when giving an error "No instance for C (a -> b)", suggest that a function may be underapplied
Suggestion of ibotty here: http://www.reddit.com/r/haskell/comments/2go92u/beginner_error_messages_in_c_vs_haskell/cklm7jk
Prelude> print length
<interactive>:2:1:
No instance for (Show ([a0] -> Int)) arising from a use of ‘print’
but there is an instance for (Show Int);
maybe you omitted an argument to ‘length’ of type [a0]?
In the expression: print length
In an equation for ‘it’: it = print length
I guess the trickiest part will be figuring out what function is underapplied.
Trac metadata
Trac field | Value |
---|---|
Version | 7.8.3 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |