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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_bimap.reference.bimap_reference"></a><a class="link" href="bimap_reference.html" title="Bimap Reference">Bimap Reference</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.view_concepts">View
        concepts</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.complexity_signature">Complexity
        signature</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.set_type_specification">Set
        type specification</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.tags">Tags</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.header__boost_bimap_bimap_hpp__synopsis">Header
        "boost/bimap/bimap.hpp" synopsis</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap">Class
        template bimap</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.complexity">Complexity</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.instantiation_types">Instantiation
          types</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.nested_types">Nested
          types</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.constructors__copy_and_assignment">Constructors,
          copy and assignment</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.projection_operations">Projection
          operations</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.support_for_user_defined_names">Support
          for user defined names</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.serialization">Serialization</a></span></dt>
</dl></dd>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="boost_bimap.reference.bimap_reference.view_concepts"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.view_concepts" title="View concepts">View
        concepts</a>
</h4></div></div></div>
<p>
          <code class="computeroutput"><span class="identifier">bimap</span></code> instantiations comprise
          two side views and an view of the relation specified at compile time. Each
          view allows read-write access to the elements contained in a definite manner,
          mathing an STL container signature.
        </p>
<p>
          Views are not isolated objects and so cannot be constructed on their own;
          rather they are an integral part of a <code class="computeroutput"><span class="identifier">bimap</span></code>.
          The name of the view class implementation proper is never directly exposed
          to the user, who has access only to the associated view type specifier.
        </p>
<p>
          Insertion and deletion of elements are always performed through the appropriate
          interface of any of the three views of the <code class="computeroutput"><span class="identifier">bimap</span></code>;
          these operations do, however, have an impact on all other views as well:
          for instance, insertion through a given view may fail because there exists
          another view that forbids the operation in order to preserve its invariant
          (such as uniqueness of elements). The global operations performed jointly
          in the any view can be reduced to six primitives:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              copying
            </li>
<li class="listitem">
              insertion of an element
            </li>
<li class="listitem">
              hinted insertion, where a pre-existing element is suggested in order
              to improve the efficiency of the operation
            </li>
<li class="listitem">
              deletion of an element
            </li>
<li class="listitem">
              replacement of the value of an element, which may trigger the rearrangement
              of this element in one or more views, or may forbid the replacement
            </li>
<li class="listitem">
              modification of an element, and its subsequent rearrangement/banning
              by the various views
            </li>
</ul></div>
<p>
          The last two primitives deserve some further explanation: in order to guarantee
          the invariants associated to each view (e.g. some definite ordering) elements
          of a <code class="computeroutput"><span class="identifier">bimap</span></code> are not mutable.
          To overcome this restriction, the views expose member functions for updating
          and modifying, which allows for the mutation of elements in a controlled
          fashion.
        </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="boost_bimap.reference.bimap_reference.complexity_signature"></a><a name="complexity_signature_explanation"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.complexity_signature" title="Complexity signature">Complexity
        signature</a>
</h4></div></div></div>
<p>
          Some member functions of a view interface are implemented by global primitives
          from the above list. The complexity of these operations thus depends on
          all views of a given <code class="computeroutput"><span class="identifier">bimap</span></code>,
          not just the currently used view.
        </p>
<p>
          In order to establish complexity estimates, a view is characterised by
          its complexity signature, consisting of the following associated functions
          on the number of elements:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <code class="computeroutput"><span class="identifier">c</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span></code>:
              copying
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">i</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span></code>:
              insertion
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">h</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span></code>:
              hinted insertion
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">d</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span></code>:
              deletion
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span></code>:
              replacement
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">m</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span></code>:
              modifying
            </li>
</ul></div>
<p>
          If the collection type of the relation is <code class="computeroutput"><span class="identifier">left_based</span></code>
          or <code class="computeroutput"><span class="identifier">right_based</span></code>, and we
          use an <code class="computeroutput"><span class="identifier">l</span></code> subscript to denote
          the left view and an <code class="computeroutput"><span class="identifier">r</span></code>
          for the right view, then the insertion of an element in such a container
          is of complexity <code class="computeroutput"><span class="identifier">O</span><span class="special">(</span><span class="identifier">i_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)+</span><span class="identifier">i_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">))</span></code>,
          where n is the number of elements. If the collection type of relation is
          not side-based, then there is an additional term to add that is contributed
          by the collection type of relation view. Using <code class="computeroutput"><span class="identifier">a</span></code>
          to denote the above view, the complexity of insertion will now be <code class="computeroutput"><span class="identifier">O</span><span class="special">(</span><span class="identifier">i_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)+</span><span class="identifier">i_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)+</span><span class="identifier">i_a</span><span class="special">(</span><span class="identifier">n</span><span class="special">))</span></code>.
          To abbreviate the notation, we adopt the following definitions:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <code class="computeroutput"><span class="identifier">C</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">c_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">c_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">[</span> <span class="special">+</span> <span class="identifier">c_a</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">]</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">I</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">i_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">i_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">[</span> <span class="special">+</span> <span class="identifier">i_a</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">]</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">H</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">h_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">h_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">[</span> <span class="special">+</span> <span class="identifier">h_a</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">]</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">D</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">d_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">d_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">[</span> <span class="special">+</span> <span class="identifier">d_a</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">]</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">R</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">r_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">r_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">[</span> <span class="special">+</span> <span class="identifier">r_a</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">]</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">M</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">m_l</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">m_r</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">[</span> <span class="special">+</span> <span class="identifier">m_a</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">]</span></code>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="boost_bimap.reference.bimap_reference.set_type_specification"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.set_type_specification" title="Set type specification">Set
        type specification</a>
</h4></div></div></div>
<p>
          Set type specifiers are passed as instantiation arguments to <code class="computeroutput"><span class="identifier">bimap</span></code> and provide the information needed
          to incorporate the corresponding views. Currently, Boost.Bimap provides
          the collection type specifiers. The <span class="emphasis"><em>side collection type</em></span>
          specifiers define the constraints of the two map views of the bimap. The
          <span class="emphasis"><em>collection type of relation</em></span> specifier defines the
          main set view constraints. If <code class="computeroutput"><span class="identifier">left_based</span></code>
          (the default parameter) or <code class="computeroutput"><span class="identifier">right_based</span></code>
          is used, then the collection type of relation will be based on the left
          or right collection type correspondingly.
        </p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Side collection type
                  </p>
                </th>
<th>
                  <p>
                    Collection type of relation
                  </p>
                </th>
<th>
                  <p>
                    Include
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">set_of</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">set_of_relation</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">set_of</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">multiset_of</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">multiset_of_relation</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">multiset_of</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">unordered_set_of</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">unordered_set_of_relation</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">unordered_set_of</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">unordered_multiset_of</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">unordered_multiset_of_relation</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">unordered_multiset_of</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">list_of</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">list_of_relation</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">list_of</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">vector_of</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">vector_of_relation</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">vector_of</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">unconstrained_set_of</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">unconstrained_set_of_relation</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">unconstrained_set_of</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">left_based</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
<tr>
<td>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">right_based</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">/</span><span class="identifier">bimap</span><span class="special">.</span><span class="identifier">hpp</span></code>
                  </p>
                </td>
</tr>
</tbody>
</table></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="boost_bimap.reference.bimap_reference.tags"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.tags" title="Tags">Tags</a>
</h4></div></div></div>
<p>
          Tags are just conventional types used as mnemonics for the types stored
          in a <code class="computeroutput"><span class="identifier">bimap</span></code>. Boost.Bimap
          uses the tagged idiom to let the user specify this tags.
        </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="boost_bimap.reference.bimap_reference.header__boost_bimap_bimap_hpp__synopsis"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.header__boost_bimap_bimap_hpp__synopsis" title='Header "boost/bimap/bimap.hpp" synopsis'>Header
        "boost/bimap/bimap.hpp" synopsis</a>
</h4></div></div></div>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">bimaps</span> <span class="special">{</span>

<span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Type</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Tag</span> <span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">tagged</span><span class="special">;</span>

<span class="comment">// bimap template class</span>

<span class="keyword">template</span>
<span class="special">&lt;</span>
    <span class="keyword">class</span> <span class="identifier">LeftCollectionType</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">RightCollectionType</span><span class="special">,</span>

    <span class="keyword">class</span> <span class="identifier">AdditionalParameter_1</span> <span class="special">=</span> <span class="identifier">detail</span><span class="special">::</span><span class="identifier">not_specified</span><span class="special">,</span>
    <span class="keyword">class</span> <span class="identifier">AdditionalParameter_2</span> <span class="special">=</span> <span class="identifier">detail</span><span class="special">::</span><span class="identifier">not_specified</span>
<span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">bimap</span> <span class="emphasis"><em>- implementation defined { : public SetView } -</em></span>
<span class="special">{</span>
    <span class="keyword">public</span><span class="special">:</span>

    <span class="comment">// Metadata</span>

    <span class="keyword">typedef</span> <span class="emphasis"><em>-unspecified-</em></span> <span class="identifier">left_tag</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="emphasis"><em>-unspecified-</em></span> <span class="identifier">left_map</span><span class="special">;</span>

    <span class="keyword">typedef</span> <span class="emphasis"><em>-unspecified-</em></span> <span class="identifier">right_tag</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="emphasis"><em>-unspecified-</em></span> <span class="identifier">right_map</span><span class="special">;</span>

    <span class="comment">// Shortcuts</span>
    <span class="comment">// typedef -side-_map::-type- -side-_-type-;</span>

    <span class="keyword">typedef</span> <span class="emphasis"><em>-unspecified-</em></span> <span class="identifier">info_type</span><span class="special">;</span>

    <span class="comment">// Map views</span>

     <span class="identifier">left_map</span>  <span class="identifier">left</span><span class="special">;</span>
    <span class="identifier">right_map</span> <span class="identifier">right</span><span class="special">;</span>

    <span class="comment">// Constructors</span>

    <span class="identifier">bimap</span><span class="special">();</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">InputIterator</span> <span class="special">&gt;</span>
    <span class="identifier">bimap</span><span class="special">(</span><span class="identifier">InputIterator</span> <span class="identifier">first</span><span class="special">,</span><span class="identifier">InputIterator</span> <span class="identifier">last</span><span class="special">);</span>

    <span class="identifier">bimap</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">bimap</span> <span class="special">&amp;);</span>

    <span class="identifier">bimap</span><span class="special">&amp;</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">bimap</span><span class="special">&amp;</span> <span class="identifier">b</span><span class="special">);</span>

    <span class="comment">// Projection of iterators</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">left_iterator</span> <span class="identifier">project_left</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">left_const_iterator</span> <span class="identifier">project_left</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">right_iterator</span> <span class="identifier">project_right</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">right_const_iterator</span> <span class="identifier">project_right</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">iterator</span> <span class="identifier">project_up</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">const_iterator</span> <span class="identifier">project_up</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>

    <span class="comment">// Support for tags</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span> <span class="special">&gt;</span>
    <span class="keyword">struct</span> <span class="identifier">map_by</span><span class="special">;</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span> <span class="special">&gt;</span>
    <span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">by</span><span class="special">();</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span> <span class="special">&gt;</span>
    <span class="keyword">const</span> <span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="special">&amp;</span> <span class="identifier">by</span><span class="special">()</span> <span class="keyword">const</span><span class="special">;</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">iterator</span> <span class="identifier">project</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

    <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
    <span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">const_iterator</span> <span class="identifier">project</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span>

<span class="special">};</span>


<span class="special">}</span> <span class="comment">// namespace bimap</span>
<span class="special">}</span> <span class="comment">// namespace boost</span>
</pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap" title="Class template bimap">Class
        template bimap</a>
</h4></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.complexity">Complexity</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.instantiation_types">Instantiation
          types</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.nested_types">Nested
          types</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.constructors__copy_and_assignment">Constructors,
          copy and assignment</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.projection_operations">Projection
          operations</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.support_for_user_defined_names">Support
          for user defined names</a></span></dt>
<dt><span class="section"><a href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.serialization">Serialization</a></span></dt>
</dl></div>
<p>
          This is the main component of Boost.Bimap.
        </p>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap.complexity"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.complexity" title="Complexity">Complexity</a>
</h5></div></div></div>
<p>
            In the descriptions of the operations of <code class="computeroutput"><span class="identifier">bimap</span></code>,
            we adopt the scheme outlined in the complexity signature section.
          </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap.instantiation_types"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.instantiation_types" title="Instantiation types">Instantiation
          types</a>
</h5></div></div></div>
<p>
            <code class="computeroutput"><span class="identifier">bimap</span></code> is instantiated
            with the following types:
          </p>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
                LeftCollectionType and RightCollectionType are collection type specifications
                optionally tagged, or any type optionally tagged, in which case that
                side acts as a set.
              </li>
<li class="listitem">
                AdditionalParameter_{1/2} can be any ordered subset of:
                <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                      CollectionTypeOfRelation specification
                    </li>
<li class="listitem">
                      Allocator
                    </li>
</ul></div>
              </li>
</ol></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap.nested_types"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.nested_types" title="Nested types">Nested
          types</a>
</h5></div></div></div>
<pre class="programlisting"><span class="identifier">left_tag</span><span class="special">,</span> <span class="identifier">right_tag</span>
</pre>
<div class="blockquote"><blockquote class="blockquote"><p>
              Tags for each side of the bimap. If the user has not specified any
              tag the tags default to <code class="computeroutput"><span class="identifier">member_at</span><span class="special">::</span><span class="identifier">left</span></code>
              and <code class="computeroutput"><span class="identifier">member_at</span><span class="special">::</span><span class="identifier">right</span></code>.
            </p></blockquote></div>
<pre class="programlisting"><span class="identifier">left_key_type</span><span class="special">,</span> <span class="identifier">right_key_type</span>
</pre>
<div class="blockquote"><blockquote class="blockquote"><p>
              Key type of each side. In a <code class="computeroutput"><span class="identifier">bimap</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">,</span><span class="identifier">B</span><span class="special">&gt;</span> </code> <code class="computeroutput"><span class="identifier">left_key_type</span></code>
              is <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">right_key_type</span></code> is <code class="computeroutput"><span class="identifier">B</span></code>.
              If there are tags, it is better to use: <code class="computeroutput"><span class="identifier">Bimap</span><span class="special">::</span><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">key_type</span></code>.
            </p></blockquote></div>
<pre class="programlisting"><span class="identifier">left_data_type</span><span class="special">,</span> <span class="identifier">right_data_type</span>
</pre>
<div class="blockquote"><blockquote class="blockquote"><p>
              Data type of each side. In a bimap&lt;A,B&gt; left_key_type is B and
              right_key_type is A. If there are tags, it is better to use: <code class="computeroutput"><span class="identifier">Bimap</span><span class="special">::</span><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">data_type</span></code>.
            </p></blockquote></div>
<pre class="programlisting"><span class="identifier">left_value_type</span><span class="special">,</span> <span class="identifier">right_value_type</span>
</pre>
<div class="blockquote"><blockquote class="blockquote"><p>
              Value type used for the views. If there are tags, it is better to use:
              <code class="computeroutput"><span class="identifier">Bimap</span><span class="special">::</span><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code>.
            </p></blockquote></div>
<pre class="programlisting"><span class="identifier">left_iterator</span><span class="special">,</span> <span class="identifier">right_iterator</span>
<span class="identifier">left_const_iterator</span><span class="special">,</span> <span class="identifier">right_const_iterator</span>
</pre>
<div class="blockquote"><blockquote class="blockquote"><p>
              Iterators of the views. If there are tags, it is better to use: <code class="computeroutput"><span class="identifier">Bimap</span><span class="special">::</span><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">iterator</span></code> and <code class="computeroutput"><span class="identifier">Bimap</span><span class="special">::</span><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">const_iterator</span></code>
            </p></blockquote></div>
<pre class="programlisting"><span class="identifier">left_map</span><span class="special">,</span> <span class="identifier">right_map</span>
</pre>
<div class="blockquote"><blockquote class="blockquote"><p>
              Map view type of each side. If there are tags, it is better to use:
              <code class="computeroutput"><span class="identifier">Bimap</span><span class="special">::</span><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">type</span></code>.
            </p></blockquote></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap.constructors__copy_and_assignment"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.constructors__copy_and_assignment" title="Constructors, copy and assignment">Constructors,
          copy and assignment</a>
</h5></div></div></div>
<pre class="programlisting"><span class="identifier">bimap</span><span class="special">();</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Constructs an empty <code class="computeroutput"><span class="identifier">bimap</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> Constant.
              </li>
</ul></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">InputIterator</span><span class="special">&gt;</span>
<span class="identifier">bimap</span><span class="special">(</span><span class="identifier">InputIterator</span> <span class="identifier">first</span><span class="special">,</span><span class="identifier">InputIterator</span> <span class="identifier">last</span><span class="special">);</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires: </strong></span> <code class="computeroutput"><span class="identifier">InputIterator</span></code>
                is a model of Input Iterator over elements of type <code class="computeroutput"><span class="identifier">relation</span></code> or a type convertible
                to <code class="computeroutput"><span class="identifier">relation</span></code>. last
                is reachable from <code class="computeroutput"><span class="identifier">first</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Constructs an empty <code class="computeroutput"><span class="identifier">bimap</span></code> and fills it with the elements
                in the range <code class="computeroutput"><span class="special">[</span><span class="identifier">first</span><span class="special">,</span><span class="identifier">last</span><span class="special">)</span></code>. Insertion of each element may or
                may not succeed depending on acceptance by the collection types of
                the <code class="computeroutput"><span class="identifier">bimap</span></code>.
              </li>
<li class="listitem">
                <a class="link" href="bimap_reference.html#complexity_signature_explanation"><span class="bold"><strong>Complexity:</strong></span></a>
                O(m*H(m)), where m is the number of elements in <code class="computeroutput"><span class="special">[</span><span class="identifier">first</span><span class="special">,</span><span class="identifier">last</span><span class="special">)</span></code>.
              </li>
</ul></div>
<pre class="programlisting"><span class="identifier">bimap</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">bimap</span> <span class="special">&amp;</span> <span class="identifier">x</span><span class="special">);</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Constructs a copy of x,
                copying its elements as well as its internal objects (key extractors,
                comparison objects, allocator.)
              </li>
<li class="listitem">
                <span class="bold"><strong>Postconditions:</strong></span> <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span> <span class="special">==</span>
                <span class="identifier">x</span></code>. The order of the views
                of the <code class="computeroutput"><span class="identifier">bimap</span></code> is preserved
                as well.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> O(x.size()*log(x.size())
                + C(x.size()))
              </li>
</ul></div>
<pre class="programlisting"><span class="special">~</span><span class="identifier">bimap</span><span class="special">()</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Destroys the <code class="computeroutput"><span class="identifier">bimap</span></code> and all the elements contained.
                The order in which the elements are destroyed is not specified.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> O(n).
              </li>
</ul></div>
<pre class="programlisting"><span class="identifier">bimap</span><span class="special">&amp;</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">bimap</span><span class="special">&amp;</span> <span class="identifier">x</span><span class="special">);</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Replaces the elements and
                internal objects of the <code class="computeroutput"><span class="identifier">bimap</span></code>
                with copies from x.
              </li>
<li class="listitem">
                <span class="bold"><strong>Postconditions:</strong></span> <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span><span class="special">==</span><span class="identifier">x</span></code>. The order on the views of the
                <code class="computeroutput"><span class="identifier">bimap</span></code> is preserved
                as well.
              </li>
<li class="listitem">
                <span class="bold"><strong>Returns: </strong></span> <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> O(n + x.size()*log(x.size())
                + C(x.size())).
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> Strong, provided
                the copy and assignment operations of the types of <code class="computeroutput"><span class="identifier">ctor_args_list</span></code> do not throw.
              </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap.projection_operations"></a><a name="reference_projection_operations"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.projection_operations" title="Projection operations">Projection
          operations</a>
</h5></div></div></div>
<p>
            Given a <code class="computeroutput"><span class="identifier">bimap</span></code> with views
            v1 and v2, we say than an v1-iterator it1 and an v2-iterator it2 are
            equivalent if:
          </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <code class="computeroutput"><span class="identifier">it1</span> <span class="special">==</span>
                <span class="identifier">i1</span><span class="special">.</span><span class="identifier">end</span><span class="special">()</span></code>
                AND <code class="computeroutput"><span class="identifier">it2</span> <span class="special">==</span>
                <span class="identifier">i2</span><span class="special">.</span><span class="identifier">end</span><span class="special">()</span></code>,
              </li>
<li class="listitem">
                OR <code class="computeroutput"><span class="identifier">it1</span></code> and <code class="computeroutput"><span class="identifier">it2</span></code> point to the same element.
              </li>
</ul></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">left_iterator</span> <span class="identifier">project_left</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

<span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">left_const_iterator</span> <span class="identifier">project_left</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="identifier">IteratorType</span></code>
                is a bimap view iterator. it is a valid iterator of some view of
                <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
                (i.e. does not refer to some other <code class="computeroutput"><span class="identifier">bimap</span></code>.)
              </li>
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Returns a left map view
                iterator equivalent to <code class="computeroutput"><span class="identifier">it</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> Constant.
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> nothrow.
              </li>
</ul></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">right_iterator</span> <span class="identifier">project_right</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

<span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">right_const_iterator</span> <span class="identifier">project_right</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="identifier">IteratorType</span></code>
                is a bimap view iterator. it is a valid iterator of some view of
                <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
                (i.e. does not refer to some other <code class="computeroutput"><span class="identifier">bimap</span></code>.)
              </li>
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Returns a right map view
                iterator equivalent to <code class="computeroutput"><span class="identifier">it</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> Constant.
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> nothrow.
              </li>
</ul></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">iterator</span> <span class="identifier">project_up</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

<span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">const_iterator</span> <span class="identifier">project_up</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="identifier">IteratorType</span></code>
                is a bimap view iterator. it is a valid iterator of some view of
                <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
                (i.e. does not refer to some other <code class="computeroutput"><span class="identifier">bimap</span></code>.)
              </li>
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Returns a collection of
                relations view iterator equivalent to <code class="computeroutput"><span class="identifier">it</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> Constant.
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> nothrow.
              </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap.support_for_user_defined_names"></a><a name="reference_support_for_used_defined_names"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.support_for_user_defined_names" title="Support for user defined names">Support
          for user defined names</a>
</h5></div></div></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span> <span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">map_by</span><span class="special">;</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <code class="computeroutput"><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">type</span></code> yields the type of the map
                view tagged with <code class="computeroutput"><span class="identifier">Tag</span></code>.
                <code class="computeroutput"><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span></code><span class="emphasis"><em>-type
                name-</em></span> is the same as <code class="computeroutput"><span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">type</span><span class="special">::</span></code><span class="emphasis"><em>-type name-</em></span>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Requires: </strong></span> <code class="computeroutput"><span class="identifier">Tag</span></code>
                is a valid user defined name of the bimap.
              </li>
</ul></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span> <span class="special">&gt;</span>
<span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">by</span><span class="special">();</span>

<span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span> <span class="special">&gt;</span>
<span class="keyword">const</span> <span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="special">&amp;</span> <span class="identifier">by</span><span class="special">()</span> <span class="keyword">const</span><span class="special">;</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires: </strong></span> <code class="computeroutput"><span class="identifier">Tag</span></code>
                is a valid user defined name of the bimap.
              </li>
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Returns a reference to
                the map view tagged with <code class="computeroutput"><span class="identifier">Tag</span></code>
                held by <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> Constant.
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> nothrow.
              </li>
</ul></div>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">iterator</span> <span class="identifier">project</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">);</span>

<span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">class</span> <span class="identifier">Tag</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">IteratorType</span> <span class="special">&gt;</span>
<span class="identifier">map_by</span><span class="special">&lt;</span><span class="identifier">Tag</span><span class="special">&gt;::</span><span class="identifier">const_iterator</span> <span class="identifier">project</span><span class="special">(</span><span class="identifier">IteratorType</span> <span class="identifier">iter</span><span class="special">)</span> <span class="keyword">const</span>
</pre>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires: </strong></span> <code class="computeroutput"><span class="identifier">Tag</span></code>
                is a valid user defined name of the bimap. <code class="computeroutput"><span class="identifier">IteratorType</span></code>
                is a bimap view iterator. it is a valid iterator of some view of
                <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
                (i.e. does not refer to some other <code class="computeroutput"><span class="identifier">bimap</span></code>.)
              </li>
<li class="listitem">
                <span class="bold"><strong>Effects:</strong></span> Returns a reference to
                the map view tagged with <code class="computeroutput"><span class="identifier">Tag</span></code>
                held by <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>.
              </li>
<li class="listitem">
                <span class="bold"><strong>Complexity:</strong></span> Constant.
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> nothrow.
              </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="boost_bimap.reference.bimap_reference.class_template_bimap.serialization"></a><a class="link" href="bimap_reference.html#boost_bimap.reference.bimap_reference.class_template_bimap.serialization" title="Serialization">Serialization</a>
</h5></div></div></div>
<p>
            A <code class="computeroutput"><span class="identifier">bimap</span></code> can be archived
            and retrieved by means of <a href="http://www.boost.org/libs/serialization/doc/index.html" target="_top"><span class="bold"><strong>Boost.Serialization</strong></span></a>. Boost.Bimap does
            not expose a public serialisation interface, as this is provided by Boost.Serialization
            itself. Both regular and XML archives are supported.
          </p>
<p>
            Each of the set specifications comprising a given <code class="computeroutput"><span class="identifier">bimap</span></code>
            contributes its own preconditions as well as guarantees on the retrieved
            containers. In describing these, the following concepts are used. A type
            <code class="computeroutput"><span class="identifier">T</span></code> is <span class="emphasis"><em>serializable</em></span>
            (resp. XML-serializable) if any object of type <code class="computeroutput"><span class="identifier">T</span></code>
            can be saved to an output archive (XML archive) and later retrieved from
            an input archive (XML archive) associated to the same storage. If <code class="computeroutput"><span class="identifier">x</span></code>' of type <code class="computeroutput"><span class="identifier">T</span></code>
            is loaded from the serialization information saved from another object
            x, we say that x' is a <span class="emphasis"><em>restored copy</em></span> of x. Given
            a <a href="https://www.boost.org/sgi/stl/BinaryPredicate.html" target="_top">Binary
            Predicate</a> <code class="computeroutput"><span class="identifier">Pred</span></code>
            over <code class="computeroutput"><span class="special">(</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">T</span><span class="special">)</span></code>, and objects <code class="computeroutput"><span class="identifier">p</span></code>
            and <code class="computeroutput"><span class="identifier">q</span></code> of type <code class="computeroutput"><span class="identifier">Pred</span></code>, we say that <code class="computeroutput"><span class="identifier">q</span></code>
            is <span class="emphasis"><em>serialization-compatible</em></span> with <code class="computeroutput"><span class="identifier">p</span></code>
            if
          </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
                <code class="computeroutput"><span class="identifier">p</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span><span class="identifier">y</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">q</span><span class="special">(</span><span class="identifier">x</span></code>'<code class="computeroutput"><span class="special">,</span><span class="identifier">y</span></code>'<code class="computeroutput"><span class="special">)</span></code>
              </li></ul></div>
<p>
            for every <code class="computeroutput"><span class="identifier">x</span></code> and <code class="computeroutput"><span class="identifier">y</span></code> of type <code class="computeroutput"><span class="identifier">T</span></code>
            and <code class="computeroutput"><span class="identifier">x</span></code>' and <code class="computeroutput"><span class="identifier">y</span></code>' being restored copies of <code class="computeroutput"><span class="identifier">x</span></code> and <code class="computeroutput"><span class="identifier">y</span></code>,
            respectively.
          </p>
<div class="blurb">
<div class="titlepage"><div><div><p class="title"><b></b></p></div></div></div>
<p>
            <span class="bold"><strong>Operation:</strong></span> saving of a <code class="computeroutput"><span class="identifier">bimap</span> <span class="identifier">b</span></code>
            to an output archive (XML archive) ar.
          </p>
</div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires:</strong></span> Value is serializable
                (XML-serializable). Additionally, each of the views of b can impose
                other requirements.
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> Strong with respect
                to <code class="computeroutput"><span class="identifier">b</span></code>. If an exception
                is thrown, ar may be left in an inconsistent state.
              </li>
</ul></div>
<div class="blurb">
<div class="titlepage"><div><div><p class="title"><b></b></p></div></div></div>
<p>
            <span class="bold"><strong>Operation:</strong></span> loading of a <code class="computeroutput"><span class="identifier">bimap</span></code> m' from an input archive (XML
            archive) ar.
          </p>
</div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
                <span class="bold"><strong>Requires:</strong></span> Value is serializable
                (XML-serializable). Additionally, each of the views of <code class="computeroutput"><span class="identifier">b</span></code>' can impose other requirements.
              </li>
<li class="listitem">
                <span class="bold"><strong>Exception safety:</strong></span> Basic. If an exception
                is thrown, ar may be left in an inconsistent state.
              </li>
</ul></div>
</div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2006-2012 Matias Capeletto<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>
</tr></table>
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