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<title>libstdc++: std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc > Class Template Reference</title>
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<div class="title">std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc > Class Template Reference<div class="ingroups"><a class="el" href="a01492.html">Locales</a></div></div> </div>
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Public Types</h2></td></tr>
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typedef <a class="el" href="a04771.html">basic_string</a>< char, <a class="el" href="a05111.html">char_traits</a>< char >, _Byte_alloc > </td><td class="memItemRight" valign="bottom"><b>byte_string</b></td></tr>
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typedef wide_string::traits_type::int_type </td><td class="memItemRight" valign="bottom"><b>int_type</b></td></tr>
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typedef _Codecvt::state_type </td><td class="memItemRight" valign="bottom"><b>state_type</b></td></tr>
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typedef <a class="el" href="a04771.html">basic_string</a>< _Elem, <a class="el" href="a05111.html">char_traits</a>< _Elem >, _Wide_alloc > </td><td class="memItemRight" valign="bottom"><b>wide_string</b></td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:ae3631014b5f2535fb0efa101fbc7193e"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#ae3631014b5f2535fb0efa101fbc7193e">wstring_convert</a> (_Codecvt *__pcvt=new _Codecvt())</td></tr>
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<tr class="memitem:ac63cbe7aac1dc89a72e1e40134545d41"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#ac63cbe7aac1dc89a72e1e40134545d41">wstring_convert</a> (_Codecvt *__pcvt, state_type __state)</td></tr>
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<tr class="memitem:aa7882cf7b53baff7d6d2cf9ca3386b3a"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#aa7882cf7b53baff7d6d2cf9ca3386b3a">wstring_convert</a> (const <a class="el" href="a04771.html">byte_string</a> &__byte_err, const <a class="el" href="a04771.html">wide_string</a> &__wide_err=<a class="el" href="a04771.html">wide_string</a>())</td></tr>
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 </td><td class="memItemRight" valign="bottom"><b>wstring_convert</b> (const <a class="el" href="a05843.html">wstring_convert</a> &)=delete</td></tr>
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<tr class="memitem:a06c03e1e866769c8165776f85cc02fb7"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#a06c03e1e866769c8165776f85cc02fb7">converted</a> () const noexcept</td></tr>
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<a class="el" href="a05843.html">wstring_convert</a> & </td><td class="memItemRight" valign="bottom"><b>operator=</b> (const <a class="el" href="a05843.html">wstring_convert</a> &)=delete</td></tr>
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<tr class="memitem:abd1382f21442adec3f9935d023017871"><td class="memItemLeft" align="right" valign="top">state_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#abd1382f21442adec3f9935d023017871">state</a> () const</td></tr>
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<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr class="memitem:a5adef5a1030829016c2afe669a5d335f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a04771.html">wide_string</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#a5adef5a1030829016c2afe669a5d335f">from_bytes</a> (char __byte)</td></tr>
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<tr class="memitem:abd8e388d1f5e74cfaf824f8971bfb6dd"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a04771.html">wide_string</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#abd8e388d1f5e74cfaf824f8971bfb6dd">from_bytes</a> (const char *__ptr)</td></tr>
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<tr class="memitem:af35796c796e1d9df713e0dd9fafea066"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a04771.html">wide_string</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#af35796c796e1d9df713e0dd9fafea066">from_bytes</a> (const <a class="el" href="a04771.html">byte_string</a> &__str)</td></tr>
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<tr class="memitem:ab1176fe15be7975d9e57184c8d8d7e3e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a04771.html">wide_string</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#ab1176fe15be7975d9e57184c8d8d7e3e">from_bytes</a> (const char *__first, const char *__last)</td></tr>
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<tr class="memitem:a5ea01f210ea99aee4fe16eb79b5a5460"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a04771.html">byte_string</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#a5ea01f210ea99aee4fe16eb79b5a5460">to_bytes</a> (_Elem __wchar)</td></tr>
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<tr class="memitem:a9112609c7da47cc6ec1d285d3c3a3498"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a04771.html">byte_string</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05843.html#a9112609c7da47cc6ec1d285d3c3a3498">to_bytes</a> (const <a class="el" href="a04771.html">wide_string</a> &__wstr)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<typename _Codecvt, typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>><br />
class std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc ></h3>
<p>String conversions. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00169">169</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="ae3631014b5f2535fb0efa101fbc7193e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae3631014b5f2535fb0efa101fbc7193e">◆ </a></span>wstring_convert() <span class="overload">[1/3]</span></h2>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::<a class="el" href="a05843.html">wstring_convert</a> </td>
<td>(</td>
<td class="paramtype">_Codecvt * </td>
<td class="paramname"><em>__pcvt</em> = <code>new _Codecvt()</code></td><td>)</td>
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<p>Default constructor.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__pcvt</td><td>The facet to use for conversions.</td></tr>
</table>
</dd>
</dl>
<p>Takes ownership of <code>__pcvt</code> and will delete it in the destructor. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00184">184</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
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<a id="ac63cbe7aac1dc89a72e1e40134545d41"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac63cbe7aac1dc89a72e1e40134545d41">◆ </a></span>wstring_convert() <span class="overload">[2/3]</span></h2>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::<a class="el" href="a05843.html">wstring_convert</a> </td>
<td>(</td>
<td class="paramtype">_Codecvt * </td>
<td class="paramname"><em>__pcvt</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">state_type </td>
<td class="paramname"><em>__state</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Construct with an initial converstion state.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__pcvt</td><td>The facet to use for conversions. </td></tr>
<tr><td class="paramname">__state</td><td>Initial conversion state.</td></tr>
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</dd>
</dl>
<p>Takes ownership of <code>__pcvt</code> and will delete it in the destructor. The object's conversion state will persist between conversions. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00198">198</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::<a class="el" href="a05843.html">wstring_convert</a> </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="a04771.html">byte_string</a> & </td>
<td class="paramname"><em>__byte_err</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const <a class="el" href="a04771.html">wide_string</a> & </td>
<td class="paramname"><em>__wide_err</em> = <code><a class="el" href="a04771.html">wide_string</a>()</code> </td>
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<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Construct with error strings.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__byte_err</td><td>A string to return on failed conversions. </td></tr>
<tr><td class="paramname">__wide_err</td><td>A wide string to return on failed conversions. </td></tr>
</table>
</dd>
</dl>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00211">211</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a06c03e1e866769c8165776f85cc02fb7">◆ </a></span>converted()</h2>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname">size_t <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::converted </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>The number of elements successfully converted in the last conversion. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00301">301</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">wide_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::from_bytes </td>
<td>(</td>
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<td class="paramname"><em>__byte</em></td><td>)</td>
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<p>Convert from bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00230">230</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">Referenced by <a class="el" href="a00398_source.html#l00237">std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::from_bytes()</a>.</p>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">wide_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::from_bytes </td>
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<p>Convert from bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00237">237</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">References <a class="el" href="a00398_source.html#l00230">std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::from_bytes()</a>.</p>
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<a id="af35796c796e1d9df713e0dd9fafea066"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af35796c796e1d9df713e0dd9fafea066">◆ </a></span>from_bytes() <span class="overload">[3/4]</span></h2>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">wide_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::from_bytes </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="a04771.html">byte_string</a> & </td>
<td class="paramname"><em>__str</em></td><td>)</td>
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<p>Convert from bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00241">241</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">References <a class="el" href="a00290_source.html#l05140">std::basic_string< _CharT, _Traits, _Alloc >::data()</a>, <a class="el" href="a00398_source.html#l00230">std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::from_bytes()</a>, and <a class="el" href="a00290_source.html#l03835">std::basic_string< _CharT, _Traits, _Alloc >::size()</a>.</p>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">wide_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::from_bytes </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>__first</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const char * </td>
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<p>Convert from bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00248">248</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">References <a class="el" href="a00290_source.html#l05162">std::basic_string< _CharT, _Traits, _Alloc >::get_allocator()</a>.</p>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname">state_type <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::state </td>
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<p>The final conversion state of the last conversion. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00304">304</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">byte_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::to_bytes </td>
<td>(</td>
<td class="paramtype">_Elem </td>
<td class="paramname"><em>__wchar</em></td><td>)</td>
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<p>Convert to bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00264">264</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">Referenced by <a class="el" href="a00398_source.html#l00271">std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::to_bytes()</a>.</p>
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<a id="a7a955d4914f3262ae49ad762c63e54ca"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7a955d4914f3262ae49ad762c63e54ca">◆ </a></span>to_bytes() <span class="overload">[2/4]</span></h2>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">byte_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::to_bytes </td>
<td>(</td>
<td class="paramtype">const _Elem * </td>
<td class="paramname"><em>__ptr</em></td><td>)</td>
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<p>Convert to bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00271">271</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">References <a class="el" href="a00398_source.html#l00264">std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::to_bytes()</a>.</p>
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<a id="a9112609c7da47cc6ec1d285d3c3a3498"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a9112609c7da47cc6ec1d285d3c3a3498">◆ </a></span>to_bytes() <span class="overload">[3/4]</span></h2>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">byte_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::to_bytes </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="a04771.html">wide_string</a> & </td>
<td class="paramname"><em>__wstr</em></td><td>)</td>
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<p>Convert to bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00277">277</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">References <a class="el" href="a00290_source.html#l05140">std::basic_string< _CharT, _Traits, _Alloc >::data()</a>, <a class="el" href="a00290_source.html#l03835">std::basic_string< _CharT, _Traits, _Alloc >::size()</a>, and <a class="el" href="a00398_source.html#l00264">std::wstring_convert< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::to_bytes()</a>.</p>
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<a id="aa74109db15f1b0b78ac63ef3ed9693f7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa74109db15f1b0b78ac63ef3ed9693f7">◆ </a></span>to_bytes() <span class="overload">[4/4]</span></h2>
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template<typename _Codecvt , typename _Elem = wchar_t, typename _Wide_alloc = allocator<_Elem>, typename _Byte_alloc = allocator<char>> </div>
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<td class="memname"><a class="el" href="a04771.html">byte_string</a> <a class="el" href="a05843.html">std::wstring_convert</a>< _Codecvt, _Elem, _Wide_alloc, _Byte_alloc >::to_bytes </td>
<td>(</td>
<td class="paramtype">const _Elem * </td>
<td class="paramname"><em>__first</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const _Elem * </td>
<td class="paramname"><em>__last</em> </td>
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<p>Convert to bytes. </p>
<p class="definition">Definition at line <a class="el" href="a00398_source.html#l00284">284</a> of file <a class="el" href="a00398_source.html">locale_conv.h</a>.</p>
<p class="reference">References <a class="el" href="a00290_source.html#l05162">std::basic_string< _CharT, _Traits, _Alloc >::get_allocator()</a>.</p>
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