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<div class="title">type_traits.hpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="preprocessor">#ifndef PROTON_INTERNAL_TYPE_TRAITS_HPP</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="preprocessor">#define PROTON_INTERNAL_TYPE_TRAITS_HPP</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160; </div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * distributed with this work for additional information</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * &quot;License&quot;); you may not use this file except in compliance</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * with the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * software distributed under the License is distributed on an</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> * &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment"> * KIND, either express or implied. See the License for the</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment"> * specific language governing permissions and limitations</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment"> * under the License.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="comment">// Type traits for mapping between AMQP and C++ types.</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="comment">// Also provides workarounds for missing type_traits classes on older</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment">// C++ compilers.</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &quot;./config.hpp&quot;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#include &quot;../types_fwd.hpp&quot;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#include &quot;../type_id.hpp&quot;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor">#include &lt;proton/type_compat.h&gt;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="preprocessor">#include &lt;limits&gt;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceproton.html">proton</a> {</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="keyword">class </span>decoder;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;<span class="keyword">class </span>encoder;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;<span class="keyword">template</span> &lt;<span class="keywordtype">bool</span>, <span class="keyword">class</span> T=<span class="keywordtype">void</span>&gt; <span class="keyword">struct </span>enable_if {};</div>
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<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">struct </span>true_type { <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> value = <span class="keyword">true</span>; };</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="keyword">struct </span>false_type { <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> value = <span class="keyword">false</span>; };</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt; <span class="keyword">struct </span>is_integral : <span class="keyword">public</span> false_type {};</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt; <span class="keyword">struct </span>is_signed : <span class="keyword">public</span> false_type {};</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;char&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;char&gt; { <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> value = std::numeric_limits&lt;char&gt;::is_signed; };</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;unsigned char&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;unsigned short&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;unsigned int&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;unsigned long&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;signed char&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;signed short&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;signed int&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;signed long&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;unsigned short&gt; : <span class="keyword">public</span> false_type {};</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;unsigned int&gt; : <span class="keyword">public</span> false_type {};</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;unsigned long&gt; : <span class="keyword">public</span> false_type {};</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; </div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;signed char&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;signed short&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;signed int&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;signed long&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;<span class="preprocessor">#if PN_CPP_HAS_LONG_LONG_TYPE</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;unsigned long long&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_integral&lt;signed long long&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;unsigned long long&gt; : <span class="keyword">public</span> false_type {};</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="keyword">template</span> &lt;&gt; <span class="keyword">struct </span>is_signed&lt;signed long long&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T, <span class="keyword">class</span> U&gt; <span class="keyword">struct </span>is_same { <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> value=<span class="keyword">false</span>; };</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt; <span class="keyword">struct </span>is_same&lt;T,T&gt; { <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> value=<span class="keyword">true</span>; };</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;<span class="keyword">template</span>&lt; <span class="keyword">class</span> T &gt; <span class="keyword">struct </span>remove_const { <span class="keyword">typedef</span> T type; };</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="keyword">template</span>&lt; <span class="keyword">class</span> T &gt; <span class="keyword">struct </span>remove_const&lt;const T&gt; { <span class="keyword">typedef</span> T type; };</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;<span class="keyword">template</span> &lt;type_<span class="keywordtype">id</span> ID, <span class="keyword">class</span> T&gt; <span class="keyword">struct </span>type_id_constant {</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keyword">typedef</span> T type;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="namespaceproton.html#a83c2656d467d69eb49725c18f5aa13a9">type_id</a> value = ID;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;};</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt; <span class="keyword">struct </span>type_id_of;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;null&gt; : <span class="keyword">public</span> type_id_constant&lt;NULL_TYPE, null&gt; {};</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;uint8_t&gt; : <span class="keyword">public</span> type_id_constant&lt;UBYTE, uint8_t&gt; {};</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;int8_t&gt; : <span class="keyword">public</span> type_id_constant&lt;BYTE, int8_t&gt; {};</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;uint16_t&gt; : <span class="keyword">public</span> type_id_constant&lt;USHORT, uint16_t&gt; {};</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;int16_t&gt; : <span class="keyword">public</span> type_id_constant&lt;SHORT, int16_t&gt; {};</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;uint32_t&gt; : <span class="keyword">public</span> type_id_constant&lt;UINT, uint32_t&gt; {};</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;int32_t&gt; : <span class="keyword">public</span> type_id_constant&lt;INT, int32_t&gt; {};</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;uint64_t&gt; : <span class="keyword">public</span> type_id_constant&lt;ULONG, uint64_t&gt; {};</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;int64_t&gt; : <span class="keyword">public</span> type_id_constant&lt;LONG, int64_t&gt; {};</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;wchar_t&gt; : <span class="keyword">public</span> type_id_constant&lt;CHAR, wchar_t&gt; {};</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;float&gt; : <span class="keyword">public</span> type_id_constant&lt;FLOAT, float&gt; {};</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;double&gt; : <span class="keyword">public</span> type_id_constant&lt;DOUBLE, double&gt; {};</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;timestamp&gt; : <span class="keyword">public</span> type_id_constant&lt;TIMESTAMP, timestamp&gt; {};</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;decimal32&gt; : <span class="keyword">public</span> type_id_constant&lt;DECIMAL32, decimal32&gt; {};</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;decimal64&gt; : <span class="keyword">public</span> type_id_constant&lt;DECIMAL64, decimal64&gt; {};</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;decimal128&gt; : <span class="keyword">public</span> type_id_constant&lt;DECIMAL128, decimal128&gt; {};</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;uuid&gt; : <span class="keyword">public</span> type_id_constant&lt;UUID, uuid&gt; {};</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;std::string&gt; : <span class="keyword">public</span> type_id_constant&lt;STRING, std::string&gt; {};</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;symbol&gt; : <span class="keyword">public</span> type_id_constant&lt;SYMBOL, symbol&gt; {};</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>type_id_of&lt;binary&gt; : <span class="keyword">public</span> type_id_constant&lt;BINARY, binary&gt; {};</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T, <span class="keyword">class</span> Enable=<span class="keywordtype">void</span>&gt; <span class="keyword">struct </span>has_type_id : <span class="keyword">public</span> false_type {};</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt; <span class="keyword">struct </span>has_type_id&lt;T, typename type_id_of&lt;T&gt;::type&gt; : <span class="keyword">public</span> true_type {};</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; </div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;<span class="comment">// The known/unknown integer type magic is required because the C++ standard is</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;<span class="comment">// vague a about the equivalence of integral types for overloading. E.g. char is</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;<span class="comment">// sometimes equivalent to signed char, sometimes unsigned char, sometimes</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;<span class="comment">// neither. int8_t or uint8_t may or may not be equivalent to a char type.</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="comment">// int64_t may or may not be equivalent to long long etc. C++ compilers are also</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;<span class="comment">// allowed to add their own non-standard integer types like __int64, which may</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;<span class="comment">// or may not be equivalent to any of the standard integer types.</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160;<span class="comment">// The solution is to use a fixed, standard set of integer types that are</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160;<span class="comment">// guaranteed to be distinct for overloading (see type_id_of) and to use template</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160;<span class="comment">// specialization to convert other integer types to a known integer type with the</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;<span class="comment">// same sizeof and is_signed.</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; </div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;<span class="comment">// Map arbitrary integral types to known integral types.</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;<span class="keyword">template</span>&lt;<span class="keywordtype">size_t</span> SIZE, <span class="keywordtype">bool</span> IS_SIGNED&gt; <span class="keyword">struct </span>integer_type;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;1, true&gt; { <span class="keyword">typedef</span> int8_t type; };</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;2, true&gt; { <span class="keyword">typedef</span> int16_t type; };</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;4, true&gt; { <span class="keyword">typedef</span> int32_t type; };</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;8, true&gt; { <span class="keyword">typedef</span> int64_t type; };</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;1, false&gt; { <span class="keyword">typedef</span> uint8_t type; };</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;2, false&gt; { <span class="keyword">typedef</span> uint16_t type; };</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;4, false&gt; { <span class="keyword">typedef</span> uint32_t type; };</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;<span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>integer_type&lt;8, false&gt; { <span class="keyword">typedef</span> uint64_t type; };</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;<span class="comment">// True if T is an integer type that does not have an explicit type_id.</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt; <span class="keyword">struct </span>is_unknown_integer {</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> value = !has_type_id&lt;T&gt;::value &amp;&amp; is_integral&lt;T&gt;::value;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160;};</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; </div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;template&lt;class T, class = typename enable_if&lt;is_unknown_integer&lt;T&gt;::value&gt;::type&gt;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160;<span class="keyword">struct </span>known_integer : <span class="keyword">public</span> integer_type&lt;sizeof(T), is_signed&lt;T&gt;::value&gt; {};</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; </div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160;<span class="comment">// Helper base for SFINAE templates.</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160;<span class="keyword">struct </span>sfinae {</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <span class="keyword">typedef</span> <span class="keywordtype">char</span> yes;</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <span class="keyword">typedef</span> <span class="keywordtype">double</span> no;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <span class="keyword">struct </span>any_t {</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; <span class="keyword">template</span> &lt; <span class="keyword">typename</span> T &gt; any_t(T <span class="keyword">const</span>&amp;);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; };</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;};</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; </div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> From, <span class="keyword">class</span> To&gt; <span class="keyword">struct </span>is_convertible : <span class="keyword">public</span> sfinae {</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; <span class="keyword">static</span> yes test(<span class="keyword">const</span> To&amp;);</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; <span class="keyword">static</span> no test(...);</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="keyword">static</span> <span class="keyword">const</span> From&amp; from;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="comment">// Windows compilers warn about data-loss caused by legal conversions. We</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <span class="comment">// can&#39;t use static_cast because that will cause a hard error instead of</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="comment">// letting SFINAE overload resolution select the test(...) overload.</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;<span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160;<span class="preprocessor">#pragma warning( push )</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160;<span class="preprocessor">#pragma warning( disable : 4244 )</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> value = <span class="keyword">sizeof</span>(test(from)) == <span class="keyword">sizeof</span>(yes);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160;<span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;<span class="preprocessor">#pragma warning( pop )</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160;};</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; </div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160;} <span class="comment">// internal</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;} <span class="comment">// proton</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; </div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160;<span class="preprocessor">#endif // PROTON_INTERNAL_TYPE_TRAITS_HPP</span></div>
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<div class="ttc" id="anamespaceproton_html_a83c2656d467d69eb49725c18f5aa13a9"><div class="ttname"><a href="namespaceproton.html#a83c2656d467d69eb49725c18f5aa13a9">proton::type_id</a></div><div class="ttdeci">type_id</div><div class="ttdoc">An identifier for AMQP types.</div><div class="ttdef"><b>Definition:</b> type_id.hpp:37</div></div>
<div class="ttc" id="anamespaceproton_html"><div class="ttname"><a href="namespaceproton.html">proton</a></div><div class="ttdoc">The main Proton namespace.</div><div class="ttdef"><b>Definition:</b> annotation_key.hpp:33</div></div>
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