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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>
    </build-info>


<item>
            <title>[GODRIVER-2812] Make &quot;WriteConcern&quot; struct parameterized to accept either int or string for W</title>
                <link>https://jira.mongodb.org/browse/GODRIVER-2812</link>
                <project id="14289" key="GODRIVER">Go Driver</project>
                    <description>&lt;p&gt;When &lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-2685&quot; title=&quot;Simplify &amp;quot;writeconcern&amp;quot; API&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-2685&quot;&gt;&lt;del&gt;GODRIVER-2685&lt;/del&gt;&lt;/a&gt; is complete, the &lt;tt&gt;W&lt;/tt&gt; field in the &lt;tt&gt;writeconcern.WriteConcern&lt;/tt&gt; struct will be exported and visible/settable by anyone. While that simplifies the &lt;tt&gt;writeconcern&lt;/tt&gt; package API, the field can be either a string or an int, so it has to be type interface{}, which can be confusing to users because it doesn&apos;t specify what type is required (any value can be set, but some values will result in BSON marshal errors).&lt;/p&gt;

&lt;p&gt;For Go Driver 2.0, we can use generics, so make &lt;tt&gt;WriteConcern&lt;/tt&gt; parameterized so we can limit the types usable for &lt;tt&gt;W&lt;/tt&gt; to &lt;tt&gt;int&lt;/tt&gt; or &lt;tt&gt;string&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;E.g.&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;type WriteConcern[T string | int] struct {&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;	W T&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;	// ...&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;Definition of done:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;The &lt;tt&gt;W&lt;/tt&gt; field on a &lt;tt&gt;WriteConcern&lt;/tt&gt; can only be a string or an int.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Note that users will have to update any WriteConcern literal declarations to include the type parameter. E.g.&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;   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;&amp;amp;writeconcern.WriteConcern[int]{W: 2}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="2314676">GODRIVER-2812</key>
            <summary>Make &quot;WriteConcern&quot; struct parameterized to accept either int or string for W</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="matt.dale@mongodb.com">Matt Dale</reporter>
                        <labels>
                    </labels>
                <created>Fri, 14 Apr 2023 03:54:38 +0000</created>
                <updated>Wed, 30 Aug 2023 22:30:06 +0000</updated>
                            <resolved>Mon, 1 May 2023 19:12:31 +0000</resolved>
                                                                    <component>Read and Write Concern</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5391868" author="JIRAUSER1259527" created="Mon, 1 May 2023 19:12:31 +0000"  >&lt;p&gt;This is actually not practically with the current &lt;tt&gt;options&lt;/tt&gt; API. Go methods cannot have type constraints, only functions and structs can. As a result, an options setter method like &lt;tt&gt;SetWriteConcern&lt;/tt&gt; can&apos;t accept a generic struct unless the receiver (i.e. the &lt;tt&gt;ClientOptions&lt;/tt&gt;) also has type parameters. For example, to set a write concern &lt;tt&gt;w:1&lt;/tt&gt; on a Client, you&apos;d need to specify the parameter type on the &lt;tt&gt;ClientOptions&lt;/tt&gt; struct as well as the &lt;tt&gt;WriteConcern&lt;/tt&gt; struct:&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;wc := writeconcern.WriteConcern[int]{W: 1}&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;options.Client[int]().SetWriteConcern(wc)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;That API is extremely non-intuitive, so we shouldn&apos;t do that.&lt;/p&gt;

&lt;p&gt;Instead, we should either just leave it empty interface or define a type that can only be a string or an int.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2207853">GODRIVER-2685</issuekey>
        </issuelink>
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                                    </issuelinktype>
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