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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-45118] Documentation for BSONElement::numberInt() and BSONElement::numberLong() should be improved</title>
                <link>https://jira.mongodb.org/browse/SERVER-45118</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As of this writing, the comments appear like so:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    /** Retrieve int value for the element safely.  Zero returned if not a number. */&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    int numberInt() const;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    /** Retrieve long value for the element safely.  Zero returned if not a number.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;     *  Behavior is not defined for double values that are NaNs, or too large/small&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;     *  to be represented by long longs */&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    long long numberLong() const;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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&lt;p/&gt;

&lt;p&gt;There are a few problems with this:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;The documentation for numberLong() elaborates about undefined behavior for NaN and large doubles, but we don&apos;t have the same documentation for numberInt().&lt;/li&gt;
	&lt;li&gt;While we&apos;re at it, we should be explicit that calling this on +/-infinity is also UB.&lt;/li&gt;
	&lt;li&gt;It&apos;s unclear what&apos;s meant by &quot;safely&quot; in these comments. In fact, these operations are unsafe to perform on an arbitrary BSONElement due to the possibility of undefined behavior. That&apos;s why we have a separate function called &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a02960827dd9d145292eb32d9745cdd52001ebda/src/mongo/bson/bsonelement.h#L354&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BSONElement::safeNumberLong()&lt;/a&gt;. I recommend that we delete the word &quot;safely&quot;.&lt;/li&gt;
	&lt;li&gt;The sentence &quot;Zero returned if not a number&quot; is confusing, since it doesn&apos;t disambiguate between NaN and non-numeric BSON types. We should say &quot;Zero is returned if the BSON type is non-numeric. Results in undefined behavior if the BSON type is numeric but the value is NaN, +/-Infinity, ...&quot;.&lt;/li&gt;
&lt;/ol&gt;
</description>
                <environment></environment>
        <key id="1050788">SERVER-45118</key>
            <summary>Documentation for BSONElement::numberInt() and BSONElement::numberLong() should be improved</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                            <label>qexec-team</label>
                    </labels>
                <created>Thu, 12 Dec 2019 22:15:58 +0000</created>
                <updated>Sun, 29 Oct 2023 22:14:05 +0000</updated>
                            <resolved>Wed, 15 Jan 2020 00:25:19 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="2725648" author="xgen-internal-githook" created="Wed, 15 Jan 2020 00:19:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Storch&apos;, &apos;email&apos;: &apos;david.storch@mongodb.com&apos;, &apos;username&apos;: &apos;dstorch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45118&quot; title=&quot;Documentation for BSONElement::numberInt() and BSONElement::numberLong() should be improved&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45118&quot;&gt;&lt;del&gt;SERVER-45118&lt;/del&gt;&lt;/a&gt; Improve comments for BSONElement::numberInt() and BSONElement::numberLong().&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2149c69b419c26042b98229f5c289511ca0bad26&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2149c69b419c26042b98229f5c289511ca0bad26&lt;/a&gt;&lt;/p&gt;</comment>
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