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<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.read_until"></a><a class="link" href="read_until.html" title="read_until">read_until</a>
</h3></div></div></div>
<p>
<a class="indexterm" name="asio.indexterm.read_until"></a>
</p>
<p>
The <code class="computeroutput"><span class="identifier">read_until</span></code> function is
a composed operation that reads data into a dynamic buffer sequence, or into
a streambuf, until it contains a delimiter, matches a regular expression,
or a function object indicates a match.
</p>
<p>
Read data into a dynamic buffer sequence until it contains a specified delimiter.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload1.html" title="read_until (1 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">char</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload1.html" title="read_until (1 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload2.html" title="read_until (2 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">char</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload2.html" title="read_until (2 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload3.html" title="read_until (3 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">string_view</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload3.html" title="read_until (3 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload4.html" title="read_until (4 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">string_view</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload4.html" title="read_until (4 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a dynamic buffer sequence until some part of the data it contains
matches a regular expression.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload5.html" title="read_until (5 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="special">&</span> <span class="identifier">expr</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload5.html" title="read_until (5 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload6.html" title="read_until (6 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="special">&</span> <span class="identifier">expr</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload6.html" title="read_until (6 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a dynamic buffer sequence until a function object indicates
a match.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">MatchCondition</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload7.html" title="read_until (7 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">MatchCondition</span> <span class="identifier">match_condition</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_match_condition</span><span class="special"><</span> <span class="identifier">MatchCondition</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload7.html" title="read_until (7 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">MatchCondition</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload8.html" title="read_until (8 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v1</span> <span class="special">&&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">MatchCondition</span> <span class="identifier">match_condition</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_match_condition</span><span class="special"><</span> <span class="identifier">MatchCondition</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v1</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="special">!</span><span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">decay</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v1</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload8.html" title="read_until (8 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a streambuf until it contains a specified delimiter.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload9.html" title="read_until (9 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="keyword">char</span> <span class="identifier">delim</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload9.html" title="read_until (9 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload10.html" title="read_until (10 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="keyword">char</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload10.html" title="read_until (10 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload11.html" title="read_until (11 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="identifier">string_view</span> <span class="identifier">delim</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload11.html" title="read_until (11 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload12.html" title="read_until (12 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="identifier">string_view</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload12.html" title="read_until (12 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a streambuf until some part of the data it contains matches
a regular expression.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload13.html" title="read_until (13 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="special">&</span> <span class="identifier">expr</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload13.html" title="read_until (13 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload14.html" title="read_until (14 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="special">&</span> <span class="identifier">expr</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload14.html" title="read_until (14 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a streambuf until a function object indicates a match.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">MatchCondition</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload15.html" title="read_until (15 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="identifier">MatchCondition</span> <span class="identifier">match_condition</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_match_condition</span><span class="special"><</span> <span class="identifier">MatchCondition</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload15.html" title="read_until (15 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">Allocator</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">MatchCondition</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload16.html" title="read_until (16 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">basic_streambuf</span><span class="special"><</span> <span class="identifier">Allocator</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">b</span><span class="special">,</span>
<span class="identifier">MatchCondition</span> <span class="identifier">match_condition</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_match_condition</span><span class="special"><</span> <span class="identifier">MatchCondition</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload16.html" title="read_until (16 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a dynamic buffer sequence until it contains a specified delimiter.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload17.html" title="read_until (17 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">char</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload17.html" title="read_until (17 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload18.html" title="read_until (18 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">char</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload18.html" title="read_until (18 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload19.html" title="read_until (19 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">string_view</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload19.html" title="read_until (19 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload20.html" title="read_until (20 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">string_view</span> <span class="identifier">delim</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload20.html" title="read_until (20 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a dynamic buffer sequence until some part of the data it contains
matches a regular expression.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload21.html" title="read_until (21 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="special">&</span> <span class="identifier">expr</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload21.html" title="read_until (21 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload22.html" title="read_until (22 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="special">&</span> <span class="identifier">expr</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload22.html" title="read_until (22 of 24 overloads)">more...</a></em></span>
</pre>
<p>
Read data into a dynamic buffer sequence until a function object indicates
a match.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">MatchCondition</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload23.html" title="read_until (23 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">MatchCondition</span> <span class="identifier">match_condition</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_match_condition</span><span class="special"><</span> <span class="identifier">MatchCondition</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload23.html" title="read_until (23 of 24 overloads)">more...</a></em></span>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="SyncReadStream.html" title="Buffer-oriented synchronous read stream requirements">SyncReadStream</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">MatchCondition</span><span class="special">></span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="read_until/overload24.html" title="read_until (24 of 24 overloads)">read_until</a><span class="special">(</span>
<span class="identifier">SyncReadStream</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
<span class="identifier">DynamicBuffer_v2</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">MatchCondition</span> <span class="identifier">match_condition</span><span class="special">,</span>
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_match_condition</span><span class="special"><</span> <span class="identifier">MatchCondition</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_dynamic_buffer_v2</span><span class="special"><</span> <span class="identifier">DynamicBuffer_v2</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
<span class="emphasis"><em>» <a class="link" href="read_until/overload24.html" title="read_until (24 of 24 overloads)">more...</a></em></span>
</pre>
<h5>
<a name="asio.reference.read_until.h0"></a>
<span><a name="asio.reference.read_until.requirements"></a></span><a class="link" href="read_until.html#asio.reference.read_until.requirements">Requirements</a>
</h5>
<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">asio/read_until.hpp</code>
</p>
<p>
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio.hpp</code>
</p>
</div>
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