Either with a stricter Semigroup instance.

A version of Either whose Semigroup instance requires a Semigroup in the Left argument. Unlike most Validation packages, this package does not depend on the entire Kmettverse, preferring a small dependency tree.

either-semigroup

A version of Either whose Semigroup instance requires a Semigroup in the Left argument.

Unlike most Validation packages, this package does not depend on the entire Kmettverse, preferring a small dependency tree.