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New hash_append robust container hash function framework:

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* is_contiguous_hashable trait identifies optimizable types
* hash_append() function overloads for basic types:
  - scalars, floats
  - array, C array
  - pair, tuple
  - boost array and tuple (if configured)
* Provided Spooky hash wrapper for use with hash_append
* Use hash_append in hardened_hash and other places
* New Utility meta functions for working with variadics:
  - static_and
  - static_sum
* Added type_name utility function for diagnostics
* hash_metrics suite of functions to evalulate hash functions
* Test suites to measure hash function performance
* Various fixes
This commit is contained in:
Howard Hinnant
2014-03-30 23:17:29 -07:00
committed by Vinnie Falco
parent 6b467e7e59
commit 2ab7cfbf30
17 changed files with 2589 additions and 67 deletions
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24
beast/container/tests/hardened_hash.test.cpp
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@@ -51,10 +51,11 @@ public:
{
}
void
hash_combine (std::size_t& seed) const noexcept
template <class Hasher>
friend void hash_append (Hasher& h, test_user_type_member const& a) noexcept
{
boost::hash_combine (seed, t);
using beast::hash_append;
hash_append (h, a.t);
}
};
@@ -70,12 +71,11 @@ public:
{
}
friend
void
hash_combine (std::size_t& seed,
test_user_type_free const& v) noexcept
template <class Hasher>
friend void hash_append (Hasher& h, test_user_type_free const& a) noexcept
{
boost::hash_combine (seed, v.t);
using beast::hash_append;
hash_append (h, a.t);
}
};
@@ -154,11 +154,11 @@ public:
return &m_vec[0];
}
void
hash_combine (std::size_t& seed) const noexcept
template <class Hasher>
friend void hash_append(Hasher& h, unsigned_integer const& a) noexcept
{
for (std::size_t i (0); i < size; ++i)
boost::hash_combine (seed, m_vec[i]);
using beast::hash_append;
hash_append (h, a.m_vec);
}
friend