Dune.Preprocess
Configuration for the "preprocess"
field.
This field is found in libraries and executables. It may specify ppx rewriters, as well as flags and params. Some examples:
(preprocess no_preprocessing) (preprocess (pps ppx_sexp_conv)) (preprocess (pps ppx_sexp_conv -unused-code-warnings=force))
module Predicate : sig ... end