ceph/src/boost/libs/ptr_container/doc/ptr_multimap_adapter.html

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 287 </style>
 288 </head>
 289 <body>
 290 <div class="document" id="boost-pointer-container-library">
 291 <h1 class="title"><img alt="Boost" src="boost.png" /> Pointer Container Library</h1>
 292 <div class="section">
 293 <h1><a id="class-ptr-multimap-adapter" name="class-ptr-multimap-adapter">Class <tt class="docutils literal"><span class="pre">ptr_multimap_adapter</span></tt></a></h1>
 294 <p>This class is used to build custom pointer containers with
 295 an underlying multimap-like container. The interface of the class is an extension
 296 of the interface from <tt class="docutils literal"><span class="pre">associative_ptr_container</span></tt>.</p>
 297 <p><strong>Hierarchy:</strong></p>
 298 <ul class="simple">
 299 <li><a class="reference" href="reversible_ptr_container.html">reversible_ptr_container</a><ul>
 300 <li><a class="reference" href="associative_ptr_container.html">associative_ptr_container</a><ul>
 301 <li><a class="reference" href="ptr_set_adapter.html">ptr_set_adapter</a></li>
 302 <li><a class="reference" href="ptr_multiset_adapter.html">ptr_multiset_adapter</a></li>
 303 <li><a class="reference" href="ptr_map_adapter.html">ptr_map_adapter</a></li>
 304 <li><tt class="docutils literal"><span class="pre">ptr_multi_map_adapter</span></tt><ul>
 305 <li><a class="reference" href="ptr_set.html">ptr_set</a></li>
 306 <li><a class="reference" href="ptr_multiset.html">ptr_multi_set</a></li>
 307 <li><a class="reference" href="ptr_map.html">ptr_map</a></li>
 308 <li><a class="reference" href="ptr_multimap.html">ptr_multimap</a></li>
 309 </ul>
 310 </li>
 311 </ul>
 312 </li>
 313 </ul>
 314 </li>
 315 </ul>
 316 <p><strong>Navigate:</strong></p>
 317 <ul class="simple">
 318 <li><a class="reference" href="ptr_container.html">home</a></li>
 319 <li><a class="reference" href="reference.html">reference</a></li>
 320 </ul>
 321 <p><strong>Synopsis:</strong></p>
 322 <pre class="literal-block">
 323 namespace boost
 324 {
 325     template
 326     &lt;
 327         T,
 328         class VoidPtrMultiMap,
 329         class CloneAllocator = heap_clone_allocator
 330     &gt;
 331     class ptr_multimap_adapter
 332     {
 333     public: // <a class="reference" href="#typedefs">typedefs</a>
 334         typedef VoidPtrMap::key_type key_type;
 335         typedef T*                   mapped_type;
 336         typedef T&amp;                   mapped_reference;
 337         typedef const T&amp;             const_mapped_reference;
 338         typedef ...                  value_type;
 339         typedef ...                  reference;
 340         typedef ...                  const_reference;
 341         typedef ...                  pointer;
 342         typedef ...                  const_pointer;
 343
 344     public: // <a class="reference" href="#modifiers">modifiers</a>
 345         iterator  insert( key_type&amp; k, T* x );
 346         template&lt; class U &gt;
 347         iterator  insert( const key_type&amp;, std::auto_ptr&lt;U&gt; x );
 348
 349     public: // <a class="reference" href="#pointer-container-requirements">pointer container requirements</a>
 350         void      transfer( iterator object, ptr_multimap_adapter&amp; from );
 351         size_type transfer( iterator first, iterator last, ptr_multimap_adapter&amp; from );
 352         template&lt; class Range &gt;
 353         size_type transfer( const Range&amp; r, ptr_multimap_adapter&amp; from );
 354         void      transfer( ptr_multimap_adapter&amp; from );
 355
 356     }; //  class 'ptr_multimap_adapter'
 357
 358 } // namespace 'boost'
 359 </pre>
 360 </div>
 361 <div class="section">
 362 <h1><a id="semantics" name="semantics">Semantics</a></h1>
 363 <p>. <span class="target" id="typedefs">typedefs</span>:</p>
 364 <div class="section">
 365 <h2><a id="semantics-typedefs" name="semantics-typedefs">Semantics: typedefs</a></h2>
 366 <p>The following types are implementation defined:</p>
 367 <pre class="literal-block">
 368 typedef ... value_type;
 369 typedef ... reference;
 370 typedef ... const_reference;
 371 typedef ... pointer;
 372 typedef ... const_pointer;
 373 </pre>
 374 <p>However, the structure of the type mimics <tt class="docutils literal"><span class="pre">std::pair</span></tt> s.t. one
 375 can use <tt class="docutils literal"><span class="pre">first</span></tt> and <tt class="docutils literal"><span class="pre">second</span></tt> members. The reference-types
 376 are not real references and the pointer-types are not real pointers.
 377 However, one may still write</p>
 378 <pre class="literal-block">
 379 map_type::value_type       a_value      = *m.begin();
 380 a_value.second-&gt;foo();
 381 map_type::reference        a_reference  = *m.begin();
 382 a_reference.second-&gt;foo();
 383 map_type::const_reference  a_creference = *const_begin(m);
 384 map_type::pointer          a_pointer    = &amp;*m.begin();
 385 a_pointer-&gt;second-&gt;foo();
 386 map_type::const_pointer    a_cpointer   = &amp;*const_begin(m);
 387 </pre>
 388 <p>The difference compared to <tt class="docutils literal"><span class="pre">std::map&lt;Key,T*&gt;</span></tt> is that constness
 389 is propagated to the pointer (that is, to <tt class="docutils literal"><span class="pre">second</span></tt>) in <tt class="docutils literal"><span class="pre">const_itertor</span></tt>.</p>
 390 </div>
 391 <div class="section">
 392 <h2><a id="semantics-modifiers" name="semantics-modifiers"><span id="modifiers"></span>Semantics: modifiers</a></h2>
 393 <ul>
 394 <li><p class="first"><tt class="docutils literal"><span class="pre">iterator</span> <span class="pre">insert(</span> <span class="pre">key_type&amp;</span> <span class="pre">k,</span> <span class="pre">T*</span> <span class="pre">x</span> <span class="pre">);</span></tt></p>
 395 <blockquote>
 396 <ul class="simple">
 397 <li>Requirements: <tt class="docutils literal"><span class="pre">x</span> <span class="pre">!=</span> <span class="pre">0</span></tt></li>
 398 <li>Effects: Takes ownership of <tt class="docutils literal"><span class="pre">x</span></tt> and returns an iterator pointing to it.</li>
 399 <li>Throws: bad_pointer if <tt class="docutils literal"><span class="pre">x</span> <span class="pre">==</span> <span class="pre">0</span></tt></li>
 400 <li>Exception safety: Strong guarantee</li>
 401 </ul>
 402 </blockquote>
 403 </li>
 404 <li><p class="first"><tt class="docutils literal"><span class="pre">template&lt;</span> <span class="pre">class</span> <span class="pre">U</span> <span class="pre">&gt;</span> <span class="pre">iterator</span> <span class="pre">insert(</span> <span class="pre">const</span> <span class="pre">key_type&amp;</span> <span class="pre">k,</span> <span class="pre">std::auto_ptr&lt;U&gt;</span> <span class="pre">x</span> <span class="pre">);</span></tt></p>
 405 <blockquote>
 406 <ul class="simple">
 407 <li>Equivalent to (but without the <tt class="docutils literal"><span class="pre">const_cast</span></tt>): <tt class="docutils literal"><span class="pre">return</span> <span class="pre">insert(</span> <span class="pre">const_cast&lt;key_type&amp;&gt;(k),</span> <span class="pre">x.release()</span> <span class="pre">);</span></tt></li>
 408 </ul>
 409 </blockquote>
 410 </li>
 411 </ul>
 412 <!-- - ``iterator insert( key_type& k, const_reference x );``
 413
 414 - Effects: ``return insert( allocate_clone( x ) );``
 415
 416 - Exception safety: Strong guarantee -->
 417 <span class="target" id="lookup"></span><!-- Semantics: lookup
 418 ^^^^^^^^^^^^^^^^^
 419
 420 - ``reference        operator[]( const Key& key );``
 421 - ``const_reference  operator[]( const Key& key ) const;``
 422
 423     - Requirements: the key exists
 424
 425     - Effects: returns the object with key ``key``
 426
 427     - Throws: ``bad_ptr_container_operation`` if the key does not exist                                  -->
 428 </div>
 429 <div class="section">
 430 <h2><a id="semantics-pointer-container-requirements" name="semantics-pointer-container-requirements"><span id="pointer-container-requirements"></span>Semantics: pointer container requirements</a></h2>
 431 <ul>
 432 <li><p class="first"><tt class="docutils literal"><span class="pre">void</span> <span class="pre">transfer(</span> <span class="pre">iterator</span> <span class="pre">object,</span> <span class="pre">ptr_multimap_adapter&amp;</span> <span class="pre">from</span> <span class="pre">);</span></tt></p>
 433 <blockquote>
 434 <ul class="simple">
 435 <li>Requirements: <tt class="docutils literal"><span class="pre">not</span> <span class="pre">from.empty()</span></tt></li>
 436 <li>Effects: Inserts the object defined by <tt class="docutils literal"><span class="pre">object</span></tt> into the container and remove it from <tt class="docutils literal"><span class="pre">from</span></tt>.</li>
 437 <li>Postconditions: <tt class="docutils literal"><span class="pre">size()</span></tt> is one more, <tt class="docutils literal"><span class="pre">from.size()</span></tt> is one less.</li>
 438 <li>Exception safety: Strong guarantee</li>
 439 </ul>
 440 </blockquote>
 441 </li>
 442 <li><p class="first"><tt class="docutils literal"><span class="pre">void</span> <span class="pre">transfer(</span> <span class="pre">iterator</span> <span class="pre">first,</span> <span class="pre">iterator</span> <span class="pre">last,</span> <span class="pre">ptr_multimap_adapter&amp;</span> <span class="pre">from</span> <span class="pre">);</span></tt></p>
 443 <blockquote>
 444 <ul class="simple">
 445 <li>Requirements: <tt class="docutils literal"><span class="pre">not</span> <span class="pre">from.empty()</span></tt></li>
 446 <li>Effects: Inserts the objects defined by the range <tt class="docutils literal"><span class="pre">[first,last)</span></tt> into the container and remove it from <tt class="docutils literal"><span class="pre">from</span></tt>.</li>
 447 <li>Postconditions: Let <tt class="docutils literal"><span class="pre">N</span> <span class="pre">==</span> <span class="pre">std::distance(first,last);</span></tt> then <tt class="docutils literal"><span class="pre">size()</span></tt> is <tt class="docutils literal"><span class="pre">N</span></tt> more, <tt class="docutils literal"><span class="pre">from.size()</span></tt> is <tt class="docutils literal"><span class="pre">N</span></tt> less.</li>
 448 <li>Exception safety: Basic guarantee</li>
 449 </ul>
 450 </blockquote>
 451 </li>
 452 <li><p class="first"><tt class="docutils literal"><span class="pre">template&lt;</span> <span class="pre">class</span> <span class="pre">Range</span> <span class="pre">&gt;</span> <span class="pre">void</span> <span class="pre">transfer(</span> <span class="pre">const</span> <span class="pre">Range&amp;</span> <span class="pre">r,</span> <span class="pre">ptr_multimap_adapter&amp;</span> <span class="pre">from</span> <span class="pre">);</span></tt></p>
 453 <blockquote>
 454 <ul class="simple">
 455 <li>Effects: <tt class="docutils literal"><span class="pre">transfer(</span> <span class="pre">boost::begin(r),</span> <span class="pre">boost::end(r),</span> <span class="pre">from</span> <span class="pre">);</span></tt></li>
 456 </ul>
 457 </blockquote>
 458 </li>
 459 <li><p class="first"><tt class="docutils literal"><span class="pre">void</span> <span class="pre">transfer(</span> <span class="pre">ptr_multimap_adapter&amp;</span> <span class="pre">from</span> <span class="pre">);</span></tt></p>
 460 <blockquote>
 461 <ul class="simple">
 462 <li>Effects: <tt class="docutils literal"><span class="pre">transfer(</span> <span class="pre">from.begin(),</span> <span class="pre">from.end(),</span> <span class="pre">from</span> <span class="pre">);</span></tt>.</li>
 463 <li>Postconditions: <tt class="docutils literal"><span class="pre">from.empty();</span></tt></li>
 464 <li>Exception safety: Basic guarantee</li>
 465 </ul>
 466 </blockquote>
 467 </li>
 468 </ul>
 469 <hr><table class="docutils field-list" frame="void" rules="none">
 470 <col class="field-name" />
 471 <col class="field-body" />
 472 <tbody valign="top">
 473 <tr class="field"><th class="field-name">Copyright:</th><td class="field-body">Thorsten Ottosen 2004-2006. Use, modification and distribution is subject to the Boost Software License, Version 1.0 (see <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">LICENSE_1_0.txt</a>).</td>
 474 </tr>
 475 </tbody>
 476 </table>
 477 </div>
 478 </div>
 479 </div>
 480 </body>
 481 </html>