feat[dev]: import Prelude

app/Main.hs

@@ -1,7 +1,5 @@
+{-# LANGUAGE Safe #-}
 module Main (main) where
 
-import Control.Applicative (pure)
-import System.IO (IO)
-
 main :: IO ()
 main = pure ()

package.yaml

@@ -21,7 +21,6 @@ description:         Please see the README on GitHub at <https://github.com/gith
 default-extensions:
   - DerivingStrategies
   - ImportQualifiedPost
-  - NoImplicitPrelude
   - OverloadedRecordDot
   - OverloadedStrings
   - StandaloneKindSignatures
@@ -37,6 +36,7 @@ dependencies:
 ghc-options:
 - -Weverything
 - -Wno-unsafe
+- -Wno-implicit-prelude # coding without prelude is no fun
 
 library:
   source-dirs: src

scalie.cabal

@@ -31,7 +31,6 @@ library
       Language.Scalie.Core.Expression.PatternMatchCase
       Language.Scalie.Core.Expression.VariableIdentifier
       Language.Scalie.Core.Module
-      Language.Scalie.Core.Pattern
       Language.Scalie.Core.Provenance
       Language.Scalie.Core.Provenance.SourceLocation
       Language.Scalie.Domain.Type
@@ -42,12 +41,11 @@ library
   default-extensions:
       DerivingStrategies
       ImportQualifiedPost
-      NoImplicitPrelude
       OverloadedRecordDot
       OverloadedStrings
       StandaloneKindSignatures
       RoleAnnotations
-  ghc-options: -Weverything -Wno-unsafe
+  ghc-options: -Weverything -Wno-unsafe -Wno-implicit-prelude
   build-depends:
       QuickCheck
     , base
@@ -65,12 +63,11 @@ executable scalie-exe
   default-extensions:
       DerivingStrategies
       ImportQualifiedPost
-      NoImplicitPrelude
       OverloadedRecordDot
       OverloadedStrings
       StandaloneKindSignatures
       RoleAnnotations
-  ghc-options: -Weverything -Wno-unsafe -threaded -rtsopts -with-rtsopts=-N
+  ghc-options: -Weverything -Wno-unsafe -Wno-implicit-prelude -threaded -rtsopts -with-rtsopts=-N
   build-depends:
       QuickCheck
     , base
@@ -92,12 +89,11 @@ test-suite scalie-test
   default-extensions:
       DerivingStrategies
       ImportQualifiedPost
-      NoImplicitPrelude
       OverloadedRecordDot
       OverloadedStrings
       StandaloneKindSignatures
       RoleAnnotations
-  ghc-options: -Weverything -Wno-unsafe -threaded -rtsopts -with-rtsopts=-N
+  ghc-options: -Weverything -Wno-unsafe -Wno-implicit-prelude -threaded -rtsopts -with-rtsopts=-N
   build-depends:
       QuickCheck
     , base

src/Data/Map/Implicit.hs

@@ -6,22 +6,20 @@
 {-# LANGUAGE StandaloneDeriving #-} -- derive Eq
 -- | A Map that derives the keys for the mapping from the items.
 
-module Data.Map.Implicit (ImplicitMap(), get, ImplicitKeyOf(..), empty, fromList, lookup) where
-import Data.Kind (Type, Constraint)
-import Data.Map (Map)
-import Text.Show (Show (show))
-import Data.String (String)
-import Control.Category ((.), Category (id))
-import Data.Map qualified as Map
-import Text.Read (Read (readPrec), ReadPrec)
-import Data.List qualified as List
+module Data.Map.Implicit (ImplicitMap(), get, ImplicitKeyOf(..), empty, fromList, Data.Map.Implicit.lookup) where
+
 import Control.Arrow (Arrow ((&&&)), (>>>))
-import Data.Functor ((<$>))
-import Data.Ord (Ord)
-import Data.Eq (Eq)
+
+import Data.Kind (Type, Constraint)
+
+import Data.Map (Map)
+import Data.Map qualified as Map
+import Data.List qualified as List
+
+import Text.Read (Read (readPrec), ReadPrec)
+
 import Test.QuickCheck.Arbitrary (Arbitrary (arbitrary))
 import Test.QuickCheck.Gen (Gen)
-import Data.Maybe (Maybe)
 
 -- | This map will use the 'ImplicitKeyOf' class to compute the keys of the values.
 

src/Language/Scalie/Bytecode/Instruction.hs

@@ -1,11 +1,9 @@
 {-# LANGUAGE Safe #-}
 {-# LANGUAGE EmptyDataDeriving #-} -- instruction doesn't have any cases yet
 module Language.Scalie.Bytecode.Instruction (Instruction(..)) where
+
 import Data.Kind (Type)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Eq (Eq)
-import Prelude (Integer) -- this is apparently the only safe way to import 'Integer'
+
 import Data.Word (Word8)
 
 type Instruction :: Type

src/Language/Scalie/Bytecode/Object.hs

@@ -4,15 +4,17 @@
 -- | This module describes a Bytecode Object, similar to a java classfile. It will hold source information, shared constants and 
 
 module Language.Scalie.Bytecode.Object (Object(..)) where
+
+-- meta
 import Data.Kind (Type)
+
+-- data structures
 import Data.Vector (Vector)
+
+-- Scalie
 import Language.Scalie.Core.Provenance (Provenance)
 import Language.Scalie.Bytecode.Instruction (Instruction)
 import Language.Scalie.Core.Provenance.SourceLocation (SourceLocation)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Semigroup (Semigroup)
-import Data.Monoid (Monoid)
 
 type Object :: Type
 type role Object

src/Language/Scalie/Bytecode/Object/Builder.hs

@@ -2,12 +2,10 @@
 {-# LANGUAGE DeriveFunctor #-}
 {-# LANGUAGE InstanceSigs #-}
 module Language.Scalie.Bytecode.Object.Builder (Builder, runBuilder) where
+
 import Data.Kind (Type)
+
 import Language.Scalie.Bytecode.Object qualified as Bytecode
-import Data.Functor (Functor)
-import Control.Applicative (Applicative (pure, (<*>)))
-import Control.Monad (Monad ((>>=)))
-import Prelude (undefined)
 
 type Builder :: Type -> Type
 type role Builder representational

src/Language/Scalie/Compiler/Bytecode.hs

@@ -1,23 +1,11 @@
-{-# LANGUAGE Trustworthy #-} -- uses vector operations
-{-# LANGUAGE OverloadedRecordDot #-}
-module Language.Scalie.Compiler.Bytecode (EntryPoint, compile, CompilationError(..)) where
-import Language.Scalie.Core.Module (Module (definitions))
-import Data.Text (Text)
-import Language.Scalie.Core.Provenance (Provenance (value, Provenance, source))
-import Language.Scalie.Core.Provenance.SourceLocation (SourceLocation)
-import Language.Scalie.Bytecode.Object qualified as Bytecode
+{-# LANGUAGE Safe #-}
+module Language.Scalie.Compiler.Bytecode (EntryPoint, CompilationError(..)) where
+
+-- meta
 import Data.Kind (Type)
-import Data.Either (Either (Left, Right))
-import Data.Vector qualified as Vector
-import Control.Category ((.))
-import Data.Function (($))
-import Data.Functor ((<$>))
-import Data.Map.Implicit qualified as ImplicitMap
-import Data.Maybe (Maybe(Nothing, Just))
-import Language.Scalie.Core.Definition (Definition(body, name))
-import Language.Scalie.Core.Expression (Expression(RawInt))
-import Language.Scalie.Bytecode.Instruction qualified as Instruction
-import Prelude (undefined)
+
+-- data structures
+import Data.Text (Text)
 
 -- | The name of the entrypoint function
 
@@ -26,15 +14,3 @@ type EntryPoint = Text
 
 type CompilationError :: Type
 newtype CompilationError = NameNotFound Text
-
-compile :: Module (Provenance SourceLocation) -> EntryPoint -> Either CompilationError Bytecode.Object
-compile mod entry = undefined
-{- let
-  topLevelDefinitions = mod.definitions.value
-  in Bytecode.Object . Vector.fromList <$> case ImplicitMap.lookup entry topLevelDefinitions of
-    Nothing -> Left $ NameNotFound entry
-    Just def -> Right
-      [ (\(RawInt i) -> Instruction.PushInteger i) <$> def.body
-      , Provenance def.name.source (Instruction.ReturnValues 1)
-      ]
--}

src/Language/Scalie/Core/Definition.hs

@@ -7,26 +7,26 @@
 {-# LANGUAGE OverloadedRecordDot #-}
 module Language.Scalie.Core.Definition (Definition(..)) where
 
+-- meta
 import Data.Kind (Type)
-import Data.Text (Text)
 
+-- data structures
+import Data.Text (Text)
+import Data.Functor.Identity (Identity)
 import Data.Map.Implicit (ImplicitKeyOf (KeyType, keyOf))
 
-import Language.Scalie.Domain.Type qualified as Scalie.Domain
+import Data.Text qualified as Text
+
+-- scalie
 import Language.Scalie.Core.Expression (Expression)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Eq (Eq)
+import Language.Scalie.Core.Provenance (Provenance (value))
+
+import Language.Scalie.Domain.Type qualified as Scalie.Domain
+
+-- library: QuickCheck
 import Test.QuickCheck.Arbitrary (Arbitrary (arbitrary))
 import Test.QuickCheck.Gen (Gen)
-import Control.Applicative (Applicative((<*>)), (<$>))
-import Data.Text qualified as Text
-import Control.Category (Category((.)))
 import Test.QuickCheck.Modifiers (UnicodeString(getUnicodeString))
-import Data.Functor (Functor)
-import Language.Scalie.Core.Provenance (Provenance (value))
-import Data.Functor.Identity (Identity)
-import Data.Maybe (Maybe)
 
 -- | The definition of a value or a function (which is also a value)
 --

src/Language/Scalie/Core/Expression.hs

@@ -4,25 +4,26 @@
 {-# LANGUAGE InstanceSigs #-}
 module Language.Scalie.Core.Expression (Expression(..)) where
 
-import Prelude (Integer, Integral (div))
+-- meta
 import Data.Kind (Type)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Eq (Eq)
-import Data.Ratio (Rational)
+
+-- data structures
 import Data.Text (Text)
 import Data.List.NonEmpty (NonEmpty)
+
+import Data.Text qualified as Text
+import Data.List.NonEmpty qualified as NonEmpty
+
+-- scalie
 import Language.Scalie.Core.Expression.PatternMatchCase (PatternMatchCase)
+import Language.Scalie.Core.Expression.VariableIdentifier (VariableIdentifier)
+
+-- library: QuickCheck
 import Test.QuickCheck (Arbitrary (arbitrary), oneof, UnicodeString (getUnicodeString), NonEmptyList (getNonEmpty))
 import Test.QuickCheck.Gen (Gen)
-import Data.Functor ((<$>), Functor)
-import Control.Category ((.))
-import Data.Text qualified as Text
-import Language.Scalie.Core.Expression.VariableIdentifier (VariableIdentifier)
-import Control.Applicative ((<*>))
-import Data.List.NonEmpty qualified as NonEmpty
 import Test.QuickCheck qualified as Gen
 
+
 type Expression :: (Type -> Type) -> Type
 type role Expression nominal
 data Expression f

src/Language/Scalie/Core/Expression/ConstructorIdentifier.hs

@@ -5,15 +5,16 @@
 
 module Language.Scalie.Core.Expression.ConstructorIdentifier (ConstructorIdentifier(..)) where
 
+-- meta
 import Data.Kind (Type)
+
+-- data structures
 import Data.Text (Text)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Eq (Eq)
-import Test.QuickCheck (Arbitrary (arbitrary), Gen, getUnicodeString)
-import Control.Category ((.))
+
 import Data.Text qualified as Text
-import Data.Functor ((<$>))
+
+-- library: QuickCheck
+import Test.QuickCheck (Arbitrary (arbitrary), Gen, getUnicodeString)
 
 -- | Encodes the knowledge that the contained text is always a Constructor name.
 

src/Language/Scalie/Core/Expression/Pattern.hs

@@ -6,19 +6,22 @@
 -- | Pattern types for the core language. 'Pattern' enumerates all the possible ways to match on a value.
 
 module Language.Scalie.Core.Expression.Pattern (Pattern(..)) where
+
+-- meta
 import Data.Kind (Type)
+
+-- data structures
+import Data.Vector (Vector)
+
+import Data.Vector qualified as Vector
+
+-- Scalie
 import Language.Scalie.Core.Expression.VariableIdentifier (VariableIdentifier)
 import Language.Scalie.Core.Expression.ConstructorIdentifier (ConstructorIdentifier)
-import Data.Vector (Vector)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Eq (Eq)
+
+-- library: QuickCheck
 import Test.QuickCheck (Arbitrary (arbitrary), Gen, oneof)
-import Data.Functor ((<$>), Functor)
-import Control.Applicative ((<*>))
-import Data.Vector qualified as Vector
 import Test.QuickCheck.Gen qualified as Gen
-import Prelude (div) -- seems to be the safe way to import div
 
 -- | This is a single pattern. It may be used for a single argument.
 

src/Language/Scalie/Core/Expression/PatternMatchCase.hs

@@ -3,17 +3,17 @@
 {-# LANGUAGE UndecidableInstances #-}
 {-# LANGUAGE InstanceSigs #-}
 module Language.Scalie.Core.Expression.PatternMatchCase (PatternMatchCase(..)) where
+
+-- meta
 import Data.Kind (Type)
+
+-- scalie
 import {-# SOURCE #-} Language.Scalie.Core.Expression (Expression)
 import Language.Scalie.Core.Expression.Pattern (Pattern)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Eq (Eq)
+
+-- library: QuickCheck
 import Test.QuickCheck (Arbitrary (arbitrary), Gen)
-import Data.Functor ((<$>))
-import Control.Applicative ((<*>))
 import Test.QuickCheck.Gen qualified as Gen
-import Prelude (div)
 
 type PatternMatchCase :: (Type -> Type) -> Type
 type role PatternMatchCase nominal

src/Language/Scalie/Core/Expression/VariableIdentifier.hs

@@ -5,15 +5,15 @@
 
 module Language.Scalie.Core.Expression.VariableIdentifier (VariableIdentifier(..)) where
 
+-- meta
 import Data.Kind (Type)
+
+-- data structures
 import Data.Text (Text)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Eq (Eq)
-import Test.QuickCheck (Arbitrary (arbitrary), Gen, UnicodeString (getUnicodeString))
-import Control.Category ((.))
 import Data.Text qualified as Text
-import Data.Functor ((<$>))
+
+-- library: QuickCheck
+import Test.QuickCheck (Arbitrary (arbitrary), Gen, UnicodeString (getUnicodeString))
 
 -- | Encodes the knowledge that the contained text is always a variable name.
 

src/Language/Scalie/Core/Module.hs

@@ -8,8 +8,6 @@ module Language.Scalie.Core.Module (Module(..)) where
 import Data.Kind (Type)
 import Language.Scalie.Core.Definition (Definition)
 import Data.Map.Implicit (ImplicitMap)
-import Text.Show (Show)
-import Text.Read (Read)
 
 -- | A module groups multiple related definitions.
 --
@@ -31,7 +29,7 @@ import Text.Read (Read)
 
 type Module :: (Type -> Type) -> Type
 type role Module nominal
-data Module f = Module
+newtype Module f = Module
   { definitions :: f (ImplicitMap (Definition f))
   }
 

src/Language/Scalie/Core/Pattern.hs

@@ -1,30 +0,0 @@
-{-# LANGUAGE Safe #-}
-{-# LANGUAGE DerivingStrategies #-}
-module Language.Scalie.Core.Pattern (Pattern(..)) where
-import Prelude (Integer)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Kind qualified
-
-
--- | A pattern in scalie. Used to select branches to jump to, with pattern matching.
---
--- >>> RawInt 15
--- RawInt 15
---
--- >>> import Data.Maybe (Maybe)
--- >>> import Text.Read (readMaybe)
--- >>> readMaybe "RawInt (-5)" :: Maybe Pattern
--- Just (RawInt (-5))
---
--- >>> readMaybe "RawInt (+5)" :: Maybe Pattern
--- Nothing
---
--- >>> readMaybe "RawInt (5)" :: Maybe Pattern
--- Just (RawInt 5)
-
-type Pattern :: Data.Kind.Type
-data Pattern
-  = RawInt Integer
-  deriving stock (Show, Read)
-

src/Language/Scalie/Core/Provenance.hs

@@ -2,18 +2,14 @@
 {-# LANGUAGE InstanceSigs #-}
 {-# LANGUAGE DeriveTraversable #-} -- implies DeriveFunctor and DeriveFoldable
 module Language.Scalie.Core.Provenance (Provenance(..)) where
+
+-- meta
 import Data.Kind (Type)
-import Text.Show (Show)
-import Text.Read (Read)
-import Data.Functor (Functor)
-import Data.Foldable (Foldable)
+
+-- classes
 import Data.Bifunctor (Bifunctor (bimap))
-import Data.Traversable (Traversable)
 import Data.Bifoldable (Bifoldable (bifoldMap))
-import Data.Monoid (Monoid)
-import Data.Semigroup ((<>))
 import Data.Bitraversable (Bitraversable (bitraverse))
-import Control.Applicative (Applicative (liftA2))
 
 type Provenance :: Type -> Type -> Type
 type role Provenance representational representational 

test/Spec.hs

@@ -1,8 +1,6 @@
 {-# LANGUAGE Unsafe #-} -- unsafe: Uses functions imported from unsafe modules
-import System.IO (IO)
 import Test.Data.Map.Implicit qualified
 import Test.Tasty qualified as Tasty
-import Data.Function (($))
 
 main :: IO ()
 main = Tasty.defaultMain $ Tasty.testGroup "all"

test/Test/Data/Map/Implicit.hs

@@ -3,19 +3,21 @@
 {-# OPTIONS_GHC -Wno-all-missed-specialisations #-} -- a lot of warnings for unspecialized 'read' and 'show', which I cannot specialize
 -- I wouldn't know how at least, they're not my datatypes, I cannot use the hint and add an 'INLINABLE' pragma
 module Test.Data.Map.Implicit (testGroup) where
-import Test.QuickCheck.Roundtrip (roundtrips)
-import Text.Show (show)
-import Text.Read (read)
-import Data.Map.Implicit (ImplicitMap)
-import Data.Bool (Bool)
-import Language.Scalie.Core.Definition (Definition)
+
 import Data.Functor.Identity (Identity)
+
+import Data.Map.Implicit (ImplicitMap)
+
+import Language.Scalie.Core.Definition (Definition)
+
 import Test.QuickCheck (Property, allProperties)
-import Data.String (String)
-import Control.Applicative (pure)
-import Data.Maybe (Maybe)
-import Test.Tasty.QuickCheck qualified as Tasty.QuickCheck
+import Test.QuickCheck.Roundtrip (roundtrips)
+
 import Test.Tasty (TestTree)
+import Test.Tasty.QuickCheck (QuickCheckMaxSize(QuickCheckMaxSize))
+
+import Test.Tasty qualified as Tasty
+import Test.Tasty.QuickCheck qualified as Tasty.QuickCheck
 
 -- | This is testworthy since I have somehow hand-hacked the read/show de/serialization of 'ImplicitMap'
 
@@ -30,4 +32,5 @@ allTests :: [(String, Property)]
 allTests = $allProperties
 
 testGroup :: TestTree
-testGroup = Tasty.QuickCheck.testProperties "Data.Map.Implicit" allTests
+testGroup = Tasty.localOption (QuickCheckMaxSize 25) -- it is necessary to restrain the size because the generated core would get veeeeeery big otherwise
+  $ Tasty.QuickCheck.testProperties "Data.Map.Implicit" allTests

test/Test/QuickCheck/Roundtrip.hs

@@ -1,7 +1,5 @@
 {-# LANGUAGE Safe #-}
 module Test.QuickCheck.Roundtrip (roundtrips) where
-import Data.Eq ((==), Eq)
-import Data.Bool (Bool)
 
 roundtrips :: Eq t1 => (t2 -> t1) -> (t1 -> t2) -> t1 -> Bool
 roundtrips back forth x = x == back (forth x)