Package it.unive.lisa.symbolic.value

Class MemoryPointer

java.lang.Object

it.unive.lisa.symbolic.SymbolicExpression

it.unive.lisa.symbolic.value.ValueExpression

it.unive.lisa.symbolic.value.Identifier

it.unive.lisa.symbolic.value.MemoryPointer

public class MemoryPointer
extends Identifier

A memory pointer to a heap location.

Constructor Summary

Constructors

Constructor	Description
MemoryPointer(Type staticType, HeapLocation loc, Annotations annotations, CodeLocation location)	Builds a memory pointer.
MemoryPointer(Type staticType, HeapLocation loc, CodeLocation location)	Builds a memory pointer with empty annotations.

Method Summary

Modifier and Type	Method	Description
<T> T	accept(ExpressionVisitor<T> visitor, java.lang.Object... params)	Accepts an ExpressionVisitor, visiting this expression recursively.
HeapLocation	getReferencedLocation()	Yields the heap location pointed by this pointer.
SymbolicExpression	popScope(ScopeToken token)	Pops the scope identified by the given token from the expression.
SymbolicExpression	pushScope(ScopeToken token)	Pushes a new scope, identified by the give token, in the expression.
java.lang.String	toString()

Methods inherited from class it.unive.lisa.symbolic.value.Identifier

addAnnotation, equals, getAnnotations, getName, hashCode, isWeak, lub

Methods inherited from class it.unive.lisa.symbolic.value.ValueExpression

removeNegations

Methods inherited from class it.unive.lisa.symbolic.SymbolicExpression

getCodeLocation, getDynamicType, getRuntimeTypes, getStaticType, hasRuntimeTypes, setRuntimeTypes

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MemoryPointer

public MemoryPointer(Type staticType,
                     HeapLocation loc,
                     CodeLocation location)

Builds a memory pointer with empty annotations.

Parameters:

staticType - the static type of this expression

loc - the heap location pointed by this memory pointer

location - the code location of the statement that has generated this expression

MemoryPointer

public MemoryPointer(Type staticType,
                     HeapLocation loc,
                     Annotations annotations,
                     CodeLocation location)

Builds a memory pointer.

Parameters:

staticType - the static type of this expression

loc - the heap location pointed by this memory pointer

annotations - the annotation of this memory pointer

location - the code location of the statement that has generated this expression

Method Detail

pushScope

public SymbolicExpression pushScope(ScopeToken token)

Description copied from class: SymbolicExpression

Pushes a new scope, identified by the give token, in the expression. This causes all Variables to become OutOfScopeIdentifiers associated with the given token.

Specified by:

pushScope in class SymbolicExpression

Parameters:

token - the token identifying the scope to push

Returns:

a copy of this expression where the local variables have gone out of scope

popScope

public SymbolicExpression popScope(ScopeToken token)
                            throws SemanticException

Description copied from class: SymbolicExpression

Pops the scope identified by the given token from the expression. This causes all the invisible variables (i.e. OutOfScopeIdentifiers) mapped to the given scope to become visible (i.e. Variables) again.

Specified by:

popScope in class SymbolicExpression

Parameters:

token - the token of the scope to be restored

Returns:

a copy of this expression where the local variables associated with the given scope are visible again

Throws:

SemanticException - if an error occurs during the computation

getReferencedLocation

public HeapLocation getReferencedLocation()

Yields the heap location pointed by this pointer.

Returns:

the heap location pointed by this pointer

accept

public <T> T accept(ExpressionVisitor<T> visitor,
                    java.lang.Object... params)
             throws SemanticException

Description copied from class: SymbolicExpression

Accepts an ExpressionVisitor, visiting this expression recursively.

Specified by:

accept in class SymbolicExpression

Type Parameters:

T - the type of value produced by the visiting callbacks

Parameters:

visitor - the visitor

params - additional optional parameters to pass to each visiting callback

Returns:

the value produced by the visiting operation

Throws:

SemanticException - if an error occurs during the visiting

toString

public java.lang.String toString()

Specified by:

toString in class SymbolicExpression