kc3-lang/gnulib/tests/test-stddef-h-c++3.cc

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• Hash : df7978ac
  Author :
  Date : 2025-06-02T18:32:26
  

  stddef-h: Fix compilation errors in C++ mode (regression 2025-05-27).
  
  * m4/stddef_h.m4 (gl_STDDEF_H): Set and substitute HAVE_C_UNREACHABLE.
  Don't test for unreachable in <stddef.h> in C++. Set
  GL_GENERATE_STDDEF_H to true always.
  * lib/stddef.in.h (gl_unreachable): Renamed from _gl_unreachable. Test
  HAVE_C_UNREACHABLE.
  (unreachable): Don't define in C++ mode. Don't define if
  HAVE_C_UNREACHABLE is 1.
  * modules/stddef-h (Makefile.am): Substitute HAVE_C_UNREACHABLE.
  * tests/test-stddef-h.c (test_unreachable_optimization,
  test_unreachable_noreturn): Don't define in C++ mode.
  (test_gl_unreachable_optimization, test_gl_unreachable_noreturn): New
  functions.
  * tests/test-stddef-h-c++3.cc (test_cxx_unreachable_1): Test
  gl_unreachable instead of unreachable.
  * lib/error.in.h (__gl_error_call1): Use gl_unreachable instead of
  unreachable.
  

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• tests/test-stddef-h-c++3.cc

• /* 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/>.  */
  
  #include <config.h>
  
  /* Define gl_unreachable.  */
  #include <stddef.h>
  /* Define std::unreachable (in C++23 or newer).  */
  #include <utility>
  
  void
  test_cxx_unreachable_1 ()
  {
    if (2 < 1)
      gl_unreachable ();
  #if defined __cpp_lib_unreachable
    if (3 < 1)
      std::unreachable ();
  #endif
  }
  
  #if defined __cpp_lib_unreachable
  using std::unreachable;
  
  void
  test_cxx_unreachable_2 ()
  {
    if (3 < 1)
      unreachable ();
  }
  #endif
  

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