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29<p>
30        References are functions. They hold a reference to a value stored somewhere.
31        For example, given:
32      </p>
33<pre class="programlisting"><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">3</span><span class="special">;</span>
34<span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">s</span> <span class="special">=</span> <span class="string">"Hello World"</span><span class="special">;</span>
35</pre>
36<p>
37        we create <code class="computeroutput"><span class="identifier">references</span></code> to
38        <code class="computeroutput"><span class="identifier">i</span></code> and <code class="computeroutput"><span class="identifier">s</span></code>
39        this way:
40      </p>
41<pre class="programlisting"><span class="identifier">ref</span><span class="special">(</span><span class="identifier">i</span><span class="special">)</span>
42<span class="identifier">ref</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span>
43</pre>
44<p>
45        Like <code class="computeroutput"><span class="identifier">val</span></code>, the expressions
46        above evaluates to a nullary function; the first one returning an <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;</span></code>,
47        and the second one returning a <code class="computeroutput"><span class="keyword">char</span>
48        <span class="keyword">const</span><span class="special">*&amp;</span></code>.
49      </p>
50<p>
51        (See <a href="../../../../example/references.cpp" target="_top">references.cpp</a>)
52      </p>
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55<p>
56        <span class="inlinemediaobject"><img src="../../images/tip.png" alt="tip"></span> Learn more about references <a class="link" href="../modules/core/references.html" title="References">here.</a>
57      </p>
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62<td align="right"><div class="copyright-footer">Copyright &#169; 2002-2005, 2010 Joel de Guzman, Dan Marsden, Thomas Heller<p>
63        Distributed under the Boost Software License, Version 1.0. (See accompanying
64        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>)
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