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<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">0007530</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">17-11-2016 16:30</td><td class="print">30-12-2017 15:41</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">no change required</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"></td><td class="print" colspan="4">&#160;</td></tr><tr><td class="print-category">Target Version</td><td class="print">v4.10.1 (published 2018-05)</td><td class="print-category">Fixed in Version</td><td class="print"></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">Appendix A.1.3</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">0007530: keywords should be escapable to be used as a TTCN-3 identifier.</td></tr><tr class="print"><td class="print-category">Description</td><td class="print" colspan="5">Nowadays, it is possible that an old module for a previous version of TTCN-3 is imported into a module with a newer language tag or that uses packages that the imported module does not use. <br />
<br />
This can lead to the situation that in the newer/more-package-heavy module some identifiers that are totally valid identifiers in the other module are keywords and thus, not valid identifiers anymore. <br />
<br />
The importing module would then not be able to reference the imported items.<br />
<br />
To solve this problem, an identifier escape mechanism should be introduced so that the importing module can use the escape-notation when using an identifier from the imported module that is a keyword in the importing one.<br />
<br />
A simple solution would be to allow the identifier to be put into single tick characters (same as octetstring etc):<br />
<br />
'value'<br />
.<br />
This syntax can be used everywhere that an identifier can be used, e.g.<br />
<br />
t.'value'<br />
<br />
On the lexer-level there is unfortunately a prefix-overlap with octetstring and hexstring literals that start with digits above 9 (i.e. A B C D E F), but since the new syntax would not end in 'O or 'H, this lexical issue can be resolved.</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"><table border="0" width="100%" cellpadding="0" cellspacing="1"><tr><td class="print"><span class="nowrap">related to</span>&#160;</td><td class="print">0007683</td><td class="print">closed&#160;</td><td class="print"><span class="nowrap"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy Rethy</a></span>&#160;</td><td class="print">Keywords (from packages) should be reserved in the Core Standard.&#160;</td></tr></table></td></tr><tr class="print"><td class="print-category">Attached Files</td><td class="print" colspan="5"></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">17-11-2016 16:30</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">17-11-2016 16:30</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">17-11-2016 16:30</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">24-12-2016 15:03</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a></td><td class="print">Project</td><td class="print">TTCN-3 Change Requests =&gt; Part 01: TTCN-3 Core Language</td></tr><tr class="print"><td class="print">24-12-2016 15:03</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=82">Jens Grabowski</a></td><td class="print">Target Version</td><td class="print"> =&gt; v4.10.1 (published 2018-05)</td></tr><tr class="print"><td class="print">17-04-2017 15:13</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=1021">szabados</a></td><td class="print">Note Added: 0014563</td><td class="print"></td></tr><tr class="print"><td class="print">17-04-2017 15:13</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=1021">szabados</a></td><td class="print">Note Deleted: 0014563</td><td class="print"></td></tr><tr class="print"><td class="print">18-04-2017 15:21</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=1021">szabados</a></td><td class="print">Note Added: 0014575</td><td class="print"></td></tr><tr class="print"><td class="print">18-04-2017 15:24</td><td class="print"><a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=1021">szabados</a></td><td class="print">Note Added: 0014576</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 11:53</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">Note Added: 0014579</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 11:54</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: 0014580</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 11:54</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: 0014581</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 11:54</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: 0014582</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 11:55</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: 0014583</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 11:56</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: 0014584</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 11:56</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: 0014585</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 14:39</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: 0014586</td><td class="print"></td></tr><tr class="print"><td class="print">19-04-2017 14:39</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 Deleted: 0014586</td><td class="print"></td></tr><tr class="print"><td class="print">09-06-2017 15:39</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">Relationship added</td><td class="print">related to 0007683</td></tr><tr class="print"><td class="print">26-07-2017 14:08</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: 0014783</td><td class="print"></td></tr><tr class="print"><td class="print">26-07-2017 14:08</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; resolved</td></tr><tr class="print"><td class="print">26-07-2017 14:08</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">Resolution</td><td class="print">open =&gt; no change required</td></tr><tr class="print"><td class="print">24-10-2017 13:57</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; Gyorgy Rethy</td></tr><tr class="print"><td class="print">24-10-2017 13:57</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">resolved =&gt; assigned</td></tr><tr class="print"><td class="print">24-10-2017 13:58</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">assigned =&gt; resolved</td></tr><tr class="print"><td class="print">30-12-2017 15:41</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; closed</td></tr></table>
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				(0014575)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=1021">szabados</a>&#160;&#160;&#160;
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				18-04-2017 15:21&#160;&#160;&#160;
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				What was the original issue here?<br />
It sound like we need some mapping rules between the language versions in question. Like private to _private.<br />
<br />
I believe introducing a new sort of identifiers or way of writing identifiers could be an overkill if the actual issue only needs a transformation.			</td>
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				(0014576)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=1021">szabados</a>&#160;&#160;&#160;
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				18-04-2017 15:24&#160;&#160;&#160;
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				Or it would be even better to ask users to upgrade their old modules.<br />
Mixing different language versions in the same project can be dangerous if users do not check the language identifier in each module before they change it.<br />
Also if users are not perfectly sure in the minute differences in each language version they are using.<br />
<br />
Would it be a good idea to include support for very old language version into the list of features that can be deprecated?<br />
What do you think, if the standard would only support old version only up to a specified time or version number difference - like usually done with software - would that be a good incentive for users to upgrade?			</td>
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				(0014579)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				19-04-2017 11:53&#160;&#160;&#160;
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				I think I made the case pretty clear			</td>
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				Module M1 that has package A with keyword X imports module M2 without package A e.g. just a normal XSD import. In the imported module, the identifier X will not be quoted as in that context, X is nothing special. But, in module M1 you cannot use X as identifier as it is a keyword.			</td>
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				(0014581)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				To still access the X, you need to quote it somehow. The proposed syntax for quoting X would be a normal quoting mechanism for identifiers that other languages allow. Prefixing with a dollar or a backslash could also work, but personally, I prefer the proposed option the most.			</td>
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				(0014582)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				19-04-2017 11:54&#160;&#160;&#160;
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				Otherwise, there would need to be a mechanism that you can import an external language module with additional package options so that the mapping can take those into account.			</td>
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				(0014583)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				19-04-2017 11:55&#160;&#160;&#160;
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				The same applies when you are using code you have no control over, like a library or a standardized test suite part that you are not allowed to change.			</td>
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				(0014584)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				19-04-2017 11:56&#160;&#160;&#160;
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				Simply asking the user to change the problematic code isn't always an option.			</td>
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				There is no actual real-life use-case for this, but the problem occurred to me at some point and I wanted to address it.			</td>
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				(0014783)
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				<a href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob Wieland - Spirent</a>&#160;&#160;&#160;
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				26-07-2017 14:08&#160;&#160;&#160;
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				With the solution that all keywords of packages shall also be reserved in the core document, this issue cannot happen anymore, so no change is required to address it.			</td>
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