GiNaC/ginac ex.cpp ex.h operators.cpp operators.h

[Richard Kreckel]

Update of /home/cvs/GiNaC/ginac

Modified Files:
	ex.cpp ex.h operators.cpp operators.h 
Log Message:
* All operators are now strictly following the semantics we all know from
  C/C++.  I.e. e1+e2=42; is now impossible and other such stuff.  For all
  remaining errors (i.e. ++e1 = e1+1;) the compiler alone is to blame...