| [29] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
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| 3 | <html> |
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| 4 | <head> |
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| 5 | <meta http-equiv="Content-Language" content="en-us"> |
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| 6 | <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> |
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| 7 | |
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| 8 | <title>Assignable</title> |
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| 9 | </head> |
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| 10 | |
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| 11 | <body bgcolor="#FFFFFF" link="#0000EE" text="#000000" vlink="#551A8B" alink= |
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| 12 | "#FF0000"> |
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| 13 | <img src="../../boost.png" alt="C++ Boost" width="277" height= |
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| 14 | "86"><br clear="none"> |
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| 15 | |
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| 16 | <h1>Assignable</h1> |
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| 17 | |
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| 18 | <h3>Description</h3> |
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| 19 | |
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| 20 | <p>A type is Assignable if it is possible to assign one object of the type |
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| 21 | to another object of that type.</p> |
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| 22 | |
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| 23 | <h3>Notation</h3> |
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| 24 | |
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| 25 | <table summary=""> |
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| 26 | <tr> |
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| 27 | <td valign="top"><tt>T</tt></td> |
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| 28 | |
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| 29 | <td valign="top">is type that is a model of Assignable</td> |
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| 30 | </tr> |
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| 31 | |
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| 32 | <tr> |
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| 33 | <td valign="top"><tt>t</tt></td> |
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| 34 | |
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| 35 | <td valign="top">is an object of type <tt>T</tt></td> |
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| 36 | </tr> |
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| 37 | |
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| 38 | <tr> |
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| 39 | <td valign="top"><tt>u</tt></td> |
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| 40 | |
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| 41 | <td valign="top">is an object of type <tt>T</tt> or possibly <tt>const |
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| 42 | T</tt></td> |
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| 43 | </tr> |
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| 44 | </table> |
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| 45 | |
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| 46 | <h3>Definitions</h3> |
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| 47 | |
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| 48 | <h3>Valid expressions</h3> |
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| 49 | |
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| 50 | <table border summary=""> |
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| 51 | <tr> |
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| 52 | <th>Name</th> |
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| 53 | |
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| 54 | <th>Expression</th> |
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| 55 | |
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| 56 | <th>Return type</th> |
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| 57 | |
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| 58 | <th>Semantics</th> |
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| 59 | </tr> |
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| 60 | |
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| 61 | <tr> |
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| 62 | <td valign="top">Assignment</td> |
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| 63 | |
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| 64 | <td valign="top"><tt>t = u</tt></td> |
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| 65 | |
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| 66 | <td valign="top"><tt>T&</tt></td> |
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| 67 | |
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| 68 | <td valign="top"><tt>t</tt> is equivalent to <tt>u</tt></td> |
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| 69 | </tr> |
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| 70 | </table> |
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| 71 | |
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| 72 | <h3>Models</h3> |
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| 73 | |
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| 74 | <ul> |
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| 75 | <li><tt>int</tt></li> |
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| 76 | |
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| 77 | <li><tt>std::pair</tt></li> |
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| 78 | </ul> |
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| 79 | |
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| 80 | <h3>See also</h3> |
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| 81 | |
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| 82 | <p><a href= |
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| 83 | "http://www.sgi.com/tech/stl/DefaultConstructible.html">DefaultConstructible</a> |
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| 84 | and <a href="./CopyConstructible.html">CopyConstructible</a><br></p> |
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| 85 | <hr> |
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| 86 | |
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| 87 | <p><a href="http://validator.w3.org/check?uri=referer"><img border="0" src= |
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| 88 | "http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01 Transitional" |
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| 89 | height="31" width="88"></a></p> |
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| 90 | |
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| 91 | <p>Revised |
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| 92 | <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan -->05 December, 2006<!--webbot bot="Timestamp" endspan i-checksum="38516" --></p> |
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| 93 | |
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| 94 | <table summary=""> |
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| 95 | <tr valign="top"> |
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| 96 | <td nowrap><i>Copyright © 2000</i></td> |
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| 97 | |
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| 98 | <td><i><a href="http://www.lsc.nd.edu/~jsiek">Jeremy Siek</a>, Univ.of |
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| 99 | Notre Dame (<a href= |
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| 100 | "mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</a>)</i></td> |
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| 101 | </tr> |
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| 102 | </table> |
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| 103 | |
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| 104 | <p><i>Distributed under the Boost Software License, Version 1.0. (See |
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| 105 | accompanying file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or |
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| 106 | copy at <a href= |
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| 107 | "http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</i></p> |
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| 108 | </body> |
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| 109 | </html> |
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