n class="phrase"><a name="spirit.qi.reference.operator.kleene.expression_semantics"></a></span><a class="link" href="kleene.html#spirit.qi.reference.operator.kleene.expression_semantics">Expression
            Semantics</a>
          </h6>
<p>
            Semantics of an expression is defined only where it differs from, or
            is not defined in <a class="link" href="../parser_concepts/unaryparser.html" title="UnaryParser"><code class="computeroutput"><span class="identifier">UnaryParser</span></code