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In page Roland Barthes:

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Roland Barthes' incisive criticism contributed to the development of theoretical schools such as structuralism, semiotics, and post-structuralism. While his influence is mainly found in these theoretical fields with which his work brought him into contact, it is also felt in every field concerned with the representation of information and models of communication, including computers, photography, music, and literature. One consequence of Barthes' breadth of focus is that his legacy includes no following of thinkers dedicated to modeling themselves after him. The fact that Barthes’ work was ever adapting and refuting notions of stability and constancy means there is no canon of thought within his theory to model one's thoughts upon, and thus no "Barthesism".