An example project using ocaml-rs to call Rust functions from OCaml.

If you're looking for an example of linking an OCaml library into a Rust program take a look at rust-ocaml-starter

• Update README.md
• Update the project name in dune-project
• Update the crate name in Cargo.toml
• Update src/dune and test/dune with the name of your project in place of ocaml_rust_example/ocaml-rust-example
• Rename ocaml-rust-starter.opam to match the name of your project
• Remove src/ocaml_rust_example.ml and src/ocaml_rust_example.mli and add your own OCaml files
• Update build.rs
• Edit src/lib.rs
• Add your tests to test/test.ml
• Use cargo vendor if you intend to make the project installable using opam

Many of the renaming steps can be automated using init.sh:

$ ./init.sh my_project my-project

init.sh accepts two arguments: the name of the OCaml project and the public_name, if they are the same then one argument is acceptable.

NOTE: init.sh is destructive and can only be executed once (it will remove itself) - make sure you have no modifications that you want to keep before running init.sh.

dune build

to run the tests:

dune runtest

to load your library into an interactive sesssion:

OCAML_INTEROP_NO_CAML_STARTUP=1 dune utop

The OCAML_INTEROP_NO_CAML_STARTUP environment variable should be set to ensure the library is linked correctly.