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> Unreal Engine API Reference > Runtime > Core > Misc > FExpressionNode

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FExpressionNode

A node in an expression.

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Inheritance Hierarchy

FNoncopyable

FExpressionNode

References

Module	Core
Header	/Engine/Source/Runtime/Core/Public/Misc/ExpressionParserTypes.h
Include	#include "Misc/ExpressionParserTypes.h"

Syntax

class FExpressionNode : private FNoncopyable

Remarks

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.

Constructors

	Name	Description
	FExpressionNode()	Default constructor
	FExpressionNode ( FExpressionNode&& In )	Move construction/assignment
	FExpressionNode ( T In, typename TEnableIf<!TPointerIsC... )	Construction from client expression data type

Destructors

	Name	Description
	~FExpressionNode()

Functions

	Name	Description
const T *...	Cast()	Cast this node to the specified type. Will return nullptr if the types do not match.
FExpressionN...	Copy()	Copy this node and its wrapped data
const FGuid ...	GetTypeId()	Get the type identifier of this node

Operators

		Name	Description
	FExpressionN...	operator= ( FExpressionNode&& In )

Constants

Name	Description
MaxStackAllocationSize	The maximum size of type we will allow allocation on the stack (for efficiency).

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