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with-package-iterator Packages Dictionary unintern
Function

unexport

unexport symbols &optional package ⇒ t

Arguments and Values

symbolsa designator for a list of symbols.
packagea 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

Backlinks

Error Terminology, export, find-symbol, Introduction to Packages, Package System Consistency Rules, Packages Dictionary, Prevention of Name Conflicts in Packages, Symbols in the COMMON-LISP Package