blob: cd780d1211ae83ee90548ddaf942c624faa0e1ec (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
{-# OPTIONS_GHC -O #-}
-- #11248, comment:6 showed that this tests failed with -O
{-# LANGUAGE DataKinds, TypeOperators, TypeFamilies,
KindSignatures, ConstraintKinds #-}
module T11248 where
import GHC.TypeLits
type a / b = FDiv a b
type a ** b = FMul a b
type family FDiv a b where
FDiv 11648 128 = 91
type family FMul a b where
FMul 64 91 = 5824
type family FGCD a b where
FGCD 128 448 = 64
FGCD 128 5824 = 64
type family FLCM a b where
FLCM 128 5824 = 11648
data CT (m :: Nat) (m' :: Nat)
type H0 = 128
type H1 = 448
type H0' = 11648
type H1' = 5824
main' = let x = undefined :: CT H0 H0'
in foo x :: CT H1 H1'
foo x = bug x
type Ctx2 e r s e' r' =
(e ~ FGCD r e', r' ~ FLCM r e', e ~ FGCD r s)
type Ctx1 e r s e' r' =
(Ctx2 e r s e' r', e' ~ (e ** (r' / r)))
bug :: (Ctx1 e r s e' r')
=> CT r r' -> CT s s'
bug = undefined
|
