<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
	<link rel="stylesheet" type="text/css" href="http://oldforge.etsi.org/mantis/css/default.css" />
	<script type="text/javascript"><!--
		if(document.layers) {document.write("<style>td{padding:0px;}<\/style>")}
	// --></script>
	<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
	<meta http-equiv="Pragma" content="no-cache" />
	<meta http-equiv="Cache-Control" content="no-cache" />
	<meta http-equiv="Pragma-directive" content="no-cache" />
	<meta http-equiv="Cache-Directive" content="no-cache" />
	<meta http-equiv="Expires" content="Tue, 17 Dec 2024 09:15:05 GMT" />
	<link rel="shortcut icon" href="/mantis/images/favicon.ico" type="image/x-icon" />
	<link rel="search" type="application/opensearchdescription+xml" title="MantisBT: Text Search" href="http://oldforge.etsi.org/mantis/browser_search_plugin.php?type=text" />	<link rel="search" type="application/opensearchdescription+xml" title="MantisBT: Issue Id" href="http://oldforge.etsi.org/mantis/browser_search_plugin.php?type=id" />	<title>0007682: Table with index-operators using keys as indices should be supported - ETSI's Bug Tracker</title>
<script type="text/javascript" src="/mantis/javascript/min/common.js"></script>
<script type="text/javascript">var loading_lang = "Loading...";</script><script type="text/javascript" src="/mantis/javascript/min/ajax.js"></script>
</head>
<body>
<br /><table class="width100" cellspacing="1"><tr><td class="form-title" colspan="6"><div class="center">ETSI's Bug Tracker - Part 01: TTCN-3 Core Language</div></td></tr><tr><td class="form-title" colspan="6">View Issue Details</td></tr><tr><td class="print-spacer" colspan="6"><hr size="1" /></td></tr><tr class="print-category"><td class="print" width="16%">ID</td><td class="print" width="16%">Project</td><td class="print" width="16%">Category</td><td class="print" width="16%">View Status</td><td class="print" width="16%">Date Submitted</td><td class="print" width="16%">Last Update</td></tr><tr class="print"><td class="print">0007682</td><td class="print">Part 01: TTCN-3 Core Language</td><td class="print">New Feature</td><td class="print">public</td><td class="print">09-06-2017 14:30</td><td class="print">28-12-2019 15:07</td></tr><tr><td class="print-spacer" colspan="6"><hr size="1" /></td></tr><tr class="print"><td class="print-category">Reporter</td><td class="print">Jacob Wieland - Spirent</td><td class="print" colspan="4">&#160;</td></tr><tr class="print"><td class="print-category">Assigned To</td><td class="print">Gyorgy Rethy</td><td class="print" colspan="4">&#160;</td></tr><tr class="print"><td class="print-category">Priority</td><td class="print">normal</td><td class="print-category">Severity</td><td class="print">minor</td><td class="print-category">Reproducibility</td><td class="print">have not tried</td></tr><tr class="print"><td class="print-category">Status</td><td class="print">closed</td><td class="print-category">Resolution</td><td class="print">fixed</td><td class="print" colspan="2">&#160;</td></tr><tr class="print"><td class="print-category">Platform</td><td class="print"></td><td class="print-category">OS</td><td class="print"></td><td class="print-category">OS Version</td><td class="print"></td></tr><tr class="print"><td class="print-category">Product Version</td><td class="print">v4.9.1 (published 2017-05)</td><td class="print" colspan="4">&#160;</td></tr><tr><td class="print-category">Target Version</td><td class="print">4.11.1 (published 2019-05)</td><td class="print-category">Fixed in Version</td><td class="print">4.12.1 (published 2020-05)</td><td class="print" colspan="2">&#160;</td></tr><tr class="print"><td class="print-category">Clause Reference(s)</td><td class="print" colspan="4">6.2</td></tr><tr class="print"><td class="print-category">Source  (company  - Author)</td><td class="print" colspan="4">Spirent Jacob Wieland</td></tr><tr><td class="print-spacer" colspan="6"><hr size="1" /></td></tr><tr class="print"><td class="print-category">Summary</td><td class="print" colspan="5">0007682: Table with index-operators using keys as indices should be supported</td></tr><tr class="print"><td class="print-category">Description</td><td class="print" colspan="5">Tables (or Dictionaries) that associate unique keys with values are a central programming tool in any programming language useful for multitude of algorithms. <br />
<br />
A table type concept should be introduced in TTCN-3 to allow definition and usage of tables. <br />
<br />
The basic type definiton could look like this:<br />
<br />
type table T from IndexType to ValueType;<br />
<br />
Operations on table variables would be:<br />
- indexing: t[key] where key needs to be of type IndexType<br />
&#160;&#160;on the right hand side it yields the value associated with key of ValueType<br />
&#160;&#160;on the left hand side it associates a new value with the key<br />
&#160;&#160;If key is not associated to any value, either omit or null could be the result (and could also be used to delete entries from the table).<br />
<br />
The index-assignment syntax could be used as a table-value notation:<br />
<br />
{ [key1] := value1,<br />
&#160;&#160;[key2] := value2,<br />
&#160;&#160;...<br />
}<br />
<br />
The same properties as for record of values would apply, record ofs being essentially a special table with integer as key.<br />
<br />
At first, this new type needs not to be considered in the context of codecs and TCI because they are to be used for easing implementation of testcases, not as messages.</td></tr><tr class="print"><td class="print-category">Steps To Reproduce</td><td class="print" colspan="5"></td></tr><tr class="print"><td class="print-category">Additional Information</td><td class="print" colspan="5"></td></tr><tr class="print"><td class="print-category">Tags</td><td class="print" colspan="5">No tags attached.</td></tr><tr class="print"><td class="print-category">Relationships</td><td class="print" colspan="5"></td></tr><tr class="print"><td class="print-category">Attached Files</td><td class="print" colspan="5"><img src="http://oldforge.etsi.org/mantis/images/fileicons/doc.gif" alt="docx" />&#160;CR7682.docx (263,410) <span class="italic">09-08-2019 10:53</span><br />http://oldforge.etsi.org/mantis/file_download.php?file_id=3851&amp;type=bug<br /><img src="http://oldforge.etsi.org/mantis/images/fileicons/doc.gif" alt="docx" />&#160;CR7682-2.docx (254,596) <span class="italic">16-12-2019 12:22</span><br />http://oldforge.etsi.org/mantis/file_download.php?file_id=3869&amp;type=bug</td></tr><tr><td class="print-spacer" colspan="6"><hr size="1" /></td></tr><tr><td class="form-title">Issue History</td></tr><tr class="print-category"><td class="row-category-history">Date Modified</td><td class="row-category-history">Username</td><td class="row-category-history">Field</td><td class="row-category-history">Change</td></tr><tr class="print"><td class="print">09-06-2017 14:30</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">New Issue</td><td class="print"></td></tr><tr class="print"><td class="print">09-06-2017 14:30</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Status</td><td class="print">new =&gt; assigned</td></tr><tr class="print"><td class="print">09-06-2017 14:30</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Assigned To</td><td class="print"> =&gt; Jacob Wieland - Spirent</td></tr><tr class="print"><td class="print">09-06-2017 15:45</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Status</td><td class="print">assigned =&gt; new</td></tr><tr class="print"><td class="print">04-09-2017 09:25</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a></td><td class="print">Note Added: 0014804</td><td class="print"></td></tr><tr class="print"><td class="print">04-09-2017 09:26</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a></td><td class="print">Status</td><td class="print">new =&gt; assigned</td></tr><tr class="print"><td class="print">24-10-2017 12:48</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a></td><td class="print">Note Added: 0014845</td><td class="print"></td></tr><tr class="print"><td class="print">24-10-2017 12:48</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a></td><td class="print">Assigned To</td><td class="print">Jacob Wieland - Spirent =&gt; Jens Grabowski</td></tr><tr class="print"><td class="print">05-01-2018 13:29</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a></td><td class="print">Target Version</td><td class="print">v4.10.1 (published 2018-05) =&gt; 4.11.1 (published 2019-05)</td></tr><tr class="print"><td class="print">06-08-2019 12:54</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Note Added: 0015375</td><td class="print"></td></tr><tr class="print"><td class="print">08-08-2019 14:20</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Note Added: 0015434</td><td class="print"></td></tr><tr class="print"><td class="print">08-08-2019 14:20</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Assigned To</td><td class="print">Jens Grabowski =&gt; Jacob Wieland - Spirent</td></tr><tr class="print"><td class="print">09-08-2019 10:53</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">File Added: CR7682.docx</td><td class="print"></td></tr><tr class="print"><td class="print">09-08-2019 10:56</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Note Added: 0015439</td><td class="print"></td></tr><tr class="print"><td class="print">09-08-2019 10:56</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Assigned To</td><td class="print">Jacob Wieland - Spirent =&gt; Tomas Urban</td></tr><tr class="print"><td class="print">09-08-2019 10:56</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Status</td><td class="print">assigned =&gt; confirmed</td></tr><tr class="print"><td class="print">13-08-2019 16:44</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Note Added: 0015440</td><td class="print"></td></tr><tr class="print"><td class="print">14-08-2019 09:47</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Note Added: 0015441</td><td class="print"></td></tr><tr class="print"><td class="print">14-08-2019 12:52</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Note Added: 0015442</td><td class="print"></td></tr><tr class="print"><td class="print">23-08-2019 15:05</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Note Added: 0015447</td><td class="print"></td></tr><tr class="print"><td class="print">26-08-2019 08:19</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Note Added: 0015448</td><td class="print"></td></tr><tr class="print"><td class="print">26-08-2019 09:49</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Note Added: 0015449</td><td class="print"></td></tr><tr class="print"><td class="print">26-08-2019 11:25</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Note Added: 0015456</td><td class="print"></td></tr><tr class="print"><td class="print">26-08-2019 11:26</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Assigned To</td><td class="print">Tomas Urban =&gt; Jacob Wieland - Spirent</td></tr><tr class="print"><td class="print">26-08-2019 11:26</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Status</td><td class="print">confirmed =&gt; assigned</td></tr><tr class="print"><td class="print">16-12-2019 12:12</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">File Added: CR7682-2.docx</td><td class="print"></td></tr><tr class="print"><td class="print">16-12-2019 12:22</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">File Deleted: CR7682-2.docx</td><td class="print"></td></tr><tr class="print"><td class="print">16-12-2019 12:22</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">File Added: CR7682-2.docx</td><td class="print"></td></tr><tr class="print"><td class="print">16-12-2019 12:24</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Note Added: 0015520</td><td class="print"></td></tr><tr class="print"><td class="print">16-12-2019 12:24</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Assigned To</td><td class="print">Jacob Wieland - Spirent =&gt; KristÃ³f Szabados</td></tr><tr class="print"><td class="print">16-12-2019 12:24</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a></td><td class="print">Status</td><td class="print">assigned =&gt; confirmed</td></tr><tr class="print"><td class="print">17-12-2019 09:00</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Note Added: 0015539</td><td class="print"></td></tr><tr class="print"><td class="print">17-12-2019 09:00</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Status</td><td class="print">confirmed =&gt; resolved</td></tr><tr class="print"><td class="print">17-12-2019 09:00</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Fixed in Version</td><td class="print"> =&gt; 4.11.1 (published 2019-05)</td></tr><tr class="print"><td class="print">17-12-2019 09:00</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a></td><td class="print">Resolution</td><td class="print">open =&gt; fixed</td></tr><tr class="print"><td class="print">28-12-2019 12:54</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a></td><td class="print">Assigned To</td><td class="print">KristÃ³f Szabados =&gt; Gyorgy Rethy</td></tr><tr class="print"><td class="print">28-12-2019 12:54</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a></td><td class="print">Status</td><td class="print">resolved =&gt; assigned</td></tr><tr class="print"><td class="print">28-12-2019 15:07</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a></td><td class="print">Note Added: 0015588</td><td class="print"></td></tr><tr class="print"><td class="print">28-12-2019 15:07</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a></td><td class="print">Status</td><td class="print">assigned =&gt; closed</td></tr><tr class="print"><td class="print">28-12-2019 15:07</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a></td><td class="print">Fixed in Version</td><td class="print">4.11.1 (published 2019-05) =&gt; 4.12.1 (published 2020-05)</td></tr></table>
<br />
<table class="width100" cellspacing="1">
<tr>
	<td class="form-title" colspan="2">
		Notes	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0014804)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				04-09-2017 09:25&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				- Jacob, can you provide a use case?<br />
- Is it sufficient to build hash tables/trees with objects in the Java style?			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0014845)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				24-10-2017 12:48&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				STF decision: To be shifted to 2018 maintenance.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015375)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				06-08-2019 12:54&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				STF discussion: this can be seen as a short hand notation for a record of record structure, with implicit coding/decoding. And intuitive syntax for element access.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015434)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				08-08-2019 14:20&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				STF discussion: Jacob makes a proposal. STF aggress that the feature is useful.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015439)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				09-08-2019 10:56&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				Added first draft including the following features:<br />
- map type definition<br />
- indexed assignment notation (for map values)<br />
- index operation for accessing elements<br />
- from operation for accessing the key set<br />
- to operation for accessing the value set<br />
- type compatibility<br />
<br />
Please review			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015440)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				13-08-2019 16:44&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				The described behavior does not sound to be consistent with the already existing parts of the standard.<br />
<br />
When the assignment notation is used on the right hand side, with a key that has no associated value, the index notation shall cause a semantic or runtime error Just like in the case of record of and set of types when the indexed element is undefined or uninitialized.<br />
<br />
To check if a key-value mapping is present in the map, the ispresent predefined function should be used.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015441)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				14-08-2019 09:47&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				I don't understand what you mean with 'When the assignment notation is used on the right hand side with a key that has no associated value'. If you use the assignment notation (i.e. { [key] := value }) on the right hand side, the assignment to the key associates it to a value (or -). I have kept that part the same as for record of values, so this is consistent.<br />
<br />
Maybe you are referring to the index notation (i.e. m[key]) on the right hand side?<br />
<br />
If you read carefully, for the index notation it is exactly as you describe in the proposal, using it on the right hand side in anything else than a null-comparison shall result in an error. So, the null-comparison is just a way of checking for presentness. <br />
<br />
It seemed strange to me that assigning null to a field should be possible and not checking via equality, so allowing comparison with null seemed kind of natural/intuitive. But I am also fine with disallowing even the null-check.<br />
<br />
So, if you want to always cause it an error, the isbound/ispresent/isvalue functions can all be used for checking if a key has an associated value (by basically checking that the expression doesn't cause an error).<br />
<br />
Are you okay with the null-assignment for removing a key-association or do we need to invent some other syntax for that?			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015442)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				14-08-2019 12:52&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				True, I ment index notation.<br />
Yes, I would find it better if we would disallow the null-check.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015447)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				23-08-2019 15:05&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				maybe the replace predefined function would be better for deleting/replacing existing mappings.<br />
For example:<br />
type map from charstring to charstring charToCharMap; // much like record of charstring;<br />
var chartoCharMap myMap:= {[&quot;1&quot;] := &quot;1&quot;, [&quot;2&quot;] := &quot;2&quot;, [&quot;3&quot;] := &quot;3&quot;, [&quot;4&quot;] := &quot;4&quot;};<br />
then use something like replace(myMap, &quot;1&quot;, 1, {} ) to delete the first mapping, replace (myMap, &quot;1&quot;, 2, {}) to replace/delete the first 2 mappings.<br />
<br />
This way we could work with multiple mappings at the same time.<br />
Maybe even the substring predefined function could be used like this.<br />
And it would be consistent with a maps are record of record understanding.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015448)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				26-08-2019 08:19&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				I don't think this is a good idea for several reasons:<br />
<br />
- replace doesn't work in place on variables, but produces a copy, so this is a costly operation if the tables are large<br />
- so far, there is no order to the keys imposed, so it would be unintuitive to assume one but you need it to specify something like the 'first two mappings'<br />
<br />
As an alternative, we could overload the unmap operation to unmap a key in a table:<br />
<br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;unmap(v_table, v_key)			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015449)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				26-08-2019 09:49&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				unmap might also be fine.<br />
<br />
please note, that the order in which the mappings are &quot;added&quot; to the table, intuitively create and ordering.<br />
Just like with database tables, the order you insert the rows is the order people will expect to read them.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015456)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				26-08-2019 11:25&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				STF discussion: overload the unmap operation also to delete keys from map variables.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015520)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				16-12-2019 12:24&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				Changed according to discussion. Unmap to be used to remove key-value associations. isbound etc to be used to check for association. referencing of undefined association on right hand side causes error.<br />
<br />
Also amended BNF accordingly.<br />
<br />
Please check.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015539)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=361">KristÃ³f Szabados</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				17-12-2019 09:00&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				Looks good to me, can be included in the standard.			</td>
		</tr>
		</table>
	</td>
</tr>
<tr>
	<td class="print-spacer" colspan="2">
		<hr size="1" />
	</td>
</tr>
<tr>
	<td class="nopad" valign="top" width="20%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				(0015588)
			</td>
		</tr>
		<tr>
			<td class="print">
				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a>&#160;&#160;&#160;
			</td>
		</tr>
		<tr>
			<td class="print">
				28-12-2019 15:07&#160;&#160;&#160;
							</td>
		</tr>
		</table>
	</td>
	<td class="nopad" valign="top" width="85%">
		<table class="hide" cellspacing="1">
		<tr>
			<td class="print">
				Included to final draft 4.11.2.			</td>
		</tr>
		</table>
	</td>
</tr>
</table>
</body>
</html>
