I'm seeing, what appears to me anyhow, rather strange behaviour with is_const and remove_const etc when used with arrays. With VC71 and a recent cvs I see... is_same::type,int[1]>::value; // true is_const::value; // false ?? is_same::type,int[1][1]>::value; // false ?? is_same::type,const int[1][1]>::value; // true is_const::value; // false ?? is_volatile::value; // false ?? is_same::type,int[1][1]>::value; // false ?? is_same::type,volatile int[1][1]>::value; // true Using Comeau 4.3.3; is_same::type,int[1]>::value; // true is_const::value; // true is_same::type,int[1][1]>::value; // false ?? is_same::type,const int[1][1]>::value; // true is_const::value; // true is_volatile::value; // true is_same::type,int[1][1]>::value; // false ?? is_same::type,volatile int[1][1]>::value; // true Regards, Richard.