Only

The 1-tuple type or single-value "collection"

Version on this page:	0.1@rev:1
LTS Haskell 22.42:	0.1@rev:2
Stackage Nightly 2024-11-18:	0.1@rev:2
Latest on Hackage:	0.1@rev:2

See all snapshots Only appears in

BSD-3-Clause licensed by Herbert Valerio Riedel

Maintained by [email protected]

This version can be pinned in stack with:Only-0.1@sha256:f92f5da97e647451f1ee7f5bf44914fb75062d08ccd3f36b2000d649c63d13aa,1373

Module documentation for 0.1

Data
- Data.Tuple
  - Data.Tuple.Only

Depends on 2 packages(full list with versions):

base, deepseq

Used by 6 packages in lts-13.28(full list with versions):

cassava, indexed-list-literals, optparse-generic, postgresql-simple, roc-id, sqlite-simple

This package provides a canonical anonymous 1-tuple type missing from Haskell for attaching typeclass instances.

NOTE: There is also the OneTuple package which by using a boxed data-type provides a 1-tuple type which has laziness properties which are more faithful to the ones of Haskell's native tuples; whereas the primary purpose of Only is to provide the traditionally so named type-wrapper for attaching typeclass instances.