FExpressionNode | Unreal Engine 5.7 Documentation

API > API/Runtime > API/Runtime/Core

A node in an expression. Can be constructed from any C++ type that has a corresponding DEFINE_EXPRESSION_NODE_TYPE. Evaluation behaviour (unary/binary operator etc) is defined in the expression grammar, rather than the type itself.


Name	FExpressionNode
Type	class
Header File	/Engine/Source/Runtime/Core/Public/Misc/ExpressionParserTypes.h
Include Path	#include "Misc/ExpressionParserTypes.h"

Syntax

class FExpressionNode

Constructors

Name	Remarks	Include Path
FExpressionNode ()	Default constructor	Misc/ExpressionParserTypes.h
FExpressionNode ( T In )	Construction from client expression data type	Misc/ExpressionParserTypes.h
FExpressionNode ( FExpressionNode&& In )	Movable, but non copyable.	Misc/ExpressionParserTypes.h
FExpressionNode ( const FExpressionNode& )		Misc/ExpressionParserTypes.h
FExpressionNode ( T In )

Destructors

Name	Remarks	Include Path	Unreal Specifiers
~FExpressionNode()		Misc/ExpressionParserTypes.h

Constants

Name	Type	Remarks	Include Path
MaxStackAllocationSize	uint32	The maximum size of type we will allow allocation on the stack (for efficiency).	Misc/ExpressionParserTypes.h

Variables

Protected

Name	Type	Remarks	Include Path	Unreal Specifiers
InlineBytes	uint8		Misc/ExpressionParserTypes.h
TypeId	FGuid	TypeID - 16 bytes	Misc/ExpressionParserTypes.h

Functions

Public

Name	Remarks	Include Path
const T * Cast()	Cast this node to the specified type. Will return nullptr if the types do not match.	Misc/ExpressionParserTypes.h
FExpressionNode Copy()	Copy this node and its wrapped data	Misc/ExpressionParserTypes.h
const FGuid & GetTypeId()	Get the type identifier of this node	Misc/ExpressionParserTypes.h

Operators

Name	Remarks	Include Path	Unreal Specifiers
FExpressionNode & operator= ( FExpressionNode&& In )		Misc/ExpressionParserTypes.h
FExpressionNode & operator= ( const FExpressionNode& )		Misc/ExpressionParserTypes.h

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