gcc/objcp/objcp-decl.c

   1 /* Process the ObjC-specific declarations and variables for
   2    the Objective-C++ compiler.
   3    Copyright (C) 2005-2015 Free Software Foundation, Inc.
   4    Contributed by Ziemowit Laski  <zlaski@apple.com>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "vec.h"
  27 #include "alias.h"
  28 #include "tree.h"
  29 #include "options.h"
  30 #include "inchash.h"
  31 #include "cp-tree.h"
  32
  33 #include "c-family/c-objc.h"
  34 #include "objc-act.h"
  35 #include "objcp-decl.h"
  36
  37 /* Hacks to simulate start_struct() and finish_struct(). */
  38
  39 tree
  40 objcp_start_struct (location_t loc ATTRIBUTE_UNUSED,
  41                     enum tree_code code ATTRIBUTE_UNUSED, tree name)
  42 {
  43   tree s;
  44   /* The idea here is to mimic the actions that the C++ parser takes when
  45      constructing 'extern "C" struct NAME {'.  */
  46   push_lang_context (lang_name_c);
  47
  48   if (!name)
  49     name = make_anon_name ();
  50
  51   s = xref_tag (record_type, name, ts_global, 0);
  52   CLASSTYPE_DECLARED_CLASS (s) = 0;  /* this is a 'struct', not a 'class'.  */
  53   xref_basetypes (s, NULL_TREE);     /* no base classes here!  */
  54
  55   return begin_class_definition (s);
  56 }
  57
  58 tree
  59 objcp_finish_struct (location_t loc ATTRIBUTE_UNUSED,
  60                      tree t, tree fieldlist, tree attributes)
  61 {
  62   tree field, next_field;
  63
  64   for (field = fieldlist; field; field = next_field)
  65   {
  66     next_field = TREE_CHAIN (field);      /* insert one field at a time;  */
  67     TREE_CHAIN (field) = NULL_TREE;       /* otherwise, grokfield croaks. */
  68     finish_member_declaration (field);
  69   }
  70   t = finish_struct (t, attributes);
  71
  72   /* If we are inside an @interface and are generating the list of
  73      ivars, we need to check for duplicate ivars.
  74   */
  75   if (fieldlist)
  76     objc_detect_field_duplicates (true);
  77
  78   pop_lang_context ();
  79
  80   return t;
  81 }
  82
  83 void
  84 objcp_finish_function (void)
  85 {
  86   /* The C++ flavor of 'finish_function' does not generate RTL -- one has
  87      to call 'expand_or_defer_fn' to do that.  */
  88   expand_or_defer_fn (finish_function (0));
  89 }
  90
  91 tree
  92 objcp_xref_tag (enum tree_code code ATTRIBUTE_UNUSED, tree name)
  93 {
  94   return xref_tag (record_type, name, ts_global, false);
  95 }
  96
  97 int
  98 objcp_comptypes (tree type1, tree type2)
  99 {
 100   return comptypes (type1, type2, COMPARE_STRICT);
 101 }
 102
 103 tree
 104 objcp_begin_compound_stmt (int flags ATTRIBUTE_UNUSED)
 105 {
 106   return begin_compound_stmt (0);
 107 }
 108
 109 tree
 110 objcp_end_compound_stmt (tree stmt, int flags ATTRIBUTE_UNUSED)
 111 {
 112   /* The following has been snarfed from
 113      cp/semantics.c:finish_compound_stmt().  */
 114   if (TREE_CODE (stmt) == BIND_EXPR)
 115     BIND_EXPR_BODY (stmt) = do_poplevel (BIND_EXPR_BODY (stmt));
 116   else if (STATEMENT_LIST_NO_SCOPE (stmt))
 117     stmt = pop_stmt_list (stmt);
 118   else
 119     stmt = do_poplevel (stmt);
 120
 121   return stmt;
 122 }