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    <title>MongoDB Jira</title>
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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-37360] Make `StatusWith` accept types with implicit conversion semantics.</title>
                <link>https://jira.mongodb.org/browse/SERVER-37360</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Use the enable-if for non-explicit constructors trick that `std::optional` uses to make `std::optional&amp;lt; std::unique_ptr&amp;lt; Base &amp;gt; &amp;gt;` accept `std::unique_ptr&amp;lt; Derived &amp;gt;` implicitly.&lt;/p&gt;

&lt;p&gt;This will permit things like this, among others:&lt;/p&gt;

&lt;p&gt;```&lt;br/&gt;
StatusWith&amp;lt; boost::optional&amp;lt; std::unique_ptr&amp;lt; Base &amp;gt; &amp;gt; &amp;gt;&lt;br/&gt;
function()&lt;/p&gt;
{
&#160; if( condition1() ) return boost::none;
&#160; if( condition2() ) return std::make_unique&amp;lt; Derived &amp;gt;();
&#160; if( condition3() ) return nullptr;
&#160; return Status( ErrorCodes::SomethingFailed, &quot;Something is broken&quot; );
}
&lt;p&gt;```&lt;/p&gt;</description>
                <environment></environment>
        <key id="611044">SERVER-37360</key>
            <summary>Make `StatusWith` accept types with implicit conversion semantics.</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="adam.martin@mongodb.com">ADAM Martin</assignee>
                                    <reporter username="adam.martin@mongodb.com">ADAM Martin</reporter>
                        <labels>
                    </labels>
                <created>Thu, 27 Sep 2018 19:36:41 +0000</created>
                <updated>Sun, 29 Oct 2023 22:27:51 +0000</updated>
                            <resolved>Thu, 27 Sep 2018 22:20:37 +0000</resolved>
                                                    <fixVersion>4.1.4</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2017012" author="xgen-internal-githook" created="Thu, 27 Sep 2018 22:19:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;ADAM David Alan Martin&apos;, &apos;email&apos;: &apos;adam.martin@10gen.com&apos;, &apos;username&apos;: &apos;adamlsd&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37360&quot; title=&quot;Make `StatusWith` accept types with implicit conversion semantics.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37360&quot;&gt;&lt;del&gt;SERVER-37360&lt;/del&gt;&lt;/a&gt; `StatusWith` implicit conversions support.&lt;/p&gt;

&lt;p&gt;This uses a variation of the technique used in `std::optional` to&lt;br/&gt;
permit chained implicit conversions in constructors.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/46fcb2b57e02b54c37112cb247da4d21bc505533&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/46fcb2b57e02b54c37112cb247da4d21bc505533&lt;/a&gt;&lt;/p&gt;</comment>
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