State of emergency and rule of law in France

The state of emergency was decreed on November 14, 2015 in France to face the terrorist attacks of this bloody night. It was then extended for two years. Justified by the fight against terrorism, it survived and was used for other purposes. Therefore, one can wonder how the contemporary State structured by the rule of law (Etat de droit) as France is it, composed with regimes of exception and integrate them in their daily life. What conceptual evolutions result particularly on the understanding of the rule of law ?