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  22 <h1>Sylph/Core/Any.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* </span>
  23 <a name="l00002"></a>00002 <span class="comment"> * LibSylph Class Library</span>
  24 <a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2009 Frank "SeySayux" Erens &lt;seysayux@gmail.com&gt;</span>
  25 <a name="l00004"></a>00004 <span class="comment"> *</span>
  26 <a name="l00005"></a>00005 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
  27 <a name="l00006"></a>00006 <span class="comment"> * modify it under the terms of the LibSylph Pulbic License as published</span>
  28 <a name="l00007"></a>00007 <span class="comment"> * by the LibSylph Developers; either version 1.0 of the License, or</span>
  29 <a name="l00008"></a>00008 <span class="comment"> * (at your option) any later version.</span>
  30 <a name="l00009"></a>00009 <span class="comment"> *</span>
  31 <a name="l00010"></a>00010 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
  32 <a name="l00011"></a>00011 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
  33 <a name="l00012"></a>00012 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the LibSylph</span>
  34 <a name="l00013"></a>00013 <span class="comment"> * Public License for more details.</span>
  35 <a name="l00014"></a>00014 <span class="comment"> *</span>
  36 <a name="l00015"></a>00015 <span class="comment"> * You should have received a copy of the LibSylph Public License</span>
  37 <a name="l00016"></a>00016 <span class="comment"> * along with this Library, if not, contact the LibSylph Developers.</span>
  38 <a name="l00017"></a>00017 <span class="comment"> *</span>
  39 <a name="l00018"></a>00018 <span class="comment"> * Created on 22 maart 2009, 16:40</span>
  40 <a name="l00019"></a>00019 <span class="comment"> */</span>
  41 <a name="l00020"></a>00020
  42 <a name="l00021"></a>00021 <span class="preprocessor">#ifndef ANY_H_</span>
  43 <a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define ANY_H_</span>
  44 <a name="l00023"></a>00023 <span class="preprocessor"></span>
  45 <a name="l00024"></a>00024 <span class="preprocessor">#include "Object.h"</span>
  46 <a name="l00025"></a>00025 <span class="preprocessor">#include "Exception.h"</span>
  47 <a name="l00026"></a>00026 <span class="preprocessor">#include "Primitives.h"</span>
  48 <a name="l00027"></a>00027
  49 <a name="l00028"></a>00028 <span class="preprocessor">#include &lt;typeinfo&gt;</span>
  50 <a name="l00029"></a>00029
  51 <a name="l00030"></a><a class="code" href="namespace_sylph.html">00030</a> SYLPH_BEGIN_NAMESPACE
  52 <a name="l00031"></a>00031 SYLPH_PUBLIC
  53 <a name="l00032"></a>00032
  54 <a name="l00046"></a><a class="code" href="class_sylph_1_1_any.html">00046</a> <span class="keyword">class </span><a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a> : <span class="keyword">public</span> <span class="keyword">virtual</span> <a class="code" href="class_sylph_1_1_object.html" title="The root of all classes.">Object</a> {
  55 <a name="l00047"></a>00047     <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt; <span class="keyword">friend</span> T* <a class="code" href="namespace_sylph.html#1d4330bb87843d404b430a8b8a4b4af5" title="Cast an Any to the type it is holding.">any_cast</a>(<a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a> &amp; any);
  56 <a name="l00048"></a>00048 <span class="keyword">public</span>:
  57 <a name="l00049"></a>00049
  58 <a name="l00054"></a><a class="code" href="class_sylph_1_1_any.html#63cde8641e21cda8efe82b3752bed66f">00054</a>     <a class="code" href="class_sylph_1_1_any.html#63cde8641e21cda8efe82b3752bed66f" title="Creates a new, empty Any object.">Any</a>() : content(null) {}
  59 <a name="l00055"></a>00055     <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
  60 <a name="l00063"></a><a class="code" href="class_sylph_1_1_any.html#b03f14f5215fe956a8e76d6350024f02">00063</a>     <a class="code" href="class_sylph_1_1_any.html#b03f14f5215fe956a8e76d6350024f02" title="Creates a new Any object from an existing object.">Any</a>(<span class="keyword">const</span> T &amp; value) : content(new AnyContainer&lt;T&gt;(value)) {}
  61 <a name="l00064"></a>00064
  62 <a name="l00069"></a><a class="code" href="class_sylph_1_1_any.html#ee814145fbd7b187170205dfb8b866d8">00069</a>     <a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a>(<span class="keyword">const</span> <a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a> &amp; other) : content(other.content ?
  63 <a name="l00070"></a>00070           other.content-&gt;clone() : 0) {}
  64 <a name="l00074"></a><a class="code" href="class_sylph_1_1_any.html#f7ddbe1a5c8bd1633b055ca2094cd92e">00074</a>     <a class="code" href="class_sylph_1_1_any.html#f7ddbe1a5c8bd1633b055ca2094cd92e" title="Default destructor.">~Any</a>() { <span class="keyword">delete</span> content; }
  65 <a name="l00075"></a>00075
  66 <a name="l00081"></a><a class="code" href="class_sylph_1_1_any.html#eb843e6be33616bd4559f68957799c25">00081</a>     <span class="keywordtype">bool</span> <a class="code" href="class_sylph_1_1_any.html#eb843e6be33616bd4559f68957799c25" title="Check if this Any is pointing to something.">empty</a>() { <span class="keywordflow">return</span> !content; }
  67 <a name="l00082"></a>00082
  68 <a name="l00098"></a><a class="code" href="class_sylph_1_1_any.html#77fc0fdfa5c15a6366378f5f770e2e4d">00098</a>     <span class="keyword">const</span> std::type_info &amp; <a class="code" href="class_sylph_1_1_any.html#77fc0fdfa5c15a6366378f5f770e2e4d" title="Gets the typeinfo of the data pointed to.">type</a>()<span class="keyword"> const </span>{
  69 <a name="l00099"></a>00099         <span class="keywordflow">return</span> content ? content-&gt;type() : <span class="keyword">typeid</span>(void);
  70 <a name="l00100"></a>00100     }
  71 <a name="l00101"></a>00101
  72 <a name="l00108"></a><a class="code" href="class_sylph_1_1_any.html#85164cb8a7df065867204ca565f18675">00108</a>     <a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a> &amp; <a class="code" href="class_sylph_1_1_any.html#85164cb8a7df065867204ca565f18675" title="Assigns an other Any instance to this one.">operator=</a>(<span class="keyword">const</span> <a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a> &amp; rhs) {
  73 <a name="l00109"></a>00109         this-&gt;content = rhs.<a class="code" href="class_sylph_1_1_any.html#fb53f24e61d99c6e0da59ffc396aea2f">content</a>;
  74 <a name="l00110"></a>00110         <span class="keywordflow">return</span> *<span class="keyword">this</span>;
  75 <a name="l00111"></a>00111     }
  76 <a name="l00112"></a>00112
  77 <a name="l00121"></a>00121     <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
  78 <a name="l00122"></a><a class="code" href="class_sylph_1_1_any.html#a7cc9001e0b52ac76a89451828a9ab4d">00122</a>     <a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a> &amp; <a class="code" href="class_sylph_1_1_any.html#a7cc9001e0b52ac76a89451828a9ab4d" title="Assigns a new value to this Any.">operator=</a>(T &amp; value) {
  79 <a name="l00123"></a>00123         <span class="keyword">delete</span> this-&gt;content;
  80 <a name="l00124"></a>00124         this-&gt;content = <span class="keyword">new</span> AnyContainer&lt;T&gt;(value);
  81 <a name="l00125"></a>00125         <span class="keywordflow">return</span> *<span class="keyword">this</span>;
  82 <a name="l00126"></a>00126     }
  83 <a name="l00127"></a>00127 <span class="keyword">private</span>:
  84 <a name="l00128"></a>00128
  85 <a name="l00129"></a>00129     <span class="keyword">class </span>AnyContainerBase {
  86 <a name="l00130"></a>00130     <span class="keyword">public</span>:
  87 <a name="l00131"></a>00131
  88 <a name="l00132"></a>00132         <span class="keyword">virtual</span> ~AnyContainerBase() {
  89 <a name="l00133"></a>00133         }
  90 <a name="l00134"></a>00134         <span class="keyword">virtual</span> <span class="keyword">const</span> std::type_info &amp; type() <span class="keyword">const</span> = 0;
  91 <a name="l00135"></a>00135         <span class="keyword">virtual</span> AnyContainerBase * clone() <span class="keyword">const</span> = 0;
  92 <a name="l00136"></a>00136     };
  93 <a name="l00137"></a>00137
  94 <a name="l00138"></a>00138     <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;
  95 <a name="l00139"></a>00139     <span class="keyword">class </span>AnyContainer : <span class="keyword">public</span> AnyContainerBase {
  96 <a name="l00140"></a>00140     <span class="keyword">public</span>:
  97 <a name="l00141"></a>00141
  98 <a name="l00142"></a>00142         AnyContainer(<span class="keyword">const</span> T &amp; value) : held(value) {
  99 <a name="l00143"></a>00143         }
 100 <a name="l00144"></a>00144
 101 <a name="l00145"></a>00145         <span class="keyword">virtual</span> <span class="keyword">const</span> std::type_info &amp; type()<span class="keyword"> const </span>{
 102 <a name="l00146"></a>00146             <span class="keywordflow">return</span> <span class="keyword">typeid</span> (T);
 103 <a name="l00147"></a>00147         }
 104 <a name="l00148"></a>00148
 105 <a name="l00149"></a>00149         <span class="keyword">virtual</span> AnyContainerBase * clone()<span class="keyword"> const </span>{
 106 <a name="l00150"></a>00150             <span class="keywordflow">return</span> <span class="keyword">new</span> AnyContainer&lt;T&gt;(held);
 107 <a name="l00151"></a>00151         }
 108 <a name="l00152"></a>00152
 109 <a name="l00153"></a>00153         T held;
 110 <a name="l00154"></a>00154
 111 <a name="l00155"></a>00155     <span class="keyword">private</span>:
 112 <a name="l00156"></a>00156         AnyContainer&lt;T&gt; &amp; operator=(<span class="keyword">const</span> AnyContainer&lt;T&gt; &amp;);
 113 <a name="l00157"></a>00157
 114 <a name="l00158"></a>00158     };
 115 <a name="l00159"></a>00159
 116 <a name="l00160"></a>00160     AnyContainerBase * content;
 117 <a name="l00161"></a>00161 };
 118 <a name="l00162"></a>00162
 119 <a name="l00170"></a><a class="code" href="namespace_sylph.html#1d4330bb87843d404b430a8b8a4b4af5">00170</a> <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt; T * <a class="code" href="namespace_sylph.html#1d4330bb87843d404b430a8b8a4b4af5" title="Cast an Any to the type it is holding.">any_cast</a>(<a class="code" href="class_sylph_1_1_any.html" title="Wrapper class for any kind of class.">Any</a> &amp; any) {
 120 <a name="l00171"></a>00171     check_nullptr(any.<a class="code" href="class_sylph_1_1_any.html#fb53f24e61d99c6e0da59ffc396aea2f">content</a>);
 121 <a name="l00172"></a>00172     <span class="keywordflow">if</span>(any.<a class="code" href="class_sylph_1_1_any.html#77fc0fdfa5c15a6366378f5f770e2e4d" title="Gets the typeinfo of the data pointed to.">type</a>() != <span class="keyword">typeid</span>(T)) <span class="keywordflow">return</span> null;
 122 <a name="l00173"></a>00173     <span class="keywordflow">else</span> <span class="keywordflow">return</span> &amp;(*(<span class="keyword">static_cast&lt;</span>Any::AnyContainer&lt;T&gt; *<span class="keyword">&gt;</span>(any.<a class="code" href="class_sylph_1_1_any.html#fb53f24e61d99c6e0da59ffc396aea2f">content</a>))-&gt;held);
 123 <a name="l00174"></a>00174 }
 124 <a name="l00175"></a>00175 SYLPH_END_NAMESPACE
 125 <a name="l00176"></a>00176
 126 <a name="l00177"></a>00177 <span class="preprocessor">#endif  </span><span class="comment">/* ANY_H_ */</span>
 127 <a name="l00178"></a>00178
 128 </pre></div></div>
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