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new file, based on the C++ standard, not SGI STL's definition of Assignable

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[SVN r8062]
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Jeremy Siek 2000-10-29 21:35:59 +00:00
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<HTML>
<!--
-- Copyright (c) Jeremy Siek 2000
--
-- 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.
-->
<Head>
<Title>Assignable</Title>
</HEAD>
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
ALINK="#ff0000">
<IMG SRC="../../c++boost.gif"
ALT="C++ Boost" width="277" height="86">
<!--end header-->
<BR Clear>
<H1>Assignable</H1>
<h3>Description</h3>
A type is Assignable if it is possible to assign one object of the type
to another object of that type.
<h3>Notation</h3>
<Table>
<TR>
<TD VAlign=top>
<tt>T</tt>
</TD>
<TD VAlign=top>
is type that is a model of Assignable
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>t</tt>
</TD>
<TD VAlign=top>
is an object of type <tt>T</tt>
</TD>
</tr>
<TR>
<TD VAlign=top>
<tt>u</tt>
</TD>
<TD VAlign=top>
is an object of type <tt>T</tt> or possibly <tt>const T</tt>
</TD>
</tr>
</table>
<h3>Definitions</h3>
<h3>Valid expressions</h3>
<Table border>
<TR>
<TH>
Name
</TH>
<TH>
Expression
</TH>
<TH>
Return type
</TH>
<TH>
Semantics
</TH>
</TR>
<TR>
<TD VAlign=top>
Assignment
</TD>
<TD VAlign=top>
<tt>t = u</tt>
</TD>
<TD VAlign=top>
<tt>T&amp;</tt>
</TD>
<TD VAlign=top>
<tt>t</tt> is equivalent to <tt>u</tt>
</TD>
</TR>
</table>
</table>
<h3>Models</h3>
<UL>
<LI><tt>int</tt>
<LI><tt>std::pair</tt>
</UL>
<h3>See also</h3>
<a href="http://www.sgi.com/Technology/STL/DefaultConstructible.html">DefaultConstructible</A>
and
<A href="./CopyConstructible.html">CopyConstructible</A>
<br>
<HR>
<TABLE>
<TR valign=top>
<TD nowrap>Copyright &copy 2000</TD><TD>
<A HREF=http://www.lsc.nd.edu/~jsiek>Jeremy Siek</A>, Univ.of Notre Dame (<A HREF="mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</A>)
</TD></TR></TABLE>
</BODY>
</HTML>