| Brian Silverman | 60e3e2a | 2018-08-04 23:57:12 -0700 | [diff] [blame^] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| 2 | |
| 3 | <html> |
| 4 | <head> |
| 5 | <meta http-equiv="Content-Language" content="en-us"> |
| 6 | <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> |
| 7 | |
| 8 | <title>Assignable</title> |
| 9 | </head> |
| 10 | |
| 11 | <body bgcolor="#FFFFFF" link="#0000EE" text="#000000" vlink="#551A8B" alink= |
| 12 | "#FF0000"> |
| 13 | <img src="../../boost.png" alt="C++ Boost" width="277" height= |
| 14 | "86"><br clear="none"> |
| 15 | |
| 16 | <h1>Assignable</h1> |
| 17 | |
| 18 | <h3>Description</h3> |
| 19 | |
| 20 | <p>A type is Assignable if it is possible to assign one object of the type |
| 21 | to another object of that type.</p> |
| 22 | |
| 23 | <h3>Notation</h3> |
| 24 | |
| 25 | <table summary=""> |
| 26 | <tr> |
| 27 | <td valign="top"><tt>T</tt></td> |
| 28 | |
| 29 | <td valign="top">is type that is a model of Assignable</td> |
| 30 | </tr> |
| 31 | |
| 32 | <tr> |
| 33 | <td valign="top"><tt>t</tt></td> |
| 34 | |
| 35 | <td valign="top">is an object of type <tt>T</tt></td> |
| 36 | </tr> |
| 37 | |
| 38 | <tr> |
| 39 | <td valign="top"><tt>u</tt></td> |
| 40 | |
| 41 | <td valign="top">is an object of type <tt>T</tt> or possibly <tt>const |
| 42 | T</tt></td> |
| 43 | </tr> |
| 44 | </table> |
| 45 | |
| 46 | <h3>Definitions</h3> |
| 47 | |
| 48 | <h3>Valid expressions</h3> |
| 49 | |
| 50 | <table border summary=""> |
| 51 | <tr> |
| 52 | <th>Name</th> |
| 53 | |
| 54 | <th>Expression</th> |
| 55 | |
| 56 | <th>Return type</th> |
| 57 | |
| 58 | <th>Semantics</th> |
| 59 | </tr> |
| 60 | |
| 61 | <tr> |
| 62 | <td valign="top">Assignment</td> |
| 63 | |
| 64 | <td valign="top"><tt>t = u</tt></td> |
| 65 | |
| 66 | <td valign="top"><tt>T&</tt></td> |
| 67 | |
| 68 | <td valign="top"><tt>t</tt> is equivalent to <tt>u</tt></td> |
| 69 | </tr> |
| 70 | </table> |
| 71 | |
| 72 | <h3>Models</h3> |
| 73 | |
| 74 | <ul> |
| 75 | <li><tt>int</tt></li> |
| 76 | |
| 77 | <li><tt>std::pair</tt></li> |
| 78 | </ul> |
| 79 | |
| 80 | <h3>See also</h3> |
| 81 | |
| 82 | <p><a href= |
| 83 | "http://www.sgi.com/tech/stl/DefaultConstructible.html">DefaultConstructible</a> |
| 84 | and <a href="./CopyConstructible.html">CopyConstructible</a><br></p> |
| 85 | <hr> |
| 86 | |
| 87 | <p><a href="http://validator.w3.org/check?uri=referer"><img border="0" src= |
| 88 | "../../doc/images/valid-html401.png" alt="Valid HTML 4.01 Transitional" |
| 89 | height="31" width="88"></a></p> |
| 90 | |
| 91 | <p>Revised |
| 92 | <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan -->05 December, 2006<!--webbot bot="Timestamp" endspan i-checksum="38516" --></p> |
| 93 | |
| 94 | <table summary=""> |
| 95 | <tr valign="top"> |
| 96 | <td nowrap><i>Copyright © 2000</i></td> |
| 97 | |
| 98 | <td><i><a href="http://www.lsc.nd.edu/~jsiek">Jeremy Siek</a>, Univ.of |
| 99 | Notre Dame (<a href= |
| 100 | "mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</a>)</i></td> |
| 101 | </tr> |
| 102 | </table> |
| 103 | |
| 104 | <p><i>Distributed under the Boost Software License, Version 1.0. (See |
| 105 | accompanying file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or |
| 106 | copy at <a href= |
| 107 | "http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</i></p> |
| 108 | </body> |
| 109 | </html> |