Core
References: OPAM Core.Map
Setup
1opam switch create core_ocaml_5_2_2 ocaml.5.2.2
2eval $(opam env)1eval $(opam env --switch=core_ocaml_5_2_2)1opam repo add janestreet-bleeding https://github.com/janestreet/opam-repository.git
2
3opam repo add janestreet-bleeding-external https://github.com/janestreet/opam-repository.git#external-packages1opam update
2opam upgrade1opam install core re utop