Internal inconsistency for ExternalObject

[modelica-trac-importer]

Reported by hansolsson on 26 Jul 2013 07:57 UTC
The ExternalObject is using restricted class 'class' (and similarly external tables in MSL) and is designed to have code such as:

Section 12.9.7.

Contains:

class MyTable
 extends ExternalObject;
 function constructor
  input String fileName := ""; 
  input String tableName := "";
  output MyTable table;
  external "C" table = initMyTable(fileName, tableName);
 end constructor;
 function destructor "Release storage of table"
  input MyTable table;
  external "C" closeMyTable(table);
 end destructor;
end MyTable;

Note: "input/output MyTable table", but:

4.4.2.2 States:
Type prefixes (that is, flow, stream, discrete, parameter, constant, input, output) shall only be applied for type, record and connector components – see also record specialized class, Section 4.6.
--
Conclusion: it seems that input/output should be allowed for components of class as well.

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Migrated-From: https://trac.modelica.org/Modelica/ticket/1221

[modelica-trac-importer]

Comment by hansolsson on 4 Sep 2013 11:21 UTC
There are also user-libraries that rely on parameter-ExternalObject; that also needs to be considered.

[modelica-trac-importer]

Comment by jmattsson on 4 Sep 2013 11:25 UTC
Perhaps it should only be allowed in functions? And for that matter, not for all classes declared as class either.

[modelica-trac-importer]

Comment by hansolsson on 24 Sep 2013 07:44 UTC
Language group:
Var 1:
"Type prefixes (that is, flow, stream, discrete, parameter, constant, input, output) shall only be applied for type, record, and connector components, as well as components of classes extending from ExternalObject – see also record specialized class, Section 4.6; and ExternalObject Section ..."

Var 2:
"Type prefixes (that is, flow, stream, discrete, parameter, constant, input, output) shall only be applied for type, record, and connector components - see also record specialized class, Section 4.6. In addition components of classes extending from ExternalObject may in addition have type prefixes parameter and constant, and in functions also type prefixes input and output - see Section ..."
Decided on var 2.

[modelica-trac-importer]

Comment by hansolsson on 23 Oct 2013 11:09 UTC
Resolved in r7098