#15646: ghci takes super long time to find the type of large fractional number -------------------------------------+------------------------------------- Reporter: Johannkokos | Owner: | JulianLeviston Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: GHCi | Version: 8.4.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by JulianLeviston): Okay so I'm a bit stuck on implementing a version of `readHexRational :: String -> Rational` that looks like `readHexSignificandExponentPair :: String -> (Integer, Integer)` instead (where the pair returned is the significand and exponent in base 10). The hex float format has its exponent in base 2, not base 10. Should I also store the base within the `FractionalLit` type? Otherwise I'd have to do a (not very) precise conversion, and it strikes me that that'd bring us back to where we were before but on the hex side instead of the decimal side. I might give that a crack, actually. Let me know if not a good idea. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15646#comment:32 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler