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<a href="selection_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#ifndef __utl_meta_selection_h__</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#define __utl_meta_selection_h__</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="impl_8h.html">utl/core/impl.h</a>&gt;</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="integral_8h.html">utl/meta/integral.h</a>&gt;</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceutl.html">utl</a> {</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="keyword">namespace </span>meta{</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;   <span class="keyword">namespace </span>detail {</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;      <span class="keyword">template</span> &lt;<span class="keywordtype">bool</span> If, <span class="keyword">typename</span>...&gt;</div><div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="structutl_1_1meta_1_1detail_1_1if__c__.html">   44</a></span>&#160;      <span class="keyword">struct </span><a class="code" href="structutl_1_1meta_1_1detail_1_1if__c__.html">if_c_</a> {</div><div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="group__type.html#gaefeff9de7bff8811e49692343ce6187e">   45</a></span>&#160;         <span class="keyword">using</span> <a class="code" href="structutl_1_1meta_1_1nil__.html">type</a> = <a class="code" href="structutl_1_1meta_1_1nil__.html">nil_</a>;   </div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;      };</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Then&gt;</div><div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_01_4.html">   48</a></span>&#160;      <span class="keyword">struct </span><a class="code" href="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_01_4.html">if_c_&lt;true, Then&gt;</a> {</div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="group__type.html#gaa7f24607990e92d8263246fc5f7003b7">   49</a></span>&#160;         <span class="keyword">using</span> <a class="code" href="group__type.html#gaa7f24607990e92d8263246fc5f7003b7">type</a> = Then;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;      };</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Then, <span class="keyword">typename</span> Else&gt;</div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_00_01_else_01_4.html">   52</a></span>&#160;      <span class="keyword">struct </span><a class="code" href="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_00_01_else_01_4.html">if_c_&lt;true, Then, Else&gt;</a> {</div><div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="group__type.html#ga15100ac40785819517c5defacb19915c">   53</a></span>&#160;         <span class="keyword">using</span> <a class="code" href="group__type.html#ga15100ac40785819517c5defacb19915c">type</a> = Then;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;      };</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Then, <span class="keyword">typename</span> Else&gt;</div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="structutl_1_1meta_1_1detail_1_1if__c___3_01false_00_01_then_00_01_else_01_4.html">   56</a></span>&#160;      <span class="keyword">struct </span><a class="code" href="structutl_1_1meta_1_1detail_1_1if__c___3_01false_00_01_then_00_01_else_01_4.html">if_c_&lt;false, Then, Else&gt;</a> {</div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="group__type.html#ga2fbed149992c081ac85eefaf63a388ca">   57</a></span>&#160;         <span class="keyword">using</span> <a class="code" href="group__type.html#ga2fbed149992c081ac85eefaf63a388ca">type</a> = Else;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;      };</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;   }</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;   <span class="keyword">template</span> &lt;<span class="keywordtype">bool</span> B, <span class="keyword">typename</span>... Args&gt;</div><div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="group__type.html#gaa3812817ce749832da73fdf5d2a85380">   62</a></span>&#160;   <span class="keyword">using</span> <a class="code" href="group__type.html#gaa3812817ce749832da73fdf5d2a85380">if_c</a> = <a class="code" href="namespaceutl_1_1meta.html#aa5a37adba244ff4286f994111c4c02ea">eval</a>&lt;<a class="code" href="structutl_1_1meta_1_1detail_1_1if__c__.html">detail::if_c_</a>&lt;B, Args...&gt;&gt;;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;   <span class="keyword">template</span> &lt;<span class="keyword">typename</span> If, <span class="keyword">typename</span>... Args&gt;</div><div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="group__type.html#ga39cc4e727a8faa5ea176f543e62c05c0">   66</a></span>&#160;   <span class="keyword">using</span> <a class="code" href="group__type.html#ga39cc4e727a8faa5ea176f543e62c05c0">if_</a> = <a class="code" href="group__type.html#gaa3812817ce749832da73fdf5d2a85380">if_c</a>&lt;If::type::value, Args...&gt;;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="group__type.html#gaf7089523d21cd405c76985643f31092a">   76</a></span>&#160;   <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T1, <span class="keyword">typename</span> ...&gt; <span class="keyword">using</span> <a class="code" href="group__type.html#gaf7089523d21cd405c76985643f31092a">first_of</a> = T1;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div><div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="group__type.html#ga422dd1b0895f0074ad9932d68d9edbc5">   79</a></span>&#160;   <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2, <span class="keyword">typename</span> ...&gt; <span class="keyword">using</span> <a class="code" href="group__type.html#ga422dd1b0895f0074ad9932d68d9edbc5">second_of</a> = T2;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;}}</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* __utl_meta_selection_h__ */</span><span class="preprocessor"></span></div><div class="ttc" id="group__type_html_gaf7089523d21cd405c76985643f31092a"><div class="ttname"><a href="group__type.html#gaf7089523d21cd405c76985643f31092a">utl::meta::first_of</a></div><div class="ttdeci">T1 first_of</div><div class="ttdoc">Select the first type of a type sequence. </div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00076">selection.h:76</a></div></div>
<div class="ttc" id="group__type_html_gaa7f24607990e92d8263246fc5f7003b7"><div class="ttname"><a href="group__type.html#gaa7f24607990e92d8263246fc5f7003b7">utl::meta::detail::if_c_&lt; true, Then &gt;::type</a></div><div class="ttdeci">Then type</div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00049">selection.h:49</a></div></div>
<div class="ttc" id="group__type_html_ga39cc4e727a8faa5ea176f543e62c05c0"><div class="ttname"><a href="group__type.html#ga39cc4e727a8faa5ea176f543e62c05c0">utl::meta::if_</a></div><div class="ttdeci">if_c&lt; If::type::value, Args... &gt; if_</div><div class="ttdoc">Select one type or another depending on a compile-time Boolean type. </div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00066">selection.h:66</a></div></div>
<div class="ttc" id="group__type_html_gaa3812817ce749832da73fdf5d2a85380"><div class="ttname"><a href="group__type.html#gaa3812817ce749832da73fdf5d2a85380">utl::meta::if_c</a></div><div class="ttdeci">eval&lt; detail::if_c_&lt; B, Args... &gt; &gt; if_c</div><div class="ttdoc">Select one type or another depending on a compile-time Boolean. </div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00062">selection.h:62</a></div></div>
<div class="ttc" id="group__type_html_ga422dd1b0895f0074ad9932d68d9edbc5"><div class="ttname"><a href="group__type.html#ga422dd1b0895f0074ad9932d68d9edbc5">utl::meta::second_of</a></div><div class="ttdeci">T2 second_of</div><div class="ttdoc">Select the second type of a type sequence. </div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00079">selection.h:79</a></div></div>
<div class="ttc" id="group__type_html_ga15100ac40785819517c5defacb19915c"><div class="ttname"><a href="group__type.html#ga15100ac40785819517c5defacb19915c">utl::meta::detail::if_c_&lt; true, Then, Else &gt;::type</a></div><div class="ttdeci">Then type</div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00053">selection.h:53</a></div></div>
<div class="ttc" id="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_00_01_else_01_4_html"><div class="ttname"><a href="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_00_01_else_01_4.html">utl::meta::detail::if_c_&lt; true, Then, Else &gt;</a></div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00052">selection.h:52</a></div></div>
<div class="ttc" id="structutl_1_1meta_1_1nil___html"><div class="ttname"><a href="structutl_1_1meta_1_1nil__.html">utl::meta::nil_</a></div><div class="ttdef"><b>Definition:</b> <a href="integral_8h_source.html#l00043">integral.h:43</a></div></div>
<div class="ttc" id="group__type_html_ga2fbed149992c081ac85eefaf63a388ca"><div class="ttname"><a href="group__type.html#ga2fbed149992c081ac85eefaf63a388ca">utl::meta::detail::if_c_&lt; false, Then, Else &gt;::type</a></div><div class="ttdeci">Else type</div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00057">selection.h:57</a></div></div>
<div class="ttc" id="namespaceutl_1_1meta_html_aa5a37adba244ff4286f994111c4c02ea"><div class="ttname"><a href="namespaceutl_1_1meta.html#aa5a37adba244ff4286f994111c4c02ea">utl::meta::eval</a></div><div class="ttdeci">typename Tp::type eval</div><div class="ttdoc">Type alias for Tp::type. Used to evaluate/extract return type of metafunctions. </div><div class="ttdef"><b>Definition:</b> <a href="integral_8h_source.html#l00049">integral.h:49</a></div></div>
<div class="ttc" id="namespaceutl_html"><div class="ttname"><a href="namespaceutl.html">utl</a></div><div class="ttdoc">STL&amp;#39;s core language concepts. </div><div class="ttdef"><b>Definition:</b> <a href="__1wire_8h_source.html#l00030">_1wire.h:30</a></div></div>
<div class="ttc" id="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_01_4_html"><div class="ttname"><a href="structutl_1_1meta_1_1detail_1_1if__c___3_01true_00_01_then_01_4.html">utl::meta::detail::if_c_&lt; true, Then &gt;</a></div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00048">selection.h:48</a></div></div>
<div class="ttc" id="integral_8h_html"><div class="ttname"><a href="integral_8h.html">integral.h</a></div></div>
<div class="ttc" id="structutl_1_1meta_1_1detail_1_1if__c___3_01false_00_01_then_00_01_else_01_4_html"><div class="ttname"><a href="structutl_1_1meta_1_1detail_1_1if__c___3_01false_00_01_then_00_01_else_01_4.html">utl::meta::detail::if_c_&lt; false, Then, Else &gt;</a></div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00056">selection.h:56</a></div></div>
<div class="ttc" id="structutl_1_1meta_1_1detail_1_1if__c___html"><div class="ttname"><a href="structutl_1_1meta_1_1detail_1_1if__c__.html">utl::meta::detail::if_c_</a></div><div class="ttdef"><b>Definition:</b> <a href="selection_8h_source.html#l00044">selection.h:44</a></div></div>
<div class="ttc" id="impl_8h_html"><div class="ttname"><a href="impl_8h.html">impl.h</a></div><div class="ttdoc">Implementation detail main forward header. </div></div>
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