Package it.unive.lisa.analysis.nonrelational.inference

Interface InferredValue<T extends InferredValue<T>>

Type Parameters:

T - the concrete type of inferred value

All Superinterfaces:

Lattice<T>, NonRelationalElement<T,ValueExpression,InferenceSystem<T>>, SemanticEvaluator

All Known Implementing Classes:

BaseInferredValue, InferredTypes, NonInterference

public interface InferredValue<T extends InferredValue<T>>
extends NonRelationalElement<T,ValueExpression,InferenceSystem<T>>

A NonRelationalElement that can be inferred by InferenceSystems. The main difference between a NonRelationalDomain and an InferredValue is that eval(ValueExpression, InferenceSystem, ProgramPoint) returns instances of InferredValue.InferredPair, to model the fact that every semantic evaluation also modifies the execution state.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	InferredValue.InferredPair<T extends InferredValue<T>>	A pair of instances of InferredValue, representing the result of an evaluation in the form of <inferred value, new execution state>.
static class	InferredValue.InferredPairRepresentation	A PairRepresentation for an InferredValue.InferredPair.

Field Summary

Fields inherited from interface it.unive.lisa.analysis.Lattice

BOTTOM_REPR, BOTTOM_STRING, TOP_REPR, TOP_STRING

Method Summary

Modifier and Type	Method	Description
InferredValue.InferredPair<T>	eval(ValueExpression expression, InferenceSystem<T> environment, ProgramPoint pp)	Evaluates a ValueExpression, assuming that the values of program variables are the ones stored in environment.

Methods inherited from interface it.unive.lisa.analysis.Lattice

bottom, isBottom, isTop, lessOrEqual, lub, top, widening

Methods inherited from interface it.unive.lisa.analysis.nonrelational.NonRelationalElement

assume, glb, representation, satisfies, variable

Methods inherited from interface it.unive.lisa.analysis.SemanticEvaluator

canProcess, tracksIdentifiers

Method Detail

eval

InferredValue.InferredPair<T> eval(ValueExpression expression,
                                   InferenceSystem<T> environment,
                                   ProgramPoint pp)
                            throws SemanticException

Evaluates a ValueExpression, assuming that the values of program variables are the ones stored in environment.

Parameters:

expression - the expression to evaluate

environment - the environment containing the values of program variables for the evaluation

pp - the program point that where this operation is being evaluated

Returns:

an new instance of this domain, representing the abstract result of expression when evaluated on environment. The returned value is a pair that express both the result of the evaluation and the updated execution state

Throws:

SemanticException - if something goes wrong during the computation