53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
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////
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Copyright 2022 Peter Dimov
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Distributed under the Boost Software License, Version 1.0.
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https://www.boost.org/LICENSE_1_0.txt
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////
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[#recent]
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= Recent Changes
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:idprefix: recent_
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== Boost 1.82.0
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* Added an overload of `hash_value` for `std::nullptr_t`.
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* Added `is_tuple_like` and an overload of `hash_value` for
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tuple-like types.
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* Changed string hashing to use
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https://github.com/pdimov/mulxp_hash[`mulxp1_hash`],
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improving both quality and speed. This changes the hash values
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for string-like types (ranges of `char`, `signed char`,
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`unsigned char`, `std::byte`, `char8_t`).
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== Boost 1.81.0
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Major update.
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* The specializations of `boost::hash` have been removed; it now
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always calls `hash_value`.
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* Support for `BOOST_HASH_NO_EXTENSIONS` has been removed. The
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extensions are always enabled.
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* All standard containers are now supported. This includes
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`std::forward_list` and the unordered associative containers.
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* User-defined containers (types that have `begin()` and `end()`
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member functions that return iterators) are now supported out
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of the box.
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* Described structs and classes (those annotated with
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`BOOST_DESCRIBE_STRUCT` or `BOOST_DESCRIBE_CLASS`) are now
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supported out of the box.
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* `hash_combine` has been improved. This changes the hash values
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of composite (container and tuple) types and of scalar types
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bigger than `size_t`.
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* The performance (and quality, as a result of the above change)
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of string hashing has been improved. `boost::hash` for strings
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now passes SMHasher in 64 bit mode.
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* The documentation has been substantially revised to reflect
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the changes.
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== Boost 1.78.0
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* Fixed `hash_combine` so that its behavior no longer depends
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on whether `size_t` is the exact same type as `boost::uint64_t`
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(which wasn't the case on macOS). This changes the hash values
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of composite (container and tuple) types on macOS.
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