All auto-completion problems

[ulugbekna]

An umbrella issue for auto-completion problems:

• Doesn't work with incorrect suffix - Fix completion with incorrect suffix  #838
• Doesn't work for record fields - Missing auto-completion for records and inline records ocamllabs/vscode-ocaml-platform#956
• Doesn't work for named arguments

given

let aux acc x = acc + x in 
List.fold_left [1; 2; 3] ~init:0 ~f:<|>

should olsp offer completion? Currently, one can circumvent the problem by using a typed hole ~f:_ will offer suggestions to fill the hole.

[copy]

After !, ocaml-lsp should offer to complete references, but it offers operators starting with ! (technically fine, but the former behavior is mostly what you want when typing !). If you put a space after ! it works.

[sidkshatriya]

• Doesn't autocomplete OCaml object methods. Though this is downstream issue with merlin. See Completion for object methods merlin#1575