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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor > Class Template Reference<div class="ingroups"><a class="el" href="a01517.html">Experimental</a> » <a class="el" href="a01518.html">Optional values</a></div></div> </div>
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Public Member Functions</h2></td></tr>
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constexpr </td><td class="memItemRight" valign="bottom"><b>_Optional_base</b> (<a class="el" href="a09999.html">nullopt_t</a>) noexcept</td></tr>
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template<typename... _Args> </td></tr>
<tr class="memitem:a11cb698edef776c53c8c04ca55569706"><td class="memTemplItemLeft" align="right" valign="top">constexpr </td><td class="memTemplItemRight" valign="bottom"><b>_Optional_base</b> (<a class="el" href="a09995.html">in_place_t</a>, _Args &&... __args)</td></tr>
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template<typename _Up , typename... _Args, enable_if_t< is_constructible< _Tp, initializer_list< _Up > &, _Args &&... >::value, int > ...> </td></tr>
<tr class="memitem:ac57b62ecebb108ce4775f73f577f713a"><td class="memTemplItemLeft" align="right" valign="top">constexpr </td><td class="memTemplItemRight" valign="bottom"><b>_Optional_base</b> (<a class="el" href="a09995.html">in_place_t</a>, <a class="el" href="a01655.html">initializer_list</a>< _Up > __il, _Args &&... __args)</td></tr>
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 </td><td class="memItemRight" valign="bottom"><b>_Optional_base</b> (const <a class="el" href="a10027.html">_Optional_base</a> &__other)</td></tr>
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 </td><td class="memItemRight" valign="bottom"><b>_Optional_base</b> (<a class="el" href="a10027.html">_Optional_base</a> &&__other) noexcept(<a class="el" href="a03679.html">is_nothrow_move_constructible</a>< _Tp >())</td></tr>
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<a class="el" href="a10027.html">_Optional_base</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a10027.html">_Optional_base</a> &__other)</td></tr>
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<a class="el" href="a10027.html">_Optional_base</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (<a class="el" href="a10027.html">_Optional_base</a> &&__other) noexcept(__and_< <a class="el" href="a03679.html">is_nothrow_move_constructible</a>< _Tp >, <a class="el" href="a03755.html">is_nothrow_move_assignable</a>< _Tp >>())</td></tr>
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Protected Member Functions</h2></td></tr>
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template<typename... _Args> </td></tr>
<tr class="memitem:a5f7e19fcb7081501ee50aae38d478e61"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><b>_M_construct</b> (_Args &&... __args) noexcept(<a class="el" href="a03647.html">is_nothrow_constructible</a>< _Stored_type, _Args... >())</td></tr>
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void </td><td class="memItemRight" valign="bottom"><b>_M_destruct</b> ()</td></tr>
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constexpr _Tp & </td><td class="memItemRight" valign="bottom"><b>_M_get</b> () noexcept</td></tr>
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constexpr const _Tp & </td><td class="memItemRight" valign="bottom"><b>_M_get</b> () const noexcept</td></tr>
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constexpr bool </td><td class="memItemRight" valign="bottom"><b>_M_is_engaged</b> () const noexcept</td></tr>
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void </td><td class="memItemRight" valign="bottom"><b>_M_reset</b> ()</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<typename _Tp, bool _ShouldProvideDestructor = !is_trivially_destructible<_Tp>::value><br />
class std::experimental::fundamentals_v1::_Optional_base< _Tp, _ShouldProvideDestructor ></h3>
<p>Class template that holds the necessary state for <a class="el" href="a01518.html">Optional values</a> and that has the responsibility for construction and the special members. </p>
<p>Such a separate base class template is necessary in order to conditionally enable the special members (e.g. copy/move constructors). Note that this means that <a class="el" href="a10027.html">_Optional_base</a> implements the functionality for copy and move assignment, but not for converting assignment.</p>
<dl class="section see"><dt>See also</dt><dd>optional, _Enable_special_members </dd></dl>
<p class="definition">Definition at line <a class="el" href="a01010_source.html#l00202">202</a> of file <a class="el" href="a01010_source.html">optional</a>.</p>
</div><hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="a01010_source.html">optional</a></li>
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