s="textblock"><h3>template&lt;typename GR, typename K&gt;<br/>
class lemon::IterableBoolMap&lt; GR, K &gt;::TrueIt</h3>

<p>Iterator for the keys mapped to <code>true</code>. It works like a graph item iterator, it can be converted to the key type of the map, incremented with <code>++</code> operator, and if the iterator leaves the last valid key, it will be equal to <code>INVALID</code>. </p>
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<p><code>#include &lt;lemon/maps.h&gt;</code></p>

<p>Inherits Key.</p>
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