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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: System Class CONCATENATED-STREAM</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="t_broadc.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="c_stream.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="t_echo_s.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<A NAME="concatenated-stream"><I>System Class</I> <B>CONCATENATED-STREAM</B></A> <P>
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<P><B>Class Precedence List:</B><P>
<P>
<A REL=DEFINITION HREF="#concatenated-stream"><B>concatenated-stream</B></A>, <A REL=DEFINITION HREF="t_stream.htm#stream"><B>stream</B></A>, <A REL=DEFINITION HREF="t_t.htm#t"><B>t</B></A> <P>
<P><B>Description:</B><P>
<P>
A <A REL=DEFINITION HREF="26_glo_c.htm#concatenated_stream"><I>concatenated stream</I></A> is an <A REL=DEFINITION HREF="26_glo_i.htm#input"><I>input</I></A> <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>stream</I></A> which is a <A REL=DEFINITION HREF="26_glo_c.htm#composite_stream"><I>composite stream</I></A> of zero or more other <A REL=DEFINITION HREF="26_glo_i.htm#input"><I>input</I></A> <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>streams</I></A>, such that the sequence of data which can be read from the <A REL=DEFINITION HREF="26_glo_c.htm#concatenated_stream"><I>concatenated stream</I></A> is the same as the concatenation of the sequences of data which could be read from each of the constituent <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>streams</I></A>. <P>
Input from a <A REL=DEFINITION HREF="26_glo_c.htm#concatenated_stream"><I>concatenated stream</I></A> is taken from the first of the associated <A REL=DEFINITION HREF="26_glo_i.htm#input"><I>input</I></A> <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>streams</I></A> until it reaches <A REL=DEFINITION HREF="26_glo_e.htm#end_of_file"><I>end of file</I></A>[1]; then that <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>stream</I></A> is discarded, and subsequent input is taken from the next <A REL=DEFINITION HREF="26_glo_i.htm#input"><I>input</I></A> <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>stream</I></A>, and so on. An <A REL=DEFINITION HREF="26_glo_e.htm#end_of_file"><I>end of file</I></A> on the associated <A REL=DEFINITION HREF="26_glo_i.htm#input"><I>input</I></A> <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>streams</I></A> is always managed invisibly by the <A REL=DEFINITION HREF="26_glo_c.htm#concatenated_stream"><I>concatenated stream</I></A>---the only time a client of a <A REL=DEFINITION HREF="26_glo_c.htm#concatenated_stream"><I>concatenated stream</I></A> sees an <A REL=DEFINITION HREF="26_glo_e.htm#end_of_file"><I>end of file</I></A> is when an attempt is made to obtain data from the <A REL=DEFINITION HREF="26_glo_c.htm#concatenated_stream"><I>concatenated stream</I></A> but it has no remaining <A REL=DEFINITION HREF="26_glo_i.htm#input"><I>input</I></A> <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>streams</I></A> from which to obtain such data. <P>
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<P><B>See Also:</B><P>
<P>
<A REL=DEFINITION HREF="f_conc_1.htm#concatenated-stream-streams"><B>concatenated-stream-streams</B></A>, <A REL=DEFINITION HREF="f_mk_con.htm#make-concatenated-stream"><B>make-concatenated-stream</B></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/iss327.htm">STREAM-ACCESS:ADD-TYPES-ACCESSORS</A><LI> <A REL=CHILD HREF="../Issues/iss351.htm">TYPE-OF-AND-PREDEFINED-CLASSES:UNIFY-AND-EXTEND</A><P></UL><HR>
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