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| <title>OT/J Language Definition v1.3</title> |
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| <td class="back"><a id="top"></a><a href="s1.2.2.c.html" rel="prev"><< §1.2.2.(c) Immutable anchor</a></td> |
| <td class="top"><a href="index.html" rel="contents">↑ Table of Contents ↑</a></td> |
| <td class="next"><a href="s1.2.2.e.html" rel="next">§1.2.2.(e) Conformance >></a></td> |
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| <div class="breadcrumb"><a class="nav" href="s1.html" rel="section">§1 Teams and Roles</a> > <a class="nav" href="s1.2.html" rel="section">§1.2 Role classes and objects</a> > <a class="nav" href="s1.2.2.html" rel="section">§1.2.2 Externalized roles</a></div> |
| <div class="subsect depth4" id="s1.2.2.d"> |
| <h4 class="subsect">§1.2.2.(d) <span class="title">Implicit type anchors</span><a class="img" href="s1.2.2.d.html" |
| title="PermaLink to (d) Implicit type anchors"><img style="vertical-align:text-top;margin-left:5px;" src="../images/permalink.png" |
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| <p>The current team instance can be used as a default anchor |
| for role types: |
| |
| </p> |
| <ol> |
| <li>In non-static team level methods role types are by default interpreted as anchored to <code>this</code> (referring to the team instance). I.e., the following two declarations express the same: |
| |
| <div class="listing plain"><pre><b>public</b> RoleX getRoleX (RoleY r) { <i> stmts </i> } |
| <b>public</b> RoleX<@<em>this</em>> getRoleX (RoleY<@<em>this</em>> r) { <i> stmts </i> }</pre></div> |
| </li> |
| <li> |
| In analogy, <em>role methods</em> use the enclosing team instance as the |
| default anchor for any role types. |
| </li> |
| </ol> |
| <p>Note, that <code>this</code> and <code><em>Outer</em>.this</code> are always |
| <code>final</code>.<br /> |
| The compiler uses the pseudo identifier <strong><code>tthis</code></strong> to denote |
| such implicit type anchors in error messages. |
| |
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| <div class="breadcrumb"><a class="nav" href="s1.html" rel="section">§1 Teams and Roles</a> > <a class="nav" href="s1.2.html" rel="section">§1.2 Role classes and objects</a> > <a class="nav" href="s1.2.2.html" rel="section">§1.2.2 Externalized roles</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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