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0372ffe97b
Sadly, in C++ there's not an universal way to get what language standard is used to compile GLib-based programs, in fact while most compilers relies on `__cplusplus`, MSVC is defining that, but it does not use it to expose such information (unless `/Zc:__cplusplus` arg is used). On the other side, MSVC reports the language standard via _MSVC_LANG [1]. This complication makes us defining some macros in a very complex way (such as glib_typeof()), because we need to perform many checks just to understand if a C++ compiler is used and what standard is expecting. To avoid this, define multiple macros that can be used to figure out what C++ standard is being used. [1] https://docs.microsoft.com/en-us/cpp/build/reference/zc-cplusplus?view=msvc-170
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* GLib testing framework examples and tests
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*
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* Copyright © 2018 Endless Mobile, Inc.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Philip Withnall <withnall@endlessm.com>
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*/
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#include "config.h"
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#include <glib.h>
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#if defined (__APPLE__) || defined (HAVE_COCOA) || defined (HAVE_CARBON)
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# ifndef G_OS_UNIX
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G_STATIC_ASSERT (FALSE);
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# endif
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# ifndef G_OS_DARWIN
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G_STATIC_ASSERT (FALSE);
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# endif
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#endif
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#ifdef G_CXX_STD_VERSION
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#error G_CXX_STD_VERSION should be undefined in C programs
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#endif
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G_STATIC_ASSERT (!G_CXX_STD_CHECK_VERSION (98));
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/* Test that G_STATIC_ASSERT_EXPR can be used as an expression */
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static void
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test_assert_static (void)
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{
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G_STATIC_ASSERT (4 == 4);
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if (G_STATIC_ASSERT_EXPR (1 == 1), sizeof (gchar) == 2)
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g_assert_not_reached ();
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}
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/* Test G_ALIGNOF() gives the same results as the G_STRUCT_OFFSET fallback. This
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* should be the minimal alignment for the given type.
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*
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* This is necessary because the implementation of G_ALIGNOF() varies depending
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* on the compiler in use. We want all implementations to be consistent.
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*
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* In the case that the compiler uses the G_STRUCT_OFFSET fallback, this test
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* is a no-op. */
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static void
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test_alignof_fallback (void)
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{
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#define check_alignof(type) \
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g_assert_cmpint (G_ALIGNOF (type), ==, G_STRUCT_OFFSET (struct { char a; type b; }, b))
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check_alignof (char);
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check_alignof (int);
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check_alignof (float);
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check_alignof (double);
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check_alignof (struct { char a; int b; });
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}
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static void
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test_struct_sizeof_member (void)
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{
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G_STATIC_ASSERT (G_SIZEOF_MEMBER (struct { char a; int b; }, a) == sizeof (char));
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g_assert_cmpint (G_SIZEOF_MEMBER (struct { char a; int b; }, b), ==, sizeof (int));
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}
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int
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main (int argc,
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char *argv[])
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{
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g_test_init (&argc, &argv, NULL);
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g_test_add_func ("/alignof/fallback", test_alignof_fallback);
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g_test_add_func ("/assert/static", test_assert_static);
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g_test_add_func ("/struct/sizeof_member", test_struct_sizeof_member);
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return g_test_run ();
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}
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