I have been able to make the binary operator traits work with pointers. It has been a hard job but I think it is now working well (thank you Jeffrey for pointing to that particular issue). I still have to do the same for unary operators but this should be much easier. The current list of supported operators (35) is now: * 28 binary operators: . ==, !=, <, <=, >, >=, . +, -, *, /, %, +=, -=, *=, /=, %=, . &, |, ^, &=, |=, ^=, . <<, >>, <<=, >>=, . &&, ||, * 5 prefix unary operators: . ! . -, + . --, ++ * 2 postfix unary operators: . --, ++ Here are the links to the updated code and documentation: * http://www.boostpro.com/vault/index.php?action=downloadfile&filename=type_traits.tar.bz2&directory=Extension& * http://svn.boost.org/svn/boost/sandbox/type_traits/ Frédéric