FM / bits

/usr/include/c++/11/bits

Name	Size	Mode	Actions
algorithmfwd.h	24547	0644	edit dl rm
align.h	3711	0644	edit dl rm
allocated_ptr.h	3329	0644	edit dl rm
allocator.h	9737	0644	edit dl rm
alloc_traits.h	27632	0644	edit dl rm
atomic_base.h	57414	0644	edit dl rm
atomic_futex.h	12394	0644	edit dl rm
atomic_lockfree_defines.h	2353	0644	edit dl rm
atomic_timed_wait.h	13530	0644	edit dl rm
atomic_wait.h	12557	0644	edit dl rm
basic_ios.h	16080	0644	edit dl rm
basic_ios.tcc	6083	0644	edit dl rm
basic_string.h	251944	0644	edit dl rm
basic_string.tcc	54189	0644	edit dl rm
boost_concept_check.h	27182	0644	edit dl rm
c++0x_warning.h	1474	0644	edit dl rm
charconv.h	3435	0644	edit dl rm
char_traits.h	29350	0644	edit dl rm
codecvt.h	25500	0644	edit dl rm
concept_check.h	3423	0644	edit dl rm
cpp_type_traits.h	14003	0644	edit dl rm
cxxabi_forced.h	1811	0644	edit dl rm
cxxabi_init_exception.h	2220	0644	edit dl rm
deque.tcc	42361	0644	edit dl rm
enable_special_members.h	12452	0644	edit dl rm
erase_if.h	2066	0644	edit dl rm
exception.h	2504	0644	edit dl rm
exception_defines.h	1645	0644	edit dl rm
exception_ptr.h	7640	0644	edit dl rm
forward_list.h	50387	0644	edit dl rm
forward_list.tcc	14035	0644	edit dl rm
fstream.tcc	33672	0644	edit dl rm
fs_dir.h	16409	0644	edit dl rm
fs_fwd.h	10771	0644	edit dl rm
fs_ops.h	10739	0644	edit dl rm
fs_path.h	39745	0644	edit dl rm
functexcept.h	3509	0644	edit dl rm
functional_hash.h	8591	0644	edit dl rm
gslice.h	5519	0644	edit dl rm
gslice_array.h	7892	0644	edit dl rm
hashtable.h	84951	0644	edit dl rm
hashtable_policy.h	62156	0644	edit dl rm
hash_bytes.h	2146	0644	edit dl rm
indirect_array.h	7902	0644	edit dl rm
invoke.h	6059	0644	edit dl rm
ios_base.h	31934	0644	edit dl rm
istream.tcc	31595	0644	edit dl rm
iterator_concepts.h	33335	0644	edit dl rm
list.tcc	17201	0644	edit dl rm
localefwd.h	5943	0644	edit dl rm
locale_classes.h	25044	0644	edit dl rm
locale_classes.tcc	8375	0644	edit dl rm
locale_conv.h	18822	0644	edit dl rm
locale_facets.h	93655	0644	edit dl rm
locale_facets.tcc	40463	0644	edit dl rm
locale_facets_nonio.h	69704	0644	edit dl rm
locale_facets_nonio.tcc	47533	0644	edit dl rm
mask_array.h	7716	0644	edit dl rm
max_size_type.h	22715	0644	edit dl rm
memoryfwd.h	2504	0644	edit dl rm
move.h	6798	0644	edit dl rm
nested_exception.h	4887	0644	edit dl rm
node_handle.h	10920	0644	edit dl rm
ostream.tcc	12315	0644	edit dl rm
ostream_insert.h	4038	0644	edit dl rm
parse_numbers.h	7980	0644	edit dl rm
postypes.h	8465	0644	edit dl rm
predefined_ops.h	10177	0644	edit dl rm
ptr_traits.h	6708	0644	edit dl rm
quoted_string.h	5053	0644	edit dl rm
random.h	178359	0644	edit dl rm
random.tcc	105688	0644	edit dl rm
ranges_algo.h	116831	0644	edit dl rm
ranges_algobase.h	18871	0644	edit dl rm
ranges_base.h	24392	0644	edit dl rm
ranges_cmp.h	6017	0644	edit dl rm
ranges_uninitialized.h	18130	0644	edit dl rm
ranges_util.h	20591	0644	edit dl rm
range_access.h	10707	0644	edit dl rm
refwrap.h	13208	0644	edit dl rm
regex.h	103969	0644	edit dl rm
regex.tcc	16492	0644	edit dl rm
regex_automaton.h	10788	0644	edit dl rm
regex_automaton.tcc	7722	0644	edit dl rm
regex_compiler.h	16219	0644	edit dl rm
regex_compiler.tcc	19158	0644	edit dl rm
regex_constants.h	15549	0644	edit dl rm
regex_error.h	5015	0644	edit dl rm
regex_executor.h	8852	0644	edit dl rm
regex_executor.tcc	18837	0644	edit dl rm
regex_scanner.h	7047	0644	edit dl rm
regex_scanner.tcc	15249	0644	edit dl rm
semaphore_base.h	7936	0644	edit dl rm
shared_ptr.h	30981	0644	edit dl rm
shared_ptr_atomic.h	9874	0644	edit dl rm
shared_ptr_base.h	54907	0644	edit dl rm
slice_array.h	9619	0644	edit dl rm
specfun.h	47240	0644	edit dl rm
sstream.tcc	10148	0644	edit dl rm
std_abs.h	3384	0644	edit dl rm
std_function.h	22863	0644	edit dl rm
std_mutex.h	6443	0644	edit dl rm
std_thread.h	8589	0644	edit dl rm
stl_algo.h	214703	0644	edit dl rm
stl_algobase.h	76254	0644	edit dl rm
stl_bvector.h	35574	0644	edit dl rm
stl_construct.h	8800	0644	edit dl rm
stl_deque.h	76970	0644	edit dl rm
stl_function.h	43897	0644	edit dl rm
stl_heap.h	20756	0644	edit dl rm
stl_iterator.h	78851	0644	edit dl rm
stl_iterator_base_funcs.h	8178	0644	edit dl rm
stl_iterator_base_types.h	9662	0644	edit dl rm
stl_list.h	69779	0644	edit dl rm
stl_map.h	54693	0644	edit dl rm
stl_multimap.h	43534	0644	edit dl rm
stl_multiset.h	37675	0644	edit dl rm
stl_numeric.h	14601	0644	edit dl rm
stl_pair.h	20135	0644	edit dl rm
stl_queue.h	25036	0644	edit dl rm
stl_raw_storage_iter.h	3830	0644	edit dl rm
stl_relops.h	4594	0644	edit dl rm
stl_set.h	37939	0644	edit dl rm
stl_stack.h	12684	0644	edit dl rm
stl_tempbuf.h	8655	0644	edit dl rm
stl_tree.h	73922	0644	edit dl rm
stl_uninitialized.h	34013	0644	edit dl rm
stl_vector.h	65919	0644	edit dl rm
streambuf.tcc	4929	0644	edit dl rm
streambuf_iterator.h	15532	0644	edit dl rm
stream_iterator.h	7697	0644	edit dl rm
stringfwd.h	2690	0644	edit dl rm
string_view.tcc	7167	0644	edit dl rm
this_thread_sleep.h	3307	0644	edit dl rm
uniform_int_dist.h	13052	0644	edit dl rm
unique_lock.h	6143	0644	edit dl rm
unique_ptr.h	32537	0644	edit dl rm
unordered_map.h	76669	0644	edit dl rm
unordered_set.h	62934	0644	edit dl rm
uses_allocator.h	6906	0644	edit dl rm
uses_allocator_args.h	7562	0644	edit dl rm
valarray_after.h	23283	0644	edit dl rm
valarray_array.h	21295	0644	edit dl rm
valarray_array.tcc	7254	0644	edit dl rm
valarray_before.h	19142	0644	edit dl rm
vector.tcc	30985	0644	edit dl rm

Edit: /usr/include/c++/11/bits/allocator.h (9737B)

// Allocators -*- C++ -*-

// Copyright (C) 2001-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)
// any later version.

// This library 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/*
 * Copyright (c) 1996-1997
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */

/** @file bits/allocator.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{memory}
 */

#ifndef _ALLOCATOR_H
#define _ALLOCATOR_H 1

#include <bits/c++allocator.h> // Define the base class to std::allocator.
#include <bits/memoryfwd.h>
#if __cplusplus >= 201103L
#include <type_traits>
#endif

#define __cpp_lib_incomplete_container_elements 201505

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**
   *  @addtogroup allocators
   *  @{
   */

// Since C++20 the primary template should be used for allocator<void>,
  // but then it would have a non-trivial default ctor and dtor for C++20,
  // but trivial for C++98-17, which would be an ABI incompatibiliy between
  // different standard dialects. So C++20 still uses the allocator<void>
  // explicit specialization, with the historical ABI properties, but with
  // the same members that are present in the primary template.

/// allocator<void> specialization.
  template<>
    class allocator<void>
    {
    public:
      typedef void        value_type;
      typedef size_t      size_type;
      typedef ptrdiff_t   difference_type;

#if __cplusplus <= 201703L
      // These were removed for C++20, allocator_traits does the right thing.
      typedef void*       pointer;
      typedef const void* const_pointer;

template<typename _Tp1>
	struct rebind
	{ typedef allocator<_Tp1> other; };
#endif

#if __cplusplus >= 201103L
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2103. std::allocator propagate_on_container_move_assignment
      using propagate_on_container_move_assignment = true_type;

using is_always_equal
	_GLIBCXX20_DEPRECATED_SUGGEST("std::allocator_traits::is_always_equal")
	= true_type;

#if __cplusplus >= 202002L
      // As noted above, these members are present for C++20 to provide the
      // same API as the primary template, but still trivial as in pre-C++20.
      allocator() = default;
      ~allocator() = default;

template<typename _Up>
	constexpr
	allocator(const allocator<_Up>&) noexcept { }

// No allocate member because it's ill-formed by LWG 3307.
      // No deallocate member because it would be undefined to call it
      // with any pointer which wasn't obtained from allocate.
#endif // C++20
#endif // C++11
    };

/**
   * @brief  The @a standard allocator, as per C++03 [20.4.1].
   *
   *  See https://gcc.gnu.org/onlinedocs/libstdc++/manual/memory.html#std.util.memory.allocator
   *  for further details.
   *
   *  @tparam  _Tp  Type of allocated object.
   */
  template<typename _Tp>
    class allocator : public __allocator_base<_Tp>
    {
    public:
      typedef _Tp        value_type;
      typedef size_t     size_type;
      typedef ptrdiff_t  difference_type;

#if __cplusplus <= 201703L
      // These were removed for C++20.
      typedef _Tp*       pointer;
      typedef const _Tp* const_pointer;
      typedef _Tp&       reference;
      typedef const _Tp& const_reference;

template<typename _Tp1>
	struct rebind
	{ typedef allocator<_Tp1> other; };
#endif

#if __cplusplus >= 201103L
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2103. std::allocator propagate_on_container_move_assignment
      using propagate_on_container_move_assignment = true_type;

using is_always_equal
	_GLIBCXX20_DEPRECATED_SUGGEST("std::allocator_traits::is_always_equal")
	= true_type;
#endif

// _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 3035. std::allocator's constructors should be constexpr
      _GLIBCXX20_CONSTEXPR
      allocator() _GLIBCXX_NOTHROW { }

_GLIBCXX20_CONSTEXPR
      allocator(const allocator& __a) _GLIBCXX_NOTHROW
      : __allocator_base<_Tp>(__a) { }

#if __cplusplus >= 201103L
      // Avoid implicit deprecation.
      allocator& operator=(const allocator&) = default;
#endif

template<typename _Tp1>
	_GLIBCXX20_CONSTEXPR
	allocator(const allocator<_Tp1>&) _GLIBCXX_NOTHROW { }

#if __cpp_constexpr_dynamic_alloc
      constexpr
#endif
      ~allocator() _GLIBCXX_NOTHROW { }

#if __cplusplus > 201703L
      [[nodiscard,__gnu__::__always_inline__]]
      constexpr _Tp*
      allocate(size_t __n)
      {
#ifdef __cpp_lib_is_constant_evaluated
	if (std::is_constant_evaluated())
	  return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));
#endif
	return __allocator_base<_Tp>::allocate(__n, 0);
      }

[[__gnu__::__always_inline__]]
      constexpr void
      deallocate(_Tp* __p, size_t __n)
      {
#ifdef __cpp_lib_is_constant_evaluated
	if (std::is_constant_evaluated())
	  {
	    ::operator delete(__p);
	    return;
	  }
#endif
	__allocator_base<_Tp>::deallocate(__p, __n);
      }
#endif // C++20

friend _GLIBCXX20_CONSTEXPR bool
      operator==(const allocator&, const allocator&) _GLIBCXX_NOTHROW
      { return true; }

#if __cpp_impl_three_way_comparison < 201907L
      friend _GLIBCXX20_CONSTEXPR bool
      operator!=(const allocator&, const allocator&) _GLIBCXX_NOTHROW
      { return false; }
#endif

// Inherit everything else.
    };

template<typename _T1, typename _T2>
    inline _GLIBCXX20_CONSTEXPR bool
    operator==(const allocator<_T1>&, const allocator<_T2>&)
    _GLIBCXX_NOTHROW
    { return true; }

#if __cpp_impl_three_way_comparison < 201907L
  template<typename _T1, typename _T2>
    inline _GLIBCXX20_CONSTEXPR bool
    operator!=(const allocator<_T1>&, const allocator<_T2>&)
    _GLIBCXX_NOTHROW
    { return false; }
#endif

// Invalid allocator<cv T> partial specializations.
  // allocator_traits::rebind_alloc can be used to form a valid allocator type.
  template<typename _Tp>
    class allocator<const _Tp>
    {
    public:
      typedef _Tp value_type;
      template<typename _Up> allocator(const allocator<_Up>&) { }
    };

template<typename _Tp>
    class allocator<volatile _Tp>
    {
    public:
      typedef _Tp value_type;
      template<typename _Up> allocator(const allocator<_Up>&) { }
    };

template<typename _Tp>
    class allocator<const volatile _Tp>
    {
    public:
      typedef _Tp value_type;
      template<typename _Up> allocator(const allocator<_Up>&) { }
    };

/// @} group allocator

// Inhibit implicit instantiations for required instantiations,
  // which are defined via explicit instantiations elsewhere.
#if _GLIBCXX_EXTERN_TEMPLATE
  extern template class allocator<char>;
  extern template class allocator<wchar_t>;
#endif

// Undefine.
#undef __allocator_base

// To implement Option 3 of DR 431.
  template<typename _Alloc, bool = __is_empty(_Alloc)>
    struct __alloc_swap
    { static void _S_do_it(_Alloc&, _Alloc&) _GLIBCXX_NOEXCEPT { } };

template<typename _Alloc>
    struct __alloc_swap<_Alloc, false>
    {
      static void
      _S_do_it(_Alloc& __one, _Alloc& __two) _GLIBCXX_NOEXCEPT
      {
	// Precondition: swappable allocators.
	if (__one != __two)
	  swap(__one, __two);
      }
    };

// Optimize for stateless allocators.
  template<typename _Alloc, bool = __is_empty(_Alloc)>
    struct __alloc_neq
    {
      static bool
      _S_do_it(const _Alloc&, const _Alloc&)
      { return false; }
    };

template<typename _Alloc>
    struct __alloc_neq<_Alloc, false>
    {
      static bool
      _S_do_it(const _Alloc& __one, const _Alloc& __two)
      { return __one != __two; }
    };

#if __cplusplus >= 201103L
  template<typename _Tp, bool
    = __or_<is_copy_constructible<typename _Tp::value_type>,
            is_nothrow_move_constructible<typename _Tp::value_type>>::value>
    struct __shrink_to_fit_aux
    { static bool _S_do_it(_Tp&) noexcept { return false; } };

template<typename _Tp>
    struct __shrink_to_fit_aux<_Tp, true>
    {
      static bool
      _S_do_it(_Tp& __c) noexcept
      {
#if __cpp_exceptions
	try
	  {
	    _Tp(__make_move_if_noexcept_iterator(__c.begin()),
		__make_move_if_noexcept_iterator(__c.end()),
		__c.get_allocator()).swap(__c);
	    return true;
	  }
	catch(...)
	  { return false; }
#else
	return false;
#endif
      }
    };
#endif

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif

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