tree eb8b622ed6292cbd38d26c8d38d9eba2e0f657d2
parent 854d141a9332c26b09c8164d6f428fb69d9f2fc3
author Alex Herbert <aherbert@apache.org> 1586818306 +0100
committer Alex Herbert <aherbert@apache.org> 1586819041 +0100

Fraction: Use canonical zero as 0 / 1

Change arithmetic to return ZERO where applicable.

Change the factory constructor to return ZERO when the fraction is zero.

This removes the possibility to create 0 / -1. There should be no
equivalent of 0.0 and -0.0 in double. Thus compareTo, equals and
doubleValue() should function as if 0 / 1 and 0 / -1 are identical.