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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="intrusive.node_algorithms"></a><a class="link" href="node_algorithms.html" title="Node algorithms with custom NodeTraits">Node algorithms with custom
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NodeTraits</a>
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</h2></div></div></div>
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<div class="toc"><dl class="toc">
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<dt><span class="section"><a href="node_algorithms.html#intrusive.node_algorithms.circular_slist_algorithms">Intrusive
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singly linked list algorithms</a></span></dt>
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<dt><span class="section"><a href="node_algorithms.html#intrusive.node_algorithms.circular_list_algorithms">Intrusive
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doubly linked list algorithms</a></span></dt>
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<dt><span class="section"><a href="node_algorithms.html#intrusive.node_algorithms.rbtree_algorithms">Intrusive
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||
red-black tree algorithms</a></span></dt>
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<dt><span class="section"><a href="node_algorithms.html#intrusive.node_algorithms.splaytree_algorithms">Intrusive
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||
splay tree algorithms</a></span></dt>
|
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<dt><span class="section"><a href="node_algorithms.html#intrusive.node_algorithms.avltree_algorithms">Intrusive
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avl tree algorithms</a></span></dt>
|
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<dt><span class="section"><a href="node_algorithms.html#intrusive.node_algorithms.treap_algorithms">Intrusive
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||
treap algorithms</a></span></dt>
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</dl></div>
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<p>
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As explained in the <a class="link" href="concepts.html" title="Concepts explained">Concepts</a> section,
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<span class="bold"><strong>Boost.Intrusive</strong></span> containers are implemented
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using node algorithms that work on generic nodes.
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</p>
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<p>
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Sometimes, the use of intrusive containers is expensive for some environments
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||
and the programmer might want to avoid all the template instantiations related
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||
to <span class="bold"><strong>Boost.Intrusive</strong></span> containers. However, the
|
||
user can still benefit from <span class="bold"><strong>Boost.Intrusive</strong></span>
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using the node algorithms, because some of those algorithms, like red-black
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tree algorithms, are not trivial to write.
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||
</p>
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<p>
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||
All node algorithm classes are templatized by a <code class="computeroutput"><span class="identifier">NodeTraits</span></code>
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||
class. This class encapsulates the needed internal type declarations and operations
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||
to make a node compatible with node algorithms. Each type of node algorithms
|
||
has its own requirements:
|
||
</p>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
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||
<a name="intrusive.node_algorithms.circular_slist_algorithms"></a><a class="link" href="node_algorithms.html#intrusive.node_algorithms.circular_slist_algorithms" title="Intrusive singly linked list algorithms">Intrusive
|
||
singly linked list algorithms</a>
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||
</h3></div></div></div>
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<p>
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These algorithms are static members of the <code class="computeroutput"><a class="link" href="../boost/intrusive/circular_slist_algorithms.html" title="Class template circular_slist_algorithms">circular_slist_algorithms</a></code>
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class:
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||
</p>
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<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">NodeTraits</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">circular_slist_algorithms</span><span class="special">;</span>
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</pre>
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<p>
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An empty list is formed by a node whose pointer to the next node points to
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itself. <code class="computeroutput"><a class="link" href="../boost/intrusive/circular_slist_algorithms.html" title="Class template circular_slist_algorithms">circular_slist_algorithms</a></code>
|
||
is configured with a NodeTraits class, which encapsulates the information
|
||
about the node to be manipulated. NodeTraits must support the following interface:
|
||
</p>
|
||
<p>
|
||
<span class="bold"><strong>Typedefs</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
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<code class="computeroutput"><span class="identifier">node</span></code>: The type of the
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||
node that forms the circular list
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||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node_ptr</span></code>: The type of
|
||
a pointer to a node (usually node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">const_node_ptr</span></code>: The type
|
||
of a pointer to a const node (usually const node*)
|
||
</li>
|
||
</ul></div>
|
||
<p>
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<span class="bold"><strong>Static functions</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
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<li class="listitem">
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<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
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<span class="identifier">get_next</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the next node
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||
stored in "n".
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||
</li>
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||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
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||
<span class="identifier">set_next</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
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||
<span class="identifier">next</span><span class="special">);</span></code>:
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||
Sets the pointer to the next node stored in "n" to "next".
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
Once we have a node traits configuration we can use <span class="bold"><strong>Boost.Intrusive</strong></span>
|
||
algorithms with our nodes:
|
||
</p>
|
||
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">intrusive</span><span class="special">/</span><span class="identifier">circular_slist_algorithms</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cassert</span><span class="special">></span>
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||
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||
<span class="keyword">struct</span> <span class="identifier">my_node</span>
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||
<span class="special">{</span>
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||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">next_</span><span class="special">;</span>
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||
<span class="comment">//other members...</span>
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||
<span class="special">};</span>
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||
|
||
<span class="comment">//Define our own slist_node_traits</span>
|
||
<span class="keyword">struct</span> <span class="identifier">my_slist_node_traits</span>
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||
<span class="special">{</span>
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||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="identifier">node</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">node_ptr</span><span class="special">;</span>
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<span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">const_node_ptr</span><span class="special">;</span>
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<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_next</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">next_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_next</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">next</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">next_</span> <span class="special">=</span> <span class="identifier">next</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">circular_slist_algorithms</span><span class="special"><</span><span class="identifier">my_slist_node_traits</span><span class="special">></span> <span class="identifier">algo</span><span class="special">;</span>
|
||
<span class="identifier">my_node</span> <span class="identifier">one</span><span class="special">,</span> <span class="identifier">two</span><span class="special">,</span> <span class="identifier">three</span><span class="special">;</span>
|
||
|
||
<span class="comment">//Create an empty singly linked list container:</span>
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||
<span class="comment">//"one" will be the first node of the container</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">init_header</span><span class="special">(&</span><span class="identifier">one</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
|
||
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||
<span class="comment">//Now add a new node</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">link_after</span><span class="special">(&</span><span class="identifier">one</span><span class="special">,</span> <span class="special">&</span><span class="identifier">two</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">2</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now add a new node after "one"</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">link_after</span><span class="special">(&</span><span class="identifier">one</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">3</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now unlink the node after one</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink_after</span><span class="special">(&</span><span class="identifier">one</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">2</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now unlink two</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">two</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
|
||
|
||
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
|
||
<span class="special">}</span>
|
||
</pre>
|
||
<p>
|
||
For a complete list of functions see <code class="computeroutput"><a class="link" href="../boost/intrusive/circular_slist_algorithms.html" title="Class template circular_slist_algorithms">circular_slist_algorithms
|
||
reference</a></code>.
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="intrusive.node_algorithms.circular_list_algorithms"></a><a class="link" href="node_algorithms.html#intrusive.node_algorithms.circular_list_algorithms" title="Intrusive doubly linked list algorithms">Intrusive
|
||
doubly linked list algorithms</a>
|
||
</h3></div></div></div>
|
||
<p>
|
||
These algorithms are static members of the <code class="computeroutput"><a class="link" href="../boost/intrusive/circular_list_algorithms.html" title="Class template circular_list_algorithms">circular_list_algorithms</a></code>
|
||
class:
|
||
</p>
|
||
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">NodeTraits</span><span class="special">></span>
|
||
<span class="keyword">struct</span> <span class="identifier">circular_list_algorithms</span><span class="special">;</span>
|
||
</pre>
|
||
<p>
|
||
An empty list is formed by a node whose pointer to the next node points to
|
||
itself. <code class="computeroutput"><a class="link" href="../boost/intrusive/circular_list_algorithms.html" title="Class template circular_list_algorithms">circular_list_algorithms</a></code>
|
||
is configured with a NodeTraits class, which encapsulates the information
|
||
about the node to be manipulated. NodeTraits must support the following interface:
|
||
</p>
|
||
<p>
|
||
<span class="bold"><strong>Typedefs</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node</span></code>: The type of the
|
||
node that forms the circular list
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node_ptr</span></code>: The type of
|
||
a pointer to a node (usually node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">const_node_ptr</span></code>: The type
|
||
of a pointer to a const node (usually const node*)
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
<span class="bold"><strong>Static functions</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_next</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the next node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_next</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">next</span><span class="special">);</span></code>:
|
||
Sets the pointer to the next node stored in "n" to "next".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_previous</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the previous
|
||
node stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_previous</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">prev</span><span class="special">);</span></code>:
|
||
Sets the pointer to the previous node stored in "n" to "prev".
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
Once we have a node traits configuration we can use <span class="bold"><strong>Boost.Intrusive</strong></span>
|
||
algorithms with our nodes:
|
||
</p>
|
||
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">intrusive</span><span class="special">/</span><span class="identifier">circular_list_algorithms</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
|
||
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cassert</span><span class="special">></span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">my_node</span>
|
||
<span class="special">{</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">next_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">prev_</span><span class="special">;</span>
|
||
<span class="comment">//other members...</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="comment">//Define our own list_node_traits</span>
|
||
<span class="keyword">struct</span> <span class="identifier">my_list_node_traits</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="identifier">node</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">const_node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_next</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">next_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_next</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">next</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">next_</span> <span class="special">=</span> <span class="identifier">next</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node</span> <span class="special">*</span><span class="identifier">get_previous</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">prev_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_previous</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">prev</span><span class="special">){</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">prev_</span> <span class="special">=</span> <span class="identifier">prev</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">circular_list_algorithms</span><span class="special"><</span><span class="identifier">my_list_node_traits</span><span class="special">></span> <span class="identifier">algo</span><span class="special">;</span>
|
||
<span class="identifier">my_node</span> <span class="identifier">one</span><span class="special">,</span> <span class="identifier">two</span><span class="special">,</span> <span class="identifier">three</span><span class="special">;</span>
|
||
|
||
<span class="comment">//Create an empty doubly linked list container:</span>
|
||
<span class="comment">//"one" will be the first node of the container</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">init_header</span><span class="special">(&</span><span class="identifier">one</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now add a new node before "one"</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">link_before</span><span class="special">(&</span><span class="identifier">one</span><span class="special">,</span> <span class="special">&</span><span class="identifier">two</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">2</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now add a new node after "two"</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">link_after</span><span class="special">(&</span><span class="identifier">two</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">3</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now unlink the node after one</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">three</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">2</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now unlink two</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">two</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now unlink one</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">one</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">algo</span><span class="special">::</span><span class="identifier">count</span><span class="special">(&</span><span class="identifier">one</span><span class="special">)</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
|
||
|
||
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
|
||
<span class="special">}</span>
|
||
</pre>
|
||
<p>
|
||
For a complete list of functions see <code class="computeroutput"><a class="link" href="../boost/intrusive/circular_list_algorithms.html" title="Class template circular_list_algorithms">circular_list_algorithms
|
||
reference</a></code>.
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="intrusive.node_algorithms.rbtree_algorithms"></a><a class="link" href="node_algorithms.html#intrusive.node_algorithms.rbtree_algorithms" title="Intrusive red-black tree algorithms">Intrusive
|
||
red-black tree algorithms</a>
|
||
</h3></div></div></div>
|
||
<p>
|
||
These algorithms are static members of the <code class="computeroutput"><a class="link" href="../boost/intrusive/rbtree_algorithms.html" title="Class template rbtree_algorithms">rbtree_algorithms</a></code>
|
||
class:
|
||
</p>
|
||
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">NodeTraits</span><span class="special">></span>
|
||
<span class="keyword">struct</span> <span class="identifier">rbtree_algorithms</span><span class="special">;</span>
|
||
</pre>
|
||
<p>
|
||
An empty tree is formed by a node whose pointer to the parent node is null,
|
||
the left and right node pointers point to itself, and whose color is red.
|
||
<code class="computeroutput"><a class="link" href="../boost/intrusive/rbtree_algorithms.html" title="Class template rbtree_algorithms">rbtree_algorithms</a></code>
|
||
is configured with a NodeTraits class, which encapsulates the information
|
||
about the node to be manipulated. NodeTraits must support the following interface:
|
||
</p>
|
||
<p>
|
||
<span class="bold"><strong>Typedefs</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node</span></code>: The type of the
|
||
node that forms the circular rbtree
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node_ptr</span></code>: The type of
|
||
a pointer to a node (usually node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">const_node_ptr</span></code>: The type
|
||
of a pointer to a const node (usually const node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">color</span></code>: The type that
|
||
can store the color of a node
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
<span class="bold"><strong>Static functions</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the parent node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">p</span><span class="special">);</span></code>:
|
||
Sets the pointer to the parent node stored in "n" to "p".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the left node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">l</span><span class="special">);</span></code>:
|
||
Sets the pointer to the left node stored in "n" to "l".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the right node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">r</span><span class="special">);</span></code>:
|
||
Sets the pointer to the right node stored in "n" to "r".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">color</span>
|
||
<span class="identifier">get_color</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns the color stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_color</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">color</span> <span class="identifier">c</span><span class="special">);</span></code>:
|
||
Sets the color stored in "n" to "c".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">color</span>
|
||
<span class="identifier">black</span><span class="special">();</span></code>:
|
||
Returns a value representing the black color.
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">color</span>
|
||
<span class="identifier">red</span><span class="special">();</span></code>:
|
||
Returns a value representing the red color.
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
Once we have a node traits configuration we can use <span class="bold"><strong>Boost.Intrusive</strong></span>
|
||
algorithms with our nodes:
|
||
</p>
|
||
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">intrusive</span><span class="special">/</span><span class="identifier">rbtree_algorithms</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
|
||
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cassert</span><span class="special">></span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">my_node</span>
|
||
<span class="special">{</span>
|
||
<span class="identifier">my_node</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span>
|
||
<span class="special">:</span> <span class="identifier">int_</span><span class="special">(</span><span class="identifier">i</span><span class="special">)</span>
|
||
<span class="special">{}</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">parent_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">left_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">right_</span><span class="special">;</span>
|
||
<span class="keyword">int</span> <span class="identifier">color_</span><span class="special">;</span>
|
||
<span class="comment">//other members</span>
|
||
<span class="keyword">int</span> <span class="identifier">int_</span><span class="special">;</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="comment">//Define our own rbtree_node_traits</span>
|
||
<span class="keyword">struct</span> <span class="identifier">my_rbtree_node_traits</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="identifier">node</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">const_node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="keyword">int</span> <span class="identifier">color</span><span class="special">;</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">parent</span><span class="special">){</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span> <span class="special">=</span> <span class="identifier">parent</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">left</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span> <span class="special">=</span> <span class="identifier">left</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">right</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span> <span class="special">=</span> <span class="identifier">right</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">color</span> <span class="identifier">get_color</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">color_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_color</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">color</span> <span class="identifier">c</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">color_</span> <span class="special">=</span> <span class="identifier">c</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">color</span> <span class="identifier">black</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">color</span><span class="special">(</span><span class="number">0</span><span class="special">);</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">color</span> <span class="identifier">red</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">color</span><span class="special">(</span><span class="number">1</span><span class="special">);</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">node_ptr_compare</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">a</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">b</span><span class="special">)</span>
|
||
<span class="special">{</span> <span class="keyword">return</span> <span class="identifier">a</span><span class="special">-></span><span class="identifier">int_</span> <span class="special"><</span> <span class="identifier">b</span><span class="special">-></span><span class="identifier">int_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">rbtree_algorithms</span><span class="special"><</span><span class="identifier">my_rbtree_node_traits</span><span class="special">></span> <span class="identifier">algo</span><span class="special">;</span>
|
||
<span class="identifier">my_node</span> <span class="identifier">header</span><span class="special">,</span> <span class="identifier">two</span><span class="special">(</span><span class="number">2</span><span class="special">),</span> <span class="identifier">three</span><span class="special">(</span><span class="number">3</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Create an empty rbtree container:</span>
|
||
<span class="comment">//"header" will be the header node of the tree</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">init_header</span><span class="special">(&</span><span class="identifier">header</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now insert node "two" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_upper_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">two</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now insert node "three" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_lower_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now take the first node (the left node of the header)</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">n</span> <span class="special">=</span> <span class="identifier">header</span><span class="special">.</span><span class="identifier">left_</span><span class="special">;</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">two</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now go to the next node</span>
|
||
<span class="identifier">n</span> <span class="special">=</span> <span class="identifier">algo</span><span class="special">::</span><span class="identifier">next_node</span><span class="special">(</span><span class="identifier">n</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Erase a node just using a pointer to it</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">two</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Erase a node using also the header (faster)</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">erase</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
|
||
<span class="special">}</span>
|
||
</pre>
|
||
<p>
|
||
For a complete list of functions see <code class="computeroutput"><a class="link" href="../boost/intrusive/rbtree_algorithms.html" title="Class template rbtree_algorithms">rbtree_algorithms
|
||
reference</a></code>.
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="intrusive.node_algorithms.splaytree_algorithms"></a><a class="link" href="node_algorithms.html#intrusive.node_algorithms.splaytree_algorithms" title="Intrusive splay tree algorithms">Intrusive
|
||
splay tree algorithms</a>
|
||
</h3></div></div></div>
|
||
<p>
|
||
These algorithms are static members of the <code class="computeroutput"><a class="link" href="../boost/intrusive/splaytree_algorithms.html" title="Class template splaytree_algorithms">splaytree_algorithms</a></code>
|
||
class:
|
||
</p>
|
||
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">NodeTraits</span><span class="special">></span>
|
||
<span class="keyword">struct</span> <span class="identifier">splaytree_algorithms</span><span class="special">;</span>
|
||
</pre>
|
||
<p>
|
||
An empty tree is formed by a node whose pointer to the parent node is null,
|
||
and whose left and right nodes pointers point to itself. <code class="computeroutput"><a class="link" href="../boost/intrusive/splaytree_algorithms.html" title="Class template splaytree_algorithms">splaytree_algorithms</a></code>
|
||
is configured with a NodeTraits class, which encapsulates the information
|
||
about the node to be manipulated. NodeTraits must support the following interface:
|
||
</p>
|
||
<p>
|
||
<span class="bold"><strong>Typedefs</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node</span></code>: The type of the
|
||
node that forms the circular splaytree
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node_ptr</span></code>: The type of
|
||
a pointer to a node (usually node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">const_node_ptr</span></code>: The type
|
||
of a pointer to a const node (usually const node*)
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
<span class="bold"><strong>Static functions</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the parent node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">p</span><span class="special">);</span></code>:
|
||
Sets the pointer to the parent node stored in "n" to "p".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the left node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">l</span><span class="special">);</span></code>:
|
||
Sets the pointer to the left node stored in "n" to "l".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the right node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">r</span><span class="special">);</span></code>:
|
||
Sets the pointer to the right node stored in "n" to "r".
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
Once we have a node traits configuration we can use <span class="bold"><strong>Boost.Intrusive</strong></span>
|
||
algorithms with our nodes:
|
||
</p>
|
||
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">intrusive</span><span class="special">/</span><span class="identifier">splaytree_algorithms</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
|
||
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cassert</span><span class="special">></span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">my_node</span>
|
||
<span class="special">{</span>
|
||
<span class="identifier">my_node</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span>
|
||
<span class="special">:</span> <span class="identifier">int_</span><span class="special">(</span><span class="identifier">i</span><span class="special">)</span>
|
||
<span class="special">{}</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">parent_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">left_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">right_</span><span class="special">;</span>
|
||
<span class="comment">//other members</span>
|
||
<span class="keyword">int</span> <span class="identifier">int_</span><span class="special">;</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="comment">//Define our own splaytree_node_traits</span>
|
||
<span class="keyword">struct</span> <span class="identifier">my_splaytree_node_traits</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="identifier">node</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">const_node_ptr</span><span class="special">;</span>
|
||
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">parent</span><span class="special">){</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span> <span class="special">=</span> <span class="identifier">parent</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">left</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span> <span class="special">=</span> <span class="identifier">left</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">right</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span> <span class="special">=</span> <span class="identifier">right</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">node_ptr_compare</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">a</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">b</span><span class="special">)</span>
|
||
<span class="special">{</span> <span class="keyword">return</span> <span class="identifier">a</span><span class="special">-></span><span class="identifier">int_</span> <span class="special"><</span> <span class="identifier">b</span><span class="special">-></span><span class="identifier">int_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">splaytree_algorithms</span><span class="special"><</span><span class="identifier">my_splaytree_node_traits</span><span class="special">></span> <span class="identifier">algo</span><span class="special">;</span>
|
||
<span class="identifier">my_node</span> <span class="identifier">header</span><span class="special">,</span> <span class="identifier">two</span><span class="special">(</span><span class="number">2</span><span class="special">),</span> <span class="identifier">three</span><span class="special">(</span><span class="number">3</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Create an empty splaytree container:</span>
|
||
<span class="comment">//"header" will be the header node of the tree</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">init_header</span><span class="special">(&</span><span class="identifier">header</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now insert node "two" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_upper_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">two</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now insert node "three" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_lower_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now take the first node (the left node of the header)</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">n</span> <span class="special">=</span> <span class="identifier">header</span><span class="special">.</span><span class="identifier">left_</span><span class="special">;</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">two</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now go to the next node</span>
|
||
<span class="identifier">n</span> <span class="special">=</span> <span class="identifier">algo</span><span class="special">::</span><span class="identifier">next_node</span><span class="special">(</span><span class="identifier">n</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Erase a node just using a pointer to it</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">two</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Erase a node using also the header (faster)</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">erase</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
|
||
<span class="special">}</span>
|
||
</pre>
|
||
<p>
|
||
For a complete list of functions see <code class="computeroutput"><a class="link" href="../boost/intrusive/splaytree_algorithms.html" title="Class template splaytree_algorithms">splaytree_algorithms
|
||
reference</a></code>.
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="intrusive.node_algorithms.avltree_algorithms"></a><a class="link" href="node_algorithms.html#intrusive.node_algorithms.avltree_algorithms" title="Intrusive avl tree algorithms">Intrusive
|
||
avl tree algorithms</a>
|
||
</h3></div></div></div>
|
||
<p>
|
||
<code class="computeroutput"><a class="link" href="../boost/intrusive/avltree_algorithms.html" title="Class template avltree_algorithms">avltree_algorithms</a></code>
|
||
have the same interface as <code class="computeroutput"><a class="link" href="../boost/intrusive/rbtree_algorithms.html" title="Class template rbtree_algorithms">rbtree_algorithms</a></code>.
|
||
</p>
|
||
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">NodeTraits</span><span class="special">></span>
|
||
<span class="keyword">struct</span> <span class="identifier">avltree_algorithms</span><span class="special">;</span>
|
||
</pre>
|
||
<p>
|
||
<code class="computeroutput"><a class="link" href="../boost/intrusive/avltree_algorithms.html" title="Class template avltree_algorithms">avltree_algorithms</a></code>
|
||
is configured with a NodeTraits class, which encapsulates the information
|
||
about the node to be manipulated. NodeTraits must support the following interface:
|
||
</p>
|
||
<p>
|
||
<span class="bold"><strong>Typedefs</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node</span></code>: The type of the
|
||
node that forms the circular avltree
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node_ptr</span></code>: The type of
|
||
a pointer to a node (usually node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">const_node_ptr</span></code>: The type
|
||
of a pointer to a const node (usually const node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">balance</span></code>: A type that
|
||
can represent 3 balance types (usually an integer)
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
<span class="bold"><strong>Static functions</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the parent node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">p</span><span class="special">);</span></code>:
|
||
Sets the pointer to the parent node stored in "n" to "p".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the left node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">l</span><span class="special">);</span></code>:
|
||
Sets the pointer to the left node stored in "n" to "l".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the right node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">r</span><span class="special">);</span></code>:
|
||
Sets the pointer to the right node stored in "n" to "r".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">balance</span>
|
||
<span class="identifier">get_balance</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns the balance factor stored
|
||
in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_balance</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">balance</span>
|
||
<span class="identifier">b</span><span class="special">);</span></code>:
|
||
Sets the balance factor stored in "n" to "b".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">balance</span>
|
||
<span class="identifier">negative</span><span class="special">();</span></code>:
|
||
Returns a value representing a negative balance factor.
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">balance</span>
|
||
<span class="identifier">zero</span><span class="special">();</span></code>:
|
||
Returns a value representing a zero balance factor.
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">balance</span>
|
||
<span class="identifier">positive</span><span class="special">();</span></code>:
|
||
Returns a value representing a positive balance factor.
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
Once we have a node traits configuration we can use <span class="bold"><strong>Boost.Intrusive</strong></span>
|
||
algorithms with our nodes:
|
||
</p>
|
||
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">intrusive</span><span class="special">/</span><span class="identifier">avltree_algorithms</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
|
||
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cassert</span><span class="special">></span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">my_node</span>
|
||
<span class="special">{</span>
|
||
<span class="identifier">my_node</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span>
|
||
<span class="special">:</span> <span class="identifier">int_</span><span class="special">(</span><span class="identifier">i</span><span class="special">)</span>
|
||
<span class="special">{}</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">parent_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">left_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">right_</span><span class="special">;</span>
|
||
<span class="keyword">int</span> <span class="identifier">balance_</span><span class="special">;</span>
|
||
<span class="comment">//other members</span>
|
||
<span class="keyword">int</span> <span class="identifier">int_</span><span class="special">;</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="comment">//Define our own avltree_node_traits</span>
|
||
<span class="keyword">struct</span> <span class="identifier">my_avltree_node_traits</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="identifier">node</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">const_node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="keyword">int</span> <span class="identifier">balance</span><span class="special">;</span>
|
||
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">parent</span><span class="special">){</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span> <span class="special">=</span> <span class="identifier">parent</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">left</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span> <span class="special">=</span> <span class="identifier">left</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">right</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span> <span class="special">=</span> <span class="identifier">right</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">balance</span> <span class="identifier">get_balance</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">balance_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_balance</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">balance</span> <span class="identifier">b</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">balance_</span> <span class="special">=</span> <span class="identifier">b</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">balance</span> <span class="identifier">negative</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="special">-</span><span class="number">1</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">balance</span> <span class="identifier">zero</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">balance</span> <span class="identifier">positive</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="number">1</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">node_ptr_compare</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">a</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">b</span><span class="special">)</span>
|
||
<span class="special">{</span> <span class="keyword">return</span> <span class="identifier">a</span><span class="special">-></span><span class="identifier">int_</span> <span class="special"><</span> <span class="identifier">b</span><span class="special">-></span><span class="identifier">int_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">avltree_algorithms</span><span class="special"><</span><span class="identifier">my_avltree_node_traits</span><span class="special">></span> <span class="identifier">algo</span><span class="special">;</span>
|
||
<span class="identifier">my_node</span> <span class="identifier">header</span><span class="special">,</span> <span class="identifier">two</span><span class="special">(</span><span class="number">2</span><span class="special">),</span> <span class="identifier">three</span><span class="special">(</span><span class="number">3</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Create an empty avltree container:</span>
|
||
<span class="comment">//"header" will be the header node of the tree</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">init_header</span><span class="special">(&</span><span class="identifier">header</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now insert node "two" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_upper_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">two</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now insert node "three" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_lower_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now take the first node (the left node of the header)</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">n</span> <span class="special">=</span> <span class="identifier">header</span><span class="special">.</span><span class="identifier">left_</span><span class="special">;</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">two</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now go to the next node</span>
|
||
<span class="identifier">n</span> <span class="special">=</span> <span class="identifier">algo</span><span class="special">::</span><span class="identifier">next_node</span><span class="special">(</span><span class="identifier">n</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Erase a node just using a pointer to it</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">two</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Erase a node using also the header (faster)</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">erase</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
|
||
<span class="special">}</span>
|
||
</pre>
|
||
<p>
|
||
For a complete list of functions see <code class="computeroutput"><a class="link" href="../boost/intrusive/avltree_algorithms.html" title="Class template avltree_algorithms">avltree_algorithms
|
||
reference</a></code>.
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="intrusive.node_algorithms.treap_algorithms"></a><a class="link" href="node_algorithms.html#intrusive.node_algorithms.treap_algorithms" title="Intrusive treap algorithms">Intrusive
|
||
treap algorithms</a>
|
||
</h3></div></div></div>
|
||
<p>
|
||
<code class="computeroutput"><a class="link" href="../boost/intrusive/treap_algorithms.html" title="Class template treap_algorithms">treap_algorithms</a></code>
|
||
have the same interface as <code class="computeroutput"><a class="link" href="../boost/intrusive/rbtree_algorithms.html" title="Class template rbtree_algorithms">rbtree_algorithms</a></code>.
|
||
</p>
|
||
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">NodeTraits</span><span class="special">></span>
|
||
<span class="keyword">struct</span> <span class="identifier">treap_algorithms</span><span class="special">;</span>
|
||
</pre>
|
||
<p>
|
||
<code class="computeroutput"><a class="link" href="../boost/intrusive/treap_algorithms.html" title="Class template treap_algorithms">treap_algorithms</a></code>
|
||
is configured with a NodeTraits class, which encapsulates the information
|
||
about the node to be manipulated. NodeTraits must support the following interface:
|
||
</p>
|
||
<p>
|
||
<span class="bold"><strong>Typedefs</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node</span></code>: The type of the
|
||
node that forms the circular treap
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">node_ptr</span></code>: The type of
|
||
a pointer to a node (usually node*)
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="identifier">const_node_ptr</span></code>: The type
|
||
of a pointer to a const node (usually const node*)
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
<span class="bold"><strong>Static functions</strong></span>:
|
||
</p>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the parent node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">p</span><span class="special">);</span></code>:
|
||
Sets the pointer to the parent node stored in "n" to "p".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the left node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">l</span><span class="special">);</span></code>:
|
||
Sets the pointer to the left node stored in "n" to "l".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">);</span></code>: Returns a pointer to the right node
|
||
stored in "n".
|
||
</li>
|
||
<li class="listitem">
|
||
<code class="computeroutput"><span class="keyword">static</span> <span class="keyword">void</span>
|
||
<span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span>
|
||
<span class="identifier">r</span><span class="special">);</span></code>:
|
||
Sets the pointer to the right node stored in "n" to "r".
|
||
</li>
|
||
</ul></div>
|
||
<p>
|
||
Once we have a node traits configuration we can use <span class="bold"><strong>Boost.Intrusive</strong></span>
|
||
algorithms with our nodes:
|
||
</p>
|
||
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">intrusive</span><span class="special">/</span><span class="identifier">treap_algorithms</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
|
||
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">cassert</span><span class="special">></span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">my_node</span>
|
||
<span class="special">{</span>
|
||
<span class="identifier">my_node</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">priority</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span>
|
||
<span class="special">:</span> <span class="identifier">prio_</span><span class="special">(</span><span class="identifier">priority</span><span class="special">),</span> <span class="identifier">int_</span><span class="special">(</span><span class="identifier">i</span><span class="special">)</span>
|
||
<span class="special">{}</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">parent_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">left_</span><span class="special">,</span> <span class="special">*</span><span class="identifier">right_</span><span class="special">;</span>
|
||
<span class="keyword">int</span> <span class="identifier">prio_</span><span class="special">;</span>
|
||
<span class="comment">//other members</span>
|
||
<span class="keyword">int</span> <span class="identifier">int_</span><span class="special">;</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="comment">//Define our own treap_node_traits</span>
|
||
<span class="keyword">struct</span> <span class="identifier">my_treap_node_traits</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="identifier">node</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">node_ptr</span><span class="special">;</span>
|
||
<span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span> <span class="identifier">const_node_ptr</span><span class="special">;</span>
|
||
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_parent</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_parent</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">parent</span><span class="special">){</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">parent_</span> <span class="special">=</span> <span class="identifier">parent</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_left</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_left</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">left</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">left_</span> <span class="special">=</span> <span class="identifier">left</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="identifier">node_ptr</span> <span class="identifier">get_right</span><span class="special">(</span><span class="identifier">const_node_ptr</span> <span class="identifier">n</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">set_right</span><span class="special">(</span><span class="identifier">node_ptr</span> <span class="identifier">n</span><span class="special">,</span> <span class="identifier">node_ptr</span> <span class="identifier">right</span><span class="special">)</span> <span class="special">{</span> <span class="identifier">n</span><span class="special">-></span><span class="identifier">right_</span> <span class="special">=</span> <span class="identifier">right</span><span class="special">;</span> <span class="special">}</span>
|
||
<span class="special">};</span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">node_ptr_compare</span>
|
||
<span class="special">{</span> <span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">a</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">b</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">a</span><span class="special">-></span><span class="identifier">int_</span> <span class="special"><</span> <span class="identifier">b</span><span class="special">-></span><span class="identifier">int_</span><span class="special">;</span> <span class="special">}</span> <span class="special">};</span>
|
||
|
||
<span class="keyword">struct</span> <span class="identifier">node_ptr_priority</span>
|
||
<span class="special">{</span> <span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">a</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">b</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">a</span><span class="special">-></span><span class="identifier">prio_</span> <span class="special"><</span> <span class="identifier">b</span><span class="special">-></span><span class="identifier">prio_</span><span class="special">;}</span> <span class="special">};</span>
|
||
|
||
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
|
||
<span class="special">{</span>
|
||
<span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">treap_algorithms</span><span class="special"><</span><span class="identifier">my_treap_node_traits</span><span class="special">></span> <span class="identifier">algo</span><span class="special">;</span>
|
||
<span class="identifier">my_node</span> <span class="identifier">header</span><span class="special">,</span> <span class="identifier">two</span><span class="special">(</span><span class="number">2</span><span class="special">,</span> <span class="number">5</span><span class="special">),</span> <span class="identifier">three</span><span class="special">(</span><span class="number">3</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Create an empty treap container:</span>
|
||
<span class="comment">//"header" will be the header node of the tree</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">init_header</span><span class="special">(&</span><span class="identifier">header</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now insert node "two" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_upper_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">two</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">(),</span> <span class="identifier">node_ptr_priority</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now insert node "three" in the tree using the sorting functor</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">insert_equal_lower_bound</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">,</span> <span class="identifier">node_ptr_compare</span><span class="special">(),</span> <span class="identifier">node_ptr_priority</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Now take the first node (the left node of the header)</span>
|
||
<span class="identifier">my_node</span> <span class="special">*</span><span class="identifier">n</span> <span class="special">=</span> <span class="identifier">header</span><span class="special">.</span><span class="identifier">left_</span><span class="special">;</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">two</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Now go to the next node</span>
|
||
<span class="identifier">n</span> <span class="special">=</span> <span class="identifier">algo</span><span class="special">::</span><span class="identifier">next_node</span><span class="special">(</span><span class="identifier">n</span><span class="special">);</span>
|
||
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="special">&</span><span class="identifier">three</span><span class="special">);</span>
|
||
|
||
<span class="comment">//Erase a node just using a pointer to it</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">unlink</span><span class="special">(&</span><span class="identifier">two</span><span class="special">,</span> <span class="identifier">node_ptr_priority</span><span class="special">());</span>
|
||
|
||
<span class="comment">//Erase a node using also the header (faster)</span>
|
||
<span class="identifier">algo</span><span class="special">::</span><span class="identifier">erase</span><span class="special">(&</span><span class="identifier">header</span><span class="special">,</span> <span class="special">&</span><span class="identifier">three</span><span class="special">,</span> <span class="identifier">node_ptr_priority</span><span class="special">());</span>
|
||
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
|
||
<span class="special">}</span>
|
||
</pre>
|
||
<p>
|
||
For a complete list of functions see <code class="computeroutput"><a class="link" href="../boost/intrusive/treap_algorithms.html" title="Class template treap_algorithms">treap_algorithms
|
||
reference</a></code>.
|
||
</p>
|
||
</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 © 2005 Olaf Krzikalla<br>Copyright © 2006-2015 Ion Gaztanaga<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>
|
||
<hr>
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||
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