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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../utility/piecewise_construct.html" title="cpp/utility/piecewise construct"><span class="t-lines"><span>piecewise_construct</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../utility/integer_sequence.html" title="cpp/utility/integer sequence"><span class="t-lines"><span>integer_sequence</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Swap, forward and move</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../algorithm/swap.html" title="cpp/algorithm/swap"><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="../../utility/exchange.html" title="cpp/utility/exchange"><span class="t-lines"><span>exchange</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../utility/forward.html" title="cpp/utility/forward"><span class="t-lines"><span>forward</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../utility/move.html" title="cpp/utility/move"><span class="t-lines"><span>move</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../utility/move_if_noexcept.html" title="cpp/utility/move if noexcept"><span class="t-lines"><span>move_if_noexcept</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Type operations</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../utility/declval.html" title="cpp/utility/declval"><span class="t-lines"><span>declval</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../../utility/as_const.html" title="cpp/utility/as const"><span class="t-lines"><span>as_const</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
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<tr class="t-nv-h1"><td colspan="5"> Smart pointers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../unique_ptr.html" title="cpp/memory/unique ptr"><span class="t-lines"><span>unique_ptr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../shared_ptr.html" title="cpp/memory/shared ptr"><span class="t-lines"><span>shared_ptr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../weak_ptr.html" title="cpp/memory/weak ptr"><span class="t-lines"><span>weak_ptr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../auto_ptr.html" title="cpp/memory/auto ptr"><span class="t-lines"><span>auto_ptr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-until-cxx17">(until C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../owner_less.html" title="cpp/memory/owner less"><span class="t-lines"><span>owner_less</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../enable_shared_from_this.html" title="cpp/memory/enable shared from this"><span class="t-lines"><span>enable_shared_from_this</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../bad_weak_ptr.html" title="cpp/memory/bad weak ptr"><span class="t-lines"><span>bad_weak_ptr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../default_delete.html" title="cpp/memory/default delete"><span class="t-lines"><span>default_delete</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Allocators</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../allocator.html" title="cpp/memory/allocator"><span class="t-lines"><span>allocator</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../allocator_traits.html" title="cpp/memory/allocator traits"><span class="t-lines"><span>allocator_traits</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../allocator_arg_t.html" title="cpp/memory/allocator arg t"><span class="t-lines"><span>allocator_arg_t</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../allocator_arg.html" title="cpp/memory/allocator arg"><span class="t-lines"><span>allocator_arg</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../uses_allocator.html" title="cpp/memory/uses allocator"><span class="t-lines"><span>uses_allocator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../scoped_allocator_adaptor.html" title="cpp/memory/scoped allocator adaptor"><span class="t-lines"><span>scoped_allocator_adaptor</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Uninitialized storage</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../uninitialized_copy.html" title="cpp/memory/uninitialized copy"><span class="t-lines"><span>uninitialized_copy</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../uninitialized_copy_n.html" title="cpp/memory/uninitialized copy n"><span class="t-lines"><span>uninitialized_copy_n</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../uninitialized_fill.html" title="cpp/memory/uninitialized fill"><span class="t-lines"><span>uninitialized_fill</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../uninitialized_fill_n.html" title="cpp/memory/uninitialized fill n"><span class="t-lines"><span>uninitialized_fill_n</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../raw_storage_iterator.html" title="cpp/memory/raw storage iterator"><span class="t-lines"><span>raw_storage_iterator</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../get_temporary_buffer.html" title="cpp/memory/get temporary buffer"><span class="t-lines"><span>get_temporary_buffer</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../return_temporary_buffer.html" title="cpp/memory/return temporary buffer"><span class="t-lines"><span>return_temporary_buffer</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Garbage collection support</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../gc/declare_reachable.html" title="cpp/memory/gc/declare reachable"><span class="t-lines"><span>declare_reachable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../gc/undeclare_reachable.html" title="cpp/memory/gc/undeclare reachable"><span class="t-lines"><span>undeclare_reachable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../gc/declare_no_pointers.html" title="cpp/memory/gc/declare no pointers"><span class="t-lines"><span>declare_no_pointers</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../gc/undeclare_no_pointers.html" title="cpp/memory/gc/undeclare no pointers"><span class="t-lines"><span>undeclare_no_pointers</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../gc/pointer_safety.html" title="cpp/memory/gc/pointer safety"><span class="t-lines"><span>pointer_safety</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../gc/get_pointer_safety.html" title="cpp/memory/gc/get pointer safety"><span class="t-lines"><span>get_pointer_safety</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Miscellaneous</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../pointer_traits.html" title="cpp/memory/pointer traits"><span class="t-lines"><span>pointer_traits</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../addressof.html" title="cpp/memory/addressof"><span class="t-lines"><span>addressof</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../align.html" title="cpp/memory/align"><span class="t-lines"><span>align</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> <a href="../c.html" title="cpp/memory/c">C Library</a></td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../c/malloc.html" title="cpp/memory/c/malloc"><span class="t-lines"><span>malloc</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../c/calloc.html" title="cpp/memory/c/calloc"><span class="t-lines"><span>calloc</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../c/realloc.html" title="cpp/memory/c/realloc"><span class="t-lines"><span>realloc</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../c/free.html" title="cpp/memory/c/free"><span class="t-lines"><span>free</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> <a href="../new.1.html" title="cpp/memory/new">Low level memory management</a></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/memory/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><a href="../shared_ptr.html" title="cpp/memory/shared ptr"><tt>std::shared_ptr</tt></a><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h1"><td colspan="5"> Member functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="shared_ptr.html" title="cpp/memory/shared ptr/shared ptr"><span class="t-lines"><span>shared_ptr::shared_ptr</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="~shared_ptr.html" title="cpp/memory/shared ptr/~shared ptr"><span class="t-lines"><span>shared_ptr::~shared_ptr</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator=.html" title="cpp/memory/shared ptr/operator="><span class="t-lines"><span>shared_ptr::operator=</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Modifiers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>shared_ptr::reset</span></span></strong></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="swap.html" title="cpp/memory/shared ptr/swap"><span class="t-lines"><span>shared_ptr::swap</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Observers</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="get.html" title="cpp/memory/shared ptr/get"><span class="t-lines"><span>shared_ptr::get</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator*.html" title="cpp/memory/shared ptr/operator*"><span class="t-lines"><span>shared_ptr::operator*</span><span>shared_ptr::operator-></span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="use_count.html" title="cpp/memory/shared ptr/use count"><span class="t-lines"><span>shared_ptr::use_count</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="unique.html" title="cpp/memory/shared ptr/unique"><span class="t-lines"><span>shared_ptr::unique</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator_bool.html" title="cpp/memory/shared ptr/operator bool"><span class="t-lines"><span>shared_ptr::operator bool</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="owner_before.html" title="cpp/memory/shared ptr/owner before"><span class="t-lines"><span>shared_ptr::owner_before</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Non-member functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="swap2.html" title="cpp/memory/shared ptr/swap2"><span class="t-lines"><span>std::swap</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="make_shared.html" title="cpp/memory/shared ptr/make shared"><span class="t-lines"><span>make_shared</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="allocate_shared.html" title="cpp/memory/shared ptr/allocate shared"><span class="t-lines"><span>allocate_shared</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="pointer_cast.html" title="cpp/memory/shared ptr/pointer cast"><span class="t-lines"><span>static_pointer_cast</span><span>dynamic_pointer_cast</span><span>const_pointer_cast</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="get_deleter.html" title="cpp/memory/shared ptr/get deleter"><span class="t-lines"><span>get_deleter</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator_cmp.html" title="cpp/memory/shared ptr/operator cmp"><span class="t-lines"><span>operator==</span><span>operator|=</span><span>operator<</span><span>operator<=</span><span>operator></span><span>operator>=</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator_ltlt.html" title="cpp/memory/shared ptr/operator ltlt"><span class="t-lines"><span>operator<<</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="atomic.html" title="cpp/memory/shared ptr/atomic"><span class="t-lines"><span>atomic_is_lock_free</span><span>atomic_load</span><span>atomic_load_explicit</span><span>atomic_store</span><span>atomic_store_explicit</span><span>atomic_exchange</span><span>atomic_exchange_explicit</span><span>atomic_compare_exchange_weak</span><span>atomic_compare_exchange_strong</span><span>atomic_compare_exchange_weak_explicit</span><span>atomic_compare_exchange_strong_explicit</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="hash.html" title="cpp/memory/shared ptr/hash"><span class="t-lines"><span>std::hash</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/memory/shared_ptr/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-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> reset<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (1) </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> Y <span class="sy1">></span> <br />
<span class="kw4">void</span> reset<span class="br0">(</span> Y<span class="sy2">*</span> ptr <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (2) </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> Y, <span class="kw1">class</span> Deleter <span class="sy1">></span> <br />
<span class="kw4">void</span> reset<span class="br0">(</span> Y<span class="sy2">*</span> ptr, Deleter d <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (3) </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> Y, <span class="kw1">class</span> Deleter, <span class="kw1">class</span> Alloc <span class="sy1">></span> <br />
<span class="kw4">void</span> reset<span class="br0">(</span> Y<span class="sy2">*</span> ptr, Deleter d, Alloc alloc <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (4) </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>Replaces the managed object with an object pointed to by <code>ptr</code>. Optional deleter <code>d</code> can be supplied, which is later used to destroy the new object when no <code>shared_ptr</code> objects own it. By default, <a href="../../language/delete.html" title="cpp/language/delete"><tt>delete</tt></a> expression is used as deleter. Proper <a href="../../language/delete.html" title="cpp/language/delete"><tt>delete</tt></a> expression corresponding to the supplied type is always selected, this is the reason why the function is implemented as template using a separate parameter <code>Y</code>.
</p><p>If <code>*this</code> already owns an object and it is the last <code>shared_ptr</code> owning it, the object is destroyed through the owned deleter.
</p><p>If the object pointed to by <code>ptr</code> is already owned, the function results in undefined behavior.
</p>
<div class="t-li1"><span class="t-li">1)</span> Releases the ownership of the managed object, if any. After the call, <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> manages no object. Equivalent to <span class="t-c"><span class="mw-geshi cpp source-cpp">shared_ptr<span class="br0">(</span><span class="br0">)</span>.<span class="me1">swap</span><span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span><span class="sy4">;</span></span></span></div>
<div class="t-li1"><span class="t-li">2-4)</span> Replaces the managed object with an object pointed to by <code>ptr</code>. <code>Y</code> must be a complete type and implicitly convertible to <code>T</code>. Additionally:</div>
<div class="t-li2"><span class="t-li">2)</span> Uses the delete expression as the deleter. A valid delete expression must be available, i.e. <span class="t-c"><span class="mw-geshi cpp source-cpp">delete ptr</span></span> must be well formed, have well-defined behavior and not throw any exceptions. Equivalent to <span class="t-c"><span class="mw-geshi cpp source-cpp">shared_ptr<span class="sy1"><</span>T<span class="sy1">></span><span class="br0">(</span>ptr<span class="br0">)</span>.<span class="me1">swap</span><span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span><span class="sy4">;</span></span></span>.</div>
<div class="t-li2"><span class="t-li">3)</span> Uses the specified deleter <code>d</code> as the deleter. <code>Deleter</code> must be callable for the type <code>T</code>, i.e. <span class="t-c"><span class="mw-geshi cpp source-cpp">d<span class="br0">(</span>ptr<span class="br0">)</span></span></span> must be well formed, have well-defined behavior and not throw any exceptions. <code>Deleter</code> must be <a href="../../concept/CopyConstructible.html" title="cpp/concept/CopyConstructible"><code>CopyConstructible</code></a>, and its copy constructor and destructor must not throw exceptions. Equivalent to <span class="t-c"><span class="mw-geshi cpp source-cpp">shared_ptr<span class="sy1"><</span>T<span class="sy1">></span><span class="br0">(</span>ptr, d<span class="br0">)</span>.<span class="me1">swap</span><span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span><span class="sy4">;</span></span></span>.</div>
<div class="t-li2"><span class="t-li">4)</span> Same as <span class="t-v">(3)</span>, but additionally uses a copy of <code>alloc</code> for allocation of data for internal use. <code>Alloc</code> must be a <a href="../../concept/Allocator.html" title="cpp/concept/Allocator"><code>Allocator</code></a>. The copy constructor and destructor must not throw exceptions. Equivalent to <span class="t-c"><span class="mw-geshi cpp source-cpp">shared_ptr<span class="sy1"><</span>T<span class="sy1">></span><span class="br0">(</span>ptr, d, alloc<span class="br0">)</span>.<span class="me1">swap</span><span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span><span class="sy4">;</span></span></span>.</div>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="reset.html#Parameters"><span class="tocnumber">1</span> <span class="toctext">Parameters</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="reset.html#Return_value"><span class="tocnumber">2</span> <span class="toctext">Return value</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="reset.html#Exceptions"><span class="tocnumber">3</span> <span class="toctext">Exceptions</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="reset.html#Example"><span class="tocnumber">4</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-1 tocsection-5"><a href="reset.html#See_also"><span class="tocnumber">5</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/memory/shared_ptr/reset&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> ptr
</td>
<td> -
</td>
<td> pointer to an object to acquire ownership of
</td></tr>
<tr class="t-par">
<td> d
</td>
<td> -
</td>
<td> deleter to store for deletion of the object
</td></tr>
<tr class="t-par">
<td> alloc
</td>
<td> -
</td>
<td> allocator to use for internal allocations
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/memory/shared_ptr/reset&action=edit&section=2" title="Edit section: Return value">edit</a>]</span> <span class="mw-headline" id="Return_value">Return value</span></h3>
<p>(none)
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/memory/shared_ptr/reset&action=edit&section=3" title="Edit section: Exceptions">edit</a>]</span> <span class="mw-headline" id="Exceptions">Exceptions</span></h3>
<div class="t-li1"><span class="t-li">1)</span> <div class="t-noexcept-inline"><a href="../../language/noexcept_spec.html" title="cpp/language/noexcept spec"><tt>noexcept</tt></a> specification:  <div class="t-noexcept-box"><span class="t-cc"><span class="mw-geshi cpp source-cpp"><span class="kw1">noexcept</span></span></span></div>  </div></div>
<div class="t-li1"><span class="t-li">2)</span> <span class="t-lc"><a href="../new/bad_alloc.html" title="cpp/memory/new/bad alloc">std::bad_alloc</a></span> if required additional memory could not be obtained. May throw implementation-defined exception for other errors. <span class="t-c"><span class="mw-geshi cpp source-cpp">delete ptr</span></span> is called if an exception occurs.</div>
<div class="t-li1"><span class="t-li">3-4)</span> <span class="t-lc"><a href="../new/bad_alloc.html" title="cpp/memory/new/bad alloc">std::bad_alloc</a></span> if required additional memory could not be obtained. May throw implementation-defined exception for other errors. <span class="t-c"><span class="mw-geshi cpp source-cpp">d<span class="br0">(</span>ptr<span class="br0">)</span></span></span> is called if an exception occurs.</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/memory/shared_ptr/reset&action=edit&section=4" title="Edit section: Example">edit</a>]</span> <span class="mw-headline" id="Example">Example</span></h3>
<div class="t-example"><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">Run this code</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="co2">#include <memory></span>
<span class="co2">#include <iostream></span>
 
<span class="kw1">struct</span> Foo <span class="br0">{</span>
Foo<span class="br0">(</span><span class="kw4">int</span> n <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw1">noexcept</span> <span class="sy4">:</span> bar<span class="br0">(</span>n<span class="br0">)</span> <span class="br0">{</span>
<a href="../../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Foo: constructor, bar = "</span> <span class="sy1"><<</span> bar <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
<span class="br0">}</span>
~Foo<span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span>
<a href="../../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Foo: destructor, bar = "</span> <span class="sy1"><<</span> bar <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">int</span> getBar<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span> <span class="br0">{</span> <span class="kw1">return</span> bar<span class="sy4">;</span> <span class="br0">}</span>
<span class="kw1">private</span><span class="sy4">:</span>
<span class="kw4">int</span> bar<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
 
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="../shared_ptr.html"><span class="kw615">std::<span class="me2">shared_ptr</span></span></a><span class="sy1"><</span>Foo<span class="sy1">></span> sptr <span class="sy1">=</span> <a href="make_shared.html"><span class="kw617">std::<span class="me2">make_shared</span></span></a><span class="sy1"><</span>Foo<span class="sy1">></span><span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
<a href="../../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"The first Foo's bar is "</span> <span class="sy1"><<</span> sptr<span class="sy2">-</span><span class="sy1">></span>getBar<span class="br0">(</span><span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">"<span class="es1">\n</span>"</span><span class="sy4">;</span>
 
<span class="co1">// reset the shared_ptr, hand it a fresh instance of Foo</span>
<span class="co1">// (the old instance will be destroyed after this call)</span>
sptr.<span class="me1">reset</span><span class="br0">(</span>new Foo<span class="br0">)</span><span class="sy4">;</span>
<a href="../../io/cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"The second Foo's bar is "</span> <span class="sy1"><<</span> sptr<span class="sy2">-</span><span class="sy1">></span>getBar<span class="br0">(</span><span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">"<span class="es1">\n</span>"</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<p>Output:
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">Foo: constructor, bar = 1
The first Foo's bar is 1
Foo: constructor, bar = 0
Foo: destructor, bar = 1
The second Foo's bar is 0
Foo: destructor, bar = 0</pre></div></div>
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/memory/shared_ptr/reset&action=edit&section=5" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div t-dsc-member-nobold-div"><div><a href="shared_ptr.html" title="cpp/memory/shared ptr/shared ptr"> <span class="t-lines"><span>(constructor)</span></span></a></div></div>
</td>
<td> constructs new <code>shared_ptr</code> <br /> <span class="t-mark">(public member function)</span> <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/memory/shared_ptr/dsc_constructor&action=edit">[edit]</a></span>
</td></tr>
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