使用常见的lisp,你可以添加许多文档字符串,例如:
CL-USER> (defun foo ()
"doc string for foo"
nil)
FOO
CL-USER> (documentation 'foo 'function)
"doc string for foo"
CL-USER> (describe 'foo)
COMMON-LISP-USER::FOO
[symbol]
FOO names a compiled function:
Lambda-list: ()
Derived type: (FUNCTION NIL (VALUES NULL &OPTIONAL))
Documentation:
doc string for foo
Source form:
(SB-INT:NAMED-LAMBDA FOO
NIL
"doc string for foo"
(BLOCK FOO NIL))
; No value
所以最后我可以读回文档字符串了,但是有了符号和变量,我无法用文档取回它:
CL-USER> (defparameter bar 3 "doc string for bar")
BAR
CL-USER> (describe 'bar)
COMMON-LISP-USER::BAR
[symbol]
BAR names a special variable:
Value: 3
Documentation:
doc string for bar
; No value
CL-USER> (documentation 'bar 'symbol)
WARNING: unsupported DOCUMENTATION: doc-type SYMBOL for object of type SYMBOL
NIL
所以类型'符号是错误的,或者我会使用哪种类型。我不确定到底发生了什么
我正在使用:SBCL 1.3.10
答案 0 :(得分:9)
让我们看看documentation
; - )
CL-USER> (documentation 'documentation 'function)
"Return the documentation string of Doc-Type for X, or NIL if none
exists. System doc-types are VARIABLE, FUNCTION, STRUCTURE, TYPE, SETF, and T.
[...]"
所以:
CL-USER> (documentation 'bar 'variable)
"doc string for bar"
有关详细信息,请参阅documentation
。