Nikolas Klauser 8abca171c3
[libc++] Introduce unversioned namespace macros (#133009)
We've started using `_LIBCPP_BEGIN_NAMESPACE_STD` and
`_LIBCPP_END_NAMESPACE_STD` for more than just the namespace for a while
now. For example, we're using it to add visibility annotations to types.
This works very well and avoids a bunch of annotations, but doesn't work
for the few places where we have an unversioned namespace. This adds
`_LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD` and
`_LIBCPP_END_UNVERSIONED_NAMESPACE_STD` to make it simpler to add new
annotations consistently across the library as well as making it more
explicit that the unversioned namespace is indeed intended.
2025-03-27 11:34:38 +01:00

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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___NEW_NOTHROW_T_H
#define _LIBCPP___NEW_NOTHROW_T_H
#include <__config>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if defined(_LIBCPP_ABI_VCRUNTIME)
# include <new.h>
#else
_LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD
struct _LIBCPP_EXPORTED_FROM_ABI nothrow_t {
explicit nothrow_t() = default;
};
extern _LIBCPP_EXPORTED_FROM_ABI const nothrow_t nothrow;
_LIBCPP_END_UNVERSIONED_NAMESPACE_STD
#endif // _LIBCPP_ABI_VCRUNTIME
#endif // _LIBCPP___NEW_NOTHROW_T_H