whiley-mode.el

;;; whiley-mode.el --- Major mode for Whiley language -*- lexical-binding: t; -*-

;; Copyright (C) 2012-- David J. Pearce
;;
;; Author: David J. Pearce <dave01001110@gmail.com>
;; URL: http://github.com/Whiley/WhileyEmacsMode
;; Version: 1.0.1
;; Package-Requires: ((emacs "24.1"))
;; Keywords: languages

;; This file is not part of GNU Emacs.

;;; License:

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; This package provides a major mode for working with programs
;; written in the Whiley programming language.

(require 'cc-mode)

;;; Code:

(defun whiley-comment-dwim (arg)
  "Comment or uncomment current line or region in a smart way.
For detail, see `comment-dwim'.  Argument ARG is optional prefiex
for `comment-dwim'."
   (interactive "*P")
   (require 'newcomment)
   (let ((deactivate-mark nil) (comment-start "//") (comment-end ""))
     (comment-dwim arg)))

(defvar whiley-keywords
  '("native" "unsafe" "export" "extern" "final" "null" "return" "if" "is" "throw" "throws" "try" "catch" "switch" "case" "default" "break" "continue" "skip" "do" "while" "for" "else" "define" "assume" "assert" "assume" "package" "import" "function" "method" "type" "constant" "from" "with" "debug" "where" "ensures" "requires" "old" "public" "protected" "private" "this" "str" "new" "in" "no" "some" "all" "false" "true" "property" "template" "variant")
    "Whiley keywords.")

(defvar whiley-types
  '("real" "int" "bool" "void" "void" "ref")
  "Whiley types.")

(defvar whiley-keywords-regexp (regexp-opt whiley-keywords 'words))
(defvar whiley-type-regexp (regexp-opt whiley-types 'words))
(defvar whiley-font-lock-keywords
  `((,whiley-type-regexp . font-lock-type-face)(,whiley-keywords-regexp . font-lock-keyword-face)))

;;;###autoload
(define-derived-mode whiley-mode fundamental-mode
  "whiley mode"
  "Major mode for editing Whiley ..."
  (setq font-lock-defaults '((whiley-font-lock-keywords)))
  (setq whiley-keywords-regexp nil)
  (setq whiley-type-regexp nil)

  ;; java-style comments "// ..." and “/* … */”
  (define-key whiley-mode-map [remap comment-dwim] 'whiley-comment-dwim)
  (modify-syntax-entry ?\/ ". 124b" whiley-mode-syntax-table)
  (modify-syntax-entry ?* ". 23" whiley-mode-syntax-table)
  (modify-syntax-entry ?\n "> b" whiley-mode-syntax-table)

  ;; indentation.  Needs work!
  (setq indent-tabs-mode nil)
  (local-set-key (kbd "TAB") 'tab-to-tab-stop)
  (setq tab-stop-list (list 4 8 12 16 20 24 28)))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.whiley\\'" . whiley-mode))

;;;###autoload
(provide 'whiley-mode)
;;; whiley-mode.el ends here