Maintained by

Oleg Grenrus This version can be pinned in stack with:`lattices-2.2.1@sha256:6be0b8bf9e51486a572f3e7893658ed809283a1a730123b501ca091f32d44bb2,3408`

Module documentation for 2.2.1
Depends on 11 packages

(full list with versions ) :

base ,

containers ,

deepseq ,

hashable ,

integer-logarithms ,

QuickCheck ,

tagged ,

transformers ,

universe-base ,

universe-reverse-instances ,

unordered-containers In mathematics, a lattice is a partially ordered set in which every two
elements `x`

and `y`

have a unique supremum (also called a least upper bound, join, or `x /\ y`

)
and a unique infimum (also called a greatest lower bound, meet, or `x \/ y`

).

This package provide type-classes for different lattice types, as well
as a class for the partial order.

2.2.1 (2024-05-16)
Support GHC-8.6.5..GHC-9.10.1
2.2 (2022-03-15)
Drop `semigroupoids`

dependency in favour of `foldable1-classes-compat`

.
Be careful with which `Foldable1`

class you end up using.
2.1 (2022-12-27)
2.0.3 (2021-10-30)
2.0.2 (2020-02-18)
Add `Algebra.Lattice.Stacked`

#99
2.0.1 (2019-07-22)
Add `(PartialOrd a, PartialOrd b) => PartialOrd (Either a b)`

instance
2 (2019-04-17)
Reduce to three classes (from six): `Lattice`

, `BoundedMeetSemiLattice`

,
`BoundedJoinSemiLattice`

.
The latter two names are kept to help migration.
Remove `Algebra.Enumerable`

module. Use `universe`

package.
Drop GHC-7.4.3 support (broken `ConstraintKinds`

)
Move `Algebra.Lattice.Free`

to `Algebra.Lattice.Free.Final`

Add concrete syntax `Algebra.Lattice.Free`

and `Algebra.Heyting.Free`

using
LJT-proof search for `Eq`

and `PartialOrd`

Change `PartialOrd [a]`

to be `leq = isSubsequenceOf`

1.7.1.1 (2019-07-05)
Allow newer dependencies, update cabal file
1.7.1 (2018-01-29)
1.7 (2017-10-01)
`HashMap`

instances changed
`PartialOrd Meet`

and `Join`

`PartialOrd ()`

and `Void`

`BoundedLattice (HashSet a)`

`PartialOrd [a]`

(`leq = isInfixOf`

)
1.6.0 (2017-06-26)
Correct PartialOrd Map and IntMap instances
Add Lattice instance for `containers`

types.
Change `meets1`

and `joins1`

to use `Foldable1`

Add `comparable`

to `PartialOrd`

Add `Algebra.Lattice.Free`

module
Add `Divisibility`

lattice.
Fix `Lexicographic`

.
1.5.0 (2015-12-18)
Move `PartialOrd (k -> v)`

instance into own module
`Const`

and `Identity`

instances
added `fromBool`

Add `Lexicographic`

, `Ordered`

and `Op`

newtypes
1.4.1 (2015-10-26)
`MINIMAL`

pragma in with GHC 7.8
Add `DEPREACTED`

pragma for `meet`

and `join`

,
use infix version `\/`

and `/\`

1.4 (2015-09-19)
Infix operators
`meets`

and `joins`

generalised to work on any `Foldable`

Deprecate `Algebra.Enumerable`

, use universe package
Add `Applicative`

and `Monad`

typeclasses to `Dropped`

, `Lifted`

and `Levitated`

Add `Semigroup`

instance to `Join`

and `Meet`

Add instances for `()`

, `Proxy`

, `Tagged`

and `Void`

1.3 (2015-05-18)
relaxed constraint for `BoundedLattice (Levitated a)`

added instances to `Dropped`

, `Levitated`

and `Lifted`

:
from base
`NFData`

`Hashable`

added `HashSet`

and `HashMap`

lattice instances

Stackage is a service provided by the
Haskell Foundation
│ Originally developed by
FP Complete