Change Log

Use declarations for standard classes, so that the library doesn't need to include all of their headers
Deprecated the <boost/functional/hash/*.hpp> headers. Now a single header, <boost/functional/hash.hpp> is used.
Add support for the BOOST_HASH_NO_EXTENSIONS macro, which disables the extensions to TR1.
Minor improvements to the hash functions for floating point numbers.
Update the portable example to hopefully be more generally portable.

Support for long long, std::complex.
Improved algorithm for hashing floating point numbers:
- Improved portablity, as described by Daniel Krügler in a post to the boost users list.
- Fits more information into each combine loop, which can reduce the the number of times combine is called and hopefully give a better quality hash function.
- Improved the algorithm for hashing floating point numbers.
- On Cygwin use a binary hash function for floating point numbers, as Cygwin doesn't have decent floating point functions for long double.
- Never uses fpclass which doesn't support long double.
- Ticket 1064: Removed unnecessary use of errno.
Explicitly overload for more built in types.
Minor improvements to the documentation.
A few bug and warning fixes:
- Ticket 1509: Suppress another Visual C++ warning.
- Some workarounds for the Sun compilers.

Ticket 2264: In Visual C++, always use C99 float functions for long double and float as the C++ overloads aren't always availables.

Changed the warnings in the deprecated headers from 1.34.0 to errors. These will be removed in a future version of Boost.
Moved detail headers out of boost/functional/detail, since they are part of functional/hash, not functional. boost/functional/detail/container_fwd.hpp has been moved to boost/detail/container_fwd.hpp as it's used outside of this library, the others have been moved to boost/functional/hash/detail.

Move the hash_fwd.hpp implementation into the hash subdirectory, leaving a forwarding header in the old location. You should still use the old location, the new location is mainly for implementation and possible modularization.
Ticket 2412: Removed deprecated headers.
Ticket 2957: Fix configuration for vxworks.

Automatically configure the float functions using template metaprogramming instead of trying to configure every possibility manually.
Workaround for when STLport doesn't support long double.

Ticket 3866: Don't foward declare containers when using gcc's parallel library, allow user to stop forward declaration by defining the BOOST_DETAIL_NO_CONTAINER_FWD macro.
Ticket 4038: Avoid hashing 0.5 and 0 to the same number.
Stop using deprecated BOOST_HAS_* macros.

Add option to prevent implicit conversions when calling hash_value by defining BOOST_HASH_NO_IMPLICIT_CASTS. When using boost::hash for a type that does not have hash_value declared but does have an implicit conversion to a type that does, it would use that implicit conversion to hash it. Which can sometimes go very wrong, e.g. using a conversion to bool and only hashing to 2 possible values. Since fixing this is a breaking change and was only approached quite late in the release cycle with little discussion it's opt-in for now. This, or something like it, will become the default in a future version.