[Boost-users] enable_if for class members

In a class, I want to have one member function which has different implementations depending on one of the template parameters. I tried to use enable_if template<bool b> struct foo { typename boost::enable_if_c::type get_val( ) { return 2; } typename boost::disable_if_c::type get_val() { return 3; } }; But when I use foo in code, it doesn't work, complaning that: error: no type named 'type' in 'struct boost::enable_if_c' Am I not using enable_if in the correct way? Is there any easy way to do waht I'm trying to do? I used to do this by declaring an inner class and overloading that, but then it is necessary to pass in the class and the code looks very messy. Thanks, Chris