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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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  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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  88 <table class="memberdecls">
  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>
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  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>
 264 </div><!-- contents -->
 265 <!-- start footer part -->
 266 <hr class="footer"/><address class="footer"><small>
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