6.5.6 Upgrading extension classes from older version of GiNaC

If you got some extension classes for GiNaC 1.3.X some changes are necessary in order to make your code work with GiNaC 1.4.

• constructors which set tinfo_key such as

  myclass::myclass() : inherited(TINFO_myclass) {}

  need to be rewritten as

  myclass::myclass() : inherited(&myclass::tinfo_static) {}

• TINO_myclass is not necessary any more and can be removed.