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| <td class="back"><a id="top"></a><a href="s3.2.b.html" rel="prev"><< §3.2.(b) Mapping one parameter</a></td> |
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| <div class="breadcrumb"><a class="nav" href="s3.html" rel="section">§3 Callout Binding</a> > <a class="nav" href="s3.2.html" rel="section">§3.2 Callout parameter mapping</a></div> |
| <div class="subsect depth3" id="s3.2.c"> |
| <h4 class="subsect">§3.2.(c) <span class="title">Result mapping</span><a class="img" href="s3.2.c.html" title="PermaLink to (c) Result mapping"><img style="vertical-align:text-top;margin-left:5px;" src="../images/permalink.png" |
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| <p>The return value of a callout method may be provided by a result mapping: |
| |
| </p> |
| <div class="listing plain"><pre>result <b><-</b> <i>expression</i></pre></div> |
| <p>The right hand side expression of a result mapping may use the special identifier |
| <code>result</code> to refer to the value returned by the base method. |
| <br /> |
| In a method binding with parameter mappings, it is an error to use |
| <code>result</code> as the name of a regular method argument. |
| |
| </p> |
| <h5 class="listing">Example code (Callout Parameter Mapping):</h5> |
| <div class="listing example frame"> |
| <table class="listing"> |
| <tr class="line odd"> |
| <td class="ln">1</td> |
| <td><pre>Integer absoluteValue(Integer integer) <b>-></b> <b>int</b> abs(<b>int</b> i) <em><b>with</b> {</em></pre></td> |
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| <td class="ln">2</td> |
| <td><pre> integer.intValue() <b>-></b> i,</pre></td> |
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| <td class="ln">3</td> |
| <td><pre> <em>result</em> <b><-</b> <b>new</b> Integer(<em>result</em>)</pre></td> |
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| <td class="ln">4</td> |
| <td><pre><em>}</em></pre></td> |
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| <div class="breadcrumb"><a class="nav" href="s3.html" rel="section">§3 Callout Binding</a> > <a class="nav" href="s3.2.html" rel="section">§3.2 Callout parameter mapping</a></div> |
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| width="88" /></a><address>© Stephan Herrmann, Christine Hundt, Marco Mosconi</address> |
| OT/J version 1.3 — last modified: 2011-05-15 |
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