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- <p>
- References are functions. They hold a reference to a value stored somewhere.
- For example, given:
- </p>
- <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>
- <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>
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- <p>
- we create <code class="computeroutput"><span class="identifier">references</span></code> to
- <code class="computeroutput"><span class="identifier">i</span></code> and <code class="computeroutput"><span class="identifier">s</span></code>
- this way:
- </p>
- <pre class="programlisting"><span class="identifier">ref</span><span class="special">(</span><span class="identifier">i</span><span class="special">)</span>
- <span class="identifier">ref</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span>
- </pre>
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- Like <code class="computeroutput"><span class="identifier">val</span></code>, the expressions
- above evaluates to a nullary function; the first one returning an <code class="computeroutput"><span class="keyword">int</span><span class="special">&</span></code>,
- and the second one returning a <code class="computeroutput"><span class="keyword">char</span>
- <span class="keyword">const</span><span class="special">*&</span></code>.
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- (See <a href="../../../../../example/references.cpp" target="_top">references.cpp</a>)
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