| License | BSD-style (see the LICENSE file in the distribution) |
|---|---|
| Maintainer | libraries@haskell.org |
| Stability | stable |
| Portability | not portable |
| Safe Haskell | Trustworthy |
| Language | Haskell2010 |
Data.Type.Ord
Description
Basic operations on type-level Orderings.
Since: base-4.16.0.0
Synopsis
- type family Compare (a :: k) (b :: k) :: Ordering
- data OrderingI a b where
- type (<=) x y = Assert (x <=? y) (LeErrMsg x y)
- type (<=?) m n = OrdCond (Compare m n) 'True 'True 'False
- type (>=) x y = Assert (x >=? y) (GeErrMsg x y)
- type (>=?) m n = OrdCond (Compare m n) 'False 'True 'True
- type (>) x y = Assert (x >? y) (GtErrMsg x y)
- type (>?) m n = OrdCond (Compare m n) 'False 'False 'True
- type (<) x y = Assert (x <? y) (LtErrMsg x y)
- type (<?) m n = OrdCond (Compare m n) 'True 'False 'False
- type Max m n = OrdCond (Compare m n) n n m
- type Min m n = OrdCond (Compare m n) m m n
- type family OrdCond o lt eq gt where ...
Documentation
type family Compare (a :: k) (b :: k) :: Ordering Source #
Compare branches on the kind of its arguments to either compare by
Symbol or Nat.
Since: base-4.16.0.0
data OrderingI a b where Source #
Ordering data type for type literals that provides proof of their ordering.
Since: base-4.16.0.0
Constructors
| LTI :: Compare a b ~ 'LT => OrderingI a b | |
| EQI :: Compare a a ~ 'EQ => OrderingI a a | |
| GTI :: Compare a b ~ 'GT => OrderingI a b |
type (<=) x y = Assert (x <=? y) (LeErrMsg x y) infix 4 Source #
Comparison (<=) of comparable types, as a constraint.
Since: base-4.16.0.0
type (<=?) m n = OrdCond (Compare m n) 'True 'True 'False infix 4 Source #
Comparison (<=) of comparable types, as a function.
Since: base-4.16.0.0
type (>=) x y = Assert (x >=? y) (GeErrMsg x y) infix 4 Source #
Comparison (>=) of comparable types, as a constraint.
Since: base-4.16.0.0
type (>=?) m n = OrdCond (Compare m n) 'False 'True 'True infix 4 Source #
Comparison (>=) of comparable types, as a function.
Since: base-4.16.0.0
type (>) x y = Assert (x >? y) (GtErrMsg x y) infix 4 Source #
Comparison (>) of comparable types, as a constraint.
Since: base-4.16.0.0
type (>?) m n = OrdCond (Compare m n) 'False 'False 'True infix 4 Source #
Comparison (>) of comparable types, as a function.
Since: base-4.16.0.0
type (<) x y = Assert (x <? y) (LtErrMsg x y) infix 4 Source #
Comparison (<) of comparable types, as a constraint.
Since: base-4.16.0.0
type (<?) m n = OrdCond (Compare m n) 'True 'False 'False infix 4 Source #
Comparison (<) of comparable types, as a function.
Since: base-4.16.0.0
type Max m n = OrdCond (Compare m n) n n m Source #
Maximum between two comparable types.
Since: base-4.16.0.0