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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="swap2.html" title="cpp/experimental/propagate const/swap2"><span class="t-lines"><span>swap</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="get_underlying.html" title="cpp/experimental/propagate const/get underlying"><span class="t-lines"><span>get_underlying</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Helper classes</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="hash.html" title="cpp/experimental/propagate const/hash"><span class="t-lines"><span>std::hash</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="cmp_func.html" title="cpp/experimental/propagate const/cmp func"><span class="t-lines"><span>std::equal_to</span><span>std::not_equal_to</span><span>std::less</span><span>std::greater</span><span>std::less_equal</span><span>std::greater_equal</span></span></a></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/experimental/propagate_const/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dcl t-since-libfund_ts_2">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> propagate_const<span class="br0">(</span><span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span></span></div></td>
<td> (1) </td>
<td> <span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(library fundamentals TS v2)</span> </td>
</tr>
<tr class="t-dcl t-since-libfund_ts_2">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> propagate_const<span class="br0">(</span> propagate_const<span class="sy3">&&</span> p <span class="br0">)</span> <span class="sy1">=</span> <span class="kw1">default</span><span class="sy4">;</span></span></div></td>
<td> (2) </td>
<td> <span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(library fundamentals TS v2)</span> </td>
</tr>
<tr class="t-dcl t-since-libfund_ts_2">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> U<span class="sy1">></span><br />
<span class="coMULTI">/* see below */</span> <span class="kw4">constexpr</span> propagate_const<span class="br0">(</span> propagate_const<span class="sy1"><</span>U<span class="sy1">></span><span class="sy3">&&</span> pu <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (3) </td>
<td> <span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(library fundamentals TS v2)</span> </td>
</tr>
<tr class="t-dcl t-since-libfund_ts_2">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> U<span class="sy1">></span><br />
<span class="coMULTI">/* see below */</span> <span class="kw4">constexpr</span> propagate_const<span class="br0">(</span> U<span class="sy3">&&</span> u <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (4) </td>
<td> <span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(library fundamentals TS v2)</span> </td>
</tr>
<tr class="t-dcl t-since-libfund_ts_2">
<td> <div><span class="mw-geshi cpp source-cpp">propagate_const<span class="br0">(</span> <span class="kw4">const</span> propagate_const<span class="sy3">&</span> <span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span></span></div></td>
<td> (5) </td>
<td> <span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(library fundamentals TS v2)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>Let <code>t_</code> designate the private data member that is the wrapped pointer-like object.
</p><p>1) Constructs an <code>propagate_const</code>, default-initializing <span class="t-c"><span class="mw-geshi cpp source-cpp">this<span class="sy2">-</span><span class="sy1">></span>t_</span></span>.
</p><p>2) Explicitly defaulted move constructor that move constructs <span class="t-c"><span class="mw-geshi cpp source-cpp">this<span class="sy2">-</span><span class="sy1">></span>t_</span></span> from <span class="t-c"><span class="mw-geshi cpp source-cpp">p.<span class="me1">t_</span></span></span>.
</p><p>3) Initializes <span class="t-c"><span class="mw-geshi cpp source-cpp">this<span class="sy2">-</span><span class="sy1">></span>t_</span></span> as if by direct-non-list-initialization from the expression <span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>pu.<span class="me1">t_</span><span class="br0">)</span></span></span>
</p><p>This constructor does not participate in overload resolution unless <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../../types/is_constructible.html"><span class="kw520">std::<span class="me2">is_constructible</span></span></a><span class="sy1"><</span>T, U<span class="sy3">&&</span><span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span></span></span> is <code>true</code>, and is <code>explicit</code> if and only if <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../../types/is_convertible.html"><span class="kw592">std::<span class="me2">is_convertible</span></span></a><span class="sy1"><</span>U<span class="sy3">&&</span>, T<span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span></span></span> is <code>false</code>.
</p><p>4) Initializes <span class="t-c"><span class="mw-geshi cpp source-cpp">this<span class="sy2">-</span><span class="sy1">></span>t_</span></span> as if by direct-non-list-initialization with the expression <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../../utility/forward.html"><span class="kw1114">std::<span class="me2">forward</span></span></a><span class="sy1"><</span>U<span class="sy1">></span><span class="br0">(</span>u<span class="br0">)</span></span></span>.
</p><p>This constructor does not participate in overload resolution unless <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../../types/is_constructible.html"><span class="kw520">std::<span class="me2">is_constructible</span></span></a><span class="sy1"><</span>T, U<span class="sy3">&&</span><span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span></span></span> is <code>true</code> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../../types/decay.html"><span class="kw629">std::<span class="me2">decay_t</span></span></a><span class="sy1"><</span>U<span class="sy1">></span></span></span> is not a specialization of <code>propagate_const</code>. This constructor is <code>explicit</code> if and only if <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../../types/is_convertible.html"><span class="kw592">std::<span class="me2">is_convertible</span></span></a><span class="sy1"><</span>U<span class="sy3">&&</span>, T<span class="sy1">></span><span class="sy4">::</span><span class="me2">value</span></span></span> is <code>false</code>.
</p><p>5) Copy constructor is explicitly deleted.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/experimental/propagate_const/propagate_const&action=edit&section=1" title="Edit section: Parameters">edit</a>]</span> <span class="mw-headline" id="Parameters">Parameters</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td> p
</td>
<td> -
</td>
<td> another <code>propagate_const</code> object to move from
</td></tr>
<tr class="t-par">
<td> pu
</td>
<td> -
</td>
<td> another <code>propagate_const</code> object of a different specialization to move from
</td></tr>
<tr class="t-par">
<td> u
</td>
<td> -
</td>
<td> another object to initialize the contained pointer with
</td></tr></table>
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