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A few more comments in boost::hash.

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[SVN r54139]
This commit is contained in:
Daniel James
2009-06-21 09:41:11 +00:00
parent 48db3ff569
commit ac31c7e33c
2 changed files with 38 additions and 3 deletions
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17
include/boost/functional/hash/extensions.hpp
View File

@@ -17,6 +17,12 @@
namespace boost
{
//
// call_hash_impl
//
// On compilers without function template ordering, this deals with arrays.
#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
namespace hash_detail
{
@@ -61,6 +67,11 @@ namespace boost
}
#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
//
// boost::hash
//
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template <class T> struct hash
@@ -94,7 +105,7 @@ namespace boost
// On compilers without partial specialization, boost::hash<T>
// has already been declared to deal with pointers, so just
// need to supply the non-pointer version.
// need to supply the non-pointer version of hash_impl.
namespace hash_detail
{
@@ -126,8 +137,8 @@ namespace boost
#else // Visual C++ 6.5
// There's probably a more elegant way to Visual C++ 6.5 to work
// but I don't know what it is.
// Visual C++ 6.5 has problems with nested member functions and
// applying const to const types in templates. So we get this:
template <bool IsConst>
struct hash_impl_msvc

24
include/boost/functional/hash/hash.hpp
View File

@@ -378,6 +378,18 @@ namespace boost
//
// 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 copy.
//
// These are undefined later.
#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
#define BOOST_HASH_SPECIALIZE(type) \
@@ -465,7 +477,10 @@ namespace boost
#undef BOOST_HASH_SPECIALIZE
#undef BOOST_HASH_SPECIALIZE_REF
// Specializing boost::hash for pointers.
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template <class T>
struct hash<T*>
: public std::unary_function<T*, std::size_t>
@@ -482,7 +497,15 @@ namespace boost
#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>
@@ -515,6 +538,7 @@ namespace boost
::BOOST_NESTED_TEMPLATE inner<T>
{
};
#endif
}