Whats the difference between the following two rules?
This first implementation is working as expected:
Lane:
'{' actions+=Element* '}';
So I can leave it empty or add any number of Elements.
Whereas the second one throws an exception:
Lane:
'{' (actions+=Element+)? '}';
Stack trace:
Caused by: java.io.IOException: Generated EMF Model incomplete: Could not serialize EObject via backtracking.
Constraint: null actions+=Element null
Values: actions(2)
Semantic Object: ....->Lane
Context: Lane
Where has the multiplicity of Element in Constraint gone?
Constraint: null actions+=Element null