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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;# Maybe Result</div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;</div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;[![Build Status](https://travis-ci.org/trafi/maybe-result-cpp.svg?branch=master)](https://travis-ci.org/trafi/maybe-result-cpp)</div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;Maybe Result is a return value wrapper that can contain either a value</div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;`T` or error `E`. It borrows ideas heavily from the [C++17&#39;s</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;`std::experimental::optional`][optional], [Rust&#39;s std::result][result] and</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;the [`std::expected`][expected] that was proposed but not yet accepted</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;for C++17.</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;[optional]: http://en.cppreference.com/w/cpp/experimental/optional</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;[result]: https://doc.rust-lang.org/std/result/</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;[expected]: https://github.com/ptal/expected</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;- [Browse reference docs](https://trafi.github.io/maybe-result-cpp/annotated.html).</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;- [See example usage](https://github.com/trafi/maybe-result-cpp/tree/master/examples).</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;### How is it different from `std::experimental::optional`?</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;Has a value for error instead of `nullopt`.</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;### How is it different from `std::expected`?</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;It does not require the error to be an exception, and does not fall back to</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;exceptions. All values must be checked, similar to `std::experimental::optional`.</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;## Setting up</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;This is header-only library. We recommend to add `src` to included directories,</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;so that the include would be:</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;```</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;#include &lt;maybe/result.hpp&gt;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;```</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;A C++ compiler shat supports C++14 is required.</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;You can use `-std=c++14` flag for sufficiently recent versions of</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;`GCC` (5.2) or `CLANG` (3.7).</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;__Warning! Library is highly experimental and is not guaranteed to work.__</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;## Running tests</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;```</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;cmake .</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;make tests &amp;&amp; ./tests/tests</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;```</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;There is a script that does this automatically:</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;```</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;./dev/run-tests.sh</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;In addition to this, you can run tests on all supported compilers using docker:</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;```</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;./dev/docker-run-tests.sh</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;```</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;## License</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;Licensed under either of</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;at your option.</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;### Contribution</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;Unless you explicitly state otherwise, any contribution intentionally</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;submitted for inclusion in the work by you, as defined in the Apache-2.0</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;license, shall be dual licensed as above, without any additional terms or</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;conditions.</div>
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Public Member Functions</h2></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>bad_result_access</b> (const std::string &amp;__arg)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<p>Definition at line <a class="el" href="result_8hpp_source.html#l00024">24</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
</div><hr/>The documentation for this class was generated from the following file:<ul>
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<li class="navelem"><b>maybe</b></li><li class="navelem"><a class="el" href="singletonmaybe_1_1result.html">result</a></li> </ul>
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<tr class="even"><td class="entry"><a class="el" href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">and_then</a>(F op) noexcept-&gt; typename std::result_of&lt; F(T)&gt;::type</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
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<tr bgcolor="#f0f0f0"><td class="entry"><b>err_type</b> typedef (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>err_value</b>() const &amp; (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>err_value</b>()&amp; (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
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<tr><td class="entry"><a class="el" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">map_err</a>(F f) noexcept-&gt; maybe::result&lt; T, typename std::result_of&lt; F(E)&gt;::type &gt;</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr class="even"><td class="entry"><a class="el" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">map_err_value</a>(U value) noexcept-&gt; maybe::result&lt; T, U &gt;</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr><td class="entry"><a class="el" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">map_value</a>(U value) noexcept-&gt; maybe::result&lt; U, E &gt;</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr class="even"><td class="entry"><a class="el" href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23">map_void</a>() noexcept-&gt; maybe::result&lt; void, E &gt;</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr><td class="entry"><a class="el" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">ok</a>(T &amp;&amp;value) noexcept</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">static</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>ok</b>(const T &amp;value) noexcept (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">static</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>ok_type</b> typedef (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>ok_value</b>() const &amp; (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>ok_value</b>()&amp; (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>ok_value</b>()&amp;&amp; (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>ok_value_or</b>(V &amp;&amp;v) const &amp; (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>ok_value_or</b>(V &amp;&amp;v)&amp;&amp; (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>operator bool</b>() const noexcept (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">explicit</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>result</b>() (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>result</b>(T &amp;&amp;value, internal::placeholder) (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>result</b>(internal::placeholder, E &amp;&amp;value) (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>result</b>(const T &amp;value, internal::placeholder) (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>result</b>(internal::placeholder, const E &amp;value) (defined in <a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a>)</td><td class="entry"><a class="el" href="singletonmaybe_1_1result.html">maybe::result&lt; T, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
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<li class="navelem"><b>maybe</b></li><li class="navelem"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result< void, E ></a></li> </ul>
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<div class="title">maybe::result&lt; void, E &gt; Member List</div> </div>
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<p>This is the complete list of members for <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>, including all inherited members.</p>
<table class="directory">
<tr class="even"><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#abcc692c40f1676a46fb2691384ea12eb">and_then</a>(F op) noexcept-&gt; typename std::result_of&lt; F()&gt;::type</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a0e285d612e4a247383c34b49a327b82d">default_err</a>() noexcept</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">static</span></td></tr>
<tr class="even"><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#af287a4cda77532f1bf8bdc214c065f33">default_ok</a>() noexcept</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">static</span></td></tr>
<tr><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a208905425bb1feb2d0932e263766c062">err</a>(E &amp;&amp;value) noexcept</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">static</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>err</b>(const E &amp;value) noexcept (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">static</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>err_type</b> typedef (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>err_value</b>() const &amp; (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>err_value</b>()&amp; (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>err_value</b>()&amp;&amp; (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>err_value_or</b>(V &amp;&amp;v) const &amp; (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>err_value_or</b>(V &amp;&amp;v)&amp;&amp; (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#add13d3ae96432884510b9cb6ba36a04e">into_err</a>() noexcept-&gt; maybe::result&lt; void, E &gt;</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr class="even"><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ae23f25fa8fe4d75a7f3377a42f2810de">is_err</a>() const noexcept</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#afd7ac440b9b5a697188786aeded7595e">is_ok</a>() const noexcept</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr class="even"><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ac52afdff126d184422c82793c067525c">map</a>(F f) noexcept-&gt; maybe::result&lt; typename std::result_of&lt; F()&gt;::type, E &gt;</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a71d41f929546de3f92beac47ec14d499">map_err</a>(F f) noexcept-&gt; maybe::result&lt; void, typename std::result_of&lt; F(E)&gt;::type &gt;</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr class="even"><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3f0f046607805505ac24262af20b3a9d">map_err_value</a>(U value) noexcept-&gt; maybe::result&lt; void, U &gt;</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3d9c188e3a57bbb7f2fd2f97c70a02c0">map_value</a>(U value) noexcept-&gt; maybe::result&lt; U, E &gt;</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr class="even"><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a144e724691eb07f9f666b5c08d2f06bf">ok</a>() noexcept</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">static</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>ok_type</b> typedef (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>ok_value</b>() (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>operator bool</b>() const noexcept (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span><span class="mlabel">explicit</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>result</b>() (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>result</b>(internal::placeholder, E &amp;&amp;value) (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>result</b>(internal::placeholder, const E &amp;value) (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0"><td class="entry"><b>result</b>(E &amp;&amp;value) (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
<tr bgcolor="#f0f0f0" class="even"><td class="entry"><b>result</b>(const E &amp;value) (defined in <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a>)</td><td class="entry"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></td><td class="entry"><span class="mlabel">inline</span></td></tr>
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<li class="navelem"><b>maybe</b></li><li class="navelem"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result< void, E ></a></li> </ul>
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Public Types</h2></td></tr>
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typedef void&#160;</td><td class="memItemRight" valign="bottom"><b>ok_type</b></td></tr>
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typedef E&#160;</td><td class="memItemRight" valign="bottom"><b>err_type</b></td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a244fd5a945917377dad5477f390516c1"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a244fd5a945917377dad5477f390516c1"></a>
&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (internal::placeholder, E &amp;&amp;value)</td></tr>
<tr class="separator:a244fd5a945917377dad5477f390516c1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:affd93abd0243a627f16cf236d2b2d0ba"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="affd93abd0243a627f16cf236d2b2d0ba"></a>
&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (internal::placeholder, const E &amp;value)</td></tr>
<tr class="separator:affd93abd0243a627f16cf236d2b2d0ba"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1ae143798ca4c6f42496b28abeb4d88a"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1ae143798ca4c6f42496b28abeb4d88a"></a>
&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (E &amp;&amp;value)</td></tr>
<tr class="separator:a1ae143798ca4c6f42496b28abeb4d88a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a91e58613f141e0690c6dc0bc8f0b0eda"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a91e58613f141e0690c6dc0bc8f0b0eda"></a>
&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (const E &amp;value)</td></tr>
<tr class="separator:a91e58613f141e0690c6dc0bc8f0b0eda"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:afd7ac440b9b5a697188786aeded7595e"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#afd7ac440b9b5a697188786aeded7595e">is_ok</a> () const noexcept</td></tr>
<tr class="separator:afd7ac440b9b5a697188786aeded7595e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae23f25fa8fe4d75a7f3377a42f2810de"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ae23f25fa8fe4d75a7f3377a42f2810de">is_err</a> () const noexcept</td></tr>
<tr class="separator:ae23f25fa8fe4d75a7f3377a42f2810de"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1ab3ce7c641ee11457d376ce6df65b41"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1ab3ce7c641ee11457d376ce6df65b41"></a>
&#160;</td><td class="memItemRight" valign="bottom"><b>operator bool</b> () const noexcept</td></tr>
<tr class="separator:a1ab3ce7c641ee11457d376ce6df65b41"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a734227e6677cbb51c153f6e3b83432a6"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a734227e6677cbb51c153f6e3b83432a6"></a>
void&#160;</td><td class="memItemRight" valign="bottom"><b>ok_value</b> ()</td></tr>
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<tr class="memitem:a4439d22f7d1f6ba97b456aa43ca17ad2"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4439d22f7d1f6ba97b456aa43ca17ad2"></a>
constexpr E const &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>err_value</b> () const &amp;</td></tr>
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constexpr E &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>err_value</b> ()&amp;</td></tr>
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constexpr E &amp;&amp;&#160;</td><td class="memItemRight" valign="bottom"><b>err_value</b> ()&amp;&amp;</td></tr>
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template&lt;class V &gt; </td></tr>
<tr class="memitem:a8f0dd5f4b3b7c604d9b9c01c7bc5a094"><td class="memTemplItemLeft" align="right" valign="top">constexpr E&#160;</td><td class="memTemplItemRight" valign="bottom"><b>err_value_or</b> (V &amp;&amp;v) const &amp;</td></tr>
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template&lt;class V &gt; </td></tr>
<tr class="memitem:aa8f4aefffc45ea6081553f3f1f7c95b1"><td class="memTemplItemLeft" align="right" valign="top">constexpr E&#160;</td><td class="memTemplItemRight" valign="bottom"><b>err_value_or</b> (V &amp;&amp;v)&amp;&amp;</td></tr>
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<tr class="memitem:ac52afdff126d184422c82793c067525c"><td class="memTemplParams" colspan="2">template&lt;typename F &gt; </td></tr>
<tr class="memitem:ac52afdff126d184422c82793c067525c"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ac52afdff126d184422c82793c067525c">map</a> (F f) noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; typename std::result_of&lt; F()&gt;::type, E &gt;</td></tr>
<tr class="separator:ac52afdff126d184422c82793c067525c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3d9c188e3a57bbb7f2fd2f97c70a02c0"><td class="memTemplParams" colspan="2">template&lt;typename U &gt; </td></tr>
<tr class="memitem:a3d9c188e3a57bbb7f2fd2f97c70a02c0"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3d9c188e3a57bbb7f2fd2f97c70a02c0">map_value</a> (U value) noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; U, E &gt;</td></tr>
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<tr class="memitem:a71d41f929546de3f92beac47ec14d499"><td class="memTemplParams" colspan="2">template&lt;typename F &gt; </td></tr>
<tr class="memitem:a71d41f929546de3f92beac47ec14d499"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a71d41f929546de3f92beac47ec14d499">map_err</a> (F f) noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, typename std::result_of&lt; F(E)&gt;::type &gt;</td></tr>
<tr class="separator:a71d41f929546de3f92beac47ec14d499"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3f0f046607805505ac24262af20b3a9d"><td class="memTemplParams" colspan="2">template&lt;typename U &gt; </td></tr>
<tr class="memitem:a3f0f046607805505ac24262af20b3a9d"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3f0f046607805505ac24262af20b3a9d">map_err_value</a> (U value) noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, U &gt;</td></tr>
<tr class="separator:a3f0f046607805505ac24262af20b3a9d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abcc692c40f1676a46fb2691384ea12eb"><td class="memTemplParams" colspan="2">template&lt;typename F &gt; </td></tr>
<tr class="memitem:abcc692c40f1676a46fb2691384ea12eb"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#abcc692c40f1676a46fb2691384ea12eb">and_then</a> (F op) noexcept-&gt; typename std::result_of&lt; F()&gt;::type</td></tr>
<tr class="separator:abcc692c40f1676a46fb2691384ea12eb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:add13d3ae96432884510b9cb6ba36a04e"><td class="memItemLeft" align="right" valign="top">auto&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#add13d3ae96432884510b9cb6ba36a04e">into_err</a> () noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;</td></tr>
<tr class="separator:add13d3ae96432884510b9cb6ba36a04e"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:a144e724691eb07f9f666b5c08d2f06bf"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; void, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a144e724691eb07f9f666b5c08d2f06bf">ok</a> () noexcept</td></tr>
<tr class="separator:a144e724691eb07f9f666b5c08d2f06bf"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a208905425bb1feb2d0932e263766c062"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; void, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a208905425bb1feb2d0932e263766c062">err</a> (E &amp;&amp;value) noexcept</td></tr>
<tr class="separator:a208905425bb1feb2d0932e263766c062"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa060e9939d88b577dd237e9f089fc549"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa060e9939d88b577dd237e9f089fc549"></a>
static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; void, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>err</b> (const E &amp;value) noexcept</td></tr>
<tr class="separator:aa060e9939d88b577dd237e9f089fc549"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af287a4cda77532f1bf8bdc214c065f33"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; void, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#af287a4cda77532f1bf8bdc214c065f33">default_ok</a> () noexcept</td></tr>
<tr class="separator:af287a4cda77532f1bf8bdc214c065f33"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0e285d612e4a247383c34b49a327b82d"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; void, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a0e285d612e4a247383c34b49a327b82d">default_err</a> () noexcept</td></tr>
<tr class="separator:a0e285d612e4a247383c34b49a327b82d"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename E&gt;<br />
class maybe::result&lt; void, E &gt;</h3>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00315">315</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a class="anchor" id="abcc692c40f1676a46fb2691384ea12eb"></a>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename E &gt; </div>
<div class="memtemplate">
template&lt;typename F &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::and_then </td>
<td>(</td>
<td class="paramtype">F&#160;</td>
<td class="paramname"><em>op</em></td><td>)</td>
<td> -&gt; typename std::result_of&lt;F()&gt;::type</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Calls op if the result is ok, otherwise returns the err value of self.</p>
<p>This function can be used for control flow based on result values.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">f</td><td>F() -&gt; maybe::result&lt;U, E&gt; </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;U, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00143">143</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00088">maybe::result&lt; T, E &gt;::err()</a>.</p>
</div>
</div>
<a class="anchor" id="a0e285d612e4a247383c34b49a327b82d"></a>
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<td class="memname">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt;void, E&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::default_err </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span><span class="mlabel">noexcept</span></span> </td>
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</table>
</div><div class="memdoc">
<p>Create a new err value using <code>E()</code> constructor.</p>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00385">385</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
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<a class="anchor" id="af287a4cda77532f1bf8bdc214c065f33"></a>
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<td class="memname">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt;void, E&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::default_ok </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span><span class="mlabel">noexcept</span></span> </td>
</tr>
</table>
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<p>Create a new ok value using <code>void()</code> constructor.</p>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00375">375</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
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</div>
<a class="anchor" id="a208905425bb1feb2d0932e263766c062"></a>
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<td class="memname">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt;void, E&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::err </td>
<td>(</td>
<td class="paramtype">E &amp;&amp;&#160;</td>
<td class="paramname"><em>value</em></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span><span class="mlabel">noexcept</span></span> </td>
</tr>
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</div><div class="memdoc">
<p>Create a new err value.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">E</td><td>value </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00360">360</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
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<a class="anchor" id="add13d3ae96432884510b9cb6ba36a04e"></a>
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template&lt;typename E &gt; </div>
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<tr>
<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::into_err </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;void, E&gt;</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
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</table>
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<p>Converts into another result with ok type void and forwards the same error.</p>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt;void, E&gt;</a> </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00154">154</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00104">maybe::result&lt; T, E &gt;::default_ok()</a>, and <a class="el" href="result_8hpp_source.html#l00136">maybe::result&lt; T, E &gt;::is_err()</a>.</p>
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<a class="anchor" id="ae23f25fa8fe4d75a7f3377a42f2810de"></a>
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<div class="memtemplate">
template&lt;typename E &gt; </div>
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<td class="memname">bool <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::is_err </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
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</div><div class="memdoc">
<p>Check if result contains err value.</p>
<dl class="section return"><dt>Returns</dt><dd>bool </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00407">407</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
</div>
</div>
<a class="anchor" id="afd7ac440b9b5a697188786aeded7595e"></a>
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<td class="memname">bool <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::is_ok </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
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<p>Check if result contains ok value.</p>
<dl class="section return"><dt>Returns</dt><dd>bool </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00397">397</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
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<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::map </td>
<td>(</td>
<td class="paramtype">F&#160;</td>
<td class="paramname"><em>f</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;typename std::result_of&lt;F()&gt;::type, E&gt;</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
</tr>
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</div><div class="memdoc">
<p>Maps a <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> to result&lt;U, E&gt; (where U is return value of F(void)) by applying a function F to a contained ok value, leaving an err value untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">f</td><td>F() -&gt; U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;U, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00095">95</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
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<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::map_err </td>
<td>(</td>
<td class="paramtype">F&#160;</td>
<td class="paramname"><em>f</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;void, typename std::result_of&lt;F(E)&gt;::type&gt;</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
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</table>
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<p>Maps a <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> to result&lt;void, U&gt; (where U is return value of F(E)) by applying a function to a function to a contained err value, leaving an ok value untouched.</p>
<p>This function can be used to pass through a successful result while changing an error.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">f</td><td>F(E) -&gt; U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;void, U&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00119">119</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
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<a class="anchor" id="a3f0f046607805505ac24262af20b3a9d"></a>
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template&lt;typename E &gt; </div>
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<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::map_err_value </td>
<td>(</td>
<td class="paramtype">U&#160;</td>
<td class="paramname"><em>value</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;void, U&gt;</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
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</div><div class="memdoc">
<p>Maps a <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> to result&lt;void, U&gt; by always returning provided U value on error, leaving an ok value untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;void, U&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00132">132</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00071">maybe::result&lt; T, E &gt;::ok()</a>.</p>
</div>
</div>
<a class="anchor" id="a3d9c188e3a57bbb7f2fd2f97c70a02c0"></a>
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template&lt;typename E &gt; </div>
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template&lt;typename U &gt; </div>
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<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::map_value </td>
<td>(</td>
<td class="paramtype">U&#160;</td>
<td class="paramname"><em>value</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;U, E&gt;</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">noexcept</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Maps a <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> to result&lt;U, E&gt; by always returning provided U value on success, leaving an err value untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;U, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00108">108</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00088">maybe::result&lt; T, E &gt;::err()</a>.</p>
</div>
</div>
<a class="anchor" id="a144e724691eb07f9f666b5c08d2f06bf"></a>
<div class="memitem">
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template&lt;typename E &gt; </div>
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<tr>
<td class="mlabels-left">
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<tr>
<td class="memname">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt;void, E&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; void, E &gt;::ok </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span><span class="mlabel">noexcept</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Create a new ok value.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">void</td><td>value </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00349">349</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following files:<ul>
<li>src/maybe/<a class="el" href="result_8hpp_source.html">result.hpp</a></li>
<li>src/maybe/<a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a></li>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</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="keyword">using</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result</a>;</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="keyword">using namespace </span><a class="code" href="namespacestd.html">std</a>;</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">/**</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * Error type.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="keyword">enum class</span> LoadError {</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160; FileNotFound,</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="comment"></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * Example function that returns a successful result or error depending on param.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<a class="code" href="singletonmaybe_1_1result.html">result&lt;vector&lt;string&gt;</a>, LoadError&gt; load_names(<span class="keywordtype">bool</span> return_successfully)</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;{</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keywordflow">if</span> (return_successfully) {</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;vector&lt;string&gt;</a>, LoadError&gt;::ok({<span class="stringliteral">&quot;Bob&quot;</span>, <span class="stringliteral">&quot;Alice&quot;</span>});</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;vector&lt;string&gt;</a>, LoadError&gt;::err(LoadError::FileNotFound);</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; }</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"></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"> * Chain both functions and merge results into one.</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment"> * If `return_success_from_first` is false, the fist function will fail.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<a class="code" href="singletonmaybe_1_1result.html">result&lt;size_t, string&gt;</a> run(<span class="keywordtype">bool</span> return_success_from_first)</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;{</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; <span class="keywordflow">return</span> load_names(success) <span class="comment">// function will fail depending on flag</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="comment">// run this if previous succeeds</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; .and_then([](<span class="keyword">auto</span> prev_names) {</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="comment">// combine results of both</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keywordflow">return</span> load_names(<span class="keyword">true</span>).map([prev_names](<span class="keyword">auto</span> more_names) {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; vector&lt;string&gt; all;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; copy(prev_names.begin(), prev_names.end(), back_inserter(all));</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; copy(more_names.begin(), more_names.end(), back_inserter(all));</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordflow">return</span> all;</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; })</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="comment">// change error from LoadError to string</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; .map_err([](<span class="keyword">auto</span> err) {</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keywordflow">if</span> (err == LoadError::FileNotFound) {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordflow">return</span> string(<span class="stringliteral">&quot;file not found&quot;</span>);</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; }</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keywordflow">return</span> string(<span class="stringliteral">&quot;other error&quot;</span>);</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="comment">// map result value to the number of elements in vector</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; .map([](vector&lt;string&gt; results) { <span class="keywordflow">return</span> results.size(); });</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;<span class="keywordtype">void</span> main() {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keyword">auto</span> success_result = run(<span class="keyword">true</span>);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; assert(success_result);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; assert(success_result.ok_value() == 4);</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">auto</span> error_result = run(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; assert(!error_result);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; assert(error_result.err_value() == <span class="stringliteral">&quot;file not found&quot;</span>);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;}</div>
<div class="ttc" id="namespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div><div class="ttdoc">STL namespace. </div></div>
<div class="ttc" id="singletonmaybe_1_1result_html"><div class="ttname"><a href="singletonmaybe_1_1result.html">maybe::result</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8fwd_8hpp_source.html#l00015">result.fwd.hpp:15</a></div></div>
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, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#abcc692c40f1676a46fb2691384ea12eb">maybe::result&lt; void, E &gt;</a>
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<li>into_err()
: <a class="el" href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#add13d3ae96432884510b9cb6ba36a04e">maybe::result&lt; void, E &gt;</a>
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<li>is_err()
: <a class="el" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ae23f25fa8fe4d75a7f3377a42f2810de">maybe::result&lt; void, E &gt;</a>
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: <a class="el" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#afd7ac440b9b5a697188786aeded7595e">maybe::result&lt; void, E &gt;</a>
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: <a class="el" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ac52afdff126d184422c82793c067525c">maybe::result&lt; void, E &gt;</a>
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<li>map_err()
: <a class="el" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a71d41f929546de3f92beac47ec14d499">maybe::result&lt; void, E &gt;</a>
</li>
<li>map_err_value()
: <a class="el" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3f0f046607805505ac24262af20b3a9d">maybe::result&lt; void, E &gt;</a>
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<li>map_value()
: <a class="el" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3d9c188e3a57bbb7f2fd2f97c70a02c0">maybe::result&lt; void, E &gt;</a>
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<li>map_void()
: <a class="el" href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23">maybe::result&lt; T, E &gt;</a>
</li>
<li>ok()
: <a class="el" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a144e724691eb07f9f666b5c08d2f06bf">maybe::result&lt; void, E &gt;</a>
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&#160;<ul>
<li>and_then()
: <a class="el" href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#abcc692c40f1676a46fb2691384ea12eb">maybe::result&lt; void, E &gt;</a>
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<li>default_err()
: <a class="el" href="singletonmaybe_1_1result.html#aa551222749a10e8d69b75a081a59b61f">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a0e285d612e4a247383c34b49a327b82d">maybe::result&lt; void, E &gt;</a>
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<li>default_ok()
: <a class="el" href="singletonmaybe_1_1result.html#a556c18ac62ab6c7d6a4fa00ce62a74d4">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#af287a4cda77532f1bf8bdc214c065f33">maybe::result&lt; void, E &gt;</a>
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<li>err()
: <a class="el" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a208905425bb1feb2d0932e263766c062">maybe::result&lt; void, E &gt;</a>
</li>
<li>into_err()
: <a class="el" href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#add13d3ae96432884510b9cb6ba36a04e">maybe::result&lt; void, E &gt;</a>
</li>
<li>is_err()
: <a class="el" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ae23f25fa8fe4d75a7f3377a42f2810de">maybe::result&lt; void, E &gt;</a>
</li>
<li>is_ok()
: <a class="el" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#afd7ac440b9b5a697188786aeded7595e">maybe::result&lt; void, E &gt;</a>
</li>
<li>map()
: <a class="el" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ac52afdff126d184422c82793c067525c">maybe::result&lt; void, E &gt;</a>
</li>
<li>map_err()
: <a class="el" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a71d41f929546de3f92beac47ec14d499">maybe::result&lt; void, E &gt;</a>
</li>
<li>map_err_value()
: <a class="el" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3f0f046607805505ac24262af20b3a9d">maybe::result&lt; void, E &gt;</a>
</li>
<li>map_value()
: <a class="el" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3d9c188e3a57bbb7f2fd2f97c70a02c0">maybe::result&lt; void, E &gt;</a>
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<li>map_void()
: <a class="el" href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23">maybe::result&lt; T, E &gt;</a>
</li>
<li>ok()
: <a class="el" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">maybe::result&lt; T, E &gt;</a>
, <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a144e724691eb07f9f666b5c08d2f06bf">maybe::result&lt; void, E &gt;</a>
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<div class="textblock">This inheritance list is sorted roughly, but not completely, alphabetically:</div><div class="directory">
<div class="levels">[detail level <span onclick="javascript:toggleLevel(1);">1</span><span onclick="javascript:toggleLevel(2);">2</span><span onclick="javascript:toggleLevel(3);">3</span>]</div><table class="directory">
<tr id="row_0_" class="even"><td class="entry"><span style="width:0px;display:inline-block;">&#160;</span><span id="arr_0_" class="arrow" onclick="toggleFolder('0_')">&#9660;</span><span class="icona"><span class="icon">C</span></span><b>std::exception</b></td><td class="desc">STL class </td></tr>
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<tr id="row_0_0_0_" class="even"><td class="entry"><span style="width:48px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="classmaybe_1_1bad__result__access.html" target="_self">maybe::bad_result_access</a></td><td class="desc"></td></tr>
<tr id="row_1_"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="singletonmaybe_1_1result.html" target="_self">maybe::result&lt; T, E &gt;</a></td><td class="desc"></td></tr>
<tr id="row_2_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html" target="_self">maybe::result&lt; void, E &gt;</a></td><td class="desc"></td></tr>
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<div class="textblock"><p><a href="https://travis-ci.org/trafi/maybe-result-cpp">![Build Status](https://travis-ci.org/trafi/maybe-result-cpp.svg?branch=master)</a></p>
<p>Maybe Result is a return value wrapper that can contain either a value <code>T</code> or error <code>E</code>. It borrows ideas heavily from the <a href="http://en.cppreference.com/w/cpp/experimental/optional">C++17's `std::experimental::optional`</a>, <a href="https://doc.rust-lang.org/std/result/">Rust's std::result</a> and the <a href="https://github.com/ptal/expected">`std::expected`</a> that was proposed but not yet accepted for C++17.</p>
<ul>
<li><a href="https://trafi.github.io/maybe-result-cpp/annotated.html">Browse reference docs</a>.</li>
<li><a href="https://github.com/trafi/maybe-result-cpp/tree/master/examples">See example usage</a>.</li>
</ul>
<h3>How is it different from <code>std::experimental::optional</code>?</h3>
<p>Has a value for error instead of <code>nullopt</code>.</p>
<h3>How is it different from <code>std::expected</code>?</h3>
<p>It does not require the error to be an exception, and does not fall back to exceptions. All values must be checked, similar to <code>std::experimental::optional</code>.</p>
<h2>Setting up</h2>
<p>This is header-only library. We recommend to add <code>src</code> to included directories, so that the include would be:</p>
<p>``` #include &lt;<a class="el" href="result_8hpp_source.html">maybe/result.hpp</a>&gt; ```</p>
<p>A C++ compiler shat supports C++14 is required. You can use <code>-std=c++14</code> flag for sufficiently recent versions of <code>GCC</code> (5.2) or <code>CLANG</code> (3.7).</p>
<p><b>Warning! Library is highly experimental and is not guaranteed to work.</b></p>
<h2>Running tests</h2>
<p>``` cmake . make tests &amp;&amp; ./tests/tests ```</p>
<p>There is a script that does this automatically:</p>
<p>``` ./dev/run-tests.sh ```</p>
<p>In addition to this, you can run tests on all supported compilers using docker:</p>
<p>``` ./dev/docker-run-tests.sh ```</p>
<h2>License</h2>
<p>Licensed under either of</p>
<ul>
<li>Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or <a href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a>)</li>
<li>MIT license ([LICENSE-MIT](LICENSE-MIT) or <a href="http://opensource.org/licenses/MIT">http://opensource.org/licenses/MIT</a>)</li>
</ul>
<p>at your option.</p>
<h3>Contribution</h3>
<p>Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. </p>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Copyright 2016 TRAFI</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0, &lt;LICENSE-APACHE or</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * http://apache.org/licenses/LICENSE-2.0&gt; or the MIT license &lt;LICENSE-MIT or</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * http://opensource.org/licenses/MIT&gt;, at your option. This file may not be</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * copied, modified, or distributed except according to those terms.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#pragma once</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="keyword">namespace </span><a class="code" href="namespacemaybe.html">maybe</a> {</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00015"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html"> 15</a></span>&#160; <span class="keyword">class </span><a class="code" href="singletonmaybe_1_1result.html">result</a>;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; <span class="keyword">class </span><a class="code" href="singletonmaybe_1_1result.html">result</a>&lt;void, E&gt;;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;}</div>
<div class="ttc" id="namespacemaybe_html"><div class="ttname"><a href="namespacemaybe.html">maybe</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8fwd_8hpp_source.html#l00013">result.fwd.hpp:13</a></div></div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Copyright 2016 TRAFI</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0, &lt;LICENSE-APACHE or</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * http://apache.org/licenses/LICENSE-2.0&gt; or the MIT license &lt;LICENSE-MIT or</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * http://opensource.org/licenses/MIT&gt;, at your option. This file may not be</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * copied, modified, or distributed except according to those terms.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#pragma once</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">#include &quot;result.fwd.hpp&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#include &lt;experimental/optional&gt;</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="keyword">namespace </span><a class="code" href="namespacemaybe.html">maybe</a> {</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; <span class="keyword">struct </span>placeholder {</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; };</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;</div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="classmaybe_1_1bad__result__access.html"> 24</a></span>&#160; <span class="keyword">class </span><a class="code" href="classmaybe_1_1bad__result__access.html">bad_result_access</a> : <span class="keyword">public</span> std::logic_error</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="comment">// XXX Should not be inline</span></div>
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<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="keyword">explicit</span> <a class="code" href="classmaybe_1_1bad__result__access.html">bad_result_access</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* __arg) : std::logic_error(__arg) { }</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keyword">virtual</span> ~<a class="code" href="classmaybe_1_1bad__result__access.html">bad_result_access</a>() noexcept = <span class="keywordflow">default</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;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keyword">class </span><a class="code" href="singletonmaybe_1_1result.html">result</a> final {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; std::experimental::optional&lt;T&gt; var_ok;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; std::experimental::optional&lt;E&gt; var_err;</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">public</span>:</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="keyword">typedef</span> T ok_type;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keyword">typedef</span> E err_type;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result</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; }</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; result(T&amp;&amp; value, internal::placeholder) : var_ok(<a class="code" href="namespacestd.html">std</a>::forward&lt;T&gt;(value))</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; }</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; result(internal::placeholder, E&amp;&amp; value) : var_err(<a class="code" href="namespacestd.html">std</a>::forward&lt;E&gt;(value))</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;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; result(<span class="keyword">const</span> T&amp; value, internal::placeholder) : var_ok(value)</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="l00060"></a><span class="lineno"> 60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; result(internal::placeholder, <span class="keyword">const</span> E&amp; value) : var_err(value)</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; }</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="comment"> * Create a new ok value.</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;<span class="comment"> * @param T value</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="comment"> * @return result&lt;T, E&gt;</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8"> 71</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a> <a class="code" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">ok</a>(T&amp;&amp; value) noexcept</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; {</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="keywordflow">return</span> std::forward&lt;result&lt;T, E&gt;&gt;(</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a>(std::forward&lt;T&gt;(value), internal::placeholder{}));</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; }</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a> <a class="code" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">ok</a>(<span class="keyword">const</span> T&amp; value) noexcept</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">return</span> std::forward&lt;result&lt;T, E&gt;&gt;(<a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a>(value, internal::placeholder{}));</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; }</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;<span class="comment"> * Create a new err value.</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;<span class="comment"> * @param E value</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="comment"> * @return result&lt;T, E&gt;</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5"> 88</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">err</a>(E&amp;&amp; value) noexcept</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="keywordflow">return</span> std::forward&lt;result&lt;T, E&gt;&gt;(</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a>(internal::placeholder{}, std::forward&lt;E&gt;(value)));</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; }</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">err</a>(<span class="keyword">const</span> E&amp; value) noexcept</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keywordflow">return</span> std::forward&lt;result&lt;T, E&gt;&gt;(<a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a>(internal::placeholder{}, value));</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; }</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;<span class="comment"> * Create a new ok value using `T()` constructor.</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;<span class="comment"> * @return result&lt;T, E&gt;</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#a556c18ac62ab6c7d6a4fa00ce62a74d4"> 104</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a> <a class="code" href="singletonmaybe_1_1result.html#a556c18ac62ab6c7d6a4fa00ce62a74d4">default_ok</a>() noexcept</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keywordflow">return</span> std::move(<a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a>(T(), internal::placeholder{}));</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;<span class="comment"> * Create a new err value using `E()` constructor.</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;<span class="comment"> * @return result&lt;T, E&gt;</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#aa551222749a10e8d69b75a081a59b61f"> 114</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a> <a class="code" href="singletonmaybe_1_1result.html#aa551222749a10e8d69b75a081a59b61f">default_err</a>() noexcept</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; {</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="keywordflow">return</span> std::move(<a class="code" href="singletonmaybe_1_1result.html">result&lt;T, E&gt;</a>(internal::placeholder{}, E()));</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; }</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="comment">// Inspection.</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;<span class="comment"> * Check if result contains ok value.</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;<span class="comment"> * @return bool</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc"> 126</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a>() const noexcept</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; {</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <span class="keywordflow">return</span> !!var_ok;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; }</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;<span class="comment"> * Check if result contains err value.</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"> * @return bool</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3"> 136</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>() const noexcept</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; {</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; <span class="keywordflow">return</span> !!var_err;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; }</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keyword">explicit</span> <span class="keyword">inline</span> <span class="keyword">operator</span> bool() const noexcept</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; {</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a>();</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; }</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; constexpr T <span class="keyword">const</span>&amp; ok_value() const&amp;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; {</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a>()) {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to ok from err&quot;</span>);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; }</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <span class="keywordflow">return</span> *var_ok;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; }</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; constexpr T&amp; ok_value() &amp;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; {</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a>()) {</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to ok from err&quot;</span>);</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; }</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; <span class="keywordflow">return</span> *var_ok;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; }</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; constexpr T&amp;&amp; ok_value() &amp;&amp;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; {</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a>()) {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to ok from err&quot;</span>);</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="keywordflow">return</span> std::move(*var_ok);</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; }</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">class</span> V&gt;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; constexpr T ok_value_or(V&amp;&amp; v) const&amp;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="keywordflow">return</span> var_ok.value_or(std::forward&lt;V&gt;(v));</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">class</span> V&gt;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; constexpr T ok_value_or(V&amp;&amp; v) &amp;&amp;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; <span class="keywordflow">return</span> var_ok.value_or(std::forward&lt;V&gt;(v));</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; }</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; constexpr E <span class="keyword">const</span>&amp; err_value() const&amp;</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="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>()) {</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to err from ok&quot;</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="keywordflow">return</span> *var_err;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; }</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; constexpr E&amp; err_value() &amp;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; {</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>()) {</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to err from ok&quot;</span>);</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; }</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="keywordflow">return</span> *var_err;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; }</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; constexpr E&amp;&amp; err_value() &amp;&amp;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; {</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>()) {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to err from ok&quot;</span>);</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; <span class="keywordflow">return</span> std::move(*var_err);</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">class</span> V&gt;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; constexpr E err_value_or(V&amp;&amp; v) const&amp;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; {</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <span class="keywordflow">return</span> var_err.value_or(std::forward&lt;V&gt;(v));</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; }</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160;</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">class</span> V&gt;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; constexpr E err_value_or(V&amp;&amp; v) &amp;&amp;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; {</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <span class="keywordflow">return</span> var_err.value_or(std::forward&lt;V&gt;(v));</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; }</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="comment">// Functional helpers.</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160;<span class="comment"> * Maps a result&lt;T, E&gt; to result&lt;U, E&gt; (where U is return value of F(T)) by applying a</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160;<span class="comment"> * function F to a</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160;<span class="comment"> * contained ok value, leaving an err value untouched.</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160;<span class="comment"> * This function can be used to compose the results of two functions.</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160;<span class="comment"> * @param f F(T) -&gt; U</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160;<span class="comment"> * @return maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; template &lt;typename F, typename R = typename std::result_of&lt;F(T)&gt;::type&gt;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">map</a>(F f) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;R, E&gt;</a>;</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160;<span class="comment"> * Maps a result&lt;T, E&gt; to result&lt;void, E&gt;, leaving an err value untouched.</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160;<span class="comment"> * @return maybe::result&lt;void, E&gt;</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23">map_void</a>() noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::result&lt;<span class="keywordtype">void</span>, E&gt;;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160;<span class="comment"> * Maps a result&lt;T, E&gt; to result&lt;U, E&gt; by always returning provided U value on success,</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160;<span class="comment"> * leaving an err value untouched.</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160;<span class="comment"> * This function can be used to compose the results of two functions.</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160;<span class="comment"> * @param value U</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160;<span class="comment"> * @return maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; template &lt;typename U&gt;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; inline auto <a class="code" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">map_value</a>(U value) noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::result&lt;U, E&gt;;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160;<span class="comment"> * Maps a result&lt;T, E&gt; to result&lt;T, U&gt; (where U is return value of F(E)) by applying a</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160;<span class="comment"> * function to a</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160;<span class="comment"> * function to a</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160;<span class="comment"> * contained err value, leaving an ok value untouched.</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160;<span class="comment"> * This function can be used to pass through a successful result while changing an error.</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160;<span class="comment"> * @param f F(E) -&gt; U</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160;<span class="comment"> * @return maybe::result&lt;T, U&gt;</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; template &lt;typename F&gt;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; inline auto <a class="code" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">map_err</a>(F f) noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::result&lt;T, typename <a class="code" href="namespacestd.html">std</a>::result_of&lt;F(E)&gt;::type&gt;;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160;<span class="comment"> * Maps a result&lt;T, E&gt; to result&lt;T, U&gt; by always returning provided U value on error,</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160;<span class="comment"> * leaving an ok value untouched.</span></div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160;<span class="comment"> * This function can be used to compose the results of two functions.</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160;<span class="comment"> * @param value U</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160;<span class="comment"> * @return maybe::result&lt;T, U&gt;</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; template &lt;typename U&gt;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; inline auto <a class="code" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">map_err_value</a>(U value) noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::result&lt;T, U&gt;;</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160;<span class="comment"> * Calls op if the result is ok, otherwise returns the err value of self.</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160;<span class="comment"> * This function can be used for control flow based on result values.</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160;<span class="comment"> * @param f F(T) -&gt; maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160;<span class="comment"> * @return maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; template &lt;typename F&gt;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160; inline auto <a class="code" href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">and_then</a>(F op) noexcept -&gt; typename <a class="code" href="namespacestd.html">std</a>::result_of&lt;F(T)&gt;::type;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160;<span class="comment"> * Converts into another result with different ok type `U` and forwards the same error.</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160;<span class="comment"> * The ok type `U` must have `U()` constructor in case the result does not contain an err.</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160;<span class="comment"> * @return maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; template &lt;typename U&gt;</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; inline auto <a class="code" href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">into_err</a>() noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::result&lt;U, E&gt; const;</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; };</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160;</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; template &lt;typename T, typename E&gt;</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; constexpr <span class="keywordtype">bool</span> operator==(const result&lt;T, E&gt;&amp; x, const result&lt;T, E&gt;&amp; y)</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; {</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="keywordflow">return</span> x.is_ok() &amp;&amp; y.is_ok()</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; ? x.ok_value() == y.ok_value()</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; : (x.is_err() &amp;&amp; y.is_err() ? x.err_value() == y.err_value() : <span class="keyword">false</span>);</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; }</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; constexpr <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> result&lt;T, E&gt;&amp; x, <span class="keyword">const</span> result&lt;T, E&gt;&amp; y)</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; {</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; <span class="keywordflow">return</span> !(x == y);</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; }</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160;</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00315"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html"> 315</a></span>&#160; <span class="keyword">class </span><a class="code" href="singletonmaybe_1_1result.html">result</a>&lt;void, E&gt; final {</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; std::experimental::optional&lt;E&gt; var_err;</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160;</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160; <span class="keyword">typedef</span> <span class="keywordtype">void</span> ok_type;</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; <span class="keyword">typedef</span> E err_type;</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result</a>()</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; {</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; }</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result</a>(internal::placeholder, E&amp;&amp; value) : var_err(std::forward&lt;E&gt;(value))</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; {</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; }</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160;</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result</a>(internal::placeholder, <span class="keyword">const</span> E&amp; value) : var_err(value)</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; {</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; }</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160;</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result</a>(E&amp;&amp; value) : var_err(std::forward&lt;E&gt;(value))</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; {</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; }</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160;</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160; <a class="code" href="singletonmaybe_1_1result.html">result</a>(<span class="keyword">const</span> E&amp; value) : var_err(value)</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160; {</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160; }</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>&#160;<span class="comment"> * Create a new ok value.</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160;<span class="comment"> * @param void value</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>&#160;<span class="comment"> * @return result&lt;void, E&gt;</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a144e724691eb07f9f666b5c08d2f06bf"> 349</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a144e724691eb07f9f666b5c08d2f06bf">ok</a>() noexcept</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160; {</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160; <span class="keywordflow">return</span> std::forward&lt;result&lt;void, E&gt;&gt;(<a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a>());</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>&#160; }</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>&#160;<span class="comment"> * Create a new err value.</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>&#160;<span class="comment"> * @param E value</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>&#160;<span class="comment"> * @return result&lt;void, E&gt;</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00360"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a208905425bb1feb2d0932e263766c062"> 360</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a208905425bb1feb2d0932e263766c062">err</a>(E&amp;&amp; value) noexcept</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>&#160; {</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>&#160; <span class="keywordflow">return</span> std::forward&lt;result&lt;void, E&gt;&gt;(<a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a>(std::forward&lt;E&gt;(value)));</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>&#160; }</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>&#160;</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">err</a>(<span class="keyword">const</span> E&amp; value) noexcept</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>&#160; {</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>&#160; <span class="keywordflow">return</span> std::forward&lt;result&lt;void, E&gt;&gt;(<a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a>(value));</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>&#160; }</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>&#160;<span class="comment"> * Create a new ok value using `void()` constructor.</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>&#160;<span class="comment"> * @return result&lt;void, E&gt;</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#af287a4cda77532f1bf8bdc214c065f33"> 375</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#af287a4cda77532f1bf8bdc214c065f33">default_ok</a>() noexcept</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>&#160; {</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>&#160; <span class="keywordflow">return</span> std::move(<a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a>());</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>&#160; }</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>&#160;<span class="comment"> * Create a new err value using `E()` constructor.</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>&#160;<span class="comment"> * @return result&lt;void, E&gt;</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a0e285d612e4a247383c34b49a327b82d"> 385</a></span>&#160; constexpr <span class="keyword">static</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a0e285d612e4a247383c34b49a327b82d">default_err</a>() noexcept</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>&#160; {</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>&#160; <span class="keywordflow">return</span> std::move(<a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a>(E()));</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>&#160; }</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>&#160;</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>&#160; <span class="comment">// Inspection.</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>&#160;<span class="comment"> * Check if result contains ok value.</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>&#160;<span class="comment"> * @return bool</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#afd7ac440b9b5a697188786aeded7595e"> 397</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#afd7ac440b9b5a697188786aeded7595e">is_ok</a>() const noexcept</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>&#160; {</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>&#160; <span class="keywordflow">return</span> !var_err;</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>&#160; }</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>&#160;<span class="comment"> * Check if result contains err value.</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>&#160;<span class="comment"> * @return bool</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ae23f25fa8fe4d75a7f3377a42f2810de"> 407</a></span>&#160; <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ae23f25fa8fe4d75a7f3377a42f2810de">is_err</a>() const noexcept</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>&#160; {</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>&#160; <span class="keywordflow">return</span> !!var_err;</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>&#160; }</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>&#160;</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>&#160; <span class="keyword">explicit</span> <span class="keyword">inline</span> <span class="keyword">operator</span> bool() const noexcept</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>&#160; {</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a>();</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>&#160; }</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>&#160;</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>&#160; <span class="keywordtype">void</span> ok_value()</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>&#160; {</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>()) {</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to get ok from err&quot;</span>);</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>&#160; }</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>&#160; }</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>&#160;</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>&#160; constexpr E <span class="keyword">const</span>&amp; err_value() const&amp;</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>&#160; {</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>()) {</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to err from ok&quot;</span>);</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>&#160; }</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>&#160; <span class="keywordflow">return</span> *var_err;</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>&#160; }</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>&#160;</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>&#160; constexpr E&amp; err_value() &amp;</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>&#160; {</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>()) {</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to err from ok&quot;</span>);</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>&#160; }</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>&#160; <span class="keywordflow">return</span> *var_err;</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>&#160; }</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>&#160;</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>&#160; constexpr E&amp;&amp; err_value() &amp;&amp;</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>&#160; {</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>&#160; <span class="keywordflow">if</span> (!<a class="code" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a>()) {</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> bad_result_access(<span class="stringliteral">&quot;Attempted to err from ok&quot;</span>);</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>&#160; }</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>&#160; <span class="keywordflow">return</span> std::move(*var_err);</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>&#160; }</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>&#160;</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">class</span> V&gt;</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>&#160; constexpr E err_value_or(V&amp;&amp; v) const&amp;</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>&#160; {</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>&#160; <span class="keywordflow">return</span> var_err.value_or(std::forward&lt;V&gt;(v));</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>&#160; }</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>&#160;</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">class</span> V&gt;</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>&#160; constexpr E err_value_or(V&amp;&amp; v) &amp;&amp;</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>&#160; {</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>&#160; <span class="keywordflow">return</span> var_err.value_or(std::forward&lt;V&gt;(v));</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>&#160; }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>&#160;</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>&#160; <span class="comment">// Functional helpers.</span></div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>&#160;<span class="comment"> * Maps a result&lt;void, E&gt; to result&lt;U, E&gt; (where U is return value of F(void)) by applying a</span></div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>&#160;<span class="comment"> * function F to a</span></div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>&#160;<span class="comment"> * contained ok value, leaving an err value untouched.</span></div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>&#160;<span class="comment"> * This function can be used to compose the results of two functions.</span></div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>&#160;<span class="comment"> * @param f F() -&gt; U</span></div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>&#160;<span class="comment"> * @return maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> F&gt;</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">map</a>(F f) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;typename std::result_of&lt;F()&gt;::type</a>, E&gt;;</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>&#160;<span class="comment"> * Maps a result&lt;void, E&gt; to result&lt;U, E&gt; by always returning provided U value on success,</span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>&#160;<span class="comment"> * leaving an err value untouched.</span></div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>&#160;<span class="comment"> * This function can be used to compose the results of two functions.</span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>&#160;<span class="comment"> * @param value U</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>&#160;<span class="comment"> * @return maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">map_value</a>(U value) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;U, E&gt;</a>;</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>&#160;<span class="comment"> * Maps a result&lt;void, E&gt; to result&lt;void, U&gt; (where U is return value of F(E)) by applying a</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>&#160;<span class="comment"> * function to a</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>&#160;<span class="comment"> * function to a</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>&#160;<span class="comment"> * contained err value, leaving an ok value untouched.</span></div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>&#160;<span class="comment"> * This function can be used to pass through a successful result while changing an error.</span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>&#160;<span class="comment"> * @param f F(E) -&gt; U</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>&#160;<span class="comment"> * @return maybe::result&lt;void, U&gt;</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> F&gt;</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">map_err</a>(F f) noexcept</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>&#160; -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;void, typename std::result_of&lt;F(E)&gt;::type</a>&gt;;</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>&#160;<span class="comment"> * Maps a result&lt;void, E&gt; to result&lt;void, U&gt; by always returning provided U value on error,</span></div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>&#160;<span class="comment"> * leaving an ok value untouched.</span></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>&#160;<span class="comment"> * This function can be used to compose the results of two functions.</span></div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>&#160;<span class="comment"> * @param value U</span></div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>&#160;<span class="comment"> * @return maybe::result&lt;void, U&gt;</span></div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">map_err_value</a>(U value) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;void, U&gt;</a>;</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>&#160;<span class="comment"> * Calls op if the result is ok, otherwise returns the err value of self.</span></div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>&#160;<span class="comment"> * This function can be used for control flow based on result values.</span></div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>&#160;<span class="comment"> * @param f F() -&gt; maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>&#160;<span class="comment"> * @return maybe::result&lt;U, E&gt;</span></div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> F&gt;</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">and_then</a>(F op) noexcept -&gt; <span class="keyword">typename</span> std::result_of&lt;F()&gt;::type;</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>&#160;<span class="comment"> /**</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>&#160;<span class="comment"> * Converts into another result with ok type void and forwards the same error.</span></div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>&#160;<span class="comment"> * @return maybe::result&lt;void, E&gt;</span></div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>&#160; <span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">into_err</a>() noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::result&lt;<span class="keywordtype">void</span>, E&gt;;</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>&#160; };</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>&#160;</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>&#160; template &lt;typename E&gt;</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>&#160; constexpr <span class="keywordtype">bool</span> operator==(const result&lt;<span class="keywordtype">void</span>, E&gt;&amp; x, const result&lt;<span class="keywordtype">void</span>, E&gt;&amp; y)</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>&#160; {</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>&#160; <span class="keywordflow">return</span> x.<a class="code" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a>() &amp;&amp; y.is_ok()</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>&#160; ? <span class="keyword">true</span></div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>&#160; : (x.is_err() &amp;&amp; y.is_err() ? x.err_value() == y.err_value() : <span class="keyword">false</span>);</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>&#160; }</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>&#160;</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>&#160; constexpr <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> result&lt;void, E&gt;&amp; x, <span class="keyword">const</span> result&lt;void, E&gt;&amp; y)</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>&#160; {</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>&#160; <span class="keywordflow">return</span> !(x == y);</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>&#160; }</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>&#160;}</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>&#160;</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>&#160;<span class="preprocessor">#include &quot;result.inline.hpp&quot;</span></div>
<div class="ttc" id="singletonmaybe_1_1result_html_ad2636eea16dcd35325491d10322da424"><div class="ttname"><a href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">maybe::result::and_then</a></div><div class="ttdeci">auto and_then(F op) noexcept-&gt; typename std::result_of&lt; F(T)&gt;::type</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00073">result.inline.hpp:73</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_afb2aeb0c86980526244580d99cc49d23"><div class="ttname"><a href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23">maybe::result::map_void</a></div><div class="ttdeci">auto map_void() noexcept-&gt; maybe::result&lt; void, E &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00027">result.inline.hpp:27</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a5db8102c6d5edb9ac3cebcbdc3d72ffc"><div class="ttname"><a href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">maybe::result::is_ok</a></div><div class="ttdeci">bool is_ok() const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00126">result.hpp:126</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html_ae23f25fa8fe4d75a7f3377a42f2810de"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ae23f25fa8fe4d75a7f3377a42f2810de">maybe::result&lt; void, E &gt;::is_err</a></div><div class="ttdeci">bool is_err() const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00407">result.hpp:407</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_aaa95fac11ad98969ca145c5c31f5cb0e"><div class="ttname"><a href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">maybe::result::map_err_value</a></div><div class="ttdeci">auto map_err_value(U value) noexcept-&gt; maybe::result&lt; T, U &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00062">result.inline.hpp:62</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_aea39cbbd5a4e0382f150be760dafe7f8"><div class="ttname"><a href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">maybe::result::ok</a></div><div class="ttdeci">static constexpr result&lt; T, E &gt; ok(T &amp;&amp;value) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00071">result.hpp:71</a></div></div>
<div class="ttc" id="namespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div><div class="ttdoc">STL namespace. </div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a556c18ac62ab6c7d6a4fa00ce62a74d4"><div class="ttname"><a href="singletonmaybe_1_1result.html#a556c18ac62ab6c7d6a4fa00ce62a74d4">maybe::result::default_ok</a></div><div class="ttdeci">static constexpr result&lt; T, E &gt; default_ok() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00104">result.hpp:104</a></div></div>
<div class="ttc" id="namespacemaybe_html"><div class="ttname"><a href="namespacemaybe.html">maybe</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8fwd_8hpp_source.html#l00013">result.fwd.hpp:13</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_aa551222749a10e8d69b75a081a59b61f"><div class="ttname"><a href="singletonmaybe_1_1result.html#aa551222749a10e8d69b75a081a59b61f">maybe::result::default_err</a></div><div class="ttdeci">static constexpr result&lt; T, E &gt; default_err() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00114">result.hpp:114</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_af1e9190e3160eb5549994f16b59b8e01"><div class="ttname"><a href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">maybe::result::into_err</a></div><div class="ttdeci">auto into_err() noexcept-&gt; maybe::result&lt; U, E &gt; const</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00085">result.inline.hpp:85</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_af44cde583906955e7270347c76ea82ea"><div class="ttname"><a href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">maybe::result::map_err</a></div><div class="ttdeci">auto map_err(F f) noexcept-&gt; maybe::result&lt; T, typename std::result_of&lt; F(E)&gt;::type &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00049">result.inline.hpp:49</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a23e5271cb5d003afbb01d99f511f62b5"><div class="ttname"><a href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result::err</a></div><div class="ttdeci">static constexpr result&lt; T, E &gt; err(E &amp;&amp;value) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00088">result.hpp:88</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html_a144e724691eb07f9f666b5c08d2f06bf"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a144e724691eb07f9f666b5c08d2f06bf">maybe::result&lt; void, E &gt;::ok</a></div><div class="ttdeci">static constexpr result&lt; void, E &gt; ok() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00349">result.hpp:349</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html_a208905425bb1feb2d0932e263766c062"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a208905425bb1feb2d0932e263766c062">maybe::result&lt; void, E &gt;::err</a></div><div class="ttdeci">static constexpr result&lt; void, E &gt; err(E &amp;&amp;value) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00360">result.hpp:360</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a96f0e07fda6438e8b2d87f5d7d183a15"><div class="ttname"><a href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">maybe::result::map</a></div><div class="ttdeci">auto map(F f) noexcept-&gt; maybe::result&lt; R, E &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00017">result.inline.hpp:17</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_abbd6fd8e97ea6cba418dbd2ec20fb5b3"><div class="ttname"><a href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">maybe::result::is_err</a></div><div class="ttdeci">bool is_err() const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00136">result.hpp:136</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html_afd7ac440b9b5a697188786aeded7595e"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#afd7ac440b9b5a697188786aeded7595e">maybe::result&lt; void, E &gt;::is_ok</a></div><div class="ttdeci">bool is_ok() const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00397">result.hpp:397</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00315">result.hpp:315</a></div></div>
<div class="ttc" id="classmaybe_1_1bad__result__access_html"><div class="ttname"><a href="classmaybe_1_1bad__result__access.html">maybe::bad_result_access</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00024">result.hpp:24</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a30c70c4e37345b4be7877bb18c8ef176"><div class="ttname"><a href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">maybe::result::map_value</a></div><div class="ttdeci">auto map_value(U value) noexcept-&gt; maybe::result&lt; U, E &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00038">result.inline.hpp:38</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html"><div class="ttname"><a href="singletonmaybe_1_1result.html">maybe::result</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8fwd_8hpp_source.html#l00015">result.fwd.hpp:15</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html_af287a4cda77532f1bf8bdc214c065f33"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#af287a4cda77532f1bf8bdc214c065f33">maybe::result&lt; void, E &gt;::default_ok</a></div><div class="ttdeci">static constexpr result&lt; void, E &gt; default_ok() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00375">result.hpp:375</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html_a0e285d612e4a247383c34b49a327b82d"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a0e285d612e4a247383c34b49a327b82d">maybe::result&lt; void, E &gt;::default_err</a></div><div class="ttdeci">static constexpr result&lt; void, E &gt; default_err() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00385">result.hpp:385</a></div></div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Copyright 2016 TRAFI</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0, &lt;LICENSE-APACHE or</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * http://apache.org/licenses/LICENSE-2.0&gt; or the MIT license &lt;LICENSE-MIT or</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * http://opensource.org/licenses/MIT&gt;, at your option. This file may not be</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * copied, modified, or distributed except according to those terms.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#pragma once</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">#include &quot;result.hpp&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> F, <span class="keyword">typename</span> R&gt;</div>
<div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15"> 17</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">maybe::result&lt;T, E&gt;::map</a>(F f) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;R, E&gt;</a></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;{</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; <span class="keywordflow">if</span> (is_err()) {</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt;R, E&gt;::err</a>(std::forward&lt;E&gt;(err_value()));</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; }</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="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;R, E&gt;</a>(f(ok_value()), internal::placeholder{});</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;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23"> 27</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23">maybe::result&lt;T, E&gt;::map_void</a>() noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::<a class="code" href="singletonmaybe_1_1result.html">result</a>&lt;<span class="keywordtype">void</span>, E&gt;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;{</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keywordflow">if</span> (is_err()) {</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt;void, E&gt;::err</a>(std::forward&lt;E&gt;(err_value()));</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; }</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt;void, E&gt;</a>();</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;};</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="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176"> 38</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">maybe::result&lt;T, E&gt;::map_value</a>(U value) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;U, E&gt;</a></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="keywordflow">if</span> (is_err()) {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt;U, E&gt;::err</a>(std::forward&lt;E&gt;(err_value()));</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;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;U, E&gt;</a>(std::forward&lt;U&gt;(value), internal::placeholder{});</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;};</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> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> F&gt;</div>
<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea"> 49</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">maybe::result&lt;T, E&gt;::map_err</a>(F f) noexcept</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;T, typename std::result_of&lt;F(E)&gt;::type</a>&gt;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;{</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keyword">typedef</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;T, typename std::result_of&lt;F(E)&gt;::type</a>&gt; return_result_t;</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; <span class="keywordflow">if</span> (is_ok()) {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keywordflow">return</span> return_result_t(std::forward&lt;T&gt;(ok_value()), internal::placeholder{});</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; }</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordflow">return</span> return_result_t(internal::placeholder{}, f(err_value()));</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="l00060"></a><span class="lineno"> 60</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e"> 62</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">maybe::result&lt;T, E&gt;::map_err_value</a>(U value) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;T, U&gt;</a></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;{</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordflow">if</span> (is_ok()) {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;T, U&gt;</a>(std::forward&lt;T&gt;(ok_value()), internal::placeholder{});</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt;T, U&gt;::err</a>(std::forward&lt;U&gt;(value));</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;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</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> F&gt;</div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424"> 73</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">maybe::result&lt;T, E&gt;::and_then</a>(F f) noexcept -&gt; <span class="keyword">typename</span> std::result_of&lt;F(T)&gt;::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="keyword">typedef</span> <span class="keyword">typename</span> std::result_of&lt;F(T)&gt;::type result_t;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keywordflow">if</span> (is_err()) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt;typename result_t::ok_type, E&gt;::err</a>(std::forward&lt;E&gt;(err_value()));</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; }</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordflow">return</span> f(ok_value());</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;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01"> 85</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">maybe::result&lt;T, E&gt;::into_err</a>() noexcept -&gt; <a class="code" href="namespacemaybe.html">maybe</a>::<a class="code" href="singletonmaybe_1_1result.html">result</a>&lt;U, E&gt;<span class="keyword"> const</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keywordflow">if</span> (is_err()) {</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;U, E&gt;</a>(internal::placeholder{}, std::forward&lt;E&gt;(err_value()));</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a556c18ac62ab6c7d6a4fa00ce62a74d4">maybe::result&lt;U, E&gt;::default_ok</a>();</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="l00093"></a><span class="lineno"> 93</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> F&gt;</div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#ac52afdff126d184422c82793c067525c"> 95</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">maybe::result&lt;void, E&gt;::map</a>(F f) noexcept</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;typename std::result_of&lt;F()&gt;::type</a>, E&gt;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;{</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keyword">typedef</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;typename std::result_of&lt;F()&gt;::type</a>, E&gt; return_result_t;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keywordflow">if</span> (is_err()) {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keywordflow">return</span> return_result_t::err(std::forward&lt;E&gt;(err_value()));</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="keywordflow">return</span> return_result_t(f(), internal::placeholder{});</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;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3d9c188e3a57bbb7f2fd2f97c70a02c0"> 108</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">maybe::result&lt;void, E&gt;::map_value</a>(U value) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;U, E&gt;</a></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;{</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordflow">if</span> (is_err()) {</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt;U, E&gt;::err</a>(std::forward&lt;E&gt;(err_value()));</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; }</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;U, E&gt;</a>(std::forward&lt;U&gt;(value), internal::placeholder{});</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;};</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> F&gt;</div>
<div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a71d41f929546de3f92beac47ec14d499"> 119</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">maybe::result&lt;void, E&gt;::map_err</a>(F f) noexcept</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;void, typename std::result_of&lt;F(E)&gt;::type</a>&gt;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;{</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; <span class="keyword">typedef</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;void, typename std::result_of&lt;F(E)&gt;::type</a>&gt; return_result_t;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordflow">if</span> (is_ok()) {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; <span class="keywordflow">return</span> return_result_t::ok();</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordflow">return</span> return_result_t(internal::placeholder{}, f(err_value()));</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;};</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> E&gt;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html#a3f0f046607805505ac24262af20b3a9d"> 132</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code" href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">maybe::result&lt;void, E&gt;::map_err_value</a>(U value) noexcept -&gt; <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;void, U&gt;</a></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;{</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordflow">if</span> (is_ok()) {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">maybe::result&lt;void, U&gt;::ok</a>();</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; }</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html">maybe::result&lt;void, U&gt;</a>(std::forward&lt;U&gt;(value));</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;};</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; <span class="keywordflow">return</span> <a class="code" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result&lt;typename result_t::ok_type, E&gt;::err</a>(std::forward&lt;E&gt;(err_value()));</div>
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<div class="ttc" id="singletonmaybe_1_1result_html_ad2636eea16dcd35325491d10322da424"><div class="ttname"><a href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">maybe::result::and_then</a></div><div class="ttdeci">auto and_then(F op) noexcept-&gt; typename std::result_of&lt; F(T)&gt;::type</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00073">result.inline.hpp:73</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_afb2aeb0c86980526244580d99cc49d23"><div class="ttname"><a href="singletonmaybe_1_1result.html#afb2aeb0c86980526244580d99cc49d23">maybe::result::map_void</a></div><div class="ttdeci">auto map_void() noexcept-&gt; maybe::result&lt; void, E &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00027">result.inline.hpp:27</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_aaa95fac11ad98969ca145c5c31f5cb0e"><div class="ttname"><a href="singletonmaybe_1_1result.html#aaa95fac11ad98969ca145c5c31f5cb0e">maybe::result::map_err_value</a></div><div class="ttdeci">auto map_err_value(U value) noexcept-&gt; maybe::result&lt; T, U &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00062">result.inline.hpp:62</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_aea39cbbd5a4e0382f150be760dafe7f8"><div class="ttname"><a href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">maybe::result::ok</a></div><div class="ttdeci">static constexpr result&lt; T, E &gt; ok(T &amp;&amp;value) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00071">result.hpp:71</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a556c18ac62ab6c7d6a4fa00ce62a74d4"><div class="ttname"><a href="singletonmaybe_1_1result.html#a556c18ac62ab6c7d6a4fa00ce62a74d4">maybe::result::default_ok</a></div><div class="ttdeci">static constexpr result&lt; T, E &gt; default_ok() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00104">result.hpp:104</a></div></div>
<div class="ttc" id="namespacemaybe_html"><div class="ttname"><a href="namespacemaybe.html">maybe</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8fwd_8hpp_source.html#l00013">result.fwd.hpp:13</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_af1e9190e3160eb5549994f16b59b8e01"><div class="ttname"><a href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">maybe::result::into_err</a></div><div class="ttdeci">auto into_err() noexcept-&gt; maybe::result&lt; U, E &gt; const</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00085">result.inline.hpp:85</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_af44cde583906955e7270347c76ea82ea"><div class="ttname"><a href="singletonmaybe_1_1result.html#af44cde583906955e7270347c76ea82ea">maybe::result::map_err</a></div><div class="ttdeci">auto map_err(F f) noexcept-&gt; maybe::result&lt; T, typename std::result_of&lt; F(E)&gt;::type &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00049">result.inline.hpp:49</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a23e5271cb5d003afbb01d99f511f62b5"><div class="ttname"><a href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">maybe::result::err</a></div><div class="ttdeci">static constexpr result&lt; T, E &gt; err(E &amp;&amp;value) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00088">result.hpp:88</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a96f0e07fda6438e8b2d87f5d7d183a15"><div class="ttname"><a href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">maybe::result::map</a></div><div class="ttdeci">auto map(F f) noexcept-&gt; maybe::result&lt; R, E &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00017">result.inline.hpp:17</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_abbd6fd8e97ea6cba418dbd2ec20fb5b3"><div class="ttname"><a href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">maybe::result::is_err</a></div><div class="ttdeci">bool is_err() const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00136">result.hpp:136</a></div></div>
<div class="ttc" id="classmaybe_1_1result_3_01void_00_01_e_01_4_html"><div class="ttname"><a href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt; void, E &gt;</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8hpp_source.html#l00315">result.hpp:315</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html_a30c70c4e37345b4be7877bb18c8ef176"><div class="ttname"><a href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">maybe::result::map_value</a></div><div class="ttdeci">auto map_value(U value) noexcept-&gt; maybe::result&lt; U, E &gt;</div><div class="ttdef"><b>Definition:</b> <a href="result_8inline_8hpp_source.html#l00038">result.inline.hpp:38</a></div></div>
<div class="ttc" id="singletonmaybe_1_1result_html"><div class="ttname"><a href="singletonmaybe_1_1result.html">maybe::result</a></div><div class="ttdef"><b>Definition:</b> <a href="result_8fwd_8hpp_source.html#l00015">result.fwd.hpp:15</a></div></div>
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var indexSectionsWithContent =
{
0: "abdeimor",
1: "br",
2: "adeimo"
};
var indexSectionNames =
{
0: "all",
1: "classes",
2: "functions"
};
function convertToId(search)
{
var result = '';
for (i=0;i<search.length;i++)
{
var c = search.charAt(i);
var cn = c.charCodeAt(0);
if (c.match(/[a-z0-9\u0080-\uFFFF]/))
{
result+=c;
}
else if (cn<16)
{
result+="_0"+cn.toString(16);
}
else
{
result+="_"+cn.toString(16);
}
}
return result;
}
function getXPos(item)
{
var x = 0;
if (item.offsetWidth)
{
while (item && item!=document.body)
{
x += item.offsetLeft;
item = item.offsetParent;
}
}
return x;
}
function getYPos(item)
{
var y = 0;
if (item.offsetWidth)
{
while (item && item!=document.body)
{
y += item.offsetTop;
item = item.offsetParent;
}
}
return y;
}
/* A class handling everything associated with the search panel.
Parameters:
name - The name of the global variable that will be
storing this instance. Is needed to be able to set timeouts.
resultPath - path to use for external files
*/
function SearchBox(name, resultsPath, inFrame, label)
{
if (!name || !resultsPath) { alert("Missing parameters to SearchBox."); }
// ---------- Instance variables
this.name = name;
this.resultsPath = resultsPath;
this.keyTimeout = 0;
this.keyTimeoutLength = 500;
this.closeSelectionTimeout = 300;
this.lastSearchValue = "";
this.lastResultsPage = "";
this.hideTimeout = 0;
this.searchIndex = 0;
this.searchActive = false;
this.insideFrame = inFrame;
this.searchLabel = label;
// ----------- DOM Elements
this.DOMSearchField = function()
{ return document.getElementById("MSearchField"); }
this.DOMSearchSelect = function()
{ return document.getElementById("MSearchSelect"); }
this.DOMSearchSelectWindow = function()
{ return document.getElementById("MSearchSelectWindow"); }
this.DOMPopupSearchResults = function()
{ return document.getElementById("MSearchResults"); }
this.DOMPopupSearchResultsWindow = function()
{ return document.getElementById("MSearchResultsWindow"); }
this.DOMSearchClose = function()
{ return document.getElementById("MSearchClose"); }
this.DOMSearchBox = function()
{ return document.getElementById("MSearchBox"); }
// ------------ Event Handlers
// Called when focus is added or removed from the search field.
this.OnSearchFieldFocus = function(isActive)
{
this.Activate(isActive);
}
this.OnSearchSelectShow = function()
{
var searchSelectWindow = this.DOMSearchSelectWindow();
var searchField = this.DOMSearchSelect();
if (this.insideFrame)
{
var left = getXPos(searchField);
var top = getYPos(searchField);
left += searchField.offsetWidth + 6;
top += searchField.offsetHeight;
// show search selection popup
searchSelectWindow.style.display='block';
left -= searchSelectWindow.offsetWidth;
searchSelectWindow.style.left = left + 'px';
searchSelectWindow.style.top = top + 'px';
}
else
{
var left = getXPos(searchField);
var top = getYPos(searchField);
top += searchField.offsetHeight;
// show search selection popup
searchSelectWindow.style.display='block';
searchSelectWindow.style.left = left + 'px';
searchSelectWindow.style.top = top + 'px';
}
// stop selection hide timer
if (this.hideTimeout)
{
clearTimeout(this.hideTimeout);
this.hideTimeout=0;
}
return false; // to avoid "image drag" default event
}
this.OnSearchSelectHide = function()
{
this.hideTimeout = setTimeout(this.name +".CloseSelectionWindow()",
this.closeSelectionTimeout);
}
// Called when the content of the search field is changed.
this.OnSearchFieldChange = function(evt)
{
if (this.keyTimeout) // kill running timer
{
clearTimeout(this.keyTimeout);
this.keyTimeout = 0;
}
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==40 || e.keyCode==13)
{
if (e.shiftKey==1)
{
this.OnSearchSelectShow();
var win=this.DOMSearchSelectWindow();
for (i=0;i<win.childNodes.length;i++)
{
var child = win.childNodes[i]; // get span within a
if (child.className=='SelectItem')
{
child.focus();
return;
}
}
return;
}
else if (window.frames.MSearchResults.searchResults)
{
var elem = window.frames.MSearchResults.searchResults.NavNext(0);
if (elem) elem.focus();
}
}
else if (e.keyCode==27) // Escape out of the search field
{
this.DOMSearchField().blur();
this.DOMPopupSearchResultsWindow().style.display = 'none';
this.DOMSearchClose().style.display = 'none';
this.lastSearchValue = '';
this.Activate(false);
return;
}
// strip whitespaces
var searchValue = this.DOMSearchField().value.replace(/ +/g, "");
if (searchValue != this.lastSearchValue) // search value has changed
{
if (searchValue != "") // non-empty search
{
// set timer for search update
this.keyTimeout = setTimeout(this.name + '.Search()',
this.keyTimeoutLength);
}
else // empty search field
{
this.DOMPopupSearchResultsWindow().style.display = 'none';
this.DOMSearchClose().style.display = 'none';
this.lastSearchValue = '';
}
}
}
this.SelectItemCount = function(id)
{
var count=0;
var win=this.DOMSearchSelectWindow();
for (i=0;i<win.childNodes.length;i++)
{
var child = win.childNodes[i]; // get span within a
if (child.className=='SelectItem')
{
count++;
}
}
return count;
}
this.SelectItemSet = function(id)
{
var i,j=0;
var win=this.DOMSearchSelectWindow();
for (i=0;i<win.childNodes.length;i++)
{
var child = win.childNodes[i]; // get span within a
if (child.className=='SelectItem')
{
var node = child.firstChild;
if (j==id)
{
node.innerHTML='&#8226;';
}
else
{
node.innerHTML='&#160;';
}
j++;
}
}
}
// Called when an search filter selection is made.
// set item with index id as the active item
this.OnSelectItem = function(id)
{
this.searchIndex = id;
this.SelectItemSet(id);
var searchValue = this.DOMSearchField().value.replace(/ +/g, "");
if (searchValue!="" && this.searchActive) // something was found -> do a search
{
this.Search();
}
}
this.OnSearchSelectKey = function(evt)
{
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==40 && this.searchIndex<this.SelectItemCount()) // Down
{
this.searchIndex++;
this.OnSelectItem(this.searchIndex);
}
else if (e.keyCode==38 && this.searchIndex>0) // Up
{
this.searchIndex--;
this.OnSelectItem(this.searchIndex);
}
else if (e.keyCode==13 || e.keyCode==27)
{
this.OnSelectItem(this.searchIndex);
this.CloseSelectionWindow();
this.DOMSearchField().focus();
}
return false;
}
// --------- Actions
// Closes the results window.
this.CloseResultsWindow = function()
{
this.DOMPopupSearchResultsWindow().style.display = 'none';
this.DOMSearchClose().style.display = 'none';
this.Activate(false);
}
this.CloseSelectionWindow = function()
{
this.DOMSearchSelectWindow().style.display = 'none';
}
// Performs a search.
this.Search = function()
{
this.keyTimeout = 0;
// strip leading whitespace
var searchValue = this.DOMSearchField().value.replace(/^ +/, "");
var code = searchValue.toLowerCase().charCodeAt(0);
var idxChar = searchValue.substr(0, 1).toLowerCase();
if ( 0xD800 <= code && code <= 0xDBFF && searchValue > 1) // surrogate pair
{
idxChar = searchValue.substr(0, 2);
}
var resultsPage;
var resultsPageWithSearch;
var hasResultsPage;
var idx = indexSectionsWithContent[this.searchIndex].indexOf(idxChar);
if (idx!=-1)
{
var hexCode=idx.toString(16);
resultsPage = this.resultsPath + '/' + indexSectionNames[this.searchIndex] + '_' + hexCode + '.html';
resultsPageWithSearch = resultsPage+'?'+escape(searchValue);
hasResultsPage = true;
}
else // nothing available for this search term
{
resultsPage = this.resultsPath + '/nomatches.html';
resultsPageWithSearch = resultsPage;
hasResultsPage = false;
}
window.frames.MSearchResults.location = resultsPageWithSearch;
var domPopupSearchResultsWindow = this.DOMPopupSearchResultsWindow();
if (domPopupSearchResultsWindow.style.display!='block')
{
var domSearchBox = this.DOMSearchBox();
this.DOMSearchClose().style.display = 'inline';
if (this.insideFrame)
{
var domPopupSearchResults = this.DOMPopupSearchResults();
domPopupSearchResultsWindow.style.position = 'relative';
domPopupSearchResultsWindow.style.display = 'block';
var width = document.body.clientWidth - 8; // the -8 is for IE :-(
domPopupSearchResultsWindow.style.width = width + 'px';
domPopupSearchResults.style.width = width + 'px';
}
else
{
var domPopupSearchResults = this.DOMPopupSearchResults();
var left = getXPos(domSearchBox) + 150; // domSearchBox.offsetWidth;
var top = getYPos(domSearchBox) + 20; // domSearchBox.offsetHeight + 1;
domPopupSearchResultsWindow.style.display = 'block';
left -= domPopupSearchResults.offsetWidth;
domPopupSearchResultsWindow.style.top = top + 'px';
domPopupSearchResultsWindow.style.left = left + 'px';
}
}
this.lastSearchValue = searchValue;
this.lastResultsPage = resultsPage;
}
// -------- Activation Functions
// Activates or deactivates the search panel, resetting things to
// their default values if necessary.
this.Activate = function(isActive)
{
if (isActive || // open it
this.DOMPopupSearchResultsWindow().style.display == 'block'
)
{
this.DOMSearchBox().className = 'MSearchBoxActive';
var searchField = this.DOMSearchField();
if (searchField.value == this.searchLabel) // clear "Search" term upon entry
{
searchField.value = '';
this.searchActive = true;
}
}
else if (!isActive) // directly remove the panel
{
this.DOMSearchBox().className = 'MSearchBoxInactive';
this.DOMSearchField().value = this.searchLabel;
this.searchActive = false;
this.lastSearchValue = ''
this.lastResultsPage = '';
}
}
}
// -----------------------------------------------------------------------
// The class that handles everything on the search results page.
function SearchResults(name)
{
// The number of matches from the last run of <Search()>.
this.lastMatchCount = 0;
this.lastKey = 0;
this.repeatOn = false;
// Toggles the visibility of the passed element ID.
this.FindChildElement = function(id)
{
var parentElement = document.getElementById(id);
var element = parentElement.firstChild;
while (element && element!=parentElement)
{
if (element.nodeName == 'DIV' && element.className == 'SRChildren')
{
return element;
}
if (element.nodeName == 'DIV' && element.hasChildNodes())
{
element = element.firstChild;
}
else if (element.nextSibling)
{
element = element.nextSibling;
}
else
{
do
{
element = element.parentNode;
}
while (element && element!=parentElement && !element.nextSibling);
if (element && element!=parentElement)
{
element = element.nextSibling;
}
}
}
}
this.Toggle = function(id)
{
var element = this.FindChildElement(id);
if (element)
{
if (element.style.display == 'block')
{
element.style.display = 'none';
}
else
{
element.style.display = 'block';
}
}
}
// Searches for the passed string. If there is no parameter,
// it takes it from the URL query.
//
// Always returns true, since other documents may try to call it
// and that may or may not be possible.
this.Search = function(search)
{
if (!search) // get search word from URL
{
search = window.location.search;
search = search.substring(1); // Remove the leading '?'
search = unescape(search);
}
search = search.replace(/^ +/, ""); // strip leading spaces
search = search.replace(/ +$/, ""); // strip trailing spaces
search = search.toLowerCase();
search = convertToId(search);
var resultRows = document.getElementsByTagName("div");
var matches = 0;
var i = 0;
while (i < resultRows.length)
{
var row = resultRows.item(i);
if (row.className == "SRResult")
{
var rowMatchName = row.id.toLowerCase();
rowMatchName = rowMatchName.replace(/^sr\d*_/, ''); // strip 'sr123_'
if (search.length<=rowMatchName.length &&
rowMatchName.substr(0, search.length)==search)
{
row.style.display = 'block';
matches++;
}
else
{
row.style.display = 'none';
}
}
i++;
}
document.getElementById("Searching").style.display='none';
if (matches == 0) // no results
{
document.getElementById("NoMatches").style.display='block';
}
else // at least one result
{
document.getElementById("NoMatches").style.display='none';
}
this.lastMatchCount = matches;
return true;
}
// return the first item with index index or higher that is visible
this.NavNext = function(index)
{
var focusItem;
while (1)
{
var focusName = 'Item'+index;
focusItem = document.getElementById(focusName);
if (focusItem && focusItem.parentNode.parentNode.style.display=='block')
{
break;
}
else if (!focusItem) // last element
{
break;
}
focusItem=null;
index++;
}
return focusItem;
}
this.NavPrev = function(index)
{
var focusItem;
while (1)
{
var focusName = 'Item'+index;
focusItem = document.getElementById(focusName);
if (focusItem && focusItem.parentNode.parentNode.style.display=='block')
{
break;
}
else if (!focusItem) // last element
{
break;
}
focusItem=null;
index--;
}
return focusItem;
}
this.ProcessKeys = function(e)
{
if (e.type == "keydown")
{
this.repeatOn = false;
this.lastKey = e.keyCode;
}
else if (e.type == "keypress")
{
if (!this.repeatOn)
{
if (this.lastKey) this.repeatOn = true;
return false; // ignore first keypress after keydown
}
}
else if (e.type == "keyup")
{
this.lastKey = 0;
this.repeatOn = false;
}
return this.lastKey!=0;
}
this.Nav = function(evt,itemIndex)
{
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==13) return true;
if (!this.ProcessKeys(e)) return false;
if (this.lastKey==38) // Up
{
var newIndex = itemIndex-1;
var focusItem = this.NavPrev(newIndex);
if (focusItem)
{
var child = this.FindChildElement(focusItem.parentNode.parentNode.id);
if (child && child.style.display == 'block') // children visible
{
var n=0;
var tmpElem;
while (1) // search for last child
{
tmpElem = document.getElementById('Item'+newIndex+'_c'+n);
if (tmpElem)
{
focusItem = tmpElem;
}
else // found it!
{
break;
}
n++;
}
}
}
if (focusItem)
{
focusItem.focus();
}
else // return focus to search field
{
parent.document.getElementById("MSearchField").focus();
}
}
else if (this.lastKey==40) // Down
{
var newIndex = itemIndex+1;
var focusItem;
var item = document.getElementById('Item'+itemIndex);
var elem = this.FindChildElement(item.parentNode.parentNode.id);
if (elem && elem.style.display == 'block') // children visible
{
focusItem = document.getElementById('Item'+itemIndex+'_c0');
}
if (!focusItem) focusItem = this.NavNext(newIndex);
if (focusItem) focusItem.focus();
}
else if (this.lastKey==39) // Right
{
var item = document.getElementById('Item'+itemIndex);
var elem = this.FindChildElement(item.parentNode.parentNode.id);
if (elem) elem.style.display = 'block';
}
else if (this.lastKey==37) // Left
{
var item = document.getElementById('Item'+itemIndex);
var elem = this.FindChildElement(item.parentNode.parentNode.id);
if (elem) elem.style.display = 'none';
}
else if (this.lastKey==27) // Escape
{
parent.searchBox.CloseResultsWindow();
parent.document.getElementById("MSearchField").focus();
}
else if (this.lastKey==13) // Enter
{
return true;
}
return false;
}
this.NavChild = function(evt,itemIndex,childIndex)
{
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==13) return true;
if (!this.ProcessKeys(e)) return false;
if (this.lastKey==38) // Up
{
if (childIndex>0)
{
var newIndex = childIndex-1;
document.getElementById('Item'+itemIndex+'_c'+newIndex).focus();
}
else // already at first child, jump to parent
{
document.getElementById('Item'+itemIndex).focus();
}
}
else if (this.lastKey==40) // Down
{
var newIndex = childIndex+1;
var elem = document.getElementById('Item'+itemIndex+'_c'+newIndex);
if (!elem) // last child, jump to parent next parent
{
elem = this.NavNext(itemIndex+1);
}
if (elem)
{
elem.focus();
}
}
else if (this.lastKey==27) // Escape
{
parent.searchBox.CloseResultsWindow();
parent.document.getElementById("MSearchField").focus();
}
else if (this.lastKey==13) // Enter
{
return true;
}
return false;
}
}
function setKeyActions(elem,action)
{
elem.setAttribute('onkeydown',action);
elem.setAttribute('onkeypress',action);
elem.setAttribute('onkeyup',action);
}
function setClassAttr(elem,attr)
{
elem.setAttribute('class',attr);
elem.setAttribute('className',attr);
}
function createResults()
{
var results = document.getElementById("SRResults");
for (var e=0; e<searchData.length; e++)
{
var id = searchData[e][0];
var srResult = document.createElement('div');
srResult.setAttribute('id','SR_'+id);
setClassAttr(srResult,'SRResult');
var srEntry = document.createElement('div');
setClassAttr(srEntry,'SREntry');
var srLink = document.createElement('a');
srLink.setAttribute('id','Item'+e);
setKeyActions(srLink,'return searchResults.Nav(event,'+e+')');
setClassAttr(srLink,'SRSymbol');
srLink.innerHTML = searchData[e][1][0];
srEntry.appendChild(srLink);
if (searchData[e][1].length==2) // single result
{
srLink.setAttribute('href',searchData[e][1][1][0]);
if (searchData[e][1][1][1])
{
srLink.setAttribute('target','_parent');
}
var srScope = document.createElement('span');
setClassAttr(srScope,'SRScope');
srScope.innerHTML = searchData[e][1][1][2];
srEntry.appendChild(srScope);
}
else // multiple results
{
srLink.setAttribute('href','javascript:searchResults.Toggle("SR_'+id+'")');
var srChildren = document.createElement('div');
setClassAttr(srChildren,'SRChildren');
for (var c=0; c<searchData[e][1].length-1; c++)
{
var srChild = document.createElement('a');
srChild.setAttribute('id','Item'+e+'_c'+c);
setKeyActions(srChild,'return searchResults.NavChild(event,'+e+','+c+')');
setClassAttr(srChild,'SRScope');
srChild.setAttribute('href',searchData[e][1][c+1][0]);
if (searchData[e][1][c+1][1])
{
srChild.setAttribute('target','_parent');
}
srChild.innerHTML = searchData[e][1][c+1][2];
srChildren.appendChild(srChild);
}
srEntry.appendChild(srChildren);
}
srResult.appendChild(srEntry);
results.appendChild(srResult);
}
}

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<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.8"/>
<title>Maybe Result: maybe::result&lt; T, E &gt; Class Template Reference</title>
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<script type="text/javascript" src="dynsections.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
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<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">Maybe Result
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</tr>
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<img id="MSearchSelect" src="search/mag_sel.png"
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<input type="text" id="MSearchField" value="Search" accesskey="S"
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<li><a href="classes.html"><span>Class&#160;Index</span></a></li>
<li><a href="hierarchy.html"><span>Class&#160;Hierarchy</span></a></li>
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<div id="MSearchSelectWindow"
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<div class="header">
<div class="summary">
<a href="#pub-types">Public Types</a> &#124;
<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="#pub-static-methods">Static Public Member Functions</a> &#124;
<a href="classmaybe_1_1result-members.html">List of all members</a> </div>
<div class="headertitle">
<div class="title">maybe::result&lt; T, E &gt; Class Template Reference</div> </div>
</div><!--header-->
<div class="contents">
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:afb4bf621e4b07f22a52ef48922b02b19"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="afb4bf621e4b07f22a52ef48922b02b19"></a>
typedef T&#160;</td><td class="memItemRight" valign="bottom"><b>ok_type</b></td></tr>
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typedef E&#160;</td><td class="memItemRight" valign="bottom"><b>err_type</b></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (T &amp;&amp;value, internal::placeholder)</td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (internal::placeholder, E &amp;&amp;value)</td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (const T &amp;value, internal::placeholder)</td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>result</b> (internal::placeholder, const E &amp;value)</td></tr>
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<tr class="memitem:a5db8102c6d5edb9ac3cebcbdc3d72ffc"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#a5db8102c6d5edb9ac3cebcbdc3d72ffc">is_ok</a> () const noexcept</td></tr>
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<tr class="memitem:abbd6fd8e97ea6cba418dbd2ec20fb5b3"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#abbd6fd8e97ea6cba418dbd2ec20fb5b3">is_err</a> () const noexcept</td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>operator bool</b> () const noexcept</td></tr>
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constexpr T const &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>ok_value</b> () const &amp;</td></tr>
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constexpr T &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>ok_value</b> ()&amp;</td></tr>
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constexpr T &amp;&amp;&#160;</td><td class="memItemRight" valign="bottom"><b>ok_value</b> ()&amp;&amp;</td></tr>
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template&lt;class V &gt; </td></tr>
<tr class="memitem:a3e2d28f9e0bcdb8278aaf34d176b788c"><td class="memTemplItemLeft" align="right" valign="top">constexpr T&#160;</td><td class="memTemplItemRight" valign="bottom"><b>ok_value_or</b> (V &amp;&amp;v) const &amp;</td></tr>
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template&lt;class V &gt; </td></tr>
<tr class="memitem:a62323fc8607ca5aeb0f3191195f48f34"><td class="memTemplItemLeft" align="right" valign="top">constexpr T&#160;</td><td class="memTemplItemRight" valign="bottom"><b>ok_value_or</b> (V &amp;&amp;v)&amp;&amp;</td></tr>
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constexpr E const &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>err_value</b> () const &amp;</td></tr>
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constexpr E &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>err_value</b> ()&amp;</td></tr>
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constexpr E &amp;&amp;&#160;</td><td class="memItemRight" valign="bottom"><b>err_value</b> ()&amp;&amp;</td></tr>
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template&lt;class V &gt; </td></tr>
<tr class="memitem:ae043371604f5ae1c03d4d6af82d624bd"><td class="memTemplItemLeft" align="right" valign="top">constexpr E&#160;</td><td class="memTemplItemRight" valign="bottom"><b>err_value_or</b> (V &amp;&amp;v) const &amp;</td></tr>
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template&lt;class V &gt; </td></tr>
<tr class="memitem:a78a3e86f68ed0a78be2bfba888a751a1"><td class="memTemplItemLeft" align="right" valign="top">constexpr E&#160;</td><td class="memTemplItemRight" valign="bottom"><b>err_value_or</b> (V &amp;&amp;v)&amp;&amp;</td></tr>
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<tr class="memitem:a96f0e07fda6438e8b2d87f5d7d183a15"><td class="memTemplParams" colspan="2">template&lt;typename F , typename R = typename std::result_of&lt;F(T)&gt;::type&gt; </td></tr>
<tr class="memitem:a96f0e07fda6438e8b2d87f5d7d183a15"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#a96f0e07fda6438e8b2d87f5d7d183a15">map</a> (F f) noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; R, E &gt;</td></tr>
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<tr class="memitem:a30c70c4e37345b4be7877bb18c8ef176"><td class="memTemplParams" colspan="2">template&lt;typename U &gt; </td></tr>
<tr class="memitem:a30c70c4e37345b4be7877bb18c8ef176"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#a30c70c4e37345b4be7877bb18c8ef176">map_value</a> (U value) noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; U, E &gt;</td></tr>
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<tr class="memitem:ad2636eea16dcd35325491d10322da424"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#ad2636eea16dcd35325491d10322da424">and_then</a> (F op) noexcept-&gt; typename std::result_of&lt; F(T)&gt;::type</td></tr>
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<tr class="memitem:af1e9190e3160eb5549994f16b59b8e01"><td class="memTemplItemLeft" align="right" valign="top">auto&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#af1e9190e3160eb5549994f16b59b8e01">into_err</a> () noexcept-&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; U, E &gt; const</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:aea39cbbd5a4e0382f150be760dafe7f8"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; T, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#aea39cbbd5a4e0382f150be760dafe7f8">ok</a> (T &amp;&amp;value) noexcept</td></tr>
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static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; T, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>ok</b> (const T &amp;value) noexcept</td></tr>
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<tr class="memitem:a23e5271cb5d003afbb01d99f511f62b5"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; T, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#a23e5271cb5d003afbb01d99f511f62b5">err</a> (E &amp;&amp;value) noexcept</td></tr>
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static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; T, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>err</b> (const E &amp;value) noexcept</td></tr>
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<tr class="memitem:a556c18ac62ab6c7d6a4fa00ce62a74d4"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; T, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#a556c18ac62ab6c7d6a4fa00ce62a74d4">default_ok</a> () noexcept</td></tr>
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<tr class="memitem:aa551222749a10e8d69b75a081a59b61f"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt; T, E &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="singletonmaybe_1_1result.html#aa551222749a10e8d69b75a081a59b61f">default_err</a> () noexcept</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename T, typename E&gt;<br />
class maybe::result&lt; T, E &gt;</h3>
<p>Definition at line <a class="el" href="result_8fwd_8hpp_source.html#l00015">15</a> of file <a class="el" href="result_8fwd_8hpp_source.html">result.fwd.hpp</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
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template&lt;typename T , typename E &gt; </div>
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template&lt;typename F &gt; </div>
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<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; T, E &gt;::and_then </td>
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<td> -&gt; typename std::result_of&lt;F(T)&gt;::type</td>
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<p>Calls op if the result is ok, otherwise returns the err value of self.</p>
<p>This function can be used for control flow based on result values.</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">f</td><td>F(T) -&gt; maybe::result&lt;U, E&gt; </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;U, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00073">73</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00088">maybe::result&lt; T, E &gt;::err()</a>.</p>
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<td class="memname">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt;T, E&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; T, E &gt;::default_err </td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span><span class="mlabel">noexcept</span></span> </td>
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<p>Create a new err value using <code>E()</code> constructor.</p>
<dl class="section return"><dt>Returns</dt><dd>result&lt;T, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00114">114</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
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<p>Create a new ok value using <code>T()</code> constructor.</p>
<dl class="section return"><dt>Returns</dt><dd>result&lt;T, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00104">104</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
<p>Referenced by <a class="el" href="result_8inline_8hpp_source.html#l00085">maybe::result&lt; T, E &gt;::into_err()</a>, and <a class="el" href="result_8inline_8hpp_source.html#l00154">maybe::result&lt; void, E &gt;::into_err()</a>.</p>
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<td>(</td>
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<td class="paramname"><em>value</em></td><td>)</td>
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<p>Create a new err value.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">E</td><td>value </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>result&lt;T, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00088">88</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
<p>Referenced by <a class="el" href="result_8inline_8hpp_source.html#l00073">maybe::result&lt; T, E &gt;::and_then()</a>, <a class="el" href="result_8inline_8hpp_source.html#l00143">maybe::result&lt; void, E &gt;::and_then()</a>, <a class="el" href="result_8inline_8hpp_source.html#l00017">maybe::result&lt; T, E &gt;::map()</a>, <a class="el" href="result_8inline_8hpp_source.html#l00062">maybe::result&lt; T, E &gt;::map_err_value()</a>, <a class="el" href="result_8inline_8hpp_source.html#l00038">maybe::result&lt; T, E &gt;::map_value()</a>, <a class="el" href="result_8inline_8hpp_source.html#l00108">maybe::result&lt; void, E &gt;::map_value()</a>, and <a class="el" href="result_8inline_8hpp_source.html#l00027">maybe::result&lt; T, E &gt;::map_void()</a>.</p>
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<td>(</td>
<td class="paramname"></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;U, E&gt; const</td>
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<p>Converts into another result with different ok type <code>U</code> and forwards the same error.</p>
<p>The ok type <code>U</code> must have <code>U()</code> constructor in case the result does not contain an err.</p>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;U, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00085">85</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00104">maybe::result&lt; T, E &gt;::default_ok()</a>.</p>
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<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Check if result contains err value.</p>
<dl class="section return"><dt>Returns</dt><dd>bool </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00136">136</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
<p>Referenced by <a class="el" href="result_8inline_8hpp_source.html#l00154">maybe::result&lt; void, E &gt;::into_err()</a>.</p>
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<td>(</td>
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<td> const</td>
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<p>Check if result contains ok value.</p>
<dl class="section return"><dt>Returns</dt><dd>bool </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00126">126</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
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<td class="memname">auto <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; T, E &gt;::map </td>
<td>(</td>
<td class="paramtype">F&#160;</td>
<td class="paramname"><em>f</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;R, E&gt;</td>
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<p>Maps a result&lt;T, E&gt; to result&lt;U, E&gt; (where U is return value of F(T)) by applying a function F to a contained ok value, leaving an err value untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">f</td><td>F(T) -&gt; U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;U, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00017">17</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00088">maybe::result&lt; T, E &gt;::err()</a>.</p>
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<td>(</td>
<td class="paramtype">F&#160;</td>
<td class="paramname"><em>f</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;T, typename std::result_of&lt;F(E)&gt;::type&gt;</td>
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<p>Maps a result&lt;T, E&gt; to result&lt;T, U&gt; (where U is return value of F(E)) by applying a function to a function to a contained err value, leaving an ok value untouched.</p>
<p>This function can be used to pass through a successful result while changing an error.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">f</td><td>F(E) -&gt; U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;T, U&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00049">49</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
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<td>(</td>
<td class="paramtype">U&#160;</td>
<td class="paramname"><em>value</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;T, U&gt;</td>
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<p>Maps a result&lt;T, E&gt; to result&lt;T, U&gt; by always returning provided U value on error, leaving an ok value untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;T, U&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00062">62</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00088">maybe::result&lt; T, E &gt;::err()</a>.</p>
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<td>(</td>
<td class="paramtype">U&#160;</td>
<td class="paramname"><em>value</em></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;U, E&gt;</td>
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<p>Maps a result&lt;T, E&gt; to result&lt;U, E&gt; by always returning provided U value on success, leaving an err value untouched.</p>
<p>This function can be used to compose the results of two functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>U </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>maybe::result&lt;U, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00038">38</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00088">maybe::result&lt; T, E &gt;::err()</a>.</p>
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<td>(</td>
<td class="paramname"></td><td>)</td>
<td> -&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt;void, E&gt;</td>
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<p>Maps a result&lt;T, E&gt; to <a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">result&lt;void, E&gt;</a>, leaving an err value untouched.</p>
<dl class="section return"><dt>Returns</dt><dd><a class="el" href="classmaybe_1_1result_3_01void_00_01_e_01_4.html">maybe::result&lt;void, E&gt;</a> </dd></dl>
<p>Definition at line <a class="el" href="result_8inline_8hpp_source.html#l00027">27</a> of file <a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a>.</p>
<p>References <a class="el" href="result_8hpp_source.html#l00088">maybe::result&lt; T, E &gt;::err()</a>.</p>
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<td class="memname">static constexpr <a class="el" href="singletonmaybe_1_1result.html">result</a>&lt;T, E&gt; <a class="el" href="singletonmaybe_1_1result.html">maybe::result</a>&lt; T, E &gt;::ok </td>
<td>(</td>
<td class="paramtype">T &amp;&amp;&#160;</td>
<td class="paramname"><em>value</em></td><td>)</td>
<td></td>
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<p>Create a new ok value.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">T</td><td>value </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>result&lt;T, E&gt; </dd></dl>
<p>Definition at line <a class="el" href="result_8hpp_source.html#l00071">71</a> of file <a class="el" href="result_8hpp_source.html">result.hpp</a>.</p>
<p>Referenced by <a class="el" href="result_8inline_8hpp_source.html#l00132">maybe::result&lt; void, E &gt;::map_err_value()</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following files:<ul>
<li>src/maybe/<a class="el" href="result_8fwd_8hpp_source.html">result.fwd.hpp</a></li>
<li>src/maybe/<a class="el" href="result_8hpp_source.html">result.hpp</a></li>
<li>src/maybe/<a class="el" href="result_8inline_8hpp_source.html">result.inline.hpp</a></li>
</ul>
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