如何查看Lisp(sbcl)中函数的定义? [英] How can I view the definition of a function in lisp (sbcl)?

问题描述

我使用sbcl+emacs+slime.
我用Lisp编写了一个函数， 我使用C-c C-c编译，但是我已经将其删除.
我找不到我想知道如何定义它.

I use sbcl+emacs+slime.
I writing a function in lisp, I use C-c C-c compile, but i've already deleted it.
I can't find it. I want to know how I define it.

我尝试使用function-lambda-expression，但是我得到了:

I tried use function-lambda-expression, but I get this:

(function-lambda-expression #'b)
T
B

我希望有人能给我一些帮助.非常感谢！

I hope someone can give me some help.Thanks very much in advance!

感谢Vsevolod. 如果在repl中定义了函数，则可以使用(descri #'function-name)来获取定义函数的方式，但是如果我通过C-c C-c对其进行定义，则只会得到source file

Thanks Vsevolod. If function define in repl, i can use (descri #'function-name) get how i define the function, but if i through C-c C-c define it, i just get source file

我的尝试

推荐答案

根据调试和优化的设置，您可能可以通过describe来获取它:

Depending on your settings for debug and optimization you may be able to get it via describe:

CL-USER> (defun f (a) (print a))
F
CL-USER> (describe #'f)
#<FUNCTION F>
  [compiled function]

Lambda-list: (A)
Derived type: (FUNCTION (T) (VALUES T &OPTIONAL))
Source form:
  (SB-INT:NAMED-LAMBDA F
      (A)
    (BLOCK F (PRINT A)))

您可以在Souce form部分中看到定义.

You can see the definition here in the Souce form part.

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