11.2.14 unexport [Function]

unexport symbols &optional package => t

Arguments and Values::

symbols—a designator for a list of symbols.

package—a package designator.

The default is the current package.

Description::

unexport reverts external symbols in package to internal status; it undoes the effect of export.

unexport works only on symbols present in package, switching them back to internal status. If unexport is given a symbol that is already accessible as an internal symbol in package, it does nothing.

Examples::

      (in-package "COMMON-LISP-USER") =>  #<PACKAGE "COMMON-LISP-USER">
      (export (intern "CONTRABAND" (make-package 'temp)) 'temp) =>  T
      (find-symbol "CONTRABAND") =>  NIL, NIL
      (use-package 'temp) =>  T
      (find-symbol "CONTRABAND") =>  CONTRABAND, :INHERITED
      (unexport 'contraband 'temp) =>  T
      (find-symbol "CONTRABAND") =>  NIL, NIL

Side Effects::

Package system is modified.

Affected By::

Current state of the package system.

Exceptional Situations::

If unexport is given a symbol not accessible in package at all, an error of type package-error is signaled.

The consequences are undefined if package is the KEYWORD package or the COMMON-LISP package.

See Also::

export , Package Concepts