#16031: Show instance for Data.Fixed does not show parentheses for negatives -------------------------------------+------------------------------------- Reporter: skeuchel | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 8.7 Resolution: | Keywords: Data.Fixed, | Show, 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): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * keywords: Data.Fixed, Show => Data.Fixed, Show, newcomer Comment: Good catch. I wouldn't expect this to be difficult to fix—we'd just need to change the `Show` instance such that negative `Fixed` values are parenthesized with a sufficiently high precedence value. For inspiration, one can look at the existing [http://git.haskell.org/ghc.git/blob/4b3022021d49778bcd29a57308dbe0a076549f1b... Show Integer instance], which parenthesizes negative `Integer`s when the precedence is higher than 6. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16031#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler