From 915f5639d821be8f1847d80a770840437c358c88 Mon Sep 17 00:00:00 2001 From: Roger Gilliar Date: Mon, 12 Oct 2015 18:56:08 +0200 Subject: [Fix #1348] Remove dash dependency --- cider-compat.el | 160 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 cider-compat.el (limited to 'cider-compat.el') diff --git a/cider-compat.el b/cider-compat.el new file mode 100644 index 00000000..d1307336 --- /dev/null +++ b/cider-compat.el @@ -0,0 +1,160 @@ +;;; cider-compat.el --- Contributed functions from other projects -*- lexical-binding: t -*- + +;; Copyright © 2012-2015 Tim King, Phil Hagelberg +;; Copyright © 2013-2015 Bozhidar Batsov, Hugo Duncan, Steve Purcell +;; + +;; 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 . + +;; This file is not part of GNU Emacs. + +;;; Code: + +;;; copied from subr-x, as a dash replacement + +(eval-and-compile + + (unless (fboundp 'thread-first ) + + (defmacro internal--thread-argument (first? &rest forms) + "Internal implementation for `thread-first' and `thread-last'. +When Argument FIRST? is non-nil argument is threaded first, else +last. FORMS are the expressions to be threaded." + (pcase forms + (`(,x (,f . ,args) . ,rest) + `(internal--thread-argument + ,first? ,(if first? `(,f ,x ,@args) `(,f ,@args ,x)) ,@rest)) + (`(,x ,f . ,rest) `(internal--thread-argument ,first? (,f ,x) ,@rest)) + (_ (car forms)))) + + (defmacro thread-first (&rest forms) + "Thread FORMS elements as the first argument of their successor. +Example: + (thread-first + 5 + (+ 20) + (/ 25) + - + (+ 40)) +Is equivalent to: + (+ (- (/ (+ 5 20) 25)) 40) +Note how the single `-' got converted into a list before +threading." + (declare (indent 1) + (debug (form &rest [&or symbolp (sexp &rest form)]))) + `(internal--thread-argument t ,@forms))) + + (unless (fboundp 'thread-last ) + + (defmacro thread-last (&rest forms) + "Thread FORMS elements as the last argument of their successor. +Example: + (thread-last + 5 + (+ 20) + (/ 25) + - + (+ 40)) +Is equivalent to: + (+ 40 (- (/ 25 (+ 20 5)))) +Note how the single `-' got converted into a list before +threading." + (declare (indent 1) (debug thread-first)) + `(internal--thread-argument nil ,@forms)))) + + +(eval-and-compile + + (unless (fboundp 'internal--listify) + + (defsubst internal--listify (elt) + "Wrap ELT in a list if it is not one." + (if (not (listp elt)) + (list elt) + elt))) + + (unless (fboundp 'internal--check-binding) + + (defsubst internal--check-binding (binding) + "Check BINDING is properly formed." + (when (> (length binding) 2) + (signal + 'error + (cons "`let' bindings can have only one value-form" binding))) + binding)) + + (unless (fboundp 'internal--build-binding-value-form) + + (defsubst internal--build-binding-value-form (binding prev-var) + "Build the conditional value form for BINDING using PREV-VAR." + `(,(car binding) (and ,prev-var ,(cadr binding))))) + + (unless (fboundp ' internal--build-binding) + + (defun internal--build-binding (binding prev-var) + "Check and build a single BINDING with PREV-VAR." + (thread-first + binding + internal--listify + internal--check-binding + (internal--build-binding-value-form prev-var)))) + + (unless (fboundp ' internal--build-bindings) + + (defun internal--build-bindings (bindings) + "Check and build conditional value forms for BINDINGS." + (let ((prev-var t)) + (mapcar (lambda (binding) + (let ((binding (internal--build-binding binding prev-var))) + (setq prev-var (car binding)) + binding)) + bindings))))) + +(eval-and-compile + + (unless (fboundp 'if-let) + + (defmacro if-let (bindings then &rest else) + + "Process BINDINGS and if all values are non-nil eval THEN, else ELSE. +Argument BINDINGS is a list of tuples whose car is a symbol to be +bound and (optionally) used in THEN, and its cadr is a sexp to be +evalled to set symbol's value. In the special case you only want +to bind a single value, BINDINGS can just be a plain tuple." + (declare (indent 2) + (debug ([&or (&rest (symbolp form)) (symbolp form)] form body))) + (when (and (<= (length bindings) 2) + (not (listp (car bindings)))) + ;; Adjust the single binding case + (setq bindings (list bindings))) + `(let* ,(internal--build-bindings bindings) + (if ,(car (internal--listify (car (last bindings)))) + ,then + ,@else))) + + + (defmacro when-let (bindings &rest body) + "Process BINDINGS and if all values are non-nil eval BODY. +Argument BINDINGS is a list of tuples whose car is a symbol to be +bound and (optionally) used in BODY, and its cadr is a sexp to be +evalled to set symbol's value. In the special case you only want +to bind a single value, BINDINGS can just be a plain tuple." + (declare (indent 1) (debug if-let)) + (list 'if-let bindings (macroexp-progn body)))) + + + + ) + +(provide 'cider-compat) -- cgit v1.2.3