[Boost-users] null_ptr?

Hi, Does boost have some sort of null_ptr class that allows you to do portable NULL comparisons? For example, the following isn't portable: char* foo = 0; if( foo != 0 ) { } But this is portable: char* foo = reinterpret_cast( 0 ); if( foo != reinterpret_cast( 0 ) ) { } You could easily create a null_ptr class with a few global template operators to make this easy, so you could do this: char* foo = boost::null_ptr; if( foo != boost::null_ptr ) { } Is there such a thing? Thanks.