------- Comment #13 from pinskia at gcc dot gnu dot org 2010-08-12 16:09 ------- >diferent types?
He did not say different types but different objects. There is a difference between objects and types. This comes down to: &a - &b being undefined in C90/C99/C++98/C++03/C++0x because a and b are two different objects. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45265