FMessageStack | Unreal Engine 5.7 Documentation

Stack of tags & events used to track context during graph execution.


Name	FMessageStack
Type	struct
Header File	/Engine/Source/Runtime/Engine/Public/Animation/AnimNodeMessages.h
Include Path	#include "Animation/AnimNodeMessages.h"

Syntax

struct FMessageStack

Name	Remarks	Include Path
FMessageStack ( FMessageStack&& InMessageStack )		Animation/AnimNodeMessages.h
FMessageStack ( FMessageStack& )	Non-copyable.	Animation/AnimNodeMessages.h
FMessageStack ()		Animation/AnimNodeMessages.h

Name	Remarks
FMessageEntry	Holds a message that has been pushed onto the stack.
FNodeInfo	Info about a node.

Name	Remarks
EEnumerate	Return value for the various ForEach* enumeration functions.

Name	Type	Include Path
FMessageMap	TMap< FName, FMessageStackEntry, TInlineSetAllocator< 8 > >	Animation/AnimNodeMessages.h
FMessageStackEntry	TArray< FMessageEntry, TInlineAllocator< 8 > >	Animation/AnimNodeMessages.h
FTagMap	TMap< FName, FTagStackEntry, TInlineSetAllocator< 4 > >	Animation/AnimNodeMessages.h
FTagStackEntry	TArray< FNodeInfo, TInlineAllocator< 4 > >	Animation/AnimNodeMessages.h

Name	Type	Remarks	Include Path	Unreal Specifiers
MessageStacks	FMessageMap	Message stack.	Animation/AnimNodeMessages.h
TagStacks	FTagMap	Tag stack.	Animation/AnimNodeMessages.h

Name	Remarks	Include Path
void CopyForCachedUpdate ( const FMessageStack& InStack )	Copies the relevant parts of each stack only, ready for cached update.	Animation/AnimNodeMessages.h
void ForEachMessage ( TFunctionRef< EEnumerate(TGraphMessageType&)> InFunction ) const	Call the supplied function with each node subscribed to the specified message in this stack	Animation/AnimNodeMessages.h
void ForEachTag ( FName InTagId, TFunctionRef< EEnumerate(FNodeInfo)> InFunction ) const	Call the supplied function with each node tagged with the specified tag	Animation/AnimNodeMessages.h
bool HasMessage ()		Animation/AnimNodeMessages.h
void MakeEventContextData ( TArray< TUniquePtr< const IAnimNotifyEventContextDataInterface > >& ContextData ) const	Call MakeEventContextData for the top entry of each MessageType, returning interfaces for types that return event data	Animation/AnimNodeMessages.h
void TopMessage ( TFunctionRef< void(TGraphMessageType&)> InFunction ) const	Call the supplied function on the top-most node subscribed to the specified message in this stack	Animation/AnimNodeMessages.h
void TopMessageWeakPtr ( TFunctionRef< void(TWeakPtr< TGraphMessageType >&)> InFunction )	Call the supplied function on the top-most node subscribed to the specified message in this stack	Animation/AnimNodeMessages.h

Name	Remarks	Include Path	Unreal Specifiers
FMessageStack & operator= ( const FMessageStack& )		Animation/AnimNodeMessages.h
FMessageStack & operator= ( FMessageStack&& )		Animation/AnimNodeMessages.h