{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TupleSections #-}

-- |
-- Module      :   Grisette.Internal.TH.Derivation.DeriveSimpleMergeable
-- Copyright   :   (c) Sirui Lu 2024
-- License     :   BSD-3-Clause (see the LICENSE file)
--
-- Maintainer  :   siruilu@cs.washington.edu
-- Stability   :   Experimental
-- Portability :   GHC only
module Grisette.Internal.TH.Derivation.DeriveSimpleMergeable
  ( deriveSimpleMergeable,
    deriveSimpleMergeable1,
    deriveSimpleMergeable2,
  )
where

import Grisette.Internal.Internal.Decl.Core.Data.Class.SimpleMergeable
  ( SimpleMergeable (mrgIte),
    SimpleMergeable1 (liftMrgIte),
    SimpleMergeable2 (liftMrgIte2),
  )
import Grisette.Internal.TH.Derivation.BinaryOpCommon
  ( BinaryOpClassConfig
      ( BinaryOpClassConfig,
        binaryOpAllowSumType,
        binaryOpFieldConfigs,
        binaryOpInstanceNames
      ),
    BinaryOpFieldConfig
      ( BinaryOpFieldConfig,
        extraPatNames,
        fieldCombineFun,
        fieldDifferentExistentialFun,
        fieldFunExp,
        fieldFunNames,
        fieldLMatchResult,
        fieldRMatchResult,
        fieldResFun
      ),
    binaryOpAllowExistential,
    defaultFieldFunExp,
    genBinaryOpClass,
  )
import Grisette.Internal.TH.Derivation.Common (DeriveConfig)
import Language.Haskell.TH (Dec, Exp (AppE, ConE), Name, Q)

simpleMergeableConfig :: BinaryOpClassConfig
simpleMergeableConfig :: BinaryOpClassConfig
simpleMergeableConfig =
  BinaryOpClassConfig
    { binaryOpFieldConfigs :: [BinaryOpFieldConfig]
binaryOpFieldConfigs =
        [ BinaryOpFieldConfig
            { extraPatNames :: [String]
extraPatNames = [String
"c"],
              fieldResFun :: [Exp] -> (Exp, Exp) -> Exp -> Q (Exp, [Bool])
fieldResFun = \[Exp
c] (Exp
lhs, Exp
rhs) Exp
f ->
                (,[Bool
True])
                  (Exp -> (Exp, [Bool])) -> Q Exp -> Q (Exp, [Bool])
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> [|$(Exp -> Q Exp
forall a. a -> Q a
forall (m :: * -> *) a. Monad m => a -> m a
return Exp
f) $(Exp -> Q Exp
forall a. a -> Q a
forall (m :: * -> *) a. Monad m => a -> m a
return Exp
c) $(Exp -> Q Exp
forall a. a -> Q a
forall (m :: * -> *) a. Monad m => a -> m a
return Exp
lhs) $(Exp -> Q Exp
forall a. a -> Q a
forall (m :: * -> *) a. Monad m => a -> m a
return Exp
rhs)|],
              fieldCombineFun :: Name -> [Exp] -> Q (Exp, [Bool])
fieldCombineFun =
                \Name
con [Exp]
lst -> (Exp, [Bool]) -> Q (Exp, [Bool])
forall a. a -> Q a
forall (m :: * -> *) a. Monad m => a -> m a
return ((Exp -> Exp -> Exp) -> Exp -> [Exp] -> Exp
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl Exp -> Exp -> Exp
AppE (Name -> Exp
ConE Name
con) [Exp]
lst, [Bool
False]),
              fieldDifferentExistentialFun :: Exp -> Q Exp
fieldDifferentExistentialFun = Q Exp -> Exp -> Q Exp
forall a b. a -> b -> a
const [|undefined|],
              fieldFunExp :: FieldFunExp
fieldFunExp =
                [Name] -> FieldFunExp
defaultFieldFunExp ['mrgIte, 'liftMrgIte, 'liftMrgIte2],
              fieldFunNames :: [Name]
fieldFunNames = ['mrgIte, 'liftMrgIte, 'liftMrgIte2],
              fieldLMatchResult :: Q Exp
fieldLMatchResult = [|undefined|],
              fieldRMatchResult :: Q Exp
fieldRMatchResult = [|undefined|]
            }
        ],
      binaryOpInstanceNames :: [Name]
binaryOpInstanceNames =
        [''SimpleMergeable, ''SimpleMergeable1, ''SimpleMergeable2],
      binaryOpAllowSumType :: Bool
binaryOpAllowSumType = Bool
False,
      binaryOpAllowExistential :: Bool
binaryOpAllowExistential = Bool
True
    }

-- | Derive 'SimpleMergeable' instance for a data type.
deriveSimpleMergeable :: DeriveConfig -> Name -> Q [Dec]
deriveSimpleMergeable :: DeriveConfig -> Name -> Q [Dec]
deriveSimpleMergeable DeriveConfig
deriveConfig =
  DeriveConfig -> BinaryOpClassConfig -> Int -> Name -> Q [Dec]
genBinaryOpClass DeriveConfig
deriveConfig BinaryOpClassConfig
simpleMergeableConfig Int
0

-- | Derive 'SimpleMergeable1' instance for a data type.
deriveSimpleMergeable1 :: DeriveConfig -> Name -> Q [Dec]
deriveSimpleMergeable1 :: DeriveConfig -> Name -> Q [Dec]
deriveSimpleMergeable1 DeriveConfig
deriveConfig =
  DeriveConfig -> BinaryOpClassConfig -> Int -> Name -> Q [Dec]
genBinaryOpClass DeriveConfig
deriveConfig BinaryOpClassConfig
simpleMergeableConfig Int
1

-- | Derive 'SimpleMergeable2' instance for a data type.
deriveSimpleMergeable2 :: DeriveConfig -> Name -> Q [Dec]
deriveSimpleMergeable2 :: DeriveConfig -> Name -> Q [Dec]
deriveSimpleMergeable2 DeriveConfig
deriveConfig =
  DeriveConfig -> BinaryOpClassConfig -> Int -> Name -> Q [Dec]
genBinaryOpClass DeriveConfig
deriveConfig BinaryOpClassConfig
simpleMergeableConfig Int
2