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

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FRigVMParserAST

The abstract syntax tree parser is the main object to parse a RigVM model graph.

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Inheritance Hierarchy

TSharedFromThis

FRigVMParserAST

References

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

Syntax

class FRigVMParserAST : public TSharedFromThis< FRigVMParserAST >

Remarks

The abstract syntax tree parser is the main object to parse a RigVM model graph. It's the memory owner for all expressions and provides functionality for introspection of the tree. The abstract syntax tree is then fed into the RigVMCompiler to generate the byte code for the virtual machine.

Constructors

	Name	Description
	FRigVMParserAST ( URigVMGraph* InGraph, const FRigVMParserASTSettings& InS... )	Default constructor

Destructors

	Name	Description
	~FRigVMParserAST()	Default destructor

Functions

	Name	Description
const FRigVM...	At ( int32 InIndex )	Accessor method for a given root expression
TArray< FRig...	begin()	Begin iterator accessor for the root expressions
bool	CanLink ( URigVMPin* InSourcePin, URigVMPin* InTargetPin, FString* OutFailureReason )	Performs a cycle check for a new potential link (assign or copy) between two pins.
FString	DumpDot()	Returns a string containing a dot file notation for debugging purposes.
FString	DumpText()	Returns a string containing an indented tree structure for debugging purposes.
TArray< FRig...	end()	End iterator accessor for the root expressions
const FRigVM...	GetExprForSubject ( UObject* InSubject )	Returns the expression for a given subject. subjects include nodes and pins.
int32	Num()	Returns the number of root expressions
void	PrepareCycleChecking ( URigVMPin* InPin )	Prepares the parser for cycle checking on a given pin.

Operators

		Name	Description
	const FRigVM...	operator[] ( int32 InIndex )	Operator accessor for a given root expression

Enums

	Name	Description
	ETraverseRelationShip

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