unexport

ToC

Allegro CL

ANSI Common Lisp

11 Packages

11.2 Dictionary of Packages

11.2.14 unexport

Function

Syntax:

unexport symbols &optional package

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, Section 11.1 Package Concepts

Allegro CL Implementation Details:

None.