Emacs正则有没有类似于Vim的"magic mode"

TerryTsao · 2019 年1 月 9 日 08:35

从Vim转Spacemacs中，新手问题，想问一下emacs中有没有类似于Vim中的magic mode。

Vim中，如果这么写正则

:s/\vSOMETHING(.*)/\1

开头的\v称为magic，表示后面()直接理解为正则的group，这样子就不用敲\(\)的反斜杠了，很方便。但貌似evil mode默认不支持，想请问emacs有没有类似的东西，谢谢。

cireu · 2019 年1 月 9 日 08:51

(defvar evil-ex-search-vim-style-regexp)
(setq evil-ex-search-vim-style-regexp t)

在evil-mode启动前设置

github.com

emacs-evil/evil/blob/master/evil-common.el#L3531


      
              (setq range (evil-copy-range range)))
            (unless (plist-get (evil-range-properties range) :expanded)
              (setq range (evil-transform-range :expand range)))
            range)
          
          
(defun evil-contract-range (range &optional copy)
            "Contract RANGE according to its type.
          Return a new range if COPY is non-nil."
            (evil-transform-range :contract range copy))
          
          
(defun evil-normalize-range (range &optional copy)
            "Normalize RANGE according to its type.
          Return a new range if COPY is non-nil."
            (evil-transform-range :normalize range copy))
          
          
(defun evil-transform-range (transform range &optional copy)
            "Apply TRANSFORM to RANGE according to its type.
          Return a new range if COPY is non-nil."
            (when copy
              (setq range (evil-copy-range range)))
            (when (evil-type range)

github.com

emacs-evil/evil/blob/master/evil-common.el#L3649


      
                  (unless (undo-tree-node-next current) (undo-tree-snip-node current)))
              (let ((paste-undo (list nil))
                    (undo-list (if (eq buffer-undo-list t)
                                   evil-temporary-undo
                                 buffer-undo-list)))
                (when (or (not undo-list) (car undo-list))
                  (user-error "Can't undo previous change"))
                (while (and undo-list (null (car undo-list)))
                  (pop undo-list)) ; remove nil
                (while (and undo-list (car undo-list))
                  (push (pop undo-list) paste-undo))
                (let ((buffer-undo-list (nreverse paste-undo)))
                  (evil-save-echo-area
                    (undo)))
                (if (eq buffer-undo-list t)
                    (setq evil-temporary-undo nil)
                  (setq buffer-undo-list undo-list)))))
          
          
;;; Search
          (defun evil-transform-regexp (regexp replacements-alist)
            (replace-regexp-in-string

evil可以处理这些vim正则特有关键字，我没有用过vim，不知道是不是完全实现了

xuchunyang · 2019 年1 月 9 日 08:56

不熟悉 Vim 和 Evil，Emacs 正则表达式没有模式的概念，至于你的问题，一个简单的办法是绑定括号，让其自动输入 \(。

TerryTsao · 2019 年1 月 10 日 00:52

谢谢。还不太会看elisp，才开始用，等我会了慢慢研究

TerryTsao · 2019 年1 月 10 日 01:08

哈哈，我在Spacemacs的Gitter上找到答案了。谢谢两位的回答。

  (setq evil-ex-search-vim-style-regexp t)
  (setq evil-search-module 'evil-search)
  (setq evil-magic 'very-magic)