#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 simonpj):
the proposed solution will still blow up when desugaring
No, it won'r blow up when desugaring. Just desugar the constant to `fromRational (readRational "1E1000")`. Nothing blows up there!
One problem with removing fl_value may be that any users of this type (maybe source plugins?) will have to provide a string instead of an actual float
Well `(show f)` is a good string. And I quite like the `fl_before/after/exp` version too. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15646#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler