ghc-mod/elisp/ghc-info.el

67 lines
1.9 KiB
EmacsLisp

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; ghc-info.el
;;;
;; Author: Kazu Yamamoto <Kazu@Mew.org>
;; Created: Nov 15, 2010
;;; Code:
(require 'ghc-func)
(defun ghc-show-type (&optional ask)
(interactive "P")
(if (not (ghc-which ghc-module-command))
(message "%s not found" ghc-module-command)
(let ((modname (ghc-find-module-name)))
(if (not modname)
(message "module should be specified")
(ghc-show-type0 ask modname)))))
(defun ghc-show-type0 (ask modname)
(let* ((expr0 (thing-at-point 'symbol))
(expr (if ask (ghc-read-expression expr0) expr0))
(cdir default-directory)
(file (buffer-name)))
(with-temp-buffer
(cd cdir)
(call-process ghc-module-command nil t nil "type" file modname expr)
(message (buffer-substring (point-min) (1- (point-max)))))))
(defun ghc-show-info (&optional ask)
(interactive "P")
(if (not (ghc-which ghc-module-command))
(message "%s not found" ghc-module-command)
(let ((modname (ghc-find-module-name)))
(if (not modname)
(message "module should be specified")
(ghc-show-info0 ask modname)))))
(defun ghc-show-info0 (ask modname)
(let* ((expr0 (thing-at-point 'symbol))
(expr (if ask (ghc-read-expression expr0) expr0))
(cdir default-directory)
(file (buffer-name))
(buf (get-buffer-create ghc-error-buffer-name)))
(with-current-buffer buf
(erase-buffer)
(insert
(with-temp-buffer
(cd cdir)
(call-process ghc-module-command nil t nil "info" file modname expr)
(buffer-substring (point-min) (1- (point-max))))))
(display-buffer buf)))
(defun ghc-read-expression (default)
(let ((prompt (format "Expression (%s): " default)))
(read-string prompt default nil)))
(defun ghc-find-module-name ()
(save-excursion
(goto-char (point-min))
(if (re-search-forward "^module[ ]+\\([^ ]+\\)" nil t)
(match-string-no-properties 1))))
(provide 'ghc-info)