More reasons why C++ gives me headaches

This gem is from the wikibook More C++ Idioms, to get the address without needing a valid operator&. Enjoy the cast once, cast twice, wait, I didn't mean char at all goodness.

template 
T * addressof(T & v)
{
  return reinterpret_cast(& const_cast(reinterpret_cast(v)));
}