/
Symbol.purs
47 lines (37 loc) · 1.29 KB
/
Symbol.purs
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module Type.Data.Symbol
( module Data.Symbol
, class CompareSymbol
, compareSymbol
, class AppendSymbol
, appendSymbol
, class Equals
, equals
) where
import Data.Symbol (SProxy(..), class IsSymbol, reflectSymbol, reifySymbol)
import Type.Data.Ordering (OProxy(..), kind Ordering, EQ)
import Type.Data.Ordering (class Equals) as Ordering
import Type.Data.Boolean (kind Boolean, BProxy(..))
-- | Compare two `Symbol` types
class CompareSymbol (lhs :: Symbol)
(rhs :: Symbol)
(out :: Ordering) |
lhs rhs -> out
compareSymbol :: forall l r o. CompareSymbol l r o => SProxy l -> SProxy r -> OProxy o
compareSymbol _ _ = OProxy
-- | Append two `Symbol` types together
class AppendSymbol (lhs :: Symbol)
(rhs :: Symbol)
(out :: Symbol) |
lhs rhs -> out
appendSymbol :: forall l r o. AppendSymbol l r o => SProxy l -> SProxy r -> SProxy o
appendSymbol _ _ = SProxy
class Equals (lhs :: Symbol)
(rhs :: Symbol)
(out :: Boolean) |
lhs rhs -> out
instance equalsSymbol
:: (CompareSymbol lhs rhs ord,
Ordering.Equals EQ ord out)
=> Equals lhs rhs out
equals :: forall l r o. Equals l r o => SProxy l -> SProxy r -> BProxy o
equals _ _ = BProxy