Packages

See: The Complete Idiot’s Guide to Common Lisp Packages

List all Symbols in a Package

Common Lisp provides some macros to iterate through the symbols of a

package. The two most interesting are:

`DO-SYMBOLS and DO-EXTERNAL-SYMBOLS <http://www.lispworks.com/documentation/HyperSpec/Body/m_do_sym.htm>`__. DO-SYMBOLS iterates over the

symbols accessible in the package and DO-EXTERNAL-SYMBOLS only iterates over

the external symbols (you can see them as the real package API).

To print all exported symbols of a package named “PACKAGE”, you can write:

(do-external-symbols (s (find-package "PACKAGE"))
  (print s))

You can also collect all these symbols in a list by writing:

(let (symbols)
  (do-external-symbols (s (find-package "PACKAGE"))
    (push s symbols))
  symbols)

Or you can do it with `LOOP <http://www.lispworks.com/documentation/HyperSpec/Body/06_a.htm>`__.

(loop for s being the external-symbols of (find-package "PACKAGE")
  collect s)