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54 linhas
2.1 KiB
54 linhas
2.1 KiB
;;; cider-compat.el --- Functions from newer Emacs versions for compatibility -*- lexical-binding: t -*-
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;; Copyright © 2012-2013 Tim King, Phil Hagelberg, Bozhidar Batsov
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;; Copyright © 2013-2019 Bozhidar Batsov, Artur Malabarba and CIDER contributors
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;;
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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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;; This file is not part of GNU Emacs.
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;;; Commentary:
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;; Everything here was copied from subr-x for compatibility with
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;; Emacs 25.1.
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;;; Code:
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(eval-and-compile
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(unless (fboundp 'if-let*)
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(defmacro if-let* (bindings then &rest else)
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"Process BINDINGS and if all values are non-nil eval THEN, else ELSE.
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Argument BINDINGS is a list of tuples whose car is a symbol to be
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bound and (optionally) used in THEN, and its cadr is a sexp to be
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evalled to set symbol's value."
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(declare (indent 2)
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(debug ([&or (&rest (symbolp form)) (symbolp form)] form body)))
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`(let* ,(internal--build-bindings bindings)
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(if ,(car (internal--listify (car (last bindings))))
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,then
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,@else))))
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(unless (fboundp 'when-let*)
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(defmacro when-let* (bindings &rest body)
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"Process BINDINGS and if all values are non-nil eval BODY.
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Argument BINDINGS is a list of tuples whose car is a symbol to be
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bound and (optionally) used in BODY, and its cadr is a sexp to be
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evalled to set symbol's value."
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(declare (indent 1) (debug if-let*))
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`(if-let* ,bindings ,(macroexp-progn body)))))
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(provide 'cider-compat)
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;;; cider-compat.el ends here
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