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>delete-package | Common Lisp Nova Spec</TITLE
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><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="delete-package"
></SPAN
><B
>delete-package</B
></TD
><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
><I
>Function</I
></TD
></TR
></TABLE
><HR
></DIV
><UL CLASS="subtoc"
></UL
><DL
><DT
><B
>Syntax</B
></DT
><DD
><P CLASS="j"
><B
>delete-package</B
> <SPAN CLASS="cmssi"
>package</SPAN
> <SPAN CLASS="arrow"
>&#8594;</SPAN
> <SPAN CLASS="cmssi"
>generalized-boolean</SPAN
></P
></DD
><DT
><B
>Arguments and Values</B
></DT
><DD
><P CLASS="j"
><VAR CLASS="param"
>package</VAR
> &#8212; a <A HREF="26_1_Glossary.html#package_designator"
><EM CLASS="term"
>package designator</EM
></A
>. </P
><P CLASS="j"
><VAR CLASS="param"
>generalized-boolean</VAR
> &#8212; a <A HREF="26_1_Glossary.html#generalized_boolean"
><EM CLASS="term"
>generalized boolean</EM
></A
>.</P
></DD
><DT
><B
>Description</B
></DT
><DD
><P CLASS="j"
><A HREF="f_delete-package.html" CLASS="funref"
><B
>delete-package</B
></A
> deletes <VAR CLASS="param"
>package</VAR
> from all package system data structures. If the operation is successful, <A HREF="f_delete-package.html" CLASS="funref"
><B
>delete-package</B
></A
> returns true, otherwise <SPAN CLASS="misc"
><B
>nil</B
></SPAN
>. The effect of <A HREF="f_delete-package.html" CLASS="funref"
><B
>delete-package</B
></A
> is that the name and nicknames of <VAR CLASS="param"
>package</VAR
> cease to be recognized package names. The package <A HREF="26_1_Glossary.html#object"
><EM CLASS="term"
>object</EM
></A
> is still a <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>package</EM
></A
> (<I CLASS="i"
><I
>i.e.</I
></I
>, <A HREF="f_packagep.html" CLASS="funref"
><B
>packagep</B
></A
> is <A HREF="26_1_Glossary.html#true"
><EM CLASS="term"
>true</EM
></A
> of it) but <A HREF="f_package-name.html" CLASS="funref"
><B
>package-name</B
></A
> returns <SPAN CLASS="misc"
><B
>nil</B
></SPAN
>. The consequences of deleting the <SPAN CLASS="packref"
><SPAN CLASS="cmtt"
>COMMON-LISP</SPAN
></SPAN
> <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>package</EM
></A
> or the <SPAN CLASS="packref"
><SPAN CLASS="cmtt"
>KEYWORD</SPAN
></SPAN
> <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>package</EM
></A
> are undefined. The consequences of invoking any other package operation on <VAR CLASS="param"
>package</VAR
> once it has been deleted are unspecified. In particular, the consequences of invoking <A HREF="f_find-symbol.html" CLASS="funref"
><B
>find-symbol</B
></A
>, <A HREF="f_intern.html" CLASS="funref"
><B
>intern</B
></A
> and other functions that look for a symbol name in a <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>package</EM
></A
> are unspecified if they are called with <A HREF="v_package.html" CLASS="varref"
><B
>*package*</B
></A
> bound to the deleted <VAR CLASS="param"
>package</VAR
> or with the deleted <VAR CLASS="param"
>package</VAR
> as an argument. </P
><P CLASS="j"
>If <VAR CLASS="param"
>package</VAR
> is a <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>package</EM
></A
> <A HREF="26_1_Glossary.html#object"
><EM CLASS="term"
>object</EM
></A
> that has already been deleted, <A HREF="f_delete-package.html" CLASS="funref"
><B
>delete-package</B
></A
> immediately returns <SPAN CLASS="misc"
><B
>nil</B
></SPAN
>. </P
><P CLASS="j"
>After this operation completes, the <A HREF="26_1_Glossary.html#home_package"
><EM CLASS="term"
>home package</EM
></A
> of any <A HREF="26_1_Glossary.html#symbol"
><EM CLASS="term"
>symbol</EM
></A
> whose <A HREF="26_1_Glossary.html#home_package"
><EM CLASS="term"
>home package</EM
></A
> had previously been <VAR CLASS="param"
>package</VAR
> is <A HREF="26_1_Glossary.html#implementation-dependent"
><EM CLASS="term"
>implementation-dependent</EM
></A
>. Except for this, <A HREF="26_1_Glossary.html#symbol"
><EM CLASS="term"
>symbols</EM
></A
> <A HREF="26_1_Glossary.html#accessible"
><EM CLASS="term"
>accessible</EM
></A
> in <VAR CLASS="param"
>package</VAR
> are not modified in any other way; <A HREF="26_1_Glossary.html#symbol"
><EM CLASS="term"
>symbols</EM
></A
> whose <A HREF="26_1_Glossary.html#home_package"
><EM CLASS="term"
>home package</EM
></A
> is not <VAR CLASS="param"
>package</VAR
> remain unchanged.</P
></DD
><DT
><B
>Examples</B
></DT
><DD
><PRE CLASS="screen"
> (setq *foo-package* (make-package "FOO" :use nil))
(setq *foo-symbol* (intern "FOO" *foo-package*))
(export *foo-symbol* *foo-package*)
(setq *bar-package* (make-package "BAR" :use '("FOO")))
(setq *bar-symbol* (intern "BAR" *bar-package*))
(export *foo-symbol* *bar-package*)
(export *bar-symbol* *bar-package*)
(setq *baz-package* (make-package "BAZ" :use '("BAR")))
(symbol-package *foo-symbol*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> #&lt;PACKAGE "FOO"&gt;
(symbol-package *bar-symbol*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> #&lt;PACKAGE "BAR"&gt;
(prin1-to-string *foo-symbol*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "FOO:FOO"
(prin1-to-string *bar-symbol*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "BAR:BAR"
(find-symbol "FOO" *bar-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> FOO:FOO, :EXTERNAL
(find-symbol "FOO" *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> FOO:FOO, :INHERITED
(find-symbol "BAR" *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> BAR:BAR, :INHERITED
(packagep *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> <A HREF="26_1_Glossary.html#true"
><EM CLASS="term"
>true</EM
></A
>
(packagep *bar-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> <A HREF="26_1_Glossary.html#true"
><EM CLASS="term"
>true</EM
></A
>
(packagep *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> <A HREF="26_1_Glossary.html#true"
><EM CLASS="term"
>true</EM
></A
>
(package-name *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "FOO"
(package-name *bar-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "BAR"
(package-name *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "BAZ"
(package-use-list *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> ()
(package-use-list *bar-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> (#&lt;PACKAGE "FOO"&gt;)
(package-use-list *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> (#&lt;PACKAGE "BAR"&gt;)
(package-used-by-list *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> (#&lt;PACKAGE "BAR"&gt;)
(package-used-by-list *bar-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> (#&lt;PACKAGE "BAZ"&gt;)
(package-used-by-list *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> ()
(delete-package *bar-package*)
<SPAN CLASS="cmr"
>&#8883;</SPAN
> Error: Package BAZ uses package BAR.
<SPAN CLASS="cmr"
>&#8883;</SPAN
> If continued, BAZ will be made to unuse-package BAR,
<SPAN CLASS="cmr"
>&#8883;</SPAN
> and then BAR will be deleted.
<SPAN CLASS="cmr"
>&#8883;</SPAN
> Type :CONTINUE to continue.
<SPAN CLASS="cmr"
>&#8883;</SPAN
> Debug&gt; <U CLASS="underline"
><SPAN CLASS="cmtt"
>:CONTINUE</SPAN
></U
>
<SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> T
(symbol-package *foo-symbol*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> #&lt;PACKAGE "FOO"&gt;
(symbol-package *bar-symbol*) is unspecified
(prin1-to-string *foo-symbol*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "FOO:FOO"
(prin1-to-string *bar-symbol*) is unspecified
(find-symbol "FOO" *bar-package*) is unspecified
(find-symbol "FOO" *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> NIL, NIL
(find-symbol "BAR" *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> NIL, NIL
(packagep *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> T
(packagep *bar-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> T
(packagep *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> T
(package-name *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "FOO"
(package-name *bar-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> NIL
(package-name *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> "BAZ"
(package-use-list *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> ()
(package-use-list *bar-package*) is unspecified
(package-use-list *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> ()
(package-used-by-list *foo-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> ()
(package-used-by-list *bar-package*) is unspecified
(package-used-by-list *baz-package*) <SPAN CLASS="cmsy"
><SPAN CLASS="arrow"
>&#8594;</SPAN
></SPAN
> ()</PRE
></DD
><DT
><B
>Exceptional Situations</B
></DT
><DD
><P CLASS="j"
>If the <VAR CLASS="param"
>package</VAR
> <A HREF="26_1_Glossary.html#designator"
><EM CLASS="term"
>designator</EM
></A
> is a <A HREF="26_1_Glossary.html#name"
><EM CLASS="term"
>name</EM
></A
> that does not currently name a <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>package</EM
></A
>, a <A HREF="26_1_Glossary.html#correctable"
><EM CLASS="term"
>correctable</EM
></A
> error of <A HREF="26_1_Glossary.html#type"
><EM CLASS="term"
>type</EM
></A
> <A HREF="t_package-error.html" CLASS="typeref"
><B
>package-error</B
></A
> is signaled. If correction is attempted, no deletion action is attempted; instead, <A HREF="f_delete-package.html" CLASS="funref"
><B
>delete-package</B
></A
> immediately returns <SPAN CLASS="misc"
><B
>nil</B
></SPAN
>. </P
><P CLASS="j"
>If <VAR CLASS="param"
>package</VAR
> is used by other <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>packages</EM
></A
>, a <A HREF="26_1_Glossary.html#correctable"
><EM CLASS="term"
>correctable</EM
></A
> error of <A HREF="26_1_Glossary.html#type"
><EM CLASS="term"
>type</EM
></A
> <A HREF="t_package-error.html" CLASS="typeref"
><B
>package-error</B
></A
> is signaled. If correction is attempted, <A HREF="f_unuse-package.html" CLASS="funref"
><B
>unuse-package</B
></A
> is effectively called to remove any dependencies, causing <VAR CLASS="param"
>package</VAR
>&#8217;s <A HREF="26_1_Glossary.html#external_symbol"
><EM CLASS="term"
>external symbols</EM
></A
> to cease being <A HREF="26_1_Glossary.html#accessible"
><EM CLASS="term"
>accessible</EM
></A
> to those <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>packages</EM
></A
> that use <VAR CLASS="param"
>package</VAR
>. <A HREF="f_delete-package.html" CLASS="funref"
><B
>delete-package</B
></A
> then deletes <VAR CLASS="param"
>package</VAR
> just as it would have had there been no <A HREF="26_1_Glossary.html#package"
><EM CLASS="term"
>packages</EM
></A
> that used it.</P
></DD
><DT
><B
>See Also</B
></DT
><DD
><P CLASS="j"
><A HREF="f_unuse-package.html" CLASS="funref"
><B
>unuse-package</B
></A
></P
></DD
></DL
></DIV
></DIV
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><DIV CLASS="btmnav"
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>&#8592;</A
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