| Copyright | (C) 2013 Richard Eisenberg |
|---|---|
| License | BSD-style (see LICENSE) |
| Maintainer | Ryan Scott |
| Stability | experimental |
| Portability | non-portable |
| Safe Haskell | None |
| Language | Haskell2010 |
Data.Singletons.Prelude.Eq
Contents
Description
Defines the SEq singleton version of the Eq type class.
Synopsis
- class PEq a where
- class SEq k where
- type family DefaultEq a b where ...
- data (==@#@$) a6989586621679370055
- data a6989586621679370055 ==@#@$$ a6989586621679370056
- type (==@#@$$$) (a6989586621679370055 :: a) (a6989586621679370056 :: a) = (==) a6989586621679370055 a6989586621679370056 :: Bool
- data (/=@#@$) a6989586621679370058
- data a6989586621679370058 /=@#@$$ a6989586621679370059
- type (/=@#@$$$) (a6989586621679370058 :: a) (a6989586621679370059 :: a) = (/=) a6989586621679370058 a6989586621679370059 :: Bool
- data DefaultEqSym0 a6989586621679370061
- data DefaultEqSym1 a6989586621679370061 a6989586621679370062
- type DefaultEqSym2 (a6989586621679370061 :: k) (a6989586621679370062 :: k) = DefaultEq a6989586621679370061 a6989586621679370062 :: Bool
Documentation
The promoted analogue of Eq. If you supply no definition for (==),
then it defaults to a use of DefaultEq.
Associated Types
type (x :: a) == (y :: a) :: Bool infix 4 Source #
type (x :: a) == (y :: a) = x `DefaultEq` y
Instances
| PEq Bool Source # | |
| PEq Ordering Source # | |
| PEq Nat Source # | |
| PEq Symbol Source # | |
| PEq () Source # | |
| PEq Void Source # | |
| PEq All Source # | |
| PEq Any Source # | |
| PEq [a] Source # | |
| PEq (Maybe a) Source # | |
| PEq (TYPE rep) Source # | |
| PEq (Min a) Source # | |
| PEq (Max a) Source # | |
| PEq (First a) Source # | |
| PEq (Last a) Source # | |
| PEq (WrappedMonoid m) Source # | |
| PEq (Option a) Source # | |
| PEq (Identity a) Source # | |
| PEq (First a) Source # | |
| PEq (Last a) Source # | |
| PEq (Dual a) Source # | |
| PEq (Sum a) Source # | |
| PEq (Product a) Source # | |
| PEq (Down a) Source # | |
| PEq (NonEmpty a) Source # | |
| PEq (Either a b) Source # | |
| PEq (a, b) Source # | |
| PEq (Arg a b) Source # | |
| PEq (Proxy s) Source # | |
| PEq (a, b, c) Source # | |
| PEq (Const a b) Source # | |
| PEq (a, b, c, d) Source # | |
| PEq (a, b, c, d, e) Source # | |
| PEq (a, b, c, d, e, f) Source # | |
| PEq (a, b, c, d, e, f, g) Source # | |
The singleton analogue of Eq. Unlike the definition for Eq, it is required
that instances define a body for (%==). You may also supply a body for (%/=).
Minimal complete definition
Methods
(%==) :: forall (a :: k) (b :: k). Sing a -> Sing b -> Sing (a == b) infix 4 Source #
Boolean equality on singletons
(%/=) :: forall (a :: k) (b :: k). Sing a -> Sing b -> Sing (a /= b) infix 4 Source #
Boolean disequality on singletons
Instances
type family DefaultEq a b where ... Source #
A sensible way to compute Boolean equality for types of any kind. Note
that this definition is slightly different from the (==) type family
from Data.Type.Equality in base, as (==) attempts to distinguish
applications of type constructors from other types. As a result,
a == a does not reduce to True for every a, but
does reduce to DefaultEq a aTrue for every a. The latter behavior is more desirable
for singletons' purposes, so we use it instead of (==).
Defunctionalization symbols
data (==@#@$) a6989586621679370055 infix 4 Source #
Instances
| SEq a => SingI ((==@#@$) :: TyFun a (a ~> Bool) -> Type) Source # | |
| SuppressUnusedWarnings ((==@#@$) :: TyFun a (a ~> Bool) -> Type) Source # | |
Defined in Data.Singletons.Prelude.Eq Methods suppressUnusedWarnings :: () Source # | |
| type Apply ((==@#@$) :: TyFun a (a ~> Bool) -> Type) (a6989586621679370055 :: a) Source # | |
data a6989586621679370055 ==@#@$$ a6989586621679370056 infix 4 Source #
Instances
| (SEq a, SingI x) => SingI ((==@#@$$) x :: TyFun a Bool -> Type) Source # | |
| SuppressUnusedWarnings ((==@#@$$) a6989586621679370055 :: TyFun a Bool -> Type) Source # | |
Defined in Data.Singletons.Prelude.Eq Methods suppressUnusedWarnings :: () Source # | |
| type Apply ((==@#@$$) a6989586621679370055 :: TyFun a Bool -> Type) (a6989586621679370056 :: a) Source # | |
type (==@#@$$$) (a6989586621679370055 :: a) (a6989586621679370056 :: a) = (==) a6989586621679370055 a6989586621679370056 :: Bool infix 4 Source #
data (/=@#@$) a6989586621679370058 infix 4 Source #
Instances
| SEq a => SingI ((/=@#@$) :: TyFun a (a ~> Bool) -> Type) Source # | |
| SuppressUnusedWarnings ((/=@#@$) :: TyFun a (a ~> Bool) -> Type) Source # | |
Defined in Data.Singletons.Prelude.Eq Methods suppressUnusedWarnings :: () Source # | |
| type Apply ((/=@#@$) :: TyFun a (a ~> Bool) -> Type) (a6989586621679370058 :: a) Source # | |
data a6989586621679370058 /=@#@$$ a6989586621679370059 infix 4 Source #
Instances
| (SEq a, SingI x) => SingI ((/=@#@$$) x :: TyFun a Bool -> Type) Source # | |
| SuppressUnusedWarnings ((/=@#@$$) a6989586621679370058 :: TyFun a Bool -> Type) Source # | |
Defined in Data.Singletons.Prelude.Eq Methods suppressUnusedWarnings :: () Source # | |
| type Apply ((/=@#@$$) a6989586621679370058 :: TyFun a Bool -> Type) (a6989586621679370059 :: a) Source # | |
type (/=@#@$$$) (a6989586621679370058 :: a) (a6989586621679370059 :: a) = (/=) a6989586621679370058 a6989586621679370059 :: Bool infix 4 Source #
data DefaultEqSym0 a6989586621679370061 Source #
Instances
| SuppressUnusedWarnings (DefaultEqSym0 :: TyFun k (k ~> Bool) -> Type) Source # | |
Defined in Data.Singletons.Prelude.Eq Methods suppressUnusedWarnings :: () Source # | |
| type Apply (DefaultEqSym0 :: TyFun k (k ~> Bool) -> Type) (a6989586621679370061 :: k) Source # | |
Defined in Data.Singletons.Prelude.Eq type Apply (DefaultEqSym0 :: TyFun k (k ~> Bool) -> Type) (a6989586621679370061 :: k) = DefaultEqSym1 a6989586621679370061 | |
data DefaultEqSym1 a6989586621679370061 a6989586621679370062 Source #
Instances
| SuppressUnusedWarnings (DefaultEqSym1 a6989586621679370061 :: TyFun k Bool -> Type) Source # | |
Defined in Data.Singletons.Prelude.Eq Methods suppressUnusedWarnings :: () Source # | |
| type Apply (DefaultEqSym1 a6989586621679370061 :: TyFun k Bool -> Type) (a6989586621679370062 :: k) Source # | |
Defined in Data.Singletons.Prelude.Eq type Apply (DefaultEqSym1 a6989586621679370061 :: TyFun k Bool -> Type) (a6989586621679370062 :: k) = DefaultEqSym2 a6989586621679370061 a6989586621679370062 | |
type DefaultEqSym2 (a6989586621679370061 :: k) (a6989586621679370062 :: k) = DefaultEq a6989586621679370061 a6989586621679370062 :: Bool Source #