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<TITLE>CLHS: Section 6.1.2.1.7</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="06_abaf.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="06_aba.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="06_abaga.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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6.1.2.1.7 The for-as-package subclause</H2> <P>
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In the <I>for-as-package</I> subclause the <TT>for</TT> or <TT>as</TT> construct iterates over the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbols</I></A> in a <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A>. In this syntax, a compound preposition is used to designate access to a <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A>. The variable <I>var</I> takes on the value of each <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> in the supplied <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A>. The following <A REL=DEFINITION HREF="26_glo_l.htm#loop_keyword"><I>loop keywords</I></A> serve as valid prepositions within this syntax: <P>
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<P><DL><P>
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<DT><TT>being</TT> <P><DD>
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The keyword <TT>being</TT> introduces either the Loop schema <TT>symbol</TT>, <TT>present-symbol</TT>, or <TT>external-symbol</TT>. <P>
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<DT><TT>each</TT>, <TT>the</TT> <P><DD>
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The <A REL=DEFINITION HREF="26_glo_l.htm#loop_keyword"><I>loop keyword</I></A> <TT>each</TT> follows the <A REL=DEFINITION HREF="26_glo_l.htm#loop_keyword"><I>loop keyword</I></A> <TT>being</TT> when <TT>symbol</TT>, <TT>present-symbol</TT>, or <TT>external-symbol</TT> is used. The <A REL=DEFINITION HREF="26_glo_l.htm#loop_keyword"><I>loop keyword</I></A> <TT>the</TT> is used with <TT>symbols</TT>, <TT>present-symbols</TT>, and <TT>external-symbols</TT> only for ease of reading. This agreement isn't required. <P>
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<DT><TT>present-symbol</TT>, <TT>present-symbols</TT> <P><DD>
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These Loop schemas iterate over the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbols</I></A> that are <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>. The <I>package</I> to be iterated over is supplied in the same way that <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> arguments to <A REL=DEFINITION HREF="f_find_p.htm#find-package"><B>find-package</B></A> are supplied. If the <I>package</I> for the iteration is not supplied, the <A REL=DEFINITION HREF="26_glo_c.htm#current_package"><I>current package</I></A> is used. If a <I>package</I> that does not exist is supplied, an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_pkg_er.htm#package-error"><B>package-error</B></A> is signaled. <P>
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<DT><TT>symbol</TT>, <TT>symbols</TT> <P><DD>
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These Loop schemas iterate over <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbols</I></A> that are <A REL=DEFINITION HREF="26_glo_a.htm#accessible"><I>accessible</I></A> in a given <I>package</I>. The <I>package</I> to be iterated over is supplied in the same way that <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> arguments to <A REL=DEFINITION HREF="f_find_p.htm#find-package"><B>find-package</B></A> are supplied. If the <I>package</I> for the iteration is not supplied, the <A REL=DEFINITION HREF="26_glo_c.htm#current_package"><I>current package</I></A> is used. If a <I>package</I> that does not exist is supplied, an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_pkg_er.htm#package-error"><B>package-error</B></A> is signaled. <P>
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<DT><TT>external-symbol</TT>, <TT>external-symbols</TT> <P><DD>
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These Loop schemas iterate over the <A REL=DEFINITION HREF="26_glo_e.htm#external_symbol"><I>external symbols</I></A> of a <I>package</I>. The <I>package</I> to be iterated over is supplied in the same way that <A REL=DEFINITION HREF="26_glo_p.htm#package"><I>package</I></A> arguments to <A REL=DEFINITION HREF="f_find_p.htm#find-package"><B>find-package</B></A> are supplied. If the <I>package</I> for the iteration is not supplied, the <A REL=DEFINITION HREF="26_glo_c.htm#current_package"><I>current package</I></A> is used. If a <I>package</I> that does not exist is supplied, an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_pkg_er.htm#package-error"><B>package-error</B></A> is signaled. <P>
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<DT><TT>in</TT>, <TT>of</TT> <P><DD>
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These loop prepositions introduce <I>package</I>. <P>
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<P></DL><P>
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In effect <P>
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<TT>being</TT> {<TT>each</TT> | <TT>the</TT>} {<TT>symbol</TT> | <TT>symbols</TT> | <TT>present-symbol</TT> | <TT>present-symbols</TT> | <TT>external-symbol</TT> | <TT>external-symbols</TT>} {<TT>in</TT> | <TT>of</TT>} <P>
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is a compound preposition. <P>
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Iteration stops when there are no more <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbols</I></A> to be referenced in the supplied <I>package</I>. <P>
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<A REL=CHILD HREF="06_abaga.htm"><H2>
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6.1.2.1.7.1 Examples of for-as-package subclause</H2></A><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/iss225.htm">LOOP-PRESENT-SYMBOLS-TYPO:FLUSH-WRONG-WORDS</A><P></UL><HR>
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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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