/usr/include/js-17.0/mozilla/NullPtr.h is in libmozjs-17.0-dev 17.0.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Implements a workaround for compilers which do not support the C++11 nullptr
* constant.
*/
#ifndef mozilla_NullPtr_h_
#define mozilla_NullPtr_h_
#if defined(__clang__)
# ifndef __has_extension
# define __has_extension __has_feature
# endif
# if __has_extension(cxx_nullptr)
# define MOZ_HAVE_CXX11_NULLPTR
# endif
#elif defined(__GNUC__)
# if defined(_GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
# if (__GNUC__ * 1000 + __GNU_MINOR__) >= 4006
# define MOZ_HAVE_CXX11_NULLPTR
# endif
# endif
#elif _MSC_VER >= 1600
# define MOZ_HAVE_CXX11_NULLPTR
#endif
/**
* Use C++11 nullptr if available; otherwise use __null for gcc, or a 0 literal
* with the correct size to match the size of a pointer on a given platform.
*/
#ifndef MOZ_HAVE_CXX11_NULLPTR
# if defined(__GNUC__)
# define nullptr __null
# elif defined(_WIN64)
# define nullptr 0LL
# else
# define nullptr 0L
# endif
#endif
#endif /* mozilla_NullPtr_h_ */
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