kc3-lang/gnulib/tests/test-stddef-h-c++2.cc
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Hash : d19a73d0
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Date : 2025-05-28T01:59:05
stddef-h: Make 'unreachable' usable in C++ mode. Reported by Pierre Ossman <ossman@cendio.se> at <https://savannah.gnu.org/bugs/?67152>. * m4/stddef_h.m4 (gl_STDDEF_H): Also test whether unreachable is defined by <stddef.h> in C++ mode. * lib/stddef.in.h: In C++ mode, include <utility> and either import 'unreachable' from the std namespace or define it as an inline function. * tests/test-stddef-h.c: Disable some tests in C++ mode. * tests/test-stddef-h-c++.cc: Perform nearly the same tests in C++ mode as in C mode. * tests/test-stddef-h-c++2.cc: Rename some variables. Disable the NULL test with clang on Windows. * tests/test-stddef-h-c++3.cc: New file. * modules/stddef-h-c++-tests (Files): Include it. (Makefile.am): Link test-stddef-h-c++ with test-stddef-h-c++3.o.
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tests/test-stddef-h-c++2.cc
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/* Test of <stddef.h> substitute in C++ mode. Copyright (C) 2019-2025 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #define GNULIB_NAMESPACE gnulib #include <config.h> #include <cstddef> /* Test the expected contents of <cstddef>, cf. <https://en.cppreference.com/w/cpp/header/cstddef>. */ /* Check that appropriate types are defined. */ ptrdiff_t b2 = 1; size_t c2 = 2; #if !(defined __cplusplus && defined _MSC_VER) /* Check that NULL can be passed through varargs as a pointer type, per POSIX 2008. */ static_assert (sizeof NULL == sizeof (void *)); #endif /* Check that offsetof produces integer constants with correct type. */ struct d { char e; char f; }; static_assert (sizeof (offsetof (struct d, e)) == sizeof (size_t)); static_assert (offsetof (struct d, f) == 1); #include <limits.h> /* INT_MAX */ /* offsetof promotes to an unsigned integer if and only if sizes do not fit in int. */ static_assert ((offsetof (struct d, e) < -1) == (INT_MAX < (size_t) -1));