untracked/docs/reference/html/group__sigcfunctors.html

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  22    <div id="projectname">libsigc++
  23    &#160;<span id="projectnumber">2.10.8</span>
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  49 <div class="title">Functors</div>  </div>
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  52
  53 <p>Functors are copyable types that define operator()().
  54 <a href="#details">More...</a></p>
  55 <table class="memberdecls">
  56 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="groups"></a>
  57 Modules</h2></td></tr>
  58 <tr class="memitem:group__slot"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__slot.html">Slots</a></td></tr>
  59 <tr class="memdesc:group__slot"><td class="mdescLeft">&#160;</td><td class="mdescRight">Slots are type-safe representations of callback methods and functions. <br /></td></tr>
  60 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  61 <tr class="memitem:group__mem__fun"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__mem__fun.html">mem_fun()</a></td></tr>
  62 <tr class="memdesc:group__mem__fun"><td class="mdescLeft">&#160;</td><td class="mdescRight"><a class="el" href="group__mem__fun.html#gadf6b6d22c503b439019f0a2e77352419" title="Creates a functor of type sigc::mem_functor0 which wraps a method.">mem_fun()</a> Creates a functor from a pointer to a method. <br /></td></tr>
  63 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  64 <tr class="memitem:group__ptr__fun"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__ptr__fun.html">ptr_fun()</a></td></tr>
  65 <tr class="memdesc:group__ptr__fun"><td class="mdescLeft">&#160;</td><td class="mdescRight"><a class="el" href="group__ptr__fun.html#ga9c80de72f656fb05e81fda622dddc863" title="Creates a functor of type sigc::pointer_functor0 which wraps an existing non-member function.">ptr_fun()</a> is used to convert a pointer to a function to a functor. <br /></td></tr>
  66 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  67 </table><table class="memberdecls">
  68 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
  69 Classes</h2></td></tr>
  70 <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1can__deduce__result__type__with__decltype.html">sigc::can_deduce_result_type_with_decltype&lt; T_functor &gt;</a></td></tr>
  71 <tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Helper class, to determine if decltype() can deduce the result type of a functor.  <a href="classsigc_1_1can__deduce__result__type__with__decltype.html#details">More...</a><br /></td></tr>
  72 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  73 <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1functor__base.html">sigc::functor_base</a></td></tr>
  74 <tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">A hint to the compiler.  <a href="structsigc_1_1functor__base.html#details">More...</a><br /></td></tr>
  75 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  76 <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1functor__trait.html">sigc::functor_trait&lt; T_functor, I_derives_functor_base, I_can_use_decltype &gt;</a></td></tr>
  77 <tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Trait that specifies the return type of any type.  <a href="structsigc_1_1functor__trait.html#details">More...</a><br /></td></tr>
  78 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  79 <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1visitor.html">sigc::visitor&lt; T_functor &gt;</a></td></tr>
  80 <tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight"><a class="el" href="structsigc_1_1visitor.html#a9fe5d6be845e622a99a0db5d3621d4b3">sigc::visitor&lt;T_functor&gt;::do_visit_each()</a> performs a functor on each of the targets of a functor.  <a href="structsigc_1_1visitor.html#details">More...</a><br /></td></tr>
  81 <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  82 </table><table class="memberdecls">
  83 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
  84 Macros</h2></td></tr>
  85 <tr class="memitem:ga7a6f5575dc0b0ea896889c782721f6be"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__sigcfunctors.html#ga7a6f5575dc0b0ea896889c782721f6be">SIGC_FUNCTOR_TRAIT</a>(T_functor,  T_return)</td></tr>
  86 <tr class="memdesc:ga7a6f5575dc0b0ea896889c782721f6be"><td class="mdescLeft">&#160;</td><td class="mdescRight">Helper macro, if you want to mix user-defined and third party functors with libsigc++.  <a href="group__sigcfunctors.html#ga7a6f5575dc0b0ea896889c782721f6be">More...</a><br /></td></tr>
  87 <tr class="separator:ga7a6f5575dc0b0ea896889c782721f6be"><td class="memSeparator" colspan="2">&#160;</td></tr>
  88 <tr class="memitem:gadf1ba3cacb09cc5c3c3e399836ec6e50"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__sigcfunctors.html#gadf1ba3cacb09cc5c3c3e399836ec6e50">SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE</a></td></tr>
  89 <tr class="memdesc:gadf1ba3cacb09cc5c3c3e399836ec6e50"><td class="mdescLeft">&#160;</td><td class="mdescRight">Helper macro, if you want to mix user-defined and third party functors with libsigc++.  <a href="group__sigcfunctors.html#gadf1ba3cacb09cc5c3c3e399836ec6e50">More...</a><br /></td></tr>
  90 <tr class="separator:gadf1ba3cacb09cc5c3c3e399836ec6e50"><td class="memSeparator" colspan="2">&#160;</td></tr>
  91 <tr class="memitem:ga93b6ee8815d90adccfdceed72bcda577"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__sigcfunctors.html#ga93b6ee8815d90adccfdceed72bcda577">SIGC_FUNCTORS_HAVE_RESULT_TYPE</a></td></tr>
  92 <tr class="memdesc:ga93b6ee8815d90adccfdceed72bcda577"><td class="mdescLeft">&#160;</td><td class="mdescRight">Helper macro, if you want to mix user-defined and third party functors with libsigc++.  <a href="group__sigcfunctors.html#ga93b6ee8815d90adccfdceed72bcda577">More...</a><br /></td></tr>
  93 <tr class="separator:ga93b6ee8815d90adccfdceed72bcda577"><td class="memSeparator" colspan="2">&#160;</td></tr>
  94 </table><table class="memberdecls">
  95 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
  96 Functions</h2></td></tr>
  97 <tr class="memitem:ga64cb7832acc1e58efb5ffe0b4f5e9404"><td class="memTemplParams" colspan="2">template&lt;class T_action , class T_functor &gt; </td></tr>
  98 <tr class="memitem:ga64cb7832acc1e58efb5ffe0b4f5e9404"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="group__sigcfunctors.html#ga64cb7832acc1e58efb5ffe0b4f5e9404">sigc::visit_each</a> (const T_action &amp; _A_action, const T_functor &amp; _A_functor)</td></tr>
  99 <tr class="memdesc:ga64cb7832acc1e58efb5ffe0b4f5e9404"><td class="mdescLeft">&#160;</td><td class="mdescRight">This function performs a functor on each of the targets of a functor.  <a href="group__sigcfunctors.html#ga64cb7832acc1e58efb5ffe0b4f5e9404">More...</a><br /></td></tr>
 100 <tr class="separator:ga64cb7832acc1e58efb5ffe0b4f5e9404"><td class="memSeparator" colspan="2">&#160;</td></tr>
 101 <tr class="memitem:gada222d975b87d64cfa7a7f29244ae587"><td class="memTemplParams" colspan="2">template&lt;class T_type , class T_action , class T_functor &gt; </td></tr>
 102 <tr class="memitem:gada222d975b87d64cfa7a7f29244ae587"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="group__sigcfunctors.html#gada222d975b87d64cfa7a7f29244ae587">sigc::visit_each_type</a> (const T_action &amp; _A_action, const T_functor &amp; _A_functor)</td></tr>
 103 <tr class="memdesc:gada222d975b87d64cfa7a7f29244ae587"><td class="mdescLeft">&#160;</td><td class="mdescRight">This function performs a functor on each of the targets of a functor limited to a restricted type.  <a href="group__sigcfunctors.html#gada222d975b87d64cfa7a7f29244ae587">More...</a><br /></td></tr>
 104 <tr class="separator:gada222d975b87d64cfa7a7f29244ae587"><td class="memSeparator" colspan="2">&#160;</td></tr>
 105 </table>
 106 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
 107 <p>Functors are copyable types that define operator()(). </p>
 108 <p>Types that define operator()() overloads with different return types are referred to as multi-type functors. Multi-type functors are only partially supported in libsigc++.</p>
 109 <p>Closures are functors that store all information needed to invoke a callback from operator()().</p>
 110 <p>Adaptors are functors that alter the signature of a functor's operator()().</p>
 111 <p>libsigc++ defines numerous functors, closures and adaptors. Since libsigc++ is a callback library, most functors are also closures. The documentation doesn't distinguish between functors and closures.</p>
 112 <p>The basic functor types libsigc++ provides are created with <a class="el" href="group__ptr__fun.html#ga9c80de72f656fb05e81fda622dddc863" title="Creates a functor of type sigc::pointer_functor0 which wraps an existing non-member function.">ptr_fun()</a> and <a class="el" href="group__mem__fun.html#gadf6b6d22c503b439019f0a2e77352419" title="Creates a functor of type sigc::mem_functor0 which wraps a method.">mem_fun()</a> and can be converted into slots implicitly. The set of adaptors that ships with libsigc++ is documented in the <a class="el" href="group__adaptors.html">Adaptors</a> module.</p>
 113 <p>If you want to mix user-defined and third party functors with libsigc++, and you want them to be implicitly convertible into slots, libsigc++ must know the result type of your functors. There are different ways to achieve that.</p>
 114 <ul>
 115 <li>Derive your functors from <a class="el" href="structsigc_1_1functor__base.html" title="A hint to the compiler.">sigc::functor_base</a> and place <code>typedef T_return result_type;</code> in the class definition.</li>
 116 <li>Use the macro <a class="el" href="group__sigcfunctors.html#ga7a6f5575dc0b0ea896889c782721f6be" title="Helper macro, if you want to mix user-defined and third party functors with libsigc++.">SIGC_FUNCTOR_TRAIT(T_functor,T_return)</a> in namespace sigc. Multi-type functors are only partly supported.</li>
 117 <li>For functors not derived from <a class="el" href="structsigc_1_1functor__base.html" title="A hint to the compiler.">sigc::functor_base</a>, and not specified with <a class="el" href="group__sigcfunctors.html#ga7a6f5575dc0b0ea896889c782721f6be" title="Helper macro, if you want to mix user-defined and third party functors with libsigc++.">SIGC_FUNCTOR_TRAIT()</a>, libsigc++ tries to deduce the result type with the C++11 decltype() specifier. That attempt usually succeeds if the functor has a single operator()(), but it fails if operator()() is overloaded.</li>
 118 <li>Use the macro <a class="el" href="group__sigcfunctors.html#ga93b6ee8815d90adccfdceed72bcda577" title="Helper macro, if you want to mix user-defined and third party functors with libsigc++.">SIGC_FUNCTORS_HAVE_RESULT_TYPE</a>, if you want libsigc++ to assume that result_type is defined in all user-defined or third party functors, whose result type can't be deduced in any other way.</li>
 119 </ul>
 120 <p>If all these ways to deduce the result type fail, void is assumed.</p>
 121 <p>With libsigc++ versions before 2.6, the macro <a class="el" href="group__sigcfunctors.html#gadf1ba3cacb09cc5c3c3e399836ec6e50" title="Helper macro, if you want to mix user-defined and third party functors with libsigc++.">SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE</a> activated the test with decltype(). That macro is now unneccesary and deprecated. </p>
 122 <h2 class="groupheader">Macro Definition Documentation</h2>
 123 <a id="ga7a6f5575dc0b0ea896889c782721f6be"></a>
 124 <h2 class="memtitle"><span class="permalink"><a href="#ga7a6f5575dc0b0ea896889c782721f6be">&#9670;&#160;</a></span>SIGC_FUNCTOR_TRAIT</h2>
 125
 126 <div class="memitem">
 127 <div class="memproto">
 128       <table class="memname">
 129         <tr>
 130           <td class="memname">#define SIGC_FUNCTOR_TRAIT</td>
 131           <td>(</td>
 132           <td class="paramtype">&#160;</td>
 133           <td class="paramname">T_functor, </td>
 134         </tr>
 135         <tr>
 136           <td class="paramkey"></td>
 137           <td></td>
 138           <td class="paramtype">&#160;</td>
 139           <td class="paramname">T_return&#160;</td>
 140         </tr>
 141         <tr>
 142           <td></td>
 143           <td>)</td>
 144           <td></td><td></td>
 145         </tr>
 146       </table>
 147 </div><div class="memdoc">
 148
 149 <p>Helper macro, if you want to mix user-defined and third party functors with libsigc++. </p>
 150 <p>If you want to mix functors not derived from <a class="el" href="structsigc_1_1functor__base.html" title="A hint to the compiler.">sigc::functor_base</a> with libsigc++, and these functors don't define <code>result_type</code>, use this macro inside namespace sigc to expose the return type of the functors like so: </p><div class="fragment"><div class="line"><span class="keyword">namespace </span><a class="code" href="namespacesigc.html">sigc</a> {</div>
 151 <div class="line">  <a class="code" href="group__sigcfunctors.html#ga7a6f5575dc0b0ea896889c782721f6be">SIGC_FUNCTOR_TRAIT</a>(first_functor_type, return_type_of_first_functor_type)</div>
 152 <div class="line">  <a class="code" href="group__sigcfunctors.html#ga7a6f5575dc0b0ea896889c782721f6be">SIGC_FUNCTOR_TRAIT</a>(second_functor_type, return_type_of_second_functor_type)</div>
 153 <div class="line">  ...</div>
 154 <div class="line">}</div>
 155 <div class="ttc" id="agroup__sigcfunctors_html_ga7a6f5575dc0b0ea896889c782721f6be"><div class="ttname"><a href="group__sigcfunctors.html#ga7a6f5575dc0b0ea896889c782721f6be">SIGC_FUNCTOR_TRAIT</a></div><div class="ttdeci">#define SIGC_FUNCTOR_TRAIT(T_functor, T_return)</div><div class="ttdoc">Helper macro, if you want to mix user-defined and third party functors with libsigc++.</div><div class="ttdef"><b>Definition:</b> functor_trait.h:188</div></div>
 156 <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>
 157 </div><!-- fragment -->
 158 </div>
 159 </div>
 160 <a id="gadf1ba3cacb09cc5c3c3e399836ec6e50"></a>
 161 <h2 class="memtitle"><span class="permalink"><a href="#gadf1ba3cacb09cc5c3c3e399836ec6e50">&#9670;&#160;</a></span>SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE</h2>
 162
 163 <div class="memitem">
 164 <div class="memproto">
 165       <table class="memname">
 166         <tr>
 167           <td class="memname">#define SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE</td>
 168         </tr>
 169       </table>
 170 </div><div class="memdoc">
 171
 172 <p>Helper macro, if you want to mix user-defined and third party functors with libsigc++. </p>
 173 <p>If you want to mix functors not derived from <a class="el" href="structsigc_1_1functor__base.html" title="A hint to the compiler.">sigc::functor_base</a> with libsigc++, and your compiler can deduce the result type of the functor with the C++11 keyword <code>decltype</code>, use this macro inside namespace sigc like so: </p><div class="fragment"><div class="line"><span class="keyword">namespace </span><a class="code" href="namespacesigc.html">sigc</a> {</div>
 174 <div class="line">  <a class="code" href="group__sigcfunctors.html#gadf1ba3cacb09cc5c3c3e399836ec6e50">SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE</a></div>
 175 <div class="line">}</div>
 176 <div class="ttc" id="agroup__sigcfunctors_html_gadf1ba3cacb09cc5c3c3e399836ec6e50"><div class="ttname"><a href="group__sigcfunctors.html#gadf1ba3cacb09cc5c3c3e399836ec6e50">SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE</a></div><div class="ttdeci">#define SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE</div><div class="ttdoc">Helper macro, if you want to mix user-defined and third party functors with libsigc++.</div><div class="ttdef"><b>Definition:</b> functor_trait.h:223</div></div>
 177 </div><!-- fragment --><p>Functors with overloaded operator()() are not supported.</p>
 178 <dl class="since_2_2_11"><dt><b><a class="el" href="since_2_2_11.html#_since_2_2_11000001">Since libsigc++ 2.2.11:</a></b></dt><dd></dd></dl>
 179 <dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000065">Deprecated:</a></b></dt><dd>This macro does nothing. The test it activated in libsigc++ versions before 2.6, is now unconditionally activated.</dd></dl>
 180
 181 </div>
 182 </div>
 183 <a id="ga93b6ee8815d90adccfdceed72bcda577"></a>
 184 <h2 class="memtitle"><span class="permalink"><a href="#ga93b6ee8815d90adccfdceed72bcda577">&#9670;&#160;</a></span>SIGC_FUNCTORS_HAVE_RESULT_TYPE</h2>
 185
 186 <div class="memitem">
 187 <div class="memproto">
 188       <table class="memname">
 189         <tr>
 190           <td class="memname">#define SIGC_FUNCTORS_HAVE_RESULT_TYPE</td>
 191         </tr>
 192       </table>
 193 </div><div class="memdoc">
 194
 195 <p>Helper macro, if you want to mix user-defined and third party functors with libsigc++. </p>
 196 <p>If you want to mix functors not derived from <a class="el" href="structsigc_1_1functor__base.html" title="A hint to the compiler.">sigc::functor_base</a> with libsigc++, and these functors define <code>result_type</code>, use this macro inside namespace sigc like so: </p><div class="fragment"><div class="line"><span class="keyword">namespace </span><a class="code" href="namespacesigc.html">sigc</a> { <a class="code" href="group__sigcfunctors.html#ga93b6ee8815d90adccfdceed72bcda577">SIGC_FUNCTORS_HAVE_RESULT_TYPE</a> }</div>
 197 <div class="ttc" id="agroup__sigcfunctors_html_ga93b6ee8815d90adccfdceed72bcda577"><div class="ttname"><a href="group__sigcfunctors.html#ga93b6ee8815d90adccfdceed72bcda577">SIGC_FUNCTORS_HAVE_RESULT_TYPE</a></div><div class="ttdeci">#define SIGC_FUNCTORS_HAVE_RESULT_TYPE</div><div class="ttdoc">Helper macro, if you want to mix user-defined and third party functors with libsigc++.</div><div class="ttdef"><b>Definition:</b> functor_trait.h:165</div></div>
 198 </div><!-- fragment -->
 199 </div>
 200 </div>
 201 <h2 class="groupheader">Function Documentation</h2>
 202 <a id="ga64cb7832acc1e58efb5ffe0b4f5e9404"></a>
 203 <h2 class="memtitle"><span class="permalink"><a href="#ga64cb7832acc1e58efb5ffe0b4f5e9404">&#9670;&#160;</a></span>visit_each()</h2>
 204
 205 <div class="memitem">
 206 <div class="memproto">
 207 <div class="memtemplate">
 208 template &lt;class T_action , class T_functor &gt; </div>
 209       <table class="memname">
 210         <tr>
 211           <td class="memname">void sigc::visit_each </td>
 212           <td>(</td>
 213           <td class="paramtype">const T_action &amp;&#160;</td>
 214           <td class="paramname"><em>_A_action</em>, </td>
 215         </tr>
 216         <tr>
 217           <td class="paramkey"></td>
 218           <td></td>
 219           <td class="paramtype">const T_functor &amp;&#160;</td>
 220           <td class="paramname"><em>_A_functor</em>&#160;</td>
 221         </tr>
 222         <tr>
 223           <td></td>
 224           <td>)</td>
 225           <td></td><td></td>
 226         </tr>
 227       </table>
 228 </div><div class="memdoc">
 229
 230 <p>This function performs a functor on each of the targets of a functor. </p>
 231
 232 </div>
 233 </div>
 234 <a id="gada222d975b87d64cfa7a7f29244ae587"></a>
 235 <h2 class="memtitle"><span class="permalink"><a href="#gada222d975b87d64cfa7a7f29244ae587">&#9670;&#160;</a></span>visit_each_type()</h2>
 236
 237 <div class="memitem">
 238 <div class="memproto">
 239 <div class="memtemplate">
 240 template &lt;class T_type , class T_action , class T_functor &gt; </div>
 241       <table class="memname">
 242         <tr>
 243           <td class="memname">void sigc::visit_each_type </td>
 244           <td>(</td>
 245           <td class="paramtype">const T_action &amp;&#160;</td>
 246           <td class="paramname"><em>_A_action</em>, </td>
 247         </tr>
 248         <tr>
 249           <td class="paramkey"></td>
 250           <td></td>
 251           <td class="paramtype">const T_functor &amp;&#160;</td>
 252           <td class="paramname"><em>_A_functor</em>&#160;</td>
 253         </tr>
 254         <tr>
 255           <td></td>
 256           <td>)</td>
 257           <td></td><td></td>
 258         </tr>
 259       </table>
 260 </div><div class="memdoc">
 261
 262 <p>This function performs a functor on each of the targets of a functor limited to a restricted type. </p>
 263
 264 </div>
 265 </div>
 266 </div><!-- contents -->
 267 <!-- start footer part -->
 268 <hr class="footer"/><address class="footer"><small>
 269 Generated on Fri Feb 11 2022 15:40:57 for libsigc++ by&#160;<a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.1
 270 </small></address>
 271 </body>
 272 </html>