[boost] [optional] reduce need for operator ==

Hi! currently boost::optional<Type> requires an operator == for Type. If I only want to check if the optional is present or not, then this is not necessary. e.g. struct Foo {int i;}; boost::optional<Foo> foo; if (foo == boost::none) ... is it possible to change this? for example by template<class T> inline bool operator == ( optional<T> const& x, none_t ) { return !x; } -Jochen