1323     class Evaluator{};  class
1326     struct Evaluator<T1, T2, IsEqualTo> {  struct
1327         static bool evaluate( T1 const& lhs, T2 const& rhs) {  in evaluate()
1332     struct Evaluator<T1, T2, IsNotEqualTo> {  struct
1333         static bool evaluate( T1 const& lhs, T2 const& rhs ) {  in evaluate()
1338     struct Evaluator<T1, T2, IsLessThan> {  struct
1339         static bool evaluate( T1 const& lhs, T2 const& rhs ) {  in evaluate()
1344     struct Evaluator<T1, T2, IsGreaterThan> {  struct
1345         static bool evaluate( T1 const& lhs, T2 const& rhs ) {  in evaluate()
1350     struct Evaluator<T1, T2, IsGreaterThanOrEqualTo> {  struct
1351         static bool evaluate( T1 const& lhs, T2 const& rhs ) {  in evaluate()
1356     struct Evaluator<T1, T2, IsLessThanOrEqualTo> {  struct
1357         static bool evaluate( T1 const& lhs, T2 const& rhs ) {  in evaluate()