bring 7.10 type-level equality into scope

README.md

@@ -12,9 +12,11 @@ Design points:
 * Banishes partial functions.
 * Compiler warning on bottoms.
 * Polymorphic string IO functions.
+* Polymorphic show.
 * Automatic string conversions.
-* Type synonyms for major data structures.
-* Basic monad transformers in scope by default.
+* Type for common data structures in scope.
+* Type for all common string types in scope.
+* StateT/ReaderT/ExceptT transformers in scope by default.
 * Foldable / Traversable functions in scope by default.
 * Unsafe functions are prefixed with "unsafe" in separate module.
 * Compiler agnostic, GHC internal modules are abstracted out into Base.

src/Monad.hs

@@ -48,8 +48,8 @@ import Control.Monad hiding ((<$!>))
 import Control.Monad
 #endif
 
-concatMapM :: (Monad m) => (a -> m [b]) -> [a] -> m [b]
-concatMapM f xs = liftM concat (mapM f xs)
+concatMapM :: Monad m => (a -> m [b]) -> [a] -> m [b]
+concatMapM f xs = fmap concat (mapM f xs)
 
 liftM' :: Monad m => (a -> b) -> m a -> m b
 liftM' = (<$!>)

src/Protolude.hs

@@ -1,6 +1,7 @@
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE ExplicitNamespaces   #-}
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
 
 module Protolude (
@@ -129,6 +130,7 @@ import Data.List as X (
   , zipWith
   , zip
   )
+
 import Data.Map as X (Map)
 import Data.Set as X (Set)
 import Data.Sequence as X (Seq)
@@ -140,6 +142,24 @@ import Data.Proxy as X (
     Proxy(..)
   )
 
+import Data.Typeable as X (
+    TypeRep,
+  )
+
+import Data.Type.Coercion as X (
+    Coercion(..)
+  , coerceWith
+  )
+
+import Data.Type.Equality as X (
+    (:~:)(..)
+  , type (==)
+  , sym
+  , trans
+  , castWith
+  , gcastWith
+  )
+
 import Data.Void as X (
     Void
   , absurd
@@ -198,11 +218,11 @@ import Control.Monad.Trans as X (
 import Data.Int as X
 import Data.Bits as X
 import Data.Word as X
-import Data.Bool as X hiding (bool)
-import Data.Char as X (chr)
-import Data.Maybe as X hiding (fromJust)
 import Data.Either as X
 import Data.Complex as X
+import Data.Char as X (chr)
+import Data.Bool as X hiding (bool)
+import Data.Maybe as X hiding (fromJust)
 
 import Data.Function as X (
     const