README.org

:lang ocaml

Description

This module adds OCaml support to Doom Emacs, powered by doom-package:tuareg-mode.

• Code completion, documentation look-up, code navigation and refactoring (doom-package:merlin)
• Type, documentation and function argument display on idle (doom-package:merlin-eldoc)
• REPL (doom-package:utop)
• Syntax-checking (doom-package:merlin with doom-package:flycheck-ocaml)
• Auto-indentation (doom-package:ocp-indent)
• Code formatting (doom-package:ocamlformat)
• Dune file format (doom-package:dune)

Maintainers

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Module flags

+lsp

Enable LSP support for tuareg-mode. Requires doom-module::tools lsp and a langserver (supports ocaml-language-server).

+tree-sitter

Leverages tree-sitter for better syntax highlighting and structural text editing. Requires doom-module::tools tree-sitter.

Packages

• doom-package:dune
• doom-package:ocamlformat if doom-module::editor format
• doom-package:ocp-indent
• doom-package:tuareg
• doom-package:utop if doom-module::tools eval
• unless doom-module:+lsp
  • doom-package:flycheck-ocaml if doom-module::checkers syntax
  • doom-package:merlin
  • doom-package:merlin-company
  • doom-package:merlin-eldoc

Hacks

• set-ligatures! 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 time doom-package:tuareg is loaded

Changelog

This module does not have a changelog yet.

Installation

Enable this module in your doom! block.

This module requires the following packages available through opam:

• merlin
• utop
• ocp-indent
• dune
• ocamlformat

Usage

🔨 This module’s usage documentation is incomplete. Complete it?

• 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) and ocamlmerlin executable is present
• Line-based auto-indentation is provided by ocp-indent, if it is available.

Command	Key	Description
merlin-type-enclosing	<localleader> t	display type under point
tuareg-find-alternate-file	<localleader> a	switch between .ml and .mli
merlin-locate	g d	lookup definition
merlin-occurences	SPC c D	lookup references
merlin-document	K	lookup documentation
merlin-imenu	SPC s 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

Configuration

🔨 This module’s configuration documentation is incomplete. Complete it?

• If doom-module::completion company is enabled then autocomplete is provided by doom-package:merlin
• When doom-module::checkers syntax is enabled then doom-package:flycheck-ocaml is activated to do on-the-fly syntax/type checking via doom-package:merlin, otherwise this is only done when the file is saved.
• Spell checking is activated in comments if doom-module::checkers spell is active
• A REPL is provided if doom-package:utop is installed and doom-module::tools eval is active
• If doom-module::editor format is enabled, the ocamlformat executable is available and there is an .ocamlformat file present then format-all-buffer is bound to ocamlformat, otherwise to ocp-indent
• If doom-module::editor multiple-cursors is enabled then identifiers can be refactored with v R and multiple cursors (this correctly matches identifier occurrences according to scope, it is not purely a textual match)

Run $ doom sync to install all packages and $ doom doctor to diagnose missing tools.

Troubleshooting

There are no known problems with this module. Report one?

Frequently asked questions

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Appendix

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