ApiAnnotations : Nested forall loses forall annotation
When parsing
{-# LANGUAGE ScopedTypeVariables #-}
extremumNewton :: forall tag. forall tag1.
tag -> tag1 -> Int
extremumNewton = undefinedThe parser attaches an AnnForall to the second forall, which appears as a nested HsForAllTy.
Somewhere this nesting is flattened, and the tyvarbndrs are collapsed into a single HsForAllTy. In this process the second AnnForAll loses its anchor in the AST.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler (Parser) |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | mpickering |
| Operating system | |
| Architecture |