Destroy Data.Eq.Indirect

[Lucu.git] / Network / HTTP / Lucu / StatusCode / Internal.hs

diff --git a/Network/HTTP/Lucu/StatusCode/Internal.hs b/Network/HTTP/Lucu/StatusCode/Internal.hs
index 38188568de8646037ee84465cce740e2df68b8d3..026b1a88b16bfdcb7094b8ae2d0dfe66f6f6508d 100644 (file)
--- a/Network/HTTP/Lucu/StatusCode/Internal.hs
+++ b/Network/HTTP/Lucu/StatusCode/Internal.hs
@@ -4,6 +4,8 @@
   , MultiParamTypeClasses
   , OverlappingInstances
   , TemplateHaskell
+  , TypeFamilies
+  , UndecidableInstances
   , UnicodeSyntax
   , ViewPatterns
   #-}
@@ -11,8 +13,6 @@
 module Network.HTTP.Lucu.StatusCode.Internal
     ( StatusCode(..)
     , SomeStatusCode
-    , (≈)
-    , (≉)
     , statusCodes
     )
     where
@@ -48,36 +48,9 @@ class (Eq sc, Show sc) ⇒ StatusCode sc where
     fromStatusCode ∷ sc → SomeStatusCode
     fromStatusCode = SomeStatusCode
 
--- |Container type for the 'StatusCode' type class.
-data SomeStatusCode
-    = ∀sc. StatusCode sc ⇒ SomeStatusCode sc
-
-instance Eq SomeStatusCode where
-    (==) = (≈)
-
-instance Show SomeStatusCode where
-    show (SomeStatusCode sc) = show sc
-
-infix 4 ≈, ≉
--- |Equivalence of 'StatusCode's. Two 'StatusCode's @a@ and @b@ are
--- said to be equivalent iff @'numericCode' a '==' 'numericCode' b@.
---
--- U+2248, ALMOST EQUAL TO
-(≈) ∷ (StatusCode α, StatusCode β) ⇒ α → β → Bool
-{-# INLINE (≈) #-}
-α ≈ β = numericCode α ≡ numericCode β
-
--- |@(a ≉ b) '==' 'not' (a ≈ b)@
---
--- U+2249, NOT ALMOST EQUAL TO
-(≉) ∷ (StatusCode α, StatusCode β) ⇒ α → β → Bool
-{-# INLINE (≉) #-}
-(≉) = ((¬) ∘) ∘ (≈)
-
-instance StatusCode SomeStatusCode where
-    numericCode   (SomeStatusCode sc) = numericCode   sc
-    textualStatus (SomeStatusCode sc) = textualStatus sc
-    fromStatusCode = id
+instance StatusCode sc ⇒ ConvertSuccess sc SomeStatusCode where
+    {-# INLINE convertSuccess #-}
+    convertSuccess = fromStatusCode
 
 instance StatusCode sc ⇒ ConvertSuccess sc Ascii where
     {-# INLINE convertSuccess #-}
@@ -87,6 +60,10 @@ instance StatusCode sc ⇒ ConvertSuccess sc AsciiBuilder where
     {-# INLINE convertSuccess #-}
     convertSuccess = textualStatus
 
+instance StatusCode sc ⇒ ConvertAttempt sc SomeStatusCode where
+    {-# INLINE convertAttempt #-}
+    convertAttempt = return ∘ cs
+
 instance StatusCode sc ⇒ ConvertAttempt sc Ascii where
     {-# INLINE convertAttempt #-}
     convertAttempt = return ∘ cs
@@ -95,6 +72,25 @@ instance StatusCode sc ⇒ ConvertAttempt sc AsciiBuilder where
     {-# INLINE convertAttempt #-}
     convertAttempt = return ∘ cs
 
+-- |Container type for the 'StatusCode' type class.
+data SomeStatusCode
+    = ∀sc. StatusCode sc ⇒ SomeStatusCode sc
+
+-- |Equivalence of 'StatusCode's. Two 'StatusCode's @α@ and
+-- @β@ are said to be equivalent iff @'numericCode' α '=='
+-- 'numericCode' β@.
+instance Eq SomeStatusCode where
+    {-# INLINE (==) #-}
+    (==) = (∘ numericCode) ∘ (==) ∘ numericCode
+
+instance Show SomeStatusCode where
+    show (SomeStatusCode sc) = show sc
+
+instance StatusCode SomeStatusCode where
+    numericCode   (SomeStatusCode sc) = numericCode   sc
+    textualStatus (SomeStatusCode sc) = textualStatus sc
+    fromStatusCode = id
+
 -- |'QuasiQuoter' for 'StatusCode' declarations.
 --
 -- Top-level splicing