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<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../../Expr.html" title="Concept Expr">Expr</a><span class="special">&gt;</span> basic_regex&amp; <a name="idp114744720-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="identifier">Expr</span> <span class="keyword"