libstdc++-v3/testsuite/18_support/headers/cstddef/macros.cc

   1 // { dg-do compile }
   2 // { dg-options "-Wno-conversion-null" }
   3 // 2001-02-06  Benjamin Kosnik  <bkoz@redhat.com>
   4
   5 // Copyright (C) 2001-2020 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <cstddef>
  23
  24 namespace gnu
  25 {
  26   struct test_type
  27   {
  28     int i;
  29     int j;
  30   };
  31
  32   // offsetof
  33   void test01()
  34   {
  35     std::size_t i __attribute__((unused)) = offsetof(struct test_type, i);
  36 #ifndef offsetof
  37     #error "offsetof_must_be_a_macro"
  38 #endif
  39   }
  40
  41   // NULL
  42   void test02()
  43   {
  44     // Must not be (void*)0
  45     const int j __attribute__((unused)) = NULL;
  46
  47 #ifndef NULL
  48     #error "NULL_must_be_a_macro"
  49 #endif
  50   }
  51 }