Package org.checkerframework.dataflow.analysis

Interface BackwardTransferFunction<V extends AbstractValue<V>,S extends Store<S>>

Type Parameters:

V - the abstract value type to be tracked by the analysis

S - the store type used in the analysis

All Superinterfaces:

NodeVisitor<TransferResult<V,S>,TransferInput<V,S>>, TransferFunction<V,S>

All Known Implementing Classes:

BusyExprTransfer, LiveVarTransfer

public interface BackwardTransferFunction<V extends AbstractValue<V>,S extends Store<S>>
extends TransferFunction<V,S>

Interface of a backward transfer function for the abstract interpretation used for the backward flow analysis.

Important: The individual transfer functions ( visit*) are allowed to use (and modify) the stores contained in the argument passed; the ownership is transferred from the caller to that function.

Method Summary

Modifier and Type	Method	Description
S	initialExceptionalExitStore(UnderlyingAST underlyingAST)	Returns the initial store that should be used at the exceptional exit block or given the underlying AST of a control flow graph.
S	initialNormalExitStore(UnderlyingAST underlyingAST, List<ReturnNode> returnNodes)	Returns the initial store that should be used at the normal exit block.

Methods inherited from interface org.checkerframework.dataflow.cfg.node.NodeVisitor

visitArrayAccess, visitArrayCreation, visitArrayType, visitAssertionError, visitAssignment, visitBitwiseAnd, visitBitwiseComplement, visitBitwiseOr, visitBitwiseXor, visitBooleanLiteral, visitCase, visitCharacterLiteral, visitClassDeclaration, visitClassName, visitConditionalAnd, visitConditionalNot, visitConditionalOr, visitDoubleLiteral, visitEqualTo, visitExplicitThis, visitExpressionStatement, visitFieldAccess, visitFloatingDivision, visitFloatingRemainder, visitFloatLiteral, visitGreaterThan, visitGreaterThanOrEqual, visitImplicitThis, visitInstanceOf, visitIntegerDivision, visitIntegerLiteral, visitIntegerRemainder, visitLambdaResultExpression, visitLeftShift, visitLessThan, visitLessThanOrEqual, visitLocalVariable, visitLongLiteral, visitMarker, visitMemberReference, visitMethodAccess, visitMethodInvocation, visitNarrowingConversion, visitNotEqual, visitNullChk, visitNullLiteral, visitNumericalAddition, visitNumericalMinus, visitNumericalMultiplication, visitNumericalPlus, visitNumericalSubtraction, visitObjectCreation, visitPackageName, visitParameterizedType, visitPrimitiveType, visitReturn, visitShortLiteral, visitSignedRightShift, visitStringConcatenate, visitStringConversion, visitStringLiteral, visitSuper, visitSwitchExpressionNode, visitSynchronized, visitTernaryExpression, visitThrow, visitTypeCast, visitUnsignedRightShift, visitVariableDeclaration, visitWideningConversion

Method Details

initialNormalExitStore

@SideEffectFree
S initialNormalExitStore(UnderlyingAST underlyingAST,
 List<ReturnNode> returnNodes)

Returns the initial store that should be used at the normal exit block.

Parameters:

underlyingAST - the underlying AST of the given control flow graph

returnNodes - the return nodes of the given control flow graph (an empty list if the underlying AST is not a method)

Returns:

the initial store that should be used at the normal exit block

initialExceptionalExitStore

@SideEffectFree
S initialExceptionalExitStore(UnderlyingAST underlyingAST)

Returns the initial store that should be used at the exceptional exit block or given the underlying AST of a control flow graph.

Parameters:

underlyingAST - the underlying AST of the given control flow graph

Returns:

the initial store that should be used at the exceptional exit block