Difference between revisions of "GHC/Error messages"
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GHC error messages and their meaning. |
GHC error messages and their meaning. |
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− | == "foo' is not |
+ | == "`foo' is not applied to enough type arguments" == |
+ | |||
+ | TODO |
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+ | |||
+ | Example: TODO |
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+ | |||
+ | == "`foo' is not a (visible) method of class `Bar'" == |
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This error message occurs when one tries to instantiate a class, but did not import the functions one tries to implement. |
This error message occurs when one tries to instantiate a class, but did not import the functions one tries to implement. |
Revision as of 13:49, 3 December 2009
GHC error messages and their meaning.
"`foo' is not applied to enough type arguments"
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
"Cannot match a monotype with `Foo'"
See this Haskell-Cafe thread.
"Parse error in pattern"
TODO
Example: TODO