Autocompletion is only partially working (in VS Code and utop)

Ecosystem
#1

I’m new to both OCaml and Visual Studio Code so this is probably some kind of newbie question, however…

I have opened a hello.ml file in Visual Studio Code and when I type “String.” I get a nice window of autocompletion possibilities. However, if I type “Base.”, “Core.” or “Async.”, nothing pops up. I have just installed these packages with opam (and tried to restart Visual Studio Code).

I just tried utop, same behaviour there.

I’m running macos and have installed things through brew.

How do I fix this?

#2

In short, you should setup your project using dune build system. After that VsCode will find out by itself what libraries you are using and how to autocomplete them

1 Like
#3

I think OP has identified a potential improvement. Maybe ocaml-vscode-platform and/or vscode-reasonml should be configurable, to always append the default opam switch’s path (or any user-specified path) if available, as a fallback to merlin’s paths, eliminating the need for a dune-based repo for simple experiments and/or learning - utop has completion too, but some people just prefer editors.

#4

Thanks, this helped me out with getting it to work in Visual Studio Code. Apparently, I had some other problems too, which was why it didn’t work out in utop either. So same behaviour but different reasons. Anyway, now it works on both places. Thanks.