Copperbox revision 109.
Intervals can now be added or subtracted - they have been made a Num instance.
Some of the other members of Num - (*) and signum - are a bit more dubious for operating on intervals and need more thought.
Blog Archive
About Me
- Stephen Tetley
- Disambiguating biog as there are a few Stephen Tetley's in the world. I'm neither a cage fighter or yachtsman. I studied Fine Art in the nineties (foundation Bradford 1992, degree Cheltenham 1992 - 95) then Computing part-time at Leeds Met graduating in 2003. I'm the Stephen Tetley on Haskell Cafe and Stackoverflow.