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From: Arvid N. <ar...@us...> - 2005-10-26 16:10:35
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Update of /cvsroot/luabind/luabind/luabind/doc In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv24965/doc Modified Files: Tag: beta7-devel2 docs.html docs.rst Log Message: properties now make the returned reference keep the object alive using the dependency policy Index: docs.html =================================================================== RCS file: /cvsroot/luabind/luabind/luabind/doc/docs.html,v retrieving revision 1.52.2.10 retrieving revision 1.52.2.11 diff -u -d -r1.52.2.10 -r1.52.2.11 --- docs.html 26 Oct 2005 09:44:23 -0000 1.52.2.10 +++ docs.html 26 Oct 2005 16:10:26 -0000 1.52.2.11 @@ -7,7 +7,7 @@ <title>luabind</title> <meta name="author" content="Daniel Wallin, Arvid Norberg" /> <meta name="copyright" content="Copyright Daniel Wallin, Arvid Norberg 2003." /> -<meta name="date" content="2005-10-24" /> +<meta name="date" content="2005-10-26" /> <link rel="stylesheet" href="style.css" type="text/css" /> </head> <body> @@ -22,9 +22,9 @@ <tr><th class="docinfo-name">Copyright:</th> <td>Copyright Daniel Wallin, Arvid Norberg 2003.</td></tr> <tr><th class="docinfo-name">Date:</th> -<td>2005-10-24</td></tr> +<td>2005-10-26</td></tr> <tr><th class="docinfo-name">Revision:</th> -<td>1.25.2.11</td></tr> +<td>1.25.2.12</td></tr> <tr class="field"><th class="docinfo-name">License:</th><td class="field-body"><p class="first">Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation @@ -639,7 +639,10 @@ assert(b.a.m == 1) </pre> <p>This requires the first lookup (on <tt class="docutils literal"><span class="pre">a</span></tt>) to return a reference to <tt class="docutils literal"><span class="pre">A</span></tt>, and -not a copy.</p> +not a copy. In that case, luabind will automatically use the dependency policy +to make the return value dependent on the object in which it is stored. So, if +the returned reference lives longer than all references to the object (b in +this case) it will keep the object alive, to avoid being a dangling pointer.</p> <p>You can also register getter and setter functions and make them look as if they were a public data member. Consider the following class:</p> <pre class="literal-block"> Index: docs.rst =================================================================== RCS file: /cvsroot/luabind/luabind/luabind/doc/docs.rst,v retrieving revision 1.25.2.12 retrieving revision 1.25.2.13 diff -u -d -r1.25.2.12 -r1.25.2.13 --- docs.rst 26 Oct 2005 09:44:23 -0000 1.25.2.12 +++ docs.rst 26 Oct 2005 16:10:26 -0000 1.25.2.13 @@ -622,7 +622,10 @@ assert(b.a.m == 1) This requires the first lookup (on ``a``) to return a reference to ``A``, and -not a copy. +not a copy. In that case, luabind will automatically use the dependency policy +to make the return value dependent on the object in which it is stored. So, if +the returned reference lives longer than all references to the object (b in +this case) it will keep the object alive, to avoid being a dangling pointer. You can also register getter and setter functions and make them look as if they were a public data member. Consider the following class:: |
