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30 lines
4.1 KiB
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<TITLE>CLHS: Section 11.1.1.2.2</TITLE>
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<H1><A REV=MADE HREF="http://www.lispworks.com/"><IMG WIDTH=80 HEIGHT=65 ALT="[LISPWORKS]" SRC="../Graphics/LWSmall.gif" ALIGN=Bottom></A><A REL=TOP HREF="../Front/index.htm"><IMG WIDTH=237 HEIGHT=65 ALT="[Common Lisp HyperSpec (TM)]" SRC="../Graphics/CLHS_Sm.gif" ALIGN=Bottom></A> <A REL=PREV HREF="11_aaba.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="11_aab.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="11_aabc.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<H2>
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11.1.1.2.2 Package Inheritance</H2> <P>
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<A REL=DEFINITION HREF="26_glo_p.htm#package"><I>Packages</I></A> can be built up in layers. From one point of view, a <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> is a single collection of mappings from <A REL=DEFINITION HREF="26_glo_s.htm#string"><I>strings</I></A> into <A REL=DEFINITION HREF="26_glo_i.htm#internal_symbol"><I>internal symbols</I></A> and <A REL=DEFINITION HREF="26_glo_e.htm#external_symbol"><I>external symbols</I></A>. However, some of these mappings might be established within the <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> itself, while other mappings are inherited from other <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>packages</I></A> via <A REL=DEFINITION HREF="f_use_pk.htm#use-package"><B>use-package</B></A>. A <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> is said to be <A REL=DEFINITION HREF="26_glo_p.htm#present"><I>present</I></A> in a <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> if the mapping is in the <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> itself and is not inherited from somewhere else. <P>
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There is no way to inherit the <A REL=DEFINITION HREF="26_glo_i.htm#internal_symbol"><I>internal symbols</I></A> of another <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A>; to refer to an <A REL=DEFINITION HREF="26_glo_i.htm#internal_symbol"><I>internal symbol</I></A> using the <A REL=DEFINITION HREF="26_glo_l.htm#lisp_reader"><I>Lisp reader</I></A>, a <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> containing the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> must be made to be the <A REL=DEFINITION HREF="26_glo_c.htm#current_package"><I>current package</I></A>, a <A REL=DEFINITION HREF="26_glo_p.htm#package_prefix"><I>package prefix</I></A> must be used, or the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> must be <I>imported</I> into the <A REL=DEFINITION HREF="26_glo_c.htm#current_package"><I>current package</I></A>. <P>
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<A REL=NAVIGATOR HREF="../Front/StartPts.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Starting Points]" SRC="../Graphics/StartPts.gif" ALIGN=Bottom></A><A REL=TOC HREF="../Front/Contents.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Contents]" SRC="../Graphics/Contents.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Master.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Index]" SRC="../Graphics/Index.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Symbol.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Symbols]" SRC="../Graphics/Symbols.gif" ALIGN=Bottom></A><A REL=GLOSSARY HREF="../Body/26_a.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Glossary]" SRC="../Graphics/Glossary.gif" ALIGN=Bottom></A><A HREF="../Front/X3J13Iss.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Issues]" SRC="../Graphics/Issues.gif" ALIGN=Bottom></A><BR>
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<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
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