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;;; haskell-multiedit.el --- Minor mode to edit and evaluate
;;; multi-line scripts of Haskell without making a file
;;; -*- lexical-binding: t; -*-
;; Copyright (C) 2021 Aryadev Chavali
;; Author: Aryadev Chavali <aryadev@aryadevchavali.com>
;; Keywords:
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License version
;; 2 as published by the Free Software Foundation.
;; 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:
;; To be used in a haskell-interactive-mode buffer. It'll generate a
;; new buffer with haskell-mode and this minor mode activated. Once
;; finished with the code, using another keybind to close the buffer
;; and paste the code into haskell-interactive-mode, evaluating it all
;; line by line with indenting and multi-line guards.
;;; Code:
(defvar haskell-multiedit-mode-map
(make-sparse-keymap))
(define-minor-mode haskell-multiedit-mode
"Minor mode for haskell buffers generated by haskell-interactive-mode.
Provides bindings to retrieve content back into the REPL with
full multi-edit commands"
:lighter nil
:keymap haskell-multiedit-mode-map)
(with-eval-after-load "haskell"
(defun haskell-multiedit ()
(interactive)
(haskell-interactive-mode-return)
(switch-to-buffer "*haskell-temp*")
(haskell-mode)
(haskell-multiedit-mode))
(defun haskell-multiedit-evaluate-at-repl ()
(interactive)
(let* ((contents (buffer-string))
(lines (split-string contents "\n")))
(switch-to-buffer (haskell-session-interactive-buffer (haskell-session)))
(insert ":{")
(haskell-interactive-mode-return)
(mapc #'(lambda (line) (insert line) (haskell-interactive-mode-return)) lines)
(insert ":}")
(haskell-interactive-mode-return)))
(define-key haskell-interactive-mode-map (kbd "C-c '") #'haskell-multiedit)
(define-key haskell-multiedit-mode-map (kbd "C-c '") #'haskell-multiedit-evaluate-at-repl))
(provide 'haskell-multiedit)
;;; haskell-interactive-multiedit.el ends here
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