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, 2005 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, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, 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_separate_with_comma(PP) pp_cxx_separate_with (PP, ',')
  36
  37 /* The global buffer where we dump everything.  It is there only for
  38    transitional purpose.  It is expected, in the near future, to be
  39    completely removed.  */
  40 static cxx_pretty_printer scratch_pretty_printer;
  41 #define cxx_pp (&scratch_pretty_printer)
  42
  43 # define NEXT_CODE(T) (TREE_CODE (TREE_TYPE (T)))
  44
  45 static const char *args_to_string (tree, int);
  46 static const char *assop_to_string (enum tree_code);
  47 static const char *code_to_string (enum tree_code);
  48 static const char *cv_to_string (tree, int);
  49 static const char *decl_to_string (tree, int);
  50 static const char *expr_to_string (tree);
  51 static const char *fndecl_to_string (tree, int);
  52 static const char *op_to_string (enum tree_code);
  53 static const char *parm_to_string (int);
  54 static const char *type_to_string (tree, int);
  55
  56 static void dump_type (tree, int);
  57 static void dump_typename (tree, int);
  58 static void dump_simple_decl (tree, tree, int);
  59 static void dump_decl (tree, int);
  60 static void dump_template_decl (tree, int);
  61 static void dump_function_decl (tree, int);
  62 static void dump_expr (tree, int);
  63 static void dump_unary_op (const char *, tree, int);
  64 static void dump_binary_op (const char *, tree, int);
  65 static void dump_aggr_type (tree, int);
  66 static void dump_type_prefix (tree, int);
  67 static void dump_type_suffix (tree, int);
  68 static void dump_function_name (tree, int);
  69 static void dump_expr_list (tree, int);
  70 static void dump_global_iord (tree);
  71 static void dump_parameters (tree, int);
  72 static void dump_exception_spec (tree, int);
  73 static void dump_template_argument (tree, int);
  74 static void dump_template_argument_list (tree, int);
  75 static void dump_template_parameter (tree, int);
  76 static void dump_template_bindings (tree, tree);
  77 static void dump_scope (tree, int);
  78 static void dump_template_parms (tree, int, int);
  79
  80 static const char *function_category (tree);
  81 static void maybe_print_instantiation_context (diagnostic_context *);
  82 static void print_instantiation_full_context (diagnostic_context *);
  83 static void print_instantiation_partial_context (diagnostic_context *,
  84                                                  tree, location_t);
  85 static void cp_diagnostic_starter (diagnostic_context *, diagnostic_info *);
  86 static void cp_diagnostic_finalizer (diagnostic_context *, diagnostic_info *);
  87 static void cp_print_error_function (diagnostic_context *, diagnostic_info *);
  88
  89 static bool cp_printer (pretty_printer *, text_info *, const char *,
  90                         int, bool, bool, bool);
  91 static location_t location_of (tree);
  92
  93 void
  94 init_error (void)
  95 {
  96   diagnostic_starter (global_dc) = cp_diagnostic_starter;
  97   diagnostic_finalizer (global_dc) = cp_diagnostic_finalizer;
  98   diagnostic_format_decoder (global_dc) = cp_printer;
  99
 100   pp_construct (pp_base (cxx_pp), NULL, 0);
 101   pp_cxx_pretty_printer_init (cxx_pp);
 102 }
 103
 104 /* Dump a scope, if deemed necessary.  */
 105
 106 static void
 107 dump_scope (tree scope, int flags)
 108 {
 109   int f = ~TFF_RETURN_TYPE & (flags & (TFF_SCOPE | TFF_CHASE_TYPEDEF));
 110
 111   if (scope == NULL_TREE)
 112     return;
 113
 114   if (TREE_CODE (scope) == NAMESPACE_DECL)
 115     {
 116       if (scope != global_namespace)
 117         {
 118           dump_decl (scope, f);
 119           pp_cxx_colon_colon (cxx_pp);
 120         }
 121     }
 122   else if (AGGREGATE_TYPE_P (scope))
 123     {
 124       dump_type (scope, f);
 125       pp_cxx_colon_colon (cxx_pp);
 126     }
 127   else if ((flags & TFF_SCOPE) && TREE_CODE (scope) == FUNCTION_DECL)
 128     {
 129       dump_function_decl (scope, f);
 130       pp_cxx_colon_colon (cxx_pp);
 131     }
 132 }
 133
 134 /* Dump the template ARGument under control of FLAGS.  */
 135
 136 static void
 137 dump_template_argument (tree arg, int flags)
 138 {
 139   if (TYPE_P (arg) || TREE_CODE (arg) == TEMPLATE_DECL)
 140     dump_type (arg, flags & ~TFF_CLASS_KEY_OR_ENUM);
 141   else
 142     dump_expr (arg, (flags | TFF_EXPR_IN_PARENS) & ~TFF_CLASS_KEY_OR_ENUM);
 143 }
 144
 145 /* Dump a template-argument-list ARGS (always a TREE_VEC) under control
 146    of FLAGS.  */
 147
 148 static void
 149 dump_template_argument_list (tree args, int flags)
 150 {
 151   int n = TREE_VEC_LENGTH (args);
 152   int need_comma = 0;
 153   int i;
 154
 155   for (i = 0; i< n; ++i)
 156     {
 157       if (need_comma)
 158         pp_separate_with_comma (cxx_pp);
 159       dump_template_argument (TREE_VEC_ELT (args, i), flags);
 160       need_comma = 1;
 161     }
 162 }
 163
 164 /* Dump a template parameter PARM (a TREE_LIST) under control of FLAGS.  */
 165
 166 static void
 167 dump_template_parameter (tree parm, int flags)
 168 {
 169   tree p;
 170   tree a;
 171
 172   if (parm == error_mark_node)
 173    return;
 174
 175   p = TREE_VALUE (parm);
 176   a = TREE_PURPOSE (parm);
 177
 178   if (TREE_CODE (p) == TYPE_DECL)
 179     {
 180       if (flags & TFF_DECL_SPECIFIERS)
 181         {
 182           pp_cxx_identifier (cxx_pp, "class");
 183           if (DECL_NAME (p))
 184             pp_cxx_tree_identifier (cxx_pp, DECL_NAME (p));
 185         }
 186       else if (DECL_NAME (p))
 187         pp_cxx_tree_identifier (cxx_pp, DECL_NAME (p));
 188       else
 189         pp_cxx_canonical_template_parameter (cxx_pp, TREE_TYPE (p));
 190     }
 191   else
 192     dump_decl (p, flags | TFF_DECL_SPECIFIERS);
 193
 194   if ((flags & TFF_FUNCTION_DEFAULT_ARGUMENTS) && a != NULL_TREE)
 195     {
 196       pp_cxx_whitespace (cxx_pp);
 197       pp_equal (cxx_pp);
 198       pp_cxx_whitespace (cxx_pp);
 199       if (TREE_CODE (p) == TYPE_DECL || TREE_CODE (p) == TEMPLATE_DECL)
 200         dump_type (a, flags & ~TFF_CHASE_TYPEDEF);
 201       else
 202         dump_expr (a, flags | TFF_EXPR_IN_PARENS);
 203     }
 204 }
 205
 206 /* Dump, under control of FLAGS, a template-parameter-list binding.
 207    PARMS is a TREE_LIST of TREE_VEC of TREE_LIST and ARGS is a
 208    TREE_VEC.  */
 209
 210 static void
 211 dump_template_bindings (tree parms, tree args)
 212 {
 213   int need_comma = 0;
 214
 215   while (parms)
 216     {
 217       tree p = TREE_VALUE (parms);
 218       int lvl = TMPL_PARMS_DEPTH (parms);
 219       int arg_idx = 0;
 220       int i;
 221
 222       for (i = 0; i < TREE_VEC_LENGTH (p); ++i)
 223         {
 224           tree arg = NULL_TREE;
 225
 226           /* Don't crash if we had an invalid argument list.  */
 227           if (TMPL_ARGS_DEPTH (args) >= lvl)
 228             {
 229               tree lvl_args = TMPL_ARGS_LEVEL (args, lvl);
 230               if (NUM_TMPL_ARGS (lvl_args) > arg_idx)
 231                 arg = TREE_VEC_ELT (lvl_args, arg_idx);
 232             }
 233
 234           if (need_comma)
 235             pp_separate_with_comma (cxx_pp);
 236           dump_template_parameter (TREE_VEC_ELT (p, i), TFF_PLAIN_IDENTIFIER);
 237           pp_cxx_whitespace (cxx_pp);
 238           pp_equal (cxx_pp);
 239           pp_cxx_whitespace (cxx_pp);
 240           if (arg)
 241             dump_template_argument (arg, TFF_PLAIN_IDENTIFIER);
 242           else
 243             pp_identifier (cxx_pp, "<missing>");
 244
 245           ++arg_idx;
 246           need_comma = 1;
 247         }
 248
 249       parms = TREE_CHAIN (parms);
 250     }
 251 }
 252
 253 /* Dump a human-readable equivalent of TYPE.  FLAGS controls the
 254    format.  */
 255
 256 static void
 257 dump_type (tree t, int flags)
 258 {
 259   if (t == NULL_TREE)
 260     return;
 261
 262   if (TYPE_PTRMEMFUNC_P (t))
 263     goto offset_type;
 264
 265   switch (TREE_CODE (t))
 266     {
 267     case UNKNOWN_TYPE:
 268       pp_identifier (cxx_pp, "<unresolved overloaded function type>");
 269       break;
 270
 271     case TREE_LIST:
 272       /* A list of function parms.  */
 273       dump_parameters (t, flags);
 274       break;
 275
 276     case IDENTIFIER_NODE:
 277       pp_cxx_tree_identifier (cxx_pp, t);
 278       break;
 279
 280     case TREE_BINFO:
 281       dump_type (BINFO_TYPE (t), flags);
 282       break;
 283
 284     case RECORD_TYPE:
 285     case UNION_TYPE:
 286     case ENUMERAL_TYPE:
 287       dump_aggr_type (t, flags);
 288       break;
 289
 290     case TYPE_DECL:
 291       if (flags & TFF_CHASE_TYPEDEF)
 292         {
 293           dump_type (DECL_ORIGINAL_TYPE (t)
 294                      ? DECL_ORIGINAL_TYPE (t) : TREE_TYPE (t), flags);
 295           break;
 296         }
 297       /* Else fall through.  */
 298
 299     case TEMPLATE_DECL:
 300     case NAMESPACE_DECL:
 301       dump_decl (t, flags & ~TFF_DECL_SPECIFIERS);
 302       break;
 303
 304     case INTEGER_TYPE:
 305     case REAL_TYPE:
 306     case VOID_TYPE:
 307     case BOOLEAN_TYPE:
 308     case COMPLEX_TYPE:
 309     case VECTOR_TYPE:
 310       pp_type_specifier_seq (cxx_pp, t);
 311       break;
 312
 313     case TEMPLATE_TEMPLATE_PARM:
 314       /* For parameters inside template signature.  */
 315       if (TYPE_IDENTIFIER (t))
 316         pp_cxx_tree_identifier (cxx_pp, TYPE_IDENTIFIER (t));
 317       else
 318         pp_cxx_canonical_template_parameter (cxx_pp, t);
 319       break;
 320
 321     case BOUND_TEMPLATE_TEMPLATE_PARM:
 322       {
 323         tree args = TYPE_TI_ARGS (t);
 324         pp_cxx_cv_qualifier_seq (cxx_pp, t);
 325         pp_cxx_tree_identifier (cxx_pp, TYPE_IDENTIFIER (t));
 326         pp_cxx_begin_template_argument_list (cxx_pp);
 327         dump_template_argument_list (args, flags);
 328         pp_cxx_end_template_argument_list (cxx_pp);
 329       }
 330       break;
 331
 332     case TEMPLATE_TYPE_PARM:
 333       pp_cxx_cv_qualifier_seq (cxx_pp, t);
 334       if (TYPE_IDENTIFIER (t))
 335         pp_cxx_tree_identifier (cxx_pp, TYPE_IDENTIFIER (t));
 336       else
 337         pp_cxx_canonical_template_parameter
 338           (cxx_pp, TEMPLATE_TYPE_PARM_INDEX (t));
 339       break;
 340
 341       /* This is not always necessary for pointers and such, but doing this
 342          reduces code size.  */
 343     case ARRAY_TYPE:
 344     case POINTER_TYPE:
 345     case REFERENCE_TYPE:
 346     case OFFSET_TYPE:
 347     offset_type:
 348     case FUNCTION_TYPE:
 349     case METHOD_TYPE:
 350     {
 351       dump_type_prefix (t, flags);
 352       dump_type_suffix (t, flags);
 353       break;
 354     }
 355     case TYPENAME_TYPE:
 356       pp_cxx_cv_qualifier_seq (cxx_pp, t);
 357       pp_cxx_identifier (cxx_pp,
 358                          TYPENAME_IS_ENUM_P (t) ? "enum"
 359                          : TYPENAME_IS_CLASS_P (t) ? "class"
 360                          : "typename");
 361       dump_typename (t, flags);
 362       break;
 363
 364     case UNBOUND_CLASS_TEMPLATE:
 365       dump_type (TYPE_CONTEXT (t), flags);
 366       pp_cxx_colon_colon (cxx_pp);
 367       pp_cxx_identifier (cxx_pp, "template");
 368       dump_type (DECL_NAME (TYPE_NAME (t)), flags);
 369       break;
 370
 371     case TYPEOF_TYPE:
 372       pp_cxx_identifier (cxx_pp, "__typeof__");
 373       pp_cxx_whitespace (cxx_pp);
 374       pp_cxx_left_paren (cxx_pp);
 375       dump_expr (TYPEOF_TYPE_EXPR (t), flags & ~TFF_EXPR_IN_PARENS);
 376       pp_cxx_right_paren (cxx_pp);
 377       break;
 378
 379     default:
 380       pp_unsupported_tree (cxx_pp, t);
 381       /* Fall through to error.  */
 382
 383     case ERROR_MARK:
 384       pp_identifier (cxx_pp, "<type error>");
 385       break;
 386     }
 387 }
 388
 389 /* Dump a TYPENAME_TYPE. We need to notice when the context is itself
 390    a TYPENAME_TYPE.  */
 391
 392 static void
 393 dump_typename (tree t, int flags)
 394 {
 395   tree ctx = TYPE_CONTEXT (t);
 396
 397   if (TREE_CODE (ctx) == TYPENAME_TYPE)
 398     dump_typename (ctx, flags);
 399   else
 400     dump_type (ctx, flags & ~TFF_CLASS_KEY_OR_ENUM);
 401   pp_cxx_colon_colon (cxx_pp);
 402   dump_decl (TYPENAME_TYPE_FULLNAME (t), flags);
 403 }
 404
 405 /* Return the name of the supplied aggregate, or enumeral type.  */
 406
 407 const char *
 408 class_key_or_enum_as_string (tree t)
 409 {
 410   if (TREE_CODE (t) == ENUMERAL_TYPE)
 411     return "enum";
 412   else if (TREE_CODE (t) == UNION_TYPE)
 413     return "union";
 414   else if (TYPE_LANG_SPECIFIC (t) && CLASSTYPE_DECLARED_CLASS (t))
 415     return "class";
 416   else
 417     return "struct";
 418 }
 419
 420 /* Print out a class declaration T under the control of FLAGS,
 421    in the form `class foo'.  */
 422
 423 static void
 424 dump_aggr_type (tree t, int flags)
 425 {
 426   tree name;
 427   const char *variety = class_key_or_enum_as_string (t);
 428   int typdef = 0;
 429   int tmplate = 0;
 430
 431   pp_cxx_cv_qualifier_seq (cxx_pp, t);
 432
 433   if (flags & TFF_CLASS_KEY_OR_ENUM)
 434     pp_cxx_identifier (cxx_pp, variety);
 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                 && (TREE_CODE (CLASSTYPE_TI_TEMPLATE (t)) != TEMPLATE_DECL
 447                     || PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)));
 448       dump_scope (CP_DECL_CONTEXT (name), flags | TFF_SCOPE);
 449       if (tmplate)
 450         {
 451           /* Because the template names are mangled, we have to locate
 452              the most general template, and use that name.  */
 453           tree tpl = CLASSTYPE_TI_TEMPLATE (t);
 454
 455           while (DECL_TEMPLATE_INFO (tpl))
 456             tpl = DECL_TI_TEMPLATE (tpl);
 457           name = tpl;
 458         }
 459       name = DECL_NAME (name);
 460     }
 461
 462   if (name == 0 || ANON_AGGRNAME_P (name))
 463     {
 464       if (flags & TFF_CLASS_KEY_OR_ENUM)
 465         pp_identifier (cxx_pp, "<anonymous>");
 466       else
 467         pp_printf (pp_base (cxx_pp), "<anonymous %s>", variety);
 468     }
 469   else
 470     pp_cxx_tree_identifier (cxx_pp, name);
 471   if (tmplate)
 472     dump_template_parms (TYPE_TEMPLATE_INFO (t),
 473                          !CLASSTYPE_USE_TEMPLATE (t),
 474                          flags & ~TFF_TEMPLATE_HEADER);
 475 }
 476
 477 /* Dump into the obstack the initial part of the output for a given type.
 478    This is necessary when dealing with things like functions returning
 479    functions.  Examples:
 480
 481    return type of `int (* fee ())()': pointer -> function -> int.  Both
 482    pointer (and reference and offset) and function (and member) types must
 483    deal with prefix and suffix.
 484
 485    Arrays must also do this for DECL nodes, like int a[], and for things like
 486    int *[]&.  */
 487
 488 static void
 489 dump_type_prefix (tree t, int flags)
 490 {
 491   if (TYPE_PTRMEMFUNC_P (t))
 492     {
 493       t = TYPE_PTRMEMFUNC_FN_TYPE (t);
 494       goto offset_type;
 495     }
 496
 497   switch (TREE_CODE (t))
 498     {
 499     case POINTER_TYPE:
 500     case REFERENCE_TYPE:
 501       {
 502         tree sub = TREE_TYPE (t);
 503
 504         dump_type_prefix (sub, flags);
 505         if (TREE_CODE (sub) == ARRAY_TYPE)
 506           {
 507             pp_cxx_whitespace (cxx_pp);
 508             pp_cxx_left_paren (cxx_pp);
 509           }
 510         pp_character (cxx_pp, "&*"[TREE_CODE (t) == POINTER_TYPE]);
 511         pp_base (cxx_pp)->padding = pp_before;
 512         pp_cxx_cv_qualifier_seq (cxx_pp, t);
 513       }
 514       break;
 515
 516     case OFFSET_TYPE:
 517     offset_type:
 518       dump_type_prefix (TREE_TYPE (t), flags);
 519       if (TREE_CODE (t) == OFFSET_TYPE) /* pmfs deal with this in d_t_p */
 520         {
 521           pp_maybe_space (cxx_pp);
 522           if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE)
 523              pp_cxx_left_paren (cxx_pp);
 524           dump_type (TYPE_OFFSET_BASETYPE (t), flags);
 525           pp_cxx_colon_colon (cxx_pp);
 526         }
 527       pp_cxx_star (cxx_pp);
 528       pp_cxx_cv_qualifier_seq (cxx_pp, t);
 529       pp_base (cxx_pp)->padding = pp_before;
 530       break;
 531
 532       /* Can only be reached through function pointer -- this would not be
 533          correct if FUNCTION_DECLs used it.  */
 534     case FUNCTION_TYPE:
 535       dump_type_prefix (TREE_TYPE (t), flags);
 536       pp_maybe_space (cxx_pp);
 537       pp_cxx_left_paren (cxx_pp);
 538       break;
 539
 540     case METHOD_TYPE:
 541       dump_type_prefix (TREE_TYPE (t), flags);
 542       pp_maybe_space (cxx_pp);
 543       pp_cxx_left_paren (cxx_pp);
 544       dump_aggr_type (TYPE_METHOD_BASETYPE (t), flags);
 545       pp_cxx_colon_colon (cxx_pp);
 546       break;
 547
 548     case ARRAY_TYPE:
 549       dump_type_prefix (TREE_TYPE (t), flags);
 550       break;
 551
 552     case ENUMERAL_TYPE:
 553     case IDENTIFIER_NODE:
 554     case INTEGER_TYPE:
 555     case BOOLEAN_TYPE:
 556     case REAL_TYPE:
 557     case RECORD_TYPE:
 558     case TEMPLATE_TYPE_PARM:
 559     case TEMPLATE_TEMPLATE_PARM:
 560     case BOUND_TEMPLATE_TEMPLATE_PARM:
 561     case TREE_LIST:
 562     case TYPE_DECL:
 563     case TREE_VEC:
 564     case UNION_TYPE:
 565     case UNKNOWN_TYPE:
 566     case VOID_TYPE:
 567     case TYPENAME_TYPE:
 568     case COMPLEX_TYPE:
 569     case VECTOR_TYPE:
 570     case TYPEOF_TYPE:
 571       dump_type (t, flags);
 572       pp_base (cxx_pp)->padding = pp_before;
 573       break;
 574
 575     default:
 576       pp_unsupported_tree (cxx_pp, t);
 577       /* fall through.  */
 578     case ERROR_MARK:
 579       pp_identifier (cxx_pp, "<typeprefixerror>");
 580       break;
 581     }
 582 }
 583
 584 /* Dump the suffix of type T, under control of FLAGS.  This is the part
 585    which appears after the identifier (or function parms).  */
 586
 587 static void
 588 dump_type_suffix (tree t, int flags)
 589 {
 590   if (TYPE_PTRMEMFUNC_P (t))
 591     t = TYPE_PTRMEMFUNC_FN_TYPE (t);
 592
 593   switch (TREE_CODE (t))
 594     {
 595     case POINTER_TYPE:
 596     case REFERENCE_TYPE:
 597     case OFFSET_TYPE:
 598       if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE)
 599         pp_cxx_right_paren (cxx_pp);
 600       dump_type_suffix (TREE_TYPE (t), flags);
 601       break;
 602
 603       /* Can only be reached through function pointer.  */
 604     case FUNCTION_TYPE:
 605     case METHOD_TYPE:
 606       {
 607         tree arg;
 608         pp_cxx_right_paren (cxx_pp);
 609         arg = TYPE_ARG_TYPES (t);
 610         if (TREE_CODE (t) == METHOD_TYPE)
 611           arg = TREE_CHAIN (arg);
 612
 613         /* Function pointers don't have default args.  Not in standard C++,
 614            anyway; they may in g++, but we'll just pretend otherwise.  */
 615         dump_parameters (arg, flags & ~TFF_FUNCTION_DEFAULT_ARGUMENTS);
 616
 617         if (TREE_CODE (t) == METHOD_TYPE)
 618           pp_cxx_cv_qualifier_seq
 619             (cxx_pp, TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (t))));
 620         else
 621           pp_cxx_cv_qualifier_seq(cxx_pp, t);
 622         dump_exception_spec (TYPE_RAISES_EXCEPTIONS (t), flags);
 623         dump_type_suffix (TREE_TYPE (t), flags);
 624         break;
 625       }
 626
 627     case ARRAY_TYPE:
 628       pp_maybe_space (cxx_pp);
 629       pp_cxx_left_bracket (cxx_pp);
 630       if (TYPE_DOMAIN (t))
 631         {
 632           if (host_integerp (TYPE_MAX_VALUE (TYPE_DOMAIN (t)), 0))
 633             pp_wide_integer
 634               (cxx_pp, tree_low_cst (TYPE_MAX_VALUE (TYPE_DOMAIN (t)), 0) + 1);
 635           else if (TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (t))) == MINUS_EXPR)
 636             dump_expr (TREE_OPERAND (TYPE_MAX_VALUE (TYPE_DOMAIN (t)), 0),
 637                        flags & ~TFF_EXPR_IN_PARENS);
 638           else
 639             dump_expr (fold (cp_build_binary_op
 640                              (PLUS_EXPR, TYPE_MAX_VALUE (TYPE_DOMAIN (t)),
 641                               integer_one_node)),
 642                        flags & ~TFF_EXPR_IN_PARENS);
 643         }
 644       pp_cxx_right_bracket (cxx_pp);
 645       dump_type_suffix (TREE_TYPE (t), flags);
 646       break;
 647
 648     case ENUMERAL_TYPE:
 649     case IDENTIFIER_NODE:
 650     case INTEGER_TYPE:
 651     case BOOLEAN_TYPE:
 652     case REAL_TYPE:
 653     case RECORD_TYPE:
 654     case TEMPLATE_TYPE_PARM:
 655     case TEMPLATE_TEMPLATE_PARM:
 656     case BOUND_TEMPLATE_TEMPLATE_PARM:
 657     case TREE_LIST:
 658     case TYPE_DECL:
 659     case TREE_VEC:
 660     case UNION_TYPE:
 661     case UNKNOWN_TYPE:
 662     case VOID_TYPE:
 663     case TYPENAME_TYPE:
 664     case COMPLEX_TYPE:
 665     case VECTOR_TYPE:
 666     case TYPEOF_TYPE:
 667       break;
 668
 669     default:
 670       pp_unsupported_tree (cxx_pp, t);
 671     case ERROR_MARK:
 672       /* Don't mark it here, we should have already done in
 673          dump_type_prefix.  */
 674       break;
 675     }
 676 }
 677
 678 static void
 679 dump_global_iord (tree t)
 680 {
 681   const char *p = NULL;
 682
 683   if (DECL_GLOBAL_CTOR_P (t))
 684     p = "initializers";
 685   else if (DECL_GLOBAL_DTOR_P (t))
 686     p = "destructors";
 687   else
 688     gcc_unreachable ();
 689
 690   pp_printf (pp_base (cxx_pp), "(static %s for %s)", p, input_filename);
 691 }
 692
 693 static void
 694 dump_simple_decl (tree t, tree type, int flags)
 695 {
 696   if (flags & TFF_DECL_SPECIFIERS)
 697     {
 698       dump_type_prefix (type, flags);
 699       pp_maybe_space (cxx_pp);
 700     }
 701   if (!DECL_INITIAL (t) || TREE_CODE (DECL_INITIAL (t)) != TEMPLATE_PARM_INDEX)
 702     dump_scope (CP_DECL_CONTEXT (t), flags);
 703   if (DECL_NAME (t))
 704     dump_decl (DECL_NAME (t), flags);
 705   else
 706     pp_identifier (cxx_pp, "<anonymous>");
 707   if (flags & TFF_DECL_SPECIFIERS)
 708     dump_type_suffix (type, flags);
 709 }
 710
 711 /* Dump a human readable string for the decl T under control of FLAGS.  */
 712
 713 static void
 714 dump_decl (tree t, int flags)
 715 {
 716   if (t == NULL_TREE)
 717     return;
 718
 719   switch (TREE_CODE (t))
 720     {
 721     case TYPE_DECL:
 722       /* Don't say 'typedef class A' */
 723       if (DECL_ARTIFICIAL (t))
 724         {
 725           if ((flags & TFF_DECL_SPECIFIERS)
 726               && TREE_CODE (TREE_TYPE (t)) == TEMPLATE_TYPE_PARM)
 727             /* Say `class T' not just `T'.  */
 728             pp_cxx_identifier (cxx_pp, "class");
 729
 730           dump_type (TREE_TYPE (t), flags);
 731           break;
 732         }
 733       if (flags & TFF_DECL_SPECIFIERS)
 734         pp_cxx_identifier (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           gcc_assert (TYPE_P (DECL_CONTEXT (t)));
 745           dump_type (DECL_CONTEXT (t), flags);
 746           break;
 747         }
 748       /* Else fall through.  */
 749     case FIELD_DECL:
 750     case PARM_DECL:
 751       dump_simple_decl (t, TREE_TYPE (t), flags);
 752       break;
 753
 754     case RESULT_DECL:
 755       pp_string (cxx_pp, "<return value> ");
 756       dump_simple_decl (t, TREE_TYPE (t), flags);
 757       break;
 758
 759     case NAMESPACE_DECL:
 760       if (flags & TFF_DECL_SPECIFIERS)
 761         pp_cxx_declaration (cxx_pp, t);
 762       else
 763         {
 764           dump_scope (CP_DECL_CONTEXT (t), flags);
 765           if (DECL_NAME (t) == NULL_TREE)
 766             pp_identifier (cxx_pp, "<unnamed>");
 767           else
 768             pp_cxx_tree_identifier (cxx_pp, DECL_NAME (t));
 769         }
 770       break;
 771
 772     case SCOPE_REF:
 773       pp_expression (cxx_pp, t);
 774       break;
 775
 776     case ARRAY_REF:
 777       dump_decl (TREE_OPERAND (t, 0), flags);
 778       pp_cxx_left_bracket (cxx_pp);
 779       dump_decl (TREE_OPERAND (t, 1), flags);
 780       pp_cxx_right_bracket (cxx_pp);
 781       break;
 782
 783       /* So that we can do dump_decl on an aggr type.  */
 784     case RECORD_TYPE:
 785     case UNION_TYPE:
 786     case ENUMERAL_TYPE:
 787       dump_type (t, flags);
 788       break;
 789
 790     case BIT_NOT_EXPR:
 791       /* This is a pseudo destructor call which has not been folded into
 792          a PSEUDO_DTOR_EXPR yet.  */
 793       pp_cxx_complement (cxx_pp);
 794       dump_type (TREE_OPERAND (t, 0), flags);
 795       break;
 796
 797     case TYPE_EXPR:
 798       gcc_unreachable ();
 799       break;
 800
 801       /* These special cases are duplicated here so that other functions
 802          can feed identifiers to error and get them demangled properly.  */
 803     case IDENTIFIER_NODE:
 804       if (IDENTIFIER_TYPENAME_P (t))
 805         {
 806           pp_cxx_identifier (cxx_pp, "operator");
 807           /* Not exactly IDENTIFIER_TYPE_VALUE.  */
 808           dump_type (TREE_TYPE (t), flags);
 809           break;
 810         }
 811       else
 812         pp_cxx_tree_identifier (cxx_pp, t);
 813       break;
 814
 815     case OVERLOAD:
 816       if (OVL_CHAIN (t))
 817         {
 818           t = OVL_CURRENT (t);
 819           if (DECL_CLASS_SCOPE_P (t))
 820             {
 821               dump_type (DECL_CONTEXT (t), flags);
 822               pp_cxx_colon_colon (cxx_pp);
 823             }
 824           else if (DECL_CONTEXT (t))
 825             {
 826               dump_decl (DECL_CONTEXT (t), flags);
 827               pp_cxx_colon_colon (cxx_pp);
 828             }
 829           dump_decl (DECL_NAME (t), flags);
 830           break;
 831         }
 832
 833       /* If there's only one function, just treat it like an ordinary
 834          FUNCTION_DECL.  */
 835       t = OVL_CURRENT (t);
 836       /* Fall through.  */
 837
 838     case FUNCTION_DECL:
 839       if (! DECL_LANG_SPECIFIC (t))
 840         pp_identifier (cxx_pp, "<built-in>");
 841       else if (DECL_GLOBAL_CTOR_P (t) || DECL_GLOBAL_DTOR_P (t))
 842         dump_global_iord (t);
 843       else
 844         dump_function_decl (t, flags);
 845       break;
 846
 847     case TEMPLATE_DECL:
 848       dump_template_decl (t, flags);
 849       break;
 850
 851     case TEMPLATE_ID_EXPR:
 852       {
 853         tree name = TREE_OPERAND (t, 0);
 854
 855         if (is_overloaded_fn (name))
 856           name = DECL_NAME (get_first_fn (name));
 857         dump_decl (name, flags);
 858         pp_cxx_begin_template_argument_list (cxx_pp);
 859         if (TREE_OPERAND (t, 1))
 860           dump_template_argument_list (TREE_OPERAND (t, 1), flags);
 861         pp_cxx_end_template_argument_list (cxx_pp);
 862       }
 863       break;
 864
 865     case LABEL_DECL:
 866       pp_cxx_tree_identifier (cxx_pp, DECL_NAME (t));
 867       break;
 868
 869     case CONST_DECL:
 870       if ((TREE_TYPE (t) != NULL_TREE && NEXT_CODE (t) == ENUMERAL_TYPE)
 871           || (DECL_INITIAL (t) &&
 872               TREE_CODE (DECL_INITIAL (t)) == TEMPLATE_PARM_INDEX))
 873         dump_simple_decl (t, TREE_TYPE (t), flags);
 874       else if (DECL_NAME (t))
 875         dump_decl (DECL_NAME (t), flags);
 876       else if (DECL_INITIAL (t))
 877         dump_expr (DECL_INITIAL (t), flags | TFF_EXPR_IN_PARENS);
 878       else
 879         pp_identifier (cxx_pp, "<enumerator>");
 880       break;
 881
 882     case USING_DECL:
 883       pp_cxx_identifier (cxx_pp, "using");
 884       dump_type (USING_DECL_SCOPE (t), flags);
 885       pp_cxx_colon_colon (cxx_pp);
 886       dump_decl (DECL_NAME (t), flags);
 887       break;
 888
 889     case STATIC_ASSERT:
 890       pp_cxx_declaration (cxx_pp, t);
 891       break;
 892
 893     case BASELINK:
 894       dump_decl (BASELINK_FUNCTIONS (t), flags);
 895       break;
 896
 897     case NON_DEPENDENT_EXPR:
 898       dump_expr (t, flags);
 899       break;
 900
 901     case TEMPLATE_TYPE_PARM:
 902       if (flags & TFF_DECL_SPECIFIERS)
 903         pp_cxx_declaration (cxx_pp, t);
 904       else
 905         pp_type_id (cxx_pp, t);
 906       break;
 907
 908     default:
 909       pp_unsupported_tree (cxx_pp, t);
 910       /* Fall through to error.  */
 911
 912     case ERROR_MARK:
 913       pp_identifier (cxx_pp, "<declaration error>");
 914       break;
 915     }
 916 }
 917
 918 /* Dump a template declaration T under control of FLAGS. This means the
 919    'template <...> leaders plus the 'class X' or 'void fn(...)' part.  */
 920
 921 static void
 922 dump_template_decl (tree t, int flags)
 923 {
 924   tree orig_parms = DECL_TEMPLATE_PARMS (t);
 925   tree parms;
 926   int i;
 927
 928   if (flags & TFF_TEMPLATE_HEADER)
 929     {
 930       for (parms = orig_parms = nreverse (orig_parms);
 931            parms;
 932            parms = TREE_CHAIN (parms))
 933         {
 934           tree inner_parms = INNERMOST_TEMPLATE_PARMS (parms);
 935           int len = TREE_VEC_LENGTH (inner_parms);
 936
 937           pp_cxx_identifier (cxx_pp, "template");
 938           pp_cxx_begin_template_argument_list (cxx_pp);
 939
 940           /* If we've shown the template prefix, we'd better show the
 941              parameters' and decl's type too.  */
 942             flags |= TFF_DECL_SPECIFIERS;
 943
 944           for (i = 0; i < len; i++)
 945             {
 946               if (i)
 947                 pp_separate_with_comma (cxx_pp);
 948               dump_template_parameter (TREE_VEC_ELT (inner_parms, i), flags);
 949             }
 950           pp_cxx_end_template_argument_list (cxx_pp);
 951           pp_cxx_whitespace (cxx_pp);
 952         }
 953       nreverse(orig_parms);
 954
 955       if (DECL_TEMPLATE_TEMPLATE_PARM_P (t))
 956         /* Say `template<arg> class TT' not just `template<arg> TT'.  */
 957         pp_cxx_identifier (cxx_pp, "class");
 958     }
 959
 960   if (TREE_CODE (DECL_TEMPLATE_RESULT (t)) == TYPE_DECL)
 961     dump_type (TREE_TYPE (t),
 962                ((flags & ~TFF_CLASS_KEY_OR_ENUM) | TFF_TEMPLATE_NAME
 963                 | (flags & TFF_DECL_SPECIFIERS ? TFF_CLASS_KEY_OR_ENUM : 0)));
 964   else if (TREE_CODE (DECL_TEMPLATE_RESULT (t)) == VAR_DECL)
 965     dump_decl (DECL_TEMPLATE_RESULT (t), flags | TFF_TEMPLATE_NAME);
 966   else
 967     {
 968       gcc_assert (TREE_TYPE (t));
 969       switch (NEXT_CODE (t))
 970         {
 971         case METHOD_TYPE:
 972         case FUNCTION_TYPE:
 973           dump_function_decl (t, flags | TFF_TEMPLATE_NAME);
 974           break;
 975         default:
 976           /* This case can occur with some invalid code.  */
 977           dump_type (TREE_TYPE (t),
 978                      (flags & ~TFF_CLASS_KEY_OR_ENUM) | TFF_TEMPLATE_NAME
 979                      | (flags & TFF_DECL_SPECIFIERS
 980                         ? TFF_CLASS_KEY_OR_ENUM : 0));
 981         }
 982     }
 983 }
 984
 985 /* Pretty print a function decl. There are several ways we want to print a
 986    function declaration. The TFF_ bits in FLAGS tells us how to behave.
 987    As error can only apply the '#' flag once to give 0 and 1 for V, there
 988    is %D which doesn't print the throw specs, and %F which does.  */
 989
 990 static void
 991 dump_function_decl (tree t, int flags)
 992 {
 993   tree fntype;
 994   tree parmtypes;
 995   tree cname = NULL_TREE;
 996   tree template_args = NULL_TREE;
 997   tree template_parms = NULL_TREE;
 998   int show_return = flags & TFF_RETURN_TYPE || flags & TFF_DECL_SPECIFIERS;
 999
1000   if (TREE_CODE (t) == TEMPLATE_DECL)
1001     t = DECL_TEMPLATE_RESULT (t);
1002
1003   /* Pretty print template instantiations only.  */
1004   if (DECL_USE_TEMPLATE (t) && DECL_TEMPLATE_INFO (t))
1005     {
1006       tree tmpl;
1007
1008       template_args = DECL_TI_ARGS (t);
1009       tmpl = most_general_template (t);
1010       if (tmpl && TREE_CODE (tmpl) == TEMPLATE_DECL)
1011         {
1012           template_parms = DECL_TEMPLATE_PARMS (tmpl);
1013           t = tmpl;
1014         }
1015     }
1016
1017   fntype = TREE_TYPE (t);
1018   parmtypes = FUNCTION_FIRST_USER_PARMTYPE (t);
1019
1020   if (DECL_CLASS_SCOPE_P (t))
1021     cname = DECL_CONTEXT (t);
1022   /* This is for partially instantiated template methods.  */
1023   else if (TREE_CODE (fntype) == METHOD_TYPE)
1024     cname = TREE_TYPE (TREE_VALUE (parmtypes));
1025
1026   if (!(flags & TFF_DECL_SPECIFIERS))
1027     /* OK */;
1028   else if (DECL_STATIC_FUNCTION_P (t))
1029     pp_cxx_identifier (cxx_pp, "static");
1030   else if (DECL_VIRTUAL_P (t))
1031     pp_cxx_identifier (cxx_pp, "virtual");
1032
1033   /* Print the return type?  */
1034   if (show_return)
1035     show_return = !DECL_CONV_FN_P (t)  && !DECL_CONSTRUCTOR_P (t)
1036                   && !DECL_DESTRUCTOR_P (t);
1037   if (show_return)
1038     dump_type_prefix (TREE_TYPE (fntype), flags);
1039
1040   /* Print the function name.  */
1041   if (cname)
1042     {
1043       dump_type (cname, flags);
1044       pp_cxx_colon_colon (cxx_pp);
1045     }
1046   else
1047     dump_scope (CP_DECL_CONTEXT (t), flags);
1048
1049   dump_function_name (t, flags);
1050
1051   if (!(flags & TFF_NO_FUNCTION_ARGUMENTS))
1052     {
1053       dump_parameters (parmtypes, flags);
1054
1055       if (TREE_CODE (fntype) == METHOD_TYPE)
1056         {
1057           pp_base (cxx_pp)->padding = pp_before;
1058           pp_cxx_cv_qualifier_seq
1059             (cxx_pp, TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype))));
1060         }
1061
1062       if (flags & TFF_EXCEPTION_SPECIFICATION)
1063         {
1064           pp_base (cxx_pp)->padding = pp_before;
1065           dump_exception_spec (TYPE_RAISES_EXCEPTIONS (fntype), flags);
1066         }
1067
1068       if (show_return)
1069         dump_type_suffix (TREE_TYPE (fntype), flags);
1070     }
1071
1072   /* If T is a template instantiation, dump the parameter binding.  */
1073   if (template_parms != NULL_TREE && template_args != NULL_TREE)
1074     {
1075       pp_cxx_whitespace (cxx_pp);
1076       pp_cxx_left_bracket (cxx_pp);
1077       pp_cxx_identifier (cxx_pp, "with");
1078       pp_cxx_whitespace (cxx_pp);
1079       dump_template_bindings (template_parms, template_args);
1080       pp_cxx_right_bracket (cxx_pp);
1081     }
1082 }
1083
1084 /* Print a parameter list. If this is for a member function, the
1085    member object ptr (and any other hidden args) should have
1086    already been removed.  */
1087
1088 static void
1089 dump_parameters (tree parmtypes, int flags)
1090 {
1091   int first;
1092
1093   pp_cxx_left_paren (cxx_pp);
1094
1095   for (first = 1; parmtypes != void_list_node;
1096        parmtypes = TREE_CHAIN (parmtypes))
1097     {
1098       if (!first)
1099         pp_separate_with_comma (cxx_pp);
1100       first = 0;
1101       if (!parmtypes)
1102         {
1103           pp_cxx_identifier (cxx_pp, "...");
1104           break;
1105         }
1106       dump_type (TREE_VALUE (parmtypes), flags);
1107
1108       if ((flags & TFF_FUNCTION_DEFAULT_ARGUMENTS) && TREE_PURPOSE (parmtypes))
1109         {
1110           pp_cxx_whitespace (cxx_pp);
1111           pp_equal (cxx_pp);
1112           pp_cxx_whitespace (cxx_pp);
1113           dump_expr (TREE_PURPOSE (parmtypes), flags | TFF_EXPR_IN_PARENS);
1114         }
1115     }
1116
1117   pp_cxx_right_paren (cxx_pp);
1118 }
1119
1120 /* Print an exception specification. T is the exception specification.  */
1121
1122 static void
1123 dump_exception_spec (tree t, int flags)
1124 {
1125   if (t)
1126     {
1127       pp_cxx_identifier (cxx_pp, "throw");
1128       pp_cxx_whitespace (cxx_pp);
1129       pp_cxx_left_paren (cxx_pp);
1130       if (TREE_VALUE (t) != NULL_TREE)
1131         while (1)
1132           {
1133             dump_type (TREE_VALUE (t), flags);
1134             t = TREE_CHAIN (t);
1135             if (!t)
1136               break;
1137             pp_separate_with_comma (cxx_pp);
1138           }
1139       pp_cxx_right_paren (cxx_pp);
1140     }
1141 }
1142
1143 /* Handle the function name for a FUNCTION_DECL node, grokking operators
1144    and destructors properly.  */
1145
1146 static void
1147 dump_function_name (tree t, int flags)
1148 {
1149   tree name = DECL_NAME (t);
1150
1151   /* We can get here with a decl that was synthesized by language-
1152      independent machinery (e.g. coverage.c) in which case it won't
1153      have a lang_specific structure attached and DECL_CONSTRUCTOR_P
1154      will crash.  In this case it is safe just to print out the
1155      literal name.  */
1156   if (!DECL_LANG_SPECIFIC (t))
1157     {
1158       pp_cxx_tree_identifier (cxx_pp, name);
1159       return;
1160     }
1161
1162   if (TREE_CODE (t) == TEMPLATE_DECL)
1163     t = DECL_TEMPLATE_RESULT (t);
1164
1165   /* Don't let the user see __comp_ctor et al.  */
1166   if (DECL_CONSTRUCTOR_P (t)
1167       || DECL_DESTRUCTOR_P (t))
1168     name = constructor_name (DECL_CONTEXT (t));
1169
1170   if (DECL_DESTRUCTOR_P (t))
1171     {
1172       pp_cxx_complement (cxx_pp);
1173       dump_decl (name, TFF_PLAIN_IDENTIFIER);
1174     }
1175   else if (DECL_CONV_FN_P (t))
1176     {
1177       /* This cannot use the hack that the operator's return
1178          type is stashed off of its name because it may be
1179          used for error reporting.  In the case of conflicting
1180          declarations, both will have the same name, yet
1181          the types will be different, hence the TREE_TYPE field
1182          of the first name will be clobbered by the second.  */
1183       pp_cxx_identifier (cxx_pp, "operator");
1184       dump_type (TREE_TYPE (TREE_TYPE (t)), flags);
1185     }
1186   else if (IDENTIFIER_OPNAME_P (name))
1187     pp_cxx_tree_identifier (cxx_pp, name);
1188   else
1189     dump_decl (name, flags);
1190
1191   if (DECL_TEMPLATE_INFO (t)
1192       && !DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (t)
1193       && (TREE_CODE (DECL_TI_TEMPLATE (t)) != TEMPLATE_DECL
1194           || PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (t))))
1195     dump_template_parms (DECL_TEMPLATE_INFO (t), !DECL_USE_TEMPLATE (t), flags);
1196 }
1197
1198 /* Dump the template parameters from the template info INFO under control of
1199    FLAGS. PRIMARY indicates whether this is a primary template decl, or
1200    specialization (partial or complete). For partial specializations we show
1201    the specialized parameter values. For a primary template we show no
1202    decoration.  */
1203
1204 static void
1205 dump_template_parms (tree info, int primary, int flags)
1206 {
1207   tree args = info ? TI_ARGS (info) : NULL_TREE;
1208
1209   if (primary && flags & TFF_TEMPLATE_NAME)
1210     return;
1211   flags &= ~(TFF_CLASS_KEY_OR_ENUM | TFF_TEMPLATE_NAME);
1212   pp_cxx_begin_template_argument_list (cxx_pp);
1213
1214   /* Be careful only to print things when we have them, so as not
1215          to crash producing error messages.  */
1216   if (args && !primary)
1217     {
1218       int len, ix;
1219
1220       if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (args))
1221         args = TREE_VEC_ELT (args, TREE_VEC_LENGTH (args) - 1);
1222
1223       len = TREE_VEC_LENGTH (args);
1224
1225       for (ix = 0; ix != len; ix++)
1226         {
1227           tree arg = TREE_VEC_ELT (args, ix);
1228
1229           if (ix)
1230             pp_separate_with_comma (cxx_pp);
1231
1232           if (!arg)
1233             pp_identifier (cxx_pp, "<template parameter error>");
1234           else
1235             dump_template_argument (arg, flags);
1236         }
1237     }
1238   else if (primary)
1239     {
1240       tree tpl = TI_TEMPLATE (info);
1241       tree parms = DECL_TEMPLATE_PARMS (tpl);
1242       int len, ix;
1243
1244       parms = TREE_CODE (parms) == TREE_LIST ? TREE_VALUE (parms) : NULL_TREE;
1245       len = parms ? TREE_VEC_LENGTH (parms) : 0;
1246
1247       for (ix = 0; ix != len; ix++)
1248         {
1249           tree parm;
1250
1251           if (TREE_VEC_ELT (parms, ix) == error_mark_node)
1252             {
1253               pp_identifier (cxx_pp, "<template parameter error>");
1254               continue;
1255             }
1256
1257           parm = TREE_VALUE (TREE_VEC_ELT (parms, ix));
1258
1259           if (ix)
1260             pp_separate_with_comma (cxx_pp);
1261
1262           dump_decl (parm, flags & ~TFF_DECL_SPECIFIERS);
1263         }
1264     }
1265   pp_cxx_end_template_argument_list (cxx_pp);
1266 }
1267
1268 /* Print out a list of initializers (subr of dump_expr).  */
1269
1270 static void
1271 dump_expr_list (tree l, int flags)
1272 {
1273   while (l)
1274     {
1275       dump_expr (TREE_VALUE (l), flags | TFF_EXPR_IN_PARENS);
1276       l = TREE_CHAIN (l);
1277       if (l)
1278         pp_separate_with_comma (cxx_pp);
1279     }
1280 }
1281
1282 /* Print out a vector of initializers (subr of dump_expr).  */
1283
1284 static void
1285 dump_expr_init_vec (VEC(constructor_elt,gc) *v, int flags)
1286 {
1287   unsigned HOST_WIDE_INT idx;
1288   tree value;
1289
1290   FOR_EACH_CONSTRUCTOR_VALUE (v, idx, value)
1291     {
1292       dump_expr (value, flags | TFF_EXPR_IN_PARENS);
1293       if (idx != VEC_length (constructor_elt, v) - 1)
1294         pp_separate_with_comma (cxx_pp);
1295     }
1296 }
1297
1298
1299 /* We've gotten an indirect REFERENCE (an OBJ_TYPE_REF) to a virtual
1300    function.  Resolve it to a close relative -- in the sense of static
1301    type -- variant being overridden.  That is close to what was written in
1302    the source code.  Subroutine of dump_expr.  */
1303
1304 static tree
1305 resolve_virtual_fun_from_obj_type_ref (tree ref)
1306 {
1307   tree obj_type = TREE_TYPE (OBJ_TYPE_REF_OBJECT (ref));
1308   int index = tree_low_cst (OBJ_TYPE_REF_TOKEN (ref), 1);
1309   tree fun = BINFO_VIRTUALS (TYPE_BINFO (TREE_TYPE (obj_type)));
1310     while (index--)
1311       fun = TREE_CHAIN (fun);
1312
1313   return BV_FN (fun);
1314 }
1315
1316 /* Print out an expression E under control of FLAGS.  */
1317
1318 static void
1319 dump_expr (tree t, int flags)
1320 {
1321   if (t == 0)
1322     return;
1323
1324   switch (TREE_CODE (t))
1325     {
1326     case VAR_DECL:
1327     case PARM_DECL:
1328     case FIELD_DECL:
1329     case CONST_DECL:
1330     case FUNCTION_DECL:
1331     case TEMPLATE_DECL:
1332     case NAMESPACE_DECL:
1333     case LABEL_DECL:
1334     case OVERLOAD:
1335     case IDENTIFIER_NODE:
1336       dump_decl (t, (flags & ~TFF_DECL_SPECIFIERS) | TFF_NO_FUNCTION_ARGUMENTS);
1337       break;
1338
1339     case INTEGER_CST:
1340     case REAL_CST:
1341     case STRING_CST:
1342       pp_constant (cxx_pp, t);
1343       break;
1344
1345     case THROW_EXPR:
1346       pp_cxx_identifier (cxx_pp, "throw");
1347       dump_expr (TREE_OPERAND (t, 0), flags);
1348       break;
1349
1350     case PTRMEM_CST:
1351       pp_ampersand (cxx_pp);
1352       dump_type (PTRMEM_CST_CLASS (t), flags);
1353       pp_cxx_colon_colon (cxx_pp);
1354       pp_cxx_tree_identifier (cxx_pp, DECL_NAME (PTRMEM_CST_MEMBER (t)));
1355       break;
1356
1357     case COMPOUND_EXPR:
1358       pp_cxx_left_paren (cxx_pp);
1359       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1360       pp_separate_with_comma (cxx_pp);
1361       dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1362       pp_cxx_right_paren (cxx_pp);
1363       break;
1364
1365     case COND_EXPR:
1366       pp_cxx_left_paren (cxx_pp);
1367       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1368       pp_string (cxx_pp, " ? ");
1369       dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1370       pp_string (cxx_pp, " : ");
1371       dump_expr (TREE_OPERAND (t, 2), flags | TFF_EXPR_IN_PARENS);
1372       pp_cxx_right_paren (cxx_pp);
1373       break;
1374
1375     case SAVE_EXPR:
1376       if (TREE_HAS_CONSTRUCTOR (t))
1377         {
1378           pp_cxx_identifier (cxx_pp, "new");
1379           pp_cxx_whitespace (cxx_pp);
1380           dump_type (TREE_TYPE (TREE_TYPE (t)), flags);
1381         }
1382       else
1383         dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1384       break;
1385
1386     case AGGR_INIT_EXPR:
1387       {
1388         tree fn = NULL_TREE;
1389
1390         if (TREE_CODE (TREE_OPERAND (t, 0)) == ADDR_EXPR)
1391           fn = TREE_OPERAND (TREE_OPERAND (t, 0), 0);
1392
1393         if (fn && TREE_CODE (fn) == FUNCTION_DECL)
1394           {
1395             if (DECL_CONSTRUCTOR_P (fn))
1396               dump_type (DECL_CONTEXT (fn), flags);
1397             else
1398               dump_decl (fn, 0);
1399           }
1400         else
1401           dump_expr (TREE_OPERAND (t, 0), 0);
1402       }
1403       pp_cxx_left_paren (cxx_pp);
1404       if (TREE_OPERAND (t, 1))
1405         dump_expr_list (TREE_CHAIN (TREE_OPERAND (t, 1)), flags);
1406       pp_cxx_right_paren (cxx_pp);
1407       break;
1408
1409     case CALL_EXPR:
1410       {
1411         tree fn = TREE_OPERAND (t, 0);
1412         tree args = TREE_OPERAND (t, 1);
1413
1414         if (TREE_CODE (fn) == ADDR_EXPR)
1415           fn = TREE_OPERAND (fn, 0);
1416
1417         /* Nobody is interested in seeing the guts of vcalls.  */
1418         if (TREE_CODE (fn) == OBJ_TYPE_REF)
1419           fn = resolve_virtual_fun_from_obj_type_ref (fn);
1420
1421         if (TREE_TYPE (fn) != NULL_TREE && NEXT_CODE (fn) == METHOD_TYPE)
1422           {
1423             tree ob = TREE_VALUE (args);
1424             if (TREE_CODE (ob) == ADDR_EXPR)
1425               {
1426                 dump_expr (TREE_OPERAND (ob, 0), flags | TFF_EXPR_IN_PARENS);
1427                 pp_dot (cxx_pp);
1428               }
1429             else if (TREE_CODE (ob) != PARM_DECL
1430                      || strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this"))
1431               {
1432                 dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1433                 pp_arrow (cxx_pp);
1434               }
1435             args = TREE_CHAIN (args);
1436           }
1437         dump_expr (fn, flags | TFF_EXPR_IN_PARENS);
1438         pp_cxx_left_paren (cxx_pp);
1439         dump_expr_list (args, flags);
1440         pp_cxx_right_paren (cxx_pp);
1441       }
1442       break;
1443
1444     case NEW_EXPR:
1445       {
1446         tree type = TREE_OPERAND (t, 1);
1447         tree init = TREE_OPERAND (t, 2);
1448         if (NEW_EXPR_USE_GLOBAL (t))
1449           pp_cxx_colon_colon (cxx_pp);
1450         pp_cxx_identifier (cxx_pp, "new");
1451         if (TREE_OPERAND (t, 0))
1452           {
1453             pp_cxx_left_paren (cxx_pp);
1454             dump_expr_list (TREE_OPERAND (t, 0), flags);
1455             pp_cxx_right_paren (cxx_pp);
1456             pp_cxx_whitespace (cxx_pp);
1457           }
1458         if (TREE_CODE (type) == ARRAY_REF)
1459           type = build_cplus_array_type
1460             (TREE_OPERAND (type, 0),
1461              build_index_type (fold_build2 (MINUS_EXPR, integer_type_node,
1462                                             TREE_OPERAND (type, 1),
1463                                             integer_one_node)));
1464         dump_type (type, flags);
1465         if (init)
1466           {
1467             pp_cxx_left_paren (cxx_pp);
1468             if (TREE_CODE (init) == TREE_LIST)
1469               dump_expr_list (init, flags);
1470             else if (init == void_zero_node)
1471               /* This representation indicates an empty initializer,
1472                  e.g.: "new int()".  */
1473               ;
1474             else
1475               dump_expr (init, flags);
1476             pp_cxx_right_paren (cxx_pp);
1477           }
1478       }
1479       break;
1480
1481     case TARGET_EXPR:
1482       /* Note that this only works for G++ target exprs.  If somebody
1483          builds a general TARGET_EXPR, there's no way to represent that
1484          it initializes anything other that the parameter slot for the
1485          default argument.  Note we may have cleared out the first
1486          operand in expand_expr, so don't go killing ourselves.  */
1487       if (TREE_OPERAND (t, 1))
1488         dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1489       break;
1490
1491     case INIT_EXPR:
1492     case MODIFY_EXPR:
1493     case PLUS_EXPR:
1494     case MINUS_EXPR:
1495     case MULT_EXPR:
1496     case TRUNC_DIV_EXPR:
1497     case TRUNC_MOD_EXPR:
1498     case MIN_EXPR:
1499     case MAX_EXPR:
1500     case LSHIFT_EXPR:
1501     case RSHIFT_EXPR:
1502     case BIT_IOR_EXPR:
1503     case BIT_XOR_EXPR:
1504     case BIT_AND_EXPR:
1505     case TRUTH_ANDIF_EXPR:
1506     case TRUTH_ORIF_EXPR:
1507     case LT_EXPR:
1508     case LE_EXPR:
1509     case GT_EXPR:
1510     case GE_EXPR:
1511     case EQ_EXPR:
1512     case NE_EXPR:
1513     case EXACT_DIV_EXPR:
1514       dump_binary_op (operator_name_info[(int) TREE_CODE (t)].name, t, flags);
1515       break;
1516
1517     case CEIL_DIV_EXPR:
1518     case FLOOR_DIV_EXPR:
1519     case ROUND_DIV_EXPR:
1520     case RDIV_EXPR:
1521       dump_binary_op ("/", t, flags);
1522       break;
1523
1524     case CEIL_MOD_EXPR:
1525     case FLOOR_MOD_EXPR:
1526     case ROUND_MOD_EXPR:
1527       dump_binary_op ("%", t, flags);
1528       break;
1529
1530     case COMPONENT_REF:
1531       {
1532         tree ob = TREE_OPERAND (t, 0);
1533         if (TREE_CODE (ob) == INDIRECT_REF)
1534           {
1535             ob = TREE_OPERAND (ob, 0);
1536             if (TREE_CODE (ob) != PARM_DECL
1537                 || (DECL_NAME (ob)
1538                     && strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this")))
1539               {
1540                 dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1541                 pp_cxx_arrow (cxx_pp);
1542               }
1543           }
1544         else
1545           {
1546             dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1547             pp_cxx_dot (cxx_pp);
1548           }
1549         dump_expr (TREE_OPERAND (t, 1), flags & ~TFF_EXPR_IN_PARENS);
1550       }
1551       break;
1552
1553     case ARRAY_REF:
1554       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1555       pp_cxx_left_bracket (cxx_pp);
1556       dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1557       pp_cxx_right_bracket (cxx_pp);
1558       break;
1559
1560     case UNARY_PLUS_EXPR:
1561       dump_unary_op ("+", t, flags);
1562       break;
1563
1564     case ADDR_EXPR:
1565       if (TREE_CODE (TREE_OPERAND (t, 0)) == FUNCTION_DECL
1566           || TREE_CODE (TREE_OPERAND (t, 0)) == STRING_CST
1567           /* An ADDR_EXPR can have reference type.  In that case, we
1568              shouldn't print the `&' doing so indicates to the user
1569              that the expression has pointer type.  */
1570           || (TREE_TYPE (t)
1571               && TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE))
1572         dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1573       else if (TREE_CODE (TREE_OPERAND (t, 0)) == LABEL_DECL)
1574         dump_unary_op ("&&", t, flags);
1575       else
1576         dump_unary_op ("&", t, flags);
1577       break;
1578
1579     case INDIRECT_REF:
1580       if (TREE_HAS_CONSTRUCTOR (t))
1581         {
1582           t = TREE_OPERAND (t, 0);
1583           gcc_assert (TREE_CODE (t) == CALL_EXPR);
1584           dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1585           pp_cxx_left_paren (cxx_pp);
1586           dump_expr_list (TREE_CHAIN (TREE_OPERAND (t, 1)), flags);
1587           pp_cxx_right_paren (cxx_pp);
1588         }
1589       else
1590         {
1591           if (TREE_OPERAND (t,0) != NULL_TREE
1592               && TREE_TYPE (TREE_OPERAND (t, 0))
1593               && NEXT_CODE (TREE_OPERAND (t, 0)) == REFERENCE_TYPE)
1594             dump_expr (TREE_OPERAND (t, 0), flags);
1595           else
1596             dump_unary_op ("*", t, flags);
1597         }
1598       break;
1599
1600     case NEGATE_EXPR:
1601     case BIT_NOT_EXPR:
1602     case TRUTH_NOT_EXPR:
1603     case PREDECREMENT_EXPR:
1604     case PREINCREMENT_EXPR:
1605       dump_unary_op (operator_name_info [(int)TREE_CODE (t)].name, t, flags);
1606       break;
1607
1608     case POSTDECREMENT_EXPR:
1609     case POSTINCREMENT_EXPR:
1610       pp_cxx_left_paren (cxx_pp);
1611       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1612       pp_cxx_identifier (cxx_pp, operator_name_info[(int)TREE_CODE (t)].name);
1613       pp_cxx_right_paren (cxx_pp);
1614       break;
1615
1616     case NON_LVALUE_EXPR:
1617       /* FIXME: This is a KLUDGE workaround for a parsing problem.  There
1618          should be another level of INDIRECT_REF so that I don't have to do
1619          this.  */
1620       if (TREE_TYPE (t) != NULL_TREE && NEXT_CODE (t) == POINTER_TYPE)
1621         {
1622           tree next = TREE_TYPE (TREE_TYPE (t));
1623
1624           while (TREE_CODE (next) == POINTER_TYPE)
1625             next = TREE_TYPE (next);
1626
1627           if (TREE_CODE (next) == FUNCTION_TYPE)
1628             {
1629               if (flags & TFF_EXPR_IN_PARENS)
1630                 pp_cxx_left_paren (cxx_pp);
1631               pp_cxx_star (cxx_pp);
1632               dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1633               if (flags & TFF_EXPR_IN_PARENS)
1634                 pp_cxx_right_paren (cxx_pp);
1635               break;
1636             }
1637           /* Else fall through.  */
1638         }
1639       dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1640       break;
1641
1642     case NOP_EXPR:
1643     case CONVERT_EXPR:
1644       {
1645         tree op = TREE_OPERAND (t, 0);
1646
1647         if (!same_type_p (TREE_TYPE (op), TREE_TYPE (t)))
1648           {
1649             /* It is a cast, but we cannot tell whether it is a
1650                reinterpret or static cast. Use the C style notation.  */
1651             if (flags & TFF_EXPR_IN_PARENS)
1652               pp_cxx_left_paren (cxx_pp);
1653             pp_cxx_left_paren (cxx_pp);
1654             dump_type (TREE_TYPE (t), flags);
1655             pp_cxx_right_paren (cxx_pp);
1656             dump_expr (op, flags | TFF_EXPR_IN_PARENS);
1657             if (flags & TFF_EXPR_IN_PARENS)
1658               pp_cxx_right_paren (cxx_pp);
1659           }
1660         else
1661           dump_expr (op, flags);
1662         break;
1663       }
1664
1665     case CONSTRUCTOR:
1666       if (TREE_TYPE (t) && TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
1667         {
1668           tree idx = build_ptrmemfunc_access_expr (t, pfn_identifier);
1669
1670           if (integer_zerop (idx))
1671             {
1672               /* A NULL pointer-to-member constant.  */
1673               pp_cxx_left_paren (cxx_pp);
1674               pp_cxx_left_paren (cxx_pp);
1675               dump_type (TREE_TYPE (t), flags);
1676               pp_cxx_right_paren (cxx_pp);
1677               pp_character (cxx_pp, '0');
1678               pp_cxx_right_paren (cxx_pp);
1679               break;
1680             }
1681           else if (host_integerp (idx, 0))
1682             {
1683               tree virtuals;
1684               unsigned HOST_WIDE_INT n;
1685
1686               t = TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (TREE_TYPE (t)));
1687               t = TYPE_METHOD_BASETYPE (t);
1688               virtuals = BINFO_VIRTUALS (TYPE_BINFO (TYPE_MAIN_VARIANT (t)));
1689
1690               n = tree_low_cst (idx, 0);
1691
1692               /* Map vtable index back one, to allow for the null pointer to
1693                  member.  */
1694               --n;
1695
1696               while (n > 0 && virtuals)
1697                 {
1698                   --n;
1699                   virtuals = TREE_CHAIN (virtuals);
1700                 }
1701               if (virtuals)
1702                 {
1703                   dump_expr (BV_FN (virtuals),
1704                              flags | TFF_EXPR_IN_PARENS);
1705                   break;
1706                 }
1707             }
1708         }
1709       if (TREE_TYPE (t) && EMPTY_CONSTRUCTOR_P (t))
1710         {
1711           dump_type (TREE_TYPE (t), 0);
1712           pp_cxx_left_paren (cxx_pp);
1713           pp_cxx_right_paren (cxx_pp);
1714         }
1715       else
1716         {
1717           pp_cxx_left_brace (cxx_pp);
1718           dump_expr_init_vec (CONSTRUCTOR_ELTS (t), flags);
1719           pp_cxx_right_brace (cxx_pp);
1720         }
1721
1722       break;
1723
1724     case OFFSET_REF:
1725       {
1726         tree ob = TREE_OPERAND (t, 0);
1727         if (is_dummy_object (ob))
1728           {
1729             t = TREE_OPERAND (t, 1);
1730             if (TREE_CODE (t) == FUNCTION_DECL)
1731               /* A::f */
1732               dump_expr (t, flags | TFF_EXPR_IN_PARENS);
1733             else if (BASELINK_P (t))
1734               dump_expr (OVL_CURRENT (BASELINK_FUNCTIONS (t)),
1735                          flags | TFF_EXPR_IN_PARENS);
1736             else
1737               dump_decl (t, flags);
1738           }
1739         else
1740           {
1741             if (TREE_CODE (ob) == INDIRECT_REF)
1742               {
1743                 dump_expr (TREE_OPERAND (ob, 0), flags | TFF_EXPR_IN_PARENS);
1744                 pp_cxx_arrow (cxx_pp);
1745                 pp_cxx_star (cxx_pp);
1746               }
1747             else
1748               {
1749                 dump_expr (ob, flags | TFF_EXPR_IN_PARENS);
1750                 pp_cxx_dot (cxx_pp);
1751                 pp_cxx_star (cxx_pp);
1752               }
1753             dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1754           }
1755         break;
1756       }
1757
1758     case TEMPLATE_PARM_INDEX:
1759       dump_decl (TEMPLATE_PARM_DECL (t), flags & ~TFF_DECL_SPECIFIERS);
1760       break;
1761
1762     case SCOPE_REF:
1763       pp_expression (cxx_pp, t);
1764       break;
1765
1766     case CAST_EXPR:
1767       if (TREE_OPERAND (t, 0) == NULL_TREE
1768           || TREE_CHAIN (TREE_OPERAND (t, 0)))
1769         {
1770           dump_type (TREE_TYPE (t), flags);
1771           pp_cxx_left_paren (cxx_pp);
1772           dump_expr_list (TREE_OPERAND (t, 0), flags);
1773           pp_cxx_right_paren (cxx_pp);
1774         }
1775       else
1776         {
1777           pp_cxx_left_paren (cxx_pp);
1778           dump_type (TREE_TYPE (t), flags);
1779           pp_cxx_right_paren (cxx_pp);
1780           pp_cxx_left_paren (cxx_pp);
1781           dump_expr_list (TREE_OPERAND (t, 0), flags);
1782           pp_cxx_right_paren (cxx_pp);
1783         }
1784       break;
1785
1786     case STATIC_CAST_EXPR:
1787       pp_cxx_identifier (cxx_pp, "static_cast");
1788       goto cast;
1789     case REINTERPRET_CAST_EXPR:
1790       pp_cxx_identifier (cxx_pp, "reinterpret_cast");
1791       goto cast;
1792     case CONST_CAST_EXPR:
1793       pp_cxx_identifier (cxx_pp, "const_cast");
1794       goto cast;
1795     case DYNAMIC_CAST_EXPR:
1796       pp_cxx_identifier (cxx_pp, "dynamic_cast");
1797     cast:
1798       pp_cxx_begin_template_argument_list (cxx_pp);
1799       dump_type (TREE_TYPE (t), flags);
1800       pp_cxx_end_template_argument_list (cxx_pp);
1801       pp_cxx_left_paren (cxx_pp);
1802       dump_expr (TREE_OPERAND (t, 0), flags);
1803       pp_cxx_right_paren (cxx_pp);
1804       break;
1805
1806     case ARROW_EXPR:
1807       dump_expr (TREE_OPERAND (t, 0), flags);
1808       pp_cxx_arrow (cxx_pp);
1809       break;
1810
1811     case SIZEOF_EXPR:
1812     case ALIGNOF_EXPR:
1813       if (TREE_CODE (t) == SIZEOF_EXPR)
1814         pp_cxx_identifier (cxx_pp, "sizeof");
1815       else
1816         {
1817           gcc_assert (TREE_CODE (t) == ALIGNOF_EXPR);
1818           pp_cxx_identifier (cxx_pp, "__alignof__");
1819         }
1820       pp_cxx_whitespace (cxx_pp);
1821       pp_cxx_left_paren (cxx_pp);
1822       if (TYPE_P (TREE_OPERAND (t, 0)))
1823         dump_type (TREE_OPERAND (t, 0), flags);
1824       else
1825         dump_expr (TREE_OPERAND (t, 0), flags);
1826       pp_cxx_right_paren (cxx_pp);
1827       break;
1828
1829     case REALPART_EXPR:
1830     case IMAGPART_EXPR:
1831       pp_cxx_identifier (cxx_pp, operator_name_info[TREE_CODE (t)].name);
1832       pp_cxx_whitespace (cxx_pp);
1833       dump_expr (TREE_OPERAND (t, 0), flags);
1834       break;
1835
1836     case DEFAULT_ARG:
1837       pp_identifier (cxx_pp, "<unparsed>");
1838       break;
1839
1840     case TRY_CATCH_EXPR:
1841     case WITH_CLEANUP_EXPR:
1842     case CLEANUP_POINT_EXPR:
1843       dump_expr (TREE_OPERAND (t, 0), flags);
1844       break;
1845
1846     case PSEUDO_DTOR_EXPR:
1847       dump_expr (TREE_OPERAND (t, 2), flags);
1848       pp_cxx_dot (cxx_pp);
1849       dump_type (TREE_OPERAND (t, 0), flags);
1850       pp_cxx_colon_colon (cxx_pp);
1851       pp_cxx_complement (cxx_pp);
1852       dump_type (TREE_OPERAND (t, 1), flags);
1853       break;
1854
1855     case TEMPLATE_ID_EXPR:
1856       dump_decl (t, flags);
1857       break;
1858
1859     case BIND_EXPR:
1860     case STMT_EXPR:
1861     case STATEMENT_LIST:
1862       /* We don't yet have a way of dumping statements in a
1863          human-readable format.  */
1864       pp_string (cxx_pp, "({...})");
1865       break;
1866
1867     case LOOP_EXPR:
1868       pp_string (cxx_pp, "while (1) { ");
1869       dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1870       pp_cxx_right_brace (cxx_pp);
1871       break;
1872
1873     case EXIT_EXPR:
1874       pp_string (cxx_pp, "if (");
1875       dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1876       pp_string (cxx_pp, ") break; ");
1877       break;
1878
1879     case BASELINK:
1880       dump_expr (get_first_fn (t), flags & ~TFF_EXPR_IN_PARENS);
1881       break;
1882
1883     case EMPTY_CLASS_EXPR:
1884       dump_type (TREE_TYPE (t), flags);
1885       pp_cxx_left_paren (cxx_pp);
1886       pp_cxx_right_paren (cxx_pp);
1887       break;
1888
1889     case NON_DEPENDENT_EXPR:
1890       dump_expr (TREE_OPERAND (t, 0), flags);
1891       break;
1892
1893       /*  This list is incomplete, but should suffice for now.
1894           It is very important that `sorry' does not call
1895           `report_error_function'.  That could cause an infinite loop.  */
1896     default:
1897       pp_unsupported_tree (cxx_pp, t);
1898       /* fall through to ERROR_MARK...  */
1899     case ERROR_MARK:
1900       pp_identifier (cxx_pp, "<expression error>");
1901       break;
1902     }
1903 }
1904
1905 static void
1906 dump_binary_op (const char *opstring, tree t, int flags)
1907 {
1908   pp_cxx_left_paren (cxx_pp);
1909   dump_expr (TREE_OPERAND (t, 0), flags | TFF_EXPR_IN_PARENS);
1910   pp_cxx_whitespace (cxx_pp);
1911   if (opstring)
1912     pp_cxx_identifier (cxx_pp, opstring);
1913   else
1914     pp_identifier (cxx_pp, "<unknown operator>");
1915   pp_cxx_whitespace (cxx_pp);
1916   dump_expr (TREE_OPERAND (t, 1), flags | TFF_EXPR_IN_PARENS);
1917   pp_cxx_right_paren (cxx_pp);
1918 }
1919
1920 static void
1921 dump_unary_op (const char *opstring, tree t, int flags)
1922 {
1923   if (flags & TFF_EXPR_IN_PARENS)
1924     pp_cxx_left_paren (cxx_pp);
1925   pp_cxx_identifier (cxx_pp, opstring);
1926   dump_expr (TREE_OPERAND (t, 0), flags & ~TFF_EXPR_IN_PARENS);
1927   if (flags & TFF_EXPR_IN_PARENS)
1928     pp_cxx_right_paren (cxx_pp);
1929 }
1930
1931 static void
1932 reinit_cxx_pp (void)
1933 {
1934   pp_clear_output_area (cxx_pp);
1935   pp_base (cxx_pp)->padding = pp_none;
1936   pp_indentation (cxx_pp) = 0;
1937   pp_needs_newline (cxx_pp) = false;
1938   cxx_pp->enclosing_scope = 0;
1939 }
1940
1941
1942 /* Exported interface to stringifying types, exprs and decls under TFF_*
1943    control.  */
1944
1945 const char *
1946 type_as_string (tree typ, int flags)
1947 {
1948   reinit_cxx_pp ();
1949   dump_type (typ, flags);
1950   return pp_formatted_text (cxx_pp);
1951 }
1952
1953 const char *
1954 expr_as_string (tree decl, int flags)
1955 {
1956   reinit_cxx_pp ();
1957   dump_expr (decl, flags);
1958   return pp_formatted_text (cxx_pp);
1959 }
1960
1961 const char *
1962 decl_as_string (tree decl, int flags)
1963 {
1964   reinit_cxx_pp ();
1965   dump_decl (decl, flags);
1966   return pp_formatted_text (cxx_pp);
1967 }
1968
1969 /* Generate the three forms of printable names for cxx_printable_name.  */
1970
1971 const char *
1972 lang_decl_name (tree decl, int v)
1973 {
1974   if (v >= 2)
1975     return decl_as_string (decl, TFF_DECL_SPECIFIERS);
1976
1977   reinit_cxx_pp ();
1978   if (v == 1 && DECL_CLASS_SCOPE_P (decl))
1979     {
1980       dump_type (CP_DECL_CONTEXT (decl), TFF_PLAIN_IDENTIFIER);
1981       pp_cxx_colon_colon (cxx_pp);
1982     }
1983
1984   if (TREE_CODE (decl) == FUNCTION_DECL)
1985     dump_function_name (decl, TFF_PLAIN_IDENTIFIER);
1986   else
1987     dump_decl (DECL_NAME (decl), TFF_PLAIN_IDENTIFIER);
1988
1989   return pp_formatted_text (cxx_pp);
1990 }
1991
1992 /* Return the location of a tree passed to %+ formats.  */
1993
1994 static location_t
1995 location_of (tree t)
1996 {
1997   if (TREE_CODE (t) == PARM_DECL && DECL_CONTEXT (t))
1998     t = DECL_CONTEXT (t);
1999   else if (TYPE_P (t))
2000     t = TYPE_MAIN_DECL (t);
2001   else if (TREE_CODE (t) == OVERLOAD)
2002     t = OVL_FUNCTION (t);
2003
2004   return DECL_SOURCE_LOCATION (t);
2005 }
2006
2007 /* Now the interfaces from error et al to dump_type et al. Each takes an
2008    on/off VERBOSE flag and supply the appropriate TFF_ flags to a dump_
2009    function.  */
2010
2011 static const char *
2012 decl_to_string (tree decl, int verbose)
2013 {
2014   int flags = 0;
2015
2016   if (TREE_CODE (decl) == TYPE_DECL || TREE_CODE (decl) == RECORD_TYPE
2017       || TREE_CODE (decl) == UNION_TYPE || TREE_CODE (decl) == ENUMERAL_TYPE)
2018     flags = TFF_CLASS_KEY_OR_ENUM;
2019   if (verbose)
2020     flags |= TFF_DECL_SPECIFIERS;
2021   else if (TREE_CODE (decl) == FUNCTION_DECL)
2022     flags |= TFF_DECL_SPECIFIERS | TFF_RETURN_TYPE;
2023   flags |= TFF_TEMPLATE_HEADER;
2024
2025   reinit_cxx_pp ();
2026   dump_decl (decl, flags);
2027   return pp_formatted_text (cxx_pp);
2028 }
2029
2030 static const char *
2031 expr_to_string (tree decl)
2032 {
2033   reinit_cxx_pp ();
2034   dump_expr (decl, 0);
2035   return pp_formatted_text (cxx_pp);
2036 }
2037
2038 static const char *
2039 fndecl_to_string (tree fndecl, int verbose)
2040 {
2041   int flags;
2042
2043   flags = TFF_EXCEPTION_SPECIFICATION | TFF_DECL_SPECIFIERS
2044     | TFF_TEMPLATE_HEADER;
2045   if (verbose)
2046     flags |= TFF_FUNCTION_DEFAULT_ARGUMENTS;
2047   reinit_cxx_pp ();
2048   dump_decl (fndecl, flags);
2049   return pp_formatted_text (cxx_pp);
2050 }
2051
2052
2053 static const char *
2054 code_to_string (enum tree_code c)
2055 {
2056   return tree_code_name [c];
2057 }
2058
2059 const char *
2060 language_to_string (enum languages c)
2061 {
2062   switch (c)
2063     {
2064     case lang_c:
2065       return "C";
2066
2067     case lang_cplusplus:
2068       return "C++";
2069
2070     case lang_java:
2071       return "Java";
2072
2073     default:
2074       gcc_unreachable ();
2075     }
2076   return NULL;
2077 }
2078
2079 /* Return the proper printed version of a parameter to a C++ function.  */
2080
2081 static const char *
2082 parm_to_string (int p)
2083 {
2084   reinit_cxx_pp ();
2085   if (p < 0)
2086     pp_string (cxx_pp, "'this'");
2087   else
2088     pp_decimal_int (cxx_pp, p + 1);
2089   return pp_formatted_text (cxx_pp);
2090 }
2091
2092 static const char *
2093 op_to_string (enum tree_code p)
2094 {
2095   tree id = operator_name_info[(int) p].identifier;
2096   return id ? IDENTIFIER_POINTER (id) : "<unknown>";
2097 }
2098
2099 static const char *
2100 type_to_string (tree typ, int verbose)
2101 {
2102   int flags = 0;
2103   if (verbose)
2104     flags |= TFF_CLASS_KEY_OR_ENUM;
2105   flags |= TFF_TEMPLATE_HEADER;
2106
2107   reinit_cxx_pp ();
2108   dump_type (typ, flags);
2109   return pp_formatted_text (cxx_pp);
2110 }
2111
2112 static const char *
2113 assop_to_string (enum tree_code p)
2114 {
2115   tree id = assignment_operator_name_info[(int) p].identifier;
2116   return id ? IDENTIFIER_POINTER (id) : "{unknown}";
2117 }
2118
2119 static const char *
2120 args_to_string (tree p, int verbose)
2121 {
2122   int flags = 0;
2123   if (verbose)
2124     flags |= TFF_CLASS_KEY_OR_ENUM;
2125
2126   if (p == NULL_TREE)
2127     return "";
2128
2129   if (TYPE_P (TREE_VALUE (p)))
2130     return type_as_string (p, flags);
2131
2132   reinit_cxx_pp ();
2133   for (; p; p = TREE_CHAIN (p))
2134     {
2135       if (TREE_VALUE (p) == null_node)
2136         pp_cxx_identifier (cxx_pp, "NULL");
2137       else
2138         dump_type (error_type (TREE_VALUE (p)), flags);
2139       if (TREE_CHAIN (p))
2140         pp_separate_with_comma (cxx_pp);
2141     }
2142   return pp_formatted_text (cxx_pp);
2143 }
2144
2145 static const char *
2146 cv_to_string (tree p, int v)
2147 {
2148   reinit_cxx_pp ();
2149   pp_base (cxx_pp)->padding = v ? pp_before : pp_none;
2150   pp_cxx_cv_qualifier_seq (cxx_pp, p);
2151   return pp_formatted_text (cxx_pp);
2152 }
2153
2154 /* Langhook for print_error_function.  */
2155 void
2156 cxx_print_error_function (diagnostic_context *context, const char *file)
2157 {
2158   lhd_print_error_function (context, file);
2159   pp_base_set_prefix (context->printer, file);
2160   maybe_print_instantiation_context (context);
2161 }
2162
2163 static void
2164 cp_diagnostic_starter (diagnostic_context *context,
2165                        diagnostic_info *diagnostic)
2166 {
2167   diagnostic_report_current_module (context);
2168   cp_print_error_function (context, diagnostic);
2169   maybe_print_instantiation_context (context);
2170   pp_base_set_prefix (context->printer, diagnostic_build_prefix (diagnostic));
2171 }
2172
2173 static void
2174 cp_diagnostic_finalizer (diagnostic_context *context,
2175                          diagnostic_info *diagnostic ATTRIBUTE_UNUSED)
2176 {
2177   pp_base_destroy_prefix (context->printer);
2178 }
2179
2180 /* Print current function onto BUFFER, in the process of reporting
2181    a diagnostic message.  Called from cp_diagnostic_starter.  */
2182 static void
2183 cp_print_error_function (diagnostic_context *context,
2184                          diagnostic_info *diagnostic)
2185 {
2186   if (diagnostic_last_function_changed (context))
2187     {
2188       const char *old_prefix = context->printer->prefix;
2189       const char *file = LOCATION_FILE (diagnostic->location);
2190       char *new_prefix = file ? file_name_as_prefix (file) : NULL;
2191
2192       pp_base_set_prefix (context->printer, new_prefix);
2193
2194       if (current_function_decl == NULL)
2195         pp_base_string (context->printer, "At global scope:");
2196       else
2197         pp_printf (context->printer, "In %s %qs:",
2198                    function_category (current_function_decl),
2199                    cxx_printable_name (current_function_decl, 2));
2200       pp_base_newline (context->printer);
2201
2202       diagnostic_set_last_function (context);
2203       pp_base_destroy_prefix (context->printer);
2204       context->printer->prefix = old_prefix;
2205     }
2206 }
2207
2208 /* Returns a description of FUNCTION using standard terminology.  */
2209 static const char *
2210 function_category (tree fn)
2211 {
2212   if (DECL_FUNCTION_MEMBER_P (fn))
2213     {
2214       if (DECL_STATIC_FUNCTION_P (fn))
2215         return "static member function";
2216       else if (DECL_COPY_CONSTRUCTOR_P (fn))
2217         return "copy constructor";
2218       else if (DECL_CONSTRUCTOR_P (fn))
2219         return "constructor";
2220       else if (DECL_DESTRUCTOR_P (fn))
2221         return "destructor";
2222       else
2223         return "member function";
2224     }
2225   else
2226     return "function";
2227 }
2228
2229 /* Report the full context of a current template instantiation,
2230    onto BUFFER.  */
2231 static void
2232 print_instantiation_full_context (diagnostic_context *context)
2233 {
2234   tree p = current_instantiation ();
2235   location_t location = input_location;
2236
2237   if (p)
2238     {
2239       if (current_function_decl != TINST_DECL (p)
2240           && current_function_decl != NULL_TREE)
2241         /* We can get here during the processing of some synthesized
2242            method.  Then, TINST_DECL (p) will be the function that's causing
2243            the synthesis.  */
2244         ;
2245       else
2246         {
2247           if (current_function_decl == TINST_DECL (p))
2248             /* Avoid redundancy with the "In function" line.  */;
2249           else
2250             pp_verbatim (context->printer,
2251                          "%s: In instantiation of %qs:\n",
2252                          LOCATION_FILE (location),
2253                          decl_as_string (TINST_DECL (p),
2254                                          TFF_DECL_SPECIFIERS | TFF_RETURN_TYPE));
2255
2256           location = TINST_LOCATION (p);
2257           p = TREE_CHAIN (p);
2258         }
2259     }
2260
2261   print_instantiation_partial_context (context, p, location);
2262 }
2263
2264 /* Same as above but less verbose.  */
2265 static void
2266 print_instantiation_partial_context (diagnostic_context *context,
2267                                      tree t, location_t loc)
2268 {
2269   expanded_location xloc;
2270   for (; ; t = TREE_CHAIN (t))
2271     {
2272       xloc = expand_location (loc);
2273       if (t == NULL_TREE)
2274         break;
2275       pp_verbatim (context->printer, "%s:%d:   instantiated from %qs\n",
2276                    xloc.file, xloc.line,
2277                    decl_as_string (TINST_DECL (t),
2278                                    TFF_DECL_SPECIFIERS | TFF_RETURN_TYPE));
2279       loc = TINST_LOCATION (t);
2280     }
2281   pp_verbatim (context->printer, "%s:%d:   instantiated from here",
2282                xloc.file, xloc.line);
2283   pp_base_newline (context->printer);
2284 }
2285
2286 /* Called from cp_thing to print the template context for an error.  */
2287 static void
2288 maybe_print_instantiation_context (diagnostic_context *context)
2289 {
2290   if (!problematic_instantiation_changed () || current_instantiation () == 0)
2291     return;
2292
2293   record_last_problematic_instantiation ();
2294   print_instantiation_full_context (context);
2295 }
2296
2297 /* Report the bare minimum context of a template instantiation.  */
2298 void
2299 print_instantiation_context (void)
2300 {
2301   print_instantiation_partial_context
2302     (global_dc, current_instantiation (), input_location);
2303   diagnostic_flush_buffer (global_dc);
2304 }
2305 \f
2306 /* Called from output_format -- during diagnostic message processing --
2307    to handle C++ specific format specifier with the following meanings:
2308    %A   function argument-list.
2309    %C   tree code.
2310    %D   declaration.
2311    %E   expression.
2312    %F   function declaration.
2313    %L   language as used in extern "lang".
2314    %O   binary operator.
2315    %P   function parameter whose position is indicated by an integer.
2316    %Q   assignment operator.
2317    %T   type.
2318    %V   cv-qualifier.  */
2319 static bool
2320 cp_printer (pretty_printer *pp, text_info *text, const char *spec,
2321             int precision, bool wide, bool set_locus, bool verbose)
2322 {
2323   const char *result;
2324   tree t = NULL;
2325 #define next_tree    (t = va_arg (*text->args_ptr, tree))
2326 #define next_tcode   va_arg (*text->args_ptr, enum tree_code)
2327 #define next_lang    va_arg (*text->args_ptr, enum languages)
2328 #define next_int     va_arg (*text->args_ptr, int)
2329
2330   if (precision != 0 || wide)
2331     return false;
2332
2333   if (text->locus == NULL)
2334     set_locus = false;
2335
2336   switch (*spec)
2337     {
2338     case 'A': result = args_to_string (next_tree, verbose);     break;
2339     case 'C': result = code_to_string (next_tcode);             break;
2340     case 'D':
2341       {
2342         tree temp = next_tree;
2343         if (DECL_P (temp)
2344             && DECL_DEBUG_EXPR_IS_FROM (temp) && DECL_DEBUG_EXPR (temp))
2345           {
2346             temp = DECL_DEBUG_EXPR (temp);
2347             if (!DECL_P (temp))
2348               {
2349                 result = expr_to_string (temp);
2350                 break;
2351               }
2352           }
2353         result = decl_to_string (temp, verbose);
2354       }
2355       break;
2356     case 'E': result = expr_to_string (next_tree);              break;
2357     case 'F': result = fndecl_to_string (next_tree, verbose);   break;
2358     case 'L': result = language_to_string (next_lang);          break;
2359     case 'O': result = op_to_string (next_tcode);               break;
2360     case 'P': result = parm_to_string (next_int);               break;
2361     case 'Q': result = assop_to_string (next_tcode);            break;
2362     case 'T': result = type_to_string (next_tree, verbose);     break;
2363     case 'V': result = cv_to_string (next_tree, verbose);       break;
2364
2365     default:
2366       return false;
2367     }
2368
2369   pp_base_string (pp, result);
2370   if (set_locus && t != NULL)
2371     *text->locus = location_of (t);
2372   return true;
2373 #undef next_tree
2374 #undef next_tcode
2375 #undef next_lang
2376 #undef next_int
2377 }
2378 \f
2379 /* Callback from cpp_error for PFILE to print diagnostics arising from
2380    interpreting strings.  The diagnostic is of type LEVEL; MSG is the
2381    translated message and AP the arguments.  */
2382
2383 void
2384 cp_cpp_error (cpp_reader *pfile ATTRIBUTE_UNUSED, int level,
2385               const char *msg, va_list *ap)
2386 {
2387   diagnostic_info diagnostic;
2388   diagnostic_t dlevel;
2389   switch (level)
2390     {
2391     case CPP_DL_WARNING:
2392     case CPP_DL_WARNING_SYSHDR:
2393       dlevel = DK_WARNING;
2394       break;
2395     case CPP_DL_PEDWARN:
2396       dlevel = pedantic_error_kind ();
2397       break;
2398     case CPP_DL_ERROR:
2399       dlevel = DK_ERROR;
2400       break;
2401     case CPP_DL_ICE:
2402       dlevel = DK_ICE;
2403       break;
2404     default:
2405       gcc_unreachable ();
2406     }
2407   diagnostic_set_info_translated (&diagnostic, msg, ap,
2408                                   input_location, dlevel);
2409   report_diagnostic (&diagnostic);
2410 }