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<HTML><!--  -- Copyright (c) 1996-1999  -- Silicon Graphics Computer Systems, Inc.  --  -- Permission to use, copy, modify, distribute and sell this software  -- and its documentation for any purpose is hereby granted without fee,  -- provided that the above copyright notice appears in all copies and  -- that both that copyright notice and this permission notice appear  -- in supporting documentation.  Silicon Graphics makes no  -- representations about the suitability of this software for any  -- purpose.  It is provided "as is" without express or implied warranty.  --  -- Copyright (c) 1994  -- Hewlett-Packard Company  --  -- Permission to use, copy, modify, distribute and sell this software  -- and its documentation for any purpose is hereby granted without fee,  -- provided that the above copyright notice appears in all copies and  -- that both that copyright notice and this permission notice appear  -- in supporting documentation.  Hewlett-Packard Company makes no  -- representations about the suitability of this software for any  -- purpose.  It is provided "as is" without express or implied warranty.  --  --><Head><Title>ostream_iterator&lt;T&gt;</Title><!-- Generated by htmldoc --></HEAD><BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b" 	ALINK="#ff0000"> <IMG SRC="CorpID.gif"      ALT="SGI" HEIGHT="43" WIDTH="151"> <!--end header--><BR Clear><H1>ostream_iterator&lt;T&gt;</H1><Table CellPadding=0 CellSpacing=0 width=100%><TR><TD Align=left><Img src = "iterators.gif" Alt=""   WIDTH = "194"  HEIGHT = "38" ></TD><TD Align=right><Img src = "type.gif" Alt=""   WIDTH = "194"  HEIGHT = "39" ></TD></TR><TR><TD Align=left VAlign=top><b>Category</b>: iterators</TD><TD Align=right VAlign=top><b>Component type</b>: type</TD></TR></Table><h3>Description</h3>An <tt>ostream_iterator</tt> is an <A href="OutputIterator.html">Output Iterator</A> that performs formattedoutput of objects of type <tt>T</tt> to a particular <tt>ostream</tt>.  Note that all of therestrictions of an <A href="OutputIterator.html">Output Iterator</A> must be obeyed, including therestrictions on the ordering of <tt>operator*</tt> and <tt>operator++</tt>operations.<h3>Example</h3>Copy the elements of a <tt><A href="Vector.html">vector</A></tt> to the standard output, one per line.<pre><A href="Vector.html">vector</A>&lt;int&gt; V;// ...<A href="copy.html">copy</A>(V.begin(), V.end(), ostream_iterator&lt;int&gt;(cout, &quot;\n&quot;));</pre><h3>Definition</h3>Defined in the standard header <A href="iterator">iterator</A>, and in the nonstandardbackward-compatibility header <A href="iterator.h">iterator.h</A>.<h3>Template parameters</h3><Table border><TR><TH>Parameter</TH><TH>Description</TH><TH>Default</TH></TR><TR><TD VAlign=top><tt>T</tt></TD><TD VAlign=top>The type of object that will be written to the <tt>ostream</tt>.  The   set of value types of an <tt>ostream_iterator</tt> consists of a   single type, <tt>T</tt>.</TD><TD VAlign=top>&nbsp;</TD></tr></table><h3>Model of</h3><A href="OutputIterator.html">Output Iterator</A>.<h3>Type requirements</h3><tt>T</tt> must be a type such that <tt>cout &lt;&lt; T</tt> is a valid expression.<h3>Public base classes</h3>None.<h3>Members</h3><Table border><TR><TH>Member</TH><TH>Where defined</TH><TH>Description</TH></TR><TR><TD VAlign=top><tt>ostream_iterator(ostream&amp;)</tt></TD><TD VAlign=top><tt>ostream_iterator</tt></TD><TD VAlign=top>See below.</TD></TR><TR><TD VAlign=top><tt>ostream_iterator(ostream&amp;, const char* s)</tt></TD><TD VAlign=top><tt>ostream_iterator</tt></TD><TD VAlign=top>See below.</TD></TR><TR><TD VAlign=top><tt>ostream_iterator(const ostream_iterator&amp;)</tt></TD><TD VAlign=top> <A href="OutputIterator.html">Output Iterator</A></TD><TD VAlign=top>The copy constructor</TD></TR><TR><TD VAlign=top><tt>ostream_iterator&amp; operator=(const ostream_iterator&amp;)</tt></TD><TD VAlign=top> <A href="OutputIterator.html">Output Iterator</A></TD><TD VAlign=top>The assignment operator</TD></TR><TR><TD VAlign=top><tt>ostream_iterator&amp; operator=(const T&amp;)</tt></TD><TD VAlign=top> <A href="OutputIterator.html">Output Iterator</A></TD><TD VAlign=top>Used to implement the <A href="OutputIterator.html">Output Iterator</A> requirement   <tt>*i = t</tt>. <A href="#1">[1]</A></TD></TR><TR><TD VAlign=top><tt>ostream_iterator&amp; operator*()</tt></TD><TD VAlign=top> <A href="OutputIterator.html">Output Iterator</A></TD><TD VAlign=top>Used to implement the <A href="OutputIterator.html">Output Iterator</A> requirement   <tt>*i = t</tt>. <A href="#1">[1]</A></TD></TR><TR><TD VAlign=top><tt>ostream_iterator&amp; operator++()</tt></TD><TD VAlign=top> <A href="OutputIterator.html">Output Iterator</A></TD><TD VAlign=top>Preincrement</TD></TR><TR><TD VAlign=top><tt>ostream_iterator&amp; operator++(int)</tt></TD><TD VAlign=top> <A href="OutputIterator.html">Output Iterator</A></TD><TD VAlign=top>Postincrement</TD></TR><TR><TD VAlign=top><tt>output_iterator_tag iterator_category(const ostream_iterator&amp;)</tt></TD><TD VAlign=top> <A href="iterator_tags.html">iterator tags</A></TD><TD VAlign=top>Returns the iterator's category.</TD></tr></table><h3>New members</h3>These members are not defined in the <A href="OutputIterator.html">Output Iterator</A> requirements,but are specific to <tt>ostream_iterator</tt>.<Table border><TR><TH>Function</TH><TH>Description</TH></TR><TR><TD VAlign=top><tt>ostream_iterator(ostream&amp; s)</tt></TD><TD VAlign=top>Creates an <tt>ostream_iterator</tt> such that assignment of <tt>t</tt> through it   is equivalent to <tt>s &lt;&lt; t</tt>.</TD></TR><TR><TD VAlign=top><tt>ostream_iterator(ostream&amp; s, const char* delim)</tt></TD><TD VAlign=top>Creates an <tt>ostream_iterator</tt> such that assignment of <tt>t</tt> through it   is equivalent to <tt>s &lt;&lt; t &lt;&lt; delim</tt>.</TD></tr></table><h3>Notes</h3><P><A name="1">[1]</A>Note how assignment through an <tt>ostream_iterator</tt> is implemented.In general, unary <tt>operator*</tt> must be defined so that it returns aproxy object, where the proxy object defines <tt>operator=</tt> to performthe output operation.  In this case, for the sake of simplicity, theproxy object is the <tt>ostream_iterator</tt> itself.  That is, <tt>*i</tt> simplyreturns <tt>i</tt>, and <tt>*i = t</tt> is equivalent to <tt>i = t</tt>.  You should not,however, rely on this behavior.  It is an implementation detail,and it is not guaranteed to remain the same in future versions.<h3>See also</h3><A href="istream_iterator.html">istream_iterator</A>, <A href="OutputIterator.html">Output Iterator</A>, <A href="InputIterator.html">Input Iterator</A>.<!--start footer--> <HR SIZE="6"><A href="http://www.sgi.com/"><IMG SRC="surf.gif" HEIGHT="54" WIDTH="54"         ALT="[Silicon Surf]"></A><A HREF="index.html"><IMG SRC="stl_home.gif"         HEIGHT="54" WIDTH="54" ALT="[STL Home]"></A><BR><FONT SIZE="-2"><A href="http://www.sgi.com/Misc/sgi_info.html" TARGET="_top">Copyright &copy; 1999 Silicon Graphics, Inc.</A> All Rights Reserved.</FONT><FONT SIZE="-3"><a href="http://www.sgi.com/Misc/external.list.html" TARGET="_top">TrademarkInformation</A></FONT><P></BODY></HTML>
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