Change Log

Boost 1.33.0

Initial Release

Boost 1.33.1

Fixed the points example, as pointed out by 沈慧峰.

Boost 1.34.0

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.

Boost 1.34.1

Ticket 952: Suppress incorrect 64-bit warning on Visual C++.

Boost 1.35.0

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.

Boost 1.36.0

Stop using OpenBSD's dodgy std::numeric_limits.
Using the boost typedefs for long long and unsigned long long.
Move the extensions into their own header.

Boost 1.37.0

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

Boost 1.38.0

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/container_hash/detail, since they are part of functional/hash, not container_hash. boost/container_hash/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.

Boost 1.39.0

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.

Boost 1.40.0

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.

Boost 1.42.0

Reduce the number of warnings for Visual C++ warning level 4.
Some code formatting changes to fit lines into 80 characters.
Rename an internal namespace.

Boost 1.43.0

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.

Boost 1.44.0

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.

Boost 1.46.0

Avoid warning due with gcc's -Wconversion flag.

Boost 1.50.0

Ticket 6771: Avoid gcc's -Wfloat-equal warning.
Ticket 6806: Support std::array and std::tuple when available.
Add deprecation warning to the long deprecated boost/container_hash/detail/container_fwd.hpp.

Boost 1.51.0

Support the standard smart pointers.
hash_value now implemented using SFINAE to avoid implicit casts to built in types when calling it.
Updated to use the new config macros.

Boost 1.52.0

Restore enum support, which was accidentally removed in the last version.
New floating point hasher - will hash the binary representation on more platforms, which should be faster.

Boost 1.53.0

Add support for boost::int128_type and boost::uint128_type where available - currently only __int128 and unsigned __int128 on some versions of gcc.
On platforms that are known to have the standard floating point functions, don't use automatic detection - which can break if there are ambiguous overloads.
Fix undefined behaviour when using the binary float hash (Thomas Heller).

Boost 1.54.0

Ticket 7957: Fixed a typo.

Boost 1.55.0

Simplify a SFINAE check so that it will hopefully work on Sun 5.9 (#8822).
Suppress Visual C++ infinite loop warning (#8568).

Boost 1.56.0

Removed some Visual C++ 6 workarounds.
Ongoing work on improving hash_combine. This changes the combine function which was previously defined in the reference documentation.

Boost 1.58.0

Fixed strict aliasing violation (GitHub #3).

Boost 1.63.0

Fixed some warnings.
Only define hash for std::wstring when we know we have a wchar_t. Otherwise there's a compile error as there's no overload for hashing the characters in wide strings (#8552).

Boost 1.64.0

Fix for recent versions of Visual C++ which have removed std::unary_function and std::binary_function (#12353).

Boost 1.65.0

Support for char16_t, char32_t, u16string, u32string

Boost 1.66.0

Avoid float comparison warning when using Clang - this workaround was already in place for GCC, and was used when Clang pretends to be GCC, but the warning was appearing when running Clang in other contexts.

Boost 1.67.0

Moved library into its own module, container_hash.
Moved headers for new module name, now at: <boost/container_hash/hash.hpp>, <boost/container_hash/hash_fwd.hpp>, <boost/container_hash/extensions.hpp>.
Added forwarding headers to support the old headers locations.
Support std::string_view, std::error_code, std::error_condition std::optional, std::variant, std::monostate where available.
Update include paths from other Boost libraries.
Manually write out tuple overloads, rather than using the preprocessor to generate them. Should improve usability, due to better error messages, and easier debugging.
Fix tutorial example (#11017).
Quick fix for hashing vector<bool> when using libc++. Will try to introduce a more general fix in the next release.