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<td colspan="6" class="form-title"><div class="center">
ETSI's Bug Tracker - Part 01: TTCN-3 Core Language
</div></td>
</tr>
<tr class="even">
<td colspan="6" class="form-title">View Issue Details</td>
</tr>
<tr class="odd">
<td colspan="6" class="print-spacer"><hr /></td>
</tr>
<tr class="even 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="odd print">
<td class="print">0007807</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">11-10-2018 08:58</td>
<td class="print">06-01-2019 08:50</td>
</tr>
<tr class="even">
<td colspan="6" class="print-spacer"><hr /></td>
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<tr class="odd print">
<td class="print-category">Reporter</td>
<td class="print">Jacob Wieland - Spirent</td>
<td colspan="4" class="print"> </td>
</tr>
<tr class="even print">
<td class="print-category">Assigned To</td>
<td class="print">Gyorgy Rethy</td>
<td colspan="4" class="print"> </td>
</tr>
<tr class="odd 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="even print">
<td class="print-category">Status</td>
<td class="print">closed</td>
<td class="print-category">Resolution</td>
<td class="print">fixed</td>
<td colspan="2" class="print"> </td>
</tr>
<tr class="odd 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="even print">
<td class="print-category">Product Version</td>
<td class="print"></td>
<td colspan="4" class="print"> </td>
</tr>
<tr class="odd">
<td class="print-category">Target Version</td>
<td class="print"></td>
<td class="print-category">Fixed in Version</td>
<td class="print">4.11.1 (published 2019-05)</td>
<td colspan="2" class="print"> </td>
</tr>
<tr class="even print">
<td class="print-category">Clause Reference(s)</td>
<td colspan="4" class="print">15.4</td>
<td></td>
</tr>
<tr class="odd print">
<td class="print-category">Source (company - Author)</td>
<td colspan="4" class="print">Spirent - Jacob Wieland</td>
<td></td>
</tr>
<tr class="even">
<td colspan="6" class="print-spacer"><hr /></td>
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<tr class="odd print">
<td class="print-category">Summary</td>
<td colspan="5" class="print">0007807: Generalizing the modifies
operation</td>
</tr>
<tr class="even print">
<td class="print-category">Description</td>
<td colspan="5" class="print">At the moment, it is very restricted where
you can use modifies, even though it is a powerful and useful
construct.<br />
<br />
It would be useful if the result of a modification could be directly
used inside of a template expression (TemplateBody).<br />
<br />
Also, at the moment, it is unclear what it means if a partially
initialized variable (template or not) appears in the modification
operand of the modifies construct. From the text it appears that it
would possibly just overwrite the corresponding part in the parent
template, but that would lead to assignments of uninitialized parts
(circumventing the rule that you cannot un-initialize something already
initialized).<br />
<br />
Instead, uninitialized fields in the modification part should be treated
as 'unchanged' for the purpose of the modification algorithm.<br />
<br />
This has the property that it doesn't matter whether I first assign the
modification to a variable and then use the variable or write the same
syntax in the modification directly:<br />
<br />
var MyRecord x := { f1 := 1, f2 := - } // f2 remains uninitialized<br />
template MyRecord t modifies t2 := x; // f2 remains unchanged<br />
<br />
would be the same as<br />
<br />
template MyRecord t modifies t2 := { f1 := 1, f2 := - }<br />
<br />
This has the advantage that modifications can be stored in variables,
passed around as parameters and be reused and even modified
themselves.<br />
<br />
Syntactically, because the current 'inline' version of modifies has the
confusing assignment symbol, we should instead introduce a new mixfix
operator:<br />
<br />
modifies &lt;ParentTemplate&gt; { with &lt;ModificationTemplate&gt;
}+<br />
<br />
The grammar should be amended in the following way:<br />
<br />
Rename the rule of TemplateBody to BaseTemplateBody<br />
<br />
Introduce new rules:<br />
<br />
TemplateBody ::= BaseTemplateBody | DerivedTemplateBody<br />
DerivedTemplateBody ::= ModifiesKeyword BaseTemplateBody {WithKeyword
BaseTemplateBody}+</td>
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<tr class="odd print">
<td class="print-category">Steps To Reproduce</td>
<td colspan="5" class="print"></td>
</tr>
<tr class="even print">
<td class="print-category">Additional Information</td>
<td colspan="5" class="print"></td>
</tr>
<tr class="odd print">
<td class="print-category">Tags</td>
<td colspan="5" class="print">No tags attached.</td>
</tr>
<tr class="even print">
<td class="print-category">Relationships</td>
<td colspan="5" class="print"></td>
</tr>
<tr class="odd print">
<td class="print-category">Attached Files</td>
<td colspan="5" class="print"><img
src="http://oldforge.etsi.org/mantis/images/fileicons/doc.gif"
alt="docx" /> CR7807.docx (181,870) <span class="italic">12-10-2018
10:01</span><br />
http://oldforge.etsi.org/mantis/file_download.php?file_id=3810&amp;type=bug</td>
</tr>
<tr class="even">
<td colspan="6" class="print-spacer"><hr /></td>
</tr>
<tr class="odd">
<td class="form-title">Issue History</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even 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>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">11-10-2018 08:58</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>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">11-10-2018 11:58</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>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">11-10-2018 11:58</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>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">12-10-2018 10:01</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: CR7807.docx</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">12-10-2018 10:03</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: 0015269</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">12-10-2018 10:04</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>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">12-10-2018 10:04</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>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">12-10-2018 10:57</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Note Added: 0015270</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">12-10-2018 10:57</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Status</td>
<td class="print">confirmed =&gt; resolved</td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">12-10-2018 10:57</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Resolution</td>
<td class="print">open =&gt; fixed</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">12-10-2018 10:57</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a></td>
<td class="print">Assigned To</td>
<td class="print">Tomas Urban =&gt; Gyorgy Rethy</td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">06-01-2019 08:22</td>
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy
Rethy</a></td>
<td class="print">Project</td>
<td class="print">TTCN-3 Change Requests =&gt; Part 01: TTCN-3 Core
Language</td>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">06-01-2019 08:50</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: 0015325</td>
<td class="print"></td>
<td></td>
<td></td>
</tr>
<tr class="even print">
<td class="print">06-01-2019 08:50</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>
<td></td>
<td></td>
</tr>
<tr class="odd print">
<td class="print">06-01-2019 08:50</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">=&gt; 4.11.1 (published 2019-05)</td>
<td></td>
<td></td>
</tr>
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<td class="nopad" data-valign="top" width="20%"><table class="hide"
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<tbody>
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<td class="print">(0015269)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=508">Jacob
Wieland - Spirent</a>   </td>
</tr>
<tr class="odd">
<td class="print">12-10-2018 10:03   </td>
</tr>
</tbody>
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<td class="nopad" data-valign="top" width="85%"><table class="hide"
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<td class="print">As the 'with' clashes with the with-part (at least if
repeated) and the := syntax and the with syntax are so similar in
placement, I just generalized the modified template to a TemplateBody
and distinguish between TemplateBody, DerivedTemplateBody (the inline
modifies construct) and BaseTemplateBody (all other template body
constructions) where the left and right hand side of DerivedTemplateBody
can only be BaseTemplateBody (to avoid weird stacking of modifies
without giving parantheses).<br />
<br />
Please check.</td>
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</tbody>
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<tr class="even">
<td colspan="2" class="print-spacer"><hr /></td>
</tr>
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<td class="nopad" data-valign="top" width="20%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">(0015270)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=659">Tomas
Urban</a>   </td>
</tr>
<tr class="odd">
<td class="print">12-10-2018 10:57   </td>
</tr>
</tbody>
</table></td>
<td class="nopad" data-valign="top" width="85%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">Reviewed. No issues found. Can be added to the next
version of the core language specification.</td>
</tr>
</tbody>
</table></td>
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<tr class="even">
<td colspan="2" class="print-spacer"><hr /></td>
</tr>
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<td class="nopad" data-valign="top" width="20%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">(0015325)</td>
</tr>
<tr class="even">
<td class="print"><a
href="http://oldforge.etsi.org/mantis/view_user_page.php?id=127">Gyorgy
Rethy</a>   </td>
</tr>
<tr class="odd">
<td class="print">06-01-2019 08:50   </td>
</tr>
</tbody>
</table></td>
<td class="nopad" data-valign="top" width="85%"><table class="hide"
data-cellspacing="1">
<tbody>
<tr class="odd">
<td class="print">Added to draft v4.10.2</td>
</tr>
</tbody>
</table></td>
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