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<channel>
    <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>[SERVER-32434] operator&lt;&lt;(ostream,StringData) ignores stream state.</title>
                <link>https://jira.mongodb.org/browse/SERVER-32434</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;    ostream &amp;lt;&amp;lt; std::setw(5) &amp;lt;&amp;lt; expr&lt;/p&gt;

&lt;p&gt;behaves differently depending on whether expr is a std::string or a StringData.&lt;/p&gt;

&lt;p&gt;libc++&apos;s operator&amp;lt;&amp;lt;(ostream, string_view) is complex, but accessible for reuse.&lt;br/&gt;
&lt;a href=&quot;https://github.com/llvm-mirror/libcxx/blob/0f25cd9/include/ostream#L714&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/llvm-mirror/libcxx/blob/0f25cd9/include/ostream#L714&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="475023">SERVER-32434</key>
            <summary>operator&lt;&lt;(ostream,StringData) ignores stream state.</summary>
                <type id="5" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14716&amp;avatarType=issuetype">Sub-task</type>
                            <parent id="474744">SERVER-32422</parent>
                                    <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="billy.donahue@mongodb.com">Billy Donahue</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                    </labels>
                <created>Thu, 21 Dec 2017 03:20:03 +0000</created>
                <updated>Tue, 31 Oct 2023 00:35:51 +0000</updated>
                            <resolved>Thu, 11 Jul 2019 12:49:39 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Portability</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2320530" author="xgen-internal-githook" created="Thu, 11 Jul 2019 05:28:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Billy Donahue&apos;, &apos;email&apos;: &apos;billy.donahue@mongodb.com&apos;, &apos;username&apos;: &apos;BillyDonahue&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32434&quot; title=&quot;operator&amp;lt;&amp;lt;(ostream,StringData) ignores stream state.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32434&quot;&gt;&lt;del&gt;SERVER-32434&lt;/del&gt;&lt;/a&gt; operator&amp;lt;&amp;lt;(ostream,StringData)&lt;/p&gt;

&lt;p&gt;    use boost::string_view for operator&amp;lt;&amp;lt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7f89b539052ba710714c2cd09fd7276a293dd6cc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7f89b539052ba710714c2cd09fd7276a293dd6cc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2320136" author="billy.donahue" created="Wed, 10 Jul 2019 20:30:06 +0000"  >&lt;p&gt;&lt;a href=&quot;https://mongodbcr.appspot.com/500050001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/500050001/&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2319859" author="acm" created="Wed, 10 Jul 2019 17:40:31 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=billy.donahue&quot; class=&quot;user-hover&quot; rel=&quot;billy.donahue&quot;&gt;billy.donahue&lt;/a&gt; - &lt;/p&gt;

&lt;p&gt;I think we may have a nice easy way to do this by leveraging the &lt;tt&gt;basic_string_view&lt;/tt&gt; from boost. Please see my comment on &lt;a href=&quot;https://mongodbcr.appspot.com/179290001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/179290001/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Reassigning the ticket over to you to see if that works, since you have the unit test in your tree. If so I think we have a quick resolution for this, finally.&lt;/p&gt;</comment>
                            <comment id="2295004" author="billy.donahue" created="Mon, 24 Jun 2019 16:21:19 +0000"  >&lt;p&gt;It was discussed whether we could use fmt::basic_string_view instead of std::basic_string_view for streaming, as a workaround.&lt;br/&gt;
fmt::basic_string_view doesn&apos;t have an operator&amp;lt;&amp;lt; at all.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/fmtlib/fmt/blob/master/include/fmt/core.h#L235&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/fmtlib/fmt/blob/master/include/fmt/core.h#L235&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2291920" author="billy.donahue" created="Thu, 20 Jun 2019 19:24:50 +0000"  >&lt;p&gt;We could also revisit my original implementation to hold us over.&lt;br/&gt;
&lt;a href=&quot;https://mongodbcr.appspot.com/179290001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/179290001/&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2291641" author="acm" created="Thu, 20 Jun 2019 17:00:15 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jesse&quot; class=&quot;user-hover&quot; rel=&quot;jesse&quot;&gt;jesse&lt;/a&gt; - Thanks for pursuing that, sorry it didn&apos;t work out. I think we should defer this ticket as you suggested. Can you put it back into &apos;needs scheduling&apos; and we can find its new home at our next triage meeting.&lt;/p&gt;</comment>
                            <comment id="2290782" author="jesse" created="Thu, 20 Jun 2019 01:48:47 +0000"  >&lt;p&gt;I can reproduce the failure locally (macOS 10.13, XCode 10.1), and bumping SCons&apos;s -mmacosx-version-min argument from &quot;10.12&quot; to &quot;10.13&quot; has no effect.&lt;/p&gt;

&lt;p&gt;In Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++ the v1/string_view header file has no operator&amp;lt;&amp;lt;. However, there&apos;s a v1/experimental/string_view file that does implement operator&amp;lt;&amp;lt;. So, something like this works for XCode 10.1:&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;// As of Clang 10, operator&amp;lt;&amp;lt;(ostream, string_view) is still in the experimental/string_view header.&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;// clang-format off&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;#ifdef __has_include&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;#if __has_include(&amp;lt;experimental/string_view&amp;gt;)&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;#include &amp;lt;experimental/string_view&amp;gt;&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;#define EXPERIMENTAL_STRING_VIEW&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;#endif&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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						&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;#endif&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;// clang-format on&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;&amp;nbsp;&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;#ifndef EXPERIMENTAL_STRING_VIEW&lt;/span&gt;&lt;/pre&gt;
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						&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;#include &amp;lt;string_view&amp;gt;&lt;/span&gt;&lt;/pre&gt;
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				&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;#endif&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;However, I patch-built that and it fails with XCode 10.2 on our build farm. The reason is that v1/string_view still has no operator&amp;lt;&amp;lt; and the contents of v1/experimental/string_view are now:&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;#error &quot;&amp;lt;experimental/string_view&amp;gt; has been removed. Use &amp;lt;string_view&amp;gt; instead.&quot;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;It seems like XCode was determined not to implement this operator, at least in the 10.x series.&lt;/p&gt;</comment>
                            <comment id="2288274" author="acm" created="Tue, 18 Jun 2019 12:15:06 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jesse&quot; class=&quot;user-hover&quot; rel=&quot;jesse&quot;&gt;jesse&lt;/a&gt; - Before we give up, I&apos;d like to try something. Can you reproduce this link error locally? If so, I&apos;d like to know if it still happens if we raise our macOS target minimum. It may be that the required function is missing from libc++ at the macOS 10.12 ABI target, but is present in one of the later ones. If so, we could consider bumping our target macOS minimum for 4.3+.&lt;/p&gt;</comment>
                            <comment id="2287712" author="jesse" created="Mon, 17 Jun 2019 20:29:46 +0000"  >&lt;p&gt;My solution was simple:&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;inline std::ostream&amp;amp; operator&amp;lt;&amp;lt;(std::ostream&amp;amp; stream, StringData value) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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						&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;    return stream &amp;lt;&amp;lt; std::string_view(value.rawData(), value.size());&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&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;
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			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;That works in GCC and MSVC, but as of clang 10.0, string_view.h doesn&apos;t have this operator although it&apos;s in the standard:&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;
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						&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;    template&amp;lt;class charT, class traits&amp;gt;&lt;/span&gt;&lt;/pre&gt;
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						&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;      basic_ostream&amp;lt;charT, traits&amp;gt;&amp;amp;&lt;/span&gt;&lt;/pre&gt;
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						&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;        operator&amp;lt;&amp;lt;(basic_ostream&amp;lt;charT, traits&amp;gt;&amp;amp; os,&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;                   basic_string_view&amp;lt;charT, traits&amp;gt; str);&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;So we get compilation errors on Mac. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=acm&quot; class=&quot;user-hover&quot; rel=&quot;acm&quot;&gt;acm&lt;/a&gt;, should we defer this ticket again and wait longer for our toolchains to catch up to C++17?&lt;/p&gt;</comment>
                            <comment id="2284165" author="jesse" created="Thu, 13 Jun 2019 21:51:31 +0000"  >&lt;p&gt;The previous attempt was deferred until C++17. Now we can use string_view&apos;s implementation of I/O manipulators to support StringData very simply.&lt;/p&gt;</comment>
                            <comment id="1757516" author="billy.donahue" created="Thu, 21 Dec 2017 03:23:08 +0000"  >&lt;p&gt;&lt;a href=&quot;https://mongodbcr.appspot.com/179290001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/179290001/&lt;/a&gt;&lt;/p&gt;</comment>
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