(Original issue 1535 created by tdubouch on 2019-08-17T06:56:37.002511+00:00)

Concise Data Definition Language (CDDL) describes JSON or CBOR data structure and has been standardized as of RFC 8610.

A first attempt at writing a lexer is available here. The lexer is loosely based on the grammar in the RFC but is already handling most of the cases. The test file contains all of the examples from the RFC.