====== Function UNEXPORT ====== ====Syntax==== * **unexport** //symbols// ''&optional'' //package// → **[[CL:Constant Variables:t]]** ====Arguments and Values==== * //symbols// - a //[[CL:Glossary:designator]]// for a //[[CL:Glossary:list]]// of //[[CL:Glossary:symbol|symbols]]//. * //package// - a //[[CL:Glossary:package designator]]//. The default is the //[[CL:Glossary:current package]]//. ====Description==== **unexport** reverts external //symbols// in //package// to internal status; it undoes the effect of **[[CL:Functions:export]]**. **unexport** works only on //[[CL:Glossary:symbol|symbols]]// //[[CL:Glossary:present]]// in //package//, switching them back to internal status. If **unexport** is given a //[[CL:Glossary:symbol]]// that is already //[[CL:Glossary:accessible]]// as an //[[CL:Glossary:internal symbol]]// in //package//, it does nothing. ====Examples==== <blockquote> ([[CL:Macros:in-package]] "COMMON-LISP-USER") → #<PACKAGE "COMMON-LISP-USER"> ([[CL:Functions:export]] ([[CL:Functions:intern]] "CONTRABAND" ([[CL:Functions:make-package]] 'temp)) 'temp) → [[CL:Constant Variables:T]] ([[CL:Functions:find-symbol]] "CONTRABAND") → [[CL:Constant Variables:NIL]], [[CL:Constant Variables:NIL]] ([[CL:Functions:use-package]] 'temp) → [[CL:Constant Variables:T]] ([[CL:Functions:find-symbol]] "CONTRABAND") → CONTRABAND, :INHERITED (unexport 'contraband 'temp) → [[CL:Constant Variables:T]] ([[CL:Functions:find-symbol]] "CONTRABAND") → [[CL:Constant Variables:NIL]], [[CL:Constant Variables:NIL]] </blockquote> ====Side Effects==== Package system is modified. ====Affected By==== Current state of the package system. ====Exceptional Situations==== If **unexport** is given a //[[CL:Glossary:symbol]]// not //[[CL:Glossary:accessible]]// in //package// at all, an error of type **[[CL:Types:package-error]]** is signaled. The consequences are undefined if //package// is the **''keyword''** //[[CL:Glossary:package]]// or the **''common-lisp''** //[[CL:Glossary:package]]//. ====See Also==== * **[[CL:Functions:export|Function EXPORT]]**, * {\secref\PackageConcepts} ====Notes==== None. \issue{PACKAGE-FUNCTION-CONSISTENCY:MORE-PERMISSIVE}