blob: d969ba7df1f0ee58f82e1a8b403cee4fefb987fa (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
readFail003.hs:4:27: error:
• Couldn't match expected type ‘(a1, [a2], [a3])’
with actual type ‘a1’
‘a1’ is a rigid type variable bound by
the inferred types of
a :: a1
b :: [a2]
c :: [a3]
at readFail003.hs:(4,1)-(8,26)
• In the expression: a
In a pattern binding:
~(a, b, c)
| nullity b = a
| nullity c = a
| otherwise = a
where
nullity = null
• Relevant bindings include
a :: a1 (bound at readFail003.hs:4:3)
b :: [a2] (bound at readFail003.hs:4:5)
c :: [a3] (bound at readFail003.hs:4:7)
|
