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-;;; reason-mode.el --- A major mode for editing ReasonML -*-lexical-binding: t-*-
-;; Portions Copyright (c) 2015-present, Facebook, Inc. All rights reserved.
-
-;; Version: 0.4.0
-;; Author: Mozilla
-;; Url: https://github.com/reasonml-editor/reason-mode
-;; Keywords: languages, ocaml
-;; Package-Requires: ((emacs "24.3"))
-
-;; This file is NOT part of GNU Emacs.
-
-;; This file is distributed under the terms of both the MIT license and the
-;; Apache License (version 2.0).
-
-;;; Commentary:
-;; This project provides useful functions and helpers for developing code
-;; using the Reason programming language (https://facebook.github.io/reason).
-;;
-;; Reason is an umbrella project that provides a curated layer for OCaml.
-;;
-;; It offers:
-;;  - A new, familiar syntax for the battle-tested language that is OCaml.
-;;  - A workflow for compiling to JavaScript and native code.
-;;  - A set of friendly documentations, libraries and utilities.
-;;
-;; See the README.md for more details.
-
-;;; Code:
-
-(require 'reason-indent)
-(require 'refmt)
-(require 'reason-interaction)
-
-(eval-when-compile (require 'rx)
-                   (require 'compile)
-                   (require 'url-vars))
-
-;; Syntax definitions and helpers
-(defvar reason-mode-syntax-table
-  (let ((table (make-syntax-table)))
-
-    ;; Operators
-    (dolist (i '(?+ ?- ?* ?/ ?& ?| ?^ ?! ?< ?> ?~ ?@))
-      (modify-syntax-entry i "." table))
-
-    ;; Strings
-    (modify-syntax-entry ?\" "\"" table)
-    (modify-syntax-entry ?\\ "\\" table)
-    (modify-syntax-entry ?\' "_"  table)
-
-    ;; Comments
-    (modify-syntax-entry ?/  ". 124b" table)
-    (modify-syntax-entry ?*  ". 23n"  table)
-    (modify-syntax-entry ?\n "> b"    table)
-    (modify-syntax-entry ?\^m "> b"   table)
-
-    table))
-
-(defgroup reason nil
-  "Support for Reason code."
-  :link '(url-link "http://facebook.github.io/reason/")
-  :group 'languages)
-
-(defcustom reason-mode-hook nil
-  "Hook called by `reason-mode'."
-  :type 'hook
-  :group 'reason)
-
-;; Font-locking definitions and helpers
-(defconst reason-mode-keywords
-  '("and" "as"
-    "else" "external"
-    "fun" "for"
-    "if" "impl" "in" "include"
-    "let"
-    "module" "match" "mod" "move" "mutable"
-    "open"
-    "priv" "pub"
-    "rec" "ref" "return"
-    "self" "static" "switch" "struct" "super"
-    "trait" "type"
-    "use"
-    "virtual"
-    "where" "when" "while"))
-
-(defconst reason-mode-consts
-  '("true" "false"))
-
-(defconst reason-special-types
-  '("int" "float" "string" "char"
-    "bool" "unit" "list" "array" "exn"
-    "option" "ref"))
-
-(defconst reason-camel-case
-  (rx symbol-start
-      (group upper (0+ (any word nonascii digit "_")))
-      symbol-end))
-
-(eval-and-compile
-  (defconst reason--char-literal-rx
-    (rx (seq (group "'")
-             (or (seq "\\" anything)
-                 (not (any "'\\")))
-             (group "'")))))
-
-(defun reason-re-word (inner)
-  "Build a word regexp given INNER."
-  (concat "\\<" inner "\\>"))
-
-(defun reason-re-grab (inner)
-  "Build a grab regexp given INNER."
-  (concat "\\(" inner "\\)"))
-
-(defun reason-regexp-opt-symbols (words)
-  "Like `(regexp-opt words 'symbols)`, but will work on Emacs 23.
-See rust-mode PR #42.
-Argument WORDS argument to pass to `regexp-opt`."
-  (concat "\\_<" (regexp-opt words t) "\\_>"))
-
-;;; Syntax highlighting for Reason
-(defvar reason-font-lock-keywords
-  `((,(reason-regexp-opt-symbols reason-mode-keywords) . font-lock-keyword-face)
-    (,(reason-regexp-opt-symbols reason-special-types) . font-lock-builtin-face)
-    (,(reason-regexp-opt-symbols reason-mode-consts) . font-lock-constant-face)
-
-    (,reason-camel-case 1 font-lock-type-face)
-
-    ;; Field names like `foo:`, highlight excluding the :
-    (,(concat (reason-re-grab reason-re-ident) ":[^:]") 1 font-lock-variable-name-face)
-    ;; Module names like `foo::`, highlight including the ::
-    (,(reason-re-grab (concat reason-re-ident "::")) 1 font-lock-type-face)
-    ;; Name punned labeled args like ::foo
-    (,(concat "[[:space:]]+" (reason-re-grab (concat "::" reason-re-ident))) 1 font-lock-type-face)
-
-    ;; TODO jsx attribs?
-    (,
-     (concat "<[/]?" (reason-re-grab reason-re-ident) "[^>]*" ">")
-     1 font-lock-type-face)))
-
-(defun reason-mode-try-find-alternate-file (mod-name extension)
-  "Switch to the file given by MOD-NAME and EXTENSION."
-  (let* ((filename (concat mod-name extension))
-         (buffer (get-file-buffer filename)))
-    (if buffer (switch-to-buffer buffer)
-      (find-file filename))))
-
-(defun reason-mode-find-alternate-file ()
-  "Switch to implementation/interface file."
-  (interactive)
-  (let ((name buffer-file-name))
-    (when (string-match "\\`\\(.*\\)\\.re\\([il]\\)?\\'" name)
-      (let ((mod-name (match-string 1 name))
-            (e (match-string 2 name)))
-        (cond
-         ((string= e "i")
-          (reason-mode-try-find-alternate-file mod-name ".re"))
-         (t
-          (reason-mode-try-find-alternate-file mod-name ".rei")))))))
-
-(defun reason--syntax-propertize-multiline-string (end)
-  "Propertize Reason multiline string.
-Argument END marks the end of the string."
-  (let ((ppss (syntax-ppss)))
-    (when (eq t (nth 3 ppss))
-      (let ((key (save-excursion
-                   (goto-char (nth 8 ppss))
-                   (and (looking-at "{\\([a-z]*\\)|")
-                        (match-string 1)))))
-        (when (search-forward (format "|%s}" key) end 'move)
-          (put-text-property (1- (match-end 0)) (match-end 0)
-                             'syntax-table (string-to-syntax "|")))))))
-
-(defun reason-syntax-propertize-function (start end)
-  "Propertize Reason function.
-Argument START marks the beginning of the function.
-Argument END marks the end of the function."
-  (goto-char start)
-  (reason--syntax-propertize-multiline-string end)
-  (funcall
-   (syntax-propertize-rules
-    (reason--char-literal-rx (1 "\"") (2 "\""))
-    ;; multi line strings
-    ("\\({\\)[a-z]*|"
-     (1 (prog1 "|"
-          (goto-char (match-end 0))
-          (reason--syntax-propertize-multiline-string end)))))
-   (point) end))
-
-(defvar reason-mode-map
-  (let ((map (make-sparse-keymap)))
-    (define-key map "\C-c\C-a" #'reason-mode-find-alternate-file)
-    (define-key map "\C-c\C-r" #'refmt-region-ocaml-to-reason)
-    (define-key map "\C-c\C-o" #'refmt-region-reason-to-ocaml)
-    map))
-
-;;;###autoload
-(define-derived-mode reason-mode prog-mode "Reason"
-  "Major mode for Reason code.
-
-\\{reason-mode-map}"
-  :group 'reason
-  :syntax-table reason-mode-syntax-table
-  :keymap reason-mode-map
-
-  ;; Syntax
-  (setq-local syntax-propertize-function #'reason-syntax-propertize-function)
-  ;; Indentation
-  (setq-local indent-line-function 'reason-mode-indent-line)
-  ;; Fonts
-  (setq-local font-lock-defaults '(reason-font-lock-keywords))
-  ;; Misc
-  (setq-local comment-start "/*")
-  (setq-local comment-end   "*/")
-  (setq-local indent-tabs-mode nil)
-  ;; Allow paragraph fills for comments
-  (setq-local comment-start-skip "/\\*+[ \t]*")
-  (setq-local paragraph-start
-              (concat "^[ \t]*$\\|\\*)$\\|" page-delimiter))
-  (setq-local paragraph-separate paragraph-start)
-  (setq-local require-final-newline t)
-  (setq-local normal-auto-fill-function nil)
-  (setq-local comment-multi-line t)
-
-  (setq-local beginning-of-defun-function 'reason-beginning-of-defun)
-  (setq-local end-of-defun-function 'reason-end-of-defun)
-  (setq-local parse-sexp-lookup-properties t))
-
-;;;###autoload
-(add-to-list 'auto-mode-alist '("\\.rei?\\'" . reason-mode))
-
-(defun reason-mode-reload ()
-  "Reload Reason mode."
-  (interactive)
-  (unload-feature 'reason-mode)
-  (unload-feature 'reason-indent)
-  (unload-feature 'reason-interaction)
-  (require 'reason-mode)
-  (reason-mode))
-
-(provide 'reason-mode)
-
-;;; reason-mode.el ends here