Use ada flag -gnat2012
Make samrt_ref object limited
Add smart alias
Add functions Image with specific separator
Use Image with separator
Smart_Alias must store accesses
Add output flows
Fix trace
Handle must be a reference to a box
Keep normal finalization
Indent
Align output to t_smart_ref
Test Smart_Alias
Smart_Alias must notify with counter
Use relase counter => double free!
Fix double free