<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.18"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>AngelScript: ref object</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtreedata.js"></script> <script type="text/javascript" src="navtree.js"></script> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/searchdata.js"></script> <script type="text/javascript" src="search/search.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(function() { init_search(); }); /* @license-end */ </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectlogo"><img alt="Logo" src="aslogo_small.png"/></td> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">AngelScript </div> </td> <td> <div id="MSearchBox" class="MSearchBoxInactive"> <span class="left"> <img id="MSearchSelect" src="search/mag_sel.png" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" alt=""/> <input type="text" id="MSearchField" value="Search" accesskey="S" onfocus="searchBox.OnSearchFieldFocus(true)" onblur="searchBox.OnSearchFieldFocus(false)" onkeyup="searchBox.OnSearchFieldChange(event)"/> </span><span class="right"> <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> </span> </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.18 --> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ var searchBox = new SearchBox("searchBox", "search",false,'Search'); /* @license-end */ </script> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(function(){initNavTree('doc_addon_handle.html',''); initResizable(); }); /* @license-end */ </script> <div id="doc-content"> <!-- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> </div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="javascript:void(0)" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <div class="PageDoc"><div class="header"> <div class="headertitle"> <div class="title">ref object </div> </div> </div><!--header--> <div class="contents"> <div class="textblock"><p><b>Path:</b> /sdk/add_on/scripthandle/</p> <p>The <code>ref</code> type is a generic container that can hold any handle. It is a value type, but behaves very much like an object handle.</p> <p>The type is registered with <code>RegisterScriptHandle(asIScriptEngine*)</code>.</p> <dl class="section see"><dt>See also</dt><dd><a class="el" href="doc_adv_generic_handle.html">Registering a generic handle type</a></dd></dl> <h1><a class="anchor" id="doc_addon_handle_1"></a> Public C++ interface</h1> <div class="fragment"><div class="line"><span class="keyword">class </span>CScriptHandle </div> <div class="line">{</div> <div class="line"><span class="keyword">public</span>:</div> <div class="line"> <span class="comment">// Constructors</span></div> <div class="line"> CScriptHandle();</div> <div class="line"> CScriptHandle(<span class="keyword">const</span> CScriptHandle &other);</div> <div class="line"> CScriptHandle(<span class="keywordtype">void</span> *ref, <span class="keywordtype">int</span> typeId);</div> <div class="line"> ~CScriptHandle();</div> <div class="line"> </div> <div class="line"> <span class="comment">// Copy the stored reference from another handle object</span></div> <div class="line"> CScriptHandle &operator=(<span class="keyword">const</span> CScriptHandle &other);</div> <div class="line"> </div> <div class="line"> <span class="comment">// Set the reference</span></div> <div class="line"> <span class="keywordtype">void</span> Set(<span class="keywordtype">void</span> *ref, <a class="code" href="classas_i_type_info.html">asITypeInfo</a> *type);</div> <div class="line"> </div> <div class="line"> <span class="comment">// Compare equalness</span></div> <div class="line"> <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> CScriptHandle &o) <span class="keyword">const</span>;</div> <div class="line"> <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> CScriptHandle &o) <span class="keyword">const</span>;</div> <div class="line"> <span class="keywordtype">bool</span> opEquals(<span class="keywordtype">void</span> *ref, <span class="keywordtype">int</span> typeId) <span class="keyword">const</span>;</div> <div class="line"> </div> <div class="line"> <span class="comment">// Dynamic cast to desired handle type</span></div> <div class="line"> <span class="keywordtype">void</span> Cast(<span class="keywordtype">void</span> **outRef, <span class="keywordtype">int</span> typeId);</div> <div class="line"> </div> <div class="line"> <span class="comment">// Returns the type of the reference held</span></div> <div class="line"> <a class="code" href="classas_i_type_info.html">asITypeInfo</a> *GetType() <span class="keyword">const</span>;</div> <div class="line"> <span class="keywordtype">int</span> GetTypeId() <span class="keyword">const</span>;</div> <div class="line"> </div> <div class="line"> <span class="comment">// Returns the reference</span></div> <div class="line"> <span class="keywordtype">void</span> *GetRef();</div> <div class="line">};</div> </div><!-- fragment --><h1><a class="anchor" id="doc_addon_handle_3"></a> Public script interface</h1> <dl class="section see"><dt>See also</dt><dd><a class="el" href="doc_datatypes_ref.html">ref in the script language</a></dd></dl> <h1><a class="anchor" id="doc_addon_handle_4"></a> Example usage from C++</h1> <p>Even though the CScriptHandle is a value type, when registering properties of its type they should be registered as handles. The same goes for function arguments and return types.</p> <div class="fragment"><div class="line">CScriptHandle g_handle;</div> <div class="line"> </div> <div class="line"><span class="keywordtype">void</span> Function(CScriptHandle handle)</div> <div class="line">{</div> <div class="line"> ... use the methods of CScriptHandle to determine the <span class="keyword">true</span> <span class="keywordtype">object</span> held in it</div> <div class="line">}</div> <div class="line"> </div> <div class="line"><span class="keywordtype">void</span> Register(<a class="code" href="classas_i_script_engine.html">asIScriptEngine</a> *engine)</div> <div class="line">{</div> <div class="line"> <span class="keywordtype">int</span> r;</div> <div class="line"> r = engine-><a class="code" href="classas_i_script_engine.html#aacd32f32b2922b8ffaed204812013169">RegisterGlobalProperty</a>(<span class="stringliteral">"ref @g_handle"</span>, &g_handle); assert( r >= 0 );</div> <div class="line"> r = engine-><a class="code" href="classas_i_script_engine.html#a2f84b9b51733f22c68b8448b02c2f1c7">RegisterGlobalFunction</a>(<span class="stringliteral">"void Function(ref @)"</span>, <a class="code" href="angelscript_8h.html#a78f8f2c7f1c88b12e74a5ac47b4184ae">asFUNCTION</a>(Function), <a class="code" href="angelscript_8h.html#a3ec92ea3c4762e44c2df788ceccdd1e4a68ae43cc91cdfc3fa4590c9e6164e4f4">asCALL_CDECL</a>); assert( r >= 0 );</div> <div class="line">}</div> </div><!-- fragment --><p>To set an object pointer in the handle from the application, you'll use the Set() method passing a pointer to the object and the type of the object.</p> <p>To retrieve an object pointer from the application you'll use the Cast() method passing in a pointer to the pointer and the wanted type id. If the type id given doesn't match the stored handle the returned pointer will be null.</p> <p>To retrieve an object of an unknown type use the GetType() or GetTypeId() to determine the type stored in the handle, then use the Cast() method. </p> </div></div><!-- contents --> </div><!-- PageDoc --> </div><!-- doc-content --> <div class="ttc" id="aclassas_i_script_engine_html"><div class="ttname"><a href="classas_i_script_engine.html">asIScriptEngine</a></div><div class="ttdoc">The engine interface.</div><div class="ttdef"><b>Definition:</b> angelscript.h:1092</div></div> <div class="ttc" id="aclassas_i_script_engine_html_a2f84b9b51733f22c68b8448b02c2f1c7"><div class="ttname"><a href="classas_i_script_engine.html#a2f84b9b51733f22c68b8448b02c2f1c7">asIScriptEngine::RegisterGlobalFunction</a></div><div class="ttdeci">virtual int RegisterGlobalFunction(const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *auxiliary=0)=0</div><div class="ttdoc">Registers a global function.</div></div> <div class="ttc" id="aclassas_i_script_engine_html_aacd32f32b2922b8ffaed204812013169"><div class="ttname"><a href="classas_i_script_engine.html#aacd32f32b2922b8ffaed204812013169">asIScriptEngine::RegisterGlobalProperty</a></div><div class="ttdeci">virtual int RegisterGlobalProperty(const char *declaration, void *pointer)=0</div><div class="ttdoc">Registers a global property.</div></div> <div class="ttc" id="aangelscript_8h_html_a78f8f2c7f1c88b12e74a5ac47b4184ae"><div class="ttname"><a href="angelscript_8h.html#a78f8f2c7f1c88b12e74a5ac47b4184ae">asFUNCTION</a></div><div class="ttdeci">#define asFUNCTION(f)</div><div class="ttdoc">Returns an asSFuncPtr representing the function specified by the name.</div><div class="ttdef"><b>Definition:</b> angelscript.h:675</div></div> <div class="ttc" id="aclassas_i_type_info_html"><div class="ttname"><a href="classas_i_type_info.html">asITypeInfo</a></div><div class="ttdoc">The interface for describing types This interface is used to describe the types in the script engine.</div><div class="ttdef"><b>Definition:</b> angelscript.h:3527</div></div> <div class="ttc" id="aangelscript_8h_html_a3ec92ea3c4762e44c2df788ceccdd1e4a68ae43cc91cdfc3fa4590c9e6164e4f4"><div class="ttname"><a href="angelscript_8h.html#a3ec92ea3c4762e44c2df788ceccdd1e4a68ae43cc91cdfc3fa4590c9e6164e4f4">asCALL_CDECL</a></div><div class="ttdeci">@ asCALL_CDECL</div><div class="ttdoc">A cdecl function.</div><div class="ttdef"><b>Definition:</b> angelscript.h:226</div></div> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="footer">Generated on Sat Dec 5 2020 23:20:24 for AngelScript by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.18 </li> </ul> </div> </body> </html>