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71 lines
2.4 KiB
71 lines
2.4 KiB
9 years ago
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;;; haskell-compat.el --- legacy/compatibility backports for haskell-mode -*- lexical-binding: t -*-
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;;
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;; Filename: haskell-compat.el
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;; Description: legacy/compatibility backports for haskell-mode
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;; This file is not part of GNU Emacs.
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;; This file 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, or (at your option)
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;; any later version.
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;; This file 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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;;; Commentary:
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;;; Code:
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(require 'etags)
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(require 'ring)
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(require 'outline)
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(require 'xref nil t)
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(eval-when-compile
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(setq byte-compile-warnings '(not cl-functions obsolete)))
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;; Missing in Emacs23, stolen from Emacs24's `subr.el'
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(unless (fboundp 'process-live-p)
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(defun process-live-p (process)
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"Returns non-nil if PROCESS is alive.
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A process is considered alive if its status is `run', `open',
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`listen', `connect' or `stop'."
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(memq (process-status process)
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'(run open listen connect stop))))
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;; Cross-referencing commands have been replaced since Emacs 25.1.
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;; These aliases are required to provide backward compatibility.
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(unless (fboundp 'xref-push-marker-stack)
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(defalias 'xref-pop-marker-stack 'pop-tag-mark)
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(defun xref-push-marker-stack (&optional m)
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"Add point to the marker stack."
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(ring-insert find-tag-marker-ring (or m (point-marker)))))
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(unless (fboundp 'outline-hide-sublevels)
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(defalias 'outline-hide-sublevels 'hide-sublevels))
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(unless (fboundp 'outline-show-subtree)
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(defalias 'outline-show-subtree 'show-subtree))
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(unless (fboundp 'outline-hide-sublevels)
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(defalias 'outline-hide-sublevels 'hide-sublevels))
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(unless (fboundp 'outline-show-subtree)
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(defalias 'outline-show-subtree 'show-subtree))
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(unless (fboundp 'xref-find-definitions)
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(defun xref-find-definitions (ident)
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(let ((next-p (and (boundp 'xref-prompt-for-identifier)
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xref-prompt-for-identifier)))
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(find-tag ident next-p))))
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(provide 'haskell-compat)
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;;; haskell-compat.el ends here
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