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31 Returns the payload size of the body.
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37 <pre class="programlisting"><span class="keyword">static</span>
38 <span class="identifier">std</span><span class="special">::</span><span class="identifier">uint64_t</span>
39 <span class="identifier">size</span><span class="special">(</span>
40 <span class="identifier">value_type</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">v</span><span class="special">);</span>
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47 When this body is used with <a class="link" href="../boost__beast__http__message/prepare_payload.html" title="http::message::prepare_payload"><code class="computeroutput"><span class="identifier">http</span><span class="special">::</span><span class="identifier">message</span><span class="special">::</span><span class="identifier">prepare_payload</span></code></a>, the Content-Length
48 will be set to the payload size, and any chunked Transfer-Encoding will
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