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The C and C++ Include Header Files

/usr/include/c++/13/ext/new_allocator.h


$ cat -n /usr/include/c++/13/ext/new_allocator.h

     1	// Allocator that wraps operator new -*- C++ -*-
     2	
     3	// Copyright (C) 2001-2023 Free Software Foundation, Inc.
     4	//
     5	// This file is part of the GNU ISO C++ Library.  This library is free
     6	// software; you can redistribute it and/or modify it under the
     7	// terms of the GNU General Public License as published by the
     8	// Free Software Foundation; either version 3, or (at your option)
     9	// any later version.
    10	
    11	// This library is distributed in the hope that it will be useful,
    12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14	// GNU General Public License for more details.
    15	
    16	// Under Section 7 of GPL version 3, you are granted additional
    17	// permissions described in the GCC Runtime Library Exception, version
    18	// 3.1, as published by the Free Software Foundation.
    19	
    20	// You should have received a copy of the GNU General Public License and
    21	// a copy of the GCC Runtime Library Exception along with this program;
    22	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    23	// <http://www.gnu.org/licenses/>.
    24	
    25	/** @file ext/new_allocator.h
    26	 *  This file is a GNU extension to the Standard C++ Library.
    27	 */
    28	
    29	#ifndef _NEW_ALLOCATOR_H
    30	#define _NEW_ALLOCATOR_H 1
    31	
    32	#include <bits/requires_hosted.h> // GNU extensions are currently omitted
    33	
    34	#include <bits/new_allocator.h>
    35	
    36	namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
    37	{
    38	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    39	
    40	  /**
    41	   *  @brief  An allocator that uses global `new`, as per C++03 [20.4.1].
    42	   *  @ingroup allocators
    43	   *
    44	   *  This is precisely the allocator defined in the C++ Standard.
    45	   *    - all allocation calls `operator new`
    46	   *    - all deallocation calls `operator delete`
    47	   *
    48	   *  This is a non-standard extension that can be used to guarantee
    49	   *  allocation from `new` even if the library has been configured to
    50	   *  use a different implementation for `std::allocator`.
    51	   *
    52	   *  @tparam  _Tp  Type of allocated object.
    53	   *
    54	   *  @headerfile ext/new_allocator.h
    55	   */
    56	  template<typename _Tp>
    57	    class new_allocator : public std::__new_allocator<_Tp>
    58	    {
    59	    public:
    60	#if __cplusplus <= 201703L
    61	      template<typename _Tp1>
    62		struct rebind
    63		{ typedef new_allocator<_Tp1> other; };
    64	#endif
    65	
    66	      new_allocator() _GLIBCXX_USE_NOEXCEPT { }
    67	
    68	      new_allocator(const new_allocator&) _GLIBCXX_USE_NOEXCEPT { }
    69	
    70	      template<typename _Tp1>
    71		new_allocator(const new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { }
    72	    };
    73	
    74	_GLIBCXX_END_NAMESPACE_VERSION
    75	} // namespace
    76	
    77	#endif