Server Levent Yilmaz wrote:
// A function object generator. // It returns a functor which in turn returns some // double member of A accessed via address offset boost::function<double(const A&)> getmem ( const A* obj, const double* mem ) { ptrdiff_t shift = mem - reinterpret_cast<const double*>(obj); using namespace boost::lambda; return *(ll_reinterpret_cast<const double*>(&_1) + constant(shift) ); }
This definitely sounds like a compiler bug. But your code isn't quite standard-conforming. You ought to use a pointer to member, not reinterpret_cast tricks. boost::function<double(const A&)> getmem( double A::* pm ) { return pm; }
int main() { A obj; obj.a = 1.; obj.b = 2.; // foo( getmem(&obj, &obj.b), obj );
foo( getmem( &A::b ), obj );
}