FM / bits

/usr/include/c++/8/bits

Name	Size	Mode	Actions
algorithmfwd.h	21736	0644	edit dl rm
allocated_ptr.h	3293	0644	edit dl rm
allocator.h	7569	0644	edit dl rm
alloc_traits.h	20066	0644	edit dl rm
atomic_base.h	23842	0644	edit dl rm
atomic_futex.h	9576	0644	edit dl rm
atomic_lockfree_defines.h	2253	0644	edit dl rm
basic_ios.h	16074	0644	edit dl rm
basic_ios.tcc	6083	0644	edit dl rm
basic_string.h	242697	0644	edit dl rm
basic_string.tcc	53755	0644	edit dl rm
boost_concept_check.h	27161	0644	edit dl rm
c++0x_warning.h	1474	0644	edit dl rm
char_traits.h	20915	0644	edit dl rm
codecvt.h	21289	0644	edit dl rm
concept_check.h	3423	0644	edit dl rm
cpp_type_traits.h	9789	0644	edit dl rm
cxxabi_forced.h	1811	0644	edit dl rm
cxxabi_init_exception.h	2220	0644	edit dl rm
deque.tcc	34122	0644	edit dl rm
enable_special_members.h	12387	0644	edit dl rm
exception.h	2280	0644	edit dl rm
exception_defines.h	1645	0644	edit dl rm
exception_ptr.h	5981	0644	edit dl rm
forward_list.h	48919	0644	edit dl rm
forward_list.tcc	13169	0644	edit dl rm
fstream.tcc	32799	0644	edit dl rm
fs_dir.h	14724	0644	edit dl rm
fs_fwd.h	10279	0644	edit dl rm
fs_ops.h	9730	0644	edit dl rm
fs_path.h	32894	0644	edit dl rm
functexcept.h	3254	0644	edit dl rm
functional_hash.h	8238	0644	edit dl rm
gslice.h	5518	0644	edit dl rm
gslice_array.h	7769	0644	edit dl rm
hashtable.h	73785	0644	edit dl rm
hashtable_policy.h	67971	0644	edit dl rm
hash_bytes.h	2146	0644	edit dl rm
indirect_array.h	7861	0644	edit dl rm
invoke.h	3657	0644	edit dl rm
ios_base.h	31023	0644	edit dl rm
istream.tcc	31093	0644	edit dl rm
list.tcc	15976	0644	edit dl rm
localefwd.h	5646	0644	edit dl rm
locale_classes.h	24897	0644	edit dl rm
locale_classes.tcc	8375	0644	edit dl rm
locale_conv.h	16097	0644	edit dl rm
locale_facets.h	92328	0644	edit dl rm
locale_facets.tcc	39548	0644	edit dl rm
locale_facets_nonio.h	68980	0644	edit dl rm
locale_facets_nonio.tcc	45280	0644	edit dl rm
mask_array.h	7595	0644	edit dl rm
memoryfwd.h	2453	0644	edit dl rm
move.h	6529	0644	edit dl rm
nested_exception.h	4802	0644	edit dl rm
node_handle.h	8216	0644	edit dl rm
ostream.tcc	12315	0644	edit dl rm
ostream_insert.h	4002	0644	edit dl rm
parse_numbers.h	7944	0644	edit dl rm
postypes.h	8208	0644	edit dl rm
predefined_ops.h	9083	0644	edit dl rm
ptr_traits.h	6626	0644	edit dl rm
quoted_string.h	5053	0644	edit dl rm
random.h	175250	0644	edit dl rm
random.tcc	105590	0644	edit dl rm
range_access.h	10030	0644	edit dl rm
refwrap.h	11884	0644	edit dl rm
regex.h	97402	0644	edit dl rm
regex.tcc	16565	0644	edit dl rm
regex_automaton.h	10722	0644	edit dl rm
regex_automaton.tcc	7838	0644	edit dl rm
regex_compiler.h	18050	0644	edit dl rm
regex_compiler.tcc	19288	0644	edit dl rm
regex_constants.h	14708	0644	edit dl rm
regex_error.h	4904	0644	edit dl rm
regex_executor.h	7488	0644	edit dl rm
regex_executor.tcc	18841	0644	edit dl rm
regex_scanner.h	7088	0644	edit dl rm
regex_scanner.tcc	15009	0644	edit dl rm
shared_ptr.h	23433	0644	edit dl rm
shared_ptr_atomic.h	9769	0644	edit dl rm
shared_ptr_base.h	54286	0644	edit dl rm
slice_array.h	9348	0644	edit dl rm
specfun.h	47051	0644	edit dl rm
sstream.tcc	10142	0644	edit dl rm
std_abs.h	3266	0644	edit dl rm
std_function.h	23260	0644	edit dl rm
std_mutex.h	9298	0644	edit dl rm
stl_algo.h	214294	0644	edit dl rm
stl_algobase.h	50494	0644	edit dl rm
stl_bvector.h	33728	0644	edit dl rm
stl_construct.h	7397	0644	edit dl rm
stl_deque.h	78575	0644	edit dl rm
stl_function.h	41745	0644	edit dl rm
stl_heap.h	20206	0644	edit dl rm
stl_iterator.h	42291	0644	edit dl rm
stl_iterator_base_funcs.h	8178	0644	edit dl rm
stl_iterator_base_types.h	8680	0644	edit dl rm
stl_list.h	67558	0644	edit dl rm
stl_map.h	52791	0644	edit dl rm
stl_multimap.h	41557	0644	edit dl rm
stl_multiset.h	35809	0644	edit dl rm
stl_numeric.h	13832	0644	edit dl rm
stl_pair.h	18642	0644	edit dl rm
stl_queue.h	24073	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	36125	0644	edit dl rm
stl_stack.h	11938	0644	edit dl rm
stl_tempbuf.h	8344	0644	edit dl rm
stl_tree.h	74904	0644	edit dl rm
stl_uninitialized.h	27709	0644	edit dl rm
stl_vector.h	60534	0644	edit dl rm
streambuf.tcc	4929	0644	edit dl rm
streambuf_iterator.h	13758	0644	edit dl rm
stream_iterator.h	6654	0644	edit dl rm
stringfwd.h	2607	0644	edit dl rm
string_view.tcc	6698	0644	edit dl rm
uniform_int_dist.h	10081	0644	edit dl rm
unique_ptr.h	25984	0644	edit dl rm
unordered_map.h	75341	0644	edit dl rm
unordered_set.h	59148	0644	edit dl rm
uses_allocator.h	6525	0644	edit dl rm
valarray_after.h	22655	0644	edit dl rm
valarray_array.h	21807	0644	edit dl rm
valarray_array.tcc	7254	0644	edit dl rm
valarray_before.h	18513	0644	edit dl rm
vector.tcc	29644	0644	edit dl rm

Edit: /usr/include/c++/8/bits/uses_allocator.h (6525B)

// Uses-allocator Construction -*- C++ -*-

// Copyright (C) 2010-2018 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/>.

#ifndef _USES_ALLOCATOR_H
#define _USES_ALLOCATOR_H 1

#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else

#include <type_traits>
#include <bits/move.h>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

struct __erased_type { };

template<typename _Alloc, typename _Tp>
    using __is_erased_or_convertible
      = __or_<is_same<_Tp, __erased_type>, is_convertible<_Alloc, _Tp>>;

/// [allocator.tag]
  struct allocator_arg_t { explicit allocator_arg_t() = default; };

_GLIBCXX17_INLINE constexpr allocator_arg_t allocator_arg =
    allocator_arg_t();

template<typename _Tp, typename _Alloc, typename = __void_t<>>
    struct __uses_allocator_helper
    : false_type { };

template<typename _Tp, typename _Alloc>
    struct __uses_allocator_helper<_Tp, _Alloc,
				   __void_t<typename _Tp::allocator_type>>
    : __is_erased_or_convertible<_Alloc, typename _Tp::allocator_type>::type
    { };

/// [allocator.uses.trait]
  template<typename _Tp, typename _Alloc>
    struct uses_allocator
    : __uses_allocator_helper<_Tp, _Alloc>::type
    { };

struct __uses_alloc_base { };

struct __uses_alloc0 : __uses_alloc_base
  {
    struct _Sink { void operator=(const void*) { } } _M_a;
  };

template<typename _Alloc>
    struct __uses_alloc1 : __uses_alloc_base { const _Alloc* _M_a; };

template<typename _Alloc>
    struct __uses_alloc2 : __uses_alloc_base { const _Alloc* _M_a; };

template<bool, typename _Tp, typename _Alloc, typename... _Args>
    struct __uses_alloc;

template<typename _Tp, typename _Alloc, typename... _Args>
    struct __uses_alloc<true, _Tp, _Alloc, _Args...>
    : conditional<
        is_constructible<_Tp, allocator_arg_t, const _Alloc&, _Args...>::value,
        __uses_alloc1<_Alloc>,
       	__uses_alloc2<_Alloc>>::type
    {
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2586. Wrong value category used in scoped_allocator_adaptor::construct
      static_assert(__or_<
	  is_constructible<_Tp, allocator_arg_t, const _Alloc&, _Args...>,
	  is_constructible<_Tp, _Args..., const _Alloc&>>::value,
	  "construction with an allocator must be possible"
	  " if uses_allocator is true");
    };

template<typename _Tp, typename _Alloc, typename... _Args>
    struct __uses_alloc<false, _Tp, _Alloc, _Args...>
    : __uses_alloc0 { };

template<typename _Tp, typename _Alloc, typename... _Args>
    using __uses_alloc_t =
      __uses_alloc<uses_allocator<_Tp, _Alloc>::value, _Tp, _Alloc, _Args...>;

template<typename _Tp, typename _Alloc, typename... _Args>
    inline __uses_alloc_t<_Tp, _Alloc, _Args...>
    __use_alloc(const _Alloc& __a)
    {
      __uses_alloc_t<_Tp, _Alloc, _Args...> __ret;
      __ret._M_a = std::__addressof(__a);
      return __ret;
    }

template<typename _Tp, typename _Alloc, typename... _Args>
    void
    __use_alloc(const _Alloc&&) = delete;

#if __cplusplus > 201402L
  template <typename _Tp, typename _Alloc>
    inline constexpr bool uses_allocator_v =
      uses_allocator<_Tp, _Alloc>::value;
#endif // C++17

template<template<typename...> class _Predicate,
	   typename _Tp, typename _Alloc, typename... _Args>
    struct __is_uses_allocator_predicate
    : conditional<uses_allocator<_Tp, _Alloc>::value,
      __or_<_Predicate<_Tp, allocator_arg_t, _Alloc, _Args...>,
	    _Predicate<_Tp, _Args..., _Alloc>>,
      _Predicate<_Tp, _Args...>>::type { };

template<typename _Tp, typename _Alloc, typename... _Args>
    struct __is_uses_allocator_constructible
    : __is_uses_allocator_predicate<is_constructible, _Tp, _Alloc, _Args...>
    { };

#if __cplusplus >= 201402L
  template<typename _Tp, typename _Alloc, typename... _Args>
    _GLIBCXX17_INLINE constexpr bool __is_uses_allocator_constructible_v =
      __is_uses_allocator_constructible<_Tp, _Alloc, _Args...>::value;
#endif // C++14

template<typename _Tp, typename _Alloc, typename... _Args>
    struct __is_nothrow_uses_allocator_constructible
    : __is_uses_allocator_predicate<is_nothrow_constructible,
				    _Tp, _Alloc, _Args...>
    { };

#if __cplusplus >= 201402L
  template<typename _Tp, typename _Alloc, typename... _Args>
    _GLIBCXX17_INLINE constexpr bool
    __is_nothrow_uses_allocator_constructible_v =
      __is_nothrow_uses_allocator_constructible<_Tp, _Alloc, _Args...>::value;
#endif // C++14

template<typename _Tp, typename... _Args>
    void __uses_allocator_construct_impl(__uses_alloc0 __a, _Tp* __ptr,
					 _Args&&... __args)
    { ::new ((void*)__ptr) _Tp(std::forward<_Args>(__args)...); }

template<typename _Tp, typename _Alloc, typename... _Args>
    void __uses_allocator_construct_impl(__uses_alloc1<_Alloc> __a, _Tp* __ptr,
					 _Args&&... __args)
    {
      ::new ((void*)__ptr) _Tp(allocator_arg, *__a._M_a,
			       std::forward<_Args>(__args)...);
    }

template<typename _Tp, typename _Alloc, typename... _Args>
    void __uses_allocator_construct_impl(__uses_alloc2<_Alloc> __a, _Tp* __ptr,
					 _Args&&... __args)
    { ::new ((void*)__ptr) _Tp(std::forward<_Args>(__args)..., *__a._M_a); }

template<typename _Tp, typename _Alloc, typename... _Args>
    void __uses_allocator_construct(const _Alloc& __a, _Tp* __ptr,
				    _Args&&... __args)
    {
      __uses_allocator_construct_impl(__use_alloc<_Tp, _Alloc, _Args...>(__a),
				      __ptr, std::forward<_Args>(__args)...);
    }

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif
#endif

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