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

   1 /* Subroutines common to both C and C++ pretty-printers.
   2    Copyright (C) 2002-2018 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 "c-pretty-print.h"
  25 #include "diagnostic.h"
  26 #include "stor-layout.h"
  27 #include "stringpool.h"
  28 #include "attribs.h"
  29 #include "intl.h"
  30 #include "tree-pretty-print.h"
  31 #include "selftest.h"
  32
  33 /* The pretty-printer code is primarily designed to closely follow
  34    (GNU) C and C++ grammars.  That is to be contrasted with spaghetti
  35    codes we used to have in the past.  Following a structured
  36    approach (preferably the official grammars) is believed to make it
  37    much easier to add extensions and nifty pretty-printing effects that
  38    takes expression or declaration contexts into account.  */
  39
  40
  41 #define pp_c_maybe_whitespace(PP)            \
  42    do {                                      \
  43      if ((PP)->padding == pp_before) \
  44        pp_c_whitespace (PP);                 \
  45    } while (0)
  46
  47 /* literal  */
  48 static void pp_c_char (c_pretty_printer *, int);
  49
  50 /* postfix-expression  */
  51 static void pp_c_initializer_list (c_pretty_printer *, tree);
  52 static void pp_c_brace_enclosed_initializer_list (c_pretty_printer *, tree);
  53
  54 static void pp_c_additive_expression (c_pretty_printer *, tree);
  55 static void pp_c_shift_expression (c_pretty_printer *, tree);
  56 static void pp_c_relational_expression (c_pretty_printer *, tree);
  57 static void pp_c_equality_expression (c_pretty_printer *, tree);
  58 static void pp_c_and_expression (c_pretty_printer *, tree);
  59 static void pp_c_exclusive_or_expression (c_pretty_printer *, tree);
  60 static void pp_c_inclusive_or_expression (c_pretty_printer *, tree);
  61 static void pp_c_logical_and_expression (c_pretty_printer *, tree);
  62
  63 /* declarations.  */
  64
  65 \f
  66 /* Helper functions.  */
  67
  68 void
  69 pp_c_whitespace (c_pretty_printer *pp)
  70 {
  71   pp_space (pp);
  72   pp->padding = pp_none;
  73 }
  74
  75 void
  76 pp_c_left_paren (c_pretty_printer *pp)
  77 {
  78   pp_left_paren (pp);
  79   pp->padding = pp_none;
  80 }
  81
  82 void
  83 pp_c_right_paren (c_pretty_printer *pp)
  84 {
  85   pp_right_paren (pp);
  86   pp->padding = pp_none;
  87 }
  88
  89 void
  90 pp_c_left_brace (c_pretty_printer *pp)
  91 {
  92   pp_left_brace (pp);
  93   pp->padding = pp_none;
  94 }
  95
  96 void
  97 pp_c_right_brace (c_pretty_printer *pp)
  98 {
  99   pp_right_brace (pp);
 100   pp->padding = pp_none;
 101 }
 102
 103 void
 104 pp_c_left_bracket (c_pretty_printer *pp)
 105 {
 106   pp_left_bracket (pp);
 107   pp->padding = pp_none;
 108 }
 109
 110 void
 111 pp_c_right_bracket (c_pretty_printer *pp)
 112 {
 113   pp_right_bracket (pp);
 114   pp->padding = pp_none;
 115 }
 116
 117 void
 118 pp_c_dot (c_pretty_printer *pp)
 119 {
 120   pp_dot (pp);
 121   pp->padding = pp_none;
 122 }
 123
 124 void
 125 pp_c_ampersand (c_pretty_printer *pp)
 126 {
 127   pp_ampersand (pp);
 128   pp->padding = pp_none;
 129 }
 130
 131 void
 132 pp_c_star (c_pretty_printer *pp)
 133 {
 134   pp_star (pp);
 135   pp->padding = pp_none;
 136 }
 137
 138 void
 139 pp_c_arrow (c_pretty_printer *pp)
 140 {
 141   pp_arrow (pp);
 142   pp->padding = pp_none;
 143 }
 144
 145 void
 146 pp_c_semicolon (c_pretty_printer *pp)
 147 {
 148   pp_semicolon (pp);
 149   pp->padding = pp_none;
 150 }
 151
 152 void
 153 pp_c_complement (c_pretty_printer *pp)
 154 {
 155   pp_complement (pp);
 156   pp->padding = pp_none;
 157 }
 158
 159 void
 160 pp_c_exclamation (c_pretty_printer *pp)
 161 {
 162   pp_exclamation (pp);
 163   pp->padding = pp_none;
 164 }
 165
 166 /* Print out the external representation of QUALIFIERS.  */
 167
 168 void
 169 pp_c_cv_qualifiers (c_pretty_printer *pp, int qualifiers, bool func_type)
 170 {
 171   const char *p = pp_last_position_in_text (pp);
 172
 173   if (!qualifiers)
 174     return;
 175
 176   /* The C programming language does not have references, but it is much
 177      simpler to handle those here rather than going through the same
 178      logic in the C++ pretty-printer.  */
 179   if (p != NULL && (*p == '*' || *p == '&'))
 180     pp_c_whitespace (pp);
 181
 182   if (qualifiers & TYPE_QUAL_ATOMIC)
 183     pp_c_ws_string (pp, "_Atomic");
 184   if (qualifiers & TYPE_QUAL_CONST)
 185     pp_c_ws_string (pp, func_type ? "__attribute__((const))" : "const");
 186   if (qualifiers & TYPE_QUAL_VOLATILE)
 187     pp_c_ws_string (pp, func_type ? "__attribute__((noreturn))" : "volatile");
 188   if (qualifiers & TYPE_QUAL_RESTRICT)
 189     pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx ()
 190                          ? "restrict" : "__restrict__"));
 191 }
 192
 193 /* Pretty-print T using the type-cast notation '( type-name )'.  */
 194
 195 static void
 196 pp_c_type_cast (c_pretty_printer *pp, tree t)
 197 {
 198   pp_c_left_paren (pp);
 199   pp->type_id (t);
 200   pp_c_right_paren (pp);
 201 }
 202
 203 /* We're about to pretty-print a pointer type as indicated by T.
 204    Output a whitespace, if needed, preparing for subsequent output.  */
 205
 206 void
 207 pp_c_space_for_pointer_operator (c_pretty_printer *pp, tree t)
 208 {
 209   if (POINTER_TYPE_P (t))
 210     {
 211       tree pointee = strip_pointer_operator (TREE_TYPE (t));
 212       if (TREE_CODE (pointee) != ARRAY_TYPE
 213           && TREE_CODE (pointee) != FUNCTION_TYPE)
 214         pp_c_whitespace (pp);
 215     }
 216 }
 217
 218 \f
 219 /* Declarations.  */
 220
 221 /* C++ cv-qualifiers are called type-qualifiers in C.  Print out the
 222    cv-qualifiers of T.  If T is a declaration then it is the cv-qualifier
 223    of its type.  Take care of possible extensions.
 224
 225    type-qualifier-list:
 226        type-qualifier
 227        type-qualifier-list type-qualifier
 228
 229    type-qualifier:
 230        const
 231        restrict                              -- C99
 232        __restrict__                          -- GNU C
 233        address-space-qualifier               -- GNU C
 234        volatile
 235        _Atomic                               -- C11
 236
 237    address-space-qualifier:
 238        identifier                            -- GNU C  */
 239
 240 void
 241 pp_c_type_qualifier_list (c_pretty_printer *pp, tree t)
 242 {
 243   int qualifiers;
 244
 245   if (!t || t == error_mark_node)
 246     return;
 247
 248   if (!TYPE_P (t))
 249     t = TREE_TYPE (t);
 250
 251   qualifiers = TYPE_QUALS (t);
 252   pp_c_cv_qualifiers (pp, qualifiers,
 253                       TREE_CODE (t) == FUNCTION_TYPE);
 254
 255   if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (t)))
 256     {
 257       const char *as = c_addr_space_name (TYPE_ADDR_SPACE (t));
 258       pp_c_identifier (pp, as);
 259     }
 260 }
 261
 262 /* pointer:
 263       * type-qualifier-list(opt)
 264       * type-qualifier-list(opt) pointer  */
 265
 266 static void
 267 pp_c_pointer (c_pretty_printer *pp, tree t)
 268 {
 269   if (!TYPE_P (t) && TREE_CODE (t) != TYPE_DECL)
 270     t = TREE_TYPE (t);
 271   switch (TREE_CODE (t))
 272     {
 273     case POINTER_TYPE:
 274       /* It is easier to handle C++ reference types here.  */
 275     case REFERENCE_TYPE:
 276       if (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE)
 277         pp_c_pointer (pp, TREE_TYPE (t));
 278       if (TREE_CODE (t) == POINTER_TYPE)
 279         pp_c_star (pp);
 280       else
 281         pp_c_ampersand (pp);
 282       pp_c_type_qualifier_list (pp, t);
 283       break;
 284
 285       /* ??? This node is now in GENERIC and so shouldn't be here.  But
 286          we'll fix that later.  */
 287     case DECL_EXPR:
 288       pp->declaration (DECL_EXPR_DECL (t));
 289       pp_needs_newline (pp) = true;
 290       break;
 291
 292     default:
 293       pp_unsupported_tree (pp, t);
 294     }
 295 }
 296
 297 /* simple-type-specifier:
 298      type-specifier
 299
 300    type-specifier:
 301       void
 302       char
 303       short
 304       int
 305       long
 306       float
 307       double
 308       signed
 309       unsigned
 310       _Bool                          -- C99
 311       _Complex                       -- C99
 312       _Imaginary                     -- C99
 313       struct-or-union-specifier
 314       enum-specifier
 315       typedef-name.
 316
 317   GNU extensions.
 318   simple-type-specifier:
 319       __complex__
 320       __vector__   */
 321
 322 void
 323 c_pretty_printer::simple_type_specifier (tree t)
 324 {
 325   const enum tree_code code = TREE_CODE (t);
 326   switch (code)
 327     {
 328     case ERROR_MARK:
 329       translate_string ("<type-error>");
 330       break;
 331
 332     case IDENTIFIER_NODE:
 333       pp_c_identifier (this, IDENTIFIER_POINTER (t));
 334       break;
 335
 336     case VOID_TYPE:
 337     case BOOLEAN_TYPE:
 338     case INTEGER_TYPE:
 339     case REAL_TYPE:
 340     case FIXED_POINT_TYPE:
 341       if (TYPE_NAME (t))
 342         {
 343           t = TYPE_NAME (t);
 344           simple_type_specifier (t);
 345         }
 346       else
 347         {
 348           int prec = TYPE_PRECISION (t);
 349           tree common_t;
 350           if (ALL_FIXED_POINT_MODE_P (TYPE_MODE (t)))
 351             common_t = c_common_type_for_mode (TYPE_MODE (t),
 352                                                TYPE_SATURATING (t));
 353           else
 354             common_t = c_common_type_for_mode (TYPE_MODE (t),
 355                                                TYPE_UNSIGNED (t));
 356           if (common_t && TYPE_NAME (common_t))
 357             {
 358               simple_type_specifier (common_t);
 359               if (TYPE_PRECISION (common_t) != prec)
 360                 {
 361                   pp_colon (this);
 362                   pp_decimal_int (this, prec);
 363                 }
 364             }
 365           else
 366             {
 367               switch (code)
 368                 {
 369                 case INTEGER_TYPE:
 370                   translate_string (TYPE_UNSIGNED (t)
 371                                     ? "<unnamed-unsigned:"
 372                                     : "<unnamed-signed:");
 373                   break;
 374                 case REAL_TYPE:
 375                   translate_string ("<unnamed-float:");
 376                   break;
 377                 case FIXED_POINT_TYPE:
 378                   translate_string ("<unnamed-fixed:");
 379                   break;
 380                 default:
 381                   gcc_unreachable ();
 382                 }
 383               pp_decimal_int (this, prec);
 384               pp_greater (this);
 385             }
 386         }
 387       break;
 388
 389     case TYPE_DECL:
 390       if (DECL_NAME (t))
 391         id_expression (t);
 392       else
 393         translate_string ("<typedef-error>");
 394       break;
 395
 396     case UNION_TYPE:
 397     case RECORD_TYPE:
 398     case ENUMERAL_TYPE:
 399       if (TYPE_NAME (t) && TREE_CODE (TYPE_NAME (t)) == TYPE_DECL)
 400         /* Don't decorate the type if this is a typedef name.  */;
 401       else if (code == UNION_TYPE)
 402         pp_c_ws_string (this, "union");
 403       else if (code == RECORD_TYPE)
 404         pp_c_ws_string (this, "struct");
 405       else if (code == ENUMERAL_TYPE)
 406         pp_c_ws_string (this, "enum");
 407       else
 408         translate_string ("<tag-error>");
 409
 410       if (TYPE_NAME (t))
 411         id_expression (TYPE_NAME (t));
 412       else
 413         translate_string ("<anonymous>");
 414       break;
 415
 416     default:
 417       pp_unsupported_tree (this, t);
 418       break;
 419     }
 420 }
 421
 422 /* specifier-qualifier-list:
 423       type-specifier specifier-qualifier-list-opt
 424       type-qualifier specifier-qualifier-list-opt
 425
 426
 427   Implementation note:  Because of the non-linearities in array or
 428   function declarations, this routine prints not just the
 429   specifier-qualifier-list of such entities or types of such entities,
 430   but also the 'pointer' production part of their declarators.  The
 431   remaining part is done by declarator() or abstract_declarator().  */
 432
 433 void
 434 pp_c_specifier_qualifier_list (c_pretty_printer *pp, tree t)
 435 {
 436   const enum tree_code code = TREE_CODE (t);
 437
 438   if (!(pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE)
 439     pp_c_type_qualifier_list (pp, t);
 440   switch (code)
 441     {
 442     case REFERENCE_TYPE:
 443     case POINTER_TYPE:
 444       {
 445         /* Get the types-specifier of this type.  */
 446         tree pointee = strip_pointer_operator (TREE_TYPE (t));
 447         pp_c_specifier_qualifier_list (pp, pointee);
 448         if (TREE_CODE (pointee) == ARRAY_TYPE
 449             || TREE_CODE (pointee) == FUNCTION_TYPE)
 450           {
 451             pp_c_whitespace (pp);
 452             pp_c_left_paren (pp);
 453             pp_c_attributes_display (pp, TYPE_ATTRIBUTES (pointee));
 454           }
 455         else if (!c_dialect_cxx ())
 456           pp_c_whitespace (pp);
 457         pp_ptr_operator (pp, t);
 458       }
 459       break;
 460
 461     case FUNCTION_TYPE:
 462     case ARRAY_TYPE:
 463       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 464       break;
 465
 466     case VECTOR_TYPE:
 467     case COMPLEX_TYPE:
 468       if (code == COMPLEX_TYPE)
 469         pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx ()
 470                              ? "_Complex" : "__complex__"));
 471       else if (code == VECTOR_TYPE)
 472         {
 473           pp_c_ws_string (pp, "__vector");
 474           pp_c_left_paren (pp);
 475           pp_wide_integer (pp, TYPE_VECTOR_SUBPARTS (t));
 476           pp_c_right_paren (pp);
 477           pp_c_whitespace (pp);
 478         }
 479       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 480       break;
 481
 482     default:
 483       pp->simple_type_specifier (t);
 484       break;
 485     }
 486   if ((pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE)
 487     pp_c_type_qualifier_list (pp, t);
 488 }
 489
 490 /* parameter-type-list:
 491       parameter-list
 492       parameter-list , ...
 493
 494    parameter-list:
 495       parameter-declaration
 496       parameter-list , parameter-declaration
 497
 498    parameter-declaration:
 499       declaration-specifiers declarator
 500       declaration-specifiers abstract-declarator(opt)   */
 501
 502 void
 503 pp_c_parameter_type_list (c_pretty_printer *pp, tree t)
 504 {
 505   bool want_parm_decl = DECL_P (t) && !(pp->flags & pp_c_flag_abstract);
 506   tree parms = want_parm_decl ? DECL_ARGUMENTS (t) :  TYPE_ARG_TYPES (t);
 507   pp_c_left_paren (pp);
 508   if (parms == void_list_node)
 509     pp_c_ws_string (pp, "void");
 510   else
 511     {
 512       bool first = true;
 513       for ( ; parms && parms != void_list_node; parms = TREE_CHAIN (parms))
 514         {
 515           if (!first)
 516             pp_separate_with (pp, ',');
 517           first = false;
 518           pp->declaration_specifiers
 519             (want_parm_decl ? parms : TREE_VALUE (parms));
 520           if (want_parm_decl)
 521             pp->declarator (parms);
 522           else
 523             pp->abstract_declarator (TREE_VALUE (parms));
 524         }
 525       if (!first && !parms)
 526         {
 527           pp_separate_with (pp, ',');
 528           pp_c_ws_string (pp, "...");
 529         }
 530     }
 531   pp_c_right_paren (pp);
 532 }
 533
 534 /* abstract-declarator:
 535       pointer
 536       pointer(opt) direct-abstract-declarator  */
 537
 538 void
 539 c_pretty_printer::abstract_declarator (tree t)
 540 {
 541   if (TREE_CODE (t) == POINTER_TYPE)
 542     {
 543       if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE
 544           || TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE)
 545         pp_c_right_paren (this);
 546       t = TREE_TYPE (t);
 547     }
 548
 549   direct_abstract_declarator (t);
 550 }
 551
 552 /* direct-abstract-declarator:
 553       ( abstract-declarator )
 554       direct-abstract-declarator(opt) [ assignment-expression(opt) ]
 555       direct-abstract-declarator(opt) [ * ]
 556       direct-abstract-declarator(opt) ( parameter-type-list(opt) )  */
 557
 558 void
 559 c_pretty_printer::direct_abstract_declarator (tree t)
 560 {
 561   switch (TREE_CODE (t))
 562     {
 563     case POINTER_TYPE:
 564       abstract_declarator (t);
 565       break;
 566
 567     case FUNCTION_TYPE:
 568       pp_c_parameter_type_list (this, t);
 569       direct_abstract_declarator (TREE_TYPE (t));
 570       break;
 571
 572     case ARRAY_TYPE:
 573       pp_c_left_bracket (this);
 574       if (TYPE_DOMAIN (t) && TYPE_MAX_VALUE (TYPE_DOMAIN (t)))
 575         {
 576           tree maxval = TYPE_MAX_VALUE (TYPE_DOMAIN (t));
 577           tree type = TREE_TYPE (maxval);
 578
 579           if (tree_fits_shwi_p (maxval))
 580             pp_wide_integer (this, tree_to_shwi (maxval) + 1);
 581           else
 582             expression (fold_build2 (PLUS_EXPR, type, maxval,
 583                                      build_int_cst (type, 1)));
 584         }
 585       pp_c_right_bracket (this);
 586       direct_abstract_declarator (TREE_TYPE (t));
 587       break;
 588
 589     case IDENTIFIER_NODE:
 590     case VOID_TYPE:
 591     case BOOLEAN_TYPE:
 592     case INTEGER_TYPE:
 593     case REAL_TYPE:
 594     case FIXED_POINT_TYPE:
 595     case ENUMERAL_TYPE:
 596     case RECORD_TYPE:
 597     case UNION_TYPE:
 598     case VECTOR_TYPE:
 599     case COMPLEX_TYPE:
 600     case TYPE_DECL:
 601       break;
 602
 603     default:
 604       pp_unsupported_tree (this, t);
 605       break;
 606     }
 607 }
 608
 609 /* type-name:
 610       specifier-qualifier-list  abstract-declarator(opt)  */
 611
 612 void
 613 c_pretty_printer::type_id (tree t)
 614 {
 615   pp_c_specifier_qualifier_list (this, t);
 616   abstract_declarator (t);
 617 }
 618
 619 /* storage-class-specifier:
 620       typedef
 621       extern
 622       static
 623       auto
 624       register  */
 625
 626 void
 627 c_pretty_printer::storage_class_specifier (tree t)
 628 {
 629   if (TREE_CODE (t) == TYPE_DECL)
 630     pp_c_ws_string (this, "typedef");
 631   else if (DECL_P (t))
 632     {
 633       if (DECL_REGISTER (t))
 634         pp_c_ws_string (this, "register");
 635       else if (TREE_STATIC (t) && VAR_P (t))
 636         pp_c_ws_string (this, "static");
 637     }
 638 }
 639
 640 /* function-specifier:
 641       inline   */
 642
 643 void
 644 c_pretty_printer::function_specifier (tree t)
 645 {
 646   if (TREE_CODE (t) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (t))
 647     pp_c_ws_string (this, "inline");
 648 }
 649
 650 /* declaration-specifiers:
 651       storage-class-specifier declaration-specifiers(opt)
 652       type-specifier declaration-specifiers(opt)
 653       type-qualifier declaration-specifiers(opt)
 654       function-specifier declaration-specifiers(opt)  */
 655
 656 void
 657 c_pretty_printer::declaration_specifiers (tree t)
 658 {
 659   storage_class_specifier (t);
 660   function_specifier (t);
 661   pp_c_specifier_qualifier_list (this, DECL_P (t) ?  TREE_TYPE (t) : t);
 662 }
 663
 664 /* direct-declarator
 665       identifier
 666       ( declarator )
 667       direct-declarator [ type-qualifier-list(opt) assignment-expression(opt) ]
 668       direct-declarator [ static type-qualifier-list(opt) assignment-expression(opt)]
 669       direct-declarator [ type-qualifier-list static assignment-expression ]
 670       direct-declarator [ type-qualifier-list * ]
 671       direct-declarator ( parameter-type-list )
 672       direct-declarator ( identifier-list(opt) )  */
 673
 674 void
 675 c_pretty_printer::direct_declarator (tree t)
 676 {
 677   switch (TREE_CODE (t))
 678     {
 679     case VAR_DECL:
 680     case PARM_DECL:
 681     case TYPE_DECL:
 682     case FIELD_DECL:
 683     case LABEL_DECL:
 684       pp_c_space_for_pointer_operator (this, TREE_TYPE (t));
 685       pp_c_tree_decl_identifier (this, t);
 686       break;
 687
 688     case ARRAY_TYPE:
 689     case POINTER_TYPE:
 690       abstract_declarator (TREE_TYPE (t));
 691       break;
 692
 693     case FUNCTION_TYPE:
 694       pp_parameter_list (this, t);
 695       abstract_declarator (TREE_TYPE (t));
 696       break;
 697
 698     case FUNCTION_DECL:
 699       pp_c_space_for_pointer_operator (this, TREE_TYPE (TREE_TYPE (t)));
 700       pp_c_tree_decl_identifier (this, t);
 701       if (flags & pp_c_flag_abstract)
 702         abstract_declarator (TREE_TYPE (t));
 703       else
 704         {
 705           pp_parameter_list (this, t);
 706           abstract_declarator (TREE_TYPE (TREE_TYPE (t)));
 707         }
 708       break;
 709
 710     case INTEGER_TYPE:
 711     case REAL_TYPE:
 712     case FIXED_POINT_TYPE:
 713     case ENUMERAL_TYPE:
 714     case UNION_TYPE:
 715     case RECORD_TYPE:
 716       break;
 717
 718     default:
 719       pp_unsupported_tree (this, t);
 720       break;
 721     }
 722 }
 723
 724
 725 /* declarator:
 726       pointer(opt)  direct-declarator   */
 727
 728 void
 729 c_pretty_printer::declarator (tree t)
 730 {
 731   switch (TREE_CODE (t))
 732     {
 733     case INTEGER_TYPE:
 734     case REAL_TYPE:
 735     case FIXED_POINT_TYPE:
 736     case ENUMERAL_TYPE:
 737     case UNION_TYPE:
 738     case RECORD_TYPE:
 739       break;
 740
 741     case VAR_DECL:
 742     case PARM_DECL:
 743     case FIELD_DECL:
 744     case ARRAY_TYPE:
 745     case FUNCTION_TYPE:
 746     case FUNCTION_DECL:
 747     case TYPE_DECL:
 748       direct_declarator (t);
 749     break;
 750
 751
 752     default:
 753       pp_unsupported_tree (this, t);
 754       break;
 755     }
 756 }
 757
 758 /* declaration:
 759       declaration-specifiers init-declarator-list(opt) ;  */
 760
 761 void
 762 c_pretty_printer::declaration (tree t)
 763 {
 764   declaration_specifiers (t);
 765   pp_c_init_declarator (this, t);
 766 }
 767
 768 /* Pretty-print ATTRIBUTES using GNU C extension syntax.  */
 769
 770 void
 771 pp_c_attributes (c_pretty_printer *pp, tree attributes)
 772 {
 773   if (attributes == NULL_TREE)
 774     return;
 775
 776   pp_c_ws_string (pp, "__attribute__");
 777   pp_c_left_paren (pp);
 778   pp_c_left_paren (pp);
 779   for (; attributes != NULL_TREE; attributes = TREE_CHAIN (attributes))
 780     {
 781       pp_tree_identifier (pp, TREE_PURPOSE (attributes));
 782       if (TREE_VALUE (attributes))
 783         pp_c_call_argument_list (pp, TREE_VALUE (attributes));
 784
 785       if (TREE_CHAIN (attributes))
 786         pp_separate_with (pp, ',');
 787     }
 788   pp_c_right_paren (pp);
 789   pp_c_right_paren (pp);
 790 }
 791
 792 /* Pretty-print ATTRIBUTES using GNU C extension syntax for attributes
 793    marked to be displayed on disgnostic.  */
 794
 795 void
 796 pp_c_attributes_display (c_pretty_printer *pp, tree a)
 797 {
 798   bool is_first = true;
 799
 800   if (a == NULL_TREE)
 801     return;
 802
 803   for (; a != NULL_TREE; a = TREE_CHAIN (a))
 804     {
 805       const struct attribute_spec *as;
 806       as = lookup_attribute_spec (TREE_PURPOSE (a));
 807       if (!as || as->affects_type_identity == false)
 808         continue;
 809       if (c_dialect_cxx ()
 810           && !strcmp ("transaction_safe", as->name))
 811         /* In C++ transaction_safe is printed at the end of the declarator.  */
 812         continue;
 813       if (is_first)
 814        {
 815          pp_c_ws_string (pp, "__attribute__");
 816          pp_c_left_paren (pp);
 817          pp_c_left_paren (pp);
 818          is_first = false;
 819        }
 820       else
 821        {
 822          pp_separate_with (pp, ',');
 823        }
 824       pp_tree_identifier (pp, TREE_PURPOSE (a));
 825       if (TREE_VALUE (a))
 826        pp_c_call_argument_list (pp, TREE_VALUE (a));
 827     }
 828
 829   if (!is_first)
 830     {
 831       pp_c_right_paren (pp);
 832       pp_c_right_paren (pp);
 833       pp_c_whitespace (pp);
 834     }
 835 }
 836
 837 /* function-definition:
 838       declaration-specifiers declarator compound-statement  */
 839
 840 void
 841 pp_c_function_definition (c_pretty_printer *pp, tree t)
 842 {
 843   pp->declaration_specifiers (t);
 844   pp->declarator (t);
 845   pp_needs_newline (pp) = true;
 846   pp->statement (DECL_SAVED_TREE (t));
 847   pp_newline_and_flush (pp);
 848 }
 849
 850 \f
 851 /* Expressions.  */
 852
 853 /* Print out a c-char.  This is called solely for characters which are
 854    in the *target* execution character set.  We ought to convert them
 855    back to the *host* execution character set before printing, but we
 856    have no way to do this at present.  A decent compromise is to print
 857    all characters as if they were in the host execution character set,
 858    and not attempt to recover any named escape characters, but render
 859    all unprintables as octal escapes.  If the host and target character
 860    sets are the same, this produces relatively readable output.  If they
 861    are not the same, strings may appear as gibberish, but that's okay
 862    (in fact, it may well be what the reader wants, e.g. if they are looking
 863    to see if conversion to the target character set happened correctly).
 864
 865    A special case: we need to prefix \, ", and ' with backslashes.  It is
 866    correct to do so for the *host*'s \, ", and ', because the rest of the
 867    file appears in the host character set.  */
 868
 869 static void
 870 pp_c_char (c_pretty_printer *pp, int c)
 871 {
 872   if (ISPRINT (c))
 873     {
 874       switch (c)
 875         {
 876         case '\\': pp_string (pp, "\\\\"); break;
 877         case '\'': pp_string (pp, "\\\'"); break;
 878         case '\"': pp_string (pp, "\\\""); break;
 879         default:   pp_character (pp, c);
 880         }
 881     }
 882   else
 883     pp_scalar (pp, "\\%03o", (unsigned) c);
 884 }
 885
 886 /* Print out a STRING literal.  */
 887
 888 void
 889 pp_c_string_literal (c_pretty_printer *pp, tree s)
 890 {
 891   const char *p = TREE_STRING_POINTER (s);
 892   int n = TREE_STRING_LENGTH (s) - 1;
 893   int i;
 894   pp_doublequote (pp);
 895   for (i = 0; i < n; ++i)
 896     pp_c_char (pp, p[i]);
 897   pp_doublequote (pp);
 898 }
 899
 900 /* Pretty-print a VOID_CST (void_node).  */
 901
 902 static void
 903 pp_c_void_constant (c_pretty_printer *pp)
 904 {
 905   pp_c_type_cast (pp, void_type_node);
 906   pp_string (pp, "0");
 907 }
 908
 909 /* Pretty-print an INTEGER literal.  */
 910
 911 static void
 912 pp_c_integer_constant (c_pretty_printer *pp, tree i)
 913 {
 914   if (tree_fits_shwi_p (i))
 915     pp_wide_integer (pp, tree_to_shwi (i));
 916   else if (tree_fits_uhwi_p (i))
 917     pp_unsigned_wide_integer (pp, tree_to_uhwi (i));
 918   else
 919     {
 920       wide_int wi = wi::to_wide (i);
 921
 922       if (wi::lt_p (wi::to_wide (i), 0, TYPE_SIGN (TREE_TYPE (i))))
 923         {
 924           pp_minus (pp);
 925           wi = -wi;
 926         }
 927       print_hex (wi, pp_buffer (pp)->digit_buffer);
 928       pp_string (pp, pp_buffer (pp)->digit_buffer);
 929     }
 930 }
 931
 932 /* Print out a CHARACTER literal.  */
 933
 934 static void
 935 pp_c_character_constant (c_pretty_printer *pp, tree c)
 936 {
 937   pp_quote (pp);
 938   pp_c_char (pp, (unsigned) TREE_INT_CST_LOW (c));
 939   pp_quote (pp);
 940 }
 941
 942 /* Print out a BOOLEAN literal.  */
 943
 944 static void
 945 pp_c_bool_constant (c_pretty_printer *pp, tree b)
 946 {
 947   if (b == boolean_false_node)
 948     {
 949       if (c_dialect_cxx ())
 950         pp_c_ws_string (pp, "false");
 951       else if (flag_isoc99)
 952         pp_c_ws_string (pp, "_False");
 953       else
 954         pp_unsupported_tree (pp, b);
 955     }
 956   else if (b == boolean_true_node)
 957     {
 958       if (c_dialect_cxx ())
 959         pp_c_ws_string (pp, "true");
 960       else if (flag_isoc99)
 961         pp_c_ws_string (pp, "_True");
 962       else
 963         pp_unsupported_tree (pp, b);
 964     }
 965   else if (TREE_CODE (b) == INTEGER_CST)
 966     pp_c_integer_constant (pp, b);
 967   else
 968     pp_unsupported_tree (pp, b);
 969 }
 970
 971 /* Attempt to print out an ENUMERATOR.  Return true on success.  Else return
 972    false; that means the value was obtained by a cast, in which case
 973    print out the type-id part of the cast-expression -- the casted value
 974    is then printed by pp_c_integer_literal.  */
 975
 976 static bool
 977 pp_c_enumeration_constant (c_pretty_printer *pp, tree e)
 978 {
 979   bool value_is_named = true;
 980   tree type = TREE_TYPE (e);
 981   tree value;
 982
 983   /* Find the name of this constant.  */
 984   for (value = TYPE_VALUES (type);
 985        value != NULL_TREE && !tree_int_cst_equal (TREE_VALUE (value), e);
 986        value = TREE_CHAIN (value))
 987     ;
 988
 989   if (value != NULL_TREE)
 990     pp->id_expression (TREE_PURPOSE (value));
 991   else
 992     {
 993       /* Value must have been cast.  */
 994       pp_c_type_cast (pp, type);
 995       value_is_named = false;
 996     }
 997
 998   return value_is_named;
 999 }
1000
1001 /* Print out a REAL value as a decimal-floating-constant.  */
1002
1003 static void
1004 pp_c_floating_constant (c_pretty_printer *pp, tree r)
1005 {
1006   const struct real_format *fmt
1007     = REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (r)));
1008
1009   REAL_VALUE_TYPE floating_cst = TREE_REAL_CST (r);
1010   bool is_decimal = floating_cst.decimal;
1011
1012   /* See ISO C++ WG N1822.  Note: The fraction 643/2136 approximates
1013      log10(2) to 7 significant digits.  */
1014   int max_digits10 = 2 + (is_decimal ? fmt->p : fmt->p * 643L / 2136);
1015
1016   real_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_REAL_CST (r),
1017                    sizeof (pp_buffer (pp)->digit_buffer),
1018                    max_digits10, 1);
1019
1020   pp_string (pp, pp_buffer(pp)->digit_buffer);
1021   if (TREE_TYPE (r) == float_type_node)
1022     pp_character (pp, 'f');
1023   else if (TREE_TYPE (r) == long_double_type_node)
1024     pp_character (pp, 'l');
1025   else if (TREE_TYPE (r) == dfloat128_type_node)
1026     pp_string (pp, "dl");
1027   else if (TREE_TYPE (r) == dfloat64_type_node)
1028     pp_string (pp, "dd");
1029   else if (TREE_TYPE (r) == dfloat32_type_node)
1030     pp_string (pp, "df");
1031   else if (TREE_TYPE (r) != double_type_node)
1032     for (int i = 0; i < NUM_FLOATN_NX_TYPES; i++)
1033       if (TREE_TYPE (r) == FLOATN_NX_TYPE_NODE (i))
1034         {
1035           pp_character (pp, 'f');
1036           pp_decimal_int (pp, floatn_nx_types[i].n);
1037           if (floatn_nx_types[i].extended)
1038             pp_character (pp, 'x');
1039           break;
1040         }
1041 }
1042
1043 /* Print out a FIXED value as a decimal-floating-constant.  */
1044
1045 static void
1046 pp_c_fixed_constant (c_pretty_printer *pp, tree r)
1047 {
1048   fixed_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_FIXED_CST (r),
1049                    sizeof (pp_buffer (pp)->digit_buffer));
1050   pp_string (pp, pp_buffer(pp)->digit_buffer);
1051 }
1052
1053 /* Pretty-print a compound literal expression.  GNU extensions include
1054    vector constants.  */
1055
1056 static void
1057 pp_c_compound_literal (c_pretty_printer *pp, tree e)
1058 {
1059   tree type = TREE_TYPE (e);
1060   pp_c_type_cast (pp, type);
1061
1062   switch (TREE_CODE (type))
1063     {
1064     case RECORD_TYPE:
1065     case UNION_TYPE:
1066     case ARRAY_TYPE:
1067     case VECTOR_TYPE:
1068     case COMPLEX_TYPE:
1069       pp_c_brace_enclosed_initializer_list (pp, e);
1070       break;
1071
1072     default:
1073       pp_unsupported_tree (pp, e);
1074       break;
1075     }
1076 }
1077
1078 /* Pretty-print a COMPLEX_EXPR expression.  */
1079
1080 static void
1081 pp_c_complex_expr (c_pretty_printer *pp, tree e)
1082 {
1083   /* Handle a few common special cases, otherwise fallback
1084      to printing it as compound literal.  */
1085   tree type = TREE_TYPE (e);
1086   tree realexpr = TREE_OPERAND (e, 0);
1087   tree imagexpr = TREE_OPERAND (e, 1);
1088
1089   /* Cast of an COMPLEX_TYPE expression to a different COMPLEX_TYPE.  */
1090   if (TREE_CODE (realexpr) == NOP_EXPR
1091       && TREE_CODE (imagexpr) == NOP_EXPR
1092       && TREE_TYPE (realexpr) == TREE_TYPE (type)
1093       && TREE_TYPE (imagexpr) == TREE_TYPE (type)
1094       && TREE_CODE (TREE_OPERAND (realexpr, 0)) == REALPART_EXPR
1095       && TREE_CODE (TREE_OPERAND (imagexpr, 0)) == IMAGPART_EXPR
1096       && TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0)
1097          == TREE_OPERAND (TREE_OPERAND (imagexpr, 0), 0))
1098     {
1099       pp_c_type_cast (pp, type);
1100       pp->expression (TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0));
1101       return;
1102     }
1103
1104   /* Cast of an scalar expression to COMPLEX_TYPE.  */
1105   if ((integer_zerop (imagexpr) || real_zerop (imagexpr))
1106       && TREE_TYPE (realexpr) == TREE_TYPE (type))
1107     {
1108       pp_c_type_cast (pp, type);
1109       if (TREE_CODE (realexpr) == NOP_EXPR)
1110         realexpr = TREE_OPERAND (realexpr, 0);
1111       pp->expression (realexpr);
1112       return;
1113     }
1114
1115   pp_c_compound_literal (pp, e);
1116 }
1117
1118 /* constant:
1119       integer-constant
1120       floating-constant
1121       fixed-point-constant
1122       enumeration-constant
1123       character-constant   */
1124
1125 void
1126 c_pretty_printer::constant (tree e)
1127 {
1128   const enum tree_code code = TREE_CODE (e);
1129
1130   switch (code)
1131     {
1132     case VOID_CST:
1133       pp_c_void_constant (this);
1134       break;
1135
1136     case INTEGER_CST:
1137       {
1138         tree type = TREE_TYPE (e);
1139         if (type == boolean_type_node)
1140           pp_c_bool_constant (this, e);
1141         else if (type == char_type_node)
1142           pp_c_character_constant (this, e);
1143         else if (TREE_CODE (type) == ENUMERAL_TYPE
1144                  && pp_c_enumeration_constant (this, e))
1145           ;
1146         else
1147           pp_c_integer_constant (this, e);
1148       }
1149       break;
1150
1151     case REAL_CST:
1152       pp_c_floating_constant (this, e);
1153       break;
1154
1155     case FIXED_CST:
1156       pp_c_fixed_constant (this, e);
1157       break;
1158
1159     case STRING_CST:
1160       pp_c_string_literal (this, e);
1161       break;
1162
1163     case COMPLEX_CST:
1164       /* Sometimes, we are confused and we think a complex literal
1165          is a constant.  Such thing is a compound literal which
1166          grammatically belongs to postfix-expr production.  */
1167       pp_c_compound_literal (this, e);
1168       break;
1169
1170     default:
1171       pp_unsupported_tree (this, e);
1172       break;
1173     }
1174 }
1175
1176 /* Pretty-print a string such as an identifier, without changing its
1177    encoding, preceded by whitespace is necessary.  */
1178
1179 void
1180 pp_c_ws_string (c_pretty_printer *pp, const char *str)
1181 {
1182   pp_c_maybe_whitespace (pp);
1183   pp_string (pp, str);
1184   pp->padding = pp_before;
1185 }
1186
1187 void
1188 c_pretty_printer::translate_string (const char *gmsgid)
1189 {
1190   if (pp_translate_identifiers (this))
1191     pp_c_ws_string (this, _(gmsgid));
1192   else
1193     pp_c_ws_string (this, gmsgid);
1194 }
1195
1196 /* Pretty-print an IDENTIFIER_NODE, which may contain UTF-8 sequences
1197    that need converting to the locale encoding, preceded by whitespace
1198    is necessary.  */
1199
1200 void
1201 pp_c_identifier (c_pretty_printer *pp, const char *id)
1202 {
1203   pp_c_maybe_whitespace (pp);
1204   pp_identifier (pp, id);
1205   pp->padding = pp_before;
1206 }
1207
1208 /* Pretty-print a C primary-expression.
1209    primary-expression:
1210       identifier
1211       constant
1212       string-literal
1213       ( expression )   */
1214
1215 void
1216 c_pretty_printer::primary_expression (tree e)
1217 {
1218   switch (TREE_CODE (e))
1219     {
1220     case VAR_DECL:
1221     case PARM_DECL:
1222     case FIELD_DECL:
1223     case CONST_DECL:
1224     case FUNCTION_DECL:
1225     case LABEL_DECL:
1226       pp_c_tree_decl_identifier (this, e);
1227       break;
1228
1229     case IDENTIFIER_NODE:
1230       pp_c_tree_identifier (this, e);
1231       break;
1232
1233     case ERROR_MARK:
1234       translate_string ("<erroneous-expression>");
1235       break;
1236
1237     case RESULT_DECL:
1238       translate_string ("<return-value>");
1239       break;
1240
1241     case VOID_CST:
1242     case INTEGER_CST:
1243     case REAL_CST:
1244     case FIXED_CST:
1245     case STRING_CST:
1246       constant (e);
1247       break;
1248
1249     case TARGET_EXPR:
1250       pp_c_ws_string (this, "__builtin_memcpy");
1251       pp_c_left_paren (this);
1252       pp_ampersand (this);
1253       primary_expression (TREE_OPERAND (e, 0));
1254       pp_separate_with (this, ',');
1255       pp_ampersand (this);
1256       initializer (TREE_OPERAND (e, 1));
1257       if (TREE_OPERAND (e, 2))
1258         {
1259           pp_separate_with (this, ',');
1260           expression (TREE_OPERAND (e, 2));
1261         }
1262       pp_c_right_paren (this);
1263       break;
1264
1265     default:
1266       /* FIXME:  Make sure we won't get into an infinite loop.  */
1267       pp_c_left_paren (this);
1268       expression (e);
1269       pp_c_right_paren (this);
1270       break;
1271     }
1272 }
1273
1274 /* Print out a C initializer -- also support C compound-literals.
1275    initializer:
1276       assignment-expression:
1277       { initializer-list }
1278       { initializer-list , }   */
1279
1280 void
1281 c_pretty_printer::initializer (tree e)
1282 {
1283   if (TREE_CODE (e) == CONSTRUCTOR)
1284     pp_c_brace_enclosed_initializer_list (this, e);
1285   else
1286     expression (e);
1287 }
1288
1289 /* init-declarator:
1290       declarator:
1291       declarator = initializer   */
1292
1293 void
1294 pp_c_init_declarator (c_pretty_printer *pp, tree t)
1295 {
1296   pp->declarator (t);
1297   /* We don't want to output function definitions here.  There are handled
1298      elsewhere (and the syntactic form is bogus anyway).  */
1299   if (TREE_CODE (t) != FUNCTION_DECL && DECL_INITIAL (t))
1300     {
1301       tree init = DECL_INITIAL (t);
1302       /* This C++ bit is handled here because it is easier to do so.
1303          In templates, the C++ parser builds a TREE_LIST for a
1304          direct-initialization; the TREE_PURPOSE is the variable to
1305          initialize and the TREE_VALUE is the initializer.  */
1306       if (TREE_CODE (init) == TREE_LIST)
1307         {
1308           pp_c_left_paren (pp);
1309           pp->expression (TREE_VALUE (init));
1310           pp_right_paren (pp);
1311         }
1312       else
1313         {
1314           pp_space (pp);
1315           pp_equal (pp);
1316           pp_space (pp);
1317           pp->initializer (init);
1318         }
1319     }
1320 }
1321
1322 /* initializer-list:
1323       designation(opt) initializer
1324       initializer-list , designation(opt) initializer
1325
1326    designation:
1327       designator-list =
1328
1329    designator-list:
1330       designator
1331       designator-list designator
1332
1333    designator:
1334       [ constant-expression ]
1335       identifier   */
1336
1337 static void
1338 pp_c_initializer_list (c_pretty_printer *pp, tree e)
1339 {
1340   tree type = TREE_TYPE (e);
1341   const enum tree_code code = TREE_CODE (type);
1342
1343   if (TREE_CODE (e) == CONSTRUCTOR)
1344     {
1345       pp_c_constructor_elts (pp, CONSTRUCTOR_ELTS (e));
1346       return;
1347     }
1348
1349   switch (code)
1350     {
1351     case RECORD_TYPE:
1352     case UNION_TYPE:
1353     case ARRAY_TYPE:
1354       {
1355         tree init = TREE_OPERAND (e, 0);
1356         for (; init != NULL_TREE; init = TREE_CHAIN (init))
1357           {
1358             if (code == RECORD_TYPE || code == UNION_TYPE)
1359               {
1360                 pp_c_dot (pp);
1361                 pp->primary_expression (TREE_PURPOSE (init));
1362               }
1363             else
1364               {
1365                 pp_c_left_bracket (pp);
1366                 if (TREE_PURPOSE (init))
1367                   pp->constant (TREE_PURPOSE (init));
1368                 pp_c_right_bracket (pp);
1369               }
1370             pp_c_whitespace (pp);
1371             pp_equal (pp);
1372             pp_c_whitespace (pp);
1373             pp->initializer (TREE_VALUE (init));
1374             if (TREE_CHAIN (init))
1375               pp_separate_with (pp, ',');
1376           }
1377       }
1378       return;
1379
1380     case VECTOR_TYPE:
1381       if (TREE_CODE (e) == VECTOR_CST)
1382         {
1383           /* We don't create variable-length VECTOR_CSTs.  */
1384           unsigned int nunits = VECTOR_CST_NELTS (e).to_constant ();
1385           for (unsigned int i = 0; i < nunits; ++i)
1386             {
1387               if (i > 0)
1388                 pp_separate_with (pp, ',');
1389               pp->expression (VECTOR_CST_ELT (e, i));
1390             }
1391         }
1392       else
1393         break;
1394       return;
1395
1396     case COMPLEX_TYPE:
1397       if (TREE_CODE (e) == COMPLEX_CST || TREE_CODE (e) == COMPLEX_EXPR)
1398         {
1399           const bool cst = TREE_CODE (e) == COMPLEX_CST;
1400           pp->expression (cst ? TREE_REALPART (e) : TREE_OPERAND (e, 0));
1401           pp_separate_with (pp, ',');
1402           pp->expression (cst ? TREE_IMAGPART (e) : TREE_OPERAND (e, 1));
1403         }
1404       else
1405         break;
1406       return;
1407
1408     default:
1409       break;
1410     }
1411
1412   pp_unsupported_tree (pp, type);
1413 }
1414
1415 /* Pretty-print a brace-enclosed initializer-list.  */
1416
1417 static void
1418 pp_c_brace_enclosed_initializer_list (c_pretty_printer *pp, tree l)
1419 {
1420   pp_c_left_brace (pp);
1421   pp_c_initializer_list (pp, l);
1422   pp_c_right_brace (pp);
1423 }
1424
1425
1426 /*  This is a convenient function, used to bridge gap between C and C++
1427     grammars.
1428
1429     id-expression:
1430        identifier  */
1431
1432 void
1433 c_pretty_printer::id_expression (tree t)
1434 {
1435   switch (TREE_CODE (t))
1436     {
1437     case VAR_DECL:
1438     case PARM_DECL:
1439     case CONST_DECL:
1440     case TYPE_DECL:
1441     case FUNCTION_DECL:
1442     case FIELD_DECL:
1443     case LABEL_DECL:
1444       pp_c_tree_decl_identifier (this, t);
1445       break;
1446
1447     case IDENTIFIER_NODE:
1448       pp_c_tree_identifier (this, t);
1449       break;
1450
1451     default:
1452       pp_unsupported_tree (this, t);
1453       break;
1454     }
1455 }
1456
1457 /* postfix-expression:
1458       primary-expression
1459       postfix-expression [ expression ]
1460       postfix-expression ( argument-expression-list(opt) )
1461       postfix-expression . identifier
1462       postfix-expression -> identifier
1463       postfix-expression ++
1464       postfix-expression --
1465       ( type-name ) { initializer-list }
1466       ( type-name ) { initializer-list , }  */
1467
1468 void
1469 c_pretty_printer::postfix_expression (tree e)
1470 {
1471   enum tree_code code = TREE_CODE (e);
1472   switch (code)
1473     {
1474     case POSTINCREMENT_EXPR:
1475     case POSTDECREMENT_EXPR:
1476       postfix_expression (TREE_OPERAND (e, 0));
1477       pp_string (this, code == POSTINCREMENT_EXPR ? "++" : "--");
1478       break;
1479
1480     case ARRAY_REF:
1481       postfix_expression (TREE_OPERAND (e, 0));
1482       pp_c_left_bracket (this);
1483       expression (TREE_OPERAND (e, 1));
1484       pp_c_right_bracket (this);
1485       break;
1486
1487     case CALL_EXPR:
1488       {
1489         call_expr_arg_iterator iter;
1490         tree arg;
1491         postfix_expression (CALL_EXPR_FN (e));
1492         pp_c_left_paren (this);
1493         FOR_EACH_CALL_EXPR_ARG (arg, iter, e)
1494           {
1495             expression (arg);
1496             if (more_call_expr_args_p (&iter))
1497               pp_separate_with (this, ',');
1498           }
1499         pp_c_right_paren (this);
1500         break;
1501       }
1502
1503     case UNORDERED_EXPR:
1504       pp_c_ws_string (this, flag_isoc99
1505                            ? "isunordered"
1506                            : "__builtin_isunordered");
1507       goto two_args_fun;
1508
1509     case ORDERED_EXPR:
1510       pp_c_ws_string (this, flag_isoc99
1511                            ? "!isunordered"
1512                            : "!__builtin_isunordered");
1513       goto two_args_fun;
1514
1515     case UNLT_EXPR:
1516       pp_c_ws_string (this, flag_isoc99
1517                            ? "!isgreaterequal"
1518                            : "!__builtin_isgreaterequal");
1519       goto two_args_fun;
1520
1521     case UNLE_EXPR:
1522       pp_c_ws_string (this, flag_isoc99
1523                            ? "!isgreater"
1524                            : "!__builtin_isgreater");
1525       goto two_args_fun;
1526
1527     case UNGT_EXPR:
1528       pp_c_ws_string (this, flag_isoc99
1529                            ? "!islessequal"
1530                            : "!__builtin_islessequal");
1531       goto two_args_fun;
1532
1533     case UNGE_EXPR:
1534       pp_c_ws_string (this, flag_isoc99
1535                            ? "!isless"
1536                            : "!__builtin_isless");
1537       goto two_args_fun;
1538
1539     case UNEQ_EXPR:
1540       pp_c_ws_string (this, flag_isoc99
1541                            ? "!islessgreater"
1542                            : "!__builtin_islessgreater");
1543       goto two_args_fun;
1544
1545     case LTGT_EXPR:
1546       pp_c_ws_string (this, flag_isoc99
1547                            ? "islessgreater"
1548                            : "__builtin_islessgreater");
1549       goto two_args_fun;
1550
1551     case MAX_EXPR:
1552       pp_c_ws_string (this, "max");
1553       goto two_args_fun;
1554
1555     case MIN_EXPR:
1556       pp_c_ws_string (this, "min");
1557       goto two_args_fun;
1558
1559     two_args_fun:
1560       pp_c_left_paren (this);
1561       expression (TREE_OPERAND (e, 0));
1562       pp_separate_with (this, ',');
1563       expression (TREE_OPERAND (e, 1));
1564       pp_c_right_paren (this);
1565       break;
1566
1567     case ABS_EXPR:
1568       pp_c_ws_string (this, "__builtin_abs");
1569       pp_c_left_paren (this);
1570       expression (TREE_OPERAND (e, 0));
1571       pp_c_right_paren (this);
1572       break;
1573
1574     case COMPONENT_REF:
1575       {
1576         tree object = TREE_OPERAND (e, 0);
1577         if (INDIRECT_REF_P (object))
1578           {
1579             postfix_expression (TREE_OPERAND (object, 0));
1580             pp_c_arrow (this);
1581           }
1582         else
1583           {
1584             postfix_expression (object);
1585             pp_c_dot (this);
1586           }
1587         expression (TREE_OPERAND (e, 1));
1588       }
1589       break;
1590
1591     case BIT_FIELD_REF:
1592       {
1593         tree type = TREE_TYPE (e);
1594
1595         type = signed_or_unsigned_type_for (TYPE_UNSIGNED (type), type);
1596         if (type
1597             && tree_int_cst_equal (TYPE_SIZE (type), TREE_OPERAND (e, 1)))
1598           {
1599             HOST_WIDE_INT bitpos = tree_to_shwi (TREE_OPERAND (e, 2));
1600             HOST_WIDE_INT size = tree_to_shwi (TYPE_SIZE (type));
1601             if ((bitpos % size) == 0)
1602               {
1603                 pp_c_left_paren (this);
1604                 pp_c_left_paren (this);
1605                 type_id (type);
1606                 pp_c_star (this);
1607                 pp_c_right_paren (this);
1608                 pp_c_ampersand (this);
1609                 expression (TREE_OPERAND (e, 0));
1610                 pp_c_right_paren (this);
1611                 pp_c_left_bracket (this);
1612                 pp_wide_integer (this, bitpos / size);
1613                 pp_c_right_bracket (this);
1614                 break;
1615               }
1616           }
1617         pp_unsupported_tree (this, e);
1618       }
1619       break;
1620
1621     case MEM_REF:
1622       expression (e);
1623       break;
1624
1625     case COMPLEX_CST:
1626     case VECTOR_CST:
1627       pp_c_compound_literal (this, e);
1628       break;
1629
1630     case COMPLEX_EXPR:
1631       pp_c_complex_expr (this, e);
1632       break;
1633
1634     case COMPOUND_LITERAL_EXPR:
1635       e = DECL_INITIAL (COMPOUND_LITERAL_EXPR_DECL (e));
1636       /* Fall through.  */
1637     case CONSTRUCTOR:
1638       initializer (e);
1639       break;
1640
1641     case VA_ARG_EXPR:
1642       pp_c_ws_string (this, "__builtin_va_arg");
1643       pp_c_left_paren (this);
1644       assignment_expression (TREE_OPERAND (e, 0));
1645       pp_separate_with (this, ',');
1646       type_id (TREE_TYPE (e));
1647       pp_c_right_paren (this);
1648       break;
1649
1650     case ADDR_EXPR:
1651       if (TREE_CODE (TREE_OPERAND (e, 0)) == FUNCTION_DECL)
1652         {
1653           id_expression (TREE_OPERAND (e, 0));
1654           break;
1655         }
1656       /* fall through.  */
1657
1658     default:
1659       primary_expression (e);
1660       break;
1661     }
1662 }
1663
1664 /* Print out an expression-list; E is expected to be a TREE_LIST.  */
1665
1666 void
1667 pp_c_expression_list (c_pretty_printer *pp, tree e)
1668 {
1669   for (; e != NULL_TREE; e = TREE_CHAIN (e))
1670     {
1671       pp->expression (TREE_VALUE (e));
1672       if (TREE_CHAIN (e))
1673         pp_separate_with (pp, ',');
1674     }
1675 }
1676
1677 /* Print out V, which contains the elements of a constructor.  */
1678
1679 void
1680 pp_c_constructor_elts (c_pretty_printer *pp, vec<constructor_elt, va_gc> *v)
1681 {
1682   unsigned HOST_WIDE_INT ix;
1683   tree value;
1684
1685   FOR_EACH_CONSTRUCTOR_VALUE (v, ix, value)
1686     {
1687       pp->expression (value);
1688       if (ix != vec_safe_length (v) - 1)
1689         pp_separate_with (pp, ',');
1690     }
1691 }
1692
1693 /* Print out an expression-list in parens, as if it were the argument
1694    list to a function.  */
1695
1696 void
1697 pp_c_call_argument_list (c_pretty_printer *pp, tree t)
1698 {
1699   pp_c_left_paren (pp);
1700   if (t && TREE_CODE (t) == TREE_LIST)
1701     pp_c_expression_list (pp, t);
1702   pp_c_right_paren (pp);
1703 }
1704
1705 /* unary-expression:
1706       postfix-expression
1707       ++ cast-expression
1708       -- cast-expression
1709       unary-operator cast-expression
1710       sizeof unary-expression
1711       sizeof ( type-id )
1712
1713   unary-operator: one of
1714       * &  + - ! ~
1715
1716    GNU extensions.
1717    unary-expression:
1718       __alignof__ unary-expression
1719       __alignof__ ( type-id )
1720       __real__ unary-expression
1721       __imag__ unary-expression  */
1722
1723 void
1724 c_pretty_printer::unary_expression (tree e)
1725 {
1726   enum tree_code code = TREE_CODE (e);
1727   switch (code)
1728     {
1729     case PREINCREMENT_EXPR:
1730     case PREDECREMENT_EXPR:
1731       pp_string (this, code == PREINCREMENT_EXPR ? "++" : "--");
1732       unary_expression (TREE_OPERAND (e, 0));
1733       break;
1734
1735     case ADDR_EXPR:
1736     case INDIRECT_REF:
1737     case NEGATE_EXPR:
1738     case BIT_NOT_EXPR:
1739     case TRUTH_NOT_EXPR:
1740     case CONJ_EXPR:
1741       /* String literal are used by address.  */
1742       if (code == ADDR_EXPR && TREE_CODE (TREE_OPERAND (e, 0)) != STRING_CST)
1743         pp_ampersand (this);
1744       else if (code == INDIRECT_REF)
1745         {
1746           tree type = TREE_TYPE (TREE_OPERAND (e, 0));
1747           if (type && TREE_CODE (type) == REFERENCE_TYPE)
1748             /* Reference decay is implicit, don't print anything.  */;
1749           else
1750             pp_c_star (this);
1751         }
1752       else if (code == NEGATE_EXPR)
1753         pp_minus (this);
1754       else if (code == BIT_NOT_EXPR || code == CONJ_EXPR)
1755         pp_complement (this);
1756       else if (code == TRUTH_NOT_EXPR)
1757         pp_exclamation (this);
1758       pp_c_cast_expression (this, TREE_OPERAND (e, 0));
1759       break;
1760
1761     case MEM_REF:
1762       if (TREE_CODE (TREE_OPERAND (e, 0)) == ADDR_EXPR
1763           && integer_zerop (TREE_OPERAND (e, 1)))
1764         expression (TREE_OPERAND (TREE_OPERAND (e, 0), 0));
1765       else
1766         {
1767           pp_c_star (this);
1768           if (!integer_zerop (TREE_OPERAND (e, 1)))
1769             {
1770               pp_c_left_paren (this);
1771               if (!integer_onep (TYPE_SIZE_UNIT
1772                                  (TREE_TYPE (TREE_TYPE (TREE_OPERAND (e, 0))))))
1773                 pp_c_type_cast (this, ptr_type_node);
1774             }
1775           pp_c_cast_expression (this, TREE_OPERAND (e, 0));
1776           if (!integer_zerop (TREE_OPERAND (e, 1)))
1777             {
1778               pp_plus (this);
1779               pp_c_integer_constant (this,
1780                                      fold_convert (ssizetype,
1781                                                    TREE_OPERAND (e, 1)));
1782               pp_c_right_paren (this);
1783             }
1784         }
1785       break;
1786
1787     case REALPART_EXPR:
1788     case IMAGPART_EXPR:
1789       pp_c_ws_string (this, code == REALPART_EXPR ? "__real__" : "__imag__");
1790       pp_c_whitespace (this);
1791       unary_expression (TREE_OPERAND (e, 0));
1792       break;
1793
1794     default:
1795       postfix_expression (e);
1796       break;
1797     }
1798 }
1799
1800 /* cast-expression:
1801       unary-expression
1802       ( type-name ) cast-expression  */
1803
1804 void
1805 pp_c_cast_expression (c_pretty_printer *pp, tree e)
1806 {
1807   switch (TREE_CODE (e))
1808     {
1809     case FLOAT_EXPR:
1810     case FIX_TRUNC_EXPR:
1811     CASE_CONVERT:
1812     case VIEW_CONVERT_EXPR:
1813       if (!location_wrapper_p (e))
1814         pp_c_type_cast (pp, TREE_TYPE (e));
1815       pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
1816       break;
1817
1818     default:
1819       pp->unary_expression (e);
1820     }
1821 }
1822
1823 /* multiplicative-expression:
1824       cast-expression
1825       multiplicative-expression * cast-expression
1826       multiplicative-expression / cast-expression
1827       multiplicative-expression % cast-expression   */
1828
1829 void
1830 c_pretty_printer::multiplicative_expression (tree e)
1831 {
1832   enum tree_code code = TREE_CODE (e);
1833   switch (code)
1834     {
1835     case MULT_EXPR:
1836     case TRUNC_DIV_EXPR:
1837     case TRUNC_MOD_EXPR:
1838     case EXACT_DIV_EXPR:
1839     case RDIV_EXPR:
1840       multiplicative_expression (TREE_OPERAND (e, 0));
1841       pp_c_whitespace (this);
1842       if (code == MULT_EXPR)
1843         pp_c_star (this);
1844       else if (code == TRUNC_DIV_EXPR)
1845         pp_slash (this);
1846       else
1847         pp_modulo (this);
1848       pp_c_whitespace (this);
1849       pp_c_cast_expression (this, TREE_OPERAND (e, 1));
1850       break;
1851
1852     default:
1853       pp_c_cast_expression (this, e);
1854       break;
1855     }
1856 }
1857
1858 /* additive-expression:
1859       multiplicative-expression
1860       additive-expression + multiplicative-expression
1861       additive-expression - multiplicative-expression   */
1862
1863 static void
1864 pp_c_additive_expression (c_pretty_printer *pp, tree e)
1865 {
1866   enum tree_code code = TREE_CODE (e);
1867   switch (code)
1868     {
1869     case POINTER_PLUS_EXPR:
1870     case PLUS_EXPR:
1871     case POINTER_DIFF_EXPR:
1872     case MINUS_EXPR:
1873       pp_c_additive_expression (pp, TREE_OPERAND (e, 0));
1874       pp_c_whitespace (pp);
1875       if (code == PLUS_EXPR || code == POINTER_PLUS_EXPR)
1876         pp_plus (pp);
1877       else
1878         pp_minus (pp);
1879       pp_c_whitespace (pp);
1880       pp->multiplicative_expression (TREE_OPERAND (e, 1));
1881       break;
1882
1883     default:
1884       pp->multiplicative_expression (e);
1885       break;
1886     }
1887 }
1888
1889 /* additive-expression:
1890       additive-expression
1891       shift-expression << additive-expression
1892       shift-expression >> additive-expression   */
1893
1894 static void
1895 pp_c_shift_expression (c_pretty_printer *pp, tree e)
1896 {
1897   enum tree_code code = TREE_CODE (e);
1898   switch (code)
1899     {
1900     case LSHIFT_EXPR:
1901     case RSHIFT_EXPR:
1902     case LROTATE_EXPR:
1903     case RROTATE_EXPR:
1904       pp_c_shift_expression (pp, TREE_OPERAND (e, 0));
1905       pp_c_whitespace (pp);
1906       pp_string (pp, code == LSHIFT_EXPR ? "<<" :
1907                      code == RSHIFT_EXPR ? ">>" :
1908                      code == LROTATE_EXPR ? "<<<" : ">>>");
1909       pp_c_whitespace (pp);
1910       pp_c_additive_expression (pp, TREE_OPERAND (e, 1));
1911       break;
1912
1913     default:
1914       pp_c_additive_expression (pp, e);
1915     }
1916 }
1917
1918 /* relational-expression:
1919       shift-expression
1920       relational-expression < shift-expression
1921       relational-expression > shift-expression
1922       relational-expression <= shift-expression
1923       relational-expression >= shift-expression   */
1924
1925 static void
1926 pp_c_relational_expression (c_pretty_printer *pp, tree e)
1927 {
1928   enum tree_code code = TREE_CODE (e);
1929   switch (code)
1930     {
1931     case LT_EXPR:
1932     case GT_EXPR:
1933     case LE_EXPR:
1934     case GE_EXPR:
1935       pp_c_relational_expression (pp, TREE_OPERAND (e, 0));
1936       pp_c_whitespace (pp);
1937       if (code == LT_EXPR)
1938         pp_less (pp);
1939       else if (code == GT_EXPR)
1940         pp_greater (pp);
1941       else if (code == LE_EXPR)
1942         pp_less_equal (pp);
1943       else if (code == GE_EXPR)
1944         pp_greater_equal (pp);
1945       pp_c_whitespace (pp);
1946       pp_c_shift_expression (pp, TREE_OPERAND (e, 1));
1947       break;
1948
1949     default:
1950       pp_c_shift_expression (pp, e);
1951       break;
1952     }
1953 }
1954
1955 /* equality-expression:
1956       relational-expression
1957       equality-expression == relational-expression
1958       equality-equality != relational-expression  */
1959
1960 static void
1961 pp_c_equality_expression (c_pretty_printer *pp, tree e)
1962 {
1963   enum tree_code code = TREE_CODE (e);
1964   switch (code)
1965     {
1966     case EQ_EXPR:
1967     case NE_EXPR:
1968       pp_c_equality_expression (pp, TREE_OPERAND (e, 0));
1969       pp_c_whitespace (pp);
1970       pp_string (pp, code == EQ_EXPR ? "==" : "!=");
1971       pp_c_whitespace (pp);
1972       pp_c_relational_expression (pp, TREE_OPERAND (e, 1));
1973       break;
1974
1975     default:
1976       pp_c_relational_expression (pp, e);
1977       break;
1978     }
1979 }
1980
1981 /* AND-expression:
1982       equality-expression
1983       AND-expression & equality-equality   */
1984
1985 static void
1986 pp_c_and_expression (c_pretty_printer *pp, tree e)
1987 {
1988   if (TREE_CODE (e) == BIT_AND_EXPR)
1989     {
1990       pp_c_and_expression (pp, TREE_OPERAND (e, 0));
1991       pp_c_whitespace (pp);
1992       pp_ampersand (pp);
1993       pp_c_whitespace (pp);
1994       pp_c_equality_expression (pp, TREE_OPERAND (e, 1));
1995     }
1996   else
1997     pp_c_equality_expression (pp, e);
1998 }
1999
2000 /* exclusive-OR-expression:
2001      AND-expression
2002      exclusive-OR-expression ^ AND-expression  */
2003
2004 static void
2005 pp_c_exclusive_or_expression (c_pretty_printer *pp, tree e)
2006 {
2007   if (TREE_CODE (e) == BIT_XOR_EXPR
2008       || TREE_CODE (e) == TRUTH_XOR_EXPR)
2009     {
2010       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
2011       if (TREE_CODE (e) == BIT_XOR_EXPR)
2012         pp_c_maybe_whitespace (pp);
2013       else
2014         pp_c_whitespace (pp);
2015       pp_carret (pp);
2016       pp_c_whitespace (pp);
2017       pp_c_and_expression (pp, TREE_OPERAND (e, 1));
2018     }
2019   else
2020     pp_c_and_expression (pp, e);
2021 }
2022
2023 /* inclusive-OR-expression:
2024      exclusive-OR-expression
2025      inclusive-OR-expression | exclusive-OR-expression  */
2026
2027 static void
2028 pp_c_inclusive_or_expression (c_pretty_printer *pp, tree e)
2029 {
2030   if (TREE_CODE (e) == BIT_IOR_EXPR)
2031     {
2032       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
2033       pp_c_whitespace (pp);
2034       pp_bar (pp);
2035       pp_c_whitespace (pp);
2036       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 1));
2037     }
2038   else
2039     pp_c_exclusive_or_expression (pp, e);
2040 }
2041
2042 /* logical-AND-expression:
2043       inclusive-OR-expression
2044       logical-AND-expression && inclusive-OR-expression  */
2045
2046 static void
2047 pp_c_logical_and_expression (c_pretty_printer *pp, tree e)
2048 {
2049   if (TREE_CODE (e) == TRUTH_ANDIF_EXPR
2050       || TREE_CODE (e) == TRUTH_AND_EXPR)
2051     {
2052       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 0));
2053       pp_c_whitespace (pp);
2054       pp_ampersand_ampersand (pp);
2055       pp_c_whitespace (pp);
2056       pp_c_inclusive_or_expression (pp, TREE_OPERAND (e, 1));
2057     }
2058   else
2059     pp_c_inclusive_or_expression (pp, e);
2060 }
2061
2062 /* logical-OR-expression:
2063       logical-AND-expression
2064       logical-OR-expression || logical-AND-expression  */
2065
2066 void
2067 pp_c_logical_or_expression (c_pretty_printer *pp, tree e)
2068 {
2069   if (TREE_CODE (e) == TRUTH_ORIF_EXPR
2070       || TREE_CODE (e) == TRUTH_OR_EXPR)
2071     {
2072       pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0));
2073       pp_c_whitespace (pp);
2074       pp_bar_bar (pp);
2075       pp_c_whitespace (pp);
2076       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 1));
2077     }
2078   else
2079     pp_c_logical_and_expression (pp, e);
2080 }
2081
2082 /* conditional-expression:
2083       logical-OR-expression
2084       logical-OR-expression ? expression : conditional-expression  */
2085
2086 void
2087 c_pretty_printer::conditional_expression (tree e)
2088 {
2089   if (TREE_CODE (e) == COND_EXPR)
2090     {
2091       pp_c_logical_or_expression (this, TREE_OPERAND (e, 0));
2092       pp_c_whitespace (this);
2093       pp_question (this);
2094       pp_c_whitespace (this);
2095       expression (TREE_OPERAND (e, 1));
2096       pp_c_whitespace (this);
2097       pp_colon (this);
2098       pp_c_whitespace (this);
2099       conditional_expression (TREE_OPERAND (e, 2));
2100     }
2101   else
2102     pp_c_logical_or_expression (this, e);
2103 }
2104
2105
2106 /* assignment-expression:
2107       conditional-expression
2108       unary-expression assignment-operator  assignment-expression
2109
2110    assignment-expression: one of
2111       =    *=    /=    %=    +=    -=    >>=    <<=    &=    ^=    |=  */
2112
2113 void
2114 c_pretty_printer::assignment_expression (tree e)
2115 {
2116   if (TREE_CODE (e) == MODIFY_EXPR
2117       || TREE_CODE (e) == INIT_EXPR)
2118     {
2119       unary_expression (TREE_OPERAND (e, 0));
2120       pp_c_whitespace (this);
2121       pp_equal (this);
2122       pp_space (this);
2123       expression (TREE_OPERAND (e, 1));
2124     }
2125   else
2126     conditional_expression (e);
2127 }
2128
2129 /* expression:
2130        assignment-expression
2131        expression , assignment-expression
2132
2133   Implementation note:  instead of going through the usual recursion
2134   chain, I take the liberty of dispatching nodes to the appropriate
2135   functions.  This makes some redundancy, but it worths it. That also
2136   prevents a possible infinite recursion between primary_expression ()
2137   and expression ().  */
2138
2139 void
2140 c_pretty_printer::expression (tree e)
2141 {
2142   switch (TREE_CODE (e))
2143     {
2144     case VOID_CST:
2145       pp_c_void_constant (this);
2146       break;
2147
2148     case INTEGER_CST:
2149       pp_c_integer_constant (this, e);
2150       break;
2151
2152     case REAL_CST:
2153       pp_c_floating_constant (this, e);
2154       break;
2155
2156     case FIXED_CST:
2157       pp_c_fixed_constant (this, e);
2158       break;
2159
2160     case STRING_CST:
2161       pp_c_string_literal (this, e);
2162       break;
2163
2164     case IDENTIFIER_NODE:
2165     case FUNCTION_DECL:
2166     case VAR_DECL:
2167     case CONST_DECL:
2168     case PARM_DECL:
2169     case RESULT_DECL:
2170     case FIELD_DECL:
2171     case LABEL_DECL:
2172     case ERROR_MARK:
2173       primary_expression (e);
2174       break;
2175
2176     case SSA_NAME:
2177       if (SSA_NAME_VAR (e)
2178           && !DECL_ARTIFICIAL (SSA_NAME_VAR (e)))
2179         expression (SSA_NAME_VAR (e));
2180       else
2181         translate_string ("<unknown>");
2182       break;
2183
2184     case POSTINCREMENT_EXPR:
2185     case POSTDECREMENT_EXPR:
2186     case ARRAY_REF:
2187     case CALL_EXPR:
2188     case COMPONENT_REF:
2189     case BIT_FIELD_REF:
2190     case COMPLEX_CST:
2191     case COMPLEX_EXPR:
2192     case VECTOR_CST:
2193     case ORDERED_EXPR:
2194     case UNORDERED_EXPR:
2195     case LTGT_EXPR:
2196     case UNEQ_EXPR:
2197     case UNLE_EXPR:
2198     case UNLT_EXPR:
2199     case UNGE_EXPR:
2200     case UNGT_EXPR:
2201     case MAX_EXPR:
2202     case MIN_EXPR:
2203     case ABS_EXPR:
2204     case CONSTRUCTOR:
2205     case COMPOUND_LITERAL_EXPR:
2206     case VA_ARG_EXPR:
2207       postfix_expression (e);
2208       break;
2209
2210     case CONJ_EXPR:
2211     case ADDR_EXPR:
2212     case INDIRECT_REF:
2213     case MEM_REF:
2214     case NEGATE_EXPR:
2215     case BIT_NOT_EXPR:
2216     case TRUTH_NOT_EXPR:
2217     case PREINCREMENT_EXPR:
2218     case PREDECREMENT_EXPR:
2219     case REALPART_EXPR:
2220     case IMAGPART_EXPR:
2221       unary_expression (e);
2222       break;
2223
2224     case FLOAT_EXPR:
2225     case FIX_TRUNC_EXPR:
2226     CASE_CONVERT:
2227     case VIEW_CONVERT_EXPR:
2228       pp_c_cast_expression (this, e);
2229       break;
2230
2231     case MULT_EXPR:
2232     case TRUNC_MOD_EXPR:
2233     case TRUNC_DIV_EXPR:
2234     case EXACT_DIV_EXPR:
2235     case RDIV_EXPR:
2236       multiplicative_expression (e);
2237       break;
2238
2239     case LSHIFT_EXPR:
2240     case RSHIFT_EXPR:
2241     case LROTATE_EXPR:
2242     case RROTATE_EXPR:
2243       pp_c_shift_expression (this, e);
2244       break;
2245
2246     case LT_EXPR:
2247     case GT_EXPR:
2248     case LE_EXPR:
2249     case GE_EXPR:
2250       pp_c_relational_expression (this, e);
2251       break;
2252
2253     case BIT_AND_EXPR:
2254       pp_c_and_expression (this, e);
2255       break;
2256
2257     case BIT_XOR_EXPR:
2258     case TRUTH_XOR_EXPR:
2259       pp_c_exclusive_or_expression (this, e);
2260       break;
2261
2262     case BIT_IOR_EXPR:
2263       pp_c_inclusive_or_expression (this, e);
2264       break;
2265
2266     case TRUTH_ANDIF_EXPR:
2267     case TRUTH_AND_EXPR:
2268       pp_c_logical_and_expression (this, e);
2269       break;
2270
2271     case TRUTH_ORIF_EXPR:
2272     case TRUTH_OR_EXPR:
2273       pp_c_logical_or_expression (this, e);
2274       break;
2275
2276     case EQ_EXPR:
2277     case NE_EXPR:
2278       pp_c_equality_expression (this, e);
2279       break;
2280
2281     case COND_EXPR:
2282       conditional_expression (e);
2283       break;
2284
2285     case POINTER_PLUS_EXPR:
2286     case PLUS_EXPR:
2287     case POINTER_DIFF_EXPR:
2288     case MINUS_EXPR:
2289       pp_c_additive_expression (this, e);
2290       break;
2291
2292     case MODIFY_EXPR:
2293     case INIT_EXPR:
2294       assignment_expression (e);
2295       break;
2296
2297     case COMPOUND_EXPR:
2298       pp_c_left_paren (this);
2299       expression (TREE_OPERAND (e, 0));
2300       pp_separate_with (this, ',');
2301       assignment_expression (TREE_OPERAND (e, 1));
2302       pp_c_right_paren (this);
2303       break;
2304
2305     case NON_LVALUE_EXPR:
2306     case SAVE_EXPR:
2307       expression (TREE_OPERAND (e, 0));
2308       break;
2309
2310     case TARGET_EXPR:
2311       postfix_expression (TREE_OPERAND (e, 1));
2312       break;
2313
2314     case BIND_EXPR:
2315     case GOTO_EXPR:
2316       /* We don't yet have a way of dumping statements in a
2317          human-readable format.  */
2318       pp_string (this, "({...})");
2319       break;
2320
2321     case C_MAYBE_CONST_EXPR:
2322       expression (C_MAYBE_CONST_EXPR_EXPR (e));
2323       break;
2324
2325     default:
2326       pp_unsupported_tree (this, e);
2327       break;
2328     }
2329 }
2330
2331
2332 \f
2333 /* Statements.  */
2334
2335 void
2336 c_pretty_printer::statement (tree stmt)
2337 {
2338   if (stmt == NULL)
2339     return;
2340
2341   if (pp_needs_newline (this))
2342     pp_newline_and_indent (this, 0);
2343
2344   dump_generic_node (this, stmt, pp_indentation (this), 0, true);
2345 }
2346
2347 \f
2348 /* Initialize the PRETTY-PRINTER for handling C codes.  */
2349
2350 c_pretty_printer::c_pretty_printer ()
2351   : pretty_printer (),
2352     offset_list (),
2353     flags ()
2354 {
2355   type_specifier_seq        = pp_c_specifier_qualifier_list;
2356   ptr_operator              = pp_c_pointer;
2357   parameter_list            = pp_c_parameter_type_list;
2358 }
2359
2360
2361 /* Print the tree T in full, on file FILE.  */
2362
2363 void
2364 print_c_tree (FILE *file, tree t)
2365 {
2366   c_pretty_printer pp;
2367
2368   pp_needs_newline (&pp) = true;
2369   pp.buffer->stream = file;
2370   pp.statement (t);
2371   pp_newline_and_flush (&pp);
2372 }
2373
2374 /* Print the tree T in full, on stderr.  */
2375
2376 DEBUG_FUNCTION void
2377 debug_c_tree (tree t)
2378 {
2379   print_c_tree (stderr, t);
2380   fputc ('\n', stderr);
2381 }
2382
2383 /* Output the DECL_NAME of T.  If T has no DECL_NAME, output a string made
2384    up of T's memory address.  */
2385
2386 void
2387 pp_c_tree_decl_identifier (c_pretty_printer *pp, tree t)
2388 {
2389   const char *name;
2390
2391   gcc_assert (DECL_P (t));
2392
2393   if (DECL_NAME (t))
2394     name = IDENTIFIER_POINTER (DECL_NAME (t));
2395   else
2396     {
2397       static char xname[8];
2398       sprintf (xname, "<U%4hx>", ((unsigned short) ((uintptr_t) (t)
2399                                                     & 0xffff)));
2400       name = xname;
2401     }
2402
2403   pp_c_identifier (pp, name);
2404 }
2405
2406 #if CHECKING_P
2407
2408 namespace selftest {
2409
2410 /* Selftests for pretty-printing trees.  */
2411
2412 /* Verify that EXPR printed by c_pretty_printer is EXPECTED, using
2413    LOC as the effective location for any failures.  */
2414
2415 static void
2416 assert_c_pretty_printer_output (const location &loc, const char *expected,
2417                                 tree expr)
2418 {
2419   c_pretty_printer pp;
2420   pp.expression (expr);
2421   ASSERT_STREQ_AT (loc, expected, pp_formatted_text (&pp));
2422 }
2423
2424 /* Helper function for calling assert_c_pretty_printer_output.
2425    This is to avoid having to write SELFTEST_LOCATION.  */
2426
2427 #define ASSERT_C_PRETTY_PRINTER_OUTPUT(EXPECTED, EXPR) \
2428   SELFTEST_BEGIN_STMT                                           \
2429     assert_c_pretty_printer_output ((SELFTEST_LOCATION),        \
2430                                     (EXPECTED),         \
2431                                     (EXPR));                    \
2432   SELFTEST_END_STMT
2433
2434 /* Verify that location wrappers don't show up in pretty-printed output.  */
2435
2436 static void
2437 test_location_wrappers ()
2438 {
2439   /* VAR_DECL.  */
2440   tree id = get_identifier ("foo");
2441   tree decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, id,
2442                           integer_type_node);
2443   tree wrapped_decl = maybe_wrap_with_location (decl, BUILTINS_LOCATION);
2444   ASSERT_NE (wrapped_decl, decl);
2445   ASSERT_C_PRETTY_PRINTER_OUTPUT ("foo", decl);
2446   ASSERT_C_PRETTY_PRINTER_OUTPUT ("foo", wrapped_decl);
2447
2448   /* INTEGER_CST.  */
2449   tree int_cst = build_int_cst (integer_type_node, 42);
2450   tree wrapped_cst = maybe_wrap_with_location (int_cst, BUILTINS_LOCATION);
2451   ASSERT_NE (wrapped_cst, int_cst);
2452   ASSERT_C_PRETTY_PRINTER_OUTPUT ("42", int_cst);
2453   ASSERT_C_PRETTY_PRINTER_OUTPUT ("42", wrapped_cst);
2454 }
2455
2456 /* Run all of the selftests within this file.  */
2457
2458 void
2459 c_pretty_print_c_tests ()
2460 {
2461   test_location_wrappers ();
2462 }
2463
2464 } // namespace selftest
2465
2466 #endif /* CHECKING_P */