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algorithmfwd.h	21.03 KB	-rwxrwxrwx	2018-02-14 17:53
alloc_traits.h	19.13 KB	-rwxrwxrwx	2018-02-14 17:53
allocated_ptr.h	3.42 KB	-rwxrwxrwx	2018-02-14 17:53
allocator.h	6.76 KB	-rwxrwxrwx	2018-02-14 17:53
atomic_base.h	23.41 KB	-rwxrwxrwx	2018-02-14 17:53
atomic_futex.h	9.35 KB	-rwxrwxrwx	2018-02-14 17:53
atomic_lockfree_defines.h	2.2 KB	-rwxrwxrwx	2018-02-14 17:53
basic_ios.h	15.7 KB	-rwxrwxrwx	2018-02-14 17:53
basic_ios.tcc	5.89 KB	-rwxrwxrwx	2018-02-14 17:53
basic_string.h	203.81 KB	-rwxrwxrwx	2018-02-14 17:53
basic_string.tcc	50.58 KB	-rwxrwxrwx	2018-02-14 17:53
boost_concept_check.h	26.41 KB	-rwxrwxrwx	2018-02-14 17:53
c++0x_warning.h	1.44 KB	-rwxrwxrwx	2018-02-14 17:53
c++14_warning.h	1.48 KB	-rwxrwxrwx	2018-02-14 17:53
char_traits.h	17.56 KB	-rwxrwxrwx	2018-02-14 17:53
codecvt.h	20.8 KB	-rwxrwxrwx	2018-02-14 17:53
concept_check.h	3.34 KB	-rwxrwxrwx	2018-02-14 17:53
cpp_type_traits.h	9.37 KB	-rwxrwxrwx	2018-02-14 17:53
cxxabi_forced.h	1.77 KB	-rwxrwxrwx	2018-02-14 17:53
deque.tcc	32.89 KB	-rwxrwxrwx	2018-02-14 17:53
enable_special_members.h	10.87 KB	-rwxrwxrwx	2018-02-14 17:53
exception_defines.h	1.61 KB	-rwxrwxrwx	2018-02-14 17:53
exception_ptr.h	5.6 KB	-rwxrwxrwx	2018-02-14 17:53
forward_list.h	47.46 KB	-rwxrwxrwx	2018-02-14 17:53
forward_list.tcc	14.74 KB	-rwxrwxrwx	2018-02-14 17:53
fstream.tcc	32.1 KB	-rwxrwxrwx	2018-02-14 17:53
functexcept.h	3.18 KB	-rwxrwxrwx	2018-02-14 17:53
functional_hash.h	7.49 KB	-rwxrwxrwx	2018-02-14 17:53
gslice.h	5.39 KB	-rwxrwxrwx	2018-02-14 17:53
gslice_array.h	7.59 KB	-rwxrwxrwx	2018-02-14 17:53
hash_bytes.h	2.1 KB	-rwxrwxrwx	2018-02-14 17:53
hashtable.h	67.52 KB	-rwxrwxrwx	2018-02-14 17:53
hashtable_policy.h	62.54 KB	-rwxrwxrwx	2018-02-14 17:53
indirect_array.h	7.68 KB	-rwxrwxrwx	2018-02-14 17:53
ios_base.h	30.22 KB	-rwxrwxrwx	2018-02-14 17:53
istream.tcc	30.21 KB	-rwxrwxrwx	2018-02-14 17:53
list.tcc	15.1 KB	-rwxrwxrwx	2018-02-14 17:53
locale_classes.h	24.31 KB	-rwxrwxrwx	2018-02-14 17:53
locale_classes.tcc	8.18 KB	-rwxrwxrwx	2018-02-14 17:53
locale_conv.h	15.69 KB	-rwxrwxrwx	2018-02-14 17:53
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locale_facets.tcc	38.64 KB	-rwxrwxrwx	2018-02-14 17:53
locale_facets_nonio.h	67.33 KB	-rwxrwxrwx	2018-02-14 17:53
locale_facets_nonio.tcc	44.08 KB	-rwxrwxrwx	2018-02-14 17:53
localefwd.h	5.51 KB	-rwxrwxrwx	2018-02-14 17:53
mask_array.h	7.42 KB	-rwxrwxrwx	2018-02-14 17:53
memoryfwd.h	2.36 KB	-rwxrwxrwx	2018-02-14 17:53
move.h	6.19 KB	-rwxrwxrwx	2018-02-14 17:53
nested_exception.h	4.82 KB	-rwxrwxrwx	2018-02-14 17:53
ostream.tcc	12.03 KB	-rwxrwxrwx	2018-02-14 17:53
ostream_insert.h	3.91 KB	-rwxrwxrwx	2018-02-14 17:53
parse_numbers.h	7.58 KB	-rwxrwxrwx	2018-02-14 17:53
postypes.h	8.02 KB	-rwxrwxrwx	2018-02-14 17:53
predefined_ops.h	7.78 KB	-rwxrwxrwx	2018-02-14 17:53
ptr_traits.h	4.75 KB	-rwxrwxrwx	2018-02-14 17:53
quoted_string.h	4.47 KB	-rwxrwxrwx	2018-02-14 17:53
random.h	169.29 KB	-rwxrwxrwx	2018-02-14 17:53
random.tcc	103.07 KB	-rwxrwxrwx	2018-02-14 17:53
range_access.h	9.32 KB	-rwxrwxrwx	2018-02-14 17:53
regex.h	94.62 KB	-rwxrwxrwx	2018-02-14 17:53
regex.tcc	16.09 KB	-rwxrwxrwx	2018-02-14 17:53
regex_automaton.h	10.43 KB	-rwxrwxrwx	2018-02-14 17:53
regex_automaton.tcc	7.65 KB	-rwxrwxrwx	2018-02-14 17:53
regex_compiler.h	14.42 KB	-rwxrwxrwx	2018-02-14 17:53
regex_compiler.tcc	17.97 KB	-rwxrwxrwx	2018-02-14 17:53
regex_constants.h	13.93 KB	-rwxrwxrwx	2018-02-14 17:53
regex_error.h	4.85 KB	-rwxrwxrwx	2018-02-14 17:53
regex_executor.h	6.61 KB	-rwxrwxrwx	2018-02-14 17:53
regex_executor.tcc	13.9 KB	-rwxrwxrwx	2018-02-14 17:53
regex_scanner.h	6.88 KB	-rwxrwxrwx	2018-02-14 17:53
regex_scanner.tcc	14.6 KB	-rwxrwxrwx	2018-02-14 17:53
shared_ptr.h	19.78 KB	-rwxrwxrwx	2018-02-14 17:53
shared_ptr_atomic.h	9.54 KB	-rwxrwxrwx	2018-02-14 17:53
shared_ptr_base.h	44.6 KB	-rwxrwxrwx	2018-02-14 17:53
slice_array.h	9.13 KB	-rwxrwxrwx	2018-02-14 17:53
specfun.h	44 KB	-rwxrwxrwx	2018-02-14 17:53
sstream.tcc	9.27 KB	-rwxrwxrwx	2018-02-14 17:53
std_mutex.h	9 KB	-rwxrwxrwx	2018-02-14 17:53
stl_algo.h	200.43 KB	-rwxrwxrwx	2018-02-14 17:53
stl_algobase.h	49.22 KB	-rwxrwxrwx	2018-02-14 17:53
stl_bvector.h	32.69 KB	-rwxrwxrwx	2018-02-14 17:53
stl_construct.h	5.05 KB	-rwxrwxrwx	2018-02-14 17:53
stl_deque.h	76.16 KB	-rwxrwxrwx	2018-02-14 17:53
stl_function.h	32.5 KB	-rwxrwxrwx	2018-02-14 17:53
stl_heap.h	18.75 KB	-rwxrwxrwx	2018-02-14 17:53
stl_iterator.h	39.39 KB	-rwxrwxrwx	2018-02-14 17:53
stl_iterator_base_funcs.h	7.69 KB	-rwxrwxrwx	2018-02-14 17:53
stl_iterator_base_types.h	8.45 KB	-rwxrwxrwx	2018-02-14 17:53
stl_list.h	64.03 KB	-rwxrwxrwx	2018-02-14 17:53
stl_map.h	49.45 KB	-rwxrwxrwx	2018-02-14 17:53
stl_multimap.h	37.09 KB	-rwxrwxrwx	2018-02-14 17:53
stl_multiset.h	31.18 KB	-rwxrwxrwx	2018-02-14 17:53
stl_numeric.h	13.51 KB	-rwxrwxrwx	2018-02-14 17:53
stl_pair.h	17.18 KB	-rwxrwxrwx	2018-02-14 17:53
stl_queue.h	20.26 KB	-rwxrwxrwx	2018-02-14 17:53
stl_raw_storage_iter.h	3.74 KB	-rwxrwxrwx	2018-02-14 17:53
stl_relops.h	4.49 KB	-rwxrwxrwx	2018-02-14 17:53
stl_set.h	31.43 KB	-rwxrwxrwx	2018-02-14 17:53
stl_stack.h	10.56 KB	-rwxrwxrwx	2018-02-14 17:53
stl_tempbuf.h	8.15 KB	-rwxrwxrwx	2018-02-14 17:53
stl_tree.h	67.86 KB	-rwxrwxrwx	2018-02-14 17:53
stl_uninitialized.h	21.38 KB	-rwxrwxrwx	2018-02-14 17:53
stl_vector.h	52.4 KB	-rwxrwxrwx	2018-02-14 17:53
stream_iterator.h	6.44 KB	-rwxrwxrwx	2018-02-14 17:53
streambuf.tcc	4.81 KB	-rwxrwxrwx	2018-02-14 17:53
streambuf_iterator.h	12.33 KB	-rwxrwxrwx	2018-02-14 17:53
stringfwd.h	2.55 KB	-rwxrwxrwx	2018-02-14 17:53
uniform_int_dist.h	9.73 KB	-rwxrwxrwx	2018-02-14 17:53
unique_ptr.h	24.36 KB	-rwxrwxrwx	2018-02-14 17:53
unordered_map.h	61.39 KB	-rwxrwxrwx	2018-02-14 17:53
unordered_set.h	47.59 KB	-rwxrwxrwx	2018-02-14 17:53
uses_allocator.h	3.68 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_after.h	22.12 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_array.h	21.23 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_array.tcc	7.08 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_before.h	18.08 KB	-rwxrwxrwx	2018-02-14 17:53
vector.tcc	26.42 KB	-rwxrwxrwx	2018-02-14 17:53

Rename

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

// Copyright (C) 2007-2016 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 <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;
      typedef _Arg      argument_type;
    };

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

// 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)

/// 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
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_0)
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_0 unsigned)
#endif
#ifdef __GLIBCXX_TYPE_INT_N_1
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_1)
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_1 unsigned)
#endif
#ifdef __GLIBCXX_TYPE_INT_N_2
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_2)
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_2 unsigned)
#endif
#ifdef __GLIBCXX_TYPE_INT_N_3
  _Cxx_hashtable_define_trivial_hash(__GLIBCXX_TYPE_INT_N_3)
  _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); }
  };

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;
    };

// @} group hashes

// Hint about performance of hash functor. If not fast the hash-based
  // containers will cache the hash code.
  // Default behavior is to consider that hashers are fast unless specified
  // otherwise.
  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