83 lines
2.6 KiB
EmacsLisp
83 lines
2.6 KiB
EmacsLisp
;;; -*- lexical-binding: t -*-
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;;; ohai-erlang.el --- Things for working with erlang.
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;; Copyright (C) 2015 Bodil Stokke
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;; Curated and improved by Bernard Notarianni
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'ohai-package)
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;; Let's use the regular erlang-mode
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(package-require 'erlang)
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(defun stripwhite (str)
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"Remove any whitespace from STR."
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(let ((s (if (symbolp str) (symbol-name str) str)))
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(replace-regexp-in-string "[ \t\n]*" "" s)))
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(defun erlang-move-to-export-insertion ()
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(interactive)
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(goto-char (point-max))
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(if (search-backward-regexp "^-export" 0 t)
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(end-of-line)
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(search-backward-regexp "^-" 0 t)
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(end-of-line)))
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(defun erlang-export (fun-arity)
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(interactive
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(list (read-no-blanks-input "function/arity: " (erlang-current-function))))
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(save-excursion
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(erlang-move-to-export-insertion)
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(newline)
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(insert (format "-export ([%s])." fun-arity))))
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;; Find the name of the function under the cursor.
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(defun erlang-current-function ()
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(save-excursion
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(if (not (equal (point) (point-max))) (forward-char))
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(erlang-beginning-of-function)
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(let ((beg (point))
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(fun-name)
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(fun-arity)
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(result '()))
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(search-forward "(")
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(backward-char)
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(setq fun-name (stripwhite (buffer-substring beg (point))))
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(if (char-equal (char-after) ?\))
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(setq fun-arity 0)
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(forward-char)
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(setq fun-arity 0)
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(while (not (char-equal (char-after) ?\)))
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(erlang-forward-arg)
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(setq fun-arity (+ fun-arity 1))))
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(format "%s/%d" fun-name fun-arity))))
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(defun erlang-forward-arg ()
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(forward-sexp))
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;; Setup C-c e to add an export clause for the function under cursor.
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(add-hook 'erlang-mode-hook (lambda () (local-set-key "\C-ce" 'erlang-export)))
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;; Avoid Warning about final newline with Erlang mode
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(add-hook 'erlang-mode-hook
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(lambda ()
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(setq require-final-newline nil)
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(setq mode-require-final-newline nil)))
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(provide 'ohai-erlang)
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