/usr/share/emacs/site-lisp/ghc-mod/ghc-func.el is in ghc-mod-el 5.6.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;;;
;;; ghc-func.el
;;;
;; Author: Kazu Yamamoto <Kazu@Mew.org>
;; Created: Sep 25, 2009
;;; Code:
(defvar ghc-module-command "ghc-mod"
"*The command name of \"ghc-mod\"")
(defvar ghc-ghc-options nil "*GHC options")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-replace-character (string from to)
"Replace characters equal to FROM to TO in STRING."
(let ((ret (copy-sequence string)))
(dotimes (cnt (length ret))
(if (char-equal (aref ret cnt) from)
(aset ret cnt to)))
ret))
(defun ghc-replace-character-buffer (from-c to-c)
(let ((from (char-to-string from-c))
(to (char-to-string to-c)))
(save-excursion
(goto-char (point-min))
(while (search-forward from nil t)
(replace-match to)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-unescape-string (str)
(with-temp-buffer
(insert str)
(goto-char (point-min))
(while (search-forward "\\n" nil t) (replace-match "\n" nil t))
(goto-char (point-min))
(while (search-forward "\\\\" nil t) (replace-match "\\" nil t))
(buffer-substring-no-properties (point-min) (point-max))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defmacro ghc-add (sym val)
`(setq ,sym (cons ,val ,sym)))
(defun ghc-set (vars vals)
(dolist (var vars)
(if var (set var (car vals))) ;; var can be nil to skip
(setq vals (cdr vals))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-filter (pred lst)
(let (ret)
(dolist (x lst (reverse ret))
(if (funcall pred x) (ghc-add ret x)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-uniq-lol (lol)
(let ((hash (make-hash-table :test 'equal))
ret)
(dolist (lst lol)
(dolist (key lst)
(puthash key key hash)))
(maphash (lambda (key _val) (ghc-add ret key)) hash)
ret))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-read-lisp (func)
(with-temp-buffer
(funcall func)
(ghc-read-lisp-this-buffer)))
;; OK/NG are ignored.
(defun ghc-read-lisp-this-buffer ()
(save-excursion
(goto-char (point-min))
(condition-case nil
(read (current-buffer))
(error ()))))
(defun ghc-read-lisp-list-this-buffer (n)
(save-excursion
(goto-char (point-min))
(condition-case nil
(let ((m (set-marker (make-marker) 1 (current-buffer)))
ret)
(dotimes (_i n)
(ghc-add ret (read m)))
(nreverse ret))
(error ()))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-mapconcat (func list)
(apply 'append (mapcar func list)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-things-at-point ()
(thing-at-point 'sexp))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-keyword-number-pair (spec)
(let ((len (length spec)) key ret)
(dotimes (i len)
(setq key (intern (concat ":" (symbol-name (car spec)))))
(setq ret (cons (cons key i) ret))
(setq spec (cdr spec)))
(nreverse ret)))
(defmacro ghc-defstruct (type &rest spec)
`(progn
(ghc-defstruct-constructor ,type ,@spec)
(ghc-defstruct-s/getter ,type ,@spec)))
(defmacro ghc-defstruct-constructor (type &rest spec)
`(defun ,(intern (concat "ghc-make-" (symbol-name type))) (&rest args)
(let* ((alist (quote ,(ghc-keyword-number-pair spec)))
(struct (make-list (length alist) nil))
key val key-num)
(while args ;; cannot use dolist
(setq key (car args))
(setq args (cdr args))
(setq val (car args))
(setq args (cdr args))
(unless (keywordp key)
(error "'%s' is not a keyword" key))
(setq key-num (assoc key alist))
(if key-num
(setcar (nthcdr (cdr key-num) struct) val)
(error "'%s' is unknown" key)))
struct)))
(defmacro ghc-defstruct-s/getter (type &rest spec)
`(let* ((type-name (symbol-name ',type))
(keys ',spec)
(len (length keys))
member-name setter getter)
(dotimes (i len)
(setq member-name (symbol-name (car keys)))
(setq setter (intern (format "ghc-%s-set-%s" type-name member-name)))
(fset setter (list 'lambda '(struct value) (list 'setcar (list 'nthcdr i 'struct) 'value) 'struct))
(setq getter (intern (format "ghc-%s-get-%s" type-name member-name)))
(fset getter (list 'lambda '(struct) (list 'nth i 'struct)))
(setq keys (cdr keys)))))
(defun ghc-make-ghc-options ()
(ghc-mapconcat (lambda (x) (list "-g" x)) ghc-ghc-options))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defconst ghc-error-buffer-name "*GHC Info*")
(defun ghc-display (fontify ins-func)
(ghc-display-with-name fontify ins-func ghc-error-buffer-name))
;; (defun ghc-display (fontify ins-func)
;; (let ((buf ghc-error-buffer-name))
;; (with-output-to-temp-buffer buf
;; (with-current-buffer buf
;; (erase-buffer)
;; (funcall ins-func)
;; (goto-char (point-min))
;; (if (not fontify)
;; (turn-off-haskell-font-lock)
;; (haskell-font-lock-defaults-create)
;; (turn-on-haskell-font-lock)))
;; (display-buffer buf
;; '((display-buffer-reuse-window
;; display-buffer-pop-up-window))))))
(defun ghc-display-with-name (fontify ins-func name)
(let ((buf name))
(with-output-to-temp-buffer buf
(with-current-buffer buf
(erase-buffer)
(funcall ins-func)
(goto-char (point-min))
(if (not fontify)
;; turn-off-haskell-font-lock has been removed from haskell-mode
;; test if the function is defined in our version
(if (fboundp 'turn-off-haskell-font-lock)
(turn-off-haskell-font-lock)
;; it's not defined, fallback on font-lock-mode
(font-lock-mode -1))
(haskell-font-lock-defaults-create)
;; turn-on-haskell-font-lock has been removed from haskell-mode
;; test if the function is defined in our version
(if (fboundp 'turn-on-haskell-font-lock)
(turn-on-haskell-font-lock)
;; it's not defined, fallback on font-lock-mode
(turn-on-font-lock))))
(display-buffer buf
'((display-buffer-reuse-window
display-buffer-pop-up-window))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-run-ghc-mod (cmds &optional prog)
(let ((target (or prog ghc-module-command)))
(ghc-executable-find target
(let ((cdir (or ghc-process-root ;; ghc-mod version/debug
default-directory))) ;; ghc-mod root
(with-temp-buffer
(let ((default-directory cdir))
(apply 'ghc-call-process target nil t nil
(append (ghc-make-ghc-options) cmds))
(buffer-substring (point-min) (1- (point-max)))))))))
(defmacro ghc-executable-find (cmd &rest body)
;; (declare (indent 1))
`(if (not (executable-find ,cmd))
(message "\"%s\" not found" ,cmd)
,@body))
(put 'ghc-executable-find 'lisp-indent-function 1)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar ghc-debug nil)
(defvar ghc-debug-buffer "*GHC Debug*")
(defmacro ghc-with-debug-buffer (&rest body)
`(with-current-buffer (set-buffer (get-buffer-create ghc-debug-buffer))
(goto-char (point-max))
,@body))
(defun ghc-call-process (cmd x y z &rest args)
(apply 'call-process cmd x y z args)
(when ghc-debug
(let ((cbuf (current-buffer)))
(ghc-with-debug-buffer
(insert (format "%% %s %s\n" cmd (mapconcat 'identity args " ")))
(insert-buffer-substring cbuf)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-enclose (expr)
(let ((case-fold-search nil))
(if (string-match "^[a-zA-Z0-9_]" expr)
expr
(concat "(" expr ")"))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defmacro ghc-with-current-buffer (buf &rest body)
;; (declare (indent 1))
`(if (buffer-live-p ,buf)
(with-current-buffer ,buf
,@body)))
(provide 'ghc-func)
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