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lang/ocaml
Table of Contents TOC
Description
This module adds OCaml support to Doom Emacs, powered by tuareg-mode.
- Code completion, documentation look-up, code navigation and refactoring (merlin)
- Type, documentation and function argument display on idle (merlin-eldoc)
- REPL (utop)
- Syntax-checking (
merlin
with flycheck-ocaml) - Auto-indentation (ocp-indent)
- Code formatting (ocamlformat)
- Dune file format (dune)
Module Flags
This module provides no flags.
Plugins
Prerequisites
This module has no hard dependencies, but it is recommanded that you install opam and the following opam (optional) packages:
opam install merlin utop ocp-indent dune ocamlformat
Features
- The following files should have syntax highlighting support:
.ml{i,p,y,}
,.eliom{i,}
,jbuild
,dune
,opam
merlin-mode
is activated whenever a.merlin
file is found (including in a parent directory) andocamlmerlin
executable is present- Line-based auto-indentation is provided by
ocp-indent
, if it is available.
Configuration
- If
:completion company
is enabled then autocomplete is provided bymerlin
- When
:checkers syntax
is enabled thenflycheck-ocaml
is activated to do on-the-fly syntax/type checking viamerlin
, otherwise this is only done when the file is saved. - Spell checking is activated in comments if
:checkers spell
is active - A REPL is provided if
utop
is installed and:tools eval
is active - If
:editor format
is enabled, theocamlformat
executable is available and there is an.ocamlformat
file present thenformat-all-buffer
is bound toocamlformat
, otherwise toocp-indent
- If
:editor multiple-cursors
is enabled then identifiers can be refactored withv R
and multiple cursors (this correctly matches identifier occurrences according to scope, it is not purely a textual match) - If
:emacs imenu
is enabled then top level symbols (modules, type, functions, etc.) can be looked up usingSPC / i
Run doom sync
to install all packages and doom doctor
to diagnose missing
tools.
Appendix
Commands
Command | Key | Description |
---|---|---|
merlin-type-enclosing |
SPC m t |
display type under point |
tuareg-find-alternate-file |
SPC m a |
switch between .ml and .mli |
merlin-locate |
gd |
lookup definition |
merlin-occurences |
SPC c D |
lookup references |
merlin-document |
K |
lookup documentation |
merlin-imenu |
SPC / i |
symbol lookup in file |
merlin-iedit-occurrences |
v R |
visual refactor identifier under point (multiple cursors) |
utop |
SPC o r |
open utop as REPL |
utop-eval-region |
SPC c e |
evaluate selected region in utop |
Hacks
set-pretty-symbols!
is called with the full tuareg prettify symbol list, this can cause columns to change as certain keywords are shortened (e.g.fun
becomes λ.tuareg-opam-update-env
is called the first timetuareg
is loaded