     read_some function. If the streambuf's get area already contains the delimiter,
          the function returns immediately.
        </p>
<h6>
<a name="boost_asio.reference.read_until.overload12.h0"></a>
          <span class="phrase"><a name="boost_asio.reference.read_until.overload12.parameters"></a></span><a class="link" href="overload12.html#boost_asio.reference.read_until.overload12.parameters">Parameters</a>
        </h6>
<div class="variablelist">
<p class="title"><b></b></p>
<dl class="variablel