Monoidal containers

0.5.0.0

• Added Data.IntMap.Monoidal and Data.IntMap.Monoidal.Strict, corresponding to Data.IntMap and Data.IntMap.Strict
• Make fromList, insert, and mapKeys from Data.Map.Monoidal and Data.Map.Monoidal.Strict require Semigroup on values to properly capture monoidal behavior instead of reverting to the left-biased semantics of Data.Map.
• Add Align instances and, for sufficiently recent versions of these, Semialign instances
• Support these 0.8.0

0.4.0.0

General changes:

• Added support for unordered-containers < 0.2.8
• Added many more functions in Data.Map.[Strict.]Monoid

Weakened Monoid constraints to Semigroup whenever possible as enabled by the Semigroup-Monoid proposal. This includes,

• the Monoid instance of MonoidalHashMap and MonoidalMap
• the IsList instance of MonoidalHashMap and MonoidalMap
• the modifyDef and mapKeys functions of MonoidalHashMap

0.3 and earlier

Pre-history