170a620d29
- Add definitions for >, <=, >= to round out the relational algebra. - Change relational ops to in-class friend definitions, which means they won't be visible or interfere with the overload set on every relational op associated with namespace 'mongo::'. - Have them all reuse a new 'tieRelational' member, so the std::tie is in one place, they are correct by inspection, and they can be generated without template interpolation.