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Merge Hash. Fixes #8568, Refs #8822.#8822.#8822.

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[SVN r85389]
This commit is contained in:
Daniel James
2013-08-18 09:48:53 +00:00
parent b271abdda3
commit e75e6d7eda
2 changed files with 24 additions and 18 deletions
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31
include/boost/functional/hash/detail/hash_float.hpp
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@ -90,15 +90,20 @@ namespace boost
return seed;
}
template <typename Float, unsigned digits, unsigned max_exponent>
struct enable_binary_hash
{
BOOST_STATIC_CONSTANT(bool, value =
std::numeric_limits<Float>::is_iec559 &&
std::numeric_limits<Float>::digits == digits &&
std::numeric_limits<Float>::radix == 2 &&
std::numeric_limits<Float>::max_exponent == max_exponent);
};
template <typename Float>
inline std::size_t float_hash_impl(Float v,
BOOST_DEDUCED_TYPENAME boost::enable_if_c<
std::numeric_limits<Float>::is_iec559 &&
std::numeric_limits<Float>::digits == 24 &&
std::numeric_limits<Float>::radix == 2 &&
std::numeric_limits<Float>::max_exponent == 128,
int>::type
)
enable_binary_hash<Float, 24, 128>::value, int>::type)
{
return hash_binary((char*) &v, 4);
}
@ -107,12 +112,7 @@ namespace boost
template <typename Float>
inline std::size_t float_hash_impl(Float v,
BOOST_DEDUCED_TYPENAME boost::enable_if_c<
std::numeric_limits<Float>::is_iec559 &&
std::numeric_limits<Float>::digits == 53 &&
std::numeric_limits<Float>::radix == 2 &&
std::numeric_limits<Float>::max_exponent == 1024,
int>::type
)
enable_binary_hash<Float, 53, 1024>::value, int>::type)
{
return hash_binary((char*) &v, 8);
}
@ -120,12 +120,7 @@ namespace boost
template <typename Float>
inline std::size_t float_hash_impl(Float v,
BOOST_DEDUCED_TYPENAME boost::enable_if_c<
std::numeric_limits<Float>::is_iec559 &&
std::numeric_limits<Float>::digits == 64 &&
std::numeric_limits<Float>::radix == 2 &&
std::numeric_limits<Float>::max_exponent == 16384,
int>::type
)
enable_binary_hash<Float, 64, 16384>::value, int>::type)
{
return hash_binary((char*) &v, 10);
}

11
include/boost/functional/hash/hash.hpp
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@ -27,6 +27,13 @@
#include <typeindex>
#endif
#if defined(BOOST_MSVC)
#pragma warning(push)
#pragma warning(disable:6295) // Ill-defined for-loop : 'unsigned int' values
// are always of range '0' to '4294967295'.
// Loop executes infinitely.
#endif
#if BOOST_WORKAROUND(__GNUC__, < 3) \
&& !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
#define BOOST_HASH_CHAR_TRAITS string_char_traits
@ -518,6 +525,10 @@ namespace boost
#undef BOOST_HASH_CHAR_TRAITS
#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