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<div class="title">Registering object methods </div> </div>
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<div class="textblock"><p>Class methods are registered with the RegisterObjectMethod call. Both non-virtual and virtual methods are registered the same way.</p>
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<p>Static class methods are in reality global functions so those should be <a class="el" href="doc_register_func.html">registered as global functions</a> and not as object methods.</p>
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<div class="fragment"><div class="line"><span class="comment">// Register a class method</span></div>
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<div class="line"><span class="keywordtype">void</span> MyClass::ClassMethod()</div>
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<div class="line">{</div>
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<div class="line"> <span class="comment">// Do something</span></div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line">r = engine-><a class="code" href="classas_i_script_engine.html#ad74043be9cc30f105c62f482ca720574">RegisterObjectMethod</a>(<span class="stringliteral">"mytype"</span>, <span class="stringliteral">"void ClassMethod()"</span>, <a class="code" href="angelscript_8h.html#a7345e6b3afabec24efd0ff77886d49a6">asMETHOD</a>(MyClass,ClassMethod), <a class="code" href="angelscript_8h.html#a3ec92ea3c4762e44c2df788ceccdd1e4aea516c8742acc1edff6a43dc1bb09e96">asCALL_THISCALL</a>); assert( r >= 0 );</div>
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</div><!-- fragment --><p>It is also possible to register a global function that takes a pointer to the object as a class method. This can be used to extend the functionality of a class when accessed via AngelScript, without actually changing the C++ implementation of the class.</p>
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<div class="fragment"><div class="line"><span class="comment">// Register a global function as an object method</span></div>
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<div class="line"><span class="keywordtype">void</span> MyClass_MethodWrapper(MyClass *obj)</div>
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<div class="line">{</div>
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<div class="line"> <span class="comment">// Access the object</span></div>
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<div class="line"> obj->DoSomething();</div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line">r = engine-><a class="code" href="classas_i_script_engine.html#ad74043be9cc30f105c62f482ca720574">RegisterObjectMethod</a>(<span class="stringliteral">"mytype"</span>, <span class="stringliteral">"void MethodWrapper()"</span>, <a class="code" href="angelscript_8h.html#a78f8f2c7f1c88b12e74a5ac47b4184ae">asFUNCTION</a>(MyClass_MethodWrapper), <a class="code" href="angelscript_8h.html#a3ec92ea3c4762e44c2df788ceccdd1e4ac08652c72f1cc0dc81c37812fab0e253">asCALL_CDECL_OBJLAST</a>); assert( r >= 0 );</div>
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</div><!-- fragment --><dl class="section see"><dt>See also</dt><dd><a class="el" href="doc_register_func.html">Registering a function</a> for more details on how the macros work.</dd></dl>
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<h1><a class="anchor" id="doc_reg_objmeth_composite"></a>
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Composite members</h1>
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<p>If the application class that is being registered uses composition, then it is possible to register the methods of the composite members like this:</p>
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<div class="fragment"><div class="line"><span class="keyword">struct </span>Component</div>
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<div class="line">{</div>
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<div class="line"> <span class="keywordtype">int</span> DoSomething();</div>
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<div class="line">};</div>
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<div class="line"> </div>
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<div class="line"><span class="keyword">struct </span>Object</div>
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<div class="line">{</div>
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<div class="line"> Component *comp;</div>
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<div class="line">};</div>
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<div class="line"> </div>
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<div class="line">r = engine-><a class="code" href="classas_i_script_engine.html#ad74043be9cc30f105c62f482ca720574">RegisterObjectMethod</a>(<span class="stringliteral">"object"</span>, <span class="stringliteral">"int DoSomething()"</span>, <a class="code" href="angelscript_8h.html#a7345e6b3afabec24efd0ff77886d49a6">asMETHOD</a>(Component, DoSomething), <a class="code" href="angelscript_8h.html#a3ec92ea3c4762e44c2df788ceccdd1e4aea516c8742acc1edff6a43dc1bb09e96">asCALL_THISCALL</a>, 0, <a class="code" href="angelscript_8h.html#a717eccea17214bc1eb64bb9789c4915a">asOFFSET</a>(Object, comp), <span class="keyword">true</span>); assert( r >= 0 );</div>
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</div><!-- fragment --><p>The last parameter indicates that to reach the composite member it is necessary to dereference the pointer. If the composite member is inlined, then the parameter should be set to false. </p>
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<div class="ttc" id="aclassas_i_script_engine_html_ad74043be9cc30f105c62f482ca720574"><div class="ttname"><a href="classas_i_script_engine.html#ad74043be9cc30f105c62f482ca720574">asIScriptEngine::RegisterObjectMethod</a></div><div class="ttdeci">virtual int RegisterObjectMethod(const char *obj, const char *declaration, const asSFuncPtr &funcPointer, asDWORD callConv, void *auxiliary=0, int compositeOffset=0, bool isCompositeIndirect=false)=0</div><div class="ttdoc">Registers a method for the object type.</div></div>
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<div class="ttc" id="aangelscript_8h_html_a3ec92ea3c4762e44c2df788ceccdd1e4ac08652c72f1cc0dc81c37812fab0e253"><div class="ttname"><a href="angelscript_8h.html#a3ec92ea3c4762e44c2df788ceccdd1e4ac08652c72f1cc0dc81c37812fab0e253">asCALL_CDECL_OBJLAST</a></div><div class="ttdeci">@ asCALL_CDECL_OBJLAST</div><div class="ttdoc">A cdecl function that takes the object pointer as the last parameter.</div><div class="ttdef"><b>Definition:</b> angelscript.h:234</div></div>
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<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>
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<div class="ttc" id="aangelscript_8h_html_a7345e6b3afabec24efd0ff77886d49a6"><div class="ttname"><a href="angelscript_8h.html#a7345e6b3afabec24efd0ff77886d49a6">asMETHOD</a></div><div class="ttdeci">#define asMETHOD(c, m)</div><div class="ttdoc">Returns an asSFuncPtr representing the class method specified by class and method name.</div><div class="ttdef"><b>Definition:</b> angelscript.h:740</div></div>
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<div class="ttc" id="aangelscript_8h_html_a3ec92ea3c4762e44c2df788ceccdd1e4aea516c8742acc1edff6a43dc1bb09e96"><div class="ttname"><a href="angelscript_8h.html#a3ec92ea3c4762e44c2df788ceccdd1e4aea516c8742acc1edff6a43dc1bb09e96">asCALL_THISCALL</a></div><div class="ttdeci">@ asCALL_THISCALL</div><div class="ttdoc">A thiscall class method.</div><div class="ttdef"><b>Definition:</b> angelscript.h:232</div></div>
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<div class="ttc" id="aangelscript_8h_html_a717eccea17214bc1eb64bb9789c4915a"><div class="ttname"><a href="angelscript_8h.html#a717eccea17214bc1eb64bb9789c4915a">asOFFSET</a></div><div class="ttdeci">#define asOFFSET(s, m)</div><div class="ttdoc">Returns the offset of an attribute in a struct.</div><div class="ttdef"><b>Definition:</b> angelscript.h:672</div></div>
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