gcc/c-family/c-pretty-print.c

   1 /* Subroutines common to both C and C++ pretty-printers.
   2    Copyright (C) 2002-2015 Free Software Foundation, Inc.
   3    Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "alias.h"
  26 #include "symtab.h"
  27 #include "options.h"
  28 #include "tree.h"
  29 #include "stor-layout.h"
  30 #include "attribs.h"
  31 #include "intl.h"
  32 #include "c-pretty-print.h"
  33 #include "tree-pretty-print.h"
  34 #include "tree-iterator.h"
  35 #include "diagnostic.h"
  36 #include "wide-int-print.h"
  37
  38 /* The pretty-printer code is primarily designed to closely follow
  39    (GNU) C and C++ grammars.  That is to be contrasted with spaghetti
  40    codes we used to have in the past.  Following a structured
  41    approach (preferably the official grammars) is believed to make it
  42    much easier to add extensions and nifty pretty-printing effects that
  43    takes expression or declaration contexts into account.  */
  44
  45
  46 #define pp_c_maybe_whitespace(PP)            \
  47    do {                                      \
  48      if ((PP)->padding == pp_before) \
  49        pp_c_whitespace (PP);                 \
  50    } while (0)
  51
  52 /* literal  */
  53 static void pp_c_char (c_pretty_printer *, int);
  54
  55 /* postfix-expression  */
  56 static void pp_c_initializer_list (c_pretty_printer *, tree);
  57 static void pp_c_brace_enclosed_initializer_list (c_pretty_printer *, tree);
  58
  59 static void pp_c_additive_expression (c_pretty_printer *, tree);
  60 static void pp_c_shift_expression (c_pretty_printer *, tree);
  61 static void pp_c_relational_expression (c_pretty_printer *, tree);
  62 static void pp_c_equality_expression (c_pretty_printer *, tree);
  63 static void pp_c_and_expression (c_pretty_printer *, tree);
  64 static void pp_c_exclusive_or_expression (c_pretty_printer *, tree);
  65 static void pp_c_inclusive_or_expression (c_pretty_printer *, tree);
  66 static void pp_c_logical_and_expression (c_pretty_printer *, tree);
  67
  68 /* declarations.  */
  69
  70 \f
  71 /* Helper functions.  */
  72
  73 void
  74 pp_c_whitespace (c_pretty_printer *pp)
  75 {
  76   pp_space (pp);
  77   pp->padding = pp_none;
  78 }
  79
  80 void
  81 pp_c_left_paren (c_pretty_printer *pp)
  82 {
  83   pp_left_paren (pp);
  84   pp->padding = pp_none;
  85 }
  86
  87 void
  88 pp_c_right_paren (c_pretty_printer *pp)
  89 {
  90   pp_right_paren (pp);
  91   pp->padding = pp_none;
  92 }
  93
  94 void
  95 pp_c_left_brace (c_pretty_printer *pp)
  96 {
  97   pp_left_brace (pp);
  98   pp->padding = pp_none;
  99 }
 100
 101 void
 102 pp_c_right_brace (c_pretty_printer *pp)
 103 {
 104   pp_right_brace (pp);
 105   pp->padding = pp_none;
 106 }
 107
 108 void
 109 pp_c_left_bracket (c_pretty_printer *pp)
 110 {
 111   pp_left_bracket (pp);
 112   pp->padding = pp_none;
 113 }
 114
 115 void
 116 pp_c_right_bracket (c_pretty_printer *pp)
 117 {
 118   pp_right_bracket (pp);
 119   pp->padding = pp_none;
 120 }
 121
 122 void
 123 pp_c_dot (c_pretty_printer *pp)
 124 {
 125   pp_dot (pp);
 126   pp->padding = pp_none;
 127 }
 128
 129 void
 130 pp_c_ampersand (c_pretty_printer *pp)
 131 {
 132   pp_ampersand (pp);
 133   pp->padding = pp_none;
 134 }
 135
 136 void
 137 pp_c_star (c_pretty_printer *pp)
 138 {
 139   pp_star (pp);
 140   pp->padding = pp_none;
 141 }
 142
 143 void
 144 pp_c_arrow (c_pretty_printer *pp)
 145 {
 146   pp_arrow (pp);
 147   pp->padding = pp_none;
 148 }
 149
 150 void
 151 pp_c_semicolon (c_pretty_printer *pp)
 152 {
 153   pp_semicolon (pp);
 154   pp->padding = pp_none;
 155 }
 156
 157 void
 158 pp_c_complement (c_pretty_printer *pp)
 159 {
 160   pp_complement (pp);
 161   pp->padding = pp_none;
 162 }
 163
 164 void
 165 pp_c_exclamation (c_pretty_printer *pp)
 166 {
 167   pp_exclamation (pp);
 168   pp->padding = pp_none;
 169 }
 170
 171 /* Print out the external representation of QUALIFIERS.  */
 172
 173 void
 174 pp_c_cv_qualifiers (c_pretty_printer *pp, int qualifiers, bool func_type)
 175 {
 176   const char *p = pp_last_position_in_text (pp);
 177   bool previous = false;
 178
 179   if (!qualifiers)
 180     return;
 181
 182   /* The C programming language does not have references, but it is much
 183      simpler to handle those here rather than going through the same
 184      logic in the C++ pretty-printer.  */
 185   if (p != NULL && (*p == '*' || *p == '&'))
 186     pp_c_whitespace (pp);
 187
 188   if (qualifiers & TYPE_QUAL_ATOMIC)
 189     {
 190       pp_c_ws_string (pp, "_Atomic");
 191       previous = true;
 192     }
 193
 194   if (qualifiers & TYPE_QUAL_CONST)
 195     {
 196       if (previous)
 197         pp_c_whitespace (pp);
 198       pp_c_ws_string (pp, func_type ? "__attribute__((const))" : "const");
 199       previous = true;
 200     }
 201
 202   if (qualifiers & TYPE_QUAL_VOLATILE)
 203     {
 204       if (previous)
 205         pp_c_whitespace (pp);
 206       pp_c_ws_string (pp, func_type ? "__attribute__((noreturn))" : "volatile");
 207       previous = true;
 208     }
 209
 210   if (qualifiers & TYPE_QUAL_RESTRICT)
 211     {
 212       if (previous)
 213         pp_c_whitespace (pp);
 214       pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx ()
 215                            ? "restrict" : "__restrict__"));
 216     }
 217 }
 218
 219 /* Pretty-print T using the type-cast notation '( type-name )'.  */
 220
 221 static void
 222 pp_c_type_cast (c_pretty_printer *pp, tree t)
 223 {
 224   pp_c_left_paren (pp);
 225   pp->type_id (t);
 226   pp_c_right_paren (pp);
 227 }
 228
 229 /* We're about to pretty-print a pointer type as indicated by T.
 230    Output a whitespace, if needed, preparing for subsequent output.  */
 231
 232 void
 233 pp_c_space_for_pointer_operator (c_pretty_printer *pp, tree t)
 234 {
 235   if (POINTER_TYPE_P (t))
 236     {
 237       tree pointee = strip_pointer_operator (TREE_TYPE (t));
 238       if (TREE_CODE (pointee) != ARRAY_TYPE
 239           && TREE_CODE (pointee) != FUNCTION_TYPE)
 240         pp_c_whitespace (pp);
 241     }
 242 }
 243
 244 \f
 245 /* Declarations.  */
 246
 247 /* C++ cv-qualifiers are called type-qualifiers in C.  Print out the
 248    cv-qualifiers of T.  If T is a declaration then it is the cv-qualifier
 249    of its type.  Take care of possible extensions.
 250
 251    type-qualifier-list:
 252        type-qualifier
 253        type-qualifier-list type-qualifier
 254
 255    type-qualifier:
 256        const
 257        restrict                              -- C99
 258        __restrict__                          -- GNU C
 259        address-space-qualifier               -- GNU C
 260        volatile
 261        _Atomic                               -- C11
 262
 263    address-space-qualifier:
 264        identifier                            -- GNU C  */
 265
 266 void
 267 pp_c_type_qualifier_list (c_pretty_printer *pp, tree t)
 268 {
 269   int qualifiers;
 270
 271   if (!t || t == error_mark_node)
 272     return;
 273
 274   if (!TYPE_P (t))
 275     t = TREE_TYPE (t);
 276
 277   qualifiers = TYPE_QUALS (t);
 278   pp_c_cv_qualifiers (pp, qualifiers,
 279                       TREE_CODE (t) == FUNCTION_TYPE);
 280
 281   if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (t)))
 282     {
 283       const char *as = c_addr_space_name (TYPE_ADDR_SPACE (t));
 284       pp_c_identifier (pp, as);
 285     }
 286 }
 287
 288 /* pointer:
 289       * type-qualifier-list(opt)
 290       * type-qualifier-list(opt) pointer  */
 291
 292 static void
 293 pp_c_pointer (c_pretty_printer *pp, tree t)
 294 {
 295   if (!TYPE_P (t) && TREE_CODE (t) != TYPE_DECL)
 296     t = TREE_TYPE (t);
 297   switch (TREE_CODE (t))
 298     {
 299     case POINTER_TYPE:
 300       /* It is easier to handle C++ reference types here.  */
 301     case REFERENCE_TYPE:
 302       if (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE)
 303         pp_c_pointer (pp, TREE_TYPE (t));
 304       if (TREE_CODE (t) == POINTER_TYPE)
 305         pp_c_star (pp);
 306       else
 307         pp_c_ampersand (pp);
 308       pp_c_type_qualifier_list (pp, t);
 309       break;
 310
 311       /* ??? This node is now in GENERIC and so shouldn't be here.  But
 312          we'll fix that later.  */
 313     case DECL_EXPR:
 314       pp->declaration (DECL_EXPR_DECL (t));
 315       pp_needs_newline (pp) = true;
 316       break;
 317
 318     default:
 319       pp_unsupported_tree (pp, t);
 320     }
 321 }
 322
 323 /* simple-type-specifier:
 324      type-specifier
 325
 326    type-specifier:
 327       void
 328       char
 329       short
 330       int
 331       long
 332       float
 333       double
 334       signed
 335       unsigned
 336       _Bool                          -- C99
 337       _Complex                       -- C99
 338       _Imaginary                     -- C99
 339       struct-or-union-specifier
 340       enum-specifier
 341       typedef-name.
 342
 343   GNU extensions.
 344   simple-type-specifier:
 345       __complex__
 346       __vector__   */
 347
 348 void
 349 c_pretty_printer::simple_type_specifier (tree t)
 350 {
 351   const enum tree_code code = TREE_CODE (t);
 352   switch (code)
 353     {
 354     case ERROR_MARK:
 355       translate_string ("<type-error>");
 356       break;
 357
 358     case IDENTIFIER_NODE:
 359       pp_c_identifier (this, IDENTIFIER_POINTER (t));
 360       break;
 361
 362     case VOID_TYPE:
 363     case BOOLEAN_TYPE:
 364     case INTEGER_TYPE:
 365     case REAL_TYPE:
 366     case FIXED_POINT_TYPE:
 367       if (TYPE_NAME (t))
 368         {
 369           t = TYPE_NAME (t);
 370           simple_type_specifier (t);
 371         }
 372       else
 373         {
 374           int prec = TYPE_PRECISION (t);
 375           if (ALL_FIXED_POINT_MODE_P (TYPE_MODE (t)))
 376             t = c_common_type_for_mode (TYPE_MODE (t), TYPE_SATURATING (t));
 377           else
 378             t = c_common_type_for_mode (TYPE_MODE (t), TYPE_UNSIGNED (t));
 379           if (TYPE_NAME (t))
 380             {
 381               simple_type_specifier (t);
 382               if (TYPE_PRECISION (t) != prec)
 383                 {
 384                   pp_colon (this);
 385                   pp_decimal_int (this, prec);
 386                 }
 387             }
 388           else
 389             {
 390               switch (code)
 391                 {
 392                 case INTEGER_TYPE:
 393                   translate_string (TYPE_UNSIGNED (t)
 394                                     ? "<unnamed-unsigned:"
 395                                     : "<unnamed-signed:");
 396                   break;
 397                 case REAL_TYPE:
 398                   translate_string ("<unnamed-float:");
 399                   break;
 400                 case FIXED_POINT_TYPE:
 401                   translate_string ("<unnamed-fixed:");
 402                   break;
 403                 default:
 404                   gcc_unreachable ();
 405                 }
 406               pp_decimal_int (this, prec);
 407               pp_greater (this);
 408             }
 409         }
 410       break;
 411
 412     case TYPE_DECL:
 413       if (DECL_NAME (t))
 414         id_expression (t);
 415       else
 416         translate_string ("<typedef-error>");
 417       break;
 418
 419     case UNION_TYPE:
 420     case RECORD_TYPE:
 421     case ENUMERAL_TYPE:
 422       if (TYPE_NAME (t) && TREE_CODE (TYPE_NAME (t)) == TYPE_DECL)
 423         /* Don't decorate the type if this is a typedef name.  */;
 424       else if (code == UNION_TYPE)
 425         pp_c_ws_string (this, "union");
 426       else if (code == RECORD_TYPE)
 427         pp_c_ws_string (this, "struct");
 428       else if (code == ENUMERAL_TYPE)
 429         pp_c_ws_string (this, "enum");
 430       else
 431         translate_string ("<tag-error>");
 432
 433       if (TYPE_NAME (t))
 434         id_expression (TYPE_NAME (t));
 435       else
 436         translate_string ("<anonymous>");
 437       break;
 438
 439     default:
 440       pp_unsupported_tree (this, t);
 441       break;
 442     }
 443 }
 444
 445 /* specifier-qualifier-list:
 446       type-specifier specifier-qualifier-list-opt
 447       type-qualifier specifier-qualifier-list-opt
 448
 449
 450   Implementation note:  Because of the non-linearities in array or
 451   function declarations, this routine prints not just the
 452   specifier-qualifier-list of such entities or types of such entities,
 453   but also the 'pointer' production part of their declarators.  The
 454   remaining part is done by declarator() or abstract_declarator().  */
 455
 456 void
 457 pp_c_specifier_qualifier_list (c_pretty_printer *pp, tree t)
 458 {
 459   const enum tree_code code = TREE_CODE (t);
 460
 461   if (!(pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE)
 462     pp_c_type_qualifier_list (pp, t);
 463   switch (code)
 464     {
 465     case REFERENCE_TYPE:
 466     case POINTER_TYPE:
 467       {
 468         /* Get the types-specifier of this type.  */
 469         tree pointee = strip_pointer_operator (TREE_TYPE (t));
 470         pp_c_specifier_qualifier_list (pp, pointee);
 471         if (TREE_CODE (pointee) == ARRAY_TYPE
 472             || TREE_CODE (pointee) == FUNCTION_TYPE)
 473           {
 474             pp_c_whitespace (pp);
 475             pp_c_left_paren (pp);
 476             pp_c_attributes_display (pp, TYPE_ATTRIBUTES (pointee));
 477           }
 478         else if (!c_dialect_cxx ())
 479           pp_c_whitespace (pp);
 480         pp_ptr_operator (pp, t);
 481       }
 482       break;
 483
 484     case FUNCTION_TYPE:
 485     case ARRAY_TYPE:
 486       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 487       break;
 488
 489     case VECTOR_TYPE:
 490     case COMPLEX_TYPE:
 491       if (code == COMPLEX_TYPE)
 492         pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx ()
 493                              ? "_Complex" : "__complex__"));
 494       else if (code == VECTOR_TYPE)
 495         {
 496           pp_c_ws_string (pp, "__vector");
 497           pp_c_left_paren (pp);
 498           pp_wide_integer (pp, TYPE_VECTOR_SUBPARTS (t));
 499           pp_c_right_paren (pp);
 500           pp_c_whitespace (pp);
 501         }
 502       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 503       break;
 504
 505     default:
 506       pp->simple_type_specifier (t);
 507       break;
 508     }
 509   if ((pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE)
 510     pp_c_type_qualifier_list (pp, t);
 511 }
 512
 513 /* parameter-type-list:
 514       parameter-list
 515       parameter-list , ...
 516
 517    parameter-list:
 518       parameter-declaration
 519       parameter-list , parameter-declaration
 520
 521    parameter-declaration:
 522       declaration-specifiers declarator
 523       declaration-specifiers abstract-declarator(opt)   */
 524
 525 void
 526 pp_c_parameter_type_list (c_pretty_printer *pp, tree t)
 527 {
 528   bool want_parm_decl = DECL_P (t) && !(pp->flags & pp_c_flag_abstract);
 529   tree parms = want_parm_decl ? DECL_ARGUMENTS (t) :  TYPE_ARG_TYPES (t);
 530   pp_c_left_paren (pp);
 531   if (parms == void_list_node)
 532     pp_c_ws_string (pp, "void");
 533   else
 534     {
 535       bool first = true;
 536       for ( ; parms && parms != void_list_node; parms = TREE_CHAIN (parms))
 537         {
 538           if (!first)
 539             pp_separate_with (pp, ',');
 540           first = false;
 541           pp->declaration_specifiers
 542             (want_parm_decl ? parms : TREE_VALUE (parms));
 543           if (want_parm_decl)
 544             pp->declarator (parms);
 545           else
 546             pp->abstract_declarator (TREE_VALUE (parms));
 547         }
 548     }
 549   pp_c_right_paren (pp);
 550 }
 551
 552 /* abstract-declarator:
 553       pointer
 554       pointer(opt) direct-abstract-declarator  */
 555
 556 void
 557 c_pretty_printer::abstract_declarator (tree t)
 558 {
 559   if (TREE_CODE (t) == POINTER_TYPE)
 560     {
 561       if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE
 562           || TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE)
 563         pp_c_right_paren (this);
 564       t = TREE_TYPE (t);
 565     }
 566
 567   direct_abstract_declarator (t);
 568 }
 569
 570 /* direct-abstract-declarator:
 571       ( abstract-declarator )
 572       direct-abstract-declarator(opt) [ assignment-expression(opt) ]
 573       direct-abstract-declarator(opt) [ * ]
 574       direct-abstract-declarator(opt) ( parameter-type-list(opt) )  */
 575
 576 void
 577 c_pretty_printer::direct_abstract_declarator (tree t)
 578 {
 579   switch (TREE_CODE (t))
 580     {
 581     case POINTER_TYPE:
 582       abstract_declarator (t);
 583       break;
 584
 585     case FUNCTION_TYPE:
 586       pp_c_parameter_type_list (this, t);
 587       direct_abstract_declarator (TREE_TYPE (t));
 588       break;
 589
 590     case ARRAY_TYPE:
 591       pp_c_left_bracket (this);
 592       if (TYPE_DOMAIN (t) && TYPE_MAX_VALUE (TYPE_DOMAIN (t)))
 593         {
 594           tree maxval = TYPE_MAX_VALUE (TYPE_DOMAIN (t));
 595           tree type = TREE_TYPE (maxval);
 596
 597           if (tree_fits_shwi_p (maxval))
 598             pp_wide_integer (this, tree_to_shwi (maxval) + 1);
 599           else
 600             expression (fold_build2 (PLUS_EXPR, type, maxval,
 601                                      build_int_cst (type, 1)));
 602         }
 603       pp_c_right_bracket (this);
 604       direct_abstract_declarator (TREE_TYPE (t));
 605       break;
 606
 607     case IDENTIFIER_NODE:
 608     case VOID_TYPE:
 609     case BOOLEAN_TYPE:
 610     case INTEGER_TYPE:
 611     case REAL_TYPE:
 612     case FIXED_POINT_TYPE:
 613     case ENUMERAL_TYPE:
 614     case RECORD_TYPE:
 615     case UNION_TYPE:
 616     case VECTOR_TYPE:
 617     case COMPLEX_TYPE:
 618     case TYPE_DECL:
 619       break;
 620
 621     default:
 622       pp_unsupported_tree (this, t);
 623       break;
 624     }
 625 }
 626
 627 /* type-name:
 628       specifier-qualifier-list  abstract-declarator(opt)  */
 629
 630 void
 631 c_pretty_printer::type_id (tree t)
 632 {
 633   pp_c_specifier_qualifier_list (this, t);
 634   abstract_declarator (t);
 635 }
 636
 637 /* storage-class-specifier:
 638       typedef
 639       extern
 640       static
 641       auto
 642       register  */
 643
 644 void
 645 c_pretty_printer::storage_class_specifier (tree t)
 646 {
 647   if (TREE_CODE (t) == TYPE_DECL)
 648     pp_c_ws_string (this, "typedef");
 649   else if (DECL_P (t))
 650     {
 651       if (DECL_REGISTER (t))
 652         pp_c_ws_string (this, "register");
 653       else if (TREE_STATIC (t) && TREE_CODE (t) == VAR_DECL)
 654         pp_c_ws_string (this, "static");
 655     }
 656 }
 657
 658 /* function-specifier:
 659       inline   */
 660
 661 void
 662 c_pretty_printer::function_specifier (tree t)
 663 {
 664   if (TREE_CODE (t) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (t))
 665     pp_c_ws_string (this, "inline");
 666 }
 667
 668 /* declaration-specifiers:
 669       storage-class-specifier declaration-specifiers(opt)
 670       type-specifier declaration-specifiers(opt)
 671       type-qualifier declaration-specifiers(opt)
 672       function-specifier declaration-specifiers(opt)  */
 673
 674 void
 675 c_pretty_printer::declaration_specifiers (tree t)
 676 {
 677   storage_class_specifier (t);
 678   function_specifier (t);
 679   pp_c_specifier_qualifier_list (this, DECL_P (t) ?  TREE_TYPE (t) : t);
 680 }
 681
 682 /* direct-declarator
 683       identifier
 684       ( declarator )
 685       direct-declarator [ type-qualifier-list(opt) assignment-expression(opt) ]
 686       direct-declarator [ static type-qualifier-list(opt) assignment-expression(opt)]
 687       direct-declarator [ type-qualifier-list static assignment-expression ]
 688       direct-declarator [ type-qualifier-list * ]
 689       direct-declarator ( parameter-type-list )
 690       direct-declarator ( identifier-list(opt) )  */
 691
 692 void
 693 c_pretty_printer::direct_declarator (tree t)
 694 {
 695   switch (TREE_CODE (t))
 696     {
 697     case VAR_DECL:
 698     case PARM_DECL:
 699     case TYPE_DECL:
 700     case FIELD_DECL:
 701     case LABEL_DECL:
 702       pp_c_space_for_pointer_operator (this, TREE_TYPE (t));
 703       pp_c_tree_decl_identifier (this, t);
 704       break;
 705
 706     case ARRAY_TYPE:
 707     case POINTER_TYPE:
 708       abstract_declarator (TREE_TYPE (t));
 709       break;
 710
 711     case FUNCTION_TYPE:
 712       pp_parameter_list (this, t);
 713       abstract_declarator (TREE_TYPE (t));
 714       break;
 715
 716     case FUNCTION_DECL:
 717       pp_c_space_for_pointer_operator (this, TREE_TYPE (TREE_TYPE (t)));
 718       pp_c_tree_decl_identifier (this, t);
 719       if (flags & pp_c_flag_abstract)
 720         abstract_declarator (TREE_TYPE (t));
 721       else
 722         {
 723           pp_parameter_list (this, t);
 724           abstract_declarator (TREE_TYPE (TREE_TYPE (t)));
 725         }
 726       break;
 727
 728     case INTEGER_TYPE:
 729     case REAL_TYPE:
 730     case FIXED_POINT_TYPE:
 731     case ENUMERAL_TYPE:
 732     case UNION_TYPE:
 733     case RECORD_TYPE:
 734       break;
 735
 736     default:
 737       pp_unsupported_tree (this, t);
 738       break;
 739     }
 740 }
 741
 742
 743 /* declarator:
 744       pointer(opt)  direct-declarator   */
 745
 746 void
 747 c_pretty_printer::declarator (tree t)
 748 {
 749   switch (TREE_CODE (t))
 750     {
 751     case INTEGER_TYPE:
 752     case REAL_TYPE:
 753     case FIXED_POINT_TYPE:
 754     case ENUMERAL_TYPE:
 755     case UNION_TYPE:
 756     case RECORD_TYPE:
 757       break;
 758
 759     case VAR_DECL:
 760     case PARM_DECL:
 761     case FIELD_DECL:
 762     case ARRAY_TYPE:
 763     case FUNCTION_TYPE:
 764     case FUNCTION_DECL:
 765     case TYPE_DECL:
 766       direct_declarator (t);
 767     break;
 768
 769
 770     default:
 771       pp_unsupported_tree (this, t);
 772       break;
 773     }
 774 }
 775
 776 /* declaration:
 777       declaration-specifiers init-declarator-list(opt) ;  */
 778
 779 void
 780 c_pretty_printer::declaration (tree t)
 781 {
 782   declaration_specifiers (t);
 783   pp_c_init_declarator (this, t);
 784 }
 785
 786 /* Pretty-print ATTRIBUTES using GNU C extension syntax.  */
 787
 788 void
 789 pp_c_attributes (c_pretty_printer *pp, tree attributes)
 790 {
 791   if (attributes == NULL_TREE)
 792     return;
 793
 794   pp_c_ws_string (pp, "__attribute__");
 795   pp_c_left_paren (pp);
 796   pp_c_left_paren (pp);
 797   for (; attributes != NULL_TREE; attributes = TREE_CHAIN (attributes))
 798     {
 799       pp_tree_identifier (pp, TREE_PURPOSE (attributes));
 800       if (TREE_VALUE (attributes))
 801         pp_c_call_argument_list (pp, TREE_VALUE (attributes));
 802
 803       if (TREE_CHAIN (attributes))
 804         pp_separate_with (pp, ',');
 805     }
 806   pp_c_right_paren (pp);
 807   pp_c_right_paren (pp);
 808 }
 809
 810 /* Pretty-print ATTRIBUTES using GNU C extension syntax for attributes
 811    marked to be displayed on disgnostic.  */
 812
 813 void
 814 pp_c_attributes_display (c_pretty_printer *pp, tree a)
 815 {
 816   bool is_first = true;
 817
 818   if (a == NULL_TREE)
 819     return;
 820
 821   for (; a != NULL_TREE; a = TREE_CHAIN (a))
 822     {
 823       const struct attribute_spec *as;
 824       as = lookup_attribute_spec (TREE_PURPOSE (a));
 825       if (!as || as->affects_type_identity == false)
 826         continue;
 827       if (is_first)
 828        {
 829          pp_c_ws_string (pp, "__attribute__");
 830          pp_c_left_paren (pp);
 831          pp_c_left_paren (pp);
 832          is_first = false;
 833        }
 834       else
 835        {
 836          pp_separate_with (pp, ',');
 837        }
 838       pp_tree_identifier (pp, TREE_PURPOSE (a));
 839       if (TREE_VALUE (a))
 840        pp_c_call_argument_list (pp, TREE_VALUE (a));
 841     }
 842
 843   if (!is_first)
 844     {
 845       pp_c_right_paren (pp);
 846       pp_c_right_paren (pp);
 847       pp_c_whitespace (pp);
 848     }
 849 }
 850
 851 /* function-definition:
 852       declaration-specifiers declarator compound-statement  */
 853
 854 void
 855 pp_c_function_definition (c_pretty_printer *pp, tree t)
 856 {
 857   pp->declaration_specifiers (t);
 858   pp->declarator (t);
 859   pp_needs_newline (pp) = true;
 860   pp->statement (DECL_SAVED_TREE (t));
 861   pp_newline_and_flush (pp);
 862 }
 863
 864 \f
 865 /* Expressions.  */
 866
 867 /* Print out a c-char.  This is called solely for characters which are
 868    in the *target* execution character set.  We ought to convert them
 869    back to the *host* execution character set before printing, but we
 870    have no way to do this at present.  A decent compromise is to print
 871    all characters as if they were in the host execution character set,
 872    and not attempt to recover any named escape characters, but render
 873    all unprintables as octal escapes.  If the host and target character
 874    sets are the same, this produces relatively readable output.  If they
 875    are not the same, strings may appear as gibberish, but that's okay
 876    (in fact, it may well be what the reader wants, e.g. if they are looking
 877    to see if conversion to the target character set happened correctly).
 878
 879    A special case: we need to prefix \, ", and ' with backslashes.  It is
 880    correct to do so for the *host*'s \, ", and ', because the rest of the
 881    file appears in the host character set.  */
 882
 883 static void
 884 pp_c_char (c_pretty_printer *pp, int c)
 885 {
 886   if (ISPRINT (c))
 887     {
 888       switch (c)
 889         {
 890         case '\\': pp_string (pp, "\\\\"); break;
 891         case '\'': pp_string (pp, "\\\'"); break;
 892         case '\"': pp_string (pp, "\\\""); break;
 893         default:   pp_character (pp, c);
 894         }
 895     }
 896   else
 897     pp_scalar (pp, "\\%03o", (unsigned) c);
 898 }
 899
 900 /* Print out a STRING literal.  */
 901
 902 void
 903 pp_c_string_literal (c_pretty_printer *pp, tree s)
 904 {
 905   const char *p = TREE_STRING_POINTER (s);
 906   int n = TREE_STRING_LENGTH (s) - 1;
 907   int i;
 908   pp_doublequote (pp);
 909   for (i = 0; i < n; ++i)
 910     pp_c_char (pp, p[i]);
 911   pp_doublequote (pp);
 912 }
 913
 914 /* Pretty-print a VOID_CST (void_node).  */
 915
 916 static void
 917 pp_c_void_constant (c_pretty_printer *pp)
 918 {
 919   pp_c_type_cast (pp, void_type_node);
 920   pp_string (pp, "0");
 921 }
 922
 923 /* Pretty-print an INTEGER literal.  */
 924
 925 static void
 926 pp_c_integer_constant (c_pretty_printer *pp, tree i)
 927 {
 928   int idx;
 929
 930   /* We are going to compare the type of I to other types using
 931      pointer comparison so we need to use its canonical type.  */
 932   tree type =
 933     TYPE_CANONICAL (TREE_TYPE (i))
 934     ? TYPE_CANONICAL (TREE_TYPE (i))
 935     : TREE_TYPE (i);
 936
 937   if (tree_fits_shwi_p (i))
 938     pp_wide_integer (pp, tree_to_shwi (i));
 939   else if (tree_fits_uhwi_p (i))
 940     pp_unsigned_wide_integer (pp, tree_to_uhwi (i));
 941   else
 942     {
 943       wide_int wi = i;
 944
 945       if (wi::lt_p (i, 0, TYPE_SIGN (TREE_TYPE (i))))
 946         {
 947           pp_minus (pp);
 948           wi = -wi;
 949         }
 950       print_hex (wi, pp_buffer (pp)->digit_buffer);
 951       pp_string (pp, pp_buffer (pp)->digit_buffer);
 952     }
 953   if (TYPE_UNSIGNED (type))
 954     pp_character (pp, 'u');
 955   if (type == long_integer_type_node || type == long_unsigned_type_node)
 956     pp_character (pp, 'l');
 957   else if (type == long_long_integer_type_node
 958            || type == long_long_unsigned_type_node)
 959     pp_string (pp, "ll");
 960   else for (idx = 0; idx < NUM_INT_N_ENTS; idx ++)
 961     if (int_n_enabled_p[idx])
 962       {
 963         char buf[2+20];
 964         if (type == int_n_trees[idx].signed_type
 965             || type == int_n_trees[idx].unsigned_type)
 966           {
 967             sprintf (buf, "I%d", int_n_data[idx].bitsize);
 968             pp_string (pp, buf);
 969           }
 970       }
 971 }
 972
 973 /* Print out a CHARACTER literal.  */
 974
 975 static void
 976 pp_c_character_constant (c_pretty_printer *pp, tree c)
 977 {
 978   pp_quote (pp);
 979   pp_c_char (pp, (unsigned) TREE_INT_CST_LOW (c));
 980   pp_quote (pp);
 981 }
 982
 983 /* Print out a BOOLEAN literal.  */
 984
 985 static void
 986 pp_c_bool_constant (c_pretty_printer *pp, tree b)
 987 {
 988   if (b == boolean_false_node)
 989     {
 990       if (c_dialect_cxx ())
 991         pp_c_ws_string (pp, "false");
 992       else if (flag_isoc99)
 993         pp_c_ws_string (pp, "_False");
 994       else
 995         pp_unsupported_tree (pp, b);
 996     }
 997   else if (b == boolean_true_node)
 998     {
 999       if (c_dialect_cxx ())
1000         pp_c_ws_string (pp, "true");
1001       else if (flag_isoc99)
1002         pp_c_ws_string (pp, "_True");
1003       else
1004         pp_unsupported_tree (pp, b);
1005     }
1006   else if (TREE_CODE (b) == INTEGER_CST)
1007     pp_c_integer_constant (pp, b);
1008   else
1009     pp_unsupported_tree (pp, b);
1010 }
1011
1012 /* Attempt to print out an ENUMERATOR.  Return true on success.  Else return
1013    false; that means the value was obtained by a cast, in which case
1014    print out the type-id part of the cast-expression -- the casted value
1015    is then printed by pp_c_integer_literal.  */
1016
1017 static bool
1018 pp_c_enumeration_constant (c_pretty_printer *pp, tree e)
1019 {
1020   bool value_is_named = true;
1021   tree type = TREE_TYPE (e);
1022   tree value;
1023
1024   /* Find the name of this constant.  */
1025   for (value = TYPE_VALUES (type);
1026        value != NULL_TREE && !tree_int_cst_equal (TREE_VALUE (value), e);
1027        value = TREE_CHAIN (value))
1028     ;
1029
1030   if (value != NULL_TREE)
1031     pp->id_expression (TREE_PURPOSE (value));
1032   else
1033     {
1034       /* Value must have been cast.  */
1035       pp_c_type_cast (pp, type);
1036       value_is_named = false;
1037     }
1038
1039   return value_is_named;
1040 }
1041
1042 /* Print out a REAL value as a decimal-floating-constant.  */
1043
1044 static void
1045 pp_c_floating_constant (c_pretty_printer *pp, tree r)
1046 {
1047   const struct real_format *fmt
1048     = REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (r)));
1049
1050   REAL_VALUE_TYPE floating_cst = TREE_REAL_CST (r);
1051   bool is_decimal = floating_cst.decimal;
1052
1053   /* See ISO C++ WG N1822.  Note: The fraction 643/2136 approximates
1054      log10(2) to 7 significant digits.  */
1055   int max_digits10 = 2 + (is_decimal ? fmt->p : fmt->p * 643L / 2136);
1056
1057   real_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_REAL_CST (r),
1058                    sizeof (pp_buffer (pp)->digit_buffer),
1059                    max_digits10, 1);
1060
1061   pp_string (pp, pp_buffer(pp)->digit_buffer);
1062   if (TREE_TYPE (r) == float_type_node)
1063     pp_character (pp, 'f');
1064   else if (TREE_TYPE (r) == long_double_type_node)
1065     pp_character (pp, 'l');
1066   else if (TREE_TYPE (r) == dfloat128_type_node)
1067     pp_string (pp, "dl");
1068   else if (TREE_TYPE (r) == dfloat64_type_node)
1069     pp_string (pp, "dd");
1070   else if (TREE_TYPE (r) == dfloat32_type_node)
1071     pp_string (pp, "df");
1072 }
1073
1074 /* Print out a FIXED value as a decimal-floating-constant.  */
1075
1076 static void
1077 pp_c_fixed_constant (c_pretty_printer *pp, tree r)
1078 {
1079   fixed_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_FIXED_CST (r),
1080                    sizeof (pp_buffer (pp)->digit_buffer));
1081   pp_string (pp, pp_buffer(pp)->digit_buffer);
1082 }
1083
1084 /* Pretty-print a compound literal expression.  GNU extensions include
1085    vector constants.  */
1086
1087 static void
1088 pp_c_compound_literal (c_pretty_printer *pp, tree e)
1089 {
1090   tree type = TREE_TYPE (e);
1091   pp_c_type_cast (pp, type);
1092
1093   switch (TREE_CODE (type))
1094     {
1095     case RECORD_TYPE:
1096     case UNION_TYPE:
1097     case ARRAY_TYPE:
1098     case VECTOR_TYPE:
1099     case COMPLEX_TYPE:
1100       pp_c_brace_enclosed_initializer_list (pp, e);
1101       break;
1102
1103     default:
1104       pp_unsupported_tree (pp, e);
1105       break;
1106     }
1107 }
1108
1109 /* Pretty-print a COMPLEX_EXPR expression.  */
1110
1111 static void
1112 pp_c_complex_expr (c_pretty_printer *pp, tree e)
1113 {
1114   /* Handle a few common special cases, otherwise fallback
1115      to printing it as compound literal.  */
1116   tree type = TREE_TYPE (e);
1117   tree realexpr = TREE_OPERAND (e, 0);
1118   tree imagexpr = TREE_OPERAND (e, 1);
1119
1120   /* Cast of an COMPLEX_TYPE expression to a different COMPLEX_TYPE.  */
1121   if (TREE_CODE (realexpr) == NOP_EXPR
1122       && TREE_CODE (imagexpr) == NOP_EXPR
1123       && TREE_TYPE (realexpr) == TREE_TYPE (type)
1124       && TREE_TYPE (imagexpr) == TREE_TYPE (type)
1125       && TREE_CODE (TREE_OPERAND (realexpr, 0)) == REALPART_EXPR
1126       && TREE_CODE (TREE_OPERAND (imagexpr, 0)) == IMAGPART_EXPR
1127       && TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0)
1128          == TREE_OPERAND (TREE_OPERAND (imagexpr, 0), 0))
1129     {
1130       pp_c_type_cast (pp, type);
1131       pp->expression (TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0));
1132       return;
1133     }
1134
1135   /* Cast of an scalar expression to COMPLEX_TYPE.  */
1136   if ((integer_zerop (imagexpr) || real_zerop (imagexpr))
1137       && TREE_TYPE (realexpr) == TREE_TYPE (type))
1138     {
1139       pp_c_type_cast (pp, type);
1140       if (TREE_CODE (realexpr) == NOP_EXPR)
1141         realexpr = TREE_OPERAND (realexpr, 0);
1142       pp->expression (realexpr);
1143       return;
1144     }
1145
1146   pp_c_compound_literal (pp, e);
1147 }
1148
1149 /* constant:
1150       integer-constant
1151       floating-constant
1152       fixed-point-constant
1153       enumeration-constant
1154       character-constant   */
1155
1156 void
1157 c_pretty_printer::constant (tree e)
1158 {
1159   const enum tree_code code = TREE_CODE (e);
1160
1161   switch (code)
1162     {
1163     case VOID_CST:
1164       pp_c_void_constant (this);
1165       break;
1166
1167     case INTEGER_CST:
1168       {
1169         tree type = TREE_TYPE (e);
1170         if (type == boolean_type_node)
1171           pp_c_bool_constant (this, e);
1172         else if (type == char_type_node)
1173           pp_c_character_constant (this, e);
1174         else if (TREE_CODE (type) == ENUMERAL_TYPE
1175                  && pp_c_enumeration_constant (this, e))
1176           ;
1177         else
1178           pp_c_integer_constant (this, e);
1179       }
1180       break;
1181
1182     case REAL_CST:
1183       pp_c_floating_constant (this, e);
1184       break;
1185
1186     case FIXED_CST:
1187       pp_c_fixed_constant (this, e);
1188       break;
1189
1190     case STRING_CST:
1191       pp_c_string_literal (this, e);
1192       break;
1193
1194     case COMPLEX_CST:
1195       /* Sometimes, we are confused and we think a complex literal
1196          is a constant.  Such thing is a compound literal which
1197          grammatically belongs to postfix-expr production.  */
1198       pp_c_compound_literal (this, e);
1199       break;
1200
1201     default:
1202       pp_unsupported_tree (this, e);
1203       break;
1204     }
1205 }
1206
1207 /* Pretty-print a string such as an identifier, without changing its
1208    encoding, preceded by whitespace is necessary.  */
1209
1210 void
1211 pp_c_ws_string (c_pretty_printer *pp, const char *str)
1212 {
1213   pp_c_maybe_whitespace (pp);
1214   pp_string (pp, str);
1215   pp->padding = pp_before;
1216 }
1217
1218 void
1219 c_pretty_printer::translate_string (const char *gmsgid)
1220 {
1221   if (pp_translate_identifiers (this))
1222     pp_c_ws_string (this, _(gmsgid));
1223   else
1224     pp_c_ws_string (this, gmsgid);
1225 }
1226
1227 /* Pretty-print an IDENTIFIER_NODE, which may contain UTF-8 sequences
1228    that need converting to the locale encoding, preceded by whitespace
1229    is necessary.  */
1230
1231 void
1232 pp_c_identifier (c_pretty_printer *pp, const char *id)
1233 {
1234   pp_c_maybe_whitespace (pp);
1235   pp_identifier (pp, id);
1236   pp->padding = pp_before;
1237 }
1238
1239 /* Pretty-print a C primary-expression.
1240    primary-expression:
1241       identifier
1242       constant
1243       string-literal
1244       ( expression )   */
1245
1246 void
1247 c_pretty_printer::primary_expression (tree e)
1248 {
1249   switch (TREE_CODE (e))
1250     {
1251     case VAR_DECL:
1252     case PARM_DECL:
1253     case FIELD_DECL:
1254     case CONST_DECL:
1255     case FUNCTION_DECL:
1256     case LABEL_DECL:
1257       pp_c_tree_decl_identifier (this, e);
1258       break;
1259
1260     case IDENTIFIER_NODE:
1261       pp_c_tree_identifier (this, e);
1262       break;
1263
1264     case ERROR_MARK:
1265       translate_string ("<erroneous-expression>");
1266       break;
1267
1268     case RESULT_DECL:
1269       translate_string ("<return-value>");
1270       break;
1271
1272     case VOID_CST:
1273     case INTEGER_CST:
1274     case REAL_CST:
1275     case FIXED_CST:
1276     case STRING_CST:
1277       constant (e);
1278       break;
1279
1280     case TARGET_EXPR:
1281       pp_c_ws_string (this, "__builtin_memcpy");
1282       pp_c_left_paren (this);
1283       pp_ampersand (this);
1284       primary_expression (TREE_OPERAND (e, 0));
1285       pp_separate_with (this, ',');
1286       pp_ampersand (this);
1287       initializer (TREE_OPERAND (e, 1));
1288       if (TREE_OPERAND (e, 2))
1289         {
1290           pp_separate_with (this, ',');
1291           expression (TREE_OPERAND (e, 2));
1292         }
1293       pp_c_right_paren (this);
1294       break;
1295
1296     default:
1297       /* FIXME:  Make sure we won't get into an infinite loop.  */
1298       pp_c_left_paren (this);
1299       expression (e);
1300       pp_c_right_paren (this);
1301       break;
1302     }
1303 }
1304
1305 /* Print out a C initializer -- also support C compound-literals.
1306    initializer:
1307       assignment-expression:
1308       { initializer-list }
1309       { initializer-list , }   */
1310
1311 void
1312 c_pretty_printer::initializer (tree e)
1313 {
1314   if (TREE_CODE (e) == CONSTRUCTOR)
1315     pp_c_brace_enclosed_initializer_list (this, e);
1316   else
1317     expression (e);
1318 }
1319
1320 /* init-declarator:
1321       declarator:
1322       declarator = initializer   */
1323
1324 void
1325 pp_c_init_declarator (c_pretty_printer *pp, tree t)
1326 {
1327   pp->declarator (t);
1328   /* We don't want to output function definitions here.  There are handled
1329      elsewhere (and the syntactic form is bogus anyway).  */
1330   if (TREE_CODE (t) != FUNCTION_DECL && DECL_INITIAL (t))
1331     {
1332       tree init = DECL_INITIAL (t);
1333       /* This C++ bit is handled here because it is easier to do so.
1334          In templates, the C++ parser builds a TREE_LIST for a
1335          direct-initialization; the TREE_PURPOSE is the variable to
1336          initialize and the TREE_VALUE is the initializer.  */
1337       if (TREE_CODE (init) == TREE_LIST)
1338         {
1339           pp_c_left_paren (pp);
1340           pp->expression (TREE_VALUE (init));
1341           pp_right_paren (pp);
1342         }
1343       else
1344         {
1345           pp_space (pp);
1346           pp_equal (pp);
1347           pp_space (pp);
1348           pp->initializer (init);
1349         }
1350     }
1351 }
1352
1353 /* initializer-list:
1354       designation(opt) initializer
1355       initializer-list , designation(opt) initializer
1356
1357    designation:
1358       designator-list =
1359
1360    designator-list:
1361       designator
1362       designator-list designator
1363
1364    designator:
1365       [ constant-expression ]
1366       identifier   */
1367
1368 static void
1369 pp_c_initializer_list (c_pretty_printer *pp, tree e)
1370 {
1371   tree type = TREE_TYPE (e);
1372   const enum tree_code code = TREE_CODE (type);
1373
1374   if (TREE_CODE (e) == CONSTRUCTOR)
1375     {
1376       pp_c_constructor_elts (pp, CONSTRUCTOR_ELTS (e));
1377       return;
1378     }
1379
1380   switch (code)
1381     {
1382     case RECORD_TYPE:
1383     case UNION_TYPE:
1384     case ARRAY_TYPE:
1385       {
1386         tree init = TREE_OPERAND (e, 0);
1387         for (; init != NULL_TREE; init = TREE_CHAIN (init))
1388           {
1389             if (code == RECORD_TYPE || code == UNION_TYPE)
1390               {
1391                 pp_c_dot (pp);
1392                 pp->primary_expression (TREE_PURPOSE (init));
1393               }
1394             else
1395               {
1396                 pp_c_left_bracket (pp);
1397                 if (TREE_PURPOSE (init))
1398                   pp->constant (TREE_PURPOSE (init));
1399                 pp_c_right_bracket (pp);
1400               }
1401             pp_c_whitespace (pp);
1402             pp_equal (pp);
1403             pp_c_whitespace (pp);
1404             pp->initializer (TREE_VALUE (init));
1405             if (TREE_CHAIN (init))
1406               pp_separate_with (pp, ',');
1407           }
1408       }
1409       return;
1410
1411     case VECTOR_TYPE:
1412       if (TREE_CODE (e) == VECTOR_CST)
1413         {
1414           unsigned i;
1415           for (i = 0; i < VECTOR_CST_NELTS (e); ++i)
1416             {
1417               if (i > 0)
1418                 pp_separate_with (pp, ',');
1419               pp->expression (VECTOR_CST_ELT (e, i));
1420             }
1421         }
1422       else
1423         break;
1424       return;
1425
1426     case COMPLEX_TYPE:
1427       if (TREE_CODE (e) == COMPLEX_CST || TREE_CODE (e) == COMPLEX_EXPR)
1428         {
1429           const bool cst = TREE_CODE (e) == COMPLEX_CST;
1430           pp->expression (cst ? TREE_REALPART (e) : TREE_OPERAND (e, 0));
1431           pp_separate_with (pp, ',');
1432           pp->expression (cst ? TREE_IMAGPART (e) : TREE_OPERAND (e, 1));
1433         }
1434       else
1435         break;
1436       return;
1437
1438     default:
1439       break;
1440     }
1441
1442   pp_unsupported_tree (pp, type);
1443 }
1444
1445 /* Pretty-print a brace-enclosed initializer-list.  */
1446
1447 static void
1448 pp_c_brace_enclosed_initializer_list (c_pretty_printer *pp, tree l)
1449 {
1450   pp_c_left_brace (pp);
1451   pp_c_initializer_list (pp, l);
1452   pp_c_right_brace (pp);
1453 }
1454
1455
1456 /*  This is a convenient function, used to bridge gap between C and C++
1457     grammars.
1458
1459     id-expression:
1460        identifier  */
1461
1462 void
1463 c_pretty_printer::id_expression (tree t)
1464 {
1465   switch (TREE_CODE (t))
1466     {
1467     case VAR_DECL:
1468     case PARM_DECL:
1469     case CONST_DECL:
1470     case TYPE_DECL:
1471     case FUNCTION_DECL:
1472     case FIELD_DECL:
1473     case LABEL_DECL:
1474       pp_c_tree_decl_identifier (this, t);
1475       break;
1476
1477     case IDENTIFIER_NODE:
1478       pp_c_tree_identifier (this, t);
1479       break;
1480
1481     default:
1482       pp_unsupported_tree (this, t);
1483       break;
1484     }
1485 }
1486
1487 /* postfix-expression:
1488       primary-expression
1489       postfix-expression [ expression ]
1490       postfix-expression ( argument-expression-list(opt) )
1491       postfix-expression . identifier
1492       postfix-expression -> identifier
1493       postfix-expression ++
1494       postfix-expression --
1495       ( type-name ) { initializer-list }
1496       ( type-name ) { initializer-list , }  */
1497
1498 void
1499 c_pretty_printer::postfix_expression (tree e)
1500 {
1501   enum tree_code code = TREE_CODE (e);
1502   switch (code)
1503     {
1504     case POSTINCREMENT_EXPR:
1505     case POSTDECREMENT_EXPR:
1506       postfix_expression (TREE_OPERAND (e, 0));
1507       pp_string (this, code == POSTINCREMENT_EXPR ? "++" : "--");
1508       break;
1509
1510     case ARRAY_REF:
1511       postfix_expression (TREE_OPERAND (e, 0));
1512       pp_c_left_bracket (this);
1513       expression (TREE_OPERAND (e, 1));
1514       pp_c_right_bracket (this);
1515       break;
1516
1517     case ARRAY_NOTATION_REF:
1518       postfix_expression (ARRAY_NOTATION_ARRAY (e));
1519       pp_c_left_bracket (this);
1520       expression (ARRAY_NOTATION_START (e));
1521       pp_colon (this);
1522       expression (ARRAY_NOTATION_LENGTH (e));
1523       pp_colon (this);
1524       expression (ARRAY_NOTATION_STRIDE (e));
1525       pp_c_right_bracket (this);
1526       break;
1527
1528     case CALL_EXPR:
1529       {
1530         call_expr_arg_iterator iter;
1531         tree arg;
1532         postfix_expression (CALL_EXPR_FN (e));
1533         pp_c_left_paren (this);
1534         FOR_EACH_CALL_EXPR_ARG (arg, iter, e)
1535           {
1536             expression (arg);
1537             if (more_call_expr_args_p (&iter))
1538               pp_separate_with (this, ',');
1539           }
1540         pp_c_right_paren (this);
1541         break;
1542       }
1543
1544     case UNORDERED_EXPR:
1545       pp_c_ws_string (this, flag_isoc99
1546                            ? "isunordered"
1547                            : "__builtin_isunordered");
1548       goto two_args_fun;
1549
1550     case ORDERED_EXPR:
1551       pp_c_ws_string (this, flag_isoc99
1552                            ? "!isunordered"
1553                            : "!__builtin_isunordered");
1554       goto two_args_fun;
1555
1556     case UNLT_EXPR:
1557       pp_c_ws_string (this, flag_isoc99
1558                            ? "!isgreaterequal"
1559                            : "!__builtin_isgreaterequal");
1560       goto two_args_fun;
1561
1562     case UNLE_EXPR:
1563       pp_c_ws_string (this, flag_isoc99
1564                            ? "!isgreater"
1565                            : "!__builtin_isgreater");
1566       goto two_args_fun;
1567
1568     case UNGT_EXPR:
1569       pp_c_ws_string (this, flag_isoc99
1570                            ? "!islessequal"
1571                            : "!__builtin_islessequal");
1572       goto two_args_fun;
1573
1574     case UNGE_EXPR:
1575       pp_c_ws_string (this, flag_isoc99
1576                            ? "!isless"
1577                            : "!__builtin_isless");
1578       goto two_args_fun;
1579
1580     case UNEQ_EXPR:
1581       pp_c_ws_string (this, flag_isoc99
1582                            ? "!islessgreater"
1583                            : "!__builtin_islessgreater");
1584       goto two_args_fun;
1585
1586     case LTGT_EXPR:
1587       pp_c_ws_string (this, flag_isoc99
1588                            ? "islessgreater"
1589                            : "__builtin_islessgreater");
1590       goto two_args_fun;
1591
1592     two_args_fun:
1593       pp_c_left_paren (this);
1594       expression (TREE_OPERAND (e, 0));
1595       pp_separate_with (this, ',');
1596       expression (TREE_OPERAND (e, 1));
1597       pp_c_right_paren (this);
1598       break;
1599
1600     case ABS_EXPR:
1601       pp_c_ws_string (this, "__builtin_abs");
1602       pp_c_left_paren (this);
1603       expression (TREE_OPERAND (e, 0));
1604       pp_c_right_paren (this);
1605       break;
1606
1607     case COMPONENT_REF:
1608       {
1609         tree object = TREE_OPERAND (e, 0);
1610         if (TREE_CODE (object) == INDIRECT_REF)
1611           {
1612             postfix_expression (TREE_OPERAND (object, 0));
1613             pp_c_arrow (this);
1614           }
1615         else
1616           {
1617             postfix_expression (object);
1618             pp_c_dot (this);
1619           }
1620         expression (TREE_OPERAND (e, 1));
1621       }
1622       break;
1623
1624     case BIT_FIELD_REF:
1625       {
1626         tree type = TREE_TYPE (e);
1627
1628         type = signed_or_unsigned_type_for (TYPE_UNSIGNED (type), type);
1629         if (type
1630             && tree_int_cst_equal (TYPE_SIZE (type), TREE_OPERAND (e, 1)))
1631           {
1632             HOST_WIDE_INT bitpos = tree_to_shwi (TREE_OPERAND (e, 2));
1633             HOST_WIDE_INT size = tree_to_shwi (TYPE_SIZE (type));
1634             if ((bitpos % size) == 0)
1635               {
1636                 pp_c_left_paren (this);
1637                 pp_c_left_paren (this);
1638                 type_id (type);
1639                 pp_c_star (this);
1640                 pp_c_right_paren (this);
1641                 pp_c_ampersand (this);
1642                 expression (TREE_OPERAND (e, 0));
1643                 pp_c_right_paren (this);
1644                 pp_c_left_bracket (this);
1645                 pp_wide_integer (this, bitpos / size);
1646                 pp_c_right_bracket (this);
1647                 break;
1648               }
1649           }
1650         pp_unsupported_tree (this, e);
1651       }
1652       break;
1653
1654     case MEM_REF:
1655       expression (e);
1656       break;
1657
1658     case COMPLEX_CST:
1659     case VECTOR_CST:
1660       pp_c_compound_literal (this, e);
1661       break;
1662
1663     case COMPLEX_EXPR:
1664       pp_c_complex_expr (this, e);
1665       break;
1666
1667     case COMPOUND_LITERAL_EXPR:
1668       e = DECL_INITIAL (COMPOUND_LITERAL_EXPR_DECL (e));
1669       /* Fall through.  */
1670     case CONSTRUCTOR:
1671       initializer (e);
1672       break;
1673
1674     case VA_ARG_EXPR:
1675       pp_c_ws_string (this, "__builtin_va_arg");
1676       pp_c_left_paren (this);
1677       assignment_expression (TREE_OPERAND (e, 0));
1678       pp_separate_with (this, ',');
1679       type_id (TREE_TYPE (e));
1680       pp_c_right_paren (this);
1681       break;
1682
1683     case ADDR_EXPR:
1684       if (TREE_CODE (TREE_OPERAND (e, 0)) == FUNCTION_DECL)
1685         {
1686           id_expression (TREE_OPERAND (e, 0));
1687           break;
1688         }
1689       /* else fall through.  */
1690
1691     default:
1692       primary_expression (e);
1693       break;
1694     }
1695 }
1696
1697 /* Print out an expression-list; E is expected to be a TREE_LIST.  */
1698
1699 void
1700 pp_c_expression_list (c_pretty_printer *pp, tree e)
1701 {
1702   for (; e != NULL_TREE; e = TREE_CHAIN (e))
1703     {
1704       pp->expression (TREE_VALUE (e));
1705       if (TREE_CHAIN (e))
1706         pp_separate_with (pp, ',');
1707     }
1708 }
1709
1710 /* Print out V, which contains the elements of a constructor.  */
1711
1712 void
1713 pp_c_constructor_elts (c_pretty_printer *pp, vec<constructor_elt, va_gc> *v)
1714 {
1715   unsigned HOST_WIDE_INT ix;
1716   tree value;
1717
1718   FOR_EACH_CONSTRUCTOR_VALUE (v, ix, value)
1719     {
1720       pp->expression (value);
1721       if (ix != vec_safe_length (v) - 1)
1722         pp_separate_with (pp, ',');
1723     }
1724 }
1725
1726 /* Print out an expression-list in parens, as if it were the argument
1727    list to a function.  */
1728
1729 void
1730 pp_c_call_argument_list (c_pretty_printer *pp, tree t)
1731 {
1732   pp_c_left_paren (pp);
1733   if (t && TREE_CODE (t) == TREE_LIST)
1734     pp_c_expression_list (pp, t);
1735   pp_c_right_paren (pp);
1736 }
1737
1738 /* unary-expression:
1739       postfix-expression
1740       ++ cast-expression
1741       -- cast-expression
1742       unary-operator cast-expression
1743       sizeof unary-expression
1744       sizeof ( type-id )
1745
1746   unary-operator: one of
1747       * &  + - ! ~
1748
1749    GNU extensions.
1750    unary-expression:
1751       __alignof__ unary-expression
1752       __alignof__ ( type-id )
1753       __real__ unary-expression
1754       __imag__ unary-expression  */
1755
1756 void
1757 c_pretty_printer::unary_expression (tree e)
1758 {
1759   enum tree_code code = TREE_CODE (e);
1760   switch (code)
1761     {
1762     case PREINCREMENT_EXPR:
1763     case PREDECREMENT_EXPR:
1764       pp_string (this, code == PREINCREMENT_EXPR ? "++" : "--");
1765       unary_expression (TREE_OPERAND (e, 0));
1766       break;
1767
1768     case ADDR_EXPR:
1769     case INDIRECT_REF:
1770     case NEGATE_EXPR:
1771     case BIT_NOT_EXPR:
1772     case TRUTH_NOT_EXPR:
1773     case CONJ_EXPR:
1774       /* String literal are used by address.  */
1775       if (code == ADDR_EXPR && TREE_CODE (TREE_OPERAND (e, 0)) != STRING_CST)
1776         pp_ampersand (this);
1777       else if (code == INDIRECT_REF)
1778         pp_c_star (this);
1779       else if (code == NEGATE_EXPR)
1780         pp_minus (this);
1781       else if (code == BIT_NOT_EXPR || code == CONJ_EXPR)
1782         pp_complement (this);
1783       else if (code == TRUTH_NOT_EXPR)
1784         pp_exclamation (this);
1785       pp_c_cast_expression (this, TREE_OPERAND (e, 0));
1786       break;
1787
1788     case MEM_REF:
1789       if (TREE_CODE (TREE_OPERAND (e, 0)) == ADDR_EXPR
1790           && integer_zerop (TREE_OPERAND (e, 1)))
1791         expression (TREE_OPERAND (TREE_OPERAND (e, 0), 0));
1792       else
1793         {
1794           pp_c_star (this);
1795           if (!integer_zerop (TREE_OPERAND (e, 1)))
1796             {
1797               pp_c_left_paren (this);
1798               if (!integer_onep (TYPE_SIZE_UNIT
1799                                  (TREE_TYPE (TREE_TYPE (TREE_OPERAND (e, 0))))))
1800                 pp_c_type_cast (this, ptr_type_node);
1801             }
1802           pp_c_cast_expression (this, TREE_OPERAND (e, 0));
1803           if (!integer_zerop (TREE_OPERAND (e, 1)))
1804             {
1805               pp_plus (this);
1806               pp_c_integer_constant (this,
1807                                      fold_convert (ssizetype,
1808                                                    TREE_OPERAND (e, 1)));
1809               pp_c_right_paren (this);
1810             }
1811         }
1812       break;
1813
1814     case REALPART_EXPR:
1815     case IMAGPART_EXPR:
1816       pp_c_ws_string (this, code == REALPART_EXPR ? "__real__" : "__imag__");
1817       pp_c_whitespace (this);
1818       unary_expression (TREE_OPERAND (e, 0));
1819       break;
1820
1821     default:
1822       postfix_expression (e);
1823       break;
1824     }
1825 }
1826
1827 /* cast-expression:
1828       unary-expression
1829       ( type-name ) cast-expression  */
1830
1831 void
1832 pp_c_cast_expression (c_pretty_printer *pp, tree e)
1833 {
1834   switch (TREE_CODE (e))
1835     {
1836     case FLOAT_EXPR:
1837     case FIX_TRUNC_EXPR:
1838     CASE_CONVERT:
1839     case VIEW_CONVERT_EXPR:
1840       pp_c_type_cast (pp, TREE_TYPE (e));
1841       pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
1842       break;
1843
1844     default:
1845       pp->unary_expression (e);
1846     }
1847 }
1848
1849 /* multiplicative-expression:
1850       cast-expression
1851       multiplicative-expression * cast-expression
1852       multiplicative-expression / cast-expression
1853       multiplicative-expression % cast-expression   */
1854
1855 void
1856 c_pretty_printer::multiplicative_expression (tree e)
1857 {
1858   enum tree_code code = TREE_CODE (e);
1859   switch (code)
1860     {
1861     case MULT_EXPR:
1862     case TRUNC_DIV_EXPR:
1863     case TRUNC_MOD_EXPR:
1864       multiplicative_expression (TREE_OPERAND (e, 0));
1865       pp_c_whitespace (this);
1866       if (code == MULT_EXPR)
1867         pp_c_star (this);
1868       else if (code == TRUNC_DIV_EXPR)
1869         pp_slash (this);
1870       else
1871         pp_modulo (this);
1872       pp_c_whitespace (this);
1873       pp_c_cast_expression (this, TREE_OPERAND (e, 1));
1874       break;
1875
1876     default:
1877       pp_c_cast_expression (this, e);
1878       break;
1879     }
1880 }
1881
1882 /* additive-expression:
1883       multiplicative-expression
1884       additive-expression + multiplicative-expression
1885       additive-expression - multiplicative-expression   */
1886
1887 static void
1888 pp_c_additive_expression (c_pretty_printer *pp, tree e)
1889 {
1890   enum tree_code code = TREE_CODE (e);
1891   switch (code)
1892     {
1893     case POINTER_PLUS_EXPR:
1894     case PLUS_EXPR:
1895     case MINUS_EXPR:
1896       pp_c_additive_expression (pp, TREE_OPERAND (e, 0));
1897       pp_c_whitespace (pp);
1898       if (code == PLUS_EXPR || code == POINTER_PLUS_EXPR)
1899         pp_plus (pp);
1900       else
1901         pp_minus (pp);
1902       pp_c_whitespace (pp);
1903       pp->multiplicative_expression (TREE_OPERAND (e, 1));
1904       break;
1905
1906     default:
1907       pp->multiplicative_expression (e);
1908       break;
1909     }
1910 }
1911
1912 /* additive-expression:
1913       additive-expression
1914       shift-expression << additive-expression
1915       shift-expression >> additive-expression   */
1916
1917 static void
1918 pp_c_shift_expression (c_pretty_printer *pp, tree e)
1919 {
1920   enum tree_code code = TREE_CODE (e);
1921   switch (code)
1922     {
1923     case LSHIFT_EXPR:
1924     case RSHIFT_EXPR:
1925       pp_c_shift_expression (pp, TREE_OPERAND (e, 0));
1926       pp_c_whitespace (pp);
1927       pp_string (pp, code == LSHIFT_EXPR ? "<<" : ">>");
1928       pp_c_whitespace (pp);
1929       pp_c_additive_expression (pp, TREE_OPERAND (e, 1));
1930       break;
1931
1932     default:
1933       pp_c_additive_expression (pp, e);
1934     }
1935 }
1936
1937 /* relational-expression:
1938       shift-expression
1939       relational-expression < shift-expression
1940       relational-expression > shift-expression
1941       relational-expression <= shift-expression
1942       relational-expression >= shift-expression   */
1943
1944 static void
1945 pp_c_relational_expression (c_pretty_printer *pp, tree e)
1946 {
1947   enum tree_code code = TREE_CODE (e);
1948   switch (code)
1949     {
1950     case LT_EXPR:
1951     case GT_EXPR:
1952     case LE_EXPR:
1953     case GE_EXPR:
1954       pp_c_relational_expression (pp, TREE_OPERAND (e, 0));
1955       pp_c_whitespace (pp);
1956       if (code == LT_EXPR)
1957         pp_less (pp);
1958       else if (code == GT_EXPR)
1959         pp_greater (pp);
1960       else if (code == LE_EXPR)
1961         pp_less_equal (pp);
1962       else if (code == GE_EXPR)
1963         pp_greater_equal (pp);
1964       pp_c_whitespace (pp);
1965       pp_c_shift_expression (pp, TREE_OPERAND (e, 1));
1966       break;
1967
1968     default:
1969       pp_c_shift_expression (pp, e);
1970       break;
1971     }
1972 }
1973
1974 /* equality-expression:
1975       relational-expression
1976       equality-expression == relational-expression
1977       equality-equality != relational-expression  */
1978
1979 static void
1980 pp_c_equality_expression (c_pretty_printer *pp, tree e)
1981 {
1982   enum tree_code code = TREE_CODE (e);
1983   switch (code)
1984     {
1985     case EQ_EXPR:
1986     case NE_EXPR:
1987       pp_c_equality_expression (pp, TREE_OPERAND (e, 0));
1988       pp_c_whitespace (pp);
1989       pp_string (pp, code == EQ_EXPR ? "==" : "!=");
1990       pp_c_whitespace (pp);
1991       pp_c_relational_expression (pp, TREE_OPERAND (e, 1));
1992       break;
1993
1994     default:
1995       pp_c_relational_expression (pp, e);
1996       break;
1997     }
1998 }
1999
2000 /* AND-expression:
2001       equality-expression
2002       AND-expression & equality-equality   */
2003
2004 static void
2005 pp_c_and_expression (c_pretty_printer *pp, tree e)
2006 {
2007   if (TREE_CODE (e) == BIT_AND_EXPR)
2008     {
2009       pp_c_and_expression (pp, TREE_OPERAND (e, 0));
2010       pp_c_whitespace (pp);
2011       pp_ampersand (pp);
2012       pp_c_whitespace (pp);
2013       pp_c_equality_expression (pp, TREE_OPERAND (e, 1));
2014     }
2015   else
2016     pp_c_equality_expression (pp, e);
2017 }
2018
2019 /* exclusive-OR-expression:
2020      AND-expression
2021      exclusive-OR-expression ^ AND-expression  */
2022
2023 static void
2024 pp_c_exclusive_or_expression (c_pretty_printer *pp, tree e)
2025 {
2026   if (TREE_CODE (e) == BIT_XOR_EXPR
2027       || TREE_CODE (e) == TRUTH_XOR_EXPR)
2028     {
2029       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
2030       if (TREE_CODE (e) == BIT_XOR_EXPR)
2031         pp_c_maybe_whitespace (pp);
2032       else
2033         pp_c_whitespace (pp);
2034       pp_carret (pp);
2035       pp_c_whitespace (pp);
2036       pp_c_and_expression (pp, TREE_OPERAND (e, 1));
2037     }
2038   else
2039     pp_c_and_expression (pp, e);
2040 }
2041
2042 /* inclusive-OR-expression:
2043      exclusive-OR-expression
2044      inclusive-OR-expression | exclusive-OR-expression  */
2045
2046 static void
2047 pp_c_inclusive_or_expression (c_pretty_printer *pp, tree e)
2048 {
2049   if (TREE_CODE (e) == BIT_IOR_EXPR)
2050     {
2051       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
2052       pp_c_whitespace (pp);
2053       pp_bar (pp);
2054       pp_c_whitespace (pp);
2055       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 1));
2056     }
2057   else
2058     pp_c_exclusive_or_expression (pp, e);
2059 }
2060
2061 /* logical-AND-expression:
2062       inclusive-OR-expression
2063       logical-AND-expression && inclusive-OR-expression  */
2064
2065 static void
2066 pp_c_logical_and_expression (c_pretty_printer *pp, tree e)
2067 {
2068   if (TREE_CODE (e) == TRUTH_ANDIF_EXPR
2069       || TREE_CODE (e) == TRUTH_AND_EXPR)
2070     {
2071       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 0));
2072       pp_c_whitespace (pp);
2073       pp_ampersand_ampersand (pp);
2074       pp_c_whitespace (pp);
2075       pp_c_inclusive_or_expression (pp, TREE_OPERAND (e, 1));
2076     }
2077   else
2078     pp_c_inclusive_or_expression (pp, e);
2079 }
2080
2081 /* logical-OR-expression:
2082       logical-AND-expression
2083       logical-OR-expression || logical-AND-expression  */
2084
2085 void
2086 pp_c_logical_or_expression (c_pretty_printer *pp, tree e)
2087 {
2088   if (TREE_CODE (e) == TRUTH_ORIF_EXPR
2089       || TREE_CODE (e) == TRUTH_OR_EXPR)
2090     {
2091       pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0));
2092       pp_c_whitespace (pp);
2093       pp_bar_bar (pp);
2094       pp_c_whitespace (pp);
2095       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 1));
2096     }
2097   else
2098     pp_c_logical_and_expression (pp, e);
2099 }
2100
2101 /* conditional-expression:
2102       logical-OR-expression
2103       logical-OR-expression ? expression : conditional-expression  */
2104
2105 void
2106 c_pretty_printer::conditional_expression (tree e)
2107 {
2108   if (TREE_CODE (e) == COND_EXPR)
2109     {
2110       pp_c_logical_or_expression (this, TREE_OPERAND (e, 0));
2111       pp_c_whitespace (this);
2112       pp_question (this);
2113       pp_c_whitespace (this);
2114       expression (TREE_OPERAND (e, 1));
2115       pp_c_whitespace (this);
2116       pp_colon (this);
2117       pp_c_whitespace (this);
2118       conditional_expression (TREE_OPERAND (e, 2));
2119     }
2120   else
2121     pp_c_logical_or_expression (this, e);
2122 }
2123
2124
2125 /* assignment-expression:
2126       conditional-expression
2127       unary-expression assignment-operator  assignment-expression
2128
2129    assignment-expression: one of
2130       =    *=    /=    %=    +=    -=    >>=    <<=    &=    ^=    |=  */
2131
2132 void
2133 c_pretty_printer::assignment_expression (tree e)
2134 {
2135   if (TREE_CODE (e) == MODIFY_EXPR
2136       || TREE_CODE (e) == INIT_EXPR)
2137     {
2138       unary_expression (TREE_OPERAND (e, 0));
2139       pp_c_whitespace (this);
2140       pp_equal (this);
2141       pp_space (this);
2142       expression (TREE_OPERAND (e, 1));
2143     }
2144   else
2145     conditional_expression (e);
2146 }
2147
2148 /* expression:
2149        assignment-expression
2150        expression , assignment-expression
2151
2152   Implementation note:  instead of going through the usual recursion
2153   chain, I take the liberty of dispatching nodes to the appropriate
2154   functions.  This makes some redundancy, but it worths it. That also
2155   prevents a possible infinite recursion between primary_expression ()
2156   and expression ().  */
2157
2158 void
2159 c_pretty_printer::expression (tree e)
2160 {
2161   switch (TREE_CODE (e))
2162     {
2163     case VOID_CST:
2164       pp_c_void_constant (this);
2165       break;
2166
2167     case INTEGER_CST:
2168       pp_c_integer_constant (this, e);
2169       break;
2170
2171     case REAL_CST:
2172       pp_c_floating_constant (this, e);
2173       break;
2174
2175     case FIXED_CST:
2176       pp_c_fixed_constant (this, e);
2177       break;
2178
2179     case STRING_CST:
2180       pp_c_string_literal (this, e);
2181       break;
2182
2183     case IDENTIFIER_NODE:
2184     case FUNCTION_DECL:
2185     case VAR_DECL:
2186     case CONST_DECL:
2187     case PARM_DECL:
2188     case RESULT_DECL:
2189     case FIELD_DECL:
2190     case LABEL_DECL:
2191     case ERROR_MARK:
2192       primary_expression (e);
2193       break;
2194
2195     case SSA_NAME:
2196       if (SSA_NAME_VAR (e)
2197           && !DECL_ARTIFICIAL (SSA_NAME_VAR (e)))
2198         expression (SSA_NAME_VAR (e));
2199       else
2200         translate_string ("<unknown>");
2201       break;
2202
2203     case POSTINCREMENT_EXPR:
2204     case POSTDECREMENT_EXPR:
2205     case ARRAY_REF:
2206     case ARRAY_NOTATION_REF:
2207     case CALL_EXPR:
2208     case COMPONENT_REF:
2209     case BIT_FIELD_REF:
2210     case COMPLEX_CST:
2211     case COMPLEX_EXPR:
2212     case VECTOR_CST:
2213     case ORDERED_EXPR:
2214     case UNORDERED_EXPR:
2215     case LTGT_EXPR:
2216     case UNEQ_EXPR:
2217     case UNLE_EXPR:
2218     case UNLT_EXPR:
2219     case UNGE_EXPR:
2220     case UNGT_EXPR:
2221     case ABS_EXPR:
2222     case CONSTRUCTOR:
2223     case COMPOUND_LITERAL_EXPR:
2224     case VA_ARG_EXPR:
2225       postfix_expression (e);
2226       break;
2227
2228     case CONJ_EXPR:
2229     case ADDR_EXPR:
2230     case INDIRECT_REF:
2231     case MEM_REF:
2232     case NEGATE_EXPR:
2233     case BIT_NOT_EXPR:
2234     case TRUTH_NOT_EXPR:
2235     case PREINCREMENT_EXPR:
2236     case PREDECREMENT_EXPR:
2237     case REALPART_EXPR:
2238     case IMAGPART_EXPR:
2239       unary_expression (e);
2240       break;
2241
2242     case FLOAT_EXPR:
2243     case FIX_TRUNC_EXPR:
2244     CASE_CONVERT:
2245     case VIEW_CONVERT_EXPR:
2246       pp_c_cast_expression (this, e);
2247       break;
2248
2249     case MULT_EXPR:
2250     case TRUNC_MOD_EXPR:
2251     case TRUNC_DIV_EXPR:
2252       multiplicative_expression (e);
2253       break;
2254
2255     case LSHIFT_EXPR:
2256     case RSHIFT_EXPR:
2257       pp_c_shift_expression (this, e);
2258       break;
2259
2260     case LT_EXPR:
2261     case GT_EXPR:
2262     case LE_EXPR:
2263     case GE_EXPR:
2264       pp_c_relational_expression (this, e);
2265       break;
2266
2267     case BIT_AND_EXPR:
2268       pp_c_and_expression (this, e);
2269       break;
2270
2271     case BIT_XOR_EXPR:
2272     case TRUTH_XOR_EXPR:
2273       pp_c_exclusive_or_expression (this, e);
2274       break;
2275
2276     case BIT_IOR_EXPR:
2277       pp_c_inclusive_or_expression (this, e);
2278       break;
2279
2280     case TRUTH_ANDIF_EXPR:
2281     case TRUTH_AND_EXPR:
2282       pp_c_logical_and_expression (this, e);
2283       break;
2284
2285     case TRUTH_ORIF_EXPR:
2286     case TRUTH_OR_EXPR:
2287       pp_c_logical_or_expression (this, e);
2288       break;
2289
2290     case EQ_EXPR:
2291     case NE_EXPR:
2292       pp_c_equality_expression (this, e);
2293       break;
2294
2295     case COND_EXPR:
2296       conditional_expression (e);
2297       break;
2298
2299     case POINTER_PLUS_EXPR:
2300     case PLUS_EXPR:
2301     case MINUS_EXPR:
2302       pp_c_additive_expression (this, e);
2303       break;
2304
2305     case MODIFY_EXPR:
2306     case INIT_EXPR:
2307       assignment_expression (e);
2308       break;
2309
2310     case COMPOUND_EXPR:
2311       pp_c_left_paren (this);
2312       expression (TREE_OPERAND (e, 0));
2313       pp_separate_with (this, ',');
2314       assignment_expression (TREE_OPERAND (e, 1));
2315       pp_c_right_paren (this);
2316       break;
2317
2318     case NON_LVALUE_EXPR:
2319     case SAVE_EXPR:
2320       expression (TREE_OPERAND (e, 0));
2321       break;
2322
2323     case TARGET_EXPR:
2324       postfix_expression (TREE_OPERAND (e, 1));
2325       break;
2326
2327     case BIND_EXPR:
2328     case GOTO_EXPR:
2329       /* We don't yet have a way of dumping statements in a
2330          human-readable format.  */
2331       pp_string (this, "({...})");
2332       break;
2333
2334     case C_MAYBE_CONST_EXPR:
2335       expression (C_MAYBE_CONST_EXPR_EXPR (e));
2336       break;
2337
2338     default:
2339       pp_unsupported_tree (this, e);
2340       break;
2341     }
2342 }
2343
2344
2345 \f
2346 /* Statements.  */
2347
2348 void
2349 c_pretty_printer::statement (tree stmt)
2350 {
2351   if (stmt == NULL)
2352     return;
2353
2354   if (pp_needs_newline (this))
2355     pp_newline_and_indent (this, 0);
2356
2357   dump_generic_node (this, stmt, pp_indentation (this), 0, true);
2358 }
2359
2360 \f
2361 /* Initialize the PRETTY-PRINTER for handling C codes.  */
2362
2363 c_pretty_printer::c_pretty_printer ()
2364   : pretty_printer (),
2365     offset_list (),
2366     flags ()
2367 {
2368   type_specifier_seq        = pp_c_specifier_qualifier_list;
2369   ptr_operator              = pp_c_pointer;
2370   parameter_list            = pp_c_parameter_type_list;
2371 }
2372
2373
2374 /* Print the tree T in full, on file FILE.  */
2375
2376 void
2377 print_c_tree (FILE *file, tree t)
2378 {
2379   c_pretty_printer pp;
2380
2381   pp_needs_newline (&pp) = true;
2382   pp.buffer->stream = file;
2383   pp.statement (t);
2384   pp_newline_and_flush (&pp);
2385 }
2386
2387 /* Print the tree T in full, on stderr.  */
2388
2389 DEBUG_FUNCTION void
2390 debug_c_tree (tree t)
2391 {
2392   print_c_tree (stderr, t);
2393   fputc ('\n', stderr);
2394 }
2395
2396 /* Output the DECL_NAME of T.  If T has no DECL_NAME, output a string made
2397    up of T's memory address.  */
2398
2399 void
2400 pp_c_tree_decl_identifier (c_pretty_printer *pp, tree t)
2401 {
2402   const char *name;
2403
2404   gcc_assert (DECL_P (t));
2405
2406   if (DECL_NAME (t))
2407     name = IDENTIFIER_POINTER (DECL_NAME (t));
2408   else
2409     {
2410       static char xname[8];
2411       sprintf (xname, "<U%4x>", ((unsigned)((uintptr_t)(t) & 0xffff)));
2412       name = xname;
2413     }
2414
2415   pp_c_identifier (pp, name);
2416 }