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Syntax:
pathnamep object => generalized-boolean
Arguments and Values:
object---an object.
generalized-boolean---a generalized boolean.
Description:
Returns true if object is of type pathname; otherwise, returns false.
Examples:
 (setq q "test")  =>  "test"
 (pathnamep q) =>  false
 (setq q (pathname "test"))
=>  #S(PATHNAME :HOST NIL :DEVICE NIL :DIRECTORY NIL :NAME "test" :TYPE NIL
       :VERSION NIL)
 (pathnamep q) =>  true 
 (setq q (logical-pathname "SYS:SITE;FOO.SYSTEM"))
=>  #P"SYS:SITE;FOO.SYSTEM"
 (pathnamep q) =>  true
 
Side Effects: None.
Affected By: None.
Exceptional Situations: None.
See Also: None.
Notes:
(pathnamep object) == (typep object 'pathname)
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