type;
            
            /* Convert string to a double, checking for overflow.  */
            if (do_float_handler (parse_float, (PTR) &args))
              {
                /* Receive output from parse_float() */
                value = args.value;
              }
            else
              {
                /* We got an exception from parse_float() */
                error ("floating constant out of range");
                value = dconst0;
              }

            /* Receive output from parse_float() */
            p = args.p;
            c = args.c;
            imag = args.imag;
            type = args.type;
            
#ifdef ERANGE
            if (errno == ERANGE && pedantic)
              {
                /* ERANGE is also reported for underflow,
                   so test the value to distinguish overflow from that.  */
                if (REAL_VALUES_LESS (dconst1, value)
                    || REAL_VALUES_LESS (value, dconstm1))
                  {
                    pedwarn ("floating point number exceeds range of `%s'",
                             IDENTIFIER_POINTER (TYPE_IDENTIFIER (type)));
                    exceeds_double = 1;
                  }
              }
#endif

            /* If the result is not a number, assume it must have been
               due to some error message above, so silently convert
               it to a zero.  */
            if (REAL_VALUE_ISNAN (value))
              value = dconst0;

            /* Create a node with determined type and value.  */
            if (imag)
              yylval.ttype = build_complex (NULL_TREE,
                                            cp_convert (type, integer_zero_node),
                                            build_real (type, value));
            else
              yylval.ttype = build_real (type, value);
          }
        else
          {
            tree type;
            HOST_WIDE_INT high, low;
            int spec_unsigned = 0;
            int spec_long = 0;
            int spec_long_long = 0;
            int spec_imag = 0;
            int warn;

            while (1)
              {
                if (c == 'u' || c == 'U')
                  {
                    if (spec_unsigned)
                      error ("two `u's in integer constant");
                    spec_unsigned = 1;
                  }
                else if (c == 'l' || c == 'L')
                  {
                    if (spec_long)
                      {
                        if (spec_long_long)
                          error ("three `l's in integer constant");
                        else if (pedantic && ! in_system_header && warn_long_long)
                          pedwarn ("ANSI C++ forbids long long integer constants");
                        spec_long_long = 1;
                      }
                    spec_long = 1;
                  }
                else if (c == 'i' || c == 'j' || c == 'I' || c == 'J')
                  {
                    if (spec_imag)
                      error ("more than one `i' or `j' in numeric constant");
                    else if (pedantic)
                      pedwarn ("ANSI C++ forbids imaginary numeric constants");
                    spec_imag = 1;
                  }
                else
                  break;
                if (p >= token_buffer + maxtoken - 3)
                  p = extend_token_buffer (p);
                *p++ = c;
                c = getch ();
              }

            /* If it won't fit in the host's representation for integers,
               then pedwarn. */

            warn = overflow;
            if (warn)
              pedwarn ("integer constant is too large for this configuration of the compiler - truncated to %d bits", HOST_BITS_PER_WIDE_INT * 2);

            /* This is simplified by the fact that our constant
               is always positive.  */
            high = low = 0;

            for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++)
              {
                high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT
                                                    / HOST_BITS_PER_CHAR)]
                         << (i * HOST_BITS_PER_CHAR));
                low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR);
              }
            
            
            yylval.ttype = build_int_2 (low, high);
            TREE_TYPE (yylval.ttype) = long_long_unsigned_type_node;

            /* Calculate the ANSI type.  */
            if (!spec_long && !spec_unsigned
                && int_fits_type_p (yylval.ttype, integer_type_node))
              type = integer_type_node;
            else if (!spec_long && (base != 10 || spec_unsigned)
                     && int_fits_type_p (yylval.ttype, unsigned_type_node))
              /* Nondecimal constants try unsigned even in traditional C.  */
              type = unsigned_type_node;
            else if (!spec_unsigned && !spec_long_long
                     && int_fits_type_p (yylval.ttype, long_integer_type_node))
              type = long_integer_type_node;
            else if (! spec_long_long)
              type = long_unsigned_type_node;
            else if (! spec_unsigned
                     /* Verify value does not overflow into sign bit.  */
                     && TREE_INT_CST_HIGH (yylval.ttype) >= 0
                     && int_fits_type_p (yylval.ttype,
                                         long_long_integer_type_node))
              type = long_long_integer_type_node;
            else
              type = long_long_unsigned_type_node;

            if (!int_fits_type_p (yylval.ttype, type) && !warn)
              pedwarn ("integer constant is larger than the maximum value for its type");

            if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type))
              warning ("decimal integer constant is so large that it is unsigned");

            if (spec_imag)
              {
                if (TYPE_PRECISION (type)
                    <= TYPE_PRECISION (integer_type_node))
                  yylval.ttype
                    = build_complex (NULL_TREE, integer_zero_node,
                                     cp_convert (integer_type_node,
                                                 yylval.ttype));
                else
                  error ("complex integer constant is too wide for `__complex int'");
              }
            else
              TREE_TYPE (yylval.ttype) = type;
          }

        put_back (c);
        *p = 0;

        value = CONSTANT; break;
      }

    case '\'':
    char_constant:
      {
        register int result = 0;
        register int num_chars = 0;
        int chars_seen = 0;
        unsigned width = TYPE_PRECISION (char_type_node);
        int max_chars;
#ifdef MULTIBYTE_CHARS
        int longest_char = local_mb_cur_max ();
        (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
#endif

        max_chars = TYPE_PRECISION (integer_type_node) / width;
        if (wide_flag)
          width = WCHAR_TYPE_SIZE;

        while (1)
          {
          tryagain:
            c = getch ();

            if (c == '\'' || c == EOF)
              break;

            ++chars_seen;
            if (c == '\\')
              {
                int ignore = 0;
                c = readescape (&ignore);
                if (ignore)
                  goto tryagain;
                if (width < HOST_BITS_PER_INT
                    && (unsigned) c >= ((unsigned)1 << width))
                  pedwarn ("escape sequence out of range for character");
#ifdef MAP_CHARACTER
                if (ISPRINT (c))
                  c = MAP_CHARACTER (c);
#endif
              }
            else if (c == '\n')
              {
                if (pedantic)
                  pedwarn ("ANSI C forbids newline in character constant");
                lineno++;
              }
            else
              {
#ifdef MULTIBYTE_CHARS
                wchar_t wc;
                int i;
                int char_len = -1;
                for (i = 1; i <= longest_char; ++i)
                  {
                    if (i > maxtoken - 4)
                      extend_token_buffer (token_buffer);

                    token_buffer[i] = c;
                    char_len = local_mbtowc (& wc,
                                             token_buffer + 1,
                                             i);
                    if (char_len != -1)
                      break;
                    c = getch ();
                  }
                if (char_len > 1)
                  {
                    /* mbtowc sometimes needs an extra char before accepting */
                    if (char_len < i)
                      put_back (c);
                    if (! wide_flag)
                      {
                        /* Merge character into result; ignore excess chars.  */
                        for (i = 1; i <= char_len; ++i)
                          {
                            if (i > max_chars)
                              break;
                            if (width < HOST_BITS_PER_INT)
                              result = (result << width)
                                | (token_buffer[i]
                                   & ((1 << width) - 1));
                            else
                              result = token_buffer[i];
                          }
                        num_chars += char_len;
                        goto tryagain;
                      }
                    c = wc;
                  }
                else
                  {
                    if (char_len == -1)
                      {
                        warning ("Ignoring invalid multibyte character");
                        /* Replace all but the first byte.  */
                        for (--i; i > 1; --i)
                          put_back (token_buffer[i]);
                        wc = token_buffer[1];
                      }
#ifdef MAP_CHARACTER
                      c = MAP_CHARACTER (wc);
#else
                      c = wc;
#endif
                  }
#else /* ! MULTIBYTE_CHARS */
#ifdef MAP_CHARACTER
                c = MAP_CHARACTER (c);
#endif
#endif /* ! MULTIBYTE_CHARS */
              }

            if (wide_flag)
              {
                if (chars_seen == 1) /* only keep the first one */
                  result = c;
                goto tryagain;
              }

            /* Merge character into result; ignore excess chars.  */
            num_chars++;
            if (num_chars < max_chars + 1)
              {
                if (width < HOST_BITS_PER_INT)
                  result = (result << width) | (c & ((1 << width) - 1));
                else
                  result = c;
              }
          }

        if (c != '\'')
          error ("malformatted character constant");
        else if (chars_seen == 0)
          error ("empty character constant");
        else if (num_chars > max_chars)
          {
            num_chars = max_chars;
            error ("character constant too long");
          }
        else if (chars_seen != 1 && warn_multichar)
          warning ("multi-character character constant");

        /* If char type is signed, sign-extend the constant.  */
        if (! wide_flag)
          {
            int num_bits = num_chars * width;
            if (num_bits == 0)
              /* We already got an error; avoid invalid shift.  */
              yylval.ttype = build_int_2 (0, 0);
            else if (TREE_UNSIGNED (char_type_node)
                     || ((result >> (num_bits - 1)) & 1) == 0)
              yylval.ttype
                = build_int_2 (result & (~(unsigned HOST_WIDE_INT) 0
                                         >> (HOST_BITS_PER_WIDE_INT - num_bits)),
                               0);
            else
              yylval.ttype
                = build_int_2 (result | ~(~(unsigned HOST_WIDE_INT) 0
                                          >> (HOST_BITS_PER_WIDE_INT - num_bits)),
                               -1);
            if (chars_seen <= 1)
              TREE_TYPE (yylval.ttype) = char_type_node;
            else
              TREE_TYPE (yylval.ttype) = integer_type_node;
          }
        else
          {
            yylval.ttype = build_int_2 (result, 0);
            TREE_TYPE (yylval.ttype) = wchar_type_node;
          }

        value = CONSTANT;
        break;
      }

    case '"':
    string_constant:
      {
        register char *p;
        unsigned width = wide_flag ? WCHAR_TYPE_SIZE
                                   : TYPE_PRECISION (char_type_node);
#ifdef MULTIBYTE_CHARS
        int longest_char = local_mb_cur_max ();
        (void) local_mbtowc (NULL_PTR, NULL_PTR, 0);
#endif

        c = getch ();
        p = token_buffer + 1;

        while (c != '"' && c >= 0)
          {
            /* ignore_escape_flag is set for reading the filename in #line.  */
            if (!ignore_escape_flag && c == '\\')
              {
                int ignore = 0;
                c = readescape (&ignore);
                if (ignore)
                  goto skipnewline;
                if (width < HOST_BITS_PER_INT
                    && (unsigned) c >= ((unsigned)1 << width))
                  warning ("escape sequence out of range for character");
              }
            else if (c == '\n')
              {
                if (pedantic)
                  pedwarn ("ANSI C++ forbids newline in string constant");
                lineno++;
              }
            else
              {
#ifdef MULTIBYTE_CHARS
                wchar_t wc;
                int i;
                int char_len = -1;
                for (i = 0; i < longest_char; ++i)
                  {
                    if (p + i >= token_buffer + maxtoken)
                      p = extend_token_buffer (p);
                    p[i] = c;

                    char_len = local_mbtowc (& wc, p, i + 1);
                    if (char_len != -1)
                      break;
                    c = getch ();
                  }
                if (char_len == -1)
                  {
                    warning ("Ignoring invalid multibyte character");
                    /* Replace all except the first byte.  */
                    put_back (c);
                    for (--i; i > 0; --i)
                      put_back (p[i]);
                    char_len = 1;
                  }
                /* mbtowc sometimes needs an extra char before accepting */
                if (char_len <= i)
                  put_back (c);
                if (! wide_flag)
                  {
                    p += (i + 1);
                    c = getch ();
                    continue;
                  }
                c = wc;
#endif /* MULTIBYTE_CHARS */
              }

            /* Add this single character into the buffer either as a wchar_t
               or as a single byte.  */
            if (wide_flag)
              {
                unsigned width = TYPE_PRECISION (char_type_node);
                unsigned bytemask = (1 << width) - 1;
                int byte;

                if (p + WCHAR_BYTES > token_buffer + maxtoken)
                  p = extend_token_buffer (p);

                for (byte = 0; byte < WCHAR_BYTES; ++byte)
                  {
                    int value;
                    if (byte >= (int) sizeof(c))
                      value = 0;
                    else
                      value = (c >> (byte * width)) & bytemask;
                    if (BYTES_BIG_ENDIAN)
                      p[WCHAR_BYTES - byte - 1] = value;
                    else
                      p[byte] = value;
                  }
                p += WCHAR_BYTES;
              }
            else
              {
                if (p >= token_buffer + maxtoken)
                  p = extend_token_buffer (p);
                *p++ = c;
              }

          skipnewline:
            c = getch ();
            if (c == EOF) {
                error ("Unterminated string");
                break;
            }
          }

        /* Terminate the string value, either with a single byte zero
           or with a wide zero.  */
        if (wide_flag)
          {
            if (p + WCHAR_BYTES > token_buffer + maxtoken)
              p = extend_token_buffer (p);
            bzero (p, WCHAR_BYTES);
            p += WCHAR_BYTES;
          }
        else
          {
            if (p >= token_buffer + maxtoken)
              p = extend_token_buffer (p);
            *p++ = 0;
          }

        /* We have read the entire constant.
           Construct a STRING_CST for the result.  */

        if (processing_template_decl)
          push_obstacks (&permanent_obstack, &permanent_obstack);
        yylval.ttype = build_string (p - (token_buffer + 1), token_buffer + 1);
        if (processing_template_decl)
          pop_obstacks ();

        if (wide_flag)
          TREE_TYPE (yylval.ttype) = wchar_array_type_node;
        else
          TREE_TYPE (yylval.ttype) = char_array_type_node;

        value = STRING; break;
      }

    case '+':
    case '-':
    case '&':
    case '|':
    case '<':
    case '>':
    case '*':
    case '/':
    case '%':
    case '^':
    case '!':
    case '=':
      {
        register int c1;

      combine:

        switch (c)
          {
          case '+':
            yylval.code = PLUS_EXPR; break;
          case '-':
            yylval.code = MINUS_EXPR; break;
          case '&':
            yylval.code = BIT_AND_EXPR; break;
          case '|':
            yylval.code = BIT_IOR_EXPR; break;
          case '*':
            yylval.code = MULT_EXPR; break;
          case '/':
            yylval.code = TRUNC_DIV_EXPR; break;
          case '%':
            yylval.code = TRUNC_MOD_EXPR; break;
          case '^':
            yylval.code = BIT_XOR_EXPR; break;
          case LSHIFT:
            yylval.code = LSHIFT_EXPR; break;
          case RSHIFT:
            yylval.code = RSHIFT_EXPR; break;
          case '<':
            yylval.code = LT_EXPR; break;
          case '>':
            yylval.code = GT_EXPR; break;
          }

        token_buffer[1] = c1 = getch ();
        token_buffer[2] = 0;

        if (c1 == '=')
          {
            switch (c)
              {
              case '<':
                value = ARITHCOMPARE; yylval.code = LE_EXPR; goto done;
              case '>':
                value = ARITHCOMPARE; yylval.code = GE_EXPR; goto done;
              case '!':
                value = EQCOMPARE; yylval.code = NE_EXPR; goto done;
              case '=':
                value = EQCOMPARE; yylval.code = EQ_EXPR; goto done;
              }
            value = ASSIGN; goto done;
          }
        else if (c == c1)
          switch (c)
            {
            case '+':
              value = PLUSPLUS; goto done;
            case '-':
              value = MINUSMINUS; goto done;
            case '&':
              value = ANDAND; goto done;
            case '|':
              value = OROR; goto done;
            case '<':
              c = LSHIFT;
              goto combine;
            case '>':
              c = RSHIFT;
              goto combine;
            }
        else if ((c == '-') && (c1 == '>'))
          {
            nextchar = getch ();
            if (nextchar == '*')
              {
                nextchar = -1;
                value = POINTSAT_STAR;
              }
            else
              value = POINTSAT;
            goto done;
          }
        else if (c1 == '?' && (c == '<' || c == '>'))
          {
            token_buffer[3] = 0;

            c1 = getch ();
            yylval.code = (c == '<' ? MIN_EXPR : MAX_EXPR);
            if (c1 == '=')
              {
                /* <?= or >?= expression.  */
                token_buffer[2] = c1;
                value = ASSIGN;
              }
            else
              {
                value = MIN_MAX;
                nextchar = c1;
              }
            if (pedantic)
              pedwarn ("use of `operator %s' is not standard C++",
                       token_buffer);
            goto done;
          }
        /* digraphs */
        else if (c == '<' && c1 == '%')
          { value = '{'; goto done; }
        else if (c == '<' && c1 == ':')
          { value = '['; goto done; }
        else if (c == '%' && c1 == '>')
          { value = '}'; goto done; }
        else if (c == '%' && c1 == ':')
          { value = '#'; goto done; }

        nextchar = c1;
        token_buffer[1] = 0;

        value = c;
        goto done;
      }

    case ':':
      c = getch ();
      if (c == ':')
        {
          token_buffer[1] = ':';
          token_buffer[2] = '\0';
          value = SCOPE;
          yylval.itype = 1;
        }
      else if (c == '>')
        {
          value = ']';
          goto done;
        }
      else
        {
          nextchar = c;
          value = ':';
        }
      break;

    case 0:
      /* Don't make yyparse think this is eof.  */
      value = 1;
      break;

    case '(':
      /* try, weakly, to handle casts to pointers to functions.  */
      nextchar = skip_white_space (getch ());
      if (nextchar == '*')
        {
          int next_c = skip_white_space (getch ());
          if (next_c == ')')
            {
              nextchar = -1;
              yylval.ttype = build1 (INDIRECT_REF, 0, 0);
              value = PAREN_STAR_PAREN;
            }
          else
            {
              put_back (next_c);
              value = c;
            }
        }
      else if (nextchar == ')')
        {
          nextchar = -1;
          yylval.ttype = NULL_TREE;
          value = LEFT_RIGHT;
        }
      else value = c;
      break;

    default:
      value = c;
    }

done:
/*  yylloc.last_line = lineno; */
#ifdef GATHER_STATISTICS
#ifdef REDUCE_LENGTH
  token_count[value] += 1;
#endif
#endif

  return value;
}

int
is_rid (t)
     tree t;
{
  return !!is_reserved_word (IDENTIFIER_POINTER (t), IDENTIFIER_LENGTH (t));
}

#ifdef GATHER_STATISTICS
/* The original for tree_node_kind is in the toplevel tree.c; changes there
   need to be brought into here, unless this were actually put into a header
   instead.  */
/* Statistics-gathering stuff.  */
typedef enum
{
  d_kind,
  t_kind,
  b_kind,
  s_kind,
  r_kind,
  e_kind,
  c_kind,
  id_kind,
  op_id_kind,
  perm_list_kind,
  temp_list_kind,
  vec_kind,
  x_kind,
  lang_decl,
  lang_type,
  all_kinds
} tree_node_kind;

extern int tree_node_counts[];
extern int tree_node_sizes[];
#endif

/* Place to save freed lang_decls which were allocated on the
   permanent_obstack.  @@ Not currently used.  */
tree free_lang_decl_chain;

tree
build_lang_decl (code, name, type)
     enum tree_code code;
     tree name;
     tree type;
{
  register tree t = build_decl (code, name, type);
  retrofit_lang_decl (t);
  return t;
}

/* Add DECL_LANG_SPECIFIC info to T.  Called from build_lang_decl
   and pushdecl (for functions generated by the backend).  */

void
retrofit_lang_decl (t)
     tree t;
{
  struct obstack *obstack = current_obstack;
  register int i = sizeof (struct lang_decl) / sizeof (int);
  register int *pi;

  if (! TREE_PERMANENT (t))
    obstack = saveable_obstack;
  else
    /* Could be that saveable is permanent and current is not.  */
    obstack = &permanent_obstack;

  if (free_lang_decl_chain && obstack == &permanent_obstack)
    {
      pi = (int *)free_lang_decl_chain;
      free_lang_decl_chain = TREE_CHAIN (free_lang_decl_chain);
    }
  else
    pi = (int *) obstack_alloc (obstack, sizeof (struct lang_decl));

  while (i > 0)
    pi[--i] = 0;

  DECL_LANG_SPECIFIC (t) = (struct lang_decl *) pi;
  LANG_DECL_PERMANENT ((struct lang_decl *) pi)
    = obstack == &permanent_obstack;
  my_friendly_assert (LANG_DECL_PERMANENT ((struct lang_decl *) pi)
          == TREE_PERMANENT  (t), 234);
  DECL_MAIN_VARIANT (t) = t;
  if (current_lang_name == lang_name_cplusplus)
    DECL_LANGUAGE (t) = lang_cplusplus;
  else if (current_lang_name == lang_name_c)
    DECL_LANGUAGE (t) = lang_c;
  else if (current_lang_name == lang_name_java)
    DECL_LANGUAGE (t) = lang_java;
  else my_friendly_abort (64);

#if 0 /* not yet, should get fixed properly later */
  if (code == TYPE_DECL)
    {
      tree id;
      id = get_identifier (build_overload_name (type, 1, 1));
      DECL_ASSEMBLER_NAME (t) = id;
    }

#endif
#ifdef GATHER_STATISTICS
  tree_node_counts[(int)lang_decl] += 1;
  tree_node_sizes[(int)lang_decl] += sizeof (struct lang_decl);
#endif
}

tree
build_lang_field_decl (code, name, type)
     enum tree_code code;
     tree name;
     tree type;
{
  extern struct obstack *current_obstack, *saveable_obstack;
  register tree t = build_decl (code, name, type);
  struct obstack *obstack = current_obstack;
  register int i = sizeof (struct lang_decl_flags) / sizeof (int);
  register int *pi;
#if 0 /* not yet, should get fixed properly later */

  if (code == TYPE_DECL)
    {
      tree id;
      id = get_identifier (build_overload_name (type, 1, 1));
      DECL_ASSEMBLER_NAME (t) = id;
    }
#endif

  if (! TREE_PERMANENT (t))
    obstack = saveable_obstack;
  else
    my_friendly_assert (obstack == &permanent_obstack, 235);

  pi = (int *) obstack_alloc (obstack, sizeof (struct lang_decl_flags));
  while (i > 0)
    pi[--i] = 0;

  DECL_LANG_SPECIFIC (t) = (struct lang_decl *) pi;
  return t;
}

void
copy_lang_decl (node)
     tree node;
{
  int size;
  int *pi;

  if (! DECL_LANG_SPECIFIC (node))
    return;

  if (TREE_CODE (node) == FIELD_DECL)
    size = sizeof (struct lang_decl_flags);
  else
    size = sizeof (struct lang_decl);
  pi = (int *)obstack_alloc (&permanent_obstack, size);
  bcopy ((char *)DECL_LANG_SPECIFIC (node), (char *)pi, size);
  DECL_LANG_SPECIFIC (node) = (struct lang_decl *)pi;
}

tree
make_lang_type (code)
     enum tree_code code;
{
  extern struct obstack *current_obstack, *saveable_obstack;
  register tree t = make_node (code);

  /* Set up some flags that give proper default behavior.  */
  if (IS_AGGR_TYPE_CODE (code))
    {
      struct obstack *obstack = current_obstack;
      struct lang_type *pi;

      SET_IS_AGGR_TYPE (t, 1);

      if (! TREE_PERMANENT (t))
        obstack = saveable_obstack;
      else
        my_friendly_assert (obstack == &permanent_obstack, 236);

      pi = (struct lang_type *) obstack_alloc (obstack, sizeof (struct lang_type));
      bzero ((char *) pi, (int) sizeof (struct lang_type));

      TYPE_LANG_SPECIFIC (t) = pi;
      SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown);
      CLASSTYPE_INTERFACE_ONLY (t) = interface_only;

      /* Make sure this is laid out, for ease of use later.  In the
         presence of parse errors, the normal was of assuring this
         might not ever get executed, so we lay it out *immediately*.  */
      build_pointer_type (t);

#ifdef GATHER_STATISTICS
      tree_node_counts[(int)lang_type] += 1;
      tree_node_sizes[(int)lang_type] += sizeof (struct lang_type);
#endif
    }
  else
    /* We use TYPE_ALIAS_SET for the CLASSTYPE_MARKED bits.  But,
       TYPE_ALIAS_SET is initialized to -1 by default, so we must
       clear it here.  */
    TYPE_ALIAS_SET (t) = 0;

  /* We need to allocate a TYPE_BINFO even for TEMPALTE_TYPE_PARMs
     since they can be virtual base types, and we then need a
     canonical binfo for them.  Ideally, this would be done lazily for
     all types.  */
  if (IS_AGGR_TYPE_CODE (code) || code == TEMPLATE_TYPE_PARM)
    TYPE_BINFO (t) = make_binfo (integer_zero_node, t, NULL_TREE, NULL_TREE);

  return t;
}

void
dump_time_statistics ()
{
  register tree prev = 0, decl, next;
  int this_time = my_get_run_time ();
  TREE_INT_CST_LOW (TIME_IDENTIFIER_TIME (this_filename_time))
    += this_time - body_time;

  fprintf (stderr, "\n******\n");
  print_time ("header files (total)", header_time);
  print_time ("main file (total)", this_time - body_time);
  fprintf (stderr, "ratio = %g : 1\n",
           (double)header_time / (double)(this_time - body_time));
  fprintf (stderr, "\n******\n");

  for (decl = filename_times; decl; decl = next)
    {
      next = IDENTIFIER_GLOBAL_VALUE (decl);
      SET_IDENTIFIER_GLOBAL_VALUE (decl, prev);
      prev = decl;
    }

  for (decl = prev; decl; decl = IDENTIFIER_GLOBAL_VALUE (decl))
    print_time (IDENTIFIER_POINTER (decl),
                TREE_INT_CST_LOW (TIME_IDENTIFIER_TIME (decl)));
}

void
compiler_error VPROTO ((const char *msg, ...))
{
#ifndef ANSI_PROTOTYPES
  const char *msg;
#endif
  char buf[1024];
  va_list ap;
  
  VA_START (ap, msg);
  
#ifndef ANSI_PROTOTYPES
  msg = va_arg (ap, const char *);
#endif

  vsprintf (buf, msg, ap);
  error_with_file_and_line (input_filename, lineno, "%s (compiler error)", buf);
}
\f
void
yyerror (string)
     const char *string;
{
  extern int end_of_file;
  char buf[200];

  strcpy (buf, string);

  /* We can't print string and character constants well
     because the token_buffer contains the result of processing escapes.  */
  if (end_of_file)
    strcat (buf, input_redirected ()
            ? " at end of saved text"
            : " at end of input");
  else if (token_buffer[0] == 0)
    strcat (buf, " at null character");
  else if (token_buffer[0] == '"')
    strcat (buf, " before string constant");
  else if (token_buffer[0] == '\'')
    strcat (buf, " before character constant");
  else if (!ISGRAPH ((unsigned char)token_buffer[0]))
    sprintf (buf + strlen (buf), " before character 0%o",
             (unsigned char) token_buffer[0]);
  else
    strcat (buf, " before `%s'");

  error (buf, token_buffer);
}
\f
static int
handle_cp_pragma (pname)
     const char *pname;
{
  register int token;

  if (! strcmp (pname, "vtable"))
    {
      extern tree pending_vtables;

      /* More follows: it must be a string constant (class name).  */
      token = real_yylex ();
      if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST)
        {
          error ("invalid #pragma vtable");
          return -1;
        }

      if (write_virtuals != 2)
        {
          warning ("use `+e2' option to enable #pragma vtable");
          return -1;
        }
      pending_vtables
        = perm_tree_cons (NULL_TREE,
                          get_identifier (TREE_STRING_POINTER (yylval.ttype)),
                          pending_vtables);
      token = real_yylex ();
      if (token != END_OF_LINE)
        warning ("trailing characters ignored");
      return 1;
    }
  else if (! strcmp (pname, "unit"))
    {
      /* More follows: it must be a string constant (unit name).  */
      token = real_yylex ();
      if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST)
        {
          error ("invalid #pragma unit");
          return -1;
        }
      token = real_yylex ();
      if (token != END_OF_LINE)
        warning ("trailing characters ignored");
      return 1;
    }
  else if (! strcmp (pname, "interface"))
    {
      tree fileinfo 
        = TIME_IDENTIFIER_FILEINFO (get_time_identifier (input_filename));
      char *main_filename = input_filename;

      main_filename = file_name_nondirectory (main_filename);

      token = real_yylex ();
      
      if (token != END_OF_LINE)
        {
          if (token != STRING
              || TREE_CODE (yylval.ttype) != STRING_CST)
            {
              error ("invalid `#pragma interface'");
              return -1;
            }
          main_filename = TREE_STRING_POINTER (yylval.ttype);
          token = real_yylex ();
        }

      if (token != END_OF_LINE)
        warning ("garbage after `#pragma interface' ignored");

      write_virtuals = 3;

      if (impl_file_chain == 0)
        {
          /* If this is zero at this point, then we are
             auto-implementing.  */
          if (main_input_filename == 0)
            main_input_filename = input_filename;

#ifdef AUTO_IMPLEMENT
          filename = file_name_nondirectory (main_input_filename);
          fi = get_time_identifier (filename);
          fi = TIME_IDENTIFIER_FILEINFO (fi);
          TREE_INT_CST_LOW (fi) = 0;
          TREE_INT_CST_HIGH (fi) = 1;
          /* Get default.  */
          impl_file_chain = (struct impl_files *)permalloc (sizeof (struct impl_files));
          impl_file_chain->filename = filename;
          impl_file_chain->next = 0;
#endif
        }

      interface_only = interface_strcmp (main_filename);
#ifdef MULTIPLE_SYMBOL_SPACES
      if (! interface_only)
        interface_unknown = 0;
#else /* MULTIPLE_SYMBOL_SPACES */
      interface_unknown = 0;
#endif /* MULTIPLE_SYMBOL_SPACES */
      TREE_INT_CST_LOW (fileinfo) = interface_only;
      TREE_INT_CST_HIGH (fileinfo) = interface_unknown;

      return 1;
    }
  else if (! strcmp (pname, "implementation"))
    {
      tree fileinfo 
        = TIME_IDENTIFIER_FILEINFO (get_time_identifier (input_filename));
      char *main_filename = main_input_filename ? main_input_filename : input_filename;

      main_filename = file_name_nondirectory (main_filename);
      token = real_yylex ();
      if (token != END_OF_LINE)
        {
          if (token != STRING
              || TREE_CODE (yylval.ttype) != STRING_CST)
            {
              error ("invalid `#pragma implementation'");
              return -1;
            }
          main_filename = TREE_STRING_POINTER (yylval.ttype);
          token = real_yylex ();
        }

      if (token != END_OF_LINE)
        warning ("garbage after `#pragma implementation' ignored");

      if (write_virtuals == 3)
        {
          struct impl_files *ifiles = impl_file_chain;
          while (ifiles)
            {
              if (! strcmp (ifiles->filename, main_filename))
                break;
              ifiles = ifiles->next;
            }
          if (ifiles == 0)
            {
              ifiles = (struct impl_files*) permalloc (sizeof (struct impl_files));
              ifiles->filename = main_filename;
              ifiles->next = impl_file_chain;
              impl_file_chain = ifiles;
            }
        }
      else if ((main_input_filename != 0
                && ! strcmp (main_input_filename, input_filename))
               || ! strcmp (input_filename, main_filename))
        {
          write_virtuals = 3;
          if (impl_file_chain == 0)
            {
              impl_file_chain = (struct impl_files*) permalloc (sizeof (struct impl_files));
              impl_file_chain->filename = main_filename;
              impl_file_chain->next = 0;
            }
        }
      else
        error ("`#pragma implementation' can only appear at top-level");
      interface_only = 0;
#if 1
      /* We make this non-zero so that we infer decl linkage
         in the impl file only for variables first declared
         in the interface file.  */
      interface_unknown = 1;
#else
      /* We make this zero so that templates in the impl
         file will be emitted properly.  */
      interface_unknown = 0;
#endif
      TREE_INT_CST_LOW (fileinfo) = interface_only;
      TREE_INT_CST_HIGH (fileinfo) = interface_unknown;

      return 1;
    }

  return 0;
}

/* Return the type-qualifier corresponding to the identifier given by
   RID.  */

int
cp_type_qual_from_rid (rid)
     tree rid;
{
  if (rid == ridpointers[(int) RID_CONST])
    return TYPE_QUAL_CONST;
  else if (rid == ridpointers[(int) RID_VOLATILE])
    return TYPE_QUAL_VOLATILE;
  else if (rid == ridpointers[(int) RID_RESTRICT])
    return TYPE_QUAL_RESTRICT;

  my_friendly_abort (0);
  return TYPE_UNQUALIFIED;
}

\f
#ifdef HANDLE_GENERIC_PRAGMAS

/* Handle a #pragma directive.  TOKEN is the type of the word following
   the #pragma directive on the line.  Process the entire input line and
   return non-zero iff the directive successfully parsed.  */

/* This function has to be in this file, in order to get at
   the token types.  */

static int
handle_generic_pragma (token)
     register int token;
{
  for (;;)
    {
      switch (token)
        {
        case IDENTIFIER:
        case TYPENAME:
        case STRING:
        case CONSTANT:
          handle_pragma_token (token_buffer, yylval.ttype);
          break;

        case LEFT_RIGHT:
          handle_pragma_token ("(", NULL_TREE);
          handle_pragma_token (")", NULL_TREE);
          break;

        case END_OF_LINE:
          return handle_pragma_token (NULL_PTR, NULL_TREE);

        default:
          handle_pragma_token (token_buffer, NULL_TREE);
        }
      
      token = real_yylex ();
    }
}
#endif /* HANDLE_GENERIC_PRAGMAS */