org.jmlspecs.jmlrac.runtime
Class JMLRacBigIntegerUtils

java.lang.Object
  org.jmlspecs.jmlrac.runtime.JMLRacBigIntegerUtils

public class JMLRacBigIntegerUtils

extends Object

Class Specifications

Specifications inherited from class Object

represents objectState <- org.jmlspecs.lang.JMLDataGroup.IT; public represents _getClass <- \typeof(this);

Model Field Summary

 

Model fields inherited from class java.lang.Object

_getClass, objectState, theString

 

Ghost Field Summary

 

Ghost fields inherited from class java.lang.Object

objectTimesFinalized, owner

 

Constructor Summary
private	JMLRacBigIntegerUtils()           Constructs a new instance.

 

Model Method Summary

 

Model methods inherited from class java.lang.Object

hashValue

 

Method Summary
static BigInteger	first(BigInteger i, BigInteger j)           This method is used in the RAC implementation of postfix ++ and -- over \bigint's.
static BigInteger	value(BigInteger i)           This method is used in the RAC implementation of prefix ++ and -- over \bigint's.

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

JMLRacBigIntegerUtils

private JMLRacBigIntegerUtils()

Constructs a new instance.

value

public static BigInteger value(BigInteger i)

This method is used in the RAC implementation of prefix ++ and -- over \bigint's. Given \bigint bi, we translate ++bi into value(bi = bi.add(BigInteger.ONE)). The reason that ++bi is not simply transated into (bi = bi.add(BigInteger.ONE)) is that expressions cannot be used where a statement is expected where as a method call like value(...) can.

Specifications: pure

ensures \result == i;

first

public static BigInteger first(BigInteger i,
                               BigInteger j)

This method is used in the RAC implementation of postfix ++ and -- over \bigint's. E.g. given \bigint bi, we translate bi++ into first(bi, bi = bi.add(BigInteger.ONE)).

Specifications: pure

ensures \result == i;