instance of synonym
The following non-Haskell 98 instance is accepted even
without -fglasgow-exts:
type Foo = Double
instance Bounded Foo
The error message quotes the relevant part of the
Report (The instance type must be of form (T a b c)
where T is not a synonym, and a,b,c are distinct type
variables) and the code expresses this, but it seems
that type synonyms have already been expanded, so only
non-saturated ones are left at this stage.
ross@soi.city.ac.uk
Trac metadata
Trac field | Value |
---|---|
Version | None |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | ResolvedFixed |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |