LicenseRef-PublicDomain licensed and maintained by James Cook

Module documentation for 0.4

A dependent sum is a generalization of a particular way of thinking about the Either type. Either a b can be thought of as a 2-tuple (tag, value), where the value of the tag determines the type of the value. In particular, either tag = Left and value :: a or tag = Right and value :: b.

This package allows you to define your own dependent sum types by using your own "tag" types.

Changes

Revision history for dependent-sum

0.5.0.0

  • Make Some a newtype with associated pattern synonyms using unsafeCoerce to avoid the GADT performance overhead. This shouldn’t affect users.
  • Deprecate the constructor name This in favor of Some.
  • Drop support for GHC older than 8.0.
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