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> Unreal Engine API Reference > Developer > RigVMDeveloper > RigVMCompiler > FRigVMBlockExprAST

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FRigVMBlockExprAST

An abstract syntax tree block expression represents a sequence of child expressions to be executed in order.

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Inheritance Hierarchy

FRigVMExprAST

FRigVMBlockExprAST

FRigVMNodeExprAST

	FRigVMBranchExprAST
	FRigVMCallExternExprAST
	FRigVMEntryExprAST
	FRigVMIfExprAST
	FRigVMNoOpExprAST
	FRigVMSelectExprAST

References

Module	RigVMDeveloper
Header	/Engine/Source/Developer/RigVMDeveloper/Public/RigVMCompiler/RigVMAST.h
Include	#include "RigVMCompiler/RigVMAST.h"

Syntax

class FRigVMBlockExprAST : public FRigVMExprAST

Remarks

An abstract syntax tree block expression represents a sequence of child expressions to be executed in order. In C++ a block is represented by the curly braces { expr1, expr2, ...}.

Constructors

	Name	Description
	FRigVMBlockExprAST ( const FRigVMBlockExprAST& )	Disable copy constructor
	FRigVMBlockExprAST ( EType InType, UObject* InSubject )	Default constructor (protected so that only parser can access it)

Destructors

	Name	Description
	~FRigVMBlockExprAST()	Virtual destructor

Functions

	Name	Description
bool	Contains ( const FRigVMExprAST* InExpress... )	Returns true if this block contains a given expression
bool	ContainsEntry()	Returns true if this block contains an entry expression
bool	IsObsolete()	Returns true in case this block should not be executed
bool	ShouldExecute()	Returns true if this block needs to execute this is determined by the block containing an entry expression

Overridden from FRigVMExprAST

		Name	Description
	bool	IsA ( EType InType )	Overload of the type checking mechanism

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