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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-54032] checked_cast improvements</title>
                <link>https://jira.mongodb.org/browse/SERVER-54032</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Unconditionally return the result of a static_cast, not dynamic_cast.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Only do the dynamic_cast in debug builds as a look-see. We don&apos;t want interferences from dynamic_cast&apos;s capability to do side-casts, producing code that only compiles in debug builds.&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Add a sfinae check on checked_cast so it only participates in overload resolution when a static_cast would succeed.&lt;/li&gt;
&lt;/ul&gt;




&lt;p&gt;References:&lt;/p&gt;

&lt;p&gt;Realm&apos;s checked_cast import:&lt;br/&gt;
&lt;a href=&quot;https://github.com/realm/realm-core/pull/4331/files#diff-e5bfb8e3654dd2c72e622d276e0cde39f22951a14d18c28631676808c51bc8ce&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/realm/realm-core/pull/4331/files#diff-e5bfb8e3654dd2c72e622d276e0cde39f22951a14d18c28631676808c51bc8ce&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Possible improvement on that from using stdx::is_detected.&lt;br/&gt;
&lt;a href=&quot;https://gcc.godbolt.org/z/dj57bT&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://gcc.godbolt.org/z/dj57bT&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Suggested by Mathias in a server-servicearch Slack thread.&lt;br/&gt;
&lt;a href=&quot;https://mongodb.slack.com/archives/CMLKU7Y1M/p1611141797007100&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodb.slack.com/archives/CMLKU7Y1M/p1611141797007100&lt;/a&gt;&lt;/p&gt;
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                <environment></environment>
        <key id="1600032">SERVER-54032</key>
            <summary>checked_cast improvements</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                            <label>re-triaged-ticket</label>
                            <label>servicearch-wfbf-day</label>
                    </labels>
                <created>Mon, 25 Jan 2021 20:45:09 +0000</created>
                <updated>Thu, 23 Mar 2023 20:17:46 +0000</updated>
                                                                            <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="4421583" author="JIRAUSER1262719" created="Fri, 18 Mar 2022 19:26:13 +0000"  >&lt;p&gt;We haven&#8217;t heard back from you for some time, so we&apos;re going to close this ticket. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;</comment>
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