gcc/cp/error.c

   1 /* Call-backs for C++ error reporting.
   2    This code is non-reentrant.
   3    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002,
   4    2003, 2004 Free Software Foundation, Inc.
   5    This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "tree.h"
  27 #include "cp-tree.h"
  28 #include "real.h"
  29 #include "toplev.h"
  30 #include "flags.h"
  31 #include "diagnostic.h"
  32 #include "langhooks-def.h"
  33 #include "cxx-pretty-print.h"
  34
  35 #define pp_template_argument_list_start(PP) \
  36    pp_non_consecutive_character (PP, '<')
  37 #define pp_template_argument_list_end(PP)  \
  38    pp_non_consecutive_character (PP, '>')
  39 #define pp_separate_with_comma(PP) pp_string (PP, ", ")
  40
  41 /* The global buffer where we dump everything.  It is there only for
  42    transitional purpose.  It is expected, in the near future, to be
  43    completely removed.  */
  44 static cxx_pretty_printer scratch_pretty_printer;
  45 #define cxx_pp (&scratch_pretty_printer)
  46
  47 # define NEXT_CODE(T) (TREE_CODE (TREE_TYPE (T)))
  48
  49 #define reinit_global_formatting_buffer() \
  50    pp_clear_output_area (scratch_buffer)
  51
  52 static const char *args_to_string (tree, int);
  53 static const char *assop_to_string (enum tree_code);
  54 static const char *code_to_string (enum tree_code);
  55 static const char *cv_to_string (tree, int);
  56 static const char *decl_to_string (tree, int);
  57 static const char *expr_to_string (tree);
  58 static const char *fndecl_to_string (tree, int);
  59 static const char *op_to_string (enum tree_code);
  60 static const char *parm_to_string (int);
  61 static const char *type_to_string (tree, int);
  62
  63 static void dump_type (tree, int);
  64 static void dump_typename (tree, int);
  65 static void dump_simple_decl (tree, tree, int);
  66 static void dump_decl (tree, int);
  67 static void dump_template_decl (tree, int);
  68 static void dump_function_decl (tree, int);
  69 static void dump_expr (tree, int);
  70 static void dump_unary_op (const char *, tree, int);
  71 static void dump_binary_op (const char *, tree, int);
  72 static void dump_aggr_type (tree, int);
  73 static void dump_type_prefix (tree, int);
  74 static void dump_type_suffix (tree, int);
  75 static void dump_function_name (tree, int);
  76 static void dump_expr_list (tree, int);
  77 static void dump_global_iord (tree);
  78 static void dump_parameters (tree, int);
  79 static void dump_exception_spec (tree, int);
  80 static const char *class_key_or_enum (tree);
  81 static void dump_template_argument (tree, int);
  82 static void dump_template_argument_list (tree, int);
  83 static void dump_template_parameter (tree, int);
  84 static void dump_template_bindings (tree, tree);
  85 static void dump_scope (tree, int);
  86 static void dump_template_parms (tree, int, int);
  87
  88 static const char *function_category (tree);
  89 static void maybe_print_instantiation_context (diagnostic_context *);
  90 static void print_instantiation_full_context (diagnostic_context *);
  91 static void print_instantiation_partial_context (diagnostic_context *,
  92                                                  tree, location_t);
  93 static void cp_diagnostic_starter (diagnostic_context *, diagnostic_info *);
  94 static void cp_diagnostic_finalizer (diagnostic_context *, diagnostic_info *);
  95 static void cp_print_error_function (diagnostic_context *, diagnostic_info *);
  96
  97 static bool cp_printer (pretty_printer *, text_info *);
  98 static void pp_non_consecutive_character (cxx_pretty_printer *, int);
  99 static tree locate_error (const char *, va_list);
 100 static location_t location_of (tree);
 101
 102 void
 103 init_error (void)
 104 {
 105   diagnostic_starter (global_dc) = cp_diagnostic_starter;
 106   diagnostic_finalizer (global_dc) = cp_diagnostic_finalizer;
 107   diagnostic_format_decoder (global_dc) = cp_printer;
 108
 109   pp_construct (pp_base (cxx_pp), NULL, 0);
 110   pp_cxx_pretty_printer_init (cxx_pp);
 111 }
 112
 113 /* Dump a scope, if deemed necessary.  */
 114
 115 static void
 116 dump_scope (tree scope, int flags)
 117 {
 118   int f = ~TFF_RETURN_TYPE & (flags & (TFF_SCOPE | TFF_CHASE_TYPEDEF));
 119
 120   if (scope == NULL_TREE)
 121     return;
 122
 123   if (TREE_CODE (scope) == NAMESPACE_DECL)
 124     {
 125       if (scope != global_namespace)
 126         {
 127           dump_decl (scope, f);
 128           pp_colon_colon (cxx_pp);
 129         }
 130     }
 131   else if (AGGREGATE_TYPE_P (scope))
 132     {
 133       dump_type (scope, f);
 134       pp_colon_colon (cxx_pp);
 135     }
 136   else if ((flags & TFF_SCOPE) && TREE_CODE (scope) == FUNCTION_DECL)
 137     {
 138       dump_function_decl (scope, f);
 139       pp_colon_colon (cxx_pp);
 140     }
 141 }
 142
 143 /* Dump the template ARGument under control of FLAGS.  */
 144
 145 static void
 146 dump_template_argument (tree arg, int flags)
 147 {
 148   if (TYPE_P (arg) || TREE_CODE (arg) == TEMPLATE_DECL)
 149     dump_type (arg, flags & ~TFF_CLASS_KEY_OR_ENUM);
 150   else
 151     dump_expr (arg, (flags | TFF_EXPR_IN_PARENS) & ~TFF_CLASS_KEY_OR_ENUM);
 152 }
 153
 154 /* Dump a template-argument-list ARGS (always a TREE_VEC) under control
 155    of FLAGS.  */
 156
 157 static void
 158 dump_template_argument_list (tree args, int flags)
 159 {
 160   int n = TREE_VEC_LENGTH (args);
 161   int need_comma = 0;
 162   int i;
 163
 164   for (i = 0; i< n; ++i)
 165     {
 166       if (need_comma)
 167         pp_separate_with_comma (cxx_pp);
 168       dump_template_argument (TREE_VEC_ELT (args, i), flags);
 169       need_comma = 1;
 170     }
 171 }
 172
 173 /* Dump a template parameter PARM (a TREE_LIST) under control of FLAGS.  */
 174
 175 static void
 176 dump_template_parameter (tree parm, int flags)
 177 {
 178   tree p = TREE_VALUE (parm);
 179   tree a = TREE_PURPOSE (parm);
 180
 181   if (TREE_CODE (p) == TYPE_DECL)
 182     {
 183       if (flags & TFF_DECL_SPECIFIERS)
 184         {
 185           pp_identifier (cxx_pp, "class");
 186           if (DECL_NAME (p))
 187             {
 188               pp_space (cxx_pp);
 189               pp_tree_identifier (cxx_pp, DECL_NAME (p));
 190             }
 191         }
 192       else if (DECL_NAME (p))
 193         pp_tree_identifier (cxx_pp, DECL_NAME (p));
 194       else
 195         pp_cxx_canonical_template_parameter (cxx_pp, TREE_TYPE (p));
 196     }
 197   else
 198     dump_decl (p, flags | TFF_DECL_SPECIFIERS);
 199
 200   if ((flags & TFF_FUNCTION_DEFAULT_ARGUMENTS) && a != NULL_TREE)
 201     {
 202       pp_string (cxx_pp, " = ");
 203       if (TREE_CODE (p) == TYPE_DECL || TREE_CODE (p) == TEMPLATE_DECL)
 204         dump_type (a, flags & ~TFF_CHASE_TYPEDEF);
 205       else
 206         dump_expr (a, flags | TFF_EXPR_IN_PARENS);
 207     }
 208 }
 209
 210 /* Dump, under control of FLAGS, a template-parameter-list binding.
 211    PARMS is a TREE_LIST of TREE_VEC of TREE_LIST and ARGS is a
 212    TREE_VEC.  */
 213
 214 static void
 215 dump_template_bindings (tree parms, tree args)
 216 {
 217   int need_comma = 0;
 218
 219   while (parms)
 220     {
 221       tree p = TREE_VALUE (parms);
 222       int lvl = TMPL_PARMS_DEPTH (parms);
 223       int arg_idx = 0;
 224       int i;
 225
 226       for (i = 0; i < TREE_VEC_LENGTH (p); ++i)
 227         {
 228           tree arg = NULL_TREE;
 229
 230           /* Don't crash if we had an invalid argument list.  */
 231           if (TMPL_ARGS_DEPTH (args) >= lvl)
 232             {
 233               tree lvl_args = TMPL_ARGS_LEVEL (args, lvl);
 234               if (NUM_TMPL_ARGS (lvl_args) > arg_idx)
 235                 arg = TREE_VEC_ELT (lvl_args, arg_idx);
 236             }
 237
 238           if (need_comma)
 239             pp_separate_with_comma (cxx_pp);
 240           dump_template_parameter (TREE_VEC_ELT (p, i), TFF_PLAIN_IDENTIFIER);
 241           pp_string (cxx_pp, " = ");
 242           if (arg)
 243             dump_template_argument (arg, TFF_PLAIN_IDENTIFIER);
 244           else
 245             pp_identifier (cxx_pp, "<missing>");
 246
 247           ++arg_idx;
 248           need_comma = 1;
 249         }
 250
 251       parms = TREE_CHAIN (parms);
 252     }
 253 }
 254
 255 /* Dump a human-readable equivalent of TYPE.  FLAGS controls the
 256    format.  */
 257
 258 static void
 259 dump_type (tree t, int flags)
 260 {
 261   if (t == NULL_TREE)
 262     return;
 263
 264   if (TYPE_PTRMEMFUNC_P (t))
 265     goto offset_type;
 266
 267   switch (TREE_CODE (t))
 268     {
 269     case UNKNOWN_TYPE:
 270       pp_identifier (cxx_pp, "<unknown type>");
 271       break;
 272
 273     case TREE_LIST:
 274       /* A list of function parms.  */
 275       dump_parameters (t, flags);
 276       break;
 277
 278     case IDENTIFIER_NODE:
 279       pp_tree_identifier (cxx_pp, t);
 280       break;
 281
 282     case TREE_VEC:
 283       dump_type (BINFO_TYPE (t), flags);
 284       break;
 285
 286     case RECORD_TYPE:
 287     case UNION_TYPE:
 288     case ENUMERAL_TYPE:
 289       dump_aggr_type (t, flags);
 290       break;
 291
 292     case TYPE_DECL:
 293       if (flags & TFF_CHASE_TYPEDEF)
 294         {
 295           dump_type (DECL_ORIGINAL_TYPE (t)
 296                      ? DECL_ORIGINAL_TYPE (t) : TREE_TYPE (t), flags);
 297           break;
 298         }
 299       /* Else fall through.  */
 300
 301     case TEMPLATE_DECL:
 302     case NAMESPACE_DECL:
 303       dump_decl (t, flags & ~TFF_DECL_SPECIFIERS);
 304       break;
 305
 306     case INTEGER_TYPE:
 307     case REAL_TYPE:
 308     case VOID_TYPE:
 309     case BOOLEAN_TYPE:
 310     case COMPLEX_TYPE:
 311     case VECTOR_TYPE:
 312       pp_base (cxx_pp)->padding = pp_none;
 313       pp_type_specifier_seq (cxx_pp, t);
 314       break;
 315
 316     case TEMPLATE_TEMPLATE_PARM:
 317       /* For parameters inside template signature.  */
 318       if (TYPE_IDENTIFIER (t))
 319         pp_tree_identifier (cxx_pp, TYPE_IDENTIFIER (t));
 320       else
 321         pp_cxx_canonical_template_parameter (cxx_pp, t);
 322       break;
 323
 324     case BOUND_TEMPLATE_TEMPLATE_PARM:
 325       {
 326         tree args = TYPE_TI_ARGS (t);
 327         pp_tree_identifier (cxx_pp, TYPE_IDENTIFIER (t));
 328         pp_template_argument_list_start (cxx_pp);
 329         dump_template_argument_list (args, flags);
 330         pp_template_argument_list_end (cxx_pp);
 331       }
 332       break;
 333
 334     case TEMPLATE_TYPE_PARM:
 335       pp_cxx_cv_qualifier_seq (cxx_pp, t);
 336       if (TYPE_IDENTIFIER (t))
 337         pp_tree_identifier (cxx_pp, TYPE_IDENTIFIER (t));
 338       else
 339         pp_cxx_canonical_template_parameter
 340           (cxx_pp, TEMPLATE_TYPE_PARM_INDEX (t));
 341       break;
 342
 343       /* This is not always necessary for pointers and such, but doing this
 344          reduces code size.  */
 345     case ARRAY_TYPE:
 346     case POINTER_TYPE:
 347     case REFERENCE_TYPE:
 348     case OFFSET_TYPE:
 349     offset_type:
 350     case FUNCTION_TYPE:
 351     case METHOD_TYPE:
 352     {
 353       dump_type_prefix (t, flags);
 354       dump_type_suffix (t, flags);
 355       break;
 356     }
 357     case TYPENAME_TYPE:
 358       pp_cxx_cv_qualifier_seq (cxx_pp, t);
 359       pp_string (cxx_pp, "typename ");
 360       dump_typename (t, flags);
 361       break;
 362
 363     case UNBOUND_CLASS_TEMPLATE:
 364       dump_type (TYPE_CONTEXT (t), flags);
 365       pp_colon_colon (cxx_pp);
 366       pp_identifier (cxx_pp, "template ");
 367       dump_type (DECL_NAME (TYPE_NAME (t)), flags);
 368       break;
 369
 370     case TYPEOF_TYPE:
 371       pp_string (cxx_pp, "__typeof (");
 372       dump_expr (TYPEOF_TYPE_EXPR (t), flags & ~TFF_EXPR_IN_PARENS);
 373       pp_right_paren (cxx_pp);
 374       break;
 375
 376     default:
 377       pp_unsupported_tree (cxx_pp, t);
 378       /* Fall through to error.  */
 379
 380     case ERROR_MARK:
 381       pp_identifier (cxx_pp, "<type error>");
 382       break;
 383     }
 384 }
 385
 386 /* Dump a TYPENAME_TYPE. We need to notice when the context is itself
 387    a TYPENAME_TYPE.  */
 388
 389 static void
 390 dump_typename (tree t, int flags)
 391 {
 392   tree ctx = TYPE_CONTEXT (t);
 393
 394   if (TREE_CODE (ctx) == TYPENAME_TYPE)
 395     dump_typename (ctx, flags);
 396   else
 397     dump_type (ctx, flags & ~TFF_CLASS_KEY_OR_ENUM);
 398   pp_colon_colon (cxx_pp);
 399   dump_decl (TYPENAME_TYPE_FULLNAME (t), flags);
 400 }
 401
 402 /* Return the name of the supplied aggregate, or enumeral type.  */
 403
 404 static const char *
 405 class_key_or_enum (tree t)
 406 {
 407   if (TREE_CODE (t) == ENUMERAL_TYPE)
 408     return "enum";
 409   else if (TREE_CODE (t) == UNION_TYPE)
 410     return "union";
 411   else if (TYPE_LANG_SPECIFIC (t) && CLASSTYPE_DECLARED_CLASS (t))
 412     return "class";
 413   else
 414     return "struct";
 415 }
 416
 417 /* Print out a class declaration T under the control of FLAGS,
 418    in the form `class foo'.  */
 419
 420 static void
 421 dump_aggr_type (tree t, int flags)
 422 {
 423   tree name;
 424   const char *variety = class_key_or_enum (t);
 425   int typdef = 0;
 426   int tmplate = 0;
 427
 428   pp_cxx_cv_qualifier_seq (cxx_pp, t);
 429
 430   if (flags & TFF_CLASS_KEY_OR_ENUM)
 431     {
 432       pp_identifier (cxx_pp, variety);
 433       pp_space (cxx_pp);
 434     }
 435
 436   if (flags & TFF_CHASE_TYPEDEF)
 437     t = TYPE_MAIN_VARIANT (t);
 438
 439   name = TYPE_NAME (t);
 440
 441   if (name)
 442     {
 443       typdef = !DECL_ARTIFICIAL (name);
 444       tmplate = !typdef && TREE_CODE (t) != ENUMERAL_TYPE
 445                 && TYPE_LANG_SPECIFIC (t) && CLASSTYPE_TEMPLATE_INFO (t)
 446                 && (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
 447                     || TREE_CODE (CLASSTYPE_TI_TEMPLATE (t)) != TEMPLATE_DECL
 448                     || DECL_TEMPLATE_SPECIALIZATION (CLASSTYPE_TI_TEMPLATE (t))
 449                     || PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)));
 450       dump_scope (CP_DECL_CONTEXT (name), flags | TFF_SCOPE);
 451       if (tmplate)
 452         {
 453           /* Because the template names are mangled, we have to locate
 454              the most general template, and use that name.  */
 455           tree tpl = CLASSTYPE_TI_TEMPLATE (t);
 456
 457           while (DECL_TEMPLATE_INFO (tpl))
 458             tpl = DECL_TI_TEMPLATE (tpl);
 459           name = tpl;
 460         }
 461       name = DECL_NAME (name);
 462     }
 463
 464   if (name == 0 || ANON_AGGRNAME_P (name))
 465     {
 466       if (flags & TFF_CLASS_KEY_OR_ENUM)
 467         pp_identifier (cxx_pp, "<anonymous>");
 468       else
 469         pp_printf (pp_base (cxx_pp), "<anonymous %s>", variety);
 470     }
 471   else
 472     pp_tree_identifier (cxx_pp, name);
 473   if (tmplate)
 474     dump_template_parms (TYPE_TEMPLATE_INFO (t),
 475                          !CLASSTYPE_USE_TEMPLATE (t),
 476                          flags & ~TFF_TEMPLATE_HEADER);
 477 }
 478
 479 /* Dump into the obstack the initial part of the output for a given type.
 480    This is necessary when dealing with things like functions returning
 481    functions.  Examples:
 482
 483    return type of `int (* fee ())()': pointer -> function -> int.  Both
 484    pointer (and reference and offset) and function (and member) types must
 485    deal with prefix and suffix.
 486
 487    Arrays must also do this for DECL nodes, like int a[], and for things like
 488    int *[]&.  */
 489
 490 static void
 491 dump_type_prefix (tree t, int flags)
 492 {
 493   pp_base (cxx_pp)->padding = pp_none;
 494
 495   if (TYPE_PTRMEMFUNC_P (t))
 496     {
 497       t = TYPE_PTRMEMFUNC_FN_TYPE (t);
 498       goto offset_type;
 499     }
 500
 501   switch (TREE_CODE (t))
 502     {
 503     case POINTER_TYPE:
 504     case REFERENCE_TYPE:
 505       {
 506         tree sub = TREE_TYPE (t);
 507
 508         dump_type_prefix (sub, flags);
 509         if (TREE_CODE (sub) == ARRAY_TYPE)
 510           {
 511             pp_space (cxx_pp);
 512             pp_left_paren (cxx_pp);
 513           }
 514         pp_character (cxx_pp, "&*"[TREE_CODE (t) == POINTER_TYPE]);
 515         pp_base (cxx_pp)->padding = pp_before;
 516         pp_cxx_cv_qualifier_seq (cxx_pp, t);
 517       }
 518       break;
 519
 520     case OFFSET_TYPE:
 521     offset_type:
 522       dump_type_prefix (TREE_TYPE (t), flags);
 523       if (TREE_CODE (t) == OFFSET_TYPE) /* pmfs deal with this in d_t_p */
 524         {
 525           pp_maybe_space (cxx_pp);
 526           dump_type (TYPE_OFFSET_BASETYPE (t), flags);
 527           pp_colon_colon (cxx_pp);
 528         }
 529       pp_star (cxx_pp);
 530       pp_cxx_cv_qualifier_seq (cxx_pp, t);
 531       break;
 532
 533       /* Can only be reached through function pointer -- this would not be
 534          correct if FUNCTION_DECLs used it.  */
 535     case FUNCTION_TYPE:
 536       dump_type_prefix (TREE_TYPE (t), flags);
 537       pp_maybe_space (cxx_pp);
 538       pp_left_paren (cxx_pp);
 539       break;
 540
 541     case METHOD_TYPE:
 542       dump_type_prefix (TREE_TYPE (t), flags);
 543       pp_maybe_space (cxx_pp);
 544       pp_left_paren (cxx_pp);
 545       dump_aggr_type (TYPE_METHOD_BASETYPE (t), flags);
 546       pp_colon_colon (cxx_pp);
 547       break;
 548
 549     case ARRAY_TYPE:
 550       dump_type_prefix (TREE_TYPE (t), flags);
 551       break;
 552
 553     case ENUMERAL_TYPE:
 554     case IDENTIFIER_NODE:
 555     case INTEGER_TYPE:
 556     case BOOLEAN_TYPE:
 557     case REAL_TYPE:
 558     case RECORD_TYPE:
 559     case TEMPLATE_TYPE_PARM:
 560     case TEMPLATE_TEMPLATE_PARM:
 561     case BOUND_TEMPLATE_TEMPLATE_PARM:
 562     case TREE_LIST:
 563     case TYPE_DECL:
 564     case TREE_VEC:
 565     case UNION_TYPE:
 566     case UNKNOWN_TYPE:
 567     case VOID_TYPE:
 568     case TYPENAME_TYPE:
 569     case COMPLEX_TYPE:
 570     case VECTOR_TYPE:
 571     case TYPEOF_TYPE:
 572       dump_type (t, flags);
 573       pp_base (cxx_pp)->padding = pp_before;
 574       break;
 575
 576     default:
 577       pp_unsupported_tree (cxx_pp, t);
 578       /* fall through.  */
 579     case ERROR_MARK:
 580       pp_identifier (cxx_pp, "<typeprefixerror>");
 581       break;
 582     }
 583 }
 584
 585 /* Dump the suffix of type T, under control of FLAGS.  This is the part
 586    which appears after the identifier (or function parms).  */
 587
 588 static void
 589 dump_type_suffix (tree t, int flags)
 590 {
 591   if (TYPE_PTRMEMFUNC_P (t))
 592     t = TYPE_PTRMEMFUNC_FN_TYPE (t);
 593
 594   switch (TREE_CODE (t))
 595     {
 596     case POINTER_TYPE:
 597     case REFERENCE_TYPE:
 598     case OFFSET_TYPE:
 599       if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE)
 600         pp_right_paren (cxx_pp);
 601       dump_type_suffix (TREE_TYPE (t), flags);
 602       break;
 603
 604       /* Can only be reached through function pointer.  */
 605     case FUNCTION_TYPE:
 606     case METHOD_TYPE:
 607       {
 608         tree arg;
 609         pp_right_paren (cxx_pp);
 610         arg = TYPE_ARG_TYPES (t);
 611         if (TREE_CODE (t) == METHOD_TYPE)
 612           arg = TREE_CHAIN (arg);
 613
 614         /* Function pointers don't have default args.  Not in standard C++,
 615            anyway; they may in g++, but we'll just pretend otherwise.  */
 616         dump_parameters (arg, flags & ~TFF_FUNCTION_DEFAULT_ARGUMENTS);
 617
 618         if (TREE_CODE (t) == METHOD_TYPE)
 619           pp_cxx_cv_qualifier_seq
 620             (cxx_pp, TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (t))));
 621         dump_exception_spec (TYPE_RAISES_EXCEPTIONS (t), flags);
 622         dump_type_suffix (TREE_TYPE (t), flags);
 623         break;
 624       }
 625
 626     case ARRAY_TYPE:
 627       pp_left_bracket (cxx_pp);
 628       if (TYPE_DOMAIN (t))
 629         {
 630           if (host_integerp (TYPE_MAX_VALUE (TYPE_DOMAIN (t)), 0))
 631             pp_wide_integer
 632               (cxx_pp, tree_low_cst (TYPE_MAX_VALUE (TYPE_DOMAIN (t)), 0) + 1);
 633           else if (TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (t))) == MINUS_EXPR)
 634             dump_expr (TREE_OPERAND (TYPE_MAX_VALUE (TYPE_DOMAIN (t)), 0),
 635                        flags & ~TFF_EXPR_IN_PARENS);
 636           else
 637             dump_expr (fold (cp_build_binary_op
 638                              (PLUS_EXPR, TYPE_MAX_VALUE (TYPE_DOMAIN (t)),
 639                               integer_one_node)),
 640                        flags & ~TFF_EXPR_IN_PARENS);
 641         }
 642       pp_right_bracket (cxx_pp);
 643       dump_type_suffix (TREE_TYPE (t), flags);
 644       break;
 645
 646     case ENUMERAL_TYPE:
 647     case IDENTIFIER_NODE:
 648     case INTEGER_TYPE:
 649     case BOOLEAN_TYPE:
 650     case REAL_TYPE:
 651     case RECORD_TYPE:
 652     case TEMPLATE_TYPE_PARM:
 653     case TEMPLATE_TEMPLATE_PARM:
 654     case BOUND_TEMPLATE_TEMPLATE_PARM:
 655     case TREE_LIST:
 656     case TYPE_DECL:
 657     case TREE_VEC:
 658     case UNION_TYPE:
 659     case UNKNOWN_TYPE:
 660     case VOID_TYPE:
 661     case TYPENAME_TYPE:
 662     case COMPLEX_TYPE:
 663     case VECTOR_TYPE:
 664     case TYPEOF_TYPE:
 665       break;
 666
 667     default:
 668       pp_unsupported_tree (cxx_pp, t);
 669     case ERROR_MARK:
 670       /* Don't mark it here, we should have already done in
 671          dump_type_prefix.  */
 672       break;
 673     }
 674 }
 675
 676 static void
 677 dump_global_iord (tree t)
 678 {
 679   const char *p = NULL;
 680
 681   if (DECL_GLOBAL_CTOR_P (t))
 682     p = "initializers";
 683   else if (DECL_GLOBAL_DTOR_P (t))
 684     p = "destructors";
 685   else
 686     abort ();
 687
 688   pp_printf (pp_base (cxx_pp), "(static %s for %s)", p, input_filename);
 689 }
 690
 691 static void
 692 dump_simple_decl (tree t, tree type, int flags)
 693 {
 694   if (flags & TFF_DECL_SPECIFIERS)
 695     {
 696       dump_type_prefix (type, flags);
 697       pp_maybe_space (cxx_pp);
 698     }
 699   if (!DECL_INITIAL (t) || TREE_CODE (DECL_INITIAL (t)) != TEMPLATE_PARM_INDEX)
 700     dump_scope (CP_DECL_CONTEXT (t), flags);
 701   if (DECL_NAME (t))
 702     dump_decl (DECL_NAME (t), flags);
 703   else
 704     pp_identifier (cxx_pp, "<anonymous>");
 705   if (flags & TFF_DECL_SPECIFIERS)
 706     dump_type_suffix (type, flags);
 707 }
 708
 709 /* Dump a human readable string for the decl T under control of FLAGS.  */
 710
 711 static void
 712 dump_decl (tree t, int flags)
 713 {
 714   if (t == NULL_TREE)
 715     return;
 716
 717   switch (TREE_CODE (t))
 718     {
 719     case TYPE_DECL:
 720       {
 721         /* Don't say 'typedef class A' */
 722         if (DECL_ARTIFICIAL (t))
 723           {
 724             if ((flags & TFF_DECL_SPECIFIERS)
 725                 && TREE_CODE (TREE_TYPE (t)) == TEMPLATE_TYPE_PARM)
 726               /* Say `class T' not just `T'.  */
 727               pp_string (cxx_pp, "class ");
 728
 729             dump_type (TREE_TYPE (t), flags);
 730             break;
 731           }
 732       }
 733       if (flags & TFF_DECL_SPECIFIERS)
 734         pp_string (cxx_pp, "typedef ");
 735       dump_simple_decl (t, DECL_ORIGINAL_TYPE (t)
 736                         ? DECL_ORIGINAL_TYPE (t) : TREE_TYPE (t),
 737                         flags);
 738       break;
 739
 740     case VAR_DECL:
 741       if (DECL_NAME (t) && VTABLE_NAME_P (DECL_NAME (t)))
 742         {
 743           pp_string (cxx_pp, "vtable for ");
 744           my_friendly_assert (TYPE_P (DECL_CONTEXT (t)), 20010720);
 745           dump_type (DECL_CONTEXT (t), flags);
 746           break;
 747         }
 748       /* Else fall through.  */
 749     case FIELD_DECL:
 750     case PARM_DECL:
 751     case ALIAS_DECL:
 752       dump_simple_decl (t, TREE_TYPE (t), flags);
 753       break;
 754
 755     case RESULT_DECL:
 756       pp_string (cxx_pp, "<return value> ");
 757       dump_simple_decl (t, TREE_TYPE (t), flags);
 758       break;
 759
 760     case NAMESPACE_DECL:
 761       if (flags & TFF_DECL_SPECIFIERS)
 762         pp_cxx_declaration (cxx_pp, t);
 763       else
 764         {
 765           dump_scope (CP_DECL_CONTEXT (t), flags);
 766           if (DECL_NAME (t) == NULL_TREE)
 767             pp_identifier (cxx_pp, "<unnamed>");
 768           else
 769             pp_tree_identifier (cxx_pp, DECL_NAME (t));
 770         }
 771       break;
 772
 773     case SCOPE_REF:
 774       dump_decl (TREE_OPERAND (t, 0), flags & ~TFF_DECL_SPECIFIERS);
 775       pp_colon_colon (cxx_pp);
 776       dump_decl (TREE_OPERAND (t, 1), flags);
 777       break;
 778
 779     case ARRAY_REF:
 780       dump_decl (TREE_OPERAND (t, 0), flags);
 781       pp_left_bracket (cxx_pp);
 782       dump_decl (TREE_OPERAND (t, 1), flags);
 783       pp_right_bracket (cxx_pp);
 784       break;
 785
 786       /* So that we can do dump_decl on an aggr type.  */
 787     case RECORD_TYPE:
 788     case UNION_TYPE:
 789     case ENUMERAL_TYPE:
 790       dump_type (t, flags);
 791       break;
 792
 793     case BIT_NOT_EXPR:
 794       /* This is a pseudo destructor call which has not been folded into
 795          a PSEUDO_DTOR_EXPR yet.  */
 796       pp_complement (cxx_pp);
 797       dump_type (TREE_OPERAND (t, 0), flags);
 798       break;
 799
 800     case TYPE_EXPR:
 801       abort ();
 802       break;
 803
 804       /* These special cases are duplicated here so that other functions
 805          can feed identifiers to error and get them demangled properly.  */
 806     case IDENTIFIER_NODE:
 807       if (IDENTIFIER_TYPENAME_P (t))
 808         {
 809           pp_string (cxx_pp, "operator ");
 810           /* Not exactly IDENTIFIER_TYPE_VALUE.  */
 811           dump_type (TREE_TYPE (t), flags);
 812           break;
 813         }
 814       else
 815         pp_tree_identifier (cxx_pp, t);
 816       break;
 817
 818     case OVERLOAD:
 819       if (OVL_CHAIN (t))
 820         {
 821           t = OVL_CURRENT (t);
 822           if (DECL_CLASS_SCOPE_P (t))
 823             {
 824               dump_type (DECL_CONTEXT (t), flags);
 825               pp_colon_colon (cxx_pp);
 826             }
 827           else if (DECL_CONTEXT (t))
 828             {
 829               dump_decl (DECL_CONTEXT (t), flags);
 830               pp_colon_colon (cxx_pp);
 831             }
 832           dump_decl (DECL_NAME (t), flags);
 833           break;
 834         }
 835
 836       /* If there's only one function, just treat it like an ordinary
 837          FUNCTION_DECL.  */
 838       t = OVL_CURRENT (t);
 839       /* Fall through.  */
 840
 841     case FUNCTION_DECL:
 842       if (DECL_GLOBAL_CTOR_P (t) || DECL_GLOBAL_DTOR_P (t))
 843         dump_global_iord (t);
 844       else if (! DECL_LANG_SPECIFIC (t))
 845         pp_identifier (cxx_pp, "<internal>");
 846       else
 847         dump_function_decl (t, flags);
 848       break;
 849
 850     case TEMPLATE_DECL:
 851       dump_template_decl (t, flags);
 852       break;
 853
 854     case TEMPLATE_ID_EXPR:
 855       {
 856         tree name = TREE_OPERAND (t, 0);
 857
 858         if (is_overloaded_fn (name))
 859           name = DECL_NAME (get_first_fn (name));
 860         dump_decl (name, flags);
 861         pp_template_argument_list_start (cxx_pp);
 862         if (TREE_OPERAND (t, 1))
 863           dump_template_argument_list (TREE_OPERAND (t, 1), flags);
 864         pp_template_argument_list_end (cxx_pp);
 865       }
 866       break;
 867
 868     case LABEL_DECL:
 869       pp_tree_identifier (cxx_pp, DECL_NAME (t));
 870       break;
 871
 872     case CONST_DECL:
 873       if ((TREE_TYPE (t) != NULL_TREE && NEXT_CODE (t) == ENUMERAL_TYPE)
 874           || (DECL_INITIAL (t) &&
 875               TREE_CODE (DECL_INITIAL (t)) == TEMPLATE_PARM_INDEX))
 876         dump_simple_decl (t, TREE_TYPE (t), flags);
 877       else if (DECL_NAME (t))
 878         dump_decl (DECL_NAME (t), flags);
 879       else if (DECL_INITIAL (t))
 880         dump_expr (DECL_INITIAL (t), flags | TFF_EXPR_IN_PARENS);
 881       else
 882         pp_identifier (cxx_pp, "<enumerator>");
 883       break;
 884
 885     case USING_DECL:
 886       pp_string (cxx_pp, "using ");
 887       dump_type (DECL_INITIAL (t), flags);
 888       pp_colon_colon (cxx_pp);
 889       dump_decl (DECL_NAME (t), flags);
 890       break;
 891
 892     case BASELINK:
 893       dump_decl (BASELINK_FUNCTIONS (t), flags);
 894       break;
 895
 896     case NON_DEPENDENT_EXPR:
 897       dump_expr (t, flags);
 898       break;
 899
 900     case TEMPLATE_TYPE_PARM:
 901       if (flags & TFF_DECL_SPECIFIERS)
 902         pp_cxx_declaration (cxx_pp, t);
 903       else
 904         pp_type_id (cxx_pp, t);
 905       break;
 906
 907     default:
 908       pp_unsupported_tree (cxx_pp, t);
 909       /* Fall through to error.  */
 910
 911     case ERROR_MARK:
 912       pp_identifier (cxx_pp, "<declaration error>");
 913       break;
 914     }
 915 }
 916
 917 /* Dump a template declaration T under control of FLAGS. This means the
 918    'template <...> leaders plus the 'class X' or 'void fn(...)' part.  */
 919
 920 static void
 921 dump_template_decl (tree t, int flags)
 922 {
 923   tree orig_parms = DECL_TEMPLATE_PARMS (t);
 924   tree parms;
 925   int i;
 926
 927   if (flags & TFF_TEMPLATE_HEADER)
 928     {
 929       for (parms = orig_parms = nreverse (orig_parms);
 930            parms;
 931            parms = TREE_CHAIN (parms))
 932         {
 933           tree inner_parms = INNERMOST_TEMPLATE_PARMS (parms);
 934           int len = TREE_VEC_LENGTH (inner_parms);
 935
 936           pp_string (cxx_pp, "template<");
 937
 938           /* If we've shown the template prefix, we'd better show the
 939              parameters' and decl's type too.  */
 940             flags |= TFF_DECL_SPECIFIERS;
 941
 942           for (i = 0; i < len; i++)
 943             {
 944               if (i)
 945                 pp_separate_with_comma (cxx_pp);
 946               dump_template_parameter (TREE_VEC_ELT (inner_parms, i), flags);
 947             }
 948           pp_template_argument_list_end (cxx_pp);
 949           pp_space (cxx_pp);
 950         }
 951       nreverse(orig_parms);
 952
 953       if (DECL_TEMPLATE_TEMPLATE_PARM_P (t))
 954         /* Say `template<arg> class TT' not just `template<arg> TT'.  */
 955         pp_string (cxx_pp, "class ");
 956     }
 957
 958   if (TREE_CODE (DECL_TEMPLATE_RESULT (t)) == TYPE_DECL)
 959     dump_type (TREE_TYPE (t),
 960                ((flags & ~TFF_CLASS_KEY_OR_ENUM) | TFF_TEMPLATE_NAME
 961                 | (flags & TFF_DECL_SPECIFIERS ? TFF_CLASS_KEY_OR_ENUM : 0)));
 962   else if (TREE_CODE (DECL_TEMPLATE_RESULT (t)) == VAR_DECL)
 963     dump_decl (DECL_TEMPLATE_RESULT (t), flags | TFF_TEMPLATE_NAME);
 964   else if (TREE_TYPE (t) == NULL_TREE)
 965     abort ();
 966   else
 967     switch (NEXT_CODE (t))
 968     {
 969       case METHOD_TYPE:
 970       case FUNCTION_TYPE:
 971         dump_function_decl (t, flags | TFF_TEMPLATE_NAME);
 972         break;
 973       default:
 974         /* This case can occur with some invalid code.  */
 975         dump_type (TREE_TYPE (t),
 976                    (flags & ~TFF_CLASS_KEY_OR_ENUM) | TFF_TEMPLATE_NAME
 977                    | (flags & TFF_DECL_SPECIFIERS ? TFF_CLASS_KEY_OR_ENUM : 0));
 978     }
 979 }
 980
 981 /* Pretty print a function decl. There are several ways we want to print a
 982    function declaration. The TFF_ bits in FLAGS tells us how to behave.
 983    As error can only apply the '#' flag once to give 0 and 1 for V, there
 984    is %D which doesn't print the throw specs, and %F which does.  */
 985
 986 static void
 987 dump_function_decl (tree t, int flags)
 988 {
 989   tree fntype;
 990   tree parmtypes;
 991   tree cname = NULL_TREE;
 992   tree template_args = NULL_TREE;
 993   tree template_parms = NULL_TREE;
 994   int show_return = flags & TFF_RETURN_TYPE || flags & TFF_DECL_SPECIFIERS;
 995
 996   if (TREE_CODE (t) == TEMPLATE_DECL)
 997     t = DECL_TEMPLATE_RESULT (t);
 998
 999   /* Pretty print template instantiations only.  */
1000   if (DECL_USE_TEMPLATE (t) && DECL_TEMPLATE_INFO (t))
1001     {
1002       tree tmpl;
1003
1004       template_args = DECL_TI_ARGS (t);
1005       tmpl = most_general_template (t);
1006       if (tmpl && TREE_CODE (tmpl) == TEMPLATE_DECL)
1007         {
1008           template_parms = DECL_TEMPLATE_PARMS (tmpl);
1009           t = tmpl;
1010         }
1011     }
1012
1013   fntype = TREE_TYPE (t);
1014   parmtypes = FUNCTION_FIRST_USER_PARMTYPE (t);
1015
1016   if (DECL_CLASS_SCOPE_P (t))
1017     cname = DECL_CONTEXT (t);
1018   /* This is for partially instantiated template methods.  */
1019   else if (TREE_CODE (fntype) == METHOD_TYPE)
1020     cname = TREE_TYPE (TREE_VALUE (parmtypes));
1021
1022   if (!(flags & TFF_DECL_SPECIFIERS))
1023     /* OK */;
1024   else if (DECL_STATIC_FUNCTION_P (t))
1025     pp_identifier (cxx_pp, "static ");
1026   else if (DECL_VIRTUAL_P (t))
1027     pp_identifier (cxx_pp, "virtual ");
1028
1029   /* Print the return type?  */
1030   if (show_return)
1031     show_return = !DECL_CONV_FN_P (t)  && !DECL_CONSTRUCTOR_P (t)
1032                   && !DECL_DESTRUCTOR_P (t);
1033   if (show_return)
1034     {
1035       dump_type_prefix (TREE_TYPE (fntype), flags);
1036       pp_space (cxx_pp);
1037     }
1038
1039   /* Print the function name.  */
1040   if (cname)
1041     {
1042       dump_type (cname, flags);
1043       pp_colon_colon (cxx_pp);
1044     }
1045   else
1046     dump_scope (CP_DECL_CONTEXT (t), flags);
1047
1048   dump_function_name (t, flags);
1049
1050   if (!(flags & TFF_NO_FUNCTION_ARGUMENTS))
1051     {
1052       dump_parameters (parmtypes, flags);
1053
1054       if (TREE_CODE (fntype) == METHOD_TYPE)
1055         pp_cxx_cv_qualifier_seq
1056           (cxx_pp, TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype))));
1057
1058       if (flags & TFF_EXCEPTION_SPECIFICATION)
1059         dump_exception_spec (TYPE_RAISES_EXCEPTIONS (fntype), flags);
1060
1061       if (show_return)
1062         dump_type_suffix (TREE_TYPE (fntype), flags);
1063     }
1064
1065   /* If T is a template instantiation, dump the parameter binding.  */
1066   if (template_parms != NULL_TREE && template_args != NULL_TREE)
1067     {
1068       pp_string (cxx_pp, " [with ");
1069       dump_template_bindings (template_parms, template_args);
1070       pp_right_bracket (cxx_pp);
1071     }
1072 }
1073
1074 /* Print a parameter list. If this is for a member function, the
1075    member object ptr (and any other hidden args) should have
1076    already been removed.  */
1077
1078 static void
1079 dump_parameters (tree parmtypes, int flags)
1080 {
1081   int first;
1082
1083   pp_left_paren (cxx_pp);
1084
1085   for (first = 1; parmtypes != void_list_node;
1086        parmtypes = TREE_CHAIN (parmtypes))
1087     {
1088       if (!first)
1089         pp_separate_with_comma (cxx_pp);
1090       first = 0;
1091       if (!parmtypes)
1092         {
1093           pp_identifier (cxx_pp, "...");
1094           break;
1095         }
1096       dump_type (TREE_VALUE (parmtypes), flags);
1097
1098       if ((flags & TFF_FUNCTION_DEFAULT_ARGUMENTS) && TREE_PURPOSE (parmtypes))
1099         {
1100           pp_string (cxx_pp, " = ");
1101           dump_expr (TREE_PURPOSE (parmtypes), flags | TFF_EXPR_IN_PARENS);
1102         }
1103     }
1104
1105   pp_right_paren (cxx_pp);
1106 }
1107
1108 /* Print an exception specification. T is the exception specification.  */
1109
1110 static void
1111 dump_exception_spec (tree t, int flags)
1112 {
1113   if (t)
1114     {
1115       pp_string (cxx_pp, " throw (");
1116       if (TREE_VALUE (t) != NULL_TREE)
1117         while (1)
1118           {
1119             dump_type (TREE_VALUE (t), flags);
1120             t = TREE_CHAIN (t);
1121             if (!t)
1122               break;
1123             pp_separate_with_comma (cxx_pp);
1124           }
1125       pp_right_paren (cxx_pp);
1126     }
1127 }
1128
1129 /* Handle the function name for a FUNCTION_DECL node, grokking operators
1130    and destructors properly.  */
1131
1132 static void
1133 dump_function_name (tree t, int flags)
1134 {
1135   tree name = DECL_NAME (t);
1136
1137   /* We can get here with a decl that was synthesized by language-
1138      independent machinery (e.g. coverage.c) in which case it won't
1139      have a lang_specific structure attached and DECL_CONSTRUCTOR_P
1140      will crash.  In this case it is safe just to print out the
1141      literal name.  */
1142   if (!DECL_LANG_SPECIFIC (t))
1143     {
1144       pp_tree_identifier (cxx_pp, name);
1145       return;
1146     }
1147
1148   if (TREE_CODE (t) == TEMPLATE_DECL)
1149     t = DECL_TEMPLATE_RESULT (t);
1150
1151   /* Don't let the user see __comp_ctor et al.  */
1152   if (DECL_CONSTRUCTOR_P (t)
1153       || DECL_DESTRUCTOR_P (t))
1154     name = constructor_name (DECL_CONTEXT (t));
1155
1156   if (DECL_DESTRUCTOR_P (t))
1157     {
1158       pp_complement (cxx_pp);
1159       dump_decl (name, TFF_PLAIN_IDENTIFIER);
1160     }
1161   else if (DECL_CONV_FN_P (t))
1162     {
1163       /* This cannot use the hack that the operator's return
1164          type is stashed off of its name because it may be
1165          used for error reporting.  In the case of conflicting
1166          declarations, both will have the same name, yet
1167          the types will be different, hence the TREE_TYPE field
1168          of the first name will be clobbered by the second.  */
1169       pp_string (cxx_pp, "operator ");
1170       dump_type (TREE_TYPE (TREE_TYPE (t)), flags);
1171     }
1172   else if (IDENTIFIER_OPNAME_P (name))
1173     pp_tree_identifier (cxx_pp, name);
1174   else
1175     dump_decl (name, flags);
1176
1177   if (DECL_TEMPLATE_INFO (t)
1178       && !DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (t)
1179       && (DECL_TEMPLATE_SPECIALIZATION (t)
1180           || TREE_CODE (DECL_TI_TEMPLATE (t)) != TEMPLATE_DECL
1181           || DECL_TEMPLATE_SPECIALIZATION (DECL_TI_TEMPLATE (t))
1182           || PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (t))))
1183     dump_template_parms (DECL_TEMPLATE_INFO (t), !DECL_USE_TEMPLATE (t), flags);
1184 }
1185
1186 /* Dump the template parameters from the template info INFO under control of
1187    FLAGS. PRIMARY indicates whether this is a primary template decl, or
1188    specialization (partial or complete). For partial specializations we show
1189    the specialized parameter values. For a primary template we show no
1190    decoration.  */
1191
1192 static void
1193 dump_template_parms (tree info, int primary, int flags)
1194 {
1195   tree args = info ? TI_ARGS (info) : NULL_TREE;
1196
1197   if (primary && flags & TFF_TEMPLATE_NAME)
1198     return;
1199   flags &= ~(TFF_CLASS_KEY_OR_ENUM | TFF_TEMPLATE_NAME);
1200   pp_template_argument_list_start (cxx_pp);
1201
1202   /* Be careful only to print things when we have them, so as not
1203          to crash producing error messages.  */
1204   if (args && !primary)
1205     {
1206       int len, ix;
1207
1208       if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (args))
1209         args = TREE_VEC_ELT (args, TREE_VEC_LENGTH (args) - 1);
1210
1211       len = TREE_VEC_LENGTH (args);
1212
1213       for (ix = 0; ix != len; ix++)
1214         {
1215           tree arg = TREE_VEC_ELT (args, ix);
1216
1217           if (ix)
1218             pp_separate_with_comma (cxx_pp);
1219
1220           if (!arg)
1221             pp_identifier (cxx_pp, "<template parameter error>");
1222           else
1223             dump_template_argument (arg, flags);
1224         }
1225     }
1226   else if (primary)
1227     {
1228       tree tpl = TI_TEMPLATE (info);
1229       tree parms = DECL_TEMPLATE_PARMS (tpl);
1230       int len, ix;
1231
1232       parms = TREE_CODE (parms) == TREE_LIST ? TREE_VALUE (parms) : NULL_TREE;
1233       len = parms ? TREE_VEC_LENGTH (parms) : 0;
1234
1235       for (ix = 0; ix != len; ix++)
1236         {
1237           tree parm = TREE_VALUE (TREE_VEC_ELT (parms, ix));
1238
1239           if (ix)
1240             pp_separate_with_comma (cxx_pp);
1241
1242           dump_decl (parm, flags & ~TFF_DECL_SPECIFIERS);
1243         }
1244     }
1245   pp_template_argument_list_end (cxx_pp);
1246 }
1247
1248 /* Print out a list of initializers (subr of dump_expr).  */
1249
1250 static void
1251 dump_expr_list (tree l, int flags)
1252 {
1253   while (l)
1254     {
1255       dump_expr (TREE_VALUE (l), flags | TFF_EXPR_IN_PARENS);
1256       l = TREE_CHAIN (l);
1257       if (l)
1258         pp_separate_with_comma (cxx_pp);
1259     }
1260 }
1261
1262 /* Print out an expression E under control of FLAGS.  */
1263
1264 static void
1265 dump_expr (tree t, int flags)
1266 {
1267   if (t == 0)
1268     return;
1269
1270   switch (TREE_CODE (t))
1271     {
1272     case VAR_DECL:
1273     case PARM_DECL:
1274     case FIELD_DECL:
1275     case CONST_DECL:
1276     case FUNCTION_DECL:
1277     case TEMPLATE_DECL:
1278     case NAMESPACE_DECL:
1279     case OVERLOAD:
1280     case IDENTIFIER_NODE:
1281       dump_decl (t, (flags & ~TFF_DECL_SPECIFIERS) | TFF_NO_FUNCTION_ARGUMENTS);
1282       break;
1283
1284     case INTEGER_CST:
1285     case STRING_CST:
1286     case REAL_CST:
1287        pp_c_constant (pp_c_base (cxx_pp), t);
1288       break;
1289
1290     case THROW_EXPR:
1291       pp_identifier (cxx_pp, "throw");
1292       dump_expr (TREE_OPERAND (t, 0), flags);
1293       break;
1294
1295     case PTRMEM_CST:
1296       pp_ampersand (cxx_pp);
1297       dump_type (PTRMEM_CST_CLASS (t), flags);
1298       pp_colon_colon (cxx_pp);
1299       pp_tree_identifier (cxx_pp, DECL_NAME (PTRMEM_CST_MEMBER (t)));
1300       break;
1301
1302     case COMPOUND_EXPR:
1303       pp_left_paren (cxx_pp);
1304       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1305       pp_separate_with_comma (cxx_pp);
1306       dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1307       pp_right_paren (cxx_pp);
1308       break;
1309
1310     case COND_EXPR:
1311       pp_left_paren (cxx_pp);
1312       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1313       pp_string (cxx_pp, " ? ");
1314       dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1315       pp_string (cxx_pp, " : ");
1316       dump_expr (TREE_OPERAND (t, 2), flags | TFF_EXPR_IN_PARENS);
1317       pp_right_paren (cxx_pp);
1318       break;
1319
1320     case SAVE_EXPR:
1321       if (TREE_HAS_CONSTRUCTOR (t))
1322         {
1323           pp_string (cxx_pp, "new ");
1324           dump_type (TREE_TYPE (TREE_TYPE (t)), flags);
1325         }
1326       else
1327         dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1328       break;
1329
1330     case AGGR_INIT_EXPR:
1331       {
1332         tree fn = NULL_TREE;
1333
1334         if (TREE_CODE (TREE_OPERAND (t, 0)) == ADDR_EXPR)
1335           fn = TREE_OPERAND (TREE_OPERAND (t, 0), 0);
1336
1337         if (fn && TREE_CODE (fn) == FUNCTION_DECL)
1338           {
1339             if (DECL_CONSTRUCTOR_P (fn))
1340               pp_tree_identifier (cxx_pp, TYPE_IDENTIFIER (TREE_TYPE (t)));
1341             else
1342               dump_decl (fn, 0);
1343           }
1344         else
1345           dump_expr (TREE_OPERAND (t, 0), 0);
1346       }
1347       pp_left_paren (cxx_pp);
1348       if (TREE_OPERAND (t, 1))
1349         dump_expr_list (TREE_CHAIN (TREE_OPERAND (t, 1)), flags);
1350       pp_right_paren (cxx_pp);
1351       break;
1352
1353     case CALL_EXPR:
1354       {
1355         tree fn = TREE_OPERAND (t, 0);
1356         tree args = TREE_OPERAND (t, 1);
1357
1358         if (TREE_CODE (fn) == ADDR_EXPR)
1359           fn = TREE_OPERAND (fn, 0);
1360
1361         if (TREE_TYPE (fn) != NULL_TREE && NEXT_CODE (fn) == METHOD_TYPE)
1362           {
1363             tree ob = TREE_VALUE (args);
1364             if (TREE_CODE (ob) == ADDR_EXPR)
1365               {
1366                 dump_expr (TREE_OPERAND (ob, 0), flags | TFF_EXPR_IN_PARENS);
1367                 pp_dot (cxx_pp);
1368               }
1369             else if (TREE_CODE (ob) != PARM_DECL
1370                      || strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this"))
1371               {
1372                 dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1373                 pp_arrow (cxx_pp);
1374               }
1375             args = TREE_CHAIN (args);
1376           }
1377         dump_expr (fn, flags | TFF_EXPR_IN_PARENS);
1378         pp_left_paren (cxx_pp);
1379         dump_expr_list (args, flags);
1380         pp_right_paren (cxx_pp);
1381       }
1382       break;
1383
1384     case NEW_EXPR:
1385       {
1386         tree type = TREE_OPERAND (t, 1);
1387         tree init = TREE_OPERAND (t, 2);
1388         if (NEW_EXPR_USE_GLOBAL (t))
1389           pp_colon_colon (cxx_pp);
1390         pp_string (cxx_pp, "new ");
1391         if (TREE_OPERAND (t, 0))
1392           {
1393             pp_left_paren (cxx_pp);
1394             dump_expr_list (TREE_OPERAND (t, 0), flags);
1395             pp_string (cxx_pp, ") ");
1396           }
1397         if (TREE_CODE (type) == ARRAY_REF)
1398           type = build_cplus_array_type
1399             (TREE_OPERAND (type, 0),
1400              build_index_type (fold (build (MINUS_EXPR, integer_type_node,
1401                                             TREE_OPERAND (type, 1),
1402                                             integer_one_node))));
1403         dump_type (type, flags);
1404         if (init)
1405           {
1406             pp_left_paren (cxx_pp);
1407             if (TREE_CODE (init) == TREE_LIST)
1408               dump_expr_list (init, flags);
1409             else if (init == void_zero_node)
1410               /* This representation indicates an empty initializer,
1411                  e.g.: "new int()".  */
1412               ;
1413             else
1414               dump_expr (init, flags);
1415             pp_right_paren (cxx_pp);
1416           }
1417       }
1418       break;
1419
1420     case TARGET_EXPR:
1421       /* Note that this only works for G++ target exprs.  If somebody
1422          builds a general TARGET_EXPR, there's no way to represent that
1423          it initializes anything other that the parameter slot for the
1424          default argument.  Note we may have cleared out the first
1425          operand in expand_expr, so don't go killing ourselves.  */
1426       if (TREE_OPERAND (t, 1))
1427         dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1428       break;
1429
1430     case INIT_EXPR:
1431     case MODIFY_EXPR:
1432     case PLUS_EXPR:
1433     case MINUS_EXPR:
1434     case MULT_EXPR:
1435     case TRUNC_DIV_EXPR:
1436     case TRUNC_MOD_EXPR:
1437     case MIN_EXPR:
1438     case MAX_EXPR:
1439     case LSHIFT_EXPR:
1440     case RSHIFT_EXPR:
1441     case BIT_IOR_EXPR:
1442     case BIT_XOR_EXPR:
1443     case BIT_AND_EXPR:
1444     case TRUTH_ANDIF_EXPR:
1445     case TRUTH_ORIF_EXPR:
1446     case LT_EXPR:
1447     case LE_EXPR:
1448     case GT_EXPR:
1449     case GE_EXPR:
1450     case EQ_EXPR:
1451     case NE_EXPR:
1452     case EXACT_DIV_EXPR:
1453       dump_binary_op (operator_name_info[(int) TREE_CODE (t)].name, t, flags);
1454       break;
1455
1456     case CEIL_DIV_EXPR:
1457     case FLOOR_DIV_EXPR:
1458     case ROUND_DIV_EXPR:
1459       dump_binary_op ("/", t, flags);
1460       break;
1461
1462     case CEIL_MOD_EXPR:
1463     case FLOOR_MOD_EXPR:
1464     case ROUND_MOD_EXPR:
1465       dump_binary_op ("%", t, flags);
1466       break;
1467
1468     case COMPONENT_REF:
1469       {
1470         tree ob = TREE_OPERAND (t, 0);
1471         if (TREE_CODE (ob) == INDIRECT_REF)
1472           {
1473             ob = TREE_OPERAND (ob, 0);
1474             if (TREE_CODE (ob) != PARM_DECL
1475                 || strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this"))
1476               {
1477                 dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1478                 pp_arrow (cxx_pp);
1479               }
1480           }
1481         else
1482           {
1483             dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1484             pp_dot (cxx_pp);
1485           }
1486         dump_expr (TREE_OPERAND (t, 1), flags & ~TFF_EXPR_IN_PARENS);
1487       }
1488       break;
1489
1490     case ARRAY_REF:
1491       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1492       pp_left_bracket (cxx_pp);
1493       dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1494       pp_right_bracket (cxx_pp);
1495       break;
1496
1497     case CONVERT_EXPR:
1498       if (TREE_TYPE (t) && VOID_TYPE_P (TREE_TYPE (t)))
1499         {
1500           pp_left_paren (cxx_pp);
1501           dump_type (TREE_TYPE (t), flags);
1502           pp_right_paren (cxx_pp);
1503           dump_expr (TREE_OPERAND (t, 0), flags);
1504         }
1505       else
1506         dump_unary_op ("+", t, flags);
1507       break;
1508
1509     case ADDR_EXPR:
1510       if (TREE_CODE (TREE_OPERAND (t, 0)) == FUNCTION_DECL
1511           || TREE_CODE (TREE_OPERAND (t, 0)) == STRING_CST
1512           /* An ADDR_EXPR can have reference type.  In that case, we
1513              shouldn't print the `&' doing so indicates to the user
1514              that the expression has pointer type.  */
1515           || (TREE_TYPE (t)
1516               && TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE))
1517         dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1518       else
1519         dump_unary_op ("&", t, flags);
1520       break;
1521
1522     case INDIRECT_REF:
1523       if (TREE_HAS_CONSTRUCTOR (t))
1524         {
1525           t = TREE_OPERAND (t, 0);
1526           my_friendly_assert (TREE_CODE (t) == CALL_EXPR, 237);
1527           dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1528           pp_left_paren (cxx_pp);
1529           dump_expr_list (TREE_CHAIN (TREE_OPERAND (t, 1)), flags);
1530           pp_right_paren (cxx_pp);
1531         }
1532       else
1533         {
1534           if (TREE_OPERAND (t,0) != NULL_TREE
1535               && TREE_TYPE (TREE_OPERAND (t, 0))
1536               && NEXT_CODE (TREE_OPERAND (t, 0)) == REFERENCE_TYPE)
1537             dump_expr (TREE_OPERAND (t, 0), flags);
1538           else
1539             dump_unary_op ("*", t, flags);
1540         }
1541       break;
1542
1543     case NEGATE_EXPR:
1544     case BIT_NOT_EXPR:
1545     case TRUTH_NOT_EXPR:
1546     case PREDECREMENT_EXPR:
1547     case PREINCREMENT_EXPR:
1548       dump_unary_op (operator_name_info [(int)TREE_CODE (t)].name, t, flags);
1549       break;
1550
1551     case POSTDECREMENT_EXPR:
1552     case POSTINCREMENT_EXPR:
1553       pp_left_paren (cxx_pp);
1554       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1555       pp_identifier (cxx_pp, operator_name_info[(int)TREE_CODE (t)].name);
1556       pp_right_paren (cxx_pp);
1557       break;
1558
1559     case NON_LVALUE_EXPR:
1560       /* FIXME: This is a KLUDGE workaround for a parsing problem.  There
1561          should be another level of INDIRECT_REF so that I don't have to do
1562          this.  */
1563       if (TREE_TYPE (t) != NULL_TREE && NEXT_CODE (t) == POINTER_TYPE)
1564         {
1565           tree next = TREE_TYPE (TREE_TYPE (t));
1566
1567           while (TREE_CODE (next) == POINTER_TYPE)
1568             next = TREE_TYPE (next);
1569
1570           if (TREE_CODE (next) == FUNCTION_TYPE)
1571             {
1572               if (flags & TFF_EXPR_IN_PARENS)
1573                 pp_left_paren (cxx_pp);
1574               pp_star (cxx_pp);
1575               dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1576               if (flags & TFF_EXPR_IN_PARENS)
1577                 pp_right_paren (cxx_pp);
1578               break;
1579             }
1580           /* Else fall through.  */
1581         }
1582       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1583       break;
1584
1585     case NOP_EXPR:
1586       {
1587         tree op = TREE_OPERAND (t, 0);
1588
1589         if (!same_type_p (TREE_TYPE (op), TREE_TYPE (t)))
1590           {
1591             /* It is a cast, but we cannot tell whether it is a
1592                reinterpret or static cast. Use the C style notation.  */
1593             if (flags & TFF_EXPR_IN_PARENS)
1594               pp_left_paren (cxx_pp);
1595             pp_left_paren (cxx_pp);
1596             dump_type (TREE_TYPE (t), flags);
1597             pp_right_paren (cxx_pp);
1598             dump_expr (op, flags | TFF_EXPR_IN_PARENS);
1599             if (flags & TFF_EXPR_IN_PARENS)
1600               pp_right_paren (cxx_pp);
1601           }
1602         else
1603           dump_expr (op, flags);
1604         break;
1605       }
1606
1607     case CONSTRUCTOR:
1608       if (TREE_TYPE (t) && TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
1609         {
1610           tree idx = build_ptrmemfunc_access_expr (t, pfn_identifier);
1611
1612           if (integer_zerop (idx))
1613             {
1614               /* A NULL pointer-to-member constant.  */
1615               pp_left_paren (cxx_pp);
1616               pp_left_paren (cxx_pp);
1617               dump_type (TREE_TYPE (t), flags);
1618               pp_right_paren (cxx_pp);
1619               pp_string (cxx_pp, ")0)");
1620               break;
1621             }
1622           else if (host_integerp (idx, 0))
1623             {
1624               tree virtuals;
1625               unsigned HOST_WIDE_INT n;
1626
1627               t = TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (TREE_TYPE (t)));
1628               t = TYPE_METHOD_BASETYPE (t);
1629               virtuals = TYPE_BINFO_VIRTUALS (TYPE_MAIN_VARIANT (t));
1630
1631               n = tree_low_cst (idx, 0);
1632
1633               /* Map vtable index back one, to allow for the null pointer to
1634                  member.  */
1635               --n;
1636
1637               while (n > 0 && virtuals)
1638                 {
1639                   --n;
1640                   virtuals = TREE_CHAIN (virtuals);
1641                 }
1642               if (virtuals)
1643                 {
1644                   dump_expr (BV_FN (virtuals),
1645                              flags | TFF_EXPR_IN_PARENS);
1646                   break;
1647                 }
1648             }
1649         }
1650       if (TREE_TYPE (t) && !CONSTRUCTOR_ELTS (t))
1651         {
1652           dump_type (TREE_TYPE (t), 0);
1653           pp_left_paren (cxx_pp);
1654           pp_right_paren (cxx_pp);
1655         }
1656       else
1657         {
1658           pp_left_brace (cxx_pp);
1659           dump_expr_list (CONSTRUCTOR_ELTS (t), flags);
1660           pp_right_brace (cxx_pp);
1661         }
1662
1663       break;
1664
1665     case OFFSET_REF:
1666       {
1667         tree ob = TREE_OPERAND (t, 0);
1668         if (is_dummy_object (ob))
1669           {
1670             t = TREE_OPERAND (t, 1);
1671             if (TREE_CODE (t) == FUNCTION_DECL)
1672               /* A::f */
1673               dump_expr (t, flags | TFF_EXPR_IN_PARENS);
1674             else if (BASELINK_P (t))
1675               dump_expr (OVL_CURRENT (BASELINK_FUNCTIONS (t)),
1676                          flags | TFF_EXPR_IN_PARENS);
1677             else
1678               dump_decl (t, flags);
1679           }
1680         else
1681           {
1682             if (TREE_CODE (ob) == INDIRECT_REF)
1683               {
1684                 dump_expr (TREE_OPERAND (ob, 0), flags | TFF_EXPR_IN_PARENS);
1685                 pp_string (cxx_pp, "->*");
1686               }
1687             else
1688               {
1689                 dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1690                 pp_string (cxx_pp, ".*");
1691               }
1692             dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1693           }
1694         break;
1695       }
1696
1697     case TEMPLATE_PARM_INDEX:
1698       dump_decl (TEMPLATE_PARM_DECL (t), flags & ~TFF_DECL_SPECIFIERS);
1699       break;
1700
1701     case SCOPE_REF:
1702       dump_type (TREE_OPERAND (t, 0), flags);
1703       pp_colon_colon (cxx_pp);
1704       dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1705       break;
1706
1707     case CAST_EXPR:
1708       if (TREE_OPERAND (t, 0) == NULL_TREE
1709           || TREE_CHAIN (TREE_OPERAND (t, 0)))
1710         {
1711           dump_type (TREE_TYPE (t), flags);
1712           pp_left_paren (cxx_pp);
1713           dump_expr_list (TREE_OPERAND (t, 0), flags);
1714           pp_right_paren (cxx_pp);
1715         }
1716       else
1717         {
1718           pp_left_paren (cxx_pp);
1719           dump_type (TREE_TYPE (t), flags);
1720           pp_string (cxx_pp, ")(");
1721           dump_expr_list (TREE_OPERAND (t, 0), flags);
1722           pp_right_paren (cxx_pp);
1723         }
1724       break;
1725
1726     case STATIC_CAST_EXPR:
1727       pp_string (cxx_pp, "static_cast<");
1728       goto cast;
1729     case REINTERPRET_CAST_EXPR:
1730       pp_string (cxx_pp, "reinterpret_cast<");
1731       goto cast;
1732     case CONST_CAST_EXPR:
1733       pp_string (cxx_pp, "const_cast<");
1734       goto cast;
1735     case DYNAMIC_CAST_EXPR:
1736       pp_string (cxx_pp, "dynamic_cast<");
1737     cast:
1738       dump_type (TREE_TYPE (t), flags);
1739       pp_string (cxx_pp, ">(");
1740       dump_expr (TREE_OPERAND (t, 0), flags);
1741       pp_right_paren (cxx_pp);
1742       break;
1743
1744     case ARROW_EXPR:
1745       dump_expr (TREE_OPERAND (t, 0), flags);
1746       pp_arrow (cxx_pp);
1747       break;
1748
1749     case SIZEOF_EXPR:
1750     case ALIGNOF_EXPR:
1751       if (TREE_CODE (t) == SIZEOF_EXPR)
1752         pp_string (cxx_pp, "sizeof (");
1753       else
1754         {
1755           my_friendly_assert (TREE_CODE (t) == ALIGNOF_EXPR, 0);
1756           pp_string (cxx_pp, "__alignof__ (");
1757         }
1758       if (TYPE_P (TREE_OPERAND (t, 0)))
1759         dump_type (TREE_OPERAND (t, 0), flags);
1760       else
1761         dump_expr (TREE_OPERAND (t, 0), flags);
1762       pp_right_paren (cxx_pp);
1763       break;
1764
1765     case REALPART_EXPR:
1766     case IMAGPART_EXPR:
1767       pp_identifier (cxx_pp, operator_name_info[TREE_CODE (t)].name);
1768       pp_space (cxx_pp);
1769       dump_expr (TREE_OPERAND (t, 0), flags);
1770       break;
1771
1772     case DEFAULT_ARG:
1773       pp_identifier (cxx_pp, "<unparsed>");
1774       break;
1775
1776     case TRY_CATCH_EXPR:
1777     case WITH_CLEANUP_EXPR:
1778     case CLEANUP_POINT_EXPR:
1779       dump_expr (TREE_OPERAND (t, 0), flags);
1780       break;
1781
1782     case PSEUDO_DTOR_EXPR:
1783       dump_expr (TREE_OPERAND (t, 2), flags);
1784       pp_dot (cxx_pp);
1785       dump_type (TREE_OPERAND (t, 0), flags);
1786       pp_colon_colon (cxx_pp);
1787       pp_complement (cxx_pp);
1788       dump_type (TREE_OPERAND (t, 1), flags);
1789       break;
1790
1791     case TEMPLATE_ID_EXPR:
1792       dump_decl (t, flags);
1793       break;
1794
1795     case STMT_EXPR:
1796       /* We don't yet have a way of dumping statements in a
1797          human-readable format.  */
1798       pp_string (cxx_pp, "({...})");
1799       break;
1800
1801     case BIND_EXPR:
1802       pp_left_brace (cxx_pp);
1803       dump_expr (TREE_OPERAND (t, 1), flags & ~TFF_EXPR_IN_PARENS);
1804       pp_right_brace (cxx_pp);
1805       break;
1806
1807     case LOOP_EXPR:
1808       pp_string (cxx_pp, "while (1) { ");
1809       dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1810       pp_right_brace (cxx_pp);
1811       break;
1812
1813     case EXIT_EXPR:
1814       pp_string (cxx_pp, "if (");
1815       dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1816       pp_string (cxx_pp, ") break; ");
1817       break;
1818
1819     case BASELINK:
1820       dump_expr (get_first_fn (t), flags & ~TFF_EXPR_IN_PARENS);
1821       break;
1822
1823     case EMPTY_CLASS_EXPR:
1824       dump_type (TREE_TYPE (t), flags);
1825       pp_left_paren (cxx_pp);
1826       pp_right_paren (cxx_pp);
1827       break;
1828
1829     case NON_DEPENDENT_EXPR:
1830       dump_expr (TREE_OPERAND (t, 0), flags);
1831       break;
1832
1833       /*  This list is incomplete, but should suffice for now.
1834           It is very important that `sorry' does not call
1835           `report_error_function'.  That could cause an infinite loop.  */
1836     default:
1837       pp_unsupported_tree (cxx_pp, t);
1838       /* fall through to ERROR_MARK...  */
1839     case ERROR_MARK:
1840       pp_identifier (cxx_pp, "<expression error>");
1841       break;
1842     }
1843 }
1844
1845 static void
1846 dump_binary_op (const char *opstring, tree t, int flags)
1847 {
1848   pp_left_paren (cxx_pp);
1849   dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1850   pp_space (cxx_pp);
1851   if (opstring)
1852     pp_identifier (cxx_pp, opstring);
1853   else
1854     pp_identifier (cxx_pp, "<unknown operator>");
1855   pp_space (cxx_pp);
1856   dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1857   pp_right_paren (cxx_pp);
1858 }
1859
1860 static void
1861 dump_unary_op (const char *opstring, tree t, int flags)
1862 {
1863   if (flags & TFF_EXPR_IN_PARENS)
1864     pp_left_paren (cxx_pp);
1865   pp_identifier (cxx_pp, opstring);
1866   dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1867   if (flags & TFF_EXPR_IN_PARENS)
1868     pp_right_paren (cxx_pp);
1869 }
1870
1871 /* Exported interface to stringifying types, exprs and decls under TFF_*
1872    control.  */
1873
1874 const char *
1875 type_as_string (tree typ, int flags)
1876 {
1877   pp_clear_output_area (cxx_pp);
1878   dump_type (typ, flags);
1879   return pp_formatted_text (cxx_pp);
1880 }
1881
1882 const char *
1883 expr_as_string (tree decl, int flags)
1884 {
1885   pp_clear_output_area (cxx_pp);
1886   dump_expr (decl, flags);
1887   return pp_formatted_text (cxx_pp);
1888 }
1889
1890 const char *
1891 decl_as_string (tree decl, int flags)
1892 {
1893   pp_clear_output_area (cxx_pp);
1894   dump_decl (decl, flags);
1895   return pp_formatted_text (cxx_pp);
1896 }
1897
1898 const char *
1899 context_as_string (tree context, int flags)
1900 {
1901   pp_clear_output_area (cxx_pp);
1902   dump_scope (context, flags);
1903   return pp_formatted_text (cxx_pp);
1904 }
1905
1906 /* Generate the three forms of printable names for cxx_printable_name.  */
1907
1908 const char *
1909 lang_decl_name (tree decl, int v)
1910 {
1911   if (v >= 2)
1912     return decl_as_string (decl, TFF_DECL_SPECIFIERS);
1913
1914   pp_clear_output_area (cxx_pp);
1915   if (v == 1 && DECL_CLASS_SCOPE_P (decl))
1916     {
1917       dump_type (CP_DECL_CONTEXT (decl), TFF_PLAIN_IDENTIFIER);
1918       pp_colon_colon (cxx_pp);
1919     }
1920
1921   if (TREE_CODE (decl) == FUNCTION_DECL)
1922     dump_function_name (decl, TFF_PLAIN_IDENTIFIER);
1923   else
1924     dump_decl (DECL_NAME (decl), TFF_PLAIN_IDENTIFIER);
1925
1926   return pp_formatted_text (cxx_pp);
1927 }
1928
1929 static location_t
1930 location_of (tree t)
1931 {
1932   if (TREE_CODE (t) == PARM_DECL && DECL_CONTEXT (t))
1933     t = DECL_CONTEXT (t);
1934   else if (TYPE_P (t))
1935     t = TYPE_MAIN_DECL (t);
1936   else if (TREE_CODE (t) == OVERLOAD)
1937     t = OVL_FUNCTION (t);
1938
1939   return DECL_SOURCE_LOCATION (t);
1940 }
1941
1942 /* Now the interfaces from error et al to dump_type et al. Each takes an
1943    on/off VERBOSE flag and supply the appropriate TFF_ flags to a dump_
1944    function.  */
1945
1946 static const char *
1947 decl_to_string (tree decl, int verbose)
1948 {
1949   int flags = 0;
1950
1951   if (TREE_CODE (decl) == TYPE_DECL || TREE_CODE (decl) == RECORD_TYPE
1952       || TREE_CODE (decl) == UNION_TYPE || TREE_CODE (decl) == ENUMERAL_TYPE)
1953     flags = TFF_CLASS_KEY_OR_ENUM;
1954   if (verbose)
1955     flags |= TFF_DECL_SPECIFIERS;
1956   else if (TREE_CODE (decl) == FUNCTION_DECL)
1957     flags |= TFF_DECL_SPECIFIERS | TFF_RETURN_TYPE;
1958   flags |= TFF_TEMPLATE_HEADER;
1959
1960   pp_clear_output_area (cxx_pp);
1961   dump_decl (decl, flags);
1962   return pp_formatted_text (cxx_pp);
1963 }
1964
1965 static const char *
1966 expr_to_string (tree decl)
1967 {
1968   pp_clear_output_area (cxx_pp);
1969   dump_expr (decl, 0);
1970   return pp_formatted_text (cxx_pp);
1971 }
1972
1973 static const char *
1974 fndecl_to_string (tree fndecl, int verbose)
1975 {
1976   int flags;
1977
1978   flags = TFF_EXCEPTION_SPECIFICATION | TFF_DECL_SPECIFIERS;
1979   if (verbose)
1980     flags |= TFF_FUNCTION_DEFAULT_ARGUMENTS;
1981   pp_clear_output_area (cxx_pp);
1982   dump_decl (fndecl, flags);
1983   return pp_formatted_text (cxx_pp);
1984 }
1985
1986
1987 static const char *
1988 code_to_string (enum tree_code c)
1989 {
1990   return tree_code_name [c];
1991 }
1992
1993 const char *
1994 language_to_string (enum languages c)
1995 {
1996   switch (c)
1997     {
1998     case lang_c:
1999       return "C";
2000
2001     case lang_cplusplus:
2002       return "C++";
2003
2004     case lang_java:
2005       return "Java";
2006
2007     default:
2008       abort ();
2009       return 0;
2010     }
2011 }
2012
2013 /* Return the proper printed version of a parameter to a C++ function.  */
2014
2015 static const char *
2016 parm_to_string (int p)
2017 {
2018   pp_clear_output_area (cxx_pp);
2019   if (p < 0)
2020     pp_string (cxx_pp, "'this'");
2021   else
2022     pp_decimal_int (cxx_pp, p + 1);
2023   return pp_formatted_text (cxx_pp);
2024 }
2025
2026 static const char *
2027 op_to_string (enum tree_code p)
2028 {
2029   tree id = operator_name_info[(int) p].identifier;
2030   return id ? IDENTIFIER_POINTER (id) : "<unknown>";
2031 }
2032
2033 static const char *
2034 type_to_string (tree typ, int verbose)
2035 {
2036   int flags = 0;
2037   if (verbose)
2038     flags |= TFF_CLASS_KEY_OR_ENUM;
2039   flags |= TFF_TEMPLATE_HEADER;
2040
2041   pp_clear_output_area (cxx_pp);
2042   dump_type (typ, flags);
2043   return pp_formatted_text (cxx_pp);
2044 }
2045
2046 static const char *
2047 assop_to_string (enum tree_code p)
2048 {
2049   tree id = assignment_operator_name_info[(int) p].identifier;
2050   return id ? IDENTIFIER_POINTER (id) : "{unknown}";
2051 }
2052
2053 static const char *
2054 args_to_string (tree p, int verbose)
2055 {
2056   int flags = 0;
2057   if (verbose)
2058     flags |= TFF_CLASS_KEY_OR_ENUM;
2059
2060   if (p == NULL_TREE)
2061     return "";
2062
2063   if (TYPE_P (TREE_VALUE (p)))
2064     return type_as_string (p, flags);
2065
2066   pp_clear_output_area (cxx_pp);
2067   for (; p; p = TREE_CHAIN (p))
2068     {
2069       if (TREE_VALUE (p) == null_node)
2070         pp_identifier (cxx_pp, "NULL");
2071       else
2072         dump_type (error_type (TREE_VALUE (p)), flags);
2073       if (TREE_CHAIN (p))
2074         pp_separate_with_comma (cxx_pp);
2075     }
2076   return pp_formatted_text (cxx_pp);
2077 }
2078
2079 static const char *
2080 cv_to_string (tree p, int v)
2081 {
2082   pp_clear_output_area (cxx_pp);
2083   pp_base (cxx_pp)->padding = v ? pp_before : pp_none;
2084   pp_cxx_cv_qualifier_seq (cxx_pp, p);
2085   return pp_formatted_text (cxx_pp);
2086 }
2087
2088 /* Langhook for print_error_function.  */
2089 void
2090 cxx_print_error_function (diagnostic_context *context, const char *file)
2091 {
2092   lhd_print_error_function (context, file);
2093   pp_base_set_prefix (context->printer, file);
2094   maybe_print_instantiation_context (context);
2095 }
2096
2097 static void
2098 cp_diagnostic_starter (diagnostic_context *context,
2099                        diagnostic_info *diagnostic)
2100 {
2101   diagnostic_report_current_module (context);
2102   cp_print_error_function (context, diagnostic);
2103   maybe_print_instantiation_context (context);
2104   pp_base_set_prefix (context->printer, diagnostic_build_prefix (diagnostic));
2105 }
2106
2107 static void
2108 cp_diagnostic_finalizer (diagnostic_context *context,
2109                          diagnostic_info *diagnostic ATTRIBUTE_UNUSED)
2110 {
2111   pp_base_destroy_prefix (context->printer);
2112 }
2113
2114 /* Print current function onto BUFFER, in the process of reporting
2115    a diagnostic message.  Called from cp_diagnostic_starter.  */
2116 static void
2117 cp_print_error_function (diagnostic_context *context,
2118                          diagnostic_info *diagnostic)
2119 {
2120   if (diagnostic_last_function_changed (context))
2121     {
2122       const char *old_prefix = context->printer->prefix;
2123       char *new_prefix = diagnostic->location.file
2124         ? file_name_as_prefix (diagnostic->location.file)
2125         : NULL;
2126
2127       pp_base_set_prefix (context->printer, new_prefix);
2128
2129       if (current_function_decl == NULL)
2130         pp_base_string (context->printer, "At global scope:");
2131       else
2132         pp_printf (context->printer, "In %s `%s':",
2133                    function_category (current_function_decl),
2134                    cxx_printable_name (current_function_decl, 2));
2135       pp_base_newline (context->printer);
2136
2137       diagnostic_set_last_function (context);
2138       pp_base_destroy_prefix (context->printer);
2139       context->printer->prefix = old_prefix;
2140     }
2141 }
2142
2143 /* Returns a description of FUNCTION using standard terminology.  */
2144 static const char *
2145 function_category (tree fn)
2146 {
2147   if (DECL_FUNCTION_MEMBER_P (fn))
2148     {
2149       if (DECL_STATIC_FUNCTION_P (fn))
2150         return "static member function";
2151       else if (DECL_COPY_CONSTRUCTOR_P (fn))
2152         return "copy constructor";
2153       else if (DECL_CONSTRUCTOR_P (fn))
2154         return "constructor";
2155       else if (DECL_DESTRUCTOR_P (fn))
2156         return "destructor";
2157       else
2158         return "member function";
2159     }
2160   else
2161     return "function";
2162 }
2163
2164 /* Report the full context of a current template instantiation,
2165    onto BUFFER.  */
2166 static void
2167 print_instantiation_full_context (diagnostic_context *context)
2168 {
2169   tree p = current_instantiation ();
2170   location_t location = input_location;
2171
2172   if (p)
2173     {
2174       if (current_function_decl != TINST_DECL (p)
2175           && current_function_decl != NULL_TREE)
2176         /* We can get here during the processing of some synthesized
2177            method.  Then, TINST_DECL (p) will be the function that's causing
2178            the synthesis.  */
2179         ;
2180       else
2181         {
2182           if (current_function_decl == TINST_DECL (p))
2183             /* Avoid redundancy with the the "In function" line.  */;
2184           else
2185             pp_verbatim (context->printer,
2186                          "%s: In instantiation of `%s':\n", location.file,
2187                          decl_as_string (TINST_DECL (p),
2188                                          TFF_DECL_SPECIFIERS | TFF_RETURN_TYPE));
2189
2190           location = *EXPR_LOCUS (p);
2191           p = TREE_CHAIN (p);
2192         }
2193     }
2194
2195   print_instantiation_partial_context (context, p, location);
2196 }
2197
2198 /* Same as above but less verbose.  */
2199 static void
2200 print_instantiation_partial_context (diagnostic_context *context,
2201                                      tree t, location_t loc)
2202 {
2203   for (; t; t = TREE_CHAIN (t))
2204     {
2205       pp_verbatim (context->printer, "%s:%d:   instantiated from `%s'\n",
2206                    loc.file, loc.line,
2207                    decl_as_string (TINST_DECL (t),
2208                                    TFF_DECL_SPECIFIERS | TFF_RETURN_TYPE));
2209       loc = *EXPR_LOCUS (t);
2210     }
2211   pp_verbatim (context->printer, "%s:%d:   instantiated from here\n",
2212                loc.file, loc.line);
2213 }
2214
2215 /* Called from cp_thing to print the template context for an error.  */
2216 static void
2217 maybe_print_instantiation_context (diagnostic_context *context)
2218 {
2219   if (!problematic_instantiation_changed () || current_instantiation () == 0)
2220     return;
2221
2222   record_last_problematic_instantiation ();
2223   print_instantiation_full_context (context);
2224 }
2225
2226 /* Report the bare minimum context of a template instantiation.  */
2227 void
2228 print_instantiation_context (void)
2229 {
2230   print_instantiation_partial_context
2231     (global_dc, current_instantiation (), input_location);
2232   diagnostic_flush_buffer (global_dc);
2233 }
2234 \f
2235 /* Called from output_format -- during diagnostic message processing --
2236    to handle C++ specific format specifier with the following meanings:
2237    %A   function argument-list.
2238    %C   tree code.
2239    %D   declaration.
2240    %E   expression.
2241    %F   function declaration.
2242    %L   language as used in extern "lang".
2243    %O   binary operator.
2244    %P   function parameter whose position is indicated by an integer.
2245    %Q   assignment operator.
2246    %T   type.
2247    %V   cv-qualifier.  */
2248 static bool
2249 cp_printer (pretty_printer *pp, text_info *text)
2250 {
2251   int verbose = 0;
2252   const char *result;
2253 #define next_tree    va_arg (*text->args_ptr, tree)
2254 #define next_tcode   va_arg (*text->args_ptr, enum tree_code)
2255 #define next_lang    va_arg (*text->args_ptr, enum languages)
2256 #define next_int     va_arg (*text->args_ptr, int)
2257
2258   if (*text->format_spec == '+')
2259     ++text->format_spec;
2260   if (*text->format_spec == '#')
2261     {
2262       verbose = 1;
2263       ++text->format_spec;
2264     }
2265
2266   switch (*text->format_spec)
2267     {
2268     case 'A': result = args_to_string (next_tree, verbose);     break;
2269     case 'C': result = code_to_string (next_tcode);             break;
2270     case 'D': result = decl_to_string (next_tree, verbose);     break;
2271     case 'E': result = expr_to_string (next_tree);              break;
2272     case 'F': result = fndecl_to_string (next_tree, verbose);   break;
2273     case 'L': result = language_to_string (next_lang);          break;
2274     case 'O': result = op_to_string (next_tcode);               break;
2275     case 'P': result = parm_to_string (next_int);               break;
2276     case 'Q': result = assop_to_string (next_tcode);            break;
2277     case 'T': result = type_to_string (next_tree, verbose);     break;
2278     case 'V': result = cv_to_string (next_tree, verbose);       break;
2279
2280     default:
2281       return false;
2282     }
2283
2284   pp_base_string (pp, result);
2285   return true;
2286 #undef next_tree
2287 #undef next_tcode
2288 #undef next_lang
2289 #undef next_int
2290 }
2291
2292 static void
2293 pp_non_consecutive_character (cxx_pretty_printer *pp, int c)
2294 {
2295   const char *p = pp_last_position_in_text (pp);
2296
2297   if (p != NULL && *p == c)
2298     pp_space (pp);
2299   pp_character (pp, c);
2300 }
2301
2302 /* These are temporary wrapper functions which handle the historic
2303    behavior of cp_*_at.  */
2304
2305 static tree
2306 locate_error (const char *msgid, va_list ap)
2307 {
2308   tree here = 0, t;
2309   int plus = 0;
2310   const char *f;
2311
2312   for (f = msgid; *f; f++)
2313     {
2314       plus = 0;
2315       if (*f == '%')
2316         {
2317           f++;
2318           if (*f == '+')
2319             f++, plus = 1;
2320           if (*f == '#')
2321             f++;
2322
2323           switch (*f)
2324             {
2325               /* Just ignore these possibilities.  */
2326             case '%':                                           break;
2327             case 'P':
2328             case 'd':   (void) va_arg (ap, int);                break;
2329             case 's':   (void) va_arg (ap, char *);             break;
2330             case 'L':   (void) va_arg (ap, enum languages);     break;
2331             case 'C':
2332             case 'O':
2333             case 'Q':   (void) va_arg (ap, enum tree_code);     break;
2334
2335               /* These take a tree, which may be where the error is
2336                  located.  */
2337             case 'A':
2338             case 'D':
2339             case 'E':
2340             case 'F':
2341             case 'T':
2342             case 'V':
2343               t = va_arg (ap, tree);
2344               if (!here || plus)
2345                 here = t;
2346               break;
2347
2348             default:
2349               errorcount = 0;  /* damn ICE suppression */
2350               internal_error ("unexpected letter `%c' in locate_error\n", *f);
2351             }
2352         }
2353     }
2354
2355   if (here == 0)
2356     here = va_arg (ap, tree);
2357
2358   return here;
2359 }
2360
2361
2362 void
2363 cp_error_at (const char *msgid, ...)
2364 {
2365   tree here;
2366   diagnostic_info diagnostic;
2367   va_list ap;
2368
2369   va_start (ap, msgid);
2370   here = locate_error (msgid, ap);
2371   va_end (ap);
2372
2373   va_start (ap, msgid);
2374   diagnostic_set_info (&diagnostic, msgid, &ap,
2375                        location_of (here), DK_ERROR);
2376   report_diagnostic (&diagnostic);
2377   va_end (ap);
2378 }
2379
2380 void
2381 cp_warning_at (const char *msgid, ...)
2382 {
2383   tree here;
2384   diagnostic_info diagnostic;
2385   va_list ap;
2386
2387   va_start (ap, msgid);
2388   here = locate_error (msgid, ap);
2389   va_end (ap);
2390
2391   va_start (ap, msgid);
2392   diagnostic_set_info (&diagnostic, msgid, &ap,
2393                        location_of (here), DK_WARNING);
2394   report_diagnostic (&diagnostic);
2395   va_end (ap);
2396 }
2397
2398 void
2399 cp_pedwarn_at (const char *msgid, ...)
2400 {
2401   tree here;
2402   diagnostic_info diagnostic;
2403   va_list ap;
2404
2405   va_start (ap, msgid);
2406   here = locate_error (msgid, ap);
2407   va_end (ap);
2408
2409   va_start (ap, msgid);
2410   diagnostic_set_info (&diagnostic, msgid, &ap,
2411                        location_of (here), pedantic_error_kind());
2412   report_diagnostic (&diagnostic);
2413   va_end (ap);
2414 }