Add fourmolu code formatter

Author: kderme

cardano-chain-gen/src/Cardano/Mock/Chain.hs

@@ -2,30 +2,29 @@
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
-module Cardano.Mock.Chain
-  ( Chain' (..)
-  , State
-  , Chain
-  , getTipState
-  , successorBlock
-  , pointOnChain
-  , rollback
-  , findFirstPointChain
-  , pointIsAfter
-  , findFirstPointByBlockNo
-  , currentTipBlockNo
-  ) where
-
-import           Ouroboros.Consensus.Block
+module Cardano.Mock.Chain (
+  Chain' (..),
+  State,
+  Chain,
+  getTipState,
+  successorBlock,
+  pointOnChain,
+  rollback,
+  findFirstPointChain,
+  pointIsAfter,
+  findFirstPointByBlockNo,
+  currentTipBlockNo,
+) where
+
+import Ouroboros.Consensus.Block
 import qualified Ouroboros.Consensus.Ledger.Extended as Consensus
-
 import qualified Ouroboros.Network.AnchoredFragment as AF
-import           Ouroboros.Network.Block
+import Ouroboros.Network.Block
 
 -- | This looks a lot like the 'Chain' defined in Ouroboros.Network.MockChain.Chain
 -- but this version includes also the ledger states.
-data Chain' block st =
-    Genesis st
+data Chain' block st
+  = Genesis st
   | Chain' block st :> (block, st)
   deriving (Eq, Ord, Show, Functor)
 
@@ -39,44 +38,47 @@ getTipState :: Chain' blk st -> st
 getTipState (Genesis st) = st
 getTipState (_ :> (_, st)) = st
 
-successorBlock :: forall block . HasHeader block => Point block -> Chain block -> Maybe block
+successorBlock :: forall block. HasHeader block => Point block -> Chain block -> Maybe block
 successorBlock p c0 | headPoint c0 == p = Nothing
 successorBlock p c0 =
-    go c0
+  go c0
   where
     go :: Chain block -> Maybe block
-    go (c :> (b',st') :> (b, _)) | blockPoint b' == p = Just b
-                          | otherwise          = go (c :> (b',st'))
-    go (Genesis _ :> (b, _))   | p == genesisPoint  = Just b
+    go (c :> (b', st') :> (b, _))
+      | blockPoint b' == p = Just b
+      | otherwise = go (c :> (b', st'))
+    go (Genesis _ :> (b, _)) | p == genesisPoint = Just b
     go _ = Nothing
 
 pointOnChain :: HasHeader block => Point block -> Chain block -> Bool
-pointOnChain GenesisPoint               _           = True
-pointOnChain (BlockPoint _ _)           (Genesis _) = False
+pointOnChain GenesisPoint _ = True
+pointOnChain (BlockPoint _ _) (Genesis _) = False
 pointOnChain p@(BlockPoint pslot phash) (c :> (b, _))
-  | pslot >  blockSlot b = False
+  | pslot > blockSlot b = False
   | phash == blockHash b = True
-  | otherwise            = pointOnChain p c
+  | otherwise = pointOnChain p c
 
 headPoint :: HasHeader block => Chain block -> Point block
 headPoint (Genesis _) = genesisPoint
-headPoint (_ :> (b, _))    = blockPoint b
-
-findFirstPointChain
-  :: HasHeader block
-  => [Point block]
-  -> Chain block
-  -> Maybe (Point block)
-findFirstPointChain [] _     = Nothing
-findFirstPointChain (p:ps) c
-  | pointOnChain p c    = Just p
-  | otherwise           = findFirstPointChain ps c
+headPoint (_ :> (b, _)) = blockPoint b
+
+findFirstPointChain ::
+  HasHeader block =>
+  [Point block] ->
+  Chain block ->
+  Maybe (Point block)
+findFirstPointChain [] _ = Nothing
+findFirstPointChain (p : ps) c
+  | pointOnChain p c = Just p
+  | otherwise = findFirstPointChain ps c
 
 rollback :: HasHeader block => Chain block -> Point block -> Maybe (Chain block)
-rollback (c :>  (b, st)) p | blockPoint b == p = Just (c :>  (b, st))
-                           | otherwise         = rollback c p
-rollback (Genesis st) p    | p == genesisPoint = Just (Genesis st)
-                           | otherwise         = Nothing
+rollback (c :> (b, st)) p
+  | blockPoint b == p = Just (c :> (b, st))
+  | otherwise = rollback c p
+rollback (Genesis st) p
+  | p == genesisPoint = Just (Genesis st)
+  | otherwise = Nothing
 
 -- | Check whether the first point is after the second point on the chain.
 -- Usually, this can simply be checked using the 'SlotNo's, but some blocks
@@ -85,16 +87,21 @@ rollback (Genesis st) p    | p == genesisPoint = Just (Genesis st)
 -- When the first point equals the second point, the answer will be 'False'.
 --
 -- PRECONDITION: both points are on the chain.
-pointIsAfter :: HasHeader block
-             => Point block -> Point block -> Chain block -> Bool
+pointIsAfter ::
+  HasHeader block =>
+  Point block ->
+  Point block ->
+  Chain block ->
+  Bool
 pointIsAfter pt1 pt2 c =
-    case pointSlot pt1 `compare` pointSlot pt2 of
-      LT -> False
-      GT -> True
-      EQ | Just (_, afterPt2) <- AF.splitAfterPoint (toAnchoredFragment c) pt2
-         -> AF.pointOnFragment pt1 afterPt2
-         | otherwise
-         -> False
+  case pointSlot pt1 `compare` pointSlot pt2 of
+    LT -> False
+    GT -> True
+    EQ
+      | Just (_, afterPt2) <- AF.splitAfterPoint (toAnchoredFragment c) pt2 ->
+          AF.pointOnFragment pt1 afterPt2
+      | otherwise ->
+          False
 
 -- * Conversions to/from 'AnchoredFragment'
 
@@ -109,19 +116,18 @@ toOldestFirst :: Chain block -> [block]
 toOldestFirst = reverse . toNewestFirst
 
 -- | Produce the list of blocks, from most recent back to genesis
---
 toNewestFirst :: Chain block -> [block]
 toNewestFirst = foldChain (flip (:)) []
 
 foldChain :: (a -> b -> a) -> a -> Chain b -> a
 foldChain _blk gen (Genesis _st) = gen
-foldChain  blk gen (c :> (b, _)) = blk (foldChain blk gen c) b
+foldChain blk gen (c :> (b, _)) = blk (foldChain blk gen c) b
 
-findFirstPointByBlockNo
-  :: HasHeader block
-  => Chain block
-  -> BlockNo
-  -> Maybe (Point block)
+findFirstPointByBlockNo ::
+  HasHeader block =>
+  Chain block ->
+  BlockNo ->
+  Maybe (Point block)
 findFirstPointByBlockNo c blkNo = case c of
   Genesis _ -> Nothing
   (_ :> (b, _)) | blockNo b == blkNo -> Just $ blockPoint b

cardano-chain-gen/src/Cardano/Mock/ChainDB.hs

@@ -4,28 +4,26 @@
 {-# LANGUAGE MonoLocalBinds #-}
 {-# LANGUAGE UndecidableInstances #-}
 
-module Cardano.Mock.ChainDB
-  ( ChainDB (..)
-  , initChainDB
-  , headTip
-  , currentState
-  , replaceGenesisDB
-  , extendChainDB
-  , findFirstPoint
-  , rollbackChainDB
-  , findPointByBlockNo
-  , currentBlockNo
-  ) where
-
-import           Ouroboros.Consensus.Block
-import           Ouroboros.Consensus.Config
-import           Ouroboros.Consensus.Ledger.Abstract
+module Cardano.Mock.ChainDB (
+  ChainDB (..),
+  initChainDB,
+  headTip,
+  currentState,
+  replaceGenesisDB,
+  extendChainDB,
+  findFirstPoint,
+  rollbackChainDB,
+  findPointByBlockNo,
+  currentBlockNo,
+) where
+
+import Cardano.Mock.Chain
+import Ouroboros.Consensus.Block
+import Ouroboros.Consensus.Config
+import Ouroboros.Consensus.Ledger.Abstract
 import qualified Ouroboros.Consensus.Ledger.Extended as Consensus
-import           Ouroboros.Consensus.Ledger.SupportsProtocol
-
-import           Ouroboros.Network.Block (Tip (..))
-
-import           Cardano.Mock.Chain
+import Ouroboros.Consensus.Ledger.SupportsProtocol
+import Ouroboros.Network.Block (Tip (..))
 
 -- | Thin layer around 'Chain' that knows how to apply blocks and maintain
 -- new and old states. The state here, which is the 'Chain', is not a MVar,
@@ -73,7 +71,7 @@ findFirstPoint points chainDB = findFirstPointChain points (cchain chainDB)
 rollbackChainDB :: HasHeader block => ChainDB block -> Point block -> Maybe (ChainDB block)
 rollbackChainDB chainDB p = do
   chain <- rollback (cchain chainDB) p
-  Just $ chainDB { cchain = chain}
+  Just $ chainDB {cchain = chain}
 
 findPointByBlockNo :: HasHeader block => ChainDB block -> BlockNo -> Maybe (Point block)
 findPointByBlockNo chainDB =