Difference between revisions of "GHC/Error messages"
< GHC
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Example: |
Example: |
||
<haskell> |
<haskell> |
||
| − | import Prelude hiding ((==)) |
+ | import Prelude hiding ((==)) |
| + | |||
| − | data Foo = Foo |
+ | data Foo = Foo |
| + | |||
instance Eq Foo where |
instance Eq Foo where |
||
(==) a b = True |
(==) a b = True |
||
Revision as of 17:07, 9 October 2009
GHC error messages and their meaning.
"Parse error in pattern"
TODO
Example: TODO
"Foo' is not a (visible) method of class `Bar'"
This error message occurs when one tries to instantiate a class, but did not import the functions one tries to implement.
Example:
import Prelude hiding ((==))
data Foo = Foo
instance Eq Foo where
(==) a b = True