StateToIdMapPair.ixx File

Combined policy mapping two state types to IDs. More...

Included Headers

#include <vector> #include <span> #include <helios-engine-config.h> #include <cassert> #include <bit> #include <algorithm> #include <iterator> #include <helios.engine.core.types> #include <helios.engine.state.types> #include <helios.engine.state.StateToIdMap>

Namespaces Index

namespace	helios
namespace	engine
namespace	state

Classes Index

class	StateToIdMapPair<LState, RState, TId>
	Combines two StateToIdMap instances for dual-state lookups. More...

Description

Combined policy mapping two state types to IDs.

File Listing

The file content with the documentation metadata removed is:

1

5module;

6

7#include <vector>

8#include <span>

9#include <helios-engine-config.h>

10#include <cassert>

11#include <bit>

12#include <algorithm>

13#include <iterator>

14

15export module helios.engine.state.StateToIdMapPair;

16

17import helios.engine.state.StateToIdMap;

18

19import helios.engine.state.types;

20

21import helios.engine.core.types;

22

23using namespace helios::engine::state::types;

24

25export namespace helios::engine::state {

26

38 template<typename LState, typename RState, typename TId>

39 class StateToIdMapPair {

40

44 StateToIdMap<LState, TId> lft_;

45

49 StateToIdMap<RState, TId> rgt_;

50

54 mutable std::vector<TId> combined_;

55

63 void mergeInto(std::vector<TId>& out, std::span<const TId> lft, std::span<const TId> rgt) const {

64

65 out.clear();

66

67 out.reserve(lft.size() + rgt.size());

68

69 std::set_union(lft.begin(), lft.end(), rgt.begin(), rgt.end(), std::back_inserter(out));

70 }

71

72 public:

73

82 StateToIdMapPair& add(LState state, TId id) {

83 lft_.add(state, id);

84 return *this;

85 }

86

95 StateToIdMapPair& add(RState state, TId id) {

96 rgt_.add(state, id);

97 return *this;

98 }

99

111 [[nodiscard]] std::span<const TId> ids(const LState stateLft, const RState stateRgt) const {

112

113 assert(lft_.isFrozen() && rgt_.isFrozen() && "Cannot merge if sources are not frozen.");

114

115 if (!lft_.isFrozen() || !rgt_.isFrozen()) {

116 return {};

117 }

118

119 mergeInto(combined_, lft_.ids(stateLft), rgt_.ids(stateRgt));

120

121 return combined_;

122 }

123

127 void freeze() {

128 lft_.freeze();

129 rgt_.freeze();

130 }

131

132 };

133

134

135}

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