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| <td class="back"><a id="top"></a><a href="s1.2.2.a.html" rel="prev"><< §1.2.2.(a) Visibility</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.b"> |
| <h4 class="subsect">§1.2.2.(b) <span class="title">Declaration with anchored type</span><a class="img" href="s1.2.2.b.html" |
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| <p>Outside a team role types are legal only if denoted relative |
| to an existing team instance (further on called "anchored types"). |
| The syntax is: |
| </p> |
| <div class="listing plain"><pre><em>final</em> MyTeam myTeam = <i>expression</i>; |
| <em>RoleClass<@myTeam></em> role = <i>expression</i>;</pre></div> |
| <p>The syntax <code>Type<@anchor></code> is a special case of a parameterized type, more specifically a <a href="s9.html" title="§9 Value Dependent Classes" class="sect">value dependent type (§9)</a>. |
| The type argument (i.e., the expression after the at-sign) can be a simple name or a path. It must refer to an instance |
| of a team class. |
| The role type is said to be <em>anchored</em> to this team instance.<br /> |
| The type-part of this syntax (in front of the angle brackets) must be the simple name of a role type directly contained |
| in the given team (including roles that are acquired by implicit inheritance).<br /></p> |
| <div class="note"> |
| <h5>Note:</h5> |
| Previous versions of the OTJLD used a different syntax for anchored types, where the role type was prefixed with the anchor |
| expression, separated by a dot (<code>anchor.Type</code>, |
| see <a href="sA.html#sA.6.3" title="§A.6.3 AnchoredType" class="sect">§A.6.3</a>). A compiler may still support that path syntax but it should be flagged as being deprecated. |
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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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| OT/J version 1.3 — last modified: 2011-05-15 |
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