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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
Defer01.hs:11:40: warning: [-Wdeferred-type-errors (in -Wdefault)]
• Couldn't match type ‘Char’ with ‘[Char]’
Expected: String
Actual: Char
• In the first argument of ‘putStr’, namely ‘','’
In the second argument of ‘(>>)’, namely ‘putStr ','’
In the expression: putStr "Hello World" >> putStr ','
Defer01.hs:14:5: warning: [-Wdeferred-type-errors (in -Wdefault)]
• Couldn't match expected type ‘Int’ with actual type ‘Char’
• In the expression: 'p'
In an equation for ‘a’: a = 'p'
Defer01.hs:25:1: warning: [-Woverlapping-patterns (in -Wdefault)]
Pattern match has inaccessible right hand side
In an equation for ‘c’: c (C2 x) = ...
Defer01.hs:25:4: warning: [-Winaccessible-code (in -Wdefault)]
• Inaccessible code in
a pattern with constructor: C2 :: Bool -> C Bool,
in an equation for ‘c’
Couldn't match type ‘Int’ with ‘Bool’
• In the pattern: C2 x
In an equation for ‘c’: c (C2 x) = True
Defer01.hs:31:5: warning: [-Wdeferred-type-errors (in -Wdefault)]
• Couldn't match expected type ‘Char -> t’ with actual type ‘Char’
• The function ‘e’ is applied to one value argument,
but its type ‘Char’ has none
In the expression: e 'q'
In an equation for ‘f’: f = e 'q'
• Relevant bindings include f :: t (bound at Defer01.hs:31:1)
Defer01.hs:34:8: warning: [-Wdeferred-type-errors (in -Wdefault)]
• Couldn't match expected type ‘Char’ with actual type ‘a’
‘a’ is a rigid type variable bound by
the type signature for:
h :: forall a. a -> (Char, Char)
at Defer01.hs:33:1-21
• In the expression: x
In the expression: (x, 'c')
In an equation for ‘h’: h x = (x, 'c')
• Relevant bindings include
x :: a (bound at Defer01.hs:34:3)
h :: a -> (Char, Char) (bound at Defer01.hs:34:1)
Defer01.hs:39:17: warning: [-Wdeferred-type-errors (in -Wdefault)]
• Couldn't match expected type ‘Bool’ with actual type ‘T a’
• In the first argument of ‘not’, namely ‘(K a)’
In the first argument of ‘seq’, namely ‘(not (K a))’
In the expression: seq (not (K a)) ()
• Relevant bindings include
a :: a (bound at Defer01.hs:39:3)
i :: a -> () (bound at Defer01.hs:39:1)
Defer01.hs:47:7: warning: [-Wdeferred-type-errors (in -Wdefault)]
• Couldn't match expected type ‘Bool’ with actual type ‘Int’
• In the expression: x
In an equation for ‘k’: k x = x
Defer01.hs:50:5: warning: [-Wdeferred-type-errors (in -Wdefault)]
• Couldn't match expected type: IO a0
with actual type: Char -> IO ()
• Probable cause: ‘putChar’ is applied to too few arguments
In the first argument of ‘(>>)’, namely ‘putChar’
In the expression: putChar >> putChar 'p'
In an equation for ‘l’: l = putChar >> putChar 'p'
*** Exception: Defer01.hs:11:40: error:
• Couldn't match type ‘Char’ with ‘[Char]’
Expected: String
Actual: Char
• In the first argument of ‘putStr’, namely ‘','’
In the second argument of ‘(>>)’, namely ‘putStr ','’
In the expression: putStr "Hello World" >> putStr ','
(deferred type error)
*** Exception: Defer01.hs:14:5: error:
• Couldn't match expected type ‘Int’ with actual type ‘Char’
• In the expression: 'p'
In an equation for ‘a’: a = 'p'
(deferred type error)
*** Exception: Defer01.hs:18:9: error:
• No instance for ‘Eq B’ arising from a use of ‘==’
• In the expression: x == x
In an equation for ‘b’: b x = x == x
(deferred type error)
<interactive>:10:11: error:
• Couldn't match type ‘Bool’ with ‘Int’
Expected: C Int
Actual: C Bool
• In the first argument of ‘c’, namely ‘(C2 True)’
In the first argument of ‘print’, namely ‘(c (C2 True))’
In the expression: print (c (C2 True))
*** Exception: Defer01.hs:28:5: error:
• No instance for ‘Num (a -> a)’ arising from the literal ‘1’
(maybe you haven't applied a function to enough arguments?)
• In the expression: 1
In an equation for ‘d’: d = 1
(deferred type error)
*** Exception: Defer01.hs:31:5: error:
• Couldn't match expected type ‘Char -> t’ with actual type ‘Char’
• The function ‘e’ is applied to one value argument,
but its type ‘Char’ has none
In the expression: e 'q'
In an equation for ‘f’: f = e 'q'
• Relevant bindings include f :: t (bound at Defer01.hs:31:1)
(deferred type error)
*** Exception: Defer01.hs:34:8: error:
• Couldn't match expected type ‘Char’ with actual type ‘a’
‘a’ is a rigid type variable bound by
the type signature for:
h :: forall a. a -> (Char, Char)
at Defer01.hs:33:1-21
• In the expression: x
In the expression: (x, 'c')
In an equation for ‘h’: h x = (x, 'c')
• Relevant bindings include
x :: a (bound at Defer01.hs:34:3)
h :: a -> (Char, Char) (bound at Defer01.hs:34:1)
(deferred type error)
*** Exception: Defer01.hs:39:17: error:
• Couldn't match expected type ‘Bool’ with actual type ‘T a’
• In the first argument of ‘not’, namely ‘(K a)’
In the first argument of ‘seq’, namely ‘(not (K a))’
In the expression: seq (not (K a)) ()
• Relevant bindings include
a :: a (bound at Defer01.hs:39:3)
i :: a -> () (bound at Defer01.hs:39:1)
(deferred type error)
*** Exception: Defer01.hs:43:5: error:
• No instance for ‘MyClass a1’ arising from a use of ‘myOp’
• In the expression: myOp 23
In an equation for ‘j’: j = myOp 23
(deferred type error)
<interactive>:16:8: error:
• Couldn't match type ‘Int’ with ‘Bool’ arising from a use of ‘k’
• In the first argument of ‘print’, namely ‘(k 2)’
In the expression: print (k 2)
In an equation for ‘it’: it = print (k 2)
*** Exception: Defer01.hs:50:5: error:
• Couldn't match expected type: IO a0
with actual type: Char -> IO ()
• Probable cause: ‘putChar’ is applied to too few arguments
In the first argument of ‘(>>)’, namely ‘putChar’
In the expression: putChar >> putChar 'p'
In an equation for ‘l’: l = putChar >> putChar 'p'
(deferred type error)
|
