git.iko.soy/monoidal-containers
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Maps using values' monoidal structure during merging

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monoidal-containers

Often when working with the containers offered by the containers and unordered-containers packages one would prefer the monoidal structure of the values to be used when resolving conflicts between keys when merging structures. Sadly, these are not the semantics offered by the provided instances. This package provides newtypes with an appropriate set of instances and utility functions to make them usable.