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- Avoid floating point workarounds on recent standard libraries.
- Support int128.
- Remove container_fwd_0x.hpp.


[SVN r81920]
This commit is contained in:
Daniel James
2012-12-13 22:34:18 +00:00
parent 04321ad5c2 06fe6a9cba
commit e34c9ba9b6
13 changed files with 284 additions and 86 deletions
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include/boost/functional/hash/detail/container_fwd_0x.hpp
-29
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@@ -1,29 +0,0 @@
// Copyright 2012 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)
#if !defined(BOOST_DETAIL_CONTAINER_FWD_0X_HPP)
#define BOOST_DETAIL_CONTAINER_FWD_0X_HPP
#include <boost/detail/container_fwd.hpp>
// std::array
#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
# include <array>
#endif
// std::tuple
#if !defined(BOOST_NO_CXX11_HDR_TUPLE)
# include <tuple>
#endif
// std::shared_ptr/std::unique_ptr
#if !defined(BOOST_NO_CXX11_HDR_MEMORY)
# include <memory>
#endif
#endif
include/boost/functional/hash/detail/float_functions.hpp
+90
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@@ -13,6 +13,94 @@
# pragma once
#endif
// Set BOOST_HASH_CONFORMANT_FLOATS to 1 for libraries known to have
// sufficiently good floating point support to not require any
// workarounds.
//
// When set to 0, the library tries to automatically
// use the best available implementation. This normally works well, but
// breaks when ambiguities are created by odd namespacing of the functions.
//
// Note that if this is set to 0, the library should still take full
// advantage of the platform's floating point support.
#if defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
# define BOOST_HASH_CONFORMANT_FLOATS 0
#elif defined(__LIBCOMO__)
# define BOOST_HASH_CONFORMANT_FLOATS 0
#elif defined(__STD_RWCOMPILER_H__) || defined(_RWSTD_VER)
// Rogue Wave library:
# define BOOST_HASH_CONFORMANT_FLOATS 0
#elif defined(_LIBCPP_VERSION)
// libc++
# define BOOST_HASH_CONFORMANT_FLOATS 1
#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
// GNU libstdc++ 3
# if defined(__GNUC__) && __GNUC__ >= 4
# define BOOST_HASH_CONFORMANT_FLOATS 1
# else
# define BOOST_HASH_CONFORMANT_FLOATS 0
# endif
#elif defined(__STL_CONFIG_H)
// generic SGI STL
# define BOOST_HASH_CONFORMANT_FLOATS 0
#elif defined(__MSL_CPP__)
// MSL standard lib:
# define BOOST_HASH_CONFORMANT_FLOATS 0
#elif defined(__IBMCPP__)
// VACPP std lib (probably conformant for much earlier version).
# if __IBMCPP__ >= 1210
# define BOOST_HASH_CONFORMANT_FLOATS 1
# else
# define BOOST_HASH_CONFORMANT_FLOATS 0
# endif
#elif defined(MSIPL_COMPILE_H)
// Modena C++ standard library
# define BOOST_HASH_CONFORMANT_FLOATS 0
#elif (defined(_YVALS) && !defined(__IBMCPP__)) || defined(_CPPLIB_VER)
// Dinkumware Library (this has to appear after any possible replacement libraries):
# if _CPPLIB_VER >= 405
# define BOOST_HASH_CONFORMANT_FLOATS 1
# else
# define BOOST_HASH_CONFORMANT_FLOATS 0
# endif
#else
# define BOOST_HASH_CONFORMANT_FLOATS 0
#endif
#if BOOST_HASH_CONFORMANT_FLOATS
// The standard library is known to be compliant, so don't use the
// configuration mechanism.
namespace boost {
namespace hash_detail {
template <typename Float>
struct call_ldexp {
typedef Float float_type;
inline Float operator()(Float x, int y) const {
return std::ldexp(x, y);
}
};
template <typename Float>
struct call_frexp {
typedef Float float_type;
inline Float operator()(Float x, int* y) const {
return std::frexp(x, y);
}
};
template <typename Float>
struct select_hash_type
{
typedef Float type;
};
}
}
#else // BOOST_HASH_CONFORMANT_FLOATS == 0
// The C++ standard requires that the C float functions are overloarded
// for float, double and long double in the std namespace, but some of the older
// library implementations don't support this. On some that don't, the C99
@@ -243,4 +331,6 @@ namespace boost
}
}
#endif // BOOST_HASH_CONFORMANT_FLOATS
#endif
include/boost/functional/hash/detail/hash_float.hpp
+8 -1
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@@ -210,8 +210,15 @@ namespace boost
template <class T>
inline std::size_t float_hash_value(T v)
{
#if defined(fpclassify)
switch (fpclassify(v))
#elif BOOST_HASH_CONFORMANT_FLOATS
switch (std::fpclassify(v))
#else
using namespace std;
switch (fpclassify(v)) {
switch (fpclassify(v))
#endif
{
case FP_ZERO:
return 0;
case FP_INFINITE:
include/boost/functional/hash/extensions.hpp
+14 -2
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@@ -14,12 +14,24 @@
#define BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP
#include <boost/functional/hash/hash.hpp>
#include <boost/functional/hash/detail/container_fwd_0x.hpp>
#include <boost/detail/container_fwd.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/static_assert.hpp>
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
# include <array>
#endif
#if !defined(BOOST_NO_CXX11_HDR_TUPLE)
# include <tuple>
#endif
#if !defined(BOOST_NO_CXX11_HDR_MEMORY)
# include <memory>
#endif
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
@@ -149,7 +161,7 @@ namespace boost
}
}
#if !defined(BOOST_NO_VARIADIC_TEMPLATES)
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <typename... T>
inline std::size_t hash_value(std::tuple<T...> const& v)
{
include/boost/functional/hash/hash.hpp
+26 -5
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@@ -16,6 +16,7 @@
#include <string>
#include <boost/limits.hpp>
#include <boost/type_traits/is_enum.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/utility/enable_if.hpp>
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
@@ -40,8 +41,8 @@ namespace boost
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 long_numbers;
template <typename T> struct ulong_numbers;
template <typename T> struct float_numbers {};
template <> struct basic_numbers<bool> :
@@ -70,6 +71,14 @@ namespace boost
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 {};
@@ -77,6 +86,13 @@ namespace boost
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> :
@@ -94,7 +110,7 @@ namespace boost
template <typename T>
typename boost::enable_if<boost::is_enum<T>, std::size_t>::type
hash_value(T);
hash_value(T);
#if !BOOST_WORKAROUND(__DMC__, <= 0x848)
template <class T> std::size_t hash_value(T* const&);
@@ -187,9 +203,9 @@ namespace boost
template <typename T>
typename boost::enable_if<boost::is_enum<T>, std::size_t>::type
hash_value(T v)
hash_value(T v)
{
return static_cast<std::size_t>(v);
return static_cast<std::size_t>(v);
}
// Implementation by Alberto Barbati and Dave Harris.
@@ -423,6 +439,11 @@ namespace boost
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 !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
BOOST_HASH_SPECIALIZE(std::type_index)
#endif