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<a name="high_level_components.enum_hpp.example"></a><a class="link" href="example.html" title="Example">Example</a>
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<p>
C++ module definition
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">/</span><span class="keyword">enum</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">/</span><span class="identifier">def</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">/</span><span class="identifier">module</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">;</span>
<span class="keyword">enum</span> <span class="identifier">color</span> <span class="special">{</span> <span class="identifier">red</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">green</span> <span class="special">=</span> <span class="number">2</span><span class="special">,</span> <span class="identifier">blue</span> <span class="special">=</span> <span class="number">4</span> <span class="special">};</span>
<span class="identifier">color</span> <span class="identifier">identity_</span><span class="special">(</span><span class="identifier">color</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span> <span class="special">}</span>
<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">enums</span><span class="special">)</span>
<span class="special">{</span>
<span class="identifier">enum_</span><span class="special">&lt;</span><span class="identifier">color</span><span class="special">&gt;(</span><span class="string">"color"</span><span class="special">)</span>
<span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="string">"red"</span><span class="special">,</span> <span class="identifier">red</span><span class="special">)</span>
<span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="string">"green"</span><span class="special">,</span> <span class="identifier">green</span><span class="special">)</span>
<span class="special">.</span><span class="identifier">export_values</span><span class="special">()</span>
<span class="special">.</span><span class="identifier">value</span><span class="special">(</span><span class="string">"blue"</span><span class="special">,</span> <span class="identifier">blue</span><span class="special">)</span>
<span class="special">;</span>
<span class="identifier">def</span><span class="special">(</span><span class="string">"identity"</span><span class="special">,</span> <span class="identifier">identity_</span><span class="special">);</span>
<span class="special">}</span>
</pre>
<p>
Interactive Python:
</p>
<pre class="programlisting"><span class="special">&gt;&gt;&gt;</span> <span class="identifier">from</span> <span class="identifier">enums</span> <span class="identifier">import</span> <span class="special">*</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">red</span><span class="special">)</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">red</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">red</span><span class="special">)</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">red</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">green</span><span class="special">)</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">green</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">green</span><span class="special">)</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">green</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">blue</span><span class="special">)</span>
<span class="identifier">Traceback</span> <span class="special">(</span><span class="identifier">most</span> <span class="identifier">recent</span> <span class="identifier">call</span> <span class="identifier">last</span><span class="special">):</span>
<span class="identifier">File</span> <span class="string">"&lt;stdin&gt;"</span><span class="special">,</span> <span class="identifier">line</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">in</span> <span class="special">?</span>
<span class="identifier">NameError</span><span class="special">:</span> <span class="identifier">name</span> <span class="char">'blue'</span> <span class="identifier">is</span> <span class="keyword">not</span> <span class="identifier">defined</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">blue</span><span class="special">)</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">blue</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">color</span><span class="special">(</span><span class="number">1</span><span class="special">))</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">red</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">color</span><span class="special">(</span><span class="number">2</span><span class="special">))</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">green</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">color</span><span class="special">(</span><span class="number">3</span><span class="special">))</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">(</span><span class="number">3</span><span class="special">)</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="identifier">color</span><span class="special">(</span><span class="number">4</span><span class="special">))</span>
<span class="identifier">enums</span><span class="special">.</span><span class="identifier">color</span><span class="special">.</span><span class="identifier">blue</span>
<span class="special">&gt;&gt;&gt;</span> <span class="identifier">identity</span><span class="special">(</span><span class="number">1</span><span class="special">)</span>
<span class="identifier">Traceback</span> <span class="special">(</span><span class="identifier">most</span> <span class="identifier">recent</span> <span class="identifier">call</span> <span class="identifier">last</span><span class="special">):</span>
<span class="identifier">File</span> <span class="string">"&lt;stdin&gt;"</span><span class="special">,</span> <span class="identifier">line</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">in</span> <span class="special">?</span>
<span class="identifier">TypeError</span><span class="special">:</span> <span class="identifier">bad</span> <span class="identifier">argument</span> <span class="identifier">type</span> <span class="keyword">for</span> <span class="identifier">built</span><span class="special">-</span><span class="identifier">in</span> <span class="identifier">operation</span>
</pre>
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