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Notes from the Issues Telecon 4-Feb-2016
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‎xml/issue2549.xml

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@@ -7,7 +7,7 @@ to temporaries and will create dangling references</title>
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<section><sref ref="[tuple.cnstr]"/></section>
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<submitter>Ville Voutilainen</submitter>
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<date>11 Oct 2015</date>
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<priority>99</priority>
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<priority>2</priority>
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<discussion>
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<p>

‎xml/issue2550.xml

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<section><sref ref="[unord.req]"/></section>
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<submitter>Yegor Derevenets</submitter>
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<date>11 Oct 2015</date>
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<priority>99</priority>
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<priority>2</priority>
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<discussion>
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<p>

‎xml/issue2552.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<!DOCTYPE issue SYSTEM "lwg-issue.dtd">
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<issue num="2552" status="New">
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<issue num="2552" status="NAD">
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<title><tt>priority_queue</tt> doesn't work with move-only types</title>
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<section><sref ref="[priority.queue]"/></section>
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<submitter>Matt Austern</submitter>
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<date>27 Oct 2015</date>
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<priority>99</priority>
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<priority>3</priority>
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<discussion>
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<p>
@@ -36,6 +36,11 @@ auto tmp = move(c.back());
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c.pop_back();
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return tmp;
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</pre></blockquote>
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<note>2016-02, Issues Telecon</note>
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<p>
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This should be addressed by a paper addressed to LEWG.
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</p>
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</discussion>
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<resolution>

‎xml/issue2554.xml

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<section><sref ref="[utility.swap]"/></section>
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<submitter>Orson Peters</submitter>
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<date>1 Nov 2015</date>
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<priority>99</priority>
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<priority>2</priority>
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<discussion>
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<p>

‎xml/issue2557.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<!DOCTYPE issue SYSTEM "lwg-issue.dtd">
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<issue num="2557" status="New">
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<issue num="2557" status="Tentatively Ready">
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<title>Logical operator traits are broken in the zero-argument case</title>
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<section><sref ref="[meta.logical]"/></section>
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<submitter>Geoffrey Romer</submitter>
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<date>5 Nov 2015</date>
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<priority>99</priority>
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<priority>0</priority>
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<discussion>
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<p>
@@ -29,6 +29,11 @@ I can editorially remove the mention of <tt>true_type</tt>, which seems to have
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Similar comments apply to the <tt>disjunction</tt> trait, and to the corresponding traits in the Fundamentals working
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paper, see LWG <iref ref="2558"/>.
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</p>
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<note>2016-02, Issues Telecon</note>
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<p>
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P0; move to Tentatively Ready.
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</p>
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</discussion>
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<resolution>

‎xml/issue2558.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<!DOCTYPE issue SYSTEM "lwg-issue.dtd">
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<issue num="2558" status="New">
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<issue num="2558" status="Tentatively Ready">
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<title>[fund.ts.v2] Logical operator traits are broken in the zero-argument case</title>
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<section><sref ref="[meta.logical]"/></section>
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<submitter>Geoffrey Romer</submitter>
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<date>5 Nov 2015</date>
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<priority>99</priority>
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<priority>0</priority>
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<discussion>
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<p><b>Addresses: fund.ts.v2</b></p>
@@ -30,6 +30,11 @@ I can editorially remove the mention of <tt>true_type</tt>, which seems to have
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Similar comments apply to the <tt>disjunction</tt> trait, and to the corresponding traits in the C++ working paper,
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see LWG <iref ref="2557"/>.
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</p>
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<note>2016-02, Issues Telecon</note>
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<p>
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P0; move to Tentatively Ready.
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</p>
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</discussion>
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<resolution>

‎xml/issue2559.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<!DOCTYPE issue SYSTEM "lwg-issue.dtd">
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<issue num="2559" status="New">
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<issue num="2559" status="Tentatively Ready">
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<title>Error in LWG 2234's resolution</title>
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<section><sref ref="[assertions]"/></section>
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<submitter>Tim Song</submitter>
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<date>7 Nov 2015</date>
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<priority>99</priority>
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<priority>0</priority>
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<discussion>
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<p>
@@ -17,6 +17,11 @@ This is incorrect, as noted in one of STL's comments in that issue's discussion,
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<p/>
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The proposed resolution below just borrows STL's phrasing from the discussion.
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</p>
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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</p>
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</discussion>
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<resolution>

‎xml/issue2560.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<!DOCTYPE issue SYSTEM "lwg-issue.dtd">
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<issue num="2560" status="New">
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<issue num="2560" status="Tentatively Ready">
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<title><tt>is_constructible</tt> underspecified when applied to a function type</title>
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<section><sref ref="[meta.unary.prop]"/></section>
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<submitter>Richard Smith</submitter>
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<date>14 Nov 2015</date>
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<priority>99</priority>
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<priority>0</priority>
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<discussion>
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<p>
@@ -44,6 +44,11 @@ resolution would be applied to the working paper, it wouldn't break existing imp
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gcc 5.x until gcc 6.0, and Visual Studio 2015, all of these implementations evaluate <tt>is_constructible&lt;void()&gt;::value</tt>
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to <tt>false</tt>.
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</p>
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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</p>
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</discussion>
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<resolution>

‎xml/issue2562.xml

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<section><sref ref="[comparisons]"/></section>
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<submitter>Casey Carter</submitter>
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<date>18 Nov 2015</date>
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<priority>99</priority>
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<priority>3</priority>
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<p>

‎xml/issue2563.xml

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<section><sref ref="[member.functions]"/></section>
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<submitter>Ville Voutilainen</submitter>
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<date>29 Nov 2015</date>
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<priority>99</priority>
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<priority>2</priority>
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<p>

‎xml/issue2564.xml

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<section><sref ref="[func.wrap.func]"/></section>
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<submitter>Tim Song </submitter>
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<date>5 Dec 2015</date>
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<priority>99</priority>
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<priority>3</priority>
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<p><b>Addresses: fund.ts.v2</b></p>

‎xml/issue2565.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<!DOCTYPE issue SYSTEM "lwg-issue.dtd">
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<issue num="2565" status="New">
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<issue num="2565" status="Tentatively Ready">
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<title><tt>std::function</tt>'s move constructor should guarantee nothrow for <tt>reference_wrapper</tt>s and function pointers</title>
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<section><sref ref="[func.wrap.func.con]"/></section>
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<submitter>Tim Song</submitter>
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<date>5 Dec 2015</date>
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<p>
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<sref ref="[func.wrap.func.con]"/>/5 guarantees that copying a <tt>std::function</tt> whose "target is a callable object passed
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via <tt>reference_wrapper</tt> or a function pointer" does not throw exceptions, but the standard doesn't provide this guarantee for the move constructor,
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which makes scant sense.
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</p>
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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</p>
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<resolution>

‎xml/issue2566.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<!DOCTYPE issue SYSTEM "lwg-issue.dtd">
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<issue num="2566" status="New">
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<issue num="2566" status="Tentatively Ready">
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<title>Requirements on the first template parameter of container adaptors</title>
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<section><sref ref="[container.adaptors]"/></section>
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<submitter>Tim Song</submitter>
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<date>8 Dec 2015</date>
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<p>
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This permits confusing and arguably nonsensical types like <tt>queue&lt;double, deque&lt;std::string&gt;&gt;</tt> or
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<tt>priority_queue&lt;std::nothrow_t, vector&lt;int&gt;&gt;</tt>, which presumably wasn't intended.
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</p>
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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</p>
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‎xml/issue2567.xml

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@@ -7,7 +7,7 @@ and <tt>BinaryTypeTraits</tt></title>
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<section><sref ref="[meta.logical]"/></section>
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<submitter>Tim Song</submitter>
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<date>10 Dec 2015</date>
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<priority>2</priority>
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<p>

‎xml/issue2568.xml

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<section><sref ref="[meta.logical]"/></section>
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<submitter>Tim Song</submitter>
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<date>10 Dec 2015</date>
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<p><b>Addresses: fund.ts.v2</b></p>

‎xml/issue2569.xml

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<section><sref ref="[meta.logical]"/></section>
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<submitter>Tim Song</submitter>
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<date>11 Dec 2015</date>
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‎xml/issue2570.xml

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<section><sref ref="[meta.logical]"/></section>
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<submitter>Tim Song</submitter>
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<date>11 Dec 2015</date>
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<p><b>Addresses: fund.ts.v2</b></p>

‎xml/issue2571.xml

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<?xml version='1.0' encoding='UTF-8' standalone='no'?>
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<issue num="2571" status="New">
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<issue num="2571" status="Tentatively Ready">
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<title>[map.modifiers]/2 imposes nonsensical requirement on <tt>insert(InputIterator, InputIterator)</tt></title>
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<section><sref ref="[map.modifiers]"/></section>
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<submitter>Tim Song</submitter>
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<date>12 Dec 2015</date>
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<p>
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that <tt>value_type</tt> be <tt>EmplaceConstructible</tt> from <tt>*i</tt>. If so, then the signature should just be
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deleted from this section.
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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‎xml/issue2572.xml

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<issue num="2572" status="Tentatively Ready">
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<title>The remarks for <tt>shared_ptr::operator*</tt> should apply to <i>cv</i>-qualified <tt>void</tt> as well</title>
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<section><sref ref="[util.smartptr.shared.obs]"/></section>
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<submitter>Tim Song</submitter>
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<date>13 Dec 2015</date>
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<p>
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This remark should also apply when <tt>T</tt> is <i>cv</i>-qualified <tt>void</tt> (compare LWG <iref ref="2500"/>).
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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‎xml/issue2574.xml

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<title>[fund.ts.v2] <tt>std::experimental::function::operator=(F&amp;&amp;)</tt> should be constrained</title>
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<section><sref ref="[func.wrap.func.con]"/></section>
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<submitter>Tim Song</submitter>
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<date>5 Dec 2015</date>
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<p><b>Addresses: fund.ts.v2</b></p>
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The constructors of <tt>std::experimental::function</tt> isn't separately specified in the fundamentals TS and so inherited the
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constraints from C++14, but the assignment operator is separately specified and presumably needs to be constrained.
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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‎xml/issue2575.xml

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<issue num="2575" status="New">
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<issue num="2575" status="Tentatively Ready">
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<title>[fund.ts.v2] <tt>experimental::function::assign</tt> should be removed</title>
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<section><sref ref="[func.wrap.func]"/></section>
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<submitter>Tim Song</submitter>
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<date>20 Dec 2015</date>
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<p><b>Addresses: fund.ts.v2</b></p>
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<tt>std::experimental::function</tt> makes no sense (it causes undefined behavior unless the allocator passed compares equal
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to the one already used by <tt>*this</tt>) and should be removed.
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<note>2016-02, Issues Telecon</note>
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P0; move to Tentatively Ready.
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