Question

这很可能是一个愚蠢的问题，但是我没有看到我读过的elisp中的@符号，并且想知道它意味着什么（前面有一个, as好的）code？我认为提供正确的搜索短语有些困难。

如果链接腐烂：

(defmacro zenburn-with-color-variables (&rest body)
  "`let' bind all colors defined in `zenburn-colors-alist' around BODY.
Also bind `class' to ((class color) (min-colors 89))."
  (declare (indent 0))
  `(let ((class '((class color) (min-colors 89)))
         ,@(mapcar (lambda (cons)
                     (list (intern (car cons)) (cdr cons)))
                   zenburn-colors-alist))
     ,@body))

Answer 1

这是一个elisp宏定义，它定义了一个模板，用于在编译时由其他代码替换的代码。一个体面的介绍是Paul Graham的第7章 On Lisp

http://www.paulgraham.com/onlisptext.html

Answer 2

通过检查elisp手册的索引来询问Emacs：

C-h i g (elisp) RET
I @ RET

关注结果：* ,@ (with backquote) [Index]: Backquote. (line 29)

You can also "splice" an evaluated value into the resulting list,
using the special marker ‘,@’.  The elements of the spliced list become
elements at the same level as the other elements of the resulting list.
The equivalent code without using ‘`’ is often unreadable.  Here are
some examples:
[...]

什么`@`在elisp中意味着什么？

2 个答案: