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This is an Emacs mode that supports working with Coalton. Most of the logic is implemented as an LSP server.

Requirements

This mode has been developed using eglot, which is included with Emacs since version 29. The mode can be installed with M-x package-install RET eglot RET in Emacs 26.3 and later.

In addition to Coalton, the LSP server process depends on the following Lisp libraries:

  • alexandria
  • bordeaux-threads
  • com.inuoe.jzon
  • usocket

Current Status

Supported LSP features:

  • diagnostics: whenever a .coal file is saved, the contents are compiled, and diagnostics are published to the client.

Usage

In the Emacs init file (e.g. ~/.emacs.d/init.el), add this directory to the load-path, and require the mode:

;; Coalton

(add-to-list 'load-path "~/git/coalton-mode")
(require 'coalton-mode)

Start the server in slime with:

SLIME 2.30.git
CL-USER> (asdf:load-system "coalton-lsp")
;; COALTON starting in development mode
;; COALTON starting with specializations enabled
;; COALTON starting with heuristic inlining disabled
;; COALTON will emit type annotations
T
CL-USER> (coalton-lsp::start-server)
;; :INFO coalton-mode: start #<SERVER 127.0.0.1:7887 {700D0A4333}>
#<COALTON-MODE::SERVER 127.0.0.1:7887 {700D0A4333}>

In Emacs, open a .coal file (e.g. resources/fibonacci.coal), and enable eglot mode:

M-x eglot