common lisp 的函数 DESCRIBE

describe.txt

语法
  describe object &optional stream => <no values>

参数和值
  object --- 一个 object
  stream --- 一个 output stream,默认为标准输出
  
描述
  describe 将 object 的描述信息输出到 stream

代码
  * (describe '+)

  COMMON-LISP:+
    [symbol]

  + names a special variable:
    Declared type: T
    Value: (DESCRIBE +)
    Documentation:
      the value of the most recent top level READ

  + names a compiled function:
    Lambda-list: (&REST NUMBERS)
    Declared type: (FUNCTION (&REST NUMBER) (VALUES NUMBER &OPTIONAL))
    Derived type: (FUNCTION (&REST T) (VALUES NUMBER &OPTIONAL))
    Documentation:
      Return the sum of its arguments. With no args, returns 0.
    Known attributes: foldable, flushable, unsafely-flushable, movable, explicit-check, commutative
    Source file: SYS:SRC;CODE;NUMBERS.LISP