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<title>std::messages&lt;CharT&gt;::get, std::messages&lt;CharT&gt;::do_get</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::messages&lt;CharT&gt;::</span>get, <span style="font-size:0.7em; line-height:130%">std::messages&lt;CharT&gt;::</span>do_get</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-locale.html">locale</a>&lrm; | <a href="cpp-locale-messages.html">messages</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-locale.html">&lt;locale&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">public</span><span class="sy4">:</span><br />
string_type get<span class="br0">(</span> catalog cat, <span class="kw4">int</span> set, <span class="kw4">int</span> msgid, <span class="kw4">const</span> string_type<span class="sy3">&amp;</span> dfault <span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">protected</span><span class="sy4">:</span><br />
<span class="kw1">virtual</span> string_type do_get<span class="br0">(</span> catalog cat, <span class="kw4">int</span> set, <span class="kw4">int</span> msgid, <span class="kw4">const</span> string_type<span class="sy3">&amp;</span> dfault <span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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<p>1) &#20844;&#24320;&#25104;&#21592;&#20989;&#25968;&#65292;&#35843;&#29992;&#26368;&#32456;&#23548;&#20986;&#31867;&#30340;&#21463;&#20445;&#25252;&#34394;&#25104;&#21592;&#20989;&#25968; <code>do_get</code> &#12290;</p>
<p>2) &#29992;&#20540; <code>set</code> &#12289; <code>msgid</code> &#21644; <code>dfault</code> &#65292;&#20197;&#23454;&#29616;&#23450;&#20041;&#26041;&#24335;&#20174;&#25171;&#24320;&#30340;&#28040;&#24687;&#30446;&#24405; <code>cat</code> &#33719;&#24471;&#28040;&#24687;&#12290;&#33509;&#30446;&#24405;&#20013;&#25214;&#19981;&#21040;&#26399;&#24453; &#28040;&#24687;&#65292;&#21017;&#36820;&#22238; <code>dfault</code> &#30340;&#21103;&#26412;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>cat</td>
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<td>&#20174; <span class="t-lc"><a href="cpp-locale-messages-open.html">open()</a></span> &#33719;&#24471;&#19988;&#20173;&#26410;&#20256;&#36882;&#32473; <span class="t-lc"><a href="cpp-locale-messages-close.html">close()</a></span> &#30340;&#26631;&#35782;&#31526;</td>
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<td>set</td>
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<td>&#23454;&#29616;&#23450;&#20041;&#21442;&#25968;&#65292; POSIX &#20013;&#20026;&#28040;&#24687;&#38598;</td>
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<td>msgid</td>
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<td>&#23454;&#29616;&#23450;&#20041;&#21442;&#25968;&#65292; POSIX &#20013;&#20026;&#28040;&#24687;&#26631;&#35782;</td>
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<td>dfault</td>
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<td>&#35201;&#22312;&#30446;&#24405;&#20013;&#26597;&#25214;&#30340;&#23383;&#31526;&#20018;&#65288;&#33509;&#30446;&#24405;&#20351;&#29992;&#23383;&#31526;&#20018;&#26597;&#25214;&#65289;&#65292;&#20134;&#20026;&#22833;&#36133;&#24773;&#20917;&#19979;&#36820;&#22238;&#30340;&#23383;&#31526;&#20018;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#26469;&#33258;&#30446;&#24405;&#30340;&#28040;&#24687;&#65292;&#25110;&#33509;&#25214;&#19981;&#21040;&#28040;&#24687;&#21017;&#20026; <code>dfault</code> &#30340;&#21103;&#26412;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>POSIX &#31995;&#32479;&#19978;&#65292;&#27492;&#20989;&#25968;&#35843;&#29992;&#36890;&#24120;&#34987;&#32763;&#35793;&#20026;&#23545; <code><a rel="nofollow" class="external text" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/catgets.html">catgets()</a></code> &#30340;&#35843;&#29992;&#65292;&#24182;&#21407;&#24577;&#20256;&#36882;&#21442;&#25968; <code>set</code> &#12289; <code>msgid</code> &#21644; <code>dfault</code> &#32473; <code>catgets()</code> &#12290; GNU libstdc++ &#20013;&#65292;&#27492;&#20989;&#25968;&#24573;&#30053; <code>set</code> &#21644; <code>msgid</code> &#65292;&#24182;&#31616;&#21333;&#22320;&#22312;&#35201;&#27714;&#30340;&#26412;&#22320;&#29615;&#22659;&#20013;&#35843;&#29992; GNU <code>gettext(dfault)</code> &#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<p>&#19979;&#21015;&#20195;&#30721;&#28436;&#31034;&#28040;&#24687;&#21462;&#24471;&#65306;&#20856;&#22411;&#30340; GNU/Linux &#19978;&#65292;&#23427;&#20174; <code>/usr/share/locale/de/LC_MESSAGES/sed.mo</code> &#35835;&#21462;</p>
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<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;locale&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-locale-locale.html"><span class="kw1894">std::<span class="me2">locale</span></span></a> loc<span class="br0">(</span><span class="st0">&quot;de_DE.utf8&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a>.<span class="me1">imbue</span><span class="br0">(</span>loc<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">auto</span><span class="sy3">&amp;</span> facet <span class="sy1">=</span> <a href="cpp-locale-use_facet.html"><span class="kw1897">std::<span class="me2">use_facet</span></span></a><span class="sy1">&lt;</span><a href="cpp-locale-messages.html"><span class="kw1946">std::<span class="me2">messages</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;&gt;</span><span class="br0">(</span>loc<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">auto</span> cat <span class="sy1">=</span> facet.<span class="me1">open</span><span class="br0">(</span><span class="st0">&quot;sed&quot;</span>, loc<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span><span class="br0">(</span>cat <span class="sy1">&lt;</span> <span class="nu0">0</span> <span class="br0">)</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Could not open german <span class="es1">\&quot;</span>sed<span class="es1">\&quot;</span> message catalog<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="kw1">else</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\&quot;</span>No match<span class="es1">\&quot;</span> in German: &quot;</span>
<span class="sy1">&lt;&lt;</span> facet.<span class="me1">get</span><span class="br0">(</span>cat, <span class="nu0">0</span>, <span class="nu0">0</span>, <span class="st0">&quot;No match&quot;</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\&quot;</span>Memory exhausted<span class="es1">\&quot;</span> in German: &quot;</span>
<span class="sy1">&lt;&lt;</span> facet.<span class="me1">get</span><span class="br0">(</span>cat, <span class="nu0">0</span>, <span class="nu0">0</span>, <span class="st0">&quot;Memory exhausted&quot;</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
facet.<span class="me1">close</span><span class="br0">(</span>cat<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
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<pre class="de1">&quot;No match&quot; in German: Keine &Uuml;bereinstimmung
&quot;Memory exhausted&quot; in German: Speicher ersch&ouml;pft</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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