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4<title>http::parser::parser (5 of 5 overloads)</title>
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26<div class="titlepage"><div><div><h6 class="title">
27<a name="beast.ref.boost__beast__http__parser.parser.overload5"></a><a class="link" href="overload5.html" title="http::parser::parser (5 of 5 overloads)">http::parser::parser
28          (5 of 5 overloads)</a>
29</h6></div></div></div>
30<p>
31            Construct a parser from another parser, changing the Body type.
32          </p>
33<h7><a name="beast.ref.boost__beast__http__parser.parser.overload5.h0"></a>
34            <span class="phrase"><a name="beast.ref.boost__beast__http__parser.parser.overload5.synopsis"></a></span><a class="link" href="overload5.html#beast.ref.boost__beast__http__parser.parser.overload5.synopsis">Synopsis</a>
35          </h7><pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
36    <span class="keyword">class</span> <span class="identifier">OtherBody</span><span class="special">,</span>
37    <span class="keyword">class</span><span class="special">...</span> <span class="identifier">Args</span><span class="special">&gt;</span>
38<span class="identifier">parser</span><span class="special">(</span>
39    <span class="identifier">parser</span><span class="special">&lt;</span> <span class="identifier">isRequest</span><span class="special">,</span> <span class="identifier">OtherBody</span><span class="special">,</span> <span class="identifier">Allocator</span> <span class="special">&gt;&amp;&amp;</span> <span class="identifier">parser</span><span class="special">,</span>
40    <span class="identifier">Args</span><span class="special">&amp;&amp;...</span> <span class="identifier">args</span><span class="special">);</span>
41</pre>
42<h7><a name="beast.ref.boost__beast__http__parser.parser.overload5.h1"></a>
43            <span class="phrase"><a name="beast.ref.boost__beast__http__parser.parser.overload5.description"></a></span><a class="link" href="overload5.html#beast.ref.boost__beast__http__parser.parser.overload5.description">Description</a>
44          </h7><p>
45            This constructs a new parser by move constructing the header from another
46            parser with a different body type. The constructed-from parser must not
47            have any parsed body octets or initialized <span class="emphasis"><em>BodyReader</em></span>,
48            otherwise an exception is generated.
49          </p>
50<h7><a name="beast.ref.boost__beast__http__parser.parser.overload5.h2"></a>
51            <span class="phrase"><a name="beast.ref.boost__beast__http__parser.parser.overload5.example"></a></span><a class="link" href="overload5.html#beast.ref.boost__beast__http__parser.parser.overload5.example">Example</a>
52          </h7><pre class="programlisting"><span class="comment">// Deferred body type commitment</span>
53<span class="identifier">request_parser</span><span class="special">&lt;</span><span class="identifier">empty_body</span><span class="special">&gt;</span> <span class="identifier">req0</span><span class="special">;</span>
54<span class="special">...</span>
55<span class="identifier">request_parser</span><span class="special">&lt;</span><span class="identifier">string_body</span><span class="special">&gt;</span> <span class="identifier">req</span><span class="special">{</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">move</span><span class="special">(</span><span class="identifier">req0</span><span class="special">)};</span>
56</pre>
57<p>
58            If an exception is thrown, the state of the constructed-from parser is
59            undefined.
60          </p>
61<h7><a name="beast.ref.boost__beast__http__parser.parser.overload5.h3"></a>
62            <span class="phrase"><a name="beast.ref.boost__beast__http__parser.parser.overload5.parameters"></a></span><a class="link" href="overload5.html#beast.ref.boost__beast__http__parser.parser.overload5.parameters">Parameters</a>
63          </h7><div class="informaltable"><table class="table">
64<colgroup>
65<col>
66<col>
67</colgroup>
68<thead><tr>
69<th>
70                    <p>
71                      Name
72                    </p>
73                  </th>
74<th>
75                    <p>
76                      Description
77                    </p>
78                  </th>
79</tr></thead>
80<tbody>
81<tr>
82<td>
83                    <p>
84                      <code class="computeroutput"><span class="identifier">parser</span></code>
85                    </p>
86                  </td>
87<td>
88                    <p>
89                      The other parser to construct from. After this call returns,
90                      the constructed-from parser may only be destroyed.
91                    </p>
92                  </td>
93</tr>
94<tr>
95<td>
96                    <p>
97                      <code class="computeroutput"><span class="identifier">args</span></code>
98                    </p>
99                  </td>
100<td>
101                    <p>
102                      Optional arguments forwarded to the message constructor.
103                    </p>
104                  </td>
105</tr>
106</tbody>
107</table></div>
108<h7><a name="beast.ref.boost__beast__http__parser.parser.overload5.h4"></a>
109            <span class="phrase"><a name="beast.ref.boost__beast__http__parser.parser.overload5.exceptions"></a></span><a class="link" href="overload5.html#beast.ref.boost__beast__http__parser.parser.overload5.exceptions">Exceptions</a>
110          </h7><div class="informaltable"><table class="table">
111<colgroup>
112<col>
113<col>
114</colgroup>
115<thead><tr>
116<th>
117                    <p>
118                      Type
119                    </p>
120                  </th>
121<th>
122                    <p>
123                      Thrown On
124                    </p>
125                  </th>
126</tr></thead>
127<tbody><tr>
128<td>
129                    <p>
130                      <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">invalid_argument</span></code>
131                    </p>
132                  </td>
133<td>
134                    <p>
135                      Thrown when the constructed-from parser has already initialized
136                      a body reader.
137                    </p>
138                  </td>
139</tr></tbody>
140</table></div>
141<h7><a name="beast.ref.boost__beast__http__parser.parser.overload5.h5"></a>
142            <span class="phrase"><a name="beast.ref.boost__beast__http__parser.parser.overload5.remarks"></a></span><a class="link" href="overload5.html#beast.ref.boost__beast__http__parser.parser.overload5.remarks">Remarks</a>
143          </h7><p>
144            This function participates in overload resolution only if the other parser
145            uses a different body type.
146          </p>
147</div>
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150<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Vinnie
151      Falco<p>
152        Distributed under the Boost Software License, Version 1.0. (See accompanying
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