if_.h

#pragma once
 
namespace cgv {
    namespace type {
        namespace ctrl {
            template <bool condition_type, typename then_type, typename else_type> 
            struct if_ {
                typedef then_type type;
            };
            template <typename then_type, typename else_type> 
            struct if_<false,then_type,else_type> {
                typedef else_type type;
            };
        }
    }
}