@hackage / these

An either-or-both data type.

Latest1.2.1

About

Metadata

  • Last updated , by phadej
  • License BSD-3-Clause

  • Maintained by: Oleg Grenrus <oleg.grenrus@iki.fi>

  • Lottery factor: 0

Links

Installation

Tested Compilers

  1. 9.10.1
  2. 9.8.4
  3. 9.6.6
  4. 9.4.8
  5. 9.2.8
  6. 9.0.2
  7. 8.10.7
  8. 8.8.4
  9. 8.6.5

Readme

This package provides a data type These a b which can hold a value of either type or values of each type. This is usually thought of as an "inclusive or" type (contrasting Either a b as "exclusive or") or as an "outer join" type (contrasting (a, b) as "inner join").

data These a b = This a | That b | These a b

Since version 1, this package was split into parts: