Issue with minimal .ocamlinit from Real World Ocaml

Learning
1

Hi,

Following the installation and setup instructions for ocaml tool chain from Real World Ocaml book.
An issue arise after setting up utop, the .ocamlinit containing :

#require "core.top";;
#require "ppx_jane";;
open Base;;

cause an error when ocaml interactive shell start :

~$ ocaml
        OCaml version 4.13.1

Unknown directive `require'.
#

Since any issue arise before, I don’t think I’ve forgotten some steps.
I can provide more information if needed.
Any advice will be appreciated, thanks in advance !

Cheers

1 Like
2

#require is a top-level instruction from ocamlfind which is loaded by utop but not by the ocaml top-level (by default). The error should thus go away if you try starting utop instead.

You can also add the below as a first line to ~/.ocamlinit if you want this to work under the ocaml top-level too:

#use "topfind";;
3 Likes
3

Ok, I’ve investigated more on utop, and I’ve decided to create an init.ml file for utop and remove the content of .ocamlinit.
I will follow the Book with utop repl.
Thanks a lot

Bye

4

What was the error you had with utop? You’ll typically have a much smoother experience working through RWO with utop instead of the vanilla OCaml toplevel.