uk.ac.man.cs.rainbow.rapa.data
Class Register

java.lang.Object
  |
  +--uk.ac.man.cs.rainbow.rapa.data.Expression
        |
        +--uk.ac.man.cs.rainbow.rapa.data.Register

All Implemented Interfaces:

Argument, Comparable, Serializable, Value, VariableContainer

Direct Known Subclasses:

Register.Subscripted

public class Register

extends Expression

implements Comparable

See Also:

Serialized Form

Inner Class Summary

static class	Register.NotFoundException Exception thrown when a request to evaluate a register that is not part of the current state is made.
static class	Register.Subscripted

Field Summary

static boolean

printType

Constructor Summary

Register(String name, Type type)

Method Summary

Value	apply(Unifier u) Apply a unifier to this value to get a new value.
int	compareTo(Object o)
void	compatableWith(Argument arg) Check that this value is compatable with the argument.
boolean	equals(Value e)
ValueWhite[]	evaluate(Map funcs, Map regs, HashMap whiteboard) Evaluate the expression/value under the given substitution over functions and valuation of register contents.
String	getName()
Type	getResultType()
int	hashCode()
boolean	hasVariable()
boolean	occurs(Substitution s, Variable v) Check whether the variable occurs in this value under the given substitution.
Value	subst(Substitution s) Apply a substitution to this value to get a new value.
String	toString()
Substitution	unify(Substitution s, Value e) Get the substitution which unifies this value with the given value, after applying the given substitution.

Methods inherited from class uk.ac.man.cs.rainbow.rapa.data.Expression

equals, getNodeType, subst

Methods inherited from class java.lang.Object

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

Field Detail

printType

public static boolean printType

Constructor Detail

Register

public Register(String name,
                Type type)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getName

public String getName()

getResultType

public Type getResultType()

Overrides:

getResultType in class Expression

apply

public Value apply(Unifier u)

Description copied from interface: Value

Apply a unifier to this value to get a new value.

Overrides:

apply in class Expression

occurs

public boolean occurs(Substitution s,
                      Variable v)

Description copied from interface: Value

Check whether the variable occurs in this value under the given substitution.

Overrides:

occurs in class Expression

unify

public Substitution unify(Substitution s,
                          Value e)
                   throws NotUnifiable

Description copied from interface: Value

Get the substitution which unifies this value with the given value, after applying the given substitution.

Overrides:

unify in class Expression

Following copied from interface: uk.ac.man.cs.rainbow.rapa.data.Value

Parameters:

subst - The substitution to apply first.

val - The value to unify with this value.

Returns:

The substitution that is the combination of the given substitution and whatever extra substitutions are necessary to unify the two values.

Throws:

NotUnifiable - If the two values cannot be unified.

hasVariable

public boolean hasVariable()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Value e)

Overrides:

equals in class Expression

subst

public Value subst(Substitution s)

Description copied from interface: Value

Apply a substitution to this value to get a new value.

Overrides:

subst in class Expression

compatableWith

public void compatableWith(Argument arg)

Description copied from interface: Value

Check that this value is compatable with the argument.

Overrides:

compatableWith in class Expression

Following copied from interface: uk.ac.man.cs.rainbow.rapa.data.Value

See Also:

GeneralSubstitution

evaluate

public ValueWhite[] evaluate(Map funcs,
                             Map regs,
                             HashMap whiteboard)

Description copied from interface: Value

Evaluate the expression/value under the given substitution over functions and valuation of register contents. May return multiple values if there are several possible valuations of the given expression.

Overrides:

evaluate in class Expression

compareTo

public int compareTo(Object o)

Specified by:

compareTo in interface Comparable