#14384: real numbers, digits after the decimal point - digits of precision -------------------------------------+------------------------------------- Reporter: vanto | Owner: (none) Type: feature request | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: invalid | 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: | -------------------------------------+------------------------------------- Changes (by svenpanne): * status: new => closed * resolution: => invalid Comment: Shortening like this would be wrong, because it would lose precision: {{{ Prelude> decodeFloat ((16.0/0.00002)**2.1) (5102921940679704,-11) Prelude> decodeFloat 2.49166110385e12 (5102921940684800,-11) }}} The default `Show` instance should at least produce as many digits as necessary to reproduce the underlying binary representation, otherwise a lot of code out there would be ''very'' unhappy. If you have other formatting needs, you can use e.g. `Text.Printf.printf`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14384#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler