jif.types.label

Class AccessPathUninterpreted

java.lang.Object

jif.types.label.AccessPath

jif.types.label.AccessPathRoot

jif.types.label.AccessPathUninterpreted

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, polyglot.util.Copy

public class AccessPathUninterpreted
extends AccessPathRoot

Represents an access path that is not final, and thus not interpreted: the type system does not track it precisely. These access paths arise during method instantiation and field label instantiation. For example, given the declaration

 
 
      class C {
         final label{} lb;
         int{*this.lb} f;
         ...
      }
 
 
 

and the field access

 
 
 
      bar().f;
 
 
 
 

where bar is a method that returns an object of class C, the type system needs to allow the field access even though access path "bar()" is not final. This is achieved through the use of AccessPathUninterpreted, so that the label of the field access bar().f is "{* <>.lb}", where <>is a AccessPathUninterpreted.

See Also:

AccessPath, JifInstantiator, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface polyglot.util.Copy

polyglot.util.Copy.Util

Constructor Summary

Constructors

Constructor and Description
AccessPathUninterpreted(polyglot.ast.Expr expr, polyglot.util.Position pos)
AccessPathUninterpreted(java.lang.String expr, polyglot.util.Position pos)
AccessPathUninterpreted(java.lang.String expr, polyglot.util.Position pos, boolean allowSubst)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
int	hashCode()
boolean	isCanonical()
boolean	isNeverNull()
boolean	isUninterpreted()
AccessPath	subst(AccessPathRoot r, AccessPath e) Return the result of substituting the root r with the access path e.
java.lang.String	toString()
polyglot.types.Type	type() The type of the access path (when the access path is regarded as an expression).

Methods inherited from class jif.types.label.AccessPathRoot

equivalentTo, labelcheck, root

Methods inherited from class jif.types.label.AccessPath

copy, exprString, position, throwTypes, verify

Methods inherited from class java.lang.Object

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

Constructor Detail

AccessPathUninterpreted

public AccessPathUninterpreted(polyglot.ast.Expr expr,
                               polyglot.util.Position pos)

AccessPathUninterpreted

public AccessPathUninterpreted(java.lang.String expr,
                               polyglot.util.Position pos)

AccessPathUninterpreted

public AccessPathUninterpreted(java.lang.String expr,
                               polyglot.util.Position pos,
                               boolean allowSubst)

Method Detail

isCanonical

public boolean isCanonical()

Specified by:

isCanonical in class AccessPath

isNeverNull

public boolean isNeverNull()

Specified by:

isNeverNull in class AccessPath

isUninterpreted

public boolean isUninterpreted()

Overrides:

isUninterpreted in class AccessPathRoot

subst

public AccessPath subst(AccessPathRoot r,
                        AccessPath e)

Description copied from class: AccessPath

Return the result of substituting the root r with the access path e. For example, given a field access path "this.f", substituting the access path root "this" for the access path "o.g" will result in the access path "o.g.f". This method is used to instantiate procedures for calls, and labels of fields.

Specified by:

subst in class AccessPath

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in class AccessPath

hashCode

public int hashCode()

Specified by:

hashCode in class AccessPath

type

public polyglot.types.Type type()

Description copied from class: AccessPath

The type of the access path (when the access path is regarded as an expression).

Specified by:

type in class AccessPath