Squashed 'third_party/boostorg/container_hash/' content from commit 9fbda1a
Change-Id: I3db45eeb90d6b7e18fb95c2df04c0afc15541790
git-subtree-dir: third_party/boostorg/container_hash
git-subtree-split: 9fbda1a98a32498c52a1c8ebf62311bb36a44ad4
diff --git a/include/boost/container_hash/hash.hpp b/include/boost/container_hash/hash.hpp
new file mode 100644
index 0000000..76de793
--- /dev/null
+++ b/include/boost/container_hash/hash.hpp
@@ -0,0 +1,761 @@
+
+// Copyright 2005-2014 Daniel James.
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// Based on Peter Dimov's proposal
+// http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1756.pdf
+// issue 6.18.
+//
+// This also contains public domain code from MurmurHash. From the
+// MurmurHash header:
+
+// MurmurHash3 was written by Austin Appleby, and is placed in the public
+// domain. The author hereby disclaims copyright to this source code.
+
+#if !defined(BOOST_FUNCTIONAL_HASH_HASH_HPP)
+#define BOOST_FUNCTIONAL_HASH_HASH_HPP
+
+#include <boost/container_hash/hash_fwd.hpp>
+#include <functional>
+#include <boost/container_hash/detail/hash_float.hpp>
+#include <string>
+#include <boost/limits.hpp>
+#include <boost/type_traits/is_enum.hpp>
+#include <boost/type_traits/is_integral.hpp>
+#include <boost/core/enable_if.hpp>
+#include <boost/cstdint.hpp>
+
+#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+#include <boost/type_traits/is_pointer.hpp>
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
+#include <typeindex>
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+#include <system_error>
+#endif
+
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+
+#if BOOST_MSVC >= 1400
+#pragma warning(disable:6295) // Ill-defined for-loop : 'unsigned int' values
+ // are always of range '0' to '4294967295'.
+ // Loop executes infinitely.
+#endif
+
+#endif
+
+#if BOOST_WORKAROUND(__GNUC__, < 3) \
+ && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
+#define BOOST_HASH_CHAR_TRAITS string_char_traits
+#else
+#define BOOST_HASH_CHAR_TRAITS char_traits
+#endif
+
+#if defined(_MSC_VER)
+# define BOOST_FUNCTIONAL_HASH_ROTL32(x, r) _rotl(x,r)
+#else
+# define BOOST_FUNCTIONAL_HASH_ROTL32(x, r) (x << r) | (x >> (32 - r))
+#endif
+
+// Detect whether standard library has C++17 headers
+
+#if !defined(BOOST_HASH_CXX17)
+# if defined(BOOST_MSVC)
+# if defined(_HAS_CXX17) && _HAS_CXX17
+# define BOOST_HASH_CXX17 1
+# endif
+# elif defined(__cplusplus) && __cplusplus >= 201703
+# define BOOST_HASH_CXX17 1
+# endif
+#endif
+
+#if !defined(BOOST_HASH_CXX17)
+# define BOOST_HASH_CXX17 0
+#endif
+
+#if BOOST_HASH_CXX17 && defined(__has_include)
+# if !defined(BOOST_HASH_HAS_STRING_VIEW) && __has_include(<string_view>)
+# define BOOST_HASH_HAS_STRING_VIEW 1
+# endif
+# if !defined(BOOST_HASH_HAS_OPTIONAL) && __has_include(<optional>)
+# define BOOST_HASH_HAS_OPTIONAL 1
+# endif
+# if !defined(BOOST_HASH_HAS_VARIANT) && __has_include(<variant>)
+# define BOOST_HASH_HAS_VARIANT 1
+# endif
+#endif
+
+#if !defined(BOOST_HASH_HAS_STRING_VIEW)
+# define BOOST_HASH_HAS_STRING_VIEW 0
+#endif
+
+#if !defined(BOOST_HASH_HAS_OPTIONAL)
+# define BOOST_HASH_HAS_OPTIONAL 0
+#endif
+
+#if !defined(BOOST_HASH_HAS_VARIANT)
+# define BOOST_HASH_HAS_VARIANT 0
+#endif
+
+#if BOOST_HASH_HAS_STRING_VIEW
+# include <string_view>
+#endif
+
+#if BOOST_HASH_HAS_OPTIONAL
+# include <optional>
+#endif
+
+#if BOOST_HASH_HAS_VARIANT
+# include <variant>
+#endif
+
+namespace boost
+{
+ namespace hash_detail
+ {
+#if defined(_HAS_AUTO_PTR_ETC) && !_HAS_AUTO_PTR_ETC
+ template <typename T>
+ struct hash_base
+ {
+ typedef T argument_type;
+ typedef std::size_t result_type;
+ };
+#else
+ template <typename T>
+ struct hash_base : std::unary_function<T, std::size_t> {};
+#endif
+
+ struct enable_hash_value { typedef std::size_t type; };
+
+ template <typename T> struct basic_numbers {};
+ template <typename T> struct long_numbers;
+ template <typename T> struct ulong_numbers;
+ template <typename T> struct float_numbers {};
+
+ template <> struct basic_numbers<bool> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<char> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<unsigned char> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<signed char> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<short> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<unsigned short> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<int> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<unsigned int> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<long> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct basic_numbers<unsigned long> :
+ boost::hash_detail::enable_hash_value {};
+
+#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+ template <> struct basic_numbers<wchar_t> :
+ boost::hash_detail::enable_hash_value {};
+#endif
+
+#if !defined(BOOST_NO_CXX11_CHAR16_T)
+ template <> struct basic_numbers<char16_t> :
+ boost::hash_detail::enable_hash_value {};
+#endif
+
+#if !defined(BOOST_NO_CXX11_CHAR32_T)
+ template <> struct basic_numbers<char32_t> :
+ boost::hash_detail::enable_hash_value {};
+#endif
+
+ // long_numbers is defined like this to allow for separate
+ // specialization for long_long and int128_type, in case
+ // they conflict.
+ template <typename T> struct long_numbers2 {};
+ template <typename T> struct ulong_numbers2 {};
+ template <typename T> struct long_numbers : long_numbers2<T> {};
+ template <typename T> struct ulong_numbers : ulong_numbers2<T> {};
+
+#if !defined(BOOST_NO_LONG_LONG)
+ template <> struct long_numbers<boost::long_long_type> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct ulong_numbers<boost::ulong_long_type> :
+ boost::hash_detail::enable_hash_value {};
+#endif
+
+#if defined(BOOST_HAS_INT128)
+ template <> struct long_numbers2<boost::int128_type> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct ulong_numbers2<boost::uint128_type> :
+ boost::hash_detail::enable_hash_value {};
+#endif
+
+ template <> struct float_numbers<float> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct float_numbers<double> :
+ boost::hash_detail::enable_hash_value {};
+ template <> struct float_numbers<long double> :
+ boost::hash_detail::enable_hash_value {};
+ }
+
+ template <typename T>
+ typename boost::hash_detail::basic_numbers<T>::type hash_value(T);
+ template <typename T>
+ typename boost::hash_detail::long_numbers<T>::type hash_value(T);
+ template <typename T>
+ typename boost::hash_detail::ulong_numbers<T>::type hash_value(T);
+
+ template <typename T>
+ typename boost::enable_if<boost::is_enum<T>, std::size_t>::type
+ hash_value(T);
+
+#if !BOOST_WORKAROUND(__DMC__, <= 0x848)
+ template <class T> std::size_t hash_value(T* const&);
+#else
+ template <class T> std::size_t hash_value(T*);
+#endif
+
+#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
+ template< class T, unsigned N >
+ std::size_t hash_value(const T (&x)[N]);
+
+ template< class T, unsigned N >
+ std::size_t hash_value(T (&x)[N]);
+#endif
+
+ template <class Ch, class A>
+ std::size_t hash_value(
+ std::basic_string<Ch, std::BOOST_HASH_CHAR_TRAITS<Ch>, A> const&);
+
+#if BOOST_HASH_HAS_STRING_VIEW
+ template <class Ch>
+ std::size_t hash_value(
+ std::basic_string_view<Ch, std::BOOST_HASH_CHAR_TRAITS<Ch> > const&);
+#endif
+
+ template <typename T>
+ typename boost::hash_detail::float_numbers<T>::type hash_value(T);
+
+#if BOOST_HASH_HAS_OPTIONAL
+ template <typename T>
+ std::size_t hash_value(std::optional<T> const&);
+#endif
+
+#if BOOST_HASH_HAS_VARIANT
+ std::size_t hash_value(std::monostate);
+ template <typename... Types>
+ std::size_t hash_value(std::variant<Types...> const&);
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
+ std::size_t hash_value(std::type_index);
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+ std::size_t hash_value(std::error_code const&);
+ std::size_t hash_value(std::error_condition const&);
+#endif
+
+ // Implementation
+
+ namespace hash_detail
+ {
+ template <class T>
+ inline std::size_t hash_value_signed(T val)
+ {
+ const unsigned int size_t_bits = std::numeric_limits<std::size_t>::digits;
+ // ceiling(std::numeric_limits<T>::digits / size_t_bits) - 1
+ const int length = (std::numeric_limits<T>::digits - 1)
+ / static_cast<int>(size_t_bits);
+
+ std::size_t seed = 0;
+ T positive = val < 0 ? -1 - val : val;
+
+ // Hopefully, this loop can be unrolled.
+ for(unsigned int i = length * size_t_bits; i > 0; i -= size_t_bits)
+ {
+ seed ^= (std::size_t) (positive >> i) + (seed<<6) + (seed>>2);
+ }
+ seed ^= (std::size_t) val + (seed<<6) + (seed>>2);
+
+ return seed;
+ }
+
+ template <class T>
+ inline std::size_t hash_value_unsigned(T val)
+ {
+ const unsigned int size_t_bits = std::numeric_limits<std::size_t>::digits;
+ // ceiling(std::numeric_limits<T>::digits / size_t_bits) - 1
+ const int length = (std::numeric_limits<T>::digits - 1)
+ / static_cast<int>(size_t_bits);
+
+ std::size_t seed = 0;
+
+ // Hopefully, this loop can be unrolled.
+ for(unsigned int i = length * size_t_bits; i > 0; i -= size_t_bits)
+ {
+ seed ^= (std::size_t) (val >> i) + (seed<<6) + (seed>>2);
+ }
+ seed ^= (std::size_t) val + (seed<<6) + (seed>>2);
+
+ return seed;
+ }
+
+ template <typename SizeT>
+ inline void hash_combine_impl(SizeT& seed, SizeT value)
+ {
+ seed ^= value + 0x9e3779b9 + (seed<<6) + (seed>>2);
+ }
+
+ inline void hash_combine_impl(boost::uint32_t& h1,
+ boost::uint32_t k1)
+ {
+ const uint32_t c1 = 0xcc9e2d51;
+ const uint32_t c2 = 0x1b873593;
+
+ k1 *= c1;
+ k1 = BOOST_FUNCTIONAL_HASH_ROTL32(k1,15);
+ k1 *= c2;
+
+ h1 ^= k1;
+ h1 = BOOST_FUNCTIONAL_HASH_ROTL32(h1,13);
+ h1 = h1*5+0xe6546b64;
+ }
+
+
+// Don't define 64-bit hash combine on platforms without 64 bit integers,
+// and also not for 32-bit gcc as it warns about the 64-bit constant.
+#if !defined(BOOST_NO_INT64_T) && \
+ !(defined(__GNUC__) && ULONG_MAX == 0xffffffff)
+
+ inline void hash_combine_impl(boost::uint64_t& h,
+ boost::uint64_t k)
+ {
+ const boost::uint64_t m = UINT64_C(0xc6a4a7935bd1e995);
+ const int r = 47;
+
+ k *= m;
+ k ^= k >> r;
+ k *= m;
+
+ h ^= k;
+ h *= m;
+
+ // Completely arbitrary number, to prevent 0's
+ // from hashing to 0.
+ h += 0xe6546b64;
+ }
+
+#endif // BOOST_NO_INT64_T
+ }
+
+ template <typename T>
+ typename boost::hash_detail::basic_numbers<T>::type hash_value(T v)
+ {
+ return static_cast<std::size_t>(v);
+ }
+
+ template <typename T>
+ typename boost::hash_detail::long_numbers<T>::type hash_value(T v)
+ {
+ return hash_detail::hash_value_signed(v);
+ }
+
+ template <typename T>
+ typename boost::hash_detail::ulong_numbers<T>::type hash_value(T v)
+ {
+ return hash_detail::hash_value_unsigned(v);
+ }
+
+ template <typename T>
+ typename boost::enable_if<boost::is_enum<T>, std::size_t>::type
+ hash_value(T v)
+ {
+ return static_cast<std::size_t>(v);
+ }
+
+ // Implementation by Alberto Barbati and Dave Harris.
+#if !BOOST_WORKAROUND(__DMC__, <= 0x848)
+ template <class T> std::size_t hash_value(T* const& v)
+#else
+ template <class T> std::size_t hash_value(T* v)
+#endif
+ {
+#if defined(__VMS) && __INITIAL_POINTER_SIZE == 64
+ // for some reason ptrdiff_t on OpenVMS compiler with
+ // 64 bit is not 64 bit !!!
+ std::size_t x = static_cast<std::size_t>(
+ reinterpret_cast<long long int>(v));
+#else
+ std::size_t x = static_cast<std::size_t>(
+ reinterpret_cast<std::ptrdiff_t>(v));
+#endif
+ return x + (x >> 3);
+ }
+
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+#if BOOST_MSVC <= 1400
+#pragma warning(disable:4267) // 'argument' : conversion from 'size_t' to
+ // 'unsigned int', possible loss of data
+ // A misguided attempt to detect 64-bit
+ // incompatability.
+#endif
+#endif
+
+ template <class T>
+ inline void hash_combine(std::size_t& seed, T const& v)
+ {
+ boost::hash<T> hasher;
+ return boost::hash_detail::hash_combine_impl(seed, hasher(v));
+ }
+
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
+ template <class It>
+ inline std::size_t hash_range(It first, It last)
+ {
+ std::size_t seed = 0;
+
+ for(; first != last; ++first)
+ {
+ hash_combine(seed, *first);
+ }
+
+ return seed;
+ }
+
+ template <class It>
+ inline void hash_range(std::size_t& seed, It first, It last)
+ {
+ for(; first != last; ++first)
+ {
+ hash_combine(seed, *first);
+ }
+ }
+
+#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
+ template <class T>
+ inline std::size_t hash_range(T* first, T* last)
+ {
+ std::size_t seed = 0;
+
+ for(; first != last; ++first)
+ {
+ boost::hash<T> hasher;
+ seed ^= hasher(*first) + 0x9e3779b9 + (seed<<6) + (seed>>2);
+ }
+
+ return seed;
+ }
+
+ template <class T>
+ inline void hash_range(std::size_t& seed, T* first, T* last)
+ {
+ for(; first != last; ++first)
+ {
+ boost::hash<T> hasher;
+ seed ^= hasher(*first) + 0x9e3779b9 + (seed<<6) + (seed>>2);
+ }
+ }
+#endif
+
+#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
+ template< class T, unsigned N >
+ inline std::size_t hash_value(const T (&x)[N])
+ {
+ return hash_range(x, x + N);
+ }
+
+ template< class T, unsigned N >
+ inline std::size_t hash_value(T (&x)[N])
+ {
+ return hash_range(x, x + N);
+ }
+#endif
+
+ template <class Ch, class A>
+ inline std::size_t hash_value(
+ std::basic_string<Ch, std::BOOST_HASH_CHAR_TRAITS<Ch>, A> const& v)
+ {
+ return hash_range(v.begin(), v.end());
+ }
+
+#if BOOST_HASH_HAS_STRING_VIEW
+ template <class Ch>
+ inline std::size_t hash_value(
+ std::basic_string_view<Ch, std::BOOST_HASH_CHAR_TRAITS<Ch> > const& v)
+ {
+ return hash_range(v.begin(), v.end());
+ }
+#endif
+
+ template <typename T>
+ typename boost::hash_detail::float_numbers<T>::type hash_value(T v)
+ {
+ return boost::hash_detail::float_hash_value(v);
+ }
+
+#if BOOST_HASH_HAS_OPTIONAL
+ template <typename T>
+ inline std::size_t hash_value(std::optional<T> const& v) {
+ if (!v) {
+ // Arbitray value for empty optional.
+ return 0x12345678;
+ } else {
+ boost::hash<T> hf;
+ return hf(*v);
+ }
+ }
+#endif
+
+#if BOOST_HASH_HAS_VARIANT
+ inline std::size_t hash_value(std::monostate) {
+ return 0x87654321;
+ }
+
+ template <typename... Types>
+ inline std::size_t hash_value(std::variant<Types...> const& v) {
+ std::size_t seed = 0;
+ hash_combine(seed, v.index());
+ std::visit([&seed](auto&& x) { hash_combine(seed, x); }, v);
+ return seed;
+ }
+#endif
+
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
+ inline std::size_t hash_value(std::type_index v)
+ {
+ return v.hash_code();
+ }
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+ inline std::size_t hash_value(std::error_code const& v) {
+ std::size_t seed = 0;
+ hash_combine(seed, v.value());
+ hash_combine(seed, &v.category());
+ return seed;
+ }
+
+ inline std::size_t hash_value(std::error_condition const& v) {
+ std::size_t seed = 0;
+ hash_combine(seed, v.value());
+ hash_combine(seed, &v.category());
+ return seed;
+ }
+#endif
+
+ //
+ // boost::hash
+ //
+
+ // Define the specializations required by the standard. The general purpose
+ // boost::hash is defined later in extensions.hpp if
+ // BOOST_HASH_NO_EXTENSIONS is not defined.
+
+ // BOOST_HASH_SPECIALIZE - define a specialization for a type which is
+ // passed by copy.
+ //
+ // BOOST_HASH_SPECIALIZE_REF - define a specialization for a type which is
+ // passed by const reference.
+ //
+ // These are undefined later.
+
+#define BOOST_HASH_SPECIALIZE(type) \
+ template <> struct hash<type> \
+ : public boost::hash_detail::hash_base<type> \
+ { \
+ std::size_t operator()(type v) const \
+ { \
+ return boost::hash_value(v); \
+ } \
+ };
+
+#define BOOST_HASH_SPECIALIZE_REF(type) \
+ template <> struct hash<type> \
+ : public boost::hash_detail::hash_base<type> \
+ { \
+ std::size_t operator()(type const& v) const \
+ { \
+ return boost::hash_value(v); \
+ } \
+ };
+
+#define BOOST_HASH_SPECIALIZE_TEMPLATE_REF(type) \
+ struct hash<type> \
+ : public boost::hash_detail::hash_base<type> \
+ { \
+ std::size_t operator()(type const& v) const \
+ { \
+ return boost::hash_value(v); \
+ } \
+ };
+
+ BOOST_HASH_SPECIALIZE(bool)
+ BOOST_HASH_SPECIALIZE(char)
+ BOOST_HASH_SPECIALIZE(signed char)
+ BOOST_HASH_SPECIALIZE(unsigned char)
+#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+ BOOST_HASH_SPECIALIZE(wchar_t)
+#endif
+#if !defined(BOOST_NO_CXX11_CHAR16_T)
+ BOOST_HASH_SPECIALIZE(char16_t)
+#endif
+#if !defined(BOOST_NO_CXX11_CHAR32_T)
+ BOOST_HASH_SPECIALIZE(char32_t)
+#endif
+ BOOST_HASH_SPECIALIZE(short)
+ BOOST_HASH_SPECIALIZE(unsigned short)
+ BOOST_HASH_SPECIALIZE(int)
+ BOOST_HASH_SPECIALIZE(unsigned int)
+ BOOST_HASH_SPECIALIZE(long)
+ BOOST_HASH_SPECIALIZE(unsigned long)
+
+ BOOST_HASH_SPECIALIZE(float)
+ BOOST_HASH_SPECIALIZE(double)
+ BOOST_HASH_SPECIALIZE(long double)
+
+ BOOST_HASH_SPECIALIZE_REF(std::string)
+#if !defined(BOOST_NO_STD_WSTRING) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+ BOOST_HASH_SPECIALIZE_REF(std::wstring)
+#endif
+#if !defined(BOOST_NO_CXX11_CHAR16_T)
+ BOOST_HASH_SPECIALIZE_REF(std::basic_string<char16_t>)
+#endif
+#if !defined(BOOST_NO_CXX11_CHAR32_T)
+ BOOST_HASH_SPECIALIZE_REF(std::basic_string<char32_t>)
+#endif
+
+#if BOOST_HASH_HAS_STRING_VIEW
+ BOOST_HASH_SPECIALIZE_REF(std::string_view)
+# if !defined(BOOST_NO_STD_WSTRING) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+ BOOST_HASH_SPECIALIZE_REF(std::wstring_view)
+# endif
+# if !defined(BOOST_NO_CXX11_CHAR16_T)
+ BOOST_HASH_SPECIALIZE_REF(std::basic_string_view<char16_t>)
+# endif
+# if !defined(BOOST_NO_CXX11_CHAR32_T)
+ BOOST_HASH_SPECIALIZE_REF(std::basic_string_view<char32_t>)
+# endif
+#endif
+
+#if !defined(BOOST_NO_LONG_LONG)
+ BOOST_HASH_SPECIALIZE(boost::long_long_type)
+ BOOST_HASH_SPECIALIZE(boost::ulong_long_type)
+#endif
+
+#if defined(BOOST_HAS_INT128)
+ BOOST_HASH_SPECIALIZE(boost::int128_type)
+ BOOST_HASH_SPECIALIZE(boost::uint128_type)
+#endif
+
+#if BOOST_HASH_HAS_OPTIONAL
+ template <typename T>
+ BOOST_HASH_SPECIALIZE_TEMPLATE_REF(std::optional<T>)
+#endif
+
+#if !defined(BOOST_HASH_HAS_VARIANT)
+ template <typename... T>
+ BOOST_HASH_SPECIALIZE_TEMPLATE_REF(std::variant<T...>)
+ BOOST_HASH_SPECIALIZE(std::monostate)
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
+ BOOST_HASH_SPECIALIZE(std::type_index)
+#endif
+
+#undef BOOST_HASH_SPECIALIZE
+#undef BOOST_HASH_SPECIALIZE_REF
+#undef BOOST_HASH_SPECIALIZE_TEMPLATE_REF
+
+// Specializing boost::hash for pointers.
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+ template <class T>
+ struct hash<T*>
+ : public boost::hash_detail::hash_base<T*>
+ {
+ std::size_t operator()(T* v) const
+ {
+#if !BOOST_WORKAROUND(__SUNPRO_CC, <= 0x590)
+ return boost::hash_value(v);
+#else
+ std::size_t x = static_cast<std::size_t>(
+ reinterpret_cast<std::ptrdiff_t>(v));
+
+ return x + (x >> 3);
+#endif
+ }
+ };
+
+#else
+
+ // For compilers without partial specialization, we define a
+ // boost::hash for all remaining types. But hash_impl is only defined
+ // for pointers in 'extensions.hpp' - so when BOOST_HASH_NO_EXTENSIONS
+ // is defined there will still be a compile error for types not supported
+ // in the standard.
+
+ namespace hash_detail
+ {
+ template <bool IsPointer>
+ struct hash_impl;
+
+ template <>
+ struct hash_impl<true>
+ {
+ template <class T>
+ struct inner
+ : public boost::hash_detail::hash_base<T>
+ {
+ std::size_t operator()(T val) const
+ {
+#if !BOOST_WORKAROUND(__SUNPRO_CC, <= 590)
+ return boost::hash_value(val);
+#else
+ std::size_t x = static_cast<std::size_t>(
+ reinterpret_cast<std::ptrdiff_t>(val));
+
+ return x + (x >> 3);
+#endif
+ }
+ };
+ };
+ }
+
+ template <class T> struct hash
+ : public boost::hash_detail::hash_impl<boost::is_pointer<T>::value>
+ ::BOOST_NESTED_TEMPLATE inner<T>
+ {
+ };
+
+#endif
+}
+
+#undef BOOST_HASH_CHAR_TRAITS
+#undef BOOST_FUNCTIONAL_HASH_ROTL32
+
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
+#endif // BOOST_FUNCTIONAL_HASH_HASH_HPP
+
+// Include this outside of the include guards in case the file is included
+// twice - once with BOOST_HASH_NO_EXTENSIONS defined, and then with it
+// undefined.
+
+#if !defined(BOOST_HASH_NO_EXTENSIONS) \
+ && !defined(BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP)
+#include <boost/container_hash/extensions.hpp>
+#endif