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.ukTrac 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 |