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<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
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<TITLE>CLHS: Section 11.1.2.1.2</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_abaa.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="11_aba.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="11_ababa.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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11.1.2.1.2 Constraints on the COMMON-LISP Package for Conforming Programs</H2> Except where explicitly allowed, the consequences are undefined if any of the following actions are performed on an <A REL=DEFINITION HREF="26_glo_e.htm#external_symbol"><I>external symbol</I></A> of the <TT>COMMON-LISP</TT> package: <P>
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<P><DL><P>
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<DT>1. <A REL=DEFINITION HREF="26_glo_b.htm#binding"><I>Binding</I></A> or altering its value (lexically or dynamically). (Some exceptions are noted below.) <P><DD>
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<DT>2. Defining, undefining, or <A REL=DEFINITION HREF="26_glo_b.htm#binding"><I>binding</I></A> it as a <A REL=DEFINITION HREF="26_glo_f.htm#function"><I>function</I></A>. (Some exceptions are noted below.) <P><DD>
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<DT>3. Defining, undefining, or <A REL=DEFINITION HREF="26_glo_b.htm#binding"><I>binding</I></A> it as a <A REL=DEFINITION HREF="26_glo_m.htm#macro"><I>macro</I></A> or <A REL=DEFINITION HREF="26_glo_c.htm#compiler_macro"><I>compiler macro</I></A>. (Some exceptions are noted below.) <P><DD>
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<DT>4. Defining it as a <A REL=DEFINITION HREF="26_glo_t.htm#type_specifier"><I>type specifier</I></A> (via <A REL=DEFINITION HREF="m_defstr.htm#defstruct"><B>defstruct</B></A>, <A REL=DEFINITION HREF="m_defcla.htm#defclass"><B>defclass</B></A>, <A REL=DEFINITION HREF="m_deftp.htm#deftype"><B>deftype</B></A>, <A REL=DEFINITION HREF="m_defi_5.htm#define-condition"><B>define-condition</B></A>). <P><DD>
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<DT>5. Defining it as a structure (via <A REL=DEFINITION HREF="m_defstr.htm#defstruct"><B>defstruct</B></A>). <P><DD>
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<DT>6. Defining it as a <A REL=DEFINITION HREF="26_glo_d.htm#declaration"><I>declaration</I></A> with a <A REL=DEFINITION HREF="d_declar.htm#declaration"><B>declaration</B></A> <A REL=DEFINITION HREF="26_glo_p.htm#proclamation"><I>proclamation</I></A>. <P><DD>
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<DT>7. Defining it as a <A REL=DEFINITION HREF="26_glo_s.htm#symbol_macro"><I>symbol macro</I></A>. <P><DD>
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<DT>8. Altering its <A REL=DEFINITION HREF="26_glo_h.htm#home_package"><I>home package</I></A>. <P><DD>
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<DT>9. Tracing it (via <A REL=DEFINITION HREF="m_tracec.htm#trace"><B>trace</B></A>). <P><DD>
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<DT>10. Declaring or proclaiming it <A REL=DEFINITION HREF="d_specia.htm#special"><B>special</B></A> (via <A REL=DEFINITION HREF="s_declar.htm#declare"><B>declare</B></A>, <A REL=DEFINITION HREF="m_declai.htm#declaim"><B>declaim</B></A>, or <A REL=DEFINITION HREF="f_procla.htm#proclaim"><B>proclaim</B></A>). <P><DD>
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<DT>11. Declaring or proclaiming its <A REL=DEFINITION HREF="d_type.htm#type"><B>type</B></A> or <A REL=DEFINITION HREF="d_ftype.htm#ftype"><B>ftype</B></A> (via <A REL=DEFINITION HREF="s_declar.htm#declare"><B>declare</B></A>, <A REL=DEFINITION HREF="m_declai.htm#declaim"><B>declaim</B></A>, or <A REL=DEFINITION HREF="f_procla.htm#proclaim"><B>proclaim</B></A>). (Some exceptions are noted below.) <P><DD>
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<DT>12. Removing it from the <TT>COMMON-LISP</TT> package. <P><DD>
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<P>
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<DT>13. Defining a <A REL=DEFINITION HREF="26_glo_s.htm#setf_expander"><I>setf expander</I></A> for it (via <A REL=DEFINITION HREF="m_defset.htm#defsetf"><B>defsetf</B></A> or <B>define-setf-method</B>). <P><DD>
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<DT>14. Defining, undefining, or binding its <A REL=DEFINITION HREF="26_glo_s.htm#setf_function_name"><I>setf function name</I></A>. <P><DD>
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<DT>15. Defining it as a <A REL=DEFINITION HREF="26_glo_m.htm#method_combination"><I>method combination</I></A> type (via <A REL=DEFINITION HREF="m_defi_4.htm#define-method-combination"><B>define-method-combination</B></A>). <P><DD>
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<DT>16. Using it as the class-name argument to <A REL=DEFINITION HREF="m_setf_.htm#setf"><B>setf</B></A> of <A REL=DEFINITION HREF="f_find_c.htm#find-class"><B>find-class</B></A>. <P><DD>
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<DT>17. Binding it as a <A REL=DEFINITION HREF="26_glo_c.htm#catch_tag"><I>catch tag</I></A>. <P><DD>
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<DT>18. Binding it as a <A REL=DEFINITION HREF="26_glo_r.htm#restart"><I>restart</I></A> <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>name</I></A>. <P><DD>
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<DT>19. Defining a <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> for a <A REL=DEFINITION HREF="26_glo_s.htm#standardized"><I>standardized</I></A> <A REL=DEFINITION HREF="26_glo_g.htm#generic_function"><I>generic function</I></A> which is <A REL=DEFINITION HREF="26_glo_a.htm#applicable"><I>applicable</I></A> when all of the <A REL=DEFINITION HREF="26_glo_a.htm#argument"><I>arguments</I></A> are <A REL=DEFINITION HREF="26_glo_d.htm#direct_instance"><I>direct instances</I></A> of <A REL=DEFINITION HREF="26_glo_s.htm#standardized"><I>standardized</I></A> <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A>. <P><DD>
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<P>
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<P></DL><P>
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<A REL=CHILD HREF="11_ababa.htm"><H2>
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11.1.2.1.2.1 Some Exceptions to Constraints on the COMMON-LISP Package for Conforming Programs</H2></A><P><P><HR>The following <A REL=META HREF="../Front/X3J13Iss.htm">X3J13 cleanup issues</A>, <I>not part of the specification</I>, apply to this section:<P><UL><LI> <A REL=CHILD HREF="../Issues/iss278.htm">PROCLAIM-ETC-IN-COMPILE-FILE:NEW-MACRO</A><LI> <A REL=CHILD HREF="../Issues/iss101.htm">DEFINE-COMPILER-MACRO:X3J13-NOV89</A><LI> <A REL=CHILD HREF="../Issues/iss213.htm">LISP-SYMBOL-REDEFINITION-AGAIN:MORE-FIXES</A><LI> <A REL=CHILD HREF="../Issues/iss214.htm">LISP-SYMBOL-REDEFINITION:MAR89-X3J13</A><P></UL><HR>
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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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