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3abe9331 | 2 | Copyright (c) 2000-2015 Ericsson Telecom AB |
970ed795 EL |
3 | |
4 | All rights reserved. This program and the accompanying materials | |
5 | are made available under the terms of the Eclipse Public License v1.0 | |
6 | which accompanies this distribution, and is available at | |
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9 | <html> | |
10 | <head> | |
11 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | |
12 | <meta http-equiv="Content-Language" content="en-us"> | |
13 | <title>deactivate</title> | |
14 | </head> | |
15 | <body bgcolor="#DAD3C5" vlink="#0094D2" link="#003258"> | |
16 | <table align="left" border="0" cellspacing="0" cellpadding="0" valign=top> | |
17 | <tr> | |
18 | <td width=105 height=40><a href="https://projects.eclipse.org/projects/tools.titan"><img src="../images/titan_transparent.gif" border=0 width=105 height=40 align="left" alt="Titan"></a></td> | |
19 | </tr> | |
20 | </table> | |
21 | <table border="0" align="right" cellpadding="0" cellspacing="0"> | |
22 | <tr> | |
23 | <td><a href="../titan_main.html" alt="contents"><img border="0" src="../images/ao.jpg" width="53" height="40"></a></td> | |
24 | <td><a href="../titan_index.html" alt="index"><img border="0" src="../images/up.jpg" width="53" height="40"></a></td> | |
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27 | </tr> | |
28 | </table> | |
29 | <p><br clear="all"> | |
30 | </p> | |
31 | <hr> | |
32 | <h1>deactivate</h1> | |
33 | <hr align="left" width="75%"> | |
34 | <p>The operation is used to deactivate an already activated default context (i.e., an <a href="altstep.html"><b><font face="Courier New" size="4">altstep</font></b></a>).</p> | |
35 | <ul> | |
36 | <li>Default context is a set of branches (cf. <a href="altstep.html"><b><font face="Courier New" size="4">altstep</font></b></a>) that is implicitly appended at the end of all <a | |
37 | href="alt.html"><b><font size="4" face="Courier New">alt</font></b></a> statements (except if the alt has an else branch) and after all stand-alone receive/timeout/done … statements. When no | |
38 | branch of the alt matches the received message, the previously activated default(s) are examined.</li> | |
39 | <li>It is possible to deactivate the activated defaults one by one.</li> | |
40 | </ul> | |
41 | <p>Related keywords:</p> | |
42 | <ul> | |
43 | <li><a href="activate.html"><b><font face="Courier New" color="#003258" size="4">activate</font></b></a></li> | |
44 | <li><a href="alt.html"><b><font face="Courier New" color="#003258" size="4">alt</font></b></a></li> | |
45 | <li><a href="altstep.html"><b><font face="Courier New" color="#003258" size="4">alstep</font></b></a></li> | |
46 | <li><a href="default.html"><b><font face="Courier New" color="#003258" size="4">default</font></b></a></li> | |
47 | <li><a href="null.html"><b><font face="Courier New" color="#003258" size="4">null</font></b></a></li> | |
48 | </ul> | |
49 | <hr align="left" width="50%"> | |
50 | <div align="center"> | |
51 | <center> | |
52 | <table border="0" width="90%" bgcolor="#FFB599" cellpadding="4"> | |
53 | <tr> | |
54 | <td width="100%"> | |
55 | <h3 align="center"><font face="Courier New" color="#003258" size="5"><b>deactivate(</b></font><i>default_ref</i><font face="Courier New" color="#003258" size="5"><b>)</b></font></h3> | |
56 | </td> | |
57 | </tr> | |
58 | </table> | |
59 | </center> | |
60 | </div> | |
61 | <ul> | |
62 | <li> | |
63 | <p><i>default_ref</i> is the default reference referring to the altstep to be deactivated as default. | |
64 | </li> | |
65 | </ul> | |
66 | <hr align="left" width="50%"> | |
67 | <p>Example 1: | |
68 | <p><font face="Courier New">var default vd_Default := null;<br> | |
69 | Default := activate(as_Altstep());<br> | |
70 | deactivate(Default);<br> | |
71 | </font> | |
72 | <p>The variable Default holds the reference to the altstep activated as default (as_Altstep). It is used as argument in the deactivate operation which removes the altstep from the list of | |
73 | activated defaults.</p> | |
74 | <hr align="left" width="25%"> | |
75 | <hr align="left" width="25%"> | |
76 | <p><a HREF="BNF.html#deactivatestatement">BNF definition</a> of <font face="Courier New">deactivate</font></p> | |
77 | </body> | |
78 | </html> |