TH cannot splice patterns in declaration quotes
Try this:
{-# LANGUAGE TemplateHaskell #-}
module TH2 where
import Language.Haskell.TH
foo :: PatQ -> DecsQ
foo p = [d| $(p) = 1 |]Or this
{-# LANGUAGE TemplateHaskell #-}
module TH3 where
import Language.Haskell.TH
foo :: PatQ -> DecsQ
foo p = [d| f $(p) = 1 |]Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.2.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Template Haskell |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |