A JavaScript development environment for Emacs https://indium.readthedocs.io
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;;; indium-seq-fix.el --- Patches for seq.el -*- lexical-binding: t; -*-
;; Copyright (C) 2017-2018 Nicolas Petton
;; Author: Nicolas Petton <nicolas@petton.fr>
;; Keywords:
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
;; HACK: In Emacs 25.1, an older version of seq.el is provided, which can be
;; loaded before indium or even package.el. If this happens, the feature `seq'
;; being already provided, the correct version of seq.el won't get loaded.
(require 'seq)
(unless (fboundp 'seq-map-indexed)
(defun seq-map-indexed (function sequence)
"Return the result of applying FUNCTION to each element of SEQUENCE.
Unlike `seq-map', FUNCTION takes two arguments: the element of
the sequence, and its index within the sequence."
(let ((index 0))
(seq-map (lambda (elt)
(prog1
(funcall function elt index)
(setq index (1+ index))))
sequence))))
(provide 'indium-seq-fix)
;;; indium-seq-fix.el ends here