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53 <div class="title">sigc::adapts&lt; T_functor &gt; Struct Template Reference<div class="ingroups"><a class="el" href="group__adaptors.html">Adaptors</a></div></div>  </div>
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55 <div class="contents">
56
57 <p>Base type for adaptors.  
58  <a href="structsigc_1_1adapts.html#details">More...</a></p>
59
60 <p><code>#include &lt;sigc++/adaptors/adaptor_trait.h&gt;</code></p>
61 <div class="dynheader">
62 Inheritance diagram for sigc::adapts&lt; T_functor &gt;:</div>
63 <div class="dyncontent">
64 <div class="center"><img src="structsigc_1_1adapts__inherit__graph.png" border="0" usemap="#asigc_1_1adapts_3_01T__functor_01_4_inherit__map" alt="Inheritance graph"/></div>
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68 <area shape="rect" href="structsigc_1_1bind__functor_3-1_00_01T__functor_00_01T__type1_00_01nil_00_01nil_00_01nil_00_01nil_00_01nil_00_01nil_01_4.html" title="Adaptor that binds 1 argument(s) to the wrapped functor." alt="" coords="641,85,820,141"/>
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77 <area shape="rect" href="classsigc_1_1track__obj__functor1.html" title="track_obj_functor1 wraps a functor and stores a reference to a trackable object." alt="" coords="642,765,819,806"/>
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81 <area shape="rect" href="classsigc_1_1track__obj__functor3.html" title="track_obj_functor3 wraps a functor and stores 3 references to trackable objects." alt="" coords="909,637,1087,693"/>
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84 <area shape="rect" href="classsigc_1_1track__obj__functor6.html" title="track_obj_functor6 wraps a functor and stores 6 references to trackable objects." alt="" coords="909,878,1087,949"/>
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89 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
90 Public Types</h2></td></tr>
91 <tr class="memitem:a5c3f3b614455552f4cd5d88b1f330248"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1adaptor__trait.html">adaptor_trait</a>&lt; T_functor &gt;::<a class="el" href="structsigc_1_1adapts.html#a5c3f3b614455552f4cd5d88b1f330248">adaptor_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1adapts.html#a5c3f3b614455552f4cd5d88b1f330248">adaptor_type</a></td></tr>
92 <tr class="separator:a5c3f3b614455552f4cd5d88b1f330248"><td class="memSeparator" colspan="2">&#160;</td></tr>
93 <tr class="memitem:a914e75556dae1fdcf0162c4c99aca79d"><td class="memItemLeft" align="right" valign="top">typedef <a class="el" href="structsigc_1_1adaptor__trait.html">adaptor_trait</a>&lt; T_functor &gt;::<a class="el" href="structsigc_1_1adapts.html#a914e75556dae1fdcf0162c4c99aca79d">result_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1adapts.html#a914e75556dae1fdcf0162c4c99aca79d">result_type</a></td></tr>
94 <tr class="separator:a914e75556dae1fdcf0162c4c99aca79d"><td class="memSeparator" colspan="2">&#160;</td></tr>
95 </table><table class="memberdecls">
96 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
97 Public Member Functions</h2></td></tr>
98 <tr class="memitem:a947b69ccbdcabd4ef4163dcab96096f8"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1adapts.html#a947b69ccbdcabd4ef4163dcab96096f8">adapts</a> (const T_functor &amp; _A_functor)</td></tr>
99 <tr class="memdesc:a947b69ccbdcabd4ef4163dcab96096f8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructs an adaptor that wraps the passed functor.  <a href="structsigc_1_1adapts.html#a947b69ccbdcabd4ef4163dcab96096f8">More...</a><br /></td></tr>
100 <tr class="separator:a947b69ccbdcabd4ef4163dcab96096f8"><td class="memSeparator" colspan="2">&#160;</td></tr>
101 </table><table class="memberdecls">
102 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
103 Public Attributes</h2></td></tr>
104 <tr class="memitem:a2f4b37eb160708baf17de57f2abce7a7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1adapts.html#a5c3f3b614455552f4cd5d88b1f330248">adaptor_type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1adapts.html#a2f4b37eb160708baf17de57f2abce7a7">functor_</a></td></tr>
105 <tr class="memdesc:a2f4b37eb160708baf17de57f2abce7a7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Adaptor that is invoked from operator()().  <a href="structsigc_1_1adapts.html#a2f4b37eb160708baf17de57f2abce7a7">More...</a><br /></td></tr>
106 <tr class="separator:a2f4b37eb160708baf17de57f2abce7a7"><td class="memSeparator" colspan="2">&#160;</td></tr>
107 </table>
108 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
109 <div class="textblock"><h3>template&lt;class T_functor&gt;<br />
110 struct sigc::adapts&lt; T_functor &gt;</h3>
111
112 <p>Base type for adaptors. </p>
113 <p><a class="el" href="structsigc_1_1adapts.html" title="Base type for adaptors.">sigc::adapts</a> wraps adaptors, functors, function pointers and class methods. It contains a single member functor which is always a <a class="el" href="structsigc_1_1adaptor__base.html" title="A hint to the compiler.">sigc::adaptor_base</a>. The typedef adaptor_type defines the exact type that is used to store the adaptor, functor, function pointer or class method passed into the constructor. It differs from <em>T_functor</em> unless <em>T_functor</em> inherits from <a class="el" href="structsigc_1_1adaptor__base.html" title="A hint to the compiler.">sigc::adaptor_base</a>.</p>
114 <dl class="section user"><dt>Example of a simple adaptor:</dt><dd><div class="fragment"><div class="line"><span class="keyword">namespace </span>my_ns</div>
115 <div class="line">{</div>
116 <div class="line"><span class="keyword">template</span> &lt;<span class="keyword">class</span> T_functor&gt;</div>
117 <div class="line"><span class="keyword">struct </span>my_adaptor : <span class="keyword">public</span> <a class="code" href="structsigc_1_1adapts.html">sigc::adapts</a>&lt;T_functor&gt;</div>
118 <div class="line">{</div>
119 <div class="line">  <span class="keyword">template</span> &lt;<span class="keyword">class</span> T_arg1=<span class="keywordtype">void</span>, <span class="keyword">class</span> T_arg2=<span class="keywordtype">void</span>&gt;</div>
120 <div class="line">  <span class="keyword">struct </span>deduce_result_type</div>
121 <div class="line">  { <span class="keyword">typedef</span> <a class="code" href="namespacesigc.html#ab7791439fb79592300826fe076a8e3d1">sigc::deduce_result_t&lt;T_functor, T_arg1, T_arg2&gt;</a> type; };</div>
122 <div class="line">  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="structsigc_1_1functor__trait.html#af1324bf0d3cec3d1f2e39e932b228d6d">sigc::functor_trait&lt;T_functor&gt;::result_type</a> <a class="code" href="structsigc_1_1adapts.html#a914e75556dae1fdcf0162c4c99aca79d">result_type</a>;</div>
123 <div class="line">  <span class="comment">//</span></div>
124 <div class="line">  <a class="code" href="structsigc_1_1adapts.html#a914e75556dae1fdcf0162c4c99aca79d">result_type</a></div>
125 <div class="line">  operator()() <span class="keyword">const</span>;</div>
126 <div class="line">  <span class="comment">//</span></div>
127 <div class="line">  <span class="keyword">template</span> &lt;<span class="keyword">class</span> T_arg1&gt;</div>
128 <div class="line">  <span class="keyword">typename</span> <a class="code" href="structsigc_1_1deduce__result__type.html#a529a6b7809ea3ad1a2d4392b9ffcec42">deduce_result_type&lt;T_arg1&gt;::type</a></div>
129 <div class="line">  operator()(T_arg1 _A_arg1) <span class="keyword">const</span>;</div>
130 <div class="line">  <span class="comment">//</span></div>
131 <div class="line">  <span class="keyword">template</span> &lt;<span class="keyword">class</span> T_arg1, <span class="keyword">class</span> T_arg2&gt;</div>
132 <div class="line">  <span class="keyword">typename</span> <a class="code" href="structsigc_1_1deduce__result__type.html#a529a6b7809ea3ad1a2d4392b9ffcec42">deduce_result_type&lt;T_arg1, T_arg2&gt;::type</a></div>
133 <div class="line">  operator()(T_arg1 _A_arg1, T_arg2 _A_arg2) <span class="keyword">const</span>;</div>
134 <div class="line">  <span class="comment">//</span></div>
135 <div class="line">  <span class="comment">// Constructs a my_adaptor object that wraps the passed functor.</span></div>
136 <div class="line">  <span class="comment">// Initializes adapts&lt;T_functor&gt;::functor_, which is invoked from operator()().</span></div>
137 <div class="line">  <span class="keyword">explicit</span> my_adaptor(<span class="keyword">const</span> T_functor&amp; _A_functor)</div>
138 <div class="line">    : <a class="code" href="namespacesigc.html">sigc</a>::<a class="code" href="structsigc_1_1adapts.html#a947b69ccbdcabd4ef4163dcab96096f8">adapts</a>&lt;T_functor&gt;(_A_functor) {}</div>
139 <div class="line">};</div>
140 <div class="line">} <span class="comment">// end namespace my_ns</span></div>
141 <div class="line"><span class="comment">//</span></div>
142 <div class="line"><span class="comment">// Specialization of sigc::visitor for my_adaptor.</span></div>
143 <div class="line"><span class="keyword">namespace </span><a class="code" href="namespacesigc.html">sigc</a></div>
144 <div class="line">{</div>
145 <div class="line"><span class="keyword">template</span> &lt;<span class="keyword">class</span> T_functor&gt;</div>
146 <div class="line"><span class="keyword">struct </span>visitor&lt;my_ns::my_adaptor&lt;T_functor&gt; &gt;</div>
147 <div class="line">{</div>
148 <div class="line">  <span class="keyword">template</span> &lt;<span class="keyword">class</span> T_action&gt;</div>
149 <div class="line">  <span class="keyword">static</span> <span class="keywordtype">void</span> do_visit_each(<span class="keyword">const</span> T_action&amp; _A_action,</div>
150 <div class="line">                            <span class="keyword">const</span> my_ns::my_adaptor&lt;T_functor&gt;&amp; _A_target)</div>
151 <div class="line">  {</div>
152 <div class="line">    <a class="code" href="group__sigcfunctors.html#ga64cb7832acc1e58efb5ffe0b4f5e9404">sigc::visit_each</a>(_A_action, _A_target.functor_);</div>
153 <div class="line">  }</div>
154 <div class="line">};</div>
155 <div class="line">} <span class="comment">// end namespace sigc</span></div>
156 <div class="ttc" id="agroup__sigcfunctors_html_ga64cb7832acc1e58efb5ffe0b4f5e9404"><div class="ttname"><a href="group__sigcfunctors.html#ga64cb7832acc1e58efb5ffe0b4f5e9404">sigc::visit_each</a></div><div class="ttdeci">void visit_each(const T_action &amp;_A_action, const T_functor &amp;_A_functor)</div><div class="ttdoc">This function performs a functor on each of the targets of a functor.</div><div class="ttdef"><b>Definition:</b> visit_each.h:169</div></div>
157 <div class="ttc" id="anamespacesigc_html"><div class="ttname"><a href="namespacesigc.html">sigc</a></div><div class="ttdoc">The libsigc++ namespace.</div><div class="ttdef"><b>Definition:</b> limit_reference.h:12</div></div>
158 <div class="ttc" id="anamespacesigc_html_ab7791439fb79592300826fe076a8e3d1"><div class="ttname"><a href="namespacesigc.html#ab7791439fb79592300826fe076a8e3d1">sigc::deduce_result_t</a></div><div class="ttdeci">typename deduce_result_type&lt; T_functor, T_args... &gt;::type deduce_result_t</div><div class="ttdef"><b>Definition:</b> deduce_result_type.h:68</div></div>
159 <div class="ttc" id="astructsigc_1_1adapts_html"><div class="ttname"><a href="structsigc_1_1adapts.html">sigc::adapts</a></div><div class="ttdoc">Base type for adaptors.</div><div class="ttdef"><b>Definition:</b> adaptor_trait.h:387</div></div>
160 <div class="ttc" id="astructsigc_1_1adapts_html_a914e75556dae1fdcf0162c4c99aca79d"><div class="ttname"><a href="structsigc_1_1adapts.html#a914e75556dae1fdcf0162c4c99aca79d">sigc::adapts::result_type</a></div><div class="ttdeci">adaptor_trait&lt; T_functor &gt;::result_type result_type</div><div class="ttdef"><b>Definition:</b> adaptor_trait.h:388</div></div>
161 <div class="ttc" id="astructsigc_1_1adapts_html_a947b69ccbdcabd4ef4163dcab96096f8"><div class="ttname"><a href="structsigc_1_1adapts.html#a947b69ccbdcabd4ef4163dcab96096f8">sigc::adapts::adapts</a></div><div class="ttdeci">adapts(const T_functor &amp;_A_functor)</div><div class="ttdoc">Constructs an adaptor that wraps the passed functor.</div><div class="ttdef"><b>Definition:</b> adaptor_trait.h:394</div></div>
162 <div class="ttc" id="astructsigc_1_1deduce__result__type_html_a529a6b7809ea3ad1a2d4392b9ffcec42"><div class="ttname"><a href="structsigc_1_1deduce__result__type.html#a529a6b7809ea3ad1a2d4392b9ffcec42">sigc::deduce_result_type::type</a></div><div class="ttdeci">decltype(test&lt; T_functor &gt;()) type</div><div class="ttdef"><b>Definition:</b> deduce_result_type.h:64</div></div>
163 <div class="ttc" id="astructsigc_1_1functor__trait_html_af1324bf0d3cec3d1f2e39e932b228d6d"><div class="ttname"><a href="structsigc_1_1functor__trait.html#af1324bf0d3cec3d1f2e39e932b228d6d">sigc::functor_trait::result_type</a></div><div class="ttdeci">void result_type</div><div class="ttdef"><b>Definition:</b> functor_trait.h:135</div></div>
164 </div><!-- fragment --></dd></dl>
165 <p>If you implement your own adaptor, you must also provide your specialization of sigc::visitor&lt;&gt;::do_visit_each&lt;&gt;() that will forward the call to the functor(s) your adapter is wrapping. Otherwise, pointers stored within the functor won't be invalidated when a <a class="el" href="structsigc_1_1trackable.html" title="Base class for objects with auto-disconnection.">sigc::trackable</a> object is destroyed and you can end up executing callbacks on destroyed objects.</p>
166 <p>Your specialization of sigc::visitor&lt;&gt; must be in namespace sigc. </p>
167 </div><h2 class="groupheader">Member Typedef Documentation</h2>
168 <a id="a5c3f3b614455552f4cd5d88b1f330248"></a>
169 <h2 class="memtitle"><span class="permalink"><a href="#a5c3f3b614455552f4cd5d88b1f330248">&#9670;&#160;</a></span>adaptor_type</h2>
170
171 <div class="memitem">
172 <div class="memproto">
173 <div class="memtemplate">
174 template &lt;class T_functor &gt; </div>
175       <table class="memname">
176         <tr>
177           <td class="memname">typedef <a class="el" href="structsigc_1_1adaptor__trait.html">adaptor_trait</a>&lt;T_functor&gt;::<a class="el" href="structsigc_1_1adapts.html#a5c3f3b614455552f4cd5d88b1f330248">adaptor_type</a> <a class="el" href="structsigc_1_1adapts.html">sigc::adapts</a>&lt; T_functor &gt;::<a class="el" href="structsigc_1_1adapts.html#a5c3f3b614455552f4cd5d88b1f330248">adaptor_type</a></td>
178         </tr>
179       </table>
180 </div><div class="memdoc">
181
182 </div>
183 </div>
184 <a id="a914e75556dae1fdcf0162c4c99aca79d"></a>
185 <h2 class="memtitle"><span class="permalink"><a href="#a914e75556dae1fdcf0162c4c99aca79d">&#9670;&#160;</a></span>result_type</h2>
186
187 <div class="memitem">
188 <div class="memproto">
189 <div class="memtemplate">
190 template &lt;class T_functor &gt; </div>
191       <table class="memname">
192         <tr>
193           <td class="memname">typedef <a class="el" href="structsigc_1_1adaptor__trait.html">adaptor_trait</a>&lt;T_functor&gt;::<a class="el" href="structsigc_1_1adapts.html#a914e75556dae1fdcf0162c4c99aca79d">result_type</a> <a class="el" href="structsigc_1_1adapts.html">sigc::adapts</a>&lt; T_functor &gt;::<a class="el" href="structsigc_1_1adapts.html#a914e75556dae1fdcf0162c4c99aca79d">result_type</a></td>
194         </tr>
195       </table>
196 </div><div class="memdoc">
197
198 </div>
199 </div>
200 <h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
201 <a id="a947b69ccbdcabd4ef4163dcab96096f8"></a>
202 <h2 class="memtitle"><span class="permalink"><a href="#a947b69ccbdcabd4ef4163dcab96096f8">&#9670;&#160;</a></span>adapts()</h2>
203
204 <div class="memitem">
205 <div class="memproto">
206 <div class="memtemplate">
207 template &lt;class T_functor &gt; </div>
208 <table class="mlabels">
209   <tr>
210   <td class="mlabels-left">
211       <table class="memname">
212         <tr>
213           <td class="memname"><a class="el" href="structsigc_1_1adapts.html">sigc::adapts</a>&lt; T_functor &gt;::<a class="el" href="structsigc_1_1adapts.html">adapts</a> </td>
214           <td>(</td>
215           <td class="paramtype">const T_functor &amp;&#160;</td>
216           <td class="paramname"><em>_A_functor</em></td><td>)</td>
217           <td></td>
218         </tr>
219       </table>
220   </td>
221   <td class="mlabels-right">
222 <span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span>  </td>
223   </tr>
224 </table>
225 </div><div class="memdoc">
226
227 <p>Constructs an adaptor that wraps the passed functor. </p>
228 <dl class="params"><dt>Parameters</dt><dd>
229   <table class="params">
230     <tr><td class="paramname">_A_functor</td><td>Functor to invoke from operator()(). </td></tr>
231   </table>
232   </dd>
233 </dl>
234
235 </div>
236 </div>
237 <h2 class="groupheader">Member Data Documentation</h2>
238 <a id="a2f4b37eb160708baf17de57f2abce7a7"></a>
239 <h2 class="memtitle"><span class="permalink"><a href="#a2f4b37eb160708baf17de57f2abce7a7">&#9670;&#160;</a></span>functor_</h2>
240
241 <div class="memitem">
242 <div class="memproto">
243 <div class="memtemplate">
244 template &lt;class T_functor &gt; </div>
245 <table class="mlabels">
246   <tr>
247   <td class="mlabels-left">
248       <table class="memname">
249         <tr>
250           <td class="memname"><a class="el" href="structsigc_1_1adapts.html#a5c3f3b614455552f4cd5d88b1f330248">adaptor_type</a> <a class="el" href="structsigc_1_1adapts.html">sigc::adapts</a>&lt; T_functor &gt;::functor_</td>
251         </tr>
252       </table>
253   </td>
254   <td class="mlabels-right">
255 <span class="mlabels"><span class="mlabel">mutable</span></span>  </td>
256   </tr>
257 </table>
258 </div><div class="memdoc">
259
260 <p>Adaptor that is invoked from operator()(). </p>
261
262 </div>
263 </div>
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