std-filep | ![]() |
(std-filep <expr>)
Returns T if the argument is of type FILE, a file object returned by open, or NIL otherwise.
(setq f (std-fopen (findfile "acad.rx") "r")) (std-filep f) => T (std-fclose f) (std-filep f) => T (std-filep 'f) => nil (std-filep nil) => nil
expr: any valid lisp expression
T or nil
None
(std-require 'STDLISP)
Defined in STDLISP.