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| <td class="back"><a id="top"></a><a href="s3.1.i.html" rel="prev"><< §3.1.(i) Shorthand definition</a></td> |
| <td class="top"><a href="index.html" rel="contents">↑ Table of Contents ↑</a></td> |
| <td class="next"><a href="s3.1.k.html" rel="next">§3.1.(k) Callout to generic method >></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="s3.1.html" rel="section">§3.1 Callout method binding</a></div> |
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| <h4 class="subsect">§3.1.(j) <span class="title">Inferred callout</span><a class="img" href="s3.1.j.html" title="PermaLink to (j) Inferred callout"><img style="vertical-align:text-top;margin-left:5px;" src="../images/permalink.png" |
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| <p> If a non-abstract role class inherits an abstract method the compiler |
| tries to infer a callout binding for implementing the abstract method. |
| Similarly, if a self-call in a role class cannot be resolved, the compiler |
| tries to infer a callout to resolve the self-call.<br /> |
| Inference searches for a method in the bound base class such that |
| |
| </p> |
| <ol> |
| <li>both methods have the same name</li> |
| <li>both methods have the same number of arguments</li> |
| <li>each argument of the abstract role method is compatible to the |
| corresponding argument of the base method directly, or using |
| boxing/unboxing or lowering. |
| </li> |
| </ol> |
| <p> |
| Callouts inferred from an interface have <code>public</code> visibility, |
| callouts inferred from a self-call have <code>private</code> visibility. |
| |
| </p> |
| <p> |
| Per default inferred callout bindings are disabled, i.e., a compiler |
| must report these as an error. However, a compiler should allow to |
| configure reporting to produce a warning only (which can be suppressed |
| using a <code>@SuppressWarnings("inferredcallout")</code> annotation), |
| or to completely ignore the diagnostic. |
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| width="88" /></a><address>© Stephan Herrmann, Christine Hundt, Marco Mosconi</address> |
| OT/J version 1.3 — last modified: 2011-03-10 |
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