gcc/objcp/objcp-decl.c

   1 /* Process the ObjC-specific declarations and variables for
   2    the Objective-C++ compiler.
   3    Copyright (C) 2005-2020 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 "cp-tree.h"
  26
  27 #include "c-family/c-objc.h"
  28 #include "objcp-decl.h"
  29
  30 /* Hacks to simulate start_struct() and finish_struct(). */
  31
  32 tree
  33 objcp_start_struct (location_t loc ATTRIBUTE_UNUSED,
  34                     enum tree_code code ATTRIBUTE_UNUSED, tree name)
  35 {
  36   tree s;
  37   /* The idea here is to mimic the actions that the C++ parser takes when
  38      constructing 'extern "C" struct NAME {'.  */
  39   push_lang_context (lang_name_c);
  40
  41   if (!name)
  42     name = make_anon_name ();
  43
  44   s = xref_tag (record_type, name, TAG_how::GLOBAL);
  45   CLASSTYPE_DECLARED_CLASS (s) = 0;  /* this is a 'struct', not a 'class'.  */
  46   xref_basetypes (s, NULL_TREE);     /* no base classes here!  */
  47
  48   return begin_class_definition (s);
  49 }
  50
  51 tree
  52 objcp_finish_struct (location_t loc ATTRIBUTE_UNUSED,
  53                      tree t, tree fieldlist, tree attributes)
  54 {
  55   tree field, next_field;
  56
  57   for (field = fieldlist; field; field = next_field)
  58   {
  59     next_field = TREE_CHAIN (field);      /* insert one field at a time;  */
  60     TREE_CHAIN (field) = NULL_TREE;       /* otherwise, grokfield croaks. */
  61     finish_member_declaration (field);
  62   }
  63   t = finish_struct (t, attributes);
  64
  65   /* If we are inside an @interface and are generating the list of
  66      ivars, we need to check for duplicate ivars.
  67   */
  68   if (fieldlist)
  69     objc_detect_field_duplicates (true);
  70
  71   pop_lang_context ();
  72
  73   return t;
  74 }
  75
  76 void
  77 objcp_finish_function (void)
  78 {
  79   /* The C++ flavor of 'finish_function' does not generate RTL -- one has
  80      to call 'expand_or_defer_fn' to do that.  */
  81   expand_or_defer_fn (finish_function (0));
  82 }
  83
  84 tree
  85 objcp_xref_tag (enum tree_code code ATTRIBUTE_UNUSED, tree name)
  86 {
  87   return xref_tag (record_type, name, TAG_how::GLOBAL);
  88 }
  89
  90 int
  91 objcp_comptypes (tree type1, tree type2)
  92 {
  93   return comptypes (type1, type2, COMPARE_STRICT);
  94 }
  95
  96 tree
  97 objcp_begin_compound_stmt (int flags ATTRIBUTE_UNUSED)
  98 {
  99   return begin_compound_stmt (0);
 100 }
 101
 102 tree
 103 objcp_end_compound_stmt (tree stmt, int flags ATTRIBUTE_UNUSED)
 104 {
 105   /* The following has been snarfed from
 106      cp/semantics.c:finish_compound_stmt().  */
 107   if (TREE_CODE (stmt) == BIND_EXPR)
 108     BIND_EXPR_BODY (stmt) = do_poplevel (BIND_EXPR_BODY (stmt));
 109   else if (STATEMENT_LIST_NO_SCOPE (stmt))
 110     stmt = pop_stmt_list (stmt);
 111   else
 112     stmt = do_poplevel (stmt);
 113
 114   return stmt;
 115 }