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<div class="title">check.hpp</div> </div>
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<a href="libprocess_2include_2process_2check_8hpp.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;<span class="comment">// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">// you may not use this file except in compliance with the License.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// You may obtain a copy of the License at</span></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">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">// See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment">// limitations under the License.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor">#ifndef __PROCESS_CHECK_HPP__</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define __PROCESS_CHECK_HPP__</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="stout_2include_2stout_2check_8hpp.html">stout/check.hpp</a>&gt;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="option_8hpp.html">stout/option.hpp</a>&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="future_8hpp.html">process/future.hpp</a>&gt;</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="comment">// Provides a CHECK_PENDING macro, akin to CHECK.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="comment">// This appends the error if possible to the end of the log message, so there&#39;s</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="comment">// no need to append the error message explicitly.</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#a3e2ba5c8589f7f5799251a12409e142c"> 26</a></span>&#160;<span class="preprocessor">#define CHECK_PENDING(expression) \</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor"> CHECK_STATE(CHECK_PENDING, _check_pending, expression)</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#a55bf53e1f554470600774a6bf0c09140"> 29</a></span>&#160;<span class="preprocessor">#define CHECK_READY(expression) \</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor"> CHECK_STATE(CHECK_READY, _check_ready, expression)</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#a4edf36ad649dd87b5e6c199b99805c3c"> 32</a></span>&#160;<span class="preprocessor">#define CHECK_DISCARDED(expression) \</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor"> CHECK_STATE(CHECK_DISCARDED, _check_discarded, expression)</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#a16ba39848d6ce5c97783aef37c5846e0"> 35</a></span>&#160;<span class="preprocessor">#define CHECK_FAILED(expression) \</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="preprocessor"> CHECK_STATE(CHECK_FAILED, _check_failed, expression)</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="comment">// Private structs/functions used for CHECK_*.</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#ac22b41cec5d22e671e56492ef1439c9c"> 41</a></span>&#160;<a class="code" href="classOption.html">Option&lt;Error&gt;</a> <a class="code" href="libprocess_2include_2process_2check_8hpp.html#ac22b41cec5d22e671e56492ef1439c9c">_check_pending</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Future.html">process::Future&lt;T&gt;</a>&amp; <a class="code" href="namespaceprocess.html#a62d5333e8ec1817c249cf83e15d568b4">f</a>)</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;{</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>()) {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is READY&quot;</span>);</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">isDiscarded</a>()) {</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is DISCARDED&quot;</span>);</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#a493227e57f8848e37777b89c0f81e2ec">isFailed</a>()) {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is FAILED: &quot;</span> + f.<a class="code" href="classprocess_1_1Future.html#ae649c56b07f44c05e4b7aa3620133ff9">failure</a>());</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; CHECK(f.<a class="code" href="classprocess_1_1Future.html#af23884cf963eb5ec061595eb2e288903">isPending</a>());</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</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;}</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;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#a621efa2d017ccc6c7eb7c128efc9108d"> 57</a></span>&#160;<a class="code" href="classOption.html">Option&lt;Error&gt;</a> <a class="code" href="libprocess_2include_2process_2check_8hpp.html#a621efa2d017ccc6c7eb7c128efc9108d">_check_ready</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Future.html">process::Future&lt;T&gt;</a>&amp; <a class="code" href="namespaceprocess.html#a62d5333e8ec1817c249cf83e15d568b4">f</a>)</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; <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#af23884cf963eb5ec061595eb2e288903">isPending</a>()) {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is PENDING&quot;</span>);</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">isDiscarded</a>()) {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is DISCARDED&quot;</span>);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#a493227e57f8848e37777b89c0f81e2ec">isFailed</a>()) {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is FAILED: &quot;</span> + f.<a class="code" href="classprocess_1_1Future.html#ae649c56b07f44c05e4b7aa3620133ff9">failure</a>());</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; CHECK(f.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>());</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; }</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;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#a43d01cdf02bf28caeaecb656899b9434"> 73</a></span>&#160;<a class="code" href="classOption.html">Option&lt;Error&gt;</a> <a class="code" href="libprocess_2include_2process_2check_8hpp.html#a43d01cdf02bf28caeaecb656899b9434">_check_discarded</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Future.html">process::Future&lt;T&gt;</a>&amp; <a class="code" href="namespaceprocess.html#a62d5333e8ec1817c249cf83e15d568b4">f</a>)</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="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#af23884cf963eb5ec061595eb2e288903">isPending</a>()) {</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is PENDING&quot;</span>);</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>()) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is READY&quot;</span>);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#a493227e57f8848e37777b89c0f81e2ec">isFailed</a>()) {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">&quot;is FAILED: &quot;</span> + f.<a class="code" href="classprocess_1_1Future.html#ae649c56b07f44c05e4b7aa3620133ff9">failure</a>());</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; CHECK(f.<a class="code" href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">isDiscarded</a>());</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</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;}</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;</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;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="libprocess_2include_2process_2check_8hpp.html#a1c78cc5343f9e5270d4b11c208c6f14a"> 89</a></span>&#160;<a class="code" href="classOption.html">Option&lt;Error&gt;</a> <a class="code" href="libprocess_2include_2process_2check_8hpp.html#a1c78cc5343f9e5270d4b11c208c6f14a">_check_failed</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Future.html">process::Future&lt;T&gt;</a>&amp; <a class="code" href="namespaceprocess.html#a62d5333e8ec1817c249cf83e15d568b4">f</a>)</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;{</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#af23884cf963eb5ec061595eb2e288903">isPending</a>()) {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordflow">return</span> <a class="code" href="some_8hpp.html#a2048f5c3b4ee79448c012cf6dc82a020">Some</a>(<span class="stringliteral">&quot;is PENDING&quot;</span>);</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>()) {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keywordflow">return</span> <a class="code" href="some_8hpp.html#a2048f5c3b4ee79448c012cf6dc82a020">Some</a>(<span class="stringliteral">&quot;is READY&quot;</span>);</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (f.<a class="code" href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">isDiscarded</a>()) {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keywordflow">return</span> <a class="code" href="some_8hpp.html#a2048f5c3b4ee79448c012cf6dc82a020">Some</a>(<span class="stringliteral">&quot;is DISCARDED&quot;</span>);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; CHECK(f.<a class="code" href="classprocess_1_1Future.html#a493227e57f8848e37777b89c0f81e2ec">isFailed</a>());</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;}</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;<span class="comment">// TODO(dhamon): CHECK_NPENDING, CHECK_NREADY, etc.</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;<span class="preprocessor">#endif // __PROCESS_CHECK_HPP__</span></div>
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<div class="ttc" id="classError_html"><div class="ttname"><a href="classError.html">Error</a></div><div class="ttdef"><b>Definition:</b> errorbase.hpp:35</div></div>
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<div class="ttc" id="libprocess_2include_2process_2check_8hpp_html_a1c78cc5343f9e5270d4b11c208c6f14a"><div class="ttname"><a href="libprocess_2include_2process_2check_8hpp.html#a1c78cc5343f9e5270d4b11c208c6f14a">_check_failed</a></div><div class="ttdeci">Option&lt; Error &gt; _check_failed(const process::Future&lt; T &gt; &amp;f)</div><div class="ttdef"><b>Definition:</b> check.hpp:89</div></div>
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<div class="ttc" id="libprocess_2include_2process_2check_8hpp_html_ac22b41cec5d22e671e56492ef1439c9c"><div class="ttname"><a href="libprocess_2include_2process_2check_8hpp.html#ac22b41cec5d22e671e56492ef1439c9c">_check_pending</a></div><div class="ttdeci">Option&lt; Error &gt; _check_pending(const process::Future&lt; T &gt; &amp;f)</div><div class="ttdef"><b>Definition:</b> check.hpp:41</div></div>
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<div class="ttc" id="some_8hpp_html_a2048f5c3b4ee79448c012cf6dc82a020"><div class="ttname"><a href="some_8hpp.html#a2048f5c3b4ee79448c012cf6dc82a020">Some</a></div><div class="ttdeci">_Some&lt; typename std::decay&lt; T &gt;::type &gt; Some(T &amp;&amp;t)</div><div class="ttdef"><b>Definition:</b> some.hpp:42</div></div>
<div class="ttc" id="structNone_html"><div class="ttname"><a href="structNone.html">None</a></div><div class="ttdef"><b>Definition:</b> none.hpp:27</div></div>
<div class="ttc" id="classprocess_1_1Future_html_ae649c56b07f44c05e4b7aa3620133ff9"><div class="ttname"><a href="classprocess_1_1Future.html#ae649c56b07f44c05e4b7aa3620133ff9">process::Future::failure</a></div><div class="ttdeci">const std::string &amp; failure() const </div><div class="ttdef"><b>Definition:</b> future.hpp:1165</div></div>
<div class="ttc" id="libprocess_2include_2process_2check_8hpp_html_a621efa2d017ccc6c7eb7c128efc9108d"><div class="ttname"><a href="libprocess_2include_2process_2check_8hpp.html#a621efa2d017ccc6c7eb7c128efc9108d">_check_ready</a></div><div class="ttdeci">Option&lt; Error &gt; _check_ready(const process::Future&lt; T &gt; &amp;f)</div><div class="ttdef"><b>Definition:</b> check.hpp:57</div></div>
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<div class="ttc" id="classprocess_1_1Future_html"><div class="ttname"><a href="classprocess_1_1Future.html">process::Future</a></div><div class="ttdef"><b>Definition:</b> future.hpp:56</div></div>
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