38 lines
5 KiB
HTML
38 lines
5 KiB
HTML
<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
|
|
<HTML>
|
|
<HEAD>
|
|
<TITLE>CLHS: Section 5.1.2.5</TITLE>
|
|
<LINK HREF="../Data/clhs.css" REL="stylesheet" TYPE="text/css" />
|
|
<META HTTP-EQUIV="Author" CONTENT="Kent M. Pitman">
|
|
<META HTTP-EQUIV="Organization" CONTENT="LispWorks Ltd.">
|
|
<LINK REL=TOP HREF="../Front/index.htm">
|
|
<LINK REL=COPYRIGHT HREF="../Front/Help.htm#Legal">
|
|
<LINK REL=DISCLAIMER HREF="../Front/Help.htm#Disclaimer">
|
|
<LINK REL=PREV HREF="05_abd.htm">
|
|
<LINK REL=UP HREF="05_ab.htm">
|
|
<LINK REL=NEXT HREF="05_abf.htm">
|
|
</HEAD>
|
|
<BODY>
|
|
<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="05_abd.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="05_ab.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="05_abf.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
|
|
|
|
<HR>
|
|
|
|
<H2>
|
|
5.1.2.5 APPLY Forms as Places</H2> <P>
|
|
The following situations involving <A REL=DEFINITION HREF="m_setf_.htm#setf"><B>setf</B></A> of <A REL=DEFINITION HREF="f_apply.htm#apply"><B>apply</B></A> must be supported: <P>
|
|
<P><DL><DT>* <TT>(setf (apply #'aref </TT><I>array</I><TT> </TT><I>subscript</I><TT></TT><B>*</B><TT> </TT><I>more-subscripts</I><TT>) </TT><I>new-element</I><TT>)</TT> <DD><DT>* <TT>(setf (apply #'bit </TT><I>array</I><TT> </TT><I>subscript</I><TT></TT><B>*</B><TT> </TT><I>more-subscripts</I><TT>) </TT><I>new-element</I><TT>)</TT> <DD><DT>* <TT>(setf (apply #'sbit </TT><I>array</I><TT> </TT><I>subscript</I><TT></TT><B>*</B><TT> </TT><I>more-subscripts</I><TT>) </TT><I>new-element</I><TT>)</TT> <P><DD></DL><P>
|
|
In all three cases, the <A REL=DEFINITION HREF="26_glo_e.htm#element"><I>element</I></A> of <I>array</I> designated by the concatenation of <I>subscripts</I> and <I>more-subscripts</I> (i.e., the same <A REL=DEFINITION HREF="26_glo_e.htm#element"><I>element</I></A> which would be <A REL=DEFINITION HREF="26_glo_r.htm#read"><I>read</I></A> by the call to <A REL=DEFINITION HREF="26_glo_a.htm#apply"><I>apply</I></A> if it were not part of a <A REL=DEFINITION HREF="m_setf_.htm#setf"><B>setf</B></A> <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>form</I></A>) is changed to have the <A REL=DEFINITION HREF="26_glo_v.htm#value"><I>value</I></A> given by <I>new-element</I>. For these usages, the function name (<A REL=DEFINITION HREF="f_aref.htm#aref"><B>aref</B></A>, <A REL=DEFINITION HREF="f_bt_sb.htm#bit"><B>bit</B></A>, or <A REL=DEFINITION HREF="f_bt_sb.htm#sbit"><B>sbit</B></A>) must refer to the global function definition, rather than a locally defined <A REL=DEFINITION HREF="26_glo_f.htm#function"><I>function</I></A>. <P>
|
|
No other <A REL=DEFINITION HREF="26_glo_s.htm#standardized"><I>standardized</I></A> <A REL=DEFINITION HREF="26_glo_f.htm#function"><I>function</I></A> is required to be supported, but an <A REL=DEFINITION HREF="26_glo_i.htm#implementation"><I>implementation</I></A> may define such support. An <A REL=DEFINITION HREF="26_glo_i.htm#implementation"><I>implementation</I></A> may also define support for <A REL=DEFINITION HREF="26_glo_i.htm#implementation-defined"><I>implementation-defined</I></A> <A REL=DEFINITION HREF="26_glo_o.htm#operator"><I>operators</I></A>. <P>
|
|
If a user-defined <A REL=DEFINITION HREF="26_glo_f.htm#function"><I>function</I></A> is used in this context, the following equivalence is true, except that care is taken to preserve proper left-to-right evaluation of argument <A REL=DEFINITION HREF="26_glo_s.htm#subform"><I>subforms</I></A>: <P>
|
|
<PRE>
|
|
(setf (apply #'name arg*) val)
|
|
== (apply #'(setf name) val arg*)
|
|
</PRE>
|
|
</TT> <P>
|
|
<P><HR>The following <A REL=META HREF="../Front/X3J13Iss.htm">X3J13 cleanup issue</A>, <I>not part of the specification</I>, applies to this section:<P><UL><LI> <A REL=CHILD HREF="../Issues/iss174.htm">FUNCTION-NAME:LARGE</A><P></UL><HR>
|
|
|
|
<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>
|
|
|
|
<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
|
|
</BODY>
|
|
</HTML>
|