33 void testTwoWayComparisons( const T& lhs, const T& rhs ) {  in testTwoWayComparisons()  argument
34     REQUIRE_MESSAGE(((lhs < rhs) == ExpectLess),  in testTwoWayComparisons()
36     REQUIRE_MESSAGE(((lhs <= rhs) == (ExpectLess || ExpectEqual)),  in testTwoWayComparisons()
39     REQUIRE_MESSAGE(((lhs > rhs) == ExpectGreater),  in testTwoWayComparisons()
41     REQUIRE_MESSAGE(((lhs >= rhs) == (ExpectGreater || ExpectEqual)),  in testTwoWayComparisons()
46 void testEqualityComparisons( const T& lhs, const T& rhs ) {  in testEqualityComparisons()  argument
47     REQUIRE_MESSAGE((lhs == rhs) == ExpectEqual,  in testEqualityComparisons()
49     REQUIRE_MESSAGE((lhs != rhs) == !ExpectEqual,  in testEqualityComparisons()
55 void testThreeWayComparisons( const T& lhs, const T& rhs ) {  in testThreeWayComparisons()  argument
56     auto three_way_result = lhs <=> rhs;  in testThreeWayComparisons()
59     REQUIRE_MESSAGE((lhs <=> rhs <= 0) == (ExpectLess || ExpectEqual),  in testThreeWayComparisons()
62     REQUIRE_MESSAGE((lhs <=> rhs > 0) == ExpectGreater,  in testThreeWayComparisons()
64     REQUIRE_MESSAGE((lhs <=> rhs >= 0) == (ExpectGreater || ExpectEqual),  in testThreeWayComparisons()
66     REQUIRE_MESSAGE((lhs <=> rhs == 0) == ExpectEqual,  in testThreeWayComparisons()
68     REQUIRE_MESSAGE((lhs <=> rhs != 0) == !ExpectEqual,  in testThreeWayComparisons()
75 void testEqualityAndLessComparisons( const T& lhs, const T& rhs ) {  in testEqualityAndLessComparisons()  argument
76     testEqualityComparisons<ExpectEqual>(lhs, rhs);  in testEqualityAndLessComparisons()
77     testTwoWayComparisons<ExpectEqual, ExpectLess>(lhs, rhs);  in testEqualityAndLessComparisons()
79     testThreeWayComparisons<ExpectEqual, ExpectLess>(lhs, rhs);  in testEqualityAndLessComparisons()
109     friend bool operator==( const TwoWayComparable& lhs, const TwoWayComparable& rhs ) {
111         return lhs.n == rhs.n;
114     friend bool operator!=( const TwoWayComparable& lhs, const TwoWayComparable& rhs ) {
116         return lhs.n != rhs.n;
119     friend bool operator<( const TwoWayComparable& lhs, const TwoWayComparable& rhs ) {
121         return lhs.n < rhs.n;
124     friend bool operator>( const TwoWayComparable& lhs, const TwoWayComparable& rhs ) {
126         return lhs.n > rhs.n;
129     friend bool operator<=( const TwoWayComparable& lhs, const TwoWayComparable& rhs ) {
131         return lhs.n <= rhs.n;
134     friend bool operator>=( const TwoWayComparable& lhs, const TwoWayComparable& rhs ) {
136         return lhs.n >= rhs.n;
194     friend auto operator<=>( const ThreeWayComparable& lhs, const ThreeWayComparable& rhs ) {
196         return lhs.n <=> rhs.n;
221 …  friend auto operator<=>( const ThreeWayComparableOnly& lhs, const ThreeWayComparableOnly& rhs ) {
222         return lhs.n <=> rhs.n;
224     friend bool operator==( const ThreeWayComparableOnly& lhs, const ThreeWayComparableOnly& rhs ) {
225         return lhs.n == rhs.n;
237     friend bool operator<( const LessComparableOnly& lhs, const LessComparableOnly& rhs ) {
238         return lhs.n < rhs.n;
240     friend bool operator==( const LessComparableOnly& lhs, const LessComparableOnly& rhs ) {
241         return lhs.n == rhs.n;