emacs - 将模式从正则表达式设置为正则表达式？

这是一个关于 MuMaMo 的问题。如果在 nxhtml/util/mumamo-fun.el 的末尾添加以下代码:

(defun rst-bk-latex-directive-chunk (pos min max)
  "Find math chunks. Return range and 'latex-mode.
See `mumamo-find-possible-chunk' for POS, MIN and MAX."
  (mumamo-quick-static-chunk pos min max ".. math::\n\n" ".." nil 'latex-mode t))

;;;###autoload
(define-mumamo-multi-major-mode rst-bk-mumamo-mode
 "Turn on multiple major modes for Python with RestructuredText docstrings."
 ("ReST" rst-mode
  (
   rst-bk-latex-directive-chunk
   )))

(add-to-list 'auto-mode-alist '("\\.rst\\'" . rst-bk-mumamo-mode))

并且

(load "~/.emacs.d/site-lisp/nxhtml/autostart.el")
(require 'mumamo)
(require 'mumamo-fun)

到 ~/.emacs
字符串 .. math::\n\n 和 .. 之间的块是 latex 模式。

我的问题是 - 如何在给定模式的两个给定正则表达式之间创建一个块？

编辑 :

我已将以下内容添加到 mumamo-fun.el 的末尾:

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;; ReST + math + bash + python + cl

;; LaTeX:

(defun rst-bk-mumamo-math-regexp-chunk-start (pos max)
  (let ((where (mumamo-chunk-start-fw-re pos max
                                         "\\.\\. math::\\(.?\\|\n\\)*?\n\n"
                                         )))
    (when where
      (list where 'latex-mode))))

(defun rst-bk-mumamo-math-regexp-chunk-end (pos max)
  (save-match-data
    (mumamo-chunk-end-fw-re pos max
                            "\\(^[[:blank:]]+$\\|\n\\)+[^[:blank:]\n]"
                            )))

(defun rst-bk-mumamo-math-quick-regexp-chunk (pos
                                  min
                                  max)
  (save-match-data
    (mumamo-possible-chunk-forward pos max 'rst-bk-mumamo-math-regexp-chunk-start
                                           'rst-bk-mumamo-math-regexp-chunk-end)))

(defun rst-bk-mumamo-math-directive (pos min max)
  "Find math chunks. Return range and 'math-mode.
   See `mumamo-find-possible-chunk' for POS, MIN and MAX."
  (rst-bk-mumamo-math-quick-regexp-chunk pos min max))


(defun rst-bk-mumamo-math-inline-chunk (pos min max)
 "Find math chunks.  Return range and 'math-mode.
See `mumamo-find-possible-chunk' for POS, MIN and MAX."
 (mumamo-quick-static-chunk pos min max ":math:`" "`" nil 'math-mode t))


;; bash:

(defun rst-bk-mumamo-sh-regexp-chunk-start (pos max)
  (let ((where (mumamo-chunk-start-fw-re pos max "\\.\\. code-block:: bash\\(.\\|\n\\)*?\n\n")))
    (when where
      (list where 'sh-mode))))

(defun rst-bk-mumamo-sh-regexp-chunk-end (pos max)
  (save-match-data
    (mumamo-chunk-end-fw-re pos max
                            "\\(^[[:blank:]]+$\\|\n\\)+[^[:blank:]\n]"
                            )))

(defun rst-bk-mumamo-sh-quick-regexp-chunk (pos
                                  min
                                  max)
  (save-match-data
    (mumamo-possible-chunk-forward pos max 'rst-bk-mumamo-sh-regexp-chunk-start
                                           'rst-bk-mumamo-sh-regexp-chunk-end)))

(defun rst-bk-mumamo-sh-directive (pos min max)
  "Find math chunks. Return range and 'sh-mode.
   See `mumamo-find-possible-chunk' for POS, MIN and MAX."
  (rst-bk-mumamo-sh-quick-regexp-chunk pos min max))


;; python:

(defun rst-bk-mumamo-py-regexp-chunk-start (pos max)
  (let ((where (mumamo-chunk-start-fw-re pos max "\\.\\. code-block:: py\\(thon\\)?\\(.\\|\n\\)*?\n\n")))
    (when where
      (list where 'python-mode))))

(defun rst-bk-mumamo-py-regexp-chunk-end (pos max)
  (save-match-data
    (mumamo-chunk-end-fw-re pos max "\\(^[[:blank:]]+$\\|\n\\)+[^[:blank:]\n]")))

(defun rst-bk-mumamo-py-quick-regexp-chunk (pos
                                  min
                                  max)
  (save-match-data
    (mumamo-possible-chunk-forward pos max 'rst-bk-mumamo-py-regexp-chunk-start
                                           'rst-bk-mumamo-py-regexp-chunk-end)))

(defun rst-bk-mumamo-py-directive (pos min max)
  "Find math chunks. Return range and 'py-mode.
   See `mumamo-find-possible-chunk' for POS, MIN and MAX."
  (rst-bk-mumamo-py-quick-regexp-chunk pos min max))


;; cl:

(defun rst-bk-mumamo-cl-regexp-chunk-start (pos max)
  (let ((where (mumamo-chunk-start-fw-re pos max "\\.\\. code-block:: cl\\(.\\|\n\\)*?\n\n")))
    (when where
      (list where 'emacs-lisp-mode))))

(defun rst-bk-mumamo-cl-regexp-chunk-end (pos max)
  (save-match-data
    (mumamo-chunk-end-fw-re pos max "\\(^[[:blank:]]+$\\|\n\\)+[^[:blank:]\n]")))

(defun rst-bk-mumamo-cl-quick-regexp-chunk (pos
                                  min
                                  max)
  (save-match-data
    (mumamo-possible-chunk-forward pos max 'rst-bk-mumamo-cl-regexp-chunk-start
                                           'rst-bk-mumamo-cl-regexp-chunk-end)))

(defun rst-bk-mumamo-cl-directive (pos min max)
  "Find math chunks. Return range and 'cl-mode.
   See `mumamo-find-possible-chunk' for POS, MIN and MAX."
  (rst-bk-mumamo-cl-quick-regexp-chunk pos min max))


;;;###autoload
(define-mumamo-multi-major-mode rst-bk-mumamo-mode
  "Turn on multiple major modes for Python with RestructuredText docstrings."
  ("ReST" rst-mode (
                    rst-bk-mumamo-math-directive
                    rst-bk-mumamo-math-inline-chunk
                    rst-bk-mumamo-sh-directive
                    rst-bk-mumamo-py-directive
                    )))

就在 (provide 'mumamo-fun) 之前。

然后在 .emacs 中:

(load "~/.emacs.d/site-lisp/nxhtml/autostart.el")
;; Mumamo is making emacs 23.3 freak out:
(when (and (equal emacs-major-version 23)
           (equal emacs-minor-version 3))
  (eval-after-load "bytecomp"
    '(add-to-list 'byte-compile-not-obsolete-vars
                  'font-lock-beginning-of-syntax-function))
  ;; tramp-compat.el clobbers this variable!
  (eval-after-load "tramp-compat"
    '(add-to-list 'byte-compile-not-obsolete-vars
                  'font-lock-beginning-of-syntax-function)))
(require 'mumamo)
(load "mumamo-fun")

(add-to-list 'auto-mode-alist '("\\.rst\\'" . rst-bk-mumamo-mode))

现在当我打开 ReST 文件时，我有:
math:`TEXT`
LaTeX 模式

.. math:

   TEXT

LaTeX 模式

.. code-block: bash

   TEXT

sh 模式，和

.. code-block: py

   TEXT

python 模式。

编辑 2 :

另外，如果添加

("^   \\(.+\\)" 1 'font-latex-math-face)

后

(dolist (item
         '(("\\(^\\|[^\\]\\)\\(&+\\)" 2 'font-latex-warning-face)
           ("\\$\\$\\([^$]+\\)\\$\\$" 1 'font-latex-math-face)
           ;; HERE
           ...

到 AUCTeX 的 font-latex-make-user-keywords 中的 font-latex.el ，然后将在 .. math:: 下获得数学模式。

最佳答案

关键函数是 mumamo-possible-chunk-forward 与 mumamo-chunk-start-fw-re 和 mumamo-chunk-end-fw-re 的组合——后两者进行正则表达式匹配。

以下是诀窍:

(defun regexp-chunk-start (pos max)
  (let ((where (mumamo-chunk-start-fw-re pos max "math:\n\n")))
    (when where
      (list where 'latex-mode))))

(defun regexp-chunk-end (pos max)
  (save-match-data
    (mumamo-chunk-end-fw-re pos max "\\.\\.")))


(defun mumamo-quick-regexp-chunk (pos
                                  min
                                  max)
  (save-match-data
    (mumamo-possible-chunk-forward pos max 'regexp-chunk-start
                                           'regexp-chunk-end)))


(defun rst-bk-latex-directive (pos min max)
  "Find math chunks. Return range and 'latex-mode.
   See `mumamo-find-possible-chunk' for POS, MIN and MAX."
  (mumamo-quick-regexp-chunk pos min max))

;;;###autoload
(define-mumamo-multi-major-mode rst-bk-mumamo-mode
  "Turn on multiple major modes for Python with RestructuredText docstrings."
  ("ReST" rst-mode (rst-bk-latex-directive)))

(add-to-list 'auto-mode-alist '("\\.rst\\'" . rst-bk-mumamo-mode))

我已经复制了您提供的自动加载内容。坦率地说，我不明白应该如何加载 MuMaMo 主要模式。但是，我能够通过在 ReST 文件中手动调用 mumamo-alias-rst-bk-latex-directive 来测试该功能。

MuMaMo 的 API 有点可惜。匹配缓冲区区域的功能分散在三个独立的功能上，这使得重用变得困难。我希望您在模式匹配工作后可能想要定义许多正则表达式。

所以这是另一个版本，它将所有内容都包含在 marco define-quick-regexp-chunk 中:

(defmacro define-quick-regexp-chunk (regexp-chunk-fun begin-mark end-mark mode)
  (let ((regexp-chunk-start-fun (gensym))
        (regexp-chunk-end-fun (gensym)))
    `(progn
       (defun ,regexp-chunk-start-fun (pos max)
         (let ((where (mumamo-chunk-start-fw-re pos max ,begin-mark)))
           (when where
             (list where ,mode))))

       (defun ,regexp-chunk-end-fun (pos max)
         (save-match-data
           (mumamo-chunk-end-fw-re pos max ,end-mark)))


       (defun ,regexp-chunk-fun (pos
                                 min
                                 max)
         (save-match-data
           (mumamo-possible-chunk-forward pos max ',regexp-chunk-start-fun
                                                  ',regexp-chunk-end-fun))))))

;; switch to latex-mode in between "math:\n\n" ".."
;; defines a function named "rst-bk-latex-directive" which should be called by MuMaMo
(define-quick-regexp-chunk rst-bk-latex-directive "math:\n\n" "\\.\\." 'latex-mode)

;;;###autoload
(define-mumamo-multi-major-mode rst-bk-mumamo-mode
  "Turn on multiple major modes for Python with RestructuredText docstrings."
  ("ReST" rst-mode (rst-bk-latex-directive)))

(add-to-list 'auto-mode-alist '("\\.rst\\'" . rst-bk-mumamo-mode))

它做的完全一样，但现在我可以使用 define-quick-regexp-chunk 轻松定义许多正则表达式分隔的区域。请注意，您必须 double escape the dots ( . ) 。

查看 nxHtml sources (in /util/mumamo-fun.el) 中 noweb2 块的定义，了解如何使用 MuMaMo 的正则表达式函数的更高级示例。