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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="unordered.changes"></a><a class="link" href="changes.html" title="Change Log">Change Log</a>
</h2></div></div></div>
<h3>
<a name="unordered.changes.h0"></a>
<span class="phrase"><a name="unordered.changes.review_version"></a></span><a class="link" href="changes.html#unordered.changes.review_version">Review
Version</a>
</h3>
<p>
Initial review version, for the review conducted from 7th December 2007 to
16th December 2007.
</p>
<h3>
<a name="unordered.changes.h1"></a>
<span class="phrase"><a name="unordered.changes.1_35_0_add_on___31st_march_2008"></a></span><a class="link" href="changes.html#unordered.changes.1_35_0_add_on___31st_march_2008">1.35.0
Add-on - 31st March 2008</a>
</h3>
<p>
Unofficial release uploaded to vault, to be used with Boost 1.35.0. Incorporated
many of the suggestions from the review.
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Improved portability thanks to Boost regression testing.
</li>
<li class="listitem">
Fix lots of typos, and clearer text in the documentation.
</li>
<li class="listitem">
Fix floating point to <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span></code>
conversion when calculating sizes from the max load factor, and use <code class="computeroutput"><span class="keyword">double</span></code> in the calculation for greater accuracy.
</li>
<li class="listitem">
Fix some errors in the examples.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h2"></a>
<span class="phrase"><a name="unordered.changes.boost_1_36_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_36_0">Boost
1.36.0</a>
</h3>
<p>
First official release.
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Rearrange the internals.
</li>
<li class="listitem">
Move semantics - full support when rvalue references are available, emulated
using a cut down version of the Adobe move library when they are not.
</li>
<li class="listitem">
Emplace support when rvalue references and variadic template are available.
</li>
<li class="listitem">
More efficient node allocation when rvalue references and variadic template
are available.
</li>
<li class="listitem">
Added equality operators.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h3"></a>
<span class="phrase"><a name="unordered.changes.boost_1_37_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_37_0">Boost
1.37.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Rename overload of <code class="computeroutput"><span class="identifier">emplace</span></code>
with hint, to <code class="computeroutput"><span class="identifier">emplace_hint</span></code>
as specified in <a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2691.pdf" target="_top">n2691</a>.
</li>
<li class="listitem">
Provide forwarding headers at <code class="computeroutput"><span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">unordered</span><span class="special">/</span><span class="identifier">unordered_map_fwd</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
and <code class="computeroutput"><span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">unordered</span><span class="special">/</span><span class="identifier">unordered_set_fwd</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>.
</li>
<li class="listitem">
Move all the implementation inside <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">unordered</span></code>,
to assist modularization and hopefully make it easier to track changes
in subversion.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h4"></a>
<span class="phrase"><a name="unordered.changes.boost_1_38_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_38_0">Boost
1.38.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Use <a href="../../../libs/utility/swap.html" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">swap</span></code></a>.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/2237" target="_top">Ticket 2237</a>:
Document that the equality and inequality operators are undefined for two
objects if their equality predicates aren't equivalent. Thanks to Daniel
Krügler.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/1710" target="_top">Ticket 1710</a>:
Use a larger prime number list. Thanks to Thorsten Ottosen and Hervé Brönnimann.
</li>
<li class="listitem">
Use <a href="../../../libs/type_traits/doc/html/boost_typetraits/category/alignment.html" target="_top">aligned
storage</a> to store the types. This changes the way the allocator
is used to construct nodes. It used to construct the node with two calls
to the allocator's <code class="computeroutput"><span class="identifier">construct</span></code>
method - once for the pointers and once for the value. It now constructs
the node with a single call to construct and then constructs the value
using in place construction.
</li>
<li class="listitem">
Add support for C++0x initializer lists where they're available (currently
only g++ 4.4 in C++0x mode).
</li>
</ul></div>
<h3>
<a name="unordered.changes.h5"></a>
<span class="phrase"><a name="unordered.changes.boost_1_39_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_39_0">Boost
1.39.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/2756" target="_top">Ticket 2756</a>:
Avoid a warning on Visual C++ 2009.
</li>
<li class="listitem">
Some other minor internal changes to the implementation, tests and documentation.
</li>
<li class="listitem">
Avoid an unnecessary copy in <code class="computeroutput"><span class="keyword">operator</span><span class="special">[]</span></code>.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/2975" target="_top">Ticket 2975</a>:
Fix length of prime number list.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h6"></a>
<span class="phrase"><a name="unordered.changes.boost_1_40_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_40_0">Boost
1.40.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/2975" target="_top">Ticket 2975</a>:
Store the prime list as a preprocessor sequence - so that it will always
get the length right if it changes again in the future.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/1978" target="_top">Ticket 1978</a>:
Implement <code class="computeroutput"><span class="identifier">emplace</span></code> for all
compilers.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/2908" target="_top">Ticket 2908</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3096" target="_top">Ticket 3096</a>:
Some workarounds for old versions of borland, including adding explicit
destructors to all containers.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/3082" target="_top">Ticket 3082</a>:
Disable incorrect Visual C++ warnings.
</li>
<li class="listitem">
Better configuration for C++0x features when the headers aren't available.
</li>
<li class="listitem">
Create less buckets by default.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h7"></a>
<span class="phrase"><a name="unordered.changes.boost_1_41_0___major_update"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_41_0___major_update">Boost
1.41.0 - Major update</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
The original version made heavy use of macros to sidestep some of the older
compilers' poor template support. But since I no longer support those compilers
and the macro use was starting to become a maintenance burden it has been
rewritten to use templates instead of macros for the implementation classes.
</li>
<li class="listitem">
The container objcet is now smaller thanks to using <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">compressed_pair</span></code>
for EBO and a slightly different function buffer - now using a bool instead
of a member pointer.
</li>
<li class="listitem">
Buckets are allocated lazily which means that constructing an empty container
will not allocate any memory.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h8"></a>
<span class="phrase"><a name="unordered.changes.boost_1_42_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_42_0">Boost
1.42.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Support instantiating the containers with incomplete value types.
</li>
<li class="listitem">
Reduced the number of warnings (mostly in tests).
</li>
<li class="listitem">
Improved codegear compatibility.
</li>
<li class="listitem">
<a href="http://svn.boost.org/trac/boost/ticket/3693" target="_top">Ticket 3693</a>:
Add <code class="computeroutput"><span class="identifier">erase_return_void</span></code> as
a temporary workaround for the current <code class="computeroutput"><span class="identifier">erase</span></code>
which can be inefficient because it has to find the next element to return
an iterator.
</li>
<li class="listitem">
Add templated find overload for compatible keys.
</li>
<li class="listitem">
<a href="http://svn.boost.org/trac/boost/ticket/3773" target="_top">Ticket 3773</a>:
Add missing <code class="computeroutput"><span class="identifier">std</span></code> qualifier
to <code class="computeroutput"><span class="identifier">ptrdiff_t</span></code>.
</li>
<li class="listitem">
Some code formatting changes to fit almost all lines into 80 characters.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h9"></a>
<span class="phrase"><a name="unordered.changes.boost_1_43_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_43_0">Boost
1.43.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<a href="http://svn.boost.org/trac/boost/ticket/3966" target="_top">Ticket 3966</a>:
<code class="computeroutput"><span class="identifier">erase_return_void</span></code> is now
<code class="computeroutput"><span class="identifier">quick_erase</span></code>, which is the
<a href="http://home.roadrunner.com/~hinnant/issue_review/lwg-active.html#579" target="_top">current
forerunner for resolving the slow erase by iterator</a>, although there's
a strong possibility that this may change in the future. The old method
name remains for backwards compatibility but is considered deprecated and
will be removed in a future release.
</li>
<li class="listitem">
Use Boost.Exception.
</li>
<li class="listitem">
Stop using deprecated <code class="computeroutput"><span class="identifier">BOOST_HAS_</span><span class="special">*</span></code> macros.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h10"></a>
<span class="phrase"><a name="unordered.changes.boost_1_45_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_45_0">Boost
1.45.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Fix a bug when inserting into an <code class="computeroutput"><span class="identifier">unordered_map</span></code>
or <code class="computeroutput"><span class="identifier">unordered_set</span></code> using
iterators which returns <code class="computeroutput"><span class="identifier">value_type</span></code>
by copy.
</li></ul></div>
<h3>
<a name="unordered.changes.h11"></a>
<span class="phrase"><a name="unordered.changes.boost_1_48_0___major_update"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_48_0___major_update">Boost
1.48.0 - Major update</a>
</h3>
<p>
This is major change which has been converted to use Boost.Move's move emulation,
and be more compliant with the C++11 standard. See the <a class="link" href="compliance.html" title="C++11 Compliance">compliance
section</a> for details.
</p>
<p>
The container now meets C++11's complexity requirements, but to do so uses
a little more memory. This means that <code class="computeroutput"><span class="identifier">quick_erase</span></code>
and <code class="computeroutput"><span class="identifier">erase_return_void</span></code> are no
longer required, they'll be removed in a future version.
</p>
<p>
C++11 support has resulted in some breaking changes:
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Equality comparison has been changed to the C++11 specification. In a container
with equivalent keys, elements in a group with equal keys used to have
to be in the same order to be considered equal, now they can be a permutation
of each other. To use the old behavior define the macro <code class="computeroutput"><span class="identifier">BOOST_UNORDERED_DEPRECATED_EQUALITY</span></code>.
</li>
<li class="listitem">
The behaviour of swap is different when the two containers to be swapped
has unequal allocators. It used to allocate new nodes using the appropriate
allocators, it now swaps the allocators if the allocator has a member structure
<code class="computeroutput"><span class="identifier">propagate_on_container_swap</span></code>,
such that <code class="computeroutput"><span class="identifier">propagate_on_container_swap</span><span class="special">::</span><span class="identifier">value</span></code>
is true.
</li>
<li class="listitem">
Allocator's <code class="computeroutput"><span class="identifier">construct</span></code> and
<code class="computeroutput"><span class="identifier">destroy</span></code> functions are called
with raw pointers, rather than the allocator's <code class="computeroutput"><span class="identifier">pointer</span></code>
type.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">emplace</span></code> used to emulate
the variadic pair constructors that appeared in early C++0x drafts. Since
they were removed it no longer does so. It does emulate the new <code class="computeroutput"><span class="identifier">piecewise_construct</span></code> pair constructors
- only you need to use <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">piecewise_construct</span></code>.
To use the old emulation of the variadic consturctors define <code class="computeroutput"><span class="identifier">BOOST_UNORDERED_DEPRECATED_PAIR_CONSTRUCT</span></code>.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h12"></a>
<span class="phrase"><a name="unordered.changes.boost_1_49_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_49_0">Boost
1.49.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fix warning due to accidental odd assignment.
</li>
<li class="listitem">
Slightly better error messages.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h13"></a>
<span class="phrase"><a name="unordered.changes.boost_1_50_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_50_0">Boost
1.50.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fix equality for <code class="computeroutput"><span class="identifier">unordered_multiset</span></code>
and <code class="computeroutput"><span class="identifier">unordered_multimap</span></code>.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/6857" target="_top">Ticket 6857</a>:
Implement <code class="computeroutput"><span class="identifier">reserve</span></code>.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/6771" target="_top">Ticket 6771</a>:
Avoid gcc's <code class="computeroutput"><span class="special">-</span><span class="identifier">Wfloat</span><span class="special">-</span><span class="identifier">equal</span></code>
warning.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/6784" target="_top">Ticket 6784</a>:
Fix some Sun specific code.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/6190" target="_top">Ticket 6190</a>:
Avoid gcc's <code class="computeroutput"><span class="special">-</span><span class="identifier">Wshadow</span></code>
warning.
</li>
<li class="listitem">
<a href="https://svn.boost.org/trac/boost/ticket/6905" target="_top">Ticket 6905</a>:
Make namespaces in macros compatible with <code class="computeroutput"><span class="identifier">bcp</span></code>
custom namespaces. Fixed by Luke Elliott.
</li>
<li class="listitem">
Remove some of the smaller prime number of buckets, as they may make collisions
quite probable (e.g. multiples of 5 are very common because we used base
10).
</li>
<li class="listitem">
On old versions of Visual C++, use the container library's implementation
of <code class="computeroutput"><span class="identifier">allocator_traits</span></code>, as
it's more likely to work.
</li>
<li class="listitem">
On machines with 64 bit std::size_t, use power of 2 buckets, with Thomas
Wang's hash function to pick which one to use. As modulus is very slow
for 64 bit values.
</li>
<li class="listitem">
Some internal changes.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h14"></a>
<span class="phrase"><a name="unordered.changes.boost_1_51_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_51_0">Boost
1.51.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fix construction/destruction issue when using a C++11 compiler with a C++03
allocator (<a href="https://svn.boost.org/trac/boost/ticket/7100" target="_top">#7100</a>).
</li>
<li class="listitem">
Remove a <code class="computeroutput"><span class="keyword">try</span><span class="special">..</span><span class="keyword">catch</span></code> to support compiling without exceptions.
</li>
<li class="listitem">
Adjust SFINAE use to try to supprt g++ 3.4 (<a href="https://svn.boost.org/trac/boost/ticket/7175" target="_top">#7175</a>).
</li>
<li class="listitem">
Updated to use the new config macros.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h15"></a>
<span class="phrase"><a name="unordered.changes.boost_1_52_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_52_0">Boost
1.52.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Faster assign, which assigns to existing nodes where possible, rather than
creating entirely new nodes and copy constructing.
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">erase_range</span></code>
(<a href="https://svn.boost.org/trac/boost/ticket/7471" target="_top">#7471</a>).
</li>
<li class="listitem">
Reverted some of the internal changes to how nodes are created, especially
for C++11 compilers. 'construct' and 'destroy' should work a little better
for C++11 allocators.
</li>
<li class="listitem">
Simplified the implementation a bit. Hopefully more robust.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h16"></a>
<span class="phrase"><a name="unordered.changes.boost_1_53_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_53_0">Boost
1.53.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Remove support for the old pre-standard variadic pair constructors, and
equality implementation. Both have been deprecated since Boost 1.48.
</li>
<li class="listitem">
Remove use of deprecated config macros.
</li>
<li class="listitem">
More internal implementation changes, including a much simpler implementation
of <code class="computeroutput"><span class="identifier">erase</span></code>.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h17"></a>
<span class="phrase"><a name="unordered.changes.boost_1_54_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_54_0">Boost
1.54.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Mark methods specified in standard as <code class="computeroutput"><span class="identifier">noexpect</span></code>.
More to come in the next release.
</li>
<li class="listitem">
If the hash function and equality predicate are known to both have nothrow
move assignment or construction then use them.
</li>
</ul></div>
<h3>
<a name="unordered.changes.h18"></a>
<span class="phrase"><a name="unordered.changes.boost_1_55_0"></a></span><a class="link" href="changes.html#unordered.changes.boost_1_55_0">Boost
1.55.0</a>
</h3>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Avoid some warnings (<a href="https://svn.boost.org/trac/boost/ticket/8851" target="_top">#8851</a>, <a href="https://svn.boost.org/trac/boost/ticket/8874" target="_top">#8874</a>).
</li>
<li class="listitem">
Avoid exposing some detail functions via. ADL on the iterators.
</li>
</ul></div>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2003, 2004 Jeremy B. Maitin-Shepard<br>Copyright © 2005-2008 Daniel
James<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></td>
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