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  27 <div class="titlepage"><div><div><h2 class="title" style="clear: both">
  28 <a name="hash.changes"></a><a class="link" href="changes.html" title="Change Log">Change Log</a>
  29 </h2></div></div></div>
  30 <h3>
  31 <a name="hash.changes.h0"></a>
  32       <span class="phrase"><a name="hash.changes.boost_1_33_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_33_0">Boost
  33       1.33.0</a>
  34     </h3>
  35 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
  36           Initial Release
  37         </li></ul></div>
  38 <h3>
  39 <a name="hash.changes.h1"></a>
  40       <span class="phrase"><a name="hash.changes.boost_1_33_1"></a></span><a class="link" href="changes.html#hash.changes.boost_1_33_1">Boost
  41       1.33.1</a>
  42     </h3>
  43 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
  44           Fixed the points example, as pointed out by &#27784;&#24935;&#23792;.
  45         </li></ul></div>
  46 <h3>
  47 <a name="hash.changes.h2"></a>
  48       <span class="phrase"><a name="hash.changes.boost_1_34_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_34_0">Boost
  49       1.34.0</a>
  50     </h3>
  51 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
  52 <li class="listitem">
  53           Use declarations for standard classes, so that the library doesn't need
  54           to include all of their headers
  55         </li>
  56 <li class="listitem">
  57           Deprecated the <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">hash</span><span class="comment">/*.hpp&gt;</span></code> headers. Now a single header,
  58           &lt;<code class="computeroutput"><a class="link" href="reference.html#header.boost.functional.hash_hpp" title="Header &lt;boost/functional/hash.hpp&gt;">boost/functional/hash.hpp</a></code>&gt;
  59           is used.
  60         </li>
  61 <li class="listitem">
  62           Add support for the <code class="computeroutput"><span class="identifier">BOOST_HASH_NO_EXTENSIONS</span></code>
  63           macro, which disables the extensions to TR1.
  64         </li>
  65 <li class="listitem">
  66           Minor improvements to the hash functions for floating point numbers.
  67         </li>
  68 <li class="listitem">
  69           Update the portable example to hopefully be more generally portable.
  70         </li>
  71 </ul></div>
  72 <h3>
  73 <a name="hash.changes.h3"></a>
  74       <span class="phrase"><a name="hash.changes.boost_1_34_1"></a></span><a class="link" href="changes.html#hash.changes.boost_1_34_1">Boost
  75       1.34.1</a>
  76     </h3>
  77 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
  78           <a href="http://svn.boost.org/trac/boost/ticket/952" target="_top">Ticket 952</a>:
  79           Suppress incorrect 64-bit warning on Visual C++.
  80         </li></ul></div>
  81 <h3>
  82 <a name="hash.changes.h4"></a>
  83       <span class="phrase"><a name="hash.changes.boost_1_35_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_35_0">Boost
  84       1.35.0</a>
  85     </h3>
  86 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
  87 <li class="listitem">
  88           Support for <code class="computeroutput"><span class="keyword">long</span> <span class="keyword">long</span></code>,
  89           <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">complex</span></code>.
  90         </li>
  91 <li class="listitem">
  92           Improved algorithm for hashing floating point numbers:
  93           <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
  94 <li class="listitem">
  95                 Improved portablity, as described by Daniel Kr&#252;gler in <a href="http://lists.boost.org/boost-users/2005/08/13418.php" target="_top">a
  96                 post to the boost users list</a>.
  97               </li>
  98 <li class="listitem">
  99                 Fits more information into each combine loop, which can reduce the
 100                 the number of times combine is called and hopefully give a better
 101                 quality hash function.
 102               </li>
 103 <li class="listitem">
 104                 Improved the algorithm for hashing floating point numbers.
 105               </li>
 106 <li class="listitem">
 107                 On Cygwin use a binary hash function for floating point numbers,
 108                 as Cygwin doesn't have decent floating point functions for <code class="computeroutput"><span class="keyword">long</span> <span class="keyword">double</span></code>.
 109               </li>
 110 <li class="listitem">
 111                 Never uses <code class="computeroutput"><span class="identifier">fpclass</span></code>
 112                 which doesn't support <code class="computeroutput"><span class="keyword">long</span>
 113                 <span class="keyword">double</span></code>.
 114               </li>
 115 <li class="listitem">
 116                 <a href="http://svn.boost.org/trac/boost/ticket/1064" target="_top">Ticket 1064</a>:
 117                 Removed unnecessary use of <code class="computeroutput"><span class="identifier">errno</span></code>.
 118               </li>
 119 </ul></div>
 120         </li>
 121 <li class="listitem">
 122           Explicitly overload for more built in types.
 123         </li>
 124 <li class="listitem">
 125           Minor improvements to the documentation.
 126         </li>
 127 <li class="listitem">
 128           A few bug and warning fixes:
 129           <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
 130 <li class="listitem">
 131                 <a href="http://svn.boost.org/trac/boost/ticket/1509" target="_top">Ticket 1509</a>:
 132                 Suppress another Visual C++ warning.
 133               </li>
 134 <li class="listitem">
 135                 Some workarounds for the Sun compilers.
 136               </li>
 137 </ul></div>
 138         </li>
 139 </ul></div>
 140 <h3>
 141 <a name="hash.changes.h5"></a>
 142       <span class="phrase"><a name="hash.changes.boost_1_36_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_36_0">Boost
 143       1.36.0</a>
 144     </h3>
 145 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 146 <li class="listitem">
 147           Stop using OpenBSD's dodgy <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code>.
 148         </li>
 149 <li class="listitem">
 150           Using the boost typedefs for <code class="computeroutput"><span class="keyword">long</span>
 151           <span class="keyword">long</span></code> and <code class="computeroutput"><span class="keyword">unsigned</span>
 152           <span class="keyword">long</span> <span class="keyword">long</span></code>.
 153         </li>
 154 <li class="listitem">
 155           Move the extensions into their own header.
 156         </li>
 157 </ul></div>
 158 <h3>
 159 <a name="hash.changes.h6"></a>
 160       <span class="phrase"><a name="hash.changes.boost_1_37_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_37_0">Boost
 161       1.37.0</a>
 162     </h3>
 163 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
 164           <a href="http://svn.boost.org/trac/boost/ticket/2264" target="_top">Ticket 2264</a>:
 165           In Visual C++, always use C99 float functions for <code class="computeroutput"><span class="keyword">long</span>
 166           <span class="keyword">double</span></code> and <code class="computeroutput"><span class="keyword">float</span></code>
 167           as the C++ overloads aren't always availables.
 168         </li></ul></div>
 169 <h3>
 170 <a name="hash.changes.h7"></a>
 171       <span class="phrase"><a name="hash.changes.boost_1_38_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_38_0">Boost
 172       1.38.0</a>
 173     </h3>
 174 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 175 <li class="listitem">
 176           Changed the warnings in the deprecated headers from 1.34.0 to errors. These
 177           will be removed in a future version of Boost.
 178         </li>
 179 <li class="listitem">
 180           Moved detail headers out of <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">detail</span></code>,
 181           since they are part of functional/hash, not functional. <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">container_fwd</span><span class="special">.</span><span class="identifier">hpp</span></code>
 182           has been moved to <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">container_fwd</span><span class="special">.</span><span class="identifier">hpp</span></code>
 183           as it's used outside of this library, the others have been moved to <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">hash</span><span class="special">/</span><span class="identifier">detail</span></code>.
 184         </li>
 185 </ul></div>
 186 <h3>
 187 <a name="hash.changes.h8"></a>
 188       <span class="phrase"><a name="hash.changes.boost_1_39_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_39_0">Boost
 189       1.39.0</a>
 190     </h3>
 191 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 192 <li class="listitem">
 193           Move the hash_fwd.hpp implementation into the hash subdirectory, leaving
 194           a forwarding header in the old location. You should still use the old location,
 195           the new location is mainly for implementation and possible modularization.
 196         </li>
 197 <li class="listitem">
 198           <a href="https://svn.boost.org/trac/boost/ticket/2412" target="_top">Ticket 2412</a>:
 199           Removed deprecated headers.
 200         </li>
 201 <li class="listitem">
 202           <a href="https://svn.boost.org/trac/boost/ticket/2957" target="_top">Ticket 2957</a>:
 203           Fix configuration for vxworks.
 204         </li>
 205 </ul></div>
 206 <h3>
 207 <a name="hash.changes.h9"></a>
 208       <span class="phrase"><a name="hash.changes.boost_1_40_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_40_0">Boost
 209       1.40.0</a>
 210     </h3>
 211 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 212 <li class="listitem">
 213           Automatically configure the float functions using template metaprogramming
 214           instead of trying to configure every possibility manually.
 215         </li>
 216 <li class="listitem">
 217           Workaround for when STLport doesn't support long double.
 218         </li>
 219 </ul></div>
 220 <h3>
 221 <a name="hash.changes.h10"></a>
 222       <span class="phrase"><a name="hash.changes.boost_1_42_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_42_0">Boost
 223       1.42.0</a>
 224     </h3>
 225 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 226 <li class="listitem">
 227           Reduce the number of warnings for Visual C++ warning level 4.
 228         </li>
 229 <li class="listitem">
 230           Some code formatting changes to fit lines into 80 characters.
 231         </li>
 232 <li class="listitem">
 233           Rename an internal namespace.
 234         </li>
 235 </ul></div>
 236 <h3>
 237 <a name="hash.changes.h11"></a>
 238       <span class="phrase"><a name="hash.changes.boost_1_43_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_43_0">Boost
 239       1.43.0</a>
 240     </h3>
 241 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 242 <li class="listitem">
 243           <a href="https://svn.boost.org/trac/boost/ticket/3866" target="_top">Ticket 3866</a>:
 244           Don't foward declare containers when using gcc's parallel library, allow
 245           user to stop forward declaration by defining the <code class="computeroutput"><span class="identifier">BOOST_DETAIL_NO_CONTAINER_FWD</span></code>
 246           macro.
 247         </li>
 248 <li class="listitem">
 249           <a href="https://svn.boost.org/trac/boost/ticket/4038" target="_top">Ticket 4038</a>:
 250           Avoid hashing 0.5 and 0 to the same number.
 251         </li>
 252 <li class="listitem">
 253           Stop using deprecated <code class="computeroutput"><span class="identifier">BOOST_HAS_</span><span class="special">*</span></code> macros.
 254         </li>
 255 </ul></div>
 256 <h3>
 257 <a name="hash.changes.h12"></a>
 258       <span class="phrase"><a name="hash.changes.boost_1_44_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_44_0">Boost
 259       1.44.0</a>
 260     </h3>
 261 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
 262           Add option to prevent implicit conversions when calling <code class="computeroutput"><span class="identifier">hash_value</span></code>
 263           by defining <code class="computeroutput"><span class="identifier">BOOST_HASH_NO_IMPLICIT_CASTS</span></code>.
 264           When using <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">hash</span></code> for a type that does not have <code class="computeroutput"><span class="identifier">hash_value</span></code> declared but does have an
 265           implicit conversion to a type that does, it would use that implicit conversion
 266           to hash it. Which can sometimes go very wrong, e.g. using a conversion
 267           to bool and only hashing to 2 possible values. Since fixing this is a breaking
 268           change and was only approached quite late in the release cycle with little
 269           discussion it's opt-in for now. This, or something like it, will become
 270           the default in a future version.
 271         </li></ul></div>
 272 <h3>
 273 <a name="hash.changes.h13"></a>
 274       <span class="phrase"><a name="hash.changes.boost_1_46_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_46_0">Boost
 275       1.46.0</a>
 276     </h3>
 277 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
 278           Avoid warning due with gcc's <code class="computeroutput"><span class="special">-</span><span class="identifier">Wconversion</span></code> flag.
 279         </li></ul></div>
 280 <h3>
 281 <a name="hash.changes.h14"></a>
 282       <span class="phrase"><a name="hash.changes.boost_1_50_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_50_0">Boost
 283       1.50.0</a>
 284     </h3>
 285 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 286 <li class="listitem">
 287           <a href="http://svn.boost.org/trac/boost/ticket/6771" target="_top">Ticket 6771</a>:
 288           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>
 289           warning.
 290         </li>
 291 <li class="listitem">
 292           <a href="http://svn.boost.org/trac/boost/ticket/6806" target="_top">Ticket 6806</a>:
 293           Support <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">array</span></code> and <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">tuple</span></code>
 294           when available.
 295         </li>
 296 <li class="listitem">
 297           Add deprecation warning to the long deprecated <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">container_fwd</span><span class="special">.</span><span class="identifier">hpp</span></code>.
 298         </li>
 299 </ul></div>
 300 <h3>
 301 <a name="hash.changes.h15"></a>
 302       <span class="phrase"><a name="hash.changes.boost_1_51_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_51_0">Boost
 303       1.51.0</a>
 304     </h3>
 305 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 306 <li class="listitem">
 307           Support the standard smart pointers.
 308         </li>
 309 <li class="listitem">
 310           <code class="computeroutput"><span class="identifier">hash_value</span></code> now implemented
 311           using SFINAE to avoid implicit casts to built in types when calling it.
 312         </li>
 313 <li class="listitem">
 314           Updated to use the new config macros.
 315         </li>
 316 </ul></div>
 317 <h3>
 318 <a name="hash.changes.h16"></a>
 319       <span class="phrase"><a name="hash.changes.boost_1_52_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_52_0">Boost
 320       1.52.0</a>
 321     </h3>
 322 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 323 <li class="listitem">
 324           Restore <code class="computeroutput"><span class="keyword">enum</span></code> support, which
 325           was accidentally removed in the last version.
 326         </li>
 327 <li class="listitem">
 328           New floating point hasher - will hash the binary representation on more
 329           platforms, which should be faster.
 330         </li>
 331 </ul></div>
 332 <h3>
 333 <a name="hash.changes.h17"></a>
 334       <span class="phrase"><a name="hash.changes.boost_1_53_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_53_0">Boost
 335       1.53.0</a>
 336     </h3>
 337 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 338 <li class="listitem">
 339           Add support for <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">int128_type</span></code> and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">uint128_type</span></code>
 340           where available - currently only <code class="computeroutput"><span class="identifier">__int128</span></code>
 341           and <code class="computeroutput"><span class="keyword">unsigned</span> <span class="identifier">__int128</span></code>
 342           on some versions of gcc.
 343         </li>
 344 <li class="listitem">
 345           On platforms that are known to have the standard floating point functions,
 346           don't use automatic detection - which can break if there are ambiguous
 347           overloads.
 348         </li>
 349 <li class="listitem">
 350           Fix undefined behaviour when using the binary float hash (Thomas Heller).
 351         </li>
 352 </ul></div>
 353 <h3>
 354 <a name="hash.changes.h18"></a>
 355       <span class="phrase"><a name="hash.changes.boost_1_54_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_54_0">Boost
 356       1.54.0</a>
 357     </h3>
 358 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
 359           <a href="https://svn.boost.org/trac/boost/ticket/7957" target="_top">Ticket 7957</a>:
 360           Fixed a typo.
 361         </li></ul></div>
 362 <h3>
 363 <a name="hash.changes.h19"></a>
 364       <span class="phrase"><a name="hash.changes.boost_1_55_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_55_0">Boost
 365       1.55.0</a>
 366     </h3>
 367 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 368 <li class="listitem">
 369           Simplify a SFINAE check so that it will hopefully work on Sun 5.9 (<a href="https://svn.boost.org/trac/boost/ticket/8822" target="_top">#8822</a>).
 370         </li>
 371 <li class="listitem">
 372           Suppress Visual C++ infinite loop warning (<a href="https://svn.boost.org/trac/boost/ticket/8568" target="_top">#8568</a>).
 373         </li>
 374 </ul></div>
 375 <h3>
 376 <a name="hash.changes.h20"></a>
 377       <span class="phrase"><a name="hash.changes.boost_1_56_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_56_0">Boost
 378       1.56.0</a>
 379     </h3>
 380 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 381 <li class="listitem">
 382           Removed some Visual C++ 6 workarounds.
 383         </li>
 384 <li class="listitem">
 385           Ongoing work on improving <code class="computeroutput"><span class="identifier">hash_combine</span></code>.
 386           This changes the combine function which was previously defined in the reference
 387           documentation.
 388         </li>
 389 </ul></div>
 390 <h3>
 391 <a name="hash.changes.h21"></a>
 392       <span class="phrase"><a name="hash.changes.boost_1_58_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_58_0">Boost
 393       1.58.0</a>
 394     </h3>
 395 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
 396           Fixed strict aliasing violation (<a href="https://github.com/boostorg/functional/pull/3" target="_top">GitHub
 397           #3</a>).
 398         </li></ul></div>
 399 <h3>
 400 <a name="hash.changes.h22"></a>
 401       <span class="phrase"><a name="hash.changes.boost_1_63_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_63_0">Boost
 402       1.63.0</a>
 403     </h3>
 404 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 405 <li class="listitem">
 406           Fixed some warnings.
 407         </li>
 408 <li class="listitem">
 409           Only define hash for <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span></code>
 410           when we know we have a <code class="computeroutput"><span class="keyword">wchar_t</span></code>.
 411           Otherwise there's a compile error as there's no overload for hashing the
 412           characters in wide strings (<a href="https://svn.boost.org/trac/boost/ticket/8552" target="_top">#8552</a>).
 413         </li>
 414 </ul></div>
 415 <h3>
 416 <a name="hash.changes.h23"></a>
 417       <span class="phrase"><a name="hash.changes.boost_1_64_0"></a></span><a class="link" href="changes.html#hash.changes.boost_1_64_0">Boost
 418       1.64.0</a>
 419     </h3>
 420 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
 421           Fix for recent versions of Visual C++ which have removed <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">unary_function</span></code> and <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">binary_function</span></code>.
 422         </li></ul></div>
 423 </div>
 424 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 425 <td align="left"></td>
 426 <td align="right"><div class="copyright-footer">Copyright &#169; 2005-2008 Daniel
 427       James<p>
 428         Distributed under the Boost Software License, Version 1.0. (See accompanying
 429         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>)
 430       </p>
 431 </div></td>
 432 </tr></table>
 433 <hr>
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