<html> <head> <!-- Generated by the Spirit (http://spirit.sf.net) QuickDoc --> <title>Smart Pointers</title> <link rel="stylesheet" href="theme/style.css" type="text/css"> <link rel="prev" href="exporting_an_entire_header.html"> <link rel="next" href="global_variables.html"> </head> <body> <table width="100%" height="48" border="0" cellspacing="2"> <tr> <td><img src="../../../../boost.png"> </td> <td width="85%"> <font size="6" face="Verdana, Arial, Helvetica, sans-serif"><b>Smart Pointers</b></font> </td> </tr> </table> <br> <table border="0"> <tr> <td width="30"><a href="../index.html"><img src="theme/u_arr.gif" border="0"></a></td> <td width="30"><a href="exporting_an_entire_header.html"><img src="theme/l_arr.gif" border="0"></a></td> <td width="20"><a href="global_variables.html"><img src="theme/r_arr.gif" border="0"></a></td> </tr> </table> <p> Pyste for now has manual support for smart pointers. Suppose:</p> <code><pre> <span class=keyword>struct </span><span class=identifier>C </span><span class=special>{ </span><span class=keyword>int </span><span class=identifier>value</span><span class=special>; }; </span><span class=identifier>boost</span><span class=special>::</span><span class=identifier>shared_ptr</span><span class=special><</span><span class=identifier>C</span><span class=special>> </span><span class=identifier>newC</span><span class=special>(</span><span class=keyword>int </span><span class=identifier>value</span><span class=special>) { </span><span class=identifier>boost</span><span class=special>::</span><span class=identifier>shared_ptr</span><span class=special><</span><span class=identifier>C</span><span class=special>> </span><span class=identifier>c</span><span class=special>( </span><span class=keyword>new </span><span class=identifier>C</span><span class=special>() ); </span><span class=identifier>c</span><span class=special>-></span><span class=identifier>value </span><span class=special>= </span><span class=identifier>value</span><span class=special>; </span><span class=keyword>return </span><span class=identifier>c</span><span class=special>; } </span><span class=keyword>void </span><span class=identifier>printC</span><span class=special>(</span><span class=identifier>boost</span><span class=special>::</span><span class=identifier>shared_ptr</span><span class=special><</span><span class=identifier>C</span><span class=special>> </span><span class=identifier>c</span><span class=special>) { </span><span class=identifier>std</span><span class=special>::</span><span class=identifier>cout </span><span class=special><< </span><span class=identifier>c</span><span class=special>-></span><span class=identifier>value </span><span class=special><< </span><span class=identifier>std</span><span class=special>::</span><span class=identifier>endl</span><span class=special>; } </span></pre></code> <p> To make <tt>newC</tt> and <tt>printC</tt> work correctly, you have to tell Pyste that a convertor for <tt>boost::shared_ptr<C></tt> is needed.</p> <code><pre> <span class=identifier>C </span><span class=special>= </span><span class=identifier>Class</span><span class=special>(</span><span class=literal>'C'</span><span class=special>, </span><span class=literal>'C.h'</span><span class=special>) </span><span class=identifier>use_shared_ptr</span><span class=special>(</span><span class=identifier>C</span><span class=special>) </span><span class=identifier>Function</span><span class=special>(</span><span class=literal>'newC'</span><span class=special>, </span><span class=literal>'C.h'</span><span class=special>) </span><span class=identifier>Function</span><span class=special>(</span><span class=literal>'printC'</span><span class=special>, </span><span class=literal>'C.h'</span><span class=special>) </span></pre></code> <p> For <tt>std::auto_ptr</tt>'s, use the function <tt>use_auto_ptr</tt>.</p> <p> This system is temporary, and in the future the converters will automatically be exported if needed, without the need to tell Pyste about them explicitly.</p> <a name="holders"></a><h2>Holders</h2><p> If only the converter for the smart pointers is not enough and you need to specify the smart pointer as the holder for a class, use the functions <tt>hold_with_shared_ptr</tt> and <tt>hold_with_auto_ptr</tt>:</p> <code><pre> <span class=identifier>C </span><span class=special>= </span><span class=identifier>Class</span><span class=special>(</span><span class=literal>'C'</span><span class=special>, </span><span class=literal>'C.h'</span><span class=special>) </span><span class=identifier>hold_with_shared_ptr</span><span class=special>(</span><span class=identifier>C</span><span class=special>) </span><span class=identifier>Function</span><span class=special>(</span><span class=literal>'newC'</span><span class=special>, </span><span class=literal>'C.h'</span><span class=special>) </span><span class=identifier>Function</span><span class=special>(</span><span class=literal>'printC'</span><span class=special>, </span><span class=literal>'C.h'</span><span class=special>) </span></pre></code> <table border="0"> <tr> <td width="30"><a href="../index.html"><img src="theme/u_arr.gif" border="0"></a></td> <td width="30"><a href="exporting_an_entire_header.html"><img src="theme/l_arr.gif" border="0"></a></td> <td width="20"><a href="global_variables.html"><img src="theme/r_arr.gif" border="0"></a></td> </tr> </table> <br> <hr size="1"><p class="copyright">Copyright © 2003 Bruno da Silva de Oliveira<br>Copyright © 2002-2003 Joel de Guzman<br><br> <font size="2">Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) </font> </p> </body> </html>