FMassDeferredCommand | Unreal Engine 5.8 Documentation

API > API/Runtime > API/Runtime/MassEntity

Stores a lambda to execute at flush time. Maximum flexibility, no type safety. The OpType template parameter controls execution ordering relative to other commands. Multiple lambdas of the same OpType batch into a single command instance.

When to use: as a last resort when no typed command fits the use case, or for complex multi-step operations that can't be expressed as a single composition change. Prefer typed commands (AddElements, RemoveElements, etc.) when possible.

Example: Context.Defer().PushCommand(Entity { FMassEntityView View(Manager, Entity); View.GetFragmentData().Value = 42; });

Variants (by execution order): FMassDeferredCreateCommand, FMassDeferredAddCommand, FMassDeferredRemoveCommand, FMassDeferredChangeCompositionCommand, FMassDeferredSetCommand, FMassDeferredDestroyCommand.

Breakpoint support: No. No type safety. No validation.


Name	FMassDeferredCommand
Type	struct
Header File	/Engine/Source/Runtime/MassEntity/Public/MassCommands.h
Include Path	#include "MassCommands.h"

Syntax

template<EMassCommandOperationType OpType>  
struct FMassDeferredCommand : public FMassBatchedCommand

Inheritance Hierarchy

FMassBatchedCommand → FMassDeferredCommand

Constructors

Name	Remarks	Include Path	Unreal Specifiers
FMassDeferredCommand()		MassCommands.h

Typedefs

Name	Type	Remarks	Include Path
FExecFunction	TFunction< void(FMassEntityManager &EntityManager)>		MassCommands.h
Super	FMassBatchedCommand		MassCommands.h

Functions

Public

Name	Remarks	Include Path	Unreal Specifiers
void Add ( FExecFunction&& ExecFunction )		MassCommands.h
void Add ( const FExecFunction& ExecFunction )		MassCommands.h

Protected Virtual

Overridden from FMassBatchedCommand

Name	Remarks	Include Path	Unreal Specifiers
virtual SIZE_T GetAllocatedSize()		MassCommands.h
virtual void Reset()		MassCommands.h
virtual void Run ( FMassEntityManager& EntityManager )		MassCommands.h

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