58 struct StatePair {  struct
64     StatePair() = default;  argument
66     StatePair(First f, Second s)  in StatePair()  function
77     inline bool operator==(const StatePair other) const noexcept {  in operator ==()  argument
81     inline bool operator<(const StatePair other) const noexcept {  in operator <()  argument
95 struct StatePair<First, VoidState> {  struct
100     inline StatePair() noexcept = default;  argument
102     inline StatePair(First f, VoidState ROBIN_HOOD_UNUSED(x) /*unused*/) noexcept  in StatePair()  argument
112     inline bool operator==(const StatePair other) const noexcept {  in operator ==()  argument
116     inline bool operator<(const StatePair other) const noexcept {  in operator <()  argument
126 struct StatePair<VoidState, Second> {  struct
131     explicit inline StatePair(VoidState ROBIN_HOOD_UNUSED(x) /*unused*/, Second s) noexcept  in StatePair()  argument
134     inline StatePair() noexcept = default;
143     inline bool operator==(const StatePair other) const noexcept {  in operator ==()  argument
147     inline bool operator<(const StatePair other) const noexcept {  in operator <()  argument
158 class hash<StatePair<First, Second>> {  argument
160     size_t operator()(const StatePair<First, Second>& s) const noexcept {  in operator ()()
196 using InternalStateId = StatePair<FstStatePair, FState>;
198 using FState = StatePair<IntegralState<int>, StatePair<IntegralState<int>, VoidState>>;