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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #5616

TH type quotes cannot contain free type variables

A type quote cannot contain a free type variable, e.g.

module TH where
import Language.Haskell.TH

foo = [t| a |]

This is very awkward when passing arguments that are going into instance declarations since these need to have free type variables.

Trac metadata
Trac field Value
Version 7.2.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Template Haskell
Test case
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