emacs - 如何获得 Emacs lisp 非交互式函数的列表？

Question

如何获得可在 Emacs Lisp 中使用的非交互式函数的完整列表？

交互式功能很容易在帮助系统中找到，但我想要一份我可以使用的所有其他功能的完整列表。例如 concat、car、cdr 等(最好有文档)。

谢谢

埃德

编辑:感谢 Jouni 的回答。我试了一下他的答案，并得到它来对结果进行排序(使用他的代码的结果来帮助我找到正确的排序函数!)

(flet ((first-line (text)
                   (if text
                       (substring text 0 (string-match "\n" text))
                     "")))
  (let ((funclist (list)))
    (mapatoms 
     (lambda (x)
       (and (fboundp x)                     ; does x name a function?
            (not (commandp (symbol-function x))) ; is it non-interactive?
            (subrp (symbol-function x))          ; is it built-in?
            (add-to-list 'funclist 
                         (concat (symbol-name x) " - " (first-line (documentation x))
                                 "\n")))))
    (dolist (item (sort funclist 'string<))
      (insert item))))

Answer 1

这是基本思想 - 请参阅 Emacs Lisp manual对于任何不清楚的概念。

(flet ((first-line (text)
         (if text
             (substring text 0 (string-match "\n" text))
           "")))
  (mapatoms 
   (lambda (x)
     (and (fboundp x)                          ; does x name a function?
          (not (commandp (symbol-function x))) ; is it non-interactive?
          (subrp (symbol-function x))          ; is it built-in?
          (insert (symbol-name x) " - " (first-line (documentation x)) "\n")))))