| <!DOCTYPE html |
| PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "../xhtml1-strict.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> |
| <link rel="stylesheet" type="text/css" href="../css/ot.css" /> |
| <link rel="stylesheet" type="text/css" href="../css/otjld.css" /> |
| <title>OT/J Language Definition v1.3</title> |
| </head> |
| <body class="otdt"> |
| <div id="content"> |
| <table class="nav"> |
| <tr> |
| <td class="back"><a id="top"></a><a href="s1.5.d.html" rel="prev"><< §1.5.(d) Prohibition of name clashes</a></td> |
| <td class="top"><a href="index.html" rel="contents">↑ Table of Contents ↑</a></td> |
| <td class="next"><a href="s1.5.f.html" rel="next">§1.5.(f) Qualified tsuper >></a></td> |
| </tr> |
| </table> |
| <div class="breadcrumb"><a class="nav" href="s1.html" rel="section">§1 Teams and Roles</a> > <a class="nav" href="s1.5.html" rel="section">§1.5 Team and role nesting</a></div> |
| <div class="subsect depth3" id="s1.5.e"> |
| <h4 class="subsect">§1.5.(e) <span class="title">Precedence among different supers</span><a class="img" href="s1.5.e.html" |
| title="PermaLink to (e) Precedence among different supers"><img style="vertical-align:text-top;margin-left:5px;" src="../images/permalink.png" |
| alt="" /></a></h4> |
| <p>If a role inherits the same feature from several super roles (super and tsuper), |
| an implicitly inherited version always overrides any explicitly inherited feature. <br /> |
| Also implicit inheritance alone may produce several candidate methods inherited by a role class. |
| This is a result of team-nesting where each level of nesting may add one more tsuper role. |
| In that case inner team inheritance has precedence over outer team inheritance. |
| |
| </p> |
| <div class="codecomment"> |
| <table> |
| <colgroup span="1"> |
| <col align="left" span="1" /> |
| <col align="center" span="1" /> |
| </colgroup> |
| <tr> |
| <td valign="top" rowspan="1" colspan="1"> |
| <p>In the above example (<a href="s1.html#l1.5" class="listing">Listing 1.5</a>) role <code class="small">OuterTeam.RoleAndTeamSub.InnerRole</code> has two direct tsuper roles: <code class="small">OuterTeam.RoleAndTeam.InnerRole</code> and <code class="small">SuperOuter.RoleAndTeamSub.InnerRole</code>. Without the method <code>foo</code> defined in lines 27-30, the enclosing class <code class="small">OuterTeam.RoleAndTeamSub.InnerRole</code> would inherit the method <code>foo</code> defined in line 16, because the inner inheritance between <code>RoleAndTeamSub</code> and <code>RoleAndTeam</code> binds stronger than the outer inheritance between <code>OuterTeam</code> and <code>SuperOuter</code>. |
| </p> |
| </td> |
| <td rowspan="1" colspan="1"><img src="../images/team_nesting_hor.png" alt="Example diagram team nesting" /></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <table class="nav"> |
| <tr> |
| <td class="back"><a href="s1.5.d.html" rel="prev"><< §1.5.(d) Prohibition of name clashes</a></td> |
| <td class="top"><a href="index.html" rel="contents">↑ Table of Contents ↑</a></td> |
| <td class="next"><a href="s1.5.f.html" rel="next">§1.5.(f) Qualified tsuper >></a></td> |
| </tr> |
| </table> |
| <div class="breadcrumb"><a class="nav" href="s1.html" rel="section">§1 Teams and Roles</a> > <a class="nav" href="s1.5.html" rel="section">§1.5 Team and role nesting</a></div> |
| </div> |
| <div id="footer"> |
| <hr /><a class="w3c img" href="http://jigsaw.w3.org/css-validator/check/referer" |
| shape="rect"><img src="../images/valid-css2-blue.png" alt="Valid CSS!" height="31" width="88" /></a><a class="w3c img" href="http://validator.w3.org/check?uri=referer" shape="rect"><img src="../images/valid-xhtml10-blue.png" alt="Valid XHTML 1.0 Strict" height="31" |
| width="88" /></a><address>© Stephan Herrmann, Christine Hundt, Marco Mosconi</address> |
| OT/J version 1.3 — last modified: 2010-05-18 |
| </div> |
| </body> |
| </html> |