#12447: Pretty-printing of equality `~` without parentheses -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): It appears that this was fixed in GHC 8.2.2, since now the type signature has parentheses where it didn't before: {{{ $ ghci -XTypeApplications Bug.hs GHCi, version 8.4.2: http://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from /home/rgscott/.ghci [1 of 1] Compiling Main ( Bug.hs, interpreted ) Ok, one module loaded. λ> :t deferEither @(_ ~ _) deferEither @(_ ~ _) :: (Typeable w1, Typeable w2) => proxy (w1 ~ w2) -> ((w1 ~ w2) => r) -> Either String r }}} I'll unmark the test case from its current `expected_broken` state. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12447#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler