Fork. This is the opengrep fork of visitors, based on upstream master after release 20260520. It differs from upstream by one change: every generated function is built as a single function of all its parameters, so that under the OCaml 5.2 AST of ppxlib 0.36 and later a generated method is not compiled into a chain of one-parameter closures.

An OCaml syntax extension (technically, a ppx_deriving plugin) which generates object-oriented visitors for traversing and transforming data structures.

Here is the documentation of the latest released version.

The easiest way of installing the latest released version of this package is via opam, the OCaml package manager.

opam update
opam install visitors

To install the latest development version, also via opam, please proceed as follows:

  git clone https://gitlab.inria.fr/fpottier/visitors.git
  cd visitors
  make pin

To install the latest development version, outside of opam, please proceed as follows:

  git clone https://gitlab.inria.fr/fpottier/visitors.git
  cd visitors
  opam install . --deps-only
  make install