[boost] [contract] static if instead of assertion requirements

Hello all, I was reading the proposal to add "static if" to C++1x and I will use such a syntax for assertion requirements: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3329.pdf Current syntax for assertion requirements: postcondition( back() == value, requires boost::has_equal<T>::value ) Will be replaced with static if: postcondition( static if(boost::has_equal<T>::value) ( back() == value ) // optional else ( ... ) ) If there were interested, I could even provide a separate BOOST_STATIC_IF(const_condition, then_code, else_code)... however, such a macro could only be used at namespace and class scope, not a function scope :( --Lorenzo