#13887: Template Haskell pretty-printer doesn't parenthesize infix datatype names in data declarations -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: ak3n Type: bug | Status: closed Priority: normal | Milestone: 8.2.1 Component: Template Haskell | Version: 8.0.1 Resolution: fixed | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3717, Wiki Page: | Phab:D3802 -------------------------------------+------------------------------------- Changes (by RyanGlScott): * differential: Phab:D3717 => Phab:D3717, Phab:D3802 Comment: I found yet another example of this sort of thing: {{{#!hs {-# LANGUAGE DataKinds #-} {-# LANGUAGE TemplateHaskell #-} module Main where import Data.Proxy import GHC.Generics import Language.Haskell.TH main :: IO () main = do putStrLn $([t| Proxy (:*:) |] >>= stringE . pprint) putStrLn $([t| Proxy '(:*:) |] >>= stringE . pprint) putStrLn $([t| Proxy '(:) |] >>= stringE . pprint) }}} {{{ Data.Proxy.Proxy (GHC.Generics.:*:) Data.Proxy.Proxy 'GHC.Generics.:*: Data.Proxy.Proxy 'GHC.Types.: }}} Unfortunately, we must have overlooked applying this fix to //promoted// infix constructors. I've got a patch at Phab:D3802 which addresses this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13887#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler