Classes
class	AddComponentCmd
	Command to add a component to an entity. More...

class	AddComponentsCmd
	Command to add multiple components to an entity. More...

class	Archetype
	Represents a unique combination of component types. More...

struct	ArchetypeEdgeKey
	Key for archetype edge transitions. More...

struct	ArchetypeEdgeKeyHash
	Hash function for ArchetypeEdgeKey. More...

class	Archetypes
	Manages archetypes and entity-archetype relationships. More...

class	ClearAllEventsCmd
	Command to clear all event queues without removing registration. More...

class	ClearComponentsCmd
	Command to clear all components from an entity. More...

class	ClearEventsCmd
	Command to clear all events of a specific type from the queue. More...

class	CmdBuffer
	Command buffer to record operations to be executed later. More...

class	CmdQueue
	Command queue for deferred ECS operations. More...

class	Components
	Manager for all component storages in the ECS world. More...

class	ComponentStorage
	Type-specific component storage using sparse set. More...

class	ComponentStorageBase
	Base class for type-erased component storage. More...

struct	ComponentTypeExtractor
	Type trait to extract the underlying component type from const/reference wrappers. More...

class	DestroyEntitiesCmd
	Command to destroy multiple entities. More...

class	DestroyEntityCmd
	Command to destroy a single entity. More...

class	Entities
	Entity manager responsible for entity creation, destruction, and validation. More...

class	EventManager
	Manages event lifecycle with double buffering and registration tracking. More...

struct	EventMetadata
	Metadata for registered events. More...

class	EventQueue
	Queue for managing multiple event types. More...

class	EventStorage
	Type-erased storage for events using a byte vector. More...

class	FunctionCmd
	Command that executes a function with World reference. More...

class	InsertResourceCmd
	Command to insert a resource into the world. More...

class	QueryCacheManager
	Manages query state caching with Bevy-inspired optimizations. More...

struct	QueryCacheStats
	Statistics for query cache performance. More...

class	QueryIterator
	Iterator for query results without entity information. More...

struct	QueryState
	Query state that caches archetype matching results. More...

class	QueryWithEntityIterator
	Iterator for query results with entity information. More...

class	RemoveComponentCmd
	Command to remove a component from an entity. More...

class	RemoveComponentsCmd
	Command to remove multiple components from an entity. More...

class	RemoveResourceCmd
	Command to remove a resource from the world. More...

class	Resources
	Resource container for World. More...

class	ResourceStorage
	Type-specific resource storage. More...

class	ResourceStorageBase
	Base class for type-erased resource storage. More...

class	SystemLocalStorage
	Local storage for system-specific data (commands, events, and temporary allocations). More...

class	TryAddComponentCmd
	Command to try add a component (only if missing). More...

class	TryAddComponentsCmd
	Command to try add multiple components (only missing ones). More...

class	TryDestroyEntitiesCmd
	Command to try destroy multiple entities. More...

class	TryDestroyEntityCmd
	Command to try destroy a single entity. More...

class	TryInsertResourceCmd
	Command to try insert a resource (only if missing). More...

class	TryRemoveComponentCmd
	Command to try remove a single component (only if present). More...

class	TryRemoveComponentsCmd
	Command to try remove multiple components (only those present). More...

class	TryRemoveResourceCmd
	Command to try remove a resource (only if present). More...

Concepts
concept	ValidWorldComponentAccess
	Concept for valid World/Component access combinations.

concept	AllocatorFor
	Concept for STL-compatible allocators.

Typedefs
template<typename T >
using	ComponentTypeExtractor_t = typename ComponentTypeExtractor< T >::type

template<typename T >
using	ComponentAccessType = std::conditional_t< std::is_reference_v< T >, T, std::conditional_t< std::is_const_v< T >, const ComponentTypeExtractor_t< T > &, ComponentTypeExtractor_t< T > & > >
	Helper to determine the proper return type for component access.

Variables
constexpr size_t	kDefaultFrameAllocatorCapacity = 64UZ * 1024UZ
	Default initial capacity for the per-system frame allocator (64KB).

template<typename T >
constexpr bool	IsConstComponent = std::is_const_v<std::remove_reference_t<T>>
	Helper to check if a type represents a const-qualified component access.

template<typename... Components>
constexpr bool	AllComponentsConst = (IsConstComponent<Components> && ...)
	Helper to check if all component types are const-qualified.

template<typename T >
constexpr bool	IsConstWorld = WorldType<T> && std::is_const_v<std::remove_reference_t<T>>
	Helper to detect if World type is const.

Typedef Documentation

◆ ComponentAccessType

template<typename T >

using helios::ecs::details::ComponentAccessType = typedef std::conditional_t<std::is_reference_v<T>, T, std::conditional_t<std::is_const_v<T>, const ComponentTypeExtractor_t<T>&, ComponentTypeExtractor_t<T>& > >

Helper to determine the proper return type for component access.

Returns appropriate reference type based on const qualification:

const T& for const-qualified access
T& for mutable access
T for value types (copy)
Template Parameters

T Requested component access type

Examples: /home/runner/work/HeliosEngine/HeliosEngine/src/core/include/helios/core/ecs/query.hpp.

Definition at line 98 of file query.hpp.

◆ ComponentTypeExtractor_t

template<typename T >

using helios::ecs::details::ComponentTypeExtractor_t = typedef typename ComponentTypeExtractor<T>::type

Examples: /home/runner/work/HeliosEngine/HeliosEngine/src/core/include/helios/core/ecs/query.hpp.

Definition at line 50 of file query.hpp.

Variable Documentation

◆ AllComponentsConst

template<typename... Components>

constexpr bool helios::ecs::details::AllComponentsConst = (IsConstComponent<Components> && ...)

constexpr

Helper to check if all component types are const-qualified.

Used to determine if an iterator can work with const Components.

Template Parameters

Components Component types to check

Examples: /home/runner/work/HeliosEngine/HeliosEngine/src/core/include/helios/core/ecs/query.hpp.

Definition at line 66 of file query.hpp.

◆ IsConstComponent

template<typename T >

constexpr bool helios::ecs::details::IsConstComponent = std::is_const_v<std::remove_reference_t<T>>

constexpr

Helper to check if a type represents a const-qualified component access.

Determines if the requested access is const-qualified for read-only operations.

Template Parameters

T	Type to check for const qualification

Examples: /home/runner/work/HeliosEngine/HeliosEngine/src/core/include/helios/core/ecs/query.hpp.

Definition at line 58 of file query.hpp.

◆ IsConstWorld

template<typename T >

constexpr bool helios::ecs::details::IsConstWorld = WorldType<T> && std::is_const_v<std::remove_reference_t<T>>

constexpr

Helper to detect if World type is const.

Used for compile-time validation of const World access.

Template Parameters

T	World type

Examples: /home/runner/work/HeliosEngine/HeliosEngine/src/core/include/helios/core/ecs/query.hpp.

Definition at line 74 of file query.hpp.

◆ kDefaultFrameAllocatorCapacity

constexpr size_t helios::ecs::details::kDefaultFrameAllocatorCapacity = 64UZ * 1024UZ

inlineconstexpr

Default initial capacity for the per-system frame allocator (64KB).

Definition at line 27 of file system_local_storage.hpp.

	Helios Engine 0.1.0 A modular ECS based data-oriented C++23 game engine

Classes

Concepts

Typedefs

Variables

Typedef Documentation

◆ ComponentAccessType

◆ ComponentTypeExtractor_t

Variable Documentation

◆ AllComponentsConst

◆ IsConstComponent

◆ IsConstWorld

◆ kDefaultFrameAllocatorCapacity