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algorithmfwd.h	24.17 KB	-rw-r--r--	2025-12-18 20:59
align.h	3.62 KB	-rw-r--r--	2025-12-18 20:59
alloc_traits.h	29.53 KB	-rw-r--r--	2025-12-18 20:59
allocated_ptr.h	3.25 KB	-rw-r--r--	2025-12-18 20:59
allocator.h	8.66 KB	-rw-r--r--	2025-12-18 20:59
atomic_base.h	58.7 KB	-rw-r--r--	2025-12-18 20:59
atomic_futex.h	12.08 KB	-rw-r--r--	2025-12-18 20:59
atomic_lockfree_defines.h	2.3 KB	-rw-r--r--	2025-12-18 20:59
atomic_timed_wait.h	13.18 KB	-rw-r--r--	2025-12-18 20:59
atomic_wait.h	12.41 KB	-rw-r--r--	2025-12-18 20:59
basic_ios.h	15.75 KB	-rw-r--r--	2025-12-18 20:59
basic_ios.tcc	5.67 KB	-rw-r--r--	2025-12-18 20:59
basic_string.h	156.46 KB	-rw-r--r--	2025-12-18 20:59
basic_string.tcc	30.3 KB	-rw-r--r--	2025-12-18 20:59
boost_concept_check.h	29.13 KB	-rw-r--r--	2025-12-18 20:59
c++0x_warning.h	1.44 KB	-rw-r--r--	2025-12-18 20:59
char_traits.h	29.05 KB	-rw-r--r--	2025-12-18 20:59
charconv.h	3.58 KB	-rw-r--r--	2025-12-18 20:59
chrono.h	47.06 KB	-rw-r--r--	2025-12-18 20:59
chrono_io.h	76.97 KB	-rw-r--r--	2025-12-18 20:59
codecvt.h	24.9 KB	-rw-r--r--	2025-12-18 20:59
concept_check.h	3.32 KB	-rw-r--r--	2025-12-18 20:59
cow_string.h	130.97 KB	-rw-r--r--	2025-12-18 20:59
cpp_type_traits.h	14.51 KB	-rw-r--r--	2025-12-18 20:59
cxxabi_forced.h	1.77 KB	-rw-r--r--	2025-12-18 20:59
cxxabi_init_exception.h	2.17 KB	-rw-r--r--	2025-12-18 20:59
deque.tcc	41.38 KB	-rw-r--r--	2025-12-18 20:59
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erase_if.h	2.09 KB	-rw-r--r--	2025-12-18 20:59
exception.h	2.41 KB	-rw-r--r--	2025-12-18 20:59
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forward_list.h	49.92 KB	-rw-r--r--	2025-12-18 20:59
forward_list.tcc	13.71 KB	-rw-r--r--	2025-12-18 20:59
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fs_ops.h	10.49 KB	-rw-r--r--	2025-12-18 20:59
fs_path.h	41.47 KB	-rw-r--r--	2025-12-18 20:59
fstream.tcc	32.64 KB	-rw-r--r--	2025-12-18 20:59
functexcept.h	4.02 KB	-rw-r--r--	2025-12-18 20:59
functional_hash.h	8.79 KB	-rw-r--r--	2025-12-18 20:59
gslice.h	5.39 KB	-rw-r--r--	2025-12-18 20:59
gslice_array.h	7.71 KB	-rw-r--r--	2025-12-18 20:59
hash_bytes.h	2.1 KB	-rw-r--r--	2025-12-18 20:59
hashtable.h	88.71 KB	-rw-r--r--	2025-12-18 20:59
hashtable_policy.h	63.92 KB	-rw-r--r--	2025-12-18 20:59
indirect_array.h	7.72 KB	-rw-r--r--	2025-12-18 20:59
invoke.h	6.08 KB	-rw-r--r--	2025-12-18 20:59
ios_base.h	31.51 KB	-rw-r--r--	2025-12-18 20:59
istream.tcc	31.79 KB	-rw-r--r--	2025-12-18 20:59
iterator_concepts.h	33.72 KB	-rw-r--r--	2025-12-18 20:59
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locale_classes.h	24.79 KB	-rw-r--r--	2025-12-18 20:59
locale_classes.tcc	10.61 KB	-rw-r--r--	2025-12-18 20:59
locale_conv.h	18.74 KB	-rw-r--r--	2025-12-18 20:59
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localefwd.h	5.8 KB	-rw-r--r--	2025-12-18 20:59
mask_array.h	7.77 KB	-rw-r--r--	2025-12-18 20:59
max_size_type.h	22 KB	-rw-r--r--	2025-12-18 20:59
memory_resource.h	15.73 KB	-rw-r--r--	2025-12-18 20:59
memoryfwd.h	2.47 KB	-rw-r--r--	2025-12-18 20:59
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move.h	6.51 KB	-rw-r--r--	2025-12-18 20:59
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nested_exception.h	7.51 KB	-rw-r--r--	2025-12-18 20:59
new_allocator.h	7.27 KB	-rw-r--r--	2025-12-18 20:59
node_handle.h	11.08 KB	-rw-r--r--	2025-12-18 20:59
ostream.tcc	11.83 KB	-rw-r--r--	2025-12-18 20:59
ostream_insert.h	3.98 KB	-rw-r--r--	2025-12-18 20:59
parse_numbers.h	7.8 KB	-rw-r--r--	2025-12-18 20:59
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predefined_ops.h	9.94 KB	-rw-r--r--	2025-12-18 20:59
ptr_traits.h	8.29 KB	-rw-r--r--	2025-12-18 20:59
quoted_string.h	5.01 KB	-rw-r--r--	2025-12-18 20:59
random.h	178.84 KB	-rw-r--r--	2025-12-18 20:59
random.tcc	103.48 KB	-rw-r--r--	2025-12-18 20:59
range_access.h	11.67 KB	-rw-r--r--	2025-12-18 20:59
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ranges_cmp.h	5.9 KB	-rw-r--r--	2025-12-18 20:59
ranges_uninitialized.h	17.71 KB	-rw-r--r--	2025-12-18 20:59
ranges_util.h	24.96 KB	-rw-r--r--	2025-12-18 20:59
refwrap.h	13.27 KB	-rw-r--r--	2025-12-18 20:59
regex.h	104.32 KB	-rw-r--r--	2025-12-18 20:59
regex.tcc	16.1 KB	-rw-r--r--	2025-12-18 20:59
regex_automaton.h	10.55 KB	-rw-r--r--	2025-12-18 20:59
regex_automaton.tcc	7.6 KB	-rw-r--r--	2025-12-18 20:59
regex_compiler.h	15.92 KB	-rw-r--r--	2025-12-18 20:59
regex_compiler.tcc	18.48 KB	-rw-r--r--	2025-12-18 20:59
regex_constants.h	14.54 KB	-rw-r--r--	2025-12-18 20:59
regex_error.h	5.35 KB	-rw-r--r--	2025-12-18 20:59
regex_executor.h	8.81 KB	-rw-r--r--	2025-12-18 20:59
regex_executor.tcc	18.49 KB	-rw-r--r--	2025-12-18 20:59
regex_scanner.h	6.88 KB	-rw-r--r--	2025-12-18 20:59
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requires_hosted.h	1.36 KB	-rw-r--r--	2025-12-18 20:59
semaphore_base.h	7.7 KB	-rw-r--r--	2025-12-18 20:59
shared_ptr.h	38.14 KB	-rw-r--r--	2025-12-18 20:59
shared_ptr_atomic.h	22.79 KB	-rw-r--r--	2025-12-18 20:59
shared_ptr_base.h	65.18 KB	-rw-r--r--	2025-12-18 20:59
slice_array.h	9.39 KB	-rw-r--r--	2025-12-18 20:59
specfun.h	46.07 KB	-rw-r--r--	2025-12-18 20:59
sstream.tcc	9.91 KB	-rw-r--r--	2025-12-18 20:59
std_abs.h	4.63 KB	-rw-r--r--	2025-12-18 20:59
std_function.h	23.12 KB	-rw-r--r--	2025-12-18 20:59
std_mutex.h	6.69 KB	-rw-r--r--	2025-12-18 20:59
std_thread.h	9.84 KB	-rw-r--r--	2025-12-18 20:59
stl_algo.h	212.39 KB	-rw-r--r--	2025-12-18 20:59
stl_algobase.h	74.97 KB	-rw-r--r--	2025-12-18 20:59
stl_bvector.h	41.58 KB	-rw-r--r--	2025-12-18 20:59
stl_construct.h	8.47 KB	-rw-r--r--	2025-12-18 20:59
stl_deque.h	76.34 KB	-rw-r--r--	2025-12-18 20:59
stl_function.h	43.97 KB	-rw-r--r--	2025-12-18 20:59
stl_heap.h	20.31 KB	-rw-r--r--	2025-12-18 20:59
stl_iterator.h	92.81 KB	-rw-r--r--	2025-12-18 20:59
stl_iterator_base_funcs.h	8.75 KB	-rw-r--r--	2025-12-18 20:59
stl_iterator_base_types.h	9.48 KB	-rw-r--r--	2025-12-18 20:59
stl_list.h	70.62 KB	-rw-r--r--	2025-12-18 20:59
stl_map.h	54.86 KB	-rw-r--r--	2025-12-18 20:59
stl_multimap.h	42.71 KB	-rw-r--r--	2025-12-18 20:59
stl_multiset.h	36.87 KB	-rw-r--r--	2025-12-18 20:59
stl_numeric.h	14.25 KB	-rw-r--r--	2025-12-18 20:59
stl_pair.h	36.43 KB	-rw-r--r--	2025-12-18 20:59
stl_queue.h	28.06 KB	-rw-r--r--	2025-12-18 20:59
stl_raw_storage_iter.h	3.91 KB	-rw-r--r--	2025-12-18 20:59
stl_relops.h	4.47 KB	-rw-r--r--	2025-12-18 20:59
stl_set.h	37.13 KB	-rw-r--r--	2025-12-18 20:59
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stl_vector.h	68.88 KB	-rw-r--r--	2025-12-18 20:59
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Rename

// functional_hash.h header -*- C++ -*-

// Copyright (C) 2007-2023 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/>.

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

#ifndef _FUNCTIONAL_HASH_H
#define _FUNCTIONAL_HASH_H 1

#pragma GCC system_header

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

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/** @defgroup hashes Hashes
   *  @ingroup functors
   *
   *   Hashing functors taking a variable type and returning a @c std::size_t.
   *
   *  @{
   */

template<typename _Result, typename _Arg>
    struct __hash_base
    {
      typedef _Result     result_type _GLIBCXX17_DEPRECATED;
      typedef _Arg      argument_type _GLIBCXX17_DEPRECATED;
    };

/// Primary class template hash.
  template<typename _Tp>
    struct hash;

template<typename _Tp, typename = void>
    struct __poison_hash
    {
      static constexpr bool __enable_hash_call = false;
    private:
      // Private rather than deleted to be non-trivially-copyable.
      __poison_hash(__poison_hash&&);
      ~__poison_hash();
    };

template<typename _Tp>
    struct __poison_hash<_Tp, __void_t<decltype(hash<_Tp>()(declval<_Tp>()))>>
    {
      static constexpr bool __enable_hash_call = true;
    };

// Helper struct for SFINAE-poisoning non-enum types.
  template<typename _Tp, bool = is_enum<_Tp>::value>
    struct __hash_enum
    {
    private:
      // Private rather than deleted to be non-trivially-copyable.
      __hash_enum(__hash_enum&&);
      ~__hash_enum();
    };

// Helper struct for hash with enum types.
  template<typename _Tp>
    struct __hash_enum<_Tp, true> : public __hash_base<size_t, _Tp>
    {
      size_t
      operator()(_Tp __val) const noexcept
      {
       using __type = typename underlying_type<_Tp>::type;
       return hash<__type>{}(static_cast<__type>(__val));
      }
    };

/// Primary class template hash, usable for enum types only.
  // Use with non-enum types still SFINAES.
  template<typename _Tp>
    struct hash : __hash_enum<_Tp>
    { };

/// Partial specializations for pointer types.
  template<typename _Tp>
    struct hash<_Tp*> : public __hash_base<size_t, _Tp*>
    {
      size_t
      operator()(_Tp* __p) const noexcept
      { return reinterpret_cast<size_t>(__p); }
    };

// Explicit specializations for integer types.
#define _Cxx_hashtable_define_trivial_hash(_Tp) 	\
  template<>						\
    struct hash<_Tp> : public __hash_base<size_t, _Tp>  \
    {                                                   \
      size_t                                            \
      operator()(_Tp __val) const noexcept              \
      { return static_cast<size_t>(__val); }            \
    };

/// Explicit specialization for bool.
  _Cxx_hashtable_define_trivial_hash(bool)

/// Explicit specialization for char.
  _Cxx_hashtable_define_trivial_hash(char)

/// Explicit specialization for signed char.
  _Cxx_hashtable_define_trivial_hash(signed char)

/// Explicit specialization for unsigned char.
  _Cxx_hashtable_define_trivial_hash(unsigned char)

/// Explicit specialization for wchar_t.
  _Cxx_hashtable_define_trivial_hash(wchar_t)

#ifdef _GLIBCXX_USE_CHAR8_T
  /// Explicit specialization for char8_t.
  _Cxx_hashtable_define_trivial_hash(char8_t)
#endif

/// Explicit specialization for char16_t.
  _Cxx_hashtable_define_trivial_hash(char16_t)

/// Explicit specialization for char32_t.
  _Cxx_hashtable_define_trivial_hash(char32_t)

/// Explicit specialization for short.
  _Cxx_hashtable_define_trivial_hash(short)

/// Explicit specialization for int.
  _Cxx_hashtable_define_trivial_hash(int)

/// Explicit specialization for long.
  _Cxx_hashtable_define_trivial_hash(long)

/// Explicit specialization for long long.
  _Cxx_hashtable_define_trivial_hash(long long)

/// Explicit specialization for unsigned short.
  _Cxx_hashtable_define_trivial_hash(unsigned short)

/// Explicit specialization for unsigned int.
  _Cxx_hashtable_define_trivial_hash(unsigned int)

/// Explicit specialization for unsigned long.
  _Cxx_hashtable_define_trivial_hash(unsigned long)

/// Explicit specialization for unsigned long long.
  _Cxx_hashtable_define_trivial_hash(unsigned long long)

#ifdef __GLIBCXX_TYPE_INT_N_0
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_0)
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_0 unsigned)
#endif
#ifdef __GLIBCXX_TYPE_INT_N_1
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_1)
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_1 unsigned)
#endif
#ifdef __GLIBCXX_TYPE_INT_N_2
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_2)
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_2 unsigned)
#endif
#ifdef __GLIBCXX_TYPE_INT_N_3
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_3)
  __extension__
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_3 unsigned)
#endif

#undef _Cxx_hashtable_define_trivial_hash

struct _Hash_impl
  {
    static size_t
    hash(const void* __ptr, size_t __clength,
	 size_t __seed = static_cast<size_t>(0xc70f6907UL))
    { return _Hash_bytes(__ptr, __clength, __seed); }

template<typename _Tp>
      static size_t
      hash(const _Tp& __val)
      { return hash(&__val, sizeof(__val)); }

template<typename _Tp>
      static size_t
      __hash_combine(const _Tp& __val, size_t __hash)
      { return hash(&__val, sizeof(__val), __hash); }
  };

// A hash function similar to FNV-1a (see PR59406 for how it differs).
  struct _Fnv_hash_impl
  {
    static size_t
    hash(const void* __ptr, size_t __clength,
	 size_t __seed = static_cast<size_t>(2166136261UL))
    { return _Fnv_hash_bytes(__ptr, __clength, __seed); }

template<typename _Tp>
      static size_t
      hash(const _Tp& __val)
      { return hash(&__val, sizeof(__val)); }

template<typename _Tp>
      static size_t
      __hash_combine(const _Tp& __val, size_t __hash)
      { return hash(&__val, sizeof(__val), __hash); }
  };

/// Specialization for float.
  template<>
    struct hash<float> : public __hash_base<size_t, float>
    {
      size_t
      operator()(float __val) const noexcept
      {
	// 0 and -0 both hash to zero.
	return __val != 0.0f ? std::_Hash_impl::hash(__val) : 0;
      }
    };

/// Specialization for double.
  template<>
    struct hash<double> : public __hash_base<size_t, double>
    {
      size_t
      operator()(double __val) const noexcept
      {
	// 0 and -0 both hash to zero.
	return __val != 0.0 ? std::_Hash_impl::hash(__val) : 0;
      }
    };

/// Specialization for long double.
  template<>
    struct hash<long double>
    : public __hash_base<size_t, long double>
    {
      _GLIBCXX_PURE size_t
      operator()(long double __val) const noexcept;
    };

#if __cplusplus >= 201703L
  template<>
    struct hash<nullptr_t> : public __hash_base<size_t, nullptr_t>
    {
      size_t
      operator()(nullptr_t) const noexcept
      { return 0; }
    };
#endif

/// @} group hashes

/** Hint about performance of hash functions.
   *
   * If a given hash function object is not fast, the hash-based containers
   * will cache the hash code.
   * The default behavior is to consider that hashers are fast unless specified
   * otherwise.
   *
   * Users can specialize this for their own hash functions in order to force
   * caching of hash codes in unordered containers. Specializing this trait
   * affects the ABI of the unordered containers, so use it carefully.
   */
  template<typename _Hash>
    struct __is_fast_hash : public std::true_type
    { };

template<>
    struct __is_fast_hash<hash<long double>> : public std::false_type
    { };

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif // _FUNCTIONAL_HASH_H