gic/tribool_fwd.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.logic.tribool_io_hpp">Header &lt;boost/logic/tribool_io.hpp&gt;</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.logic.tribool_hpp"></a>Header &lt;<a href="../../../boost/logic/tribool.hpp" target="_top">boost/logic/tribool.hpp</a>&gt;</h3></div></div></div>
<pre class="synopsis">

<a class="link" href="../BOOST_TRIBOOL_THIRD_STATE.