OMEdit: Handling multiple class definitions in one file

[Per Östlund]

OMEdit allows the user to open a file that contains multiple class definitions, e.g. a file that contains:

model A end A;
model B end B;

Opening such a file simply adds the classes to the top scope. However, if you open one of the classes and save it, then OMEdit overwrites the file and saves only that class. This means that the other classes in the file are lost.

The specification says this however (section 13.2.2.2):

A nonstructured entity [e.g. the file A.mo] shall contain only a stored-definition that defines a class [A] with a name matching the name of the nonstructured entity.

So defining multiple top-level classes in one file is not really allowed, even though both OM and Dymola allows it.

So we should either forbid it completely (but tell the user why), or make sure that OMEdit saves all models in the file.

[Adeel Asghar]

Yes, I have already reported this issue,
https://trac.openmodelica.org/OpenModelica/ticket/2122

This should be handled at compiler level instead of inside OMEdit. If its fixed in compiler then all client applications will be happy.