type error trying to specialize polymorphic function
The attached module won't compile---definition of 'wrap' is rejected. The error message is
[ 1 of 13] Compiling Pain ( Pain.hs, Pain.o )
Pain.hs:18:7:
Couldn't match expected type `n C O' against inferred type `C'
Expected type: ExTriple (Counter n)
Inferred type: ExTriple (->)
In the expression: scalar
In the definition of `wrap': wrap = scalar
The inferred type is alarming, and in any case the type of wrap is a straightforward specialization of the type of scalar.
Could the problem be with liberal type synonyms? I don't think we're doing anything unreasonable...
Trac metadata
Trac field | Value |
---|---|
Version | 6.12.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | dias@cs.tufts.edu |
Operating system | |
Architecture |