A while back there were some changes to the pattern language library
that changed the way shared_pointers are created using
shared_from_this(). Unfortunatelly the changes were not complete and
various bugs were created among them 2234, json type not working, unable
to export files, static arrays of bitfields,... The cause of the errors
was that in class Pattern the member m_parent was left as a raw pointer
and it needs to be handled by shared pointers. Also there were some
cases in which share pointers were needed but unique pointers were used
instead. Both cause crashes when shared_from_this is used on pointers
that are not managed by shared_ptr. Another source of errors were
infinite loops of clone and reference that caused stack overflow. The
fixes include making m_parent a weak pointer, turning unique pointers
into shared pointers and moving codefrom the copy constructors into
clone to break the infinite loops.These changes are the bare minimum
needed to bring the pattern language back to the full functionality that
it had before shared_from_this was introduced or at least thats the
hope.
The horizontal scroll bar length is set using the maximum line length across the input file. The original setup had the lengths of imported and included files added so changes are made to insure that only changes from the input file are taken. This required changes to the Pattern Language library so the library is updated to the latest version as well.
