Is it possible to use arrow keys in OCaml interpreter?

Question

Everytime I use these keys in the interpreter I keep getting symbols like this appearing:

[[D^[[C

I'm using Linux Mint 12 in ZSH, however I'm getting the same result in Ubuntu with bash. Also, same thing in ssh.

Answer 1

The stock OCaml toplevel doesn't have line editing built in. I use rlwrap:

$ cat bin/ocaml
#!/bin/sh
exec rlwrap /usr/local/bin/ocaml "$@"

Using the toplevel without something like this is quite painful, in my opinion!

Other possibilities are to run the toplevel under emacs (a popular choice, I think), or to use utop. I haven't used utop, but it sounds cool.

Answer 2

Another option is to use: ledit ocaml

Although I prefer utop over anything else myself.