[Haskell-cafe] MonoidHashMap?

Ben Gamari ben at smart-cactus.org
Tue Jan 20 17:35:02 UTC 2015

Tobias Dammers <tdammers at gmail.com> writes:

> Pragmatic workaround: newtype-wrap HashMap?
I've put up a quick package wrapping `HashMap` and `Map` with the
appropriate Monoid instance here [1]. In addition to the types
themselves and a wide variety of `lens` and `newtype` instances, I
export a selection of the more widely used functions supported by `Map`
and `HashMap`.

Those functions that aren't exported can be wrapped using the `Wrapping`
or `Newtype` instance without too much trouble or if there's demand I
wouldn't be opposed to exporting more of `Map`'s functionality. Patches


- Ben

[1] https://github.com/bgamari/monoidal-containers
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