From 4772025626d78127536c341c38052d23ca953ae3 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom@tomsmeding.com>
Date: Fri, 3 Oct 2025 23:05:24 +0200
Subject: Move TH experiments to test-th

---
 test/Arith.hs | 103 ----------------------------------------------------------
 1 file changed, 103 deletions(-)
 delete mode 100644 test/Arith.hs

(limited to 'test/Arith.hs')

diff --git a/test/Arith.hs b/test/Arith.hs
deleted file mode 100644
index c34baa8..0000000
--- a/test/Arith.hs
+++ /dev/null
@@ -1,103 +0,0 @@
-{-# LANGUAGE RankNTypes #-}
-{-# LANGUAGE LambdaCase #-}
-{-# LANGUAGE StandaloneDeriving #-}
-{-# LANGUAGE GADTs #-}
-{-# LANGUAGE QuantifiedConstraints #-}
-module Arith where
-
-import Data.Type.Equality
-
-import Data.Expr.SharingRecovery
-
-
-data Typ t where
-  TInt :: Typ Int
-  TBool :: Typ Bool
-  TPair :: Typ a -> Typ b -> Typ (a, b)
-  TFun :: Typ a -> Typ b -> Typ (a -> b)
-deriving instance Show (Typ t)
-
-instance TestEquality Typ where
-  testEquality TInt TInt = Just Refl
-  testEquality TBool TBool = Just Refl
-  testEquality (TPair a b) (TPair a' b')
-    | Just Refl <- testEquality a a'
-    , Just Refl <- testEquality b b'
-    = Just Refl
-  testEquality (TFun a b) (TFun a' b')
-    | Just Refl <- testEquality a a'
-    , Just Refl <- testEquality b b'
-    = Just Refl
-  testEquality _ _ = Nothing
-
-class KnownType t where τ :: Typ t
-instance KnownType Int where τ = TInt
-instance KnownType Bool where τ = TBool
-instance (KnownType a, KnownType b) => KnownType (a, b) where τ = TPair τ τ
-instance (KnownType a, KnownType b) => KnownType (a -> b) where τ = TFun τ τ
-
-data PrimOp a b where
-  POAddI :: PrimOp (Int, Int) Int
-  POMulI :: PrimOp (Int, Int) Int
-  POEqI :: PrimOp (Int, Int) Bool
-deriving instance Show (PrimOp a b)
-
-opType2 :: PrimOp a b -> Typ b
-opType2 = \case
-  POAddI -> TInt
-  POMulI -> TInt
-  POEqI -> TBool
-
-data Fixity = Infix | Prefix
-  deriving (Show)
-
-primOpPrec :: PrimOp a b -> (Int, (Int, Int))
-primOpPrec POAddI = (6, (6, 7))
-primOpPrec POMulI = (7, (7, 8))
-primOpPrec POEqI = (4, (5, 5))
-
-prettyPrimOp :: Fixity -> PrimOp a b -> ShowS
-prettyPrimOp fix op =
-  let s = case op of
-            POAddI -> "+"
-            POMulI -> "*"
-            POEqI -> "=="
-  in showString $ case fix of
-       Infix -> s
-       Prefix -> "(" ++ s ++ ")"
-
-data ArithF r t where
-  A_Prim :: PrimOp a b -> r a -> ArithF r b
-  A_Pair :: r a -> r b -> ArithF r (a, b)
-  A_If :: r Bool -> r a -> r a -> ArithF r a
-deriving instance (forall a. Show (r a)) => Show (ArithF r t)
-
-instance Functor1 ArithF
-instance Traversable1 ArithF where
-  traverse1 f (A_Prim op x) = A_Prim op <$> f x
-  traverse1 f (A_Pair x y) = A_Pair <$> f x <*> f y
-  traverse1 f (A_If x y z) = A_If <$> f x <*> f y <*> f z
-
-prettyArithF :: Monad m
-             => (forall a. Int -> BExpr Typ env ArithF a -> m ShowS)
-             -> Int -> ArithF (BExpr Typ env ArithF) t -> m ShowS
-prettyArithF pr d = \case
-  A_Prim op (BOp _ (A_Pair a b)) -> do
-    let (dop, (dopL, dopR)) = primOpPrec op
-    a' <- pr dopL a
-    b' <- pr dopR b
-    return $ showParen (d > dop) $ a' . showString " " . prettyPrimOp Infix op . showString " " . b'
-  A_Prim op (BLet ty rhs e) ->
-    pr d (BLet ty rhs (BOp (opType2 op) (A_Prim op e)))
-  A_Prim op arg -> do
-    arg' <- pr 11 arg
-    return $ showParen (d > 10) $ prettyPrimOp Prefix op . showString " " . arg'
-  A_Pair a b -> do
-    a' <- pr 0 a
-    b' <- pr 0 b
-    return $ showString "(" . a' . showString ", " . b' . showString ")"
-  A_If a b c -> do
-    a' <- pr 0 a
-    b' <- pr 0 b
-    c' <- pr 0 c
-    return $ showParen (d > 0) $ showString "if " . a' . showString " then " . b' . showString " else " . c'
-- 
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