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<title>Qpid Proton C++ API: map&lt; K, T &gt;</title>
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&#160;<span id="projectnumber">0.32.0</span>
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<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="classproton_1_1map-members.html">List of all members</a> </div>
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<div class="title">map&lt; K, T &gt;</div> </div>
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<p>A collection of key-value pairs.
<a href="classproton_1_1map.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="map_8hpp_source.html">map.hpp</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a7f35c814c022f4191d359b5dc139d35b"><td class="memItemLeft" align="right" valign="top"><a id="a7f35c814c022f4191d359b5dc139d35b"></a>
&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#a7f35c814c022f4191d359b5dc139d35b">map</a> ()</td></tr>
<tr class="memdesc:a7f35c814c022f4191d359b5dc139d35b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Construct an empty map. <br /></td></tr>
<tr class="separator:a7f35c814c022f4191d359b5dc139d35b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abd67a924a05c8bd5353cd2fa429b5272"><td class="memItemLeft" align="right" valign="top"><a id="abd67a924a05c8bd5353cd2fa429b5272"></a>
&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#abd67a924a05c8bd5353cd2fa429b5272">map</a> (const <a class="el" href="classproton_1_1map.html">map</a> &amp;)</td></tr>
<tr class="memdesc:abd67a924a05c8bd5353cd2fa429b5272"><td class="mdescLeft">&#160;</td><td class="mdescRight">Copy a map. <br /></td></tr>
<tr class="separator:abd67a924a05c8bd5353cd2fa429b5272"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a16a75d371d4e6287b352f5066643f030"><td class="memItemLeft" align="right" valign="top"><a id="a16a75d371d4e6287b352f5066643f030"></a>
<a class="el" href="classproton_1_1map.html">map</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#a16a75d371d4e6287b352f5066643f030">operator=</a> (const <a class="el" href="classproton_1_1map.html">map</a> &amp;)</td></tr>
<tr class="memdesc:a16a75d371d4e6287b352f5066643f030"><td class="mdescLeft">&#160;</td><td class="mdescRight">Copy a map. <br /></td></tr>
<tr class="separator:a16a75d371d4e6287b352f5066643f030"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa4042115b50aa33d3e365ce1e4b254d4"><td class="memItemLeft" align="right" valign="top"><a id="aa4042115b50aa33d3e365ce1e4b254d4"></a>
&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#aa4042115b50aa33d3e365ce1e4b254d4">map</a> (<a class="el" href="classproton_1_1map.html">map</a> &amp;&amp;)</td></tr>
<tr class="memdesc:aa4042115b50aa33d3e365ce1e4b254d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Move a map. <br /></td></tr>
<tr class="separator:aa4042115b50aa33d3e365ce1e4b254d4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab96fb2544d53f9ae42d6950c819d25ef"><td class="memItemLeft" align="right" valign="top"><a id="ab96fb2544d53f9ae42d6950c819d25ef"></a>
<a class="el" href="classproton_1_1map.html">map</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#ab96fb2544d53f9ae42d6950c819d25ef">operator=</a> (<a class="el" href="classproton_1_1map.html">map</a> &amp;&amp;)</td></tr>
<tr class="memdesc:ab96fb2544d53f9ae42d6950c819d25ef"><td class="mdescLeft">&#160;</td><td class="mdescRight">Move a map. <br /></td></tr>
<tr class="separator:ab96fb2544d53f9ae42d6950c819d25ef"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ada6de583b7cdc95792661bcc0ff8a517"><td class="memTemplParams" colspan="2">template&lt;class M &gt; </td></tr>
<tr class="memitem:ada6de583b7cdc95792661bcc0ff8a517"><td class="memTemplItemLeft" align="right" valign="top">assignable_map&lt; M, <a class="el" href="classproton_1_1map.html">map</a> &amp; &gt;::type&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#ada6de583b7cdc95792661bcc0ff8a517">operator=</a> (const M &amp;x)</td></tr>
<tr class="memdesc:ada6de583b7cdc95792661bcc0ff8a517"><td class="mdescLeft">&#160;</td><td class="mdescRight">Type-safe assign from a compatible map, for instance <code>std::map&lt;K,T&gt;</code>. <a href="classproton_1_1map.html#ada6de583b7cdc95792661bcc0ff8a517">More...</a><br /></td></tr>
<tr class="separator:ada6de583b7cdc95792661bcc0ff8a517"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad7e7efff114db20e5786e0ee89a6808a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#ad7e7efff114db20e5786e0ee89a6808a">value</a> (const <a class="el" href="classproton_1_1value.html">value</a> &amp;x)</td></tr>
<tr class="memdesc:ad7e7efff114db20e5786e0ee89a6808a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Copy from a <a class="el" href="classproton_1_1value.html" title="A holder for any AMQP value, simple or complex.">proton::value</a>. <a href="classproton_1_1map.html#ad7e7efff114db20e5786e0ee89a6808a">More...</a><br /></td></tr>
<tr class="separator:ad7e7efff114db20e5786e0ee89a6808a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad5b3d1edb6af3a91c94d7d7b38671336"><td class="memItemLeft" align="right" valign="top"><a id="ad5b3d1edb6af3a91c94d7d7b38671336"></a>
<a class="el" href="classproton_1_1value.html">proton::value</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#ad5b3d1edb6af3a91c94d7d7b38671336">value</a> ()</td></tr>
<tr class="memdesc:ad5b3d1edb6af3a91c94d7d7b38671336"><td class="mdescLeft">&#160;</td><td class="mdescRight">Access as a <a class="el" href="classproton_1_1value.html" title="A holder for any AMQP value, simple or complex.">proton::value</a> containing an AMQP map. <br /></td></tr>
<tr class="separator:ad5b3d1edb6af3a91c94d7d7b38671336"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7644d6a5c6e5a2d7bb8bac2d0111fde1"><td class="memItemLeft" align="right" valign="top"><a id="a7644d6a5c6e5a2d7bb8bac2d0111fde1"></a>
const <a class="el" href="classproton_1_1value.html">proton::value</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#a7644d6a5c6e5a2d7bb8bac2d0111fde1">value</a> () const</td></tr>
<tr class="memdesc:a7644d6a5c6e5a2d7bb8bac2d0111fde1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Access as a <a class="el" href="classproton_1_1value.html" title="A holder for any AMQP value, simple or complex.">proton::value</a> containing an AMQP map. <br /></td></tr>
<tr class="separator:a7644d6a5c6e5a2d7bb8bac2d0111fde1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa5c42da16d5df4154dc8af4c39fbd8e0"><td class="memItemLeft" align="right" valign="top">T&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#aa5c42da16d5df4154dc8af4c39fbd8e0">get</a> (const K &amp;k) const</td></tr>
<tr class="memdesc:aa5c42da16d5df4154dc8af4c39fbd8e0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the map entry for key <code>k</code>. <a href="classproton_1_1map.html#aa5c42da16d5df4154dc8af4c39fbd8e0">More...</a><br /></td></tr>
<tr class="separator:aa5c42da16d5df4154dc8af4c39fbd8e0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac310ae7d64b7ad8a70b200c07a55a736"><td class="memItemLeft" align="right" valign="top"><a id="ac310ae7d64b7ad8a70b200c07a55a736"></a>
void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#ac310ae7d64b7ad8a70b200c07a55a736">put</a> (const K &amp;k, const T &amp;v)</td></tr>
<tr class="memdesc:ac310ae7d64b7ad8a70b200c07a55a736"><td class="mdescLeft">&#160;</td><td class="mdescRight">Put a map entry for key <code>k</code>. <br /></td></tr>
<tr class="separator:ac310ae7d64b7ad8a70b200c07a55a736"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa411e89b8ca1e0107c2e0c5952cf5e5e"><td class="memItemLeft" align="right" valign="top"><a id="aa411e89b8ca1e0107c2e0c5952cf5e5e"></a>
size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#aa411e89b8ca1e0107c2e0c5952cf5e5e">erase</a> (const K &amp;k)</td></tr>
<tr class="memdesc:aa411e89b8ca1e0107c2e0c5952cf5e5e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Erase the map entry at <code>k</code>. <br /></td></tr>
<tr class="separator:aa411e89b8ca1e0107c2e0c5952cf5e5e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aecd4c56a12e62bf5170a3786a94c9210"><td class="memItemLeft" align="right" valign="top"><a id="aecd4c56a12e62bf5170a3786a94c9210"></a>
bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#aecd4c56a12e62bf5170a3786a94c9210">exists</a> (const K &amp;k) const</td></tr>
<tr class="memdesc:aecd4c56a12e62bf5170a3786a94c9210"><td class="mdescLeft">&#160;</td><td class="mdescRight">True if the map has an entry for <code>k</code>. <br /></td></tr>
<tr class="separator:aecd4c56a12e62bf5170a3786a94c9210"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a259cb5a711406a8c3e5d937eb9350cca"><td class="memItemLeft" align="right" valign="top"><a id="a259cb5a711406a8c3e5d937eb9350cca"></a>
size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#a259cb5a711406a8c3e5d937eb9350cca">size</a> () const</td></tr>
<tr class="memdesc:a259cb5a711406a8c3e5d937eb9350cca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the number of map entries. <br /></td></tr>
<tr class="separator:a259cb5a711406a8c3e5d937eb9350cca"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac8bb3912a3ce86b15842e79d0b421204"><td class="memItemLeft" align="right" valign="top"><a id="ac8bb3912a3ce86b15842e79d0b421204"></a>
void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#ac8bb3912a3ce86b15842e79d0b421204">clear</a> ()</td></tr>
<tr class="memdesc:ac8bb3912a3ce86b15842e79d0b421204"><td class="mdescLeft">&#160;</td><td class="mdescRight">Remove all map entries. <br /></td></tr>
<tr class="separator:ac8bb3912a3ce86b15842e79d0b421204"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a644718bb2fb240de962dc3c9a1fdf0dc"><td class="memItemLeft" align="right" valign="top"><a id="a644718bb2fb240de962dc3c9a1fdf0dc"></a>
bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classproton_1_1map.html#a644718bb2fb240de962dc3c9a1fdf0dc">empty</a> () const</td></tr>
<tr class="memdesc:a644718bb2fb240de962dc3c9a1fdf0dc"><td class="mdescLeft">&#160;</td><td class="mdescRight">True if the map has no entries. <br /></td></tr>
<tr class="separator:a644718bb2fb240de962dc3c9a1fdf0dc"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;class K, class T&gt;<br />
class proton::map&lt; K, T &gt;</h3>
<p>A collection of key-value pairs. </p>
<p>Used to access standard AMQP property, annotation, and filter maps attached to <a class="el" href="classproton_1_1message.html" title="An AMQP message.">proton::message</a> and <a class="el" href="classproton_1_1source.html" title="A point of origin for messages.">proton::source</a>.</p>
<p>This class provides only basic <a class="el" href="classproton_1_1map.html#aa5c42da16d5df4154dc8af4c39fbd8e0" title="Get the map entry for key k.">get()</a> and <a class="el" href="classproton_1_1map.html#ac310ae7d64b7ad8a70b200c07a55a736" title="Put a map entry for key k.">put()</a> operations for convenience. For more complicated uses (iteration, preserving order, and so on), convert the value to a standard C++ map type such as <code>std::map</code>. See <a class="el" href="message_properties_8cpp-example.html">message_properties.cpp</a> and <a class="el" href="types_page.html">AMQP and C++ types</a>. </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="ada6de583b7cdc95792661bcc0ff8a517"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ada6de583b7cdc95792661bcc0ff8a517">&#9670;&nbsp;</a></span>operator=()</h2>
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<td class="mlabels-left">
<table class="memname">
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<td class="memname">assignable_map&lt;M, <a class="el" href="classproton_1_1map.html">map</a>&amp;&gt;::type operator= </td>
<td>(</td>
<td class="paramtype">const M &amp;&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
<td></td>
</tr>
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</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
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</div><div class="memdoc">
<p>Type-safe assign from a compatible map, for instance <code>std::map&lt;K,T&gt;</code>. </p>
<p>See <a class="el" href="types_page.html">AMQP and C++ types</a>. </p>
</div>
</div>
<a id="ad7e7efff114db20e5786e0ee89a6808a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad7e7efff114db20e5786e0ee89a6808a">&#9670;&nbsp;</a></span>value()</h2>
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<td class="memname">void <a class="el" href="classproton_1_1value.html">value</a> </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classproton_1_1value.html">value</a> &amp;&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
<td></td>
</tr>
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</div><div class="memdoc">
<p>Copy from a <a class="el" href="classproton_1_1value.html" title="A holder for any AMQP value, simple or complex.">proton::value</a>. </p>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname"><a class="el" href="structproton_1_1conversion__error.html" title="An error converting between AMQP and C++ data.">proton::conversion_error</a></td><td>if <code>x</code> does not contain a compatible map. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="aa5c42da16d5df4154dc8af4c39fbd8e0"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa5c42da16d5df4154dc8af4c39fbd8e0">&#9670;&nbsp;</a></span>get()</h2>
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<td class="memname">T get </td>
<td>(</td>
<td class="paramtype">const K &amp;&#160;</td>
<td class="paramname"><em>k</em></td><td>)</td>
<td> const</td>
</tr>
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</div><div class="memdoc">
<p>Get the map entry for key <code>k</code>. </p>
<p>Return <code>T()</code> if there is no such entry. </p>
<dl class="section examples"><dt>Examples</dt><dd><a class="el" href="message_properties_8cpp-example.html#a4">message_properties.cpp</a>.</dd>
</dl>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>proton/<a class="el" href="map_8hpp_source.html">map.hpp</a></li>
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