blob: 88cf8abac7c5ef966abdb276dd32d1e7fe0e0f5e (
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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
rebindable6.hs:106:17:
No instance for (HasSeq (IO a -> t0 -> IO b))
(maybe you haven't applied a function to enough arguments?)
arising from a do statement
The type variable ‘t0’ is ambiguous
Relevant bindings include
g :: IO (Maybe b) (bound at rebindable6.hs:104:19)
f :: IO a (bound at rebindable6.hs:104:17)
test_do :: IO a -> IO (Maybe b) -> IO b
(bound at rebindable6.hs:104:9)
Note: there is a potential instance available:
instance HasSeq (IO a -> IO b -> IO b)
-- Defined at rebindable6.hs:52:18
In a stmt of a 'do' block: f
In the expression:
do { f;
Just (b :: b) <- g;
return b }
In an equation for ‘test_do’:
test_do f g
= do { f;
Just (b :: b) <- g;
return b }
rebindable6.hs:107:17:
No instance for (HasFail ([Prelude.Char] -> t1))
(maybe you haven't applied a function to enough arguments?)
arising from a do statement
The type variable ‘t1’ is ambiguous
Note: there is a potential instance available:
instance HasFail (String -> IO a)
-- Defined at rebindable6.hs:57:18
In a stmt of a 'do' block: Just (b :: b) <- g
In the expression:
do { f;
Just (b :: b) <- g;
return b }
In an equation for ‘test_do’:
test_do f g
= do { f;
Just (b :: b) <- g;
return b }
rebindable6.hs:108:17:
No instance for (HasReturn (b -> t1))
(maybe you haven't applied a function to enough arguments?)
arising from a use of ‘return’
The type variable ‘t1’ is ambiguous
Relevant bindings include
b :: b (bound at rebindable6.hs:107:23)
g :: IO (Maybe b) (bound at rebindable6.hs:104:19)
test_do :: IO a -> IO (Maybe b) -> IO b
(bound at rebindable6.hs:104:9)
Note: there is a potential instance available:
instance HasReturn (a -> IO a) -- Defined at rebindable6.hs:42:18
In a stmt of a 'do' block: return b
In the expression:
do { f;
Just (b :: b) <- g;
return b }
In an equation for ‘test_do’:
test_do f g
= do { f;
Just (b :: b) <- g;
return b }
|
